Update Python from 3.11.8 to 3.12.2

253 files changed, 11720 insertions, 26688 deletions

diff --git a/contrib/tools/python3/src/Lib/_aix_support.py b/contrib/tools/python3/src/Lib/_aix_support.py
index 1d8482ff38..dadc75c2bf 100644
--- a/contrib/tools/python3/src/Lib/_aix_support.py
+++ b/contrib/tools/python3/src/Lib/_aix_support.py
@@ -3,12 +3,24 @@
 import sys
 import sysconfig
 
-try:
-    import subprocess
-except ImportError:  # pragma: no cover
-    # _aix_support is used in distutils by setup.py to build C extensions,
-    # before subprocess dependencies like _posixsubprocess are available.
-    import _bootsubprocess as subprocess
+
+# Taken from _osx_support _read_output function
+def _read_cmd_output(commandstring, capture_stderr=False):
+    """Output from successful command execution or None"""
+    # Similar to os.popen(commandstring, "r").read(),
+    # but without actually using os.popen because that
+    # function is not usable during python bootstrap.
+    import os
+    import contextlib
+    fp = open("/tmp/_aix_support.%s"%(
+        os.getpid(),), "w+b")
+
+    with contextlib.closing(fp) as fp:
+        if capture_stderr:
+            cmd = "%s >'%s' 2>&1" % (commandstring, fp.name)
+        else:
+            cmd = "%s 2>/dev/null >'%s'" % (commandstring, fp.name)
+        return fp.read() if not os.system(cmd) else None
 
 
 def _aix_tag(vrtl, bd):
@@ -36,7 +48,12 @@ def _aix_bos_rte():
     If no builddate is found give a value that will satisfy pep425 related queries
     """
     # All AIX systems to have lslpp installed in this location
-    out = subprocess.check_output(["/usr/bin/lslpp", "-Lqc", "bos.rte"])
+    # subprocess may not be available during python bootstrap
+    try:
+        import subprocess
+        out = subprocess.check_output(["/usr/bin/lslpp", "-Lqc", "bos.rte"])
+    except ImportError:
+        out = _read_cmd_output("/usr/bin/lslpp -Lqc bos.rte")
     out = out.decode("utf-8")
     out = out.strip().split(":")  # type: ignore
     _bd = int(out[-1]) if out[-1] != '' else 9988
diff --git a/contrib/tools/python3/src/Lib/_bootsubprocess.py b/contrib/tools/python3/src/Lib/_bootsubprocess.py
deleted file mode 100644
index 014782f616..0000000000
--- a/contrib/tools/python3/src/Lib/_bootsubprocess.py
+++ /dev/null
@@ -1,97 +0,0 @@
-"""
-Basic subprocess implementation for POSIX which only uses os functions. Only
-implement features required by setup.py to build C extension modules when
-subprocess is unavailable. setup.py is not used on Windows.
-"""
-import os
-
-
-# distutils.spawn used by distutils.command.build_ext
-# calls subprocess.Popen().wait()
-class Popen:
-    def __init__(self, cmd, env=None):
-        self._cmd = cmd
-        self._env = env
-        self.returncode = None
-
-    def wait(self):
-        pid = os.fork()
-        if pid == 0:
-            # Child process
-            try:
-                if self._env is not None:
-                    os.execve(self._cmd[0], self._cmd, self._env)
-                else:
-                    os.execv(self._cmd[0], self._cmd)
-            finally:
-                os._exit(1)
-        else:
-            # Parent process
-            _, status = os.waitpid(pid, 0)
-            self.returncode = os.waitstatus_to_exitcode(status)
-
-        return self.returncode
-
-
-def _check_cmd(cmd):
-    # Use regex [a-zA-Z0-9./-]+: reject empty string, space, etc.
-    safe_chars = []
-    for first, last in (("a", "z"), ("A", "Z"), ("0", "9")):
-        for ch in range(ord(first), ord(last) + 1):
-            safe_chars.append(chr(ch))
-    safe_chars.append("./-")
-    safe_chars = ''.join(safe_chars)
-
-    if isinstance(cmd, (tuple, list)):
-        check_strs = cmd
-    elif isinstance(cmd, str):
-        check_strs = [cmd]
-    else:
-        return False
-
-    for arg in check_strs:
-        if not isinstance(arg, str):
-            return False
-        if not arg:
-            # reject empty string
-            return False
-        for ch in arg:
-            if ch not in safe_chars:
-                return False
-
-    return True
-
-
-# _aix_support used by distutil.util calls subprocess.check_output()
-def check_output(cmd, **kwargs):
-    if kwargs:
-        raise NotImplementedError(repr(kwargs))
-
-    if not _check_cmd(cmd):
-        raise ValueError(f"unsupported command: {cmd!r}")
-
-    tmp_filename = "check_output.tmp"
-    if not isinstance(cmd, str):
-        cmd = " ".join(cmd)
-    cmd = f"{cmd} >{tmp_filename}"
-
-    try:
-        # system() spawns a shell
-        status = os.system(cmd)
-        exitcode = os.waitstatus_to_exitcode(status)
-        if exitcode:
-            raise ValueError(f"Command {cmd!r} returned non-zero "
-                             f"exit status {exitcode!r}")
-
-        try:
-            with open(tmp_filename, "rb") as fp:
-                stdout = fp.read()
-        except FileNotFoundError:
-            stdout = b''
-    finally:
-        try:
-            os.unlink(tmp_filename)
-        except OSError:
-            pass
-
-    return stdout
diff --git a/contrib/tools/python3/src/Lib/_collections_abc.py b/contrib/tools/python3/src/Lib/_collections_abc.py
index e96e4c3535..601107d2d8 100644
--- a/contrib/tools/python3/src/Lib/_collections_abc.py
+++ b/contrib/tools/python3/src/Lib/_collections_abc.py
@@ -6,6 +6,32 @@
 Unit tests are in test_collections.
 """
 
+############ Maintenance notes #########################################
+#
+# ABCs are different from other standard library modules in that they
+# specify compliance tests.  In general, once an ABC has been published,
+# new methods (either abstract or concrete) cannot be added.
+#
+# Though classes that inherit from an ABC would automatically receive a
+# new mixin method, registered classes would become non-compliant and
+# violate the contract promised by ``isinstance(someobj, SomeABC)``.
+#
+# Though irritating, the correct procedure for adding new abstract or
+# mixin methods is to create a new ABC as a subclass of the previous
+# ABC.  For example, union(), intersection(), and difference() cannot
+# be added to Set but could go into a new ABC that extends Set.
+#
+# Because they are so hard to change, new ABCs should have their APIs
+# carefully thought through prior to publication.
+#
+# Since ABCMeta only checks for the presence of methods, it is possible
+# to alter the signature of a method by adding optional arguments
+# or changing parameters names.  This is still a bit dubious but at
+# least it won't cause isinstance() to return an incorrect result.
+#
+#
+#######################################################################
+
 from abc import ABCMeta, abstractmethod
 import sys
 
@@ -23,7 +49,7 @@ __all__ = ["Awaitable", "Coroutine",
            "Mapping", "MutableMapping",
            "MappingView", "KeysView", "ItemsView", "ValuesView",
            "Sequence", "MutableSequence",
-           "ByteString",
+           "ByteString", "Buffer",
            ]
 
 # This module has been renamed from collections.abc to _collections_abc to
@@ -413,6 +439,21 @@ class Collection(Sized, Iterable, Container):
         return NotImplemented
 
 
+class Buffer(metaclass=ABCMeta):
+
+    __slots__ = ()
+
+    @abstractmethod
+    def __buffer__(self, flags: int, /) -> memoryview:
+        raise NotImplementedError
+
+    @classmethod
+    def __subclasshook__(cls, C):
+        if cls is Buffer:
+            return _check_methods(C, "__buffer__")
+        return NotImplemented
+
+
 class _CallableGenericAlias(GenericAlias):
     """ Represent `Callable[argtypes, resulttype]`.
 
@@ -455,15 +496,8 @@ class _CallableGenericAlias(GenericAlias):
         # rather than the default types.GenericAlias object.  Most of the
         # code is copied from typing's _GenericAlias and the builtin
         # types.GenericAlias.
-
         if not isinstance(item, tuple):
             item = (item,)
-        # A special case in PEP 612 where if X = Callable[P, int],
-        # then X[int, str] == X[[int, str]].
-        if (len(self.__parameters__) == 1
-                and _is_param_expr(self.__parameters__[0])
-                and item and not _is_param_expr(item[0])):
-            item = (item,)
 
         new_args = super().__getitem__(item).__args__
 
@@ -491,9 +525,8 @@ def _type_repr(obj):
 
     Copied from :mod:`typing` since collections.abc
     shouldn't depend on that module.
+    (Keep this roughly in sync with the typing version.)
     """
-    if isinstance(obj, GenericAlias):
-        return repr(obj)
     if isinstance(obj, type):
         if obj.__module__ == 'builtins':
             return obj.__qualname__
@@ -1038,8 +1071,27 @@ Sequence.register(str)
 Sequence.register(range)
 Sequence.register(memoryview)
 
+class _DeprecateByteStringMeta(ABCMeta):
+    def __new__(cls, name, bases, namespace, **kwargs):
+        if name != "ByteString":
+            import warnings
+
+            warnings._deprecated(
+                "collections.abc.ByteString",
+                remove=(3, 14),
+            )
+        return super().__new__(cls, name, bases, namespace, **kwargs)
+
+    def __instancecheck__(cls, instance):
+        import warnings
+
+        warnings._deprecated(
+            "collections.abc.ByteString",
+            remove=(3, 14),
+        )
+        return super().__instancecheck__(instance)
 
-class ByteString(Sequence):
+class ByteString(Sequence, metaclass=_DeprecateByteStringMeta):
     """This unifies bytes and bytearray.
 
     XXX Should add all their methods.
diff --git a/contrib/tools/python3/src/Lib/_pydatetime.py b/contrib/tools/python3/src/Lib/_pydatetime.py
new file mode 100644
index 0000000000..cd0ea900bf
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/_pydatetime.py
@@ -0,0 +1,2643 @@
+"""Concrete date/time and related types.
+
+See http://www.iana.org/time-zones/repository/tz-link.html for
+time zone and DST data sources.
+"""
+
+__all__ = ("date", "datetime", "time", "timedelta", "timezone", "tzinfo",
+           "MINYEAR", "MAXYEAR", "UTC")
+
+
+import time as _time
+import math as _math
+import sys
+from operator import index as _index
+
+def _cmp(x, y):
+    return 0 if x == y else 1 if x > y else -1
+
+def _get_class_module(self):
+    module_name = self.__class__.__module__
+    if module_name == '_pydatetime':
+        return 'datetime'
+    else:
+        return module_name
+
+MINYEAR = 1
+MAXYEAR = 9999
+_MAXORDINAL = 3652059  # date.max.toordinal()
+
+# Utility functions, adapted from Python's Demo/classes/Dates.py, which
+# also assumes the current Gregorian calendar indefinitely extended in
+# both directions.  Difference:  Dates.py calls January 1 of year 0 day
+# number 1.  The code here calls January 1 of year 1 day number 1.  This is
+# to match the definition of the "proleptic Gregorian" calendar in Dershowitz
+# and Reingold's "Calendrical Calculations", where it's the base calendar
+# for all computations.  See the book for algorithms for converting between
+# proleptic Gregorian ordinals and many other calendar systems.
+
+# -1 is a placeholder for indexing purposes.
+_DAYS_IN_MONTH = [-1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+
+_DAYS_BEFORE_MONTH = [-1]  # -1 is a placeholder for indexing purposes.
+dbm = 0
+for dim in _DAYS_IN_MONTH[1:]:
+    _DAYS_BEFORE_MONTH.append(dbm)
+    dbm += dim
+del dbm, dim
+
+def _is_leap(year):
+    "year -> 1 if leap year, else 0."
+    return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)
+
+def _days_before_year(year):
+    "year -> number of days before January 1st of year."
+    y = year - 1
+    return y*365 + y//4 - y//100 + y//400
+
+def _days_in_month(year, month):
+    "year, month -> number of days in that month in that year."
+    assert 1 <= month <= 12, month
+    if month == 2 and _is_leap(year):
+        return 29
+    return _DAYS_IN_MONTH[month]
+
+def _days_before_month(year, month):
+    "year, month -> number of days in year preceding first day of month."
+    assert 1 <= month <= 12, 'month must be in 1..12'
+    return _DAYS_BEFORE_MONTH[month] + (month > 2 and _is_leap(year))
+
+def _ymd2ord(year, month, day):
+    "year, month, day -> ordinal, considering 01-Jan-0001 as day 1."
+    assert 1 <= month <= 12, 'month must be in 1..12'
+    dim = _days_in_month(year, month)
+    assert 1 <= day <= dim, ('day must be in 1..%d' % dim)
+    return (_days_before_year(year) +
+            _days_before_month(year, month) +
+            day)
+
+_DI400Y = _days_before_year(401)    # number of days in 400 years
+_DI100Y = _days_before_year(101)    #    "    "   "   " 100   "
+_DI4Y   = _days_before_year(5)      #    "    "   "   "   4   "
+
+# A 4-year cycle has an extra leap day over what we'd get from pasting
+# together 4 single years.
+assert _DI4Y == 4 * 365 + 1
+
+# Similarly, a 400-year cycle has an extra leap day over what we'd get from
+# pasting together 4 100-year cycles.
+assert _DI400Y == 4 * _DI100Y + 1
+
+# OTOH, a 100-year cycle has one fewer leap day than we'd get from
+# pasting together 25 4-year cycles.
+assert _DI100Y == 25 * _DI4Y - 1
+
+def _ord2ymd(n):
+    "ordinal -> (year, month, day), considering 01-Jan-0001 as day 1."
+
+    # n is a 1-based index, starting at 1-Jan-1.  The pattern of leap years
+    # repeats exactly every 400 years.  The basic strategy is to find the
+    # closest 400-year boundary at or before n, then work with the offset
+    # from that boundary to n.  Life is much clearer if we subtract 1 from
+    # n first -- then the values of n at 400-year boundaries are exactly
+    # those divisible by _DI400Y:
+    #
+    #     D  M   Y            n              n-1
+    #     -- --- ----        ----------     ----------------
+    #     31 Dec -400        -_DI400Y       -_DI400Y -1
+    #      1 Jan -399         -_DI400Y +1   -_DI400Y      400-year boundary
+    #     ...
+    #     30 Dec  000        -1             -2
+    #     31 Dec  000         0             -1
+    #      1 Jan  001         1              0            400-year boundary
+    #      2 Jan  001         2              1
+    #      3 Jan  001         3              2
+    #     ...
+    #     31 Dec  400         _DI400Y        _DI400Y -1
+    #      1 Jan  401         _DI400Y +1     _DI400Y      400-year boundary
+    n -= 1
+    n400, n = divmod(n, _DI400Y)
+    year = n400 * 400 + 1   # ..., -399, 1, 401, ...
+
+    # Now n is the (non-negative) offset, in days, from January 1 of year, to
+    # the desired date.  Now compute how many 100-year cycles precede n.
+    # Note that it's possible for n100 to equal 4!  In that case 4 full
+    # 100-year cycles precede the desired day, which implies the desired
+    # day is December 31 at the end of a 400-year cycle.
+    n100, n = divmod(n, _DI100Y)
+
+    # Now compute how many 4-year cycles precede it.
+    n4, n = divmod(n, _DI4Y)
+
+    # And now how many single years.  Again n1 can be 4, and again meaning
+    # that the desired day is December 31 at the end of the 4-year cycle.
+    n1, n = divmod(n, 365)
+
+    year += n100 * 100 + n4 * 4 + n1
+    if n1 == 4 or n100 == 4:
+        assert n == 0
+        return year-1, 12, 31
+
+    # Now the year is correct, and n is the offset from January 1.  We find
+    # the month via an estimate that's either exact or one too large.
+    leapyear = n1 == 3 and (n4 != 24 or n100 == 3)
+    assert leapyear == _is_leap(year)
+    month = (n + 50) >> 5
+    preceding = _DAYS_BEFORE_MONTH[month] + (month > 2 and leapyear)
+    if preceding > n:  # estimate is too large
+        month -= 1
+        preceding -= _DAYS_IN_MONTH[month] + (month == 2 and leapyear)
+    n -= preceding
+    assert 0 <= n < _days_in_month(year, month)
+
+    # Now the year and month are correct, and n is the offset from the
+    # start of that month:  we're done!
+    return year, month, n+1
+
+# Month and day names.  For localized versions, see the calendar module.
+_MONTHNAMES = [None, "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+                     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
+_DAYNAMES = [None, "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
+
+
+def _build_struct_time(y, m, d, hh, mm, ss, dstflag):
+    wday = (_ymd2ord(y, m, d) + 6) % 7
+    dnum = _days_before_month(y, m) + d
+    return _time.struct_time((y, m, d, hh, mm, ss, wday, dnum, dstflag))
+
+def _format_time(hh, mm, ss, us, timespec='auto'):
+    specs = {
+        'hours': '{:02d}',
+        'minutes': '{:02d}:{:02d}',
+        'seconds': '{:02d}:{:02d}:{:02d}',
+        'milliseconds': '{:02d}:{:02d}:{:02d}.{:03d}',
+        'microseconds': '{:02d}:{:02d}:{:02d}.{:06d}'
+    }
+
+    if timespec == 'auto':
+        # Skip trailing microseconds when us==0.
+        timespec = 'microseconds' if us else 'seconds'
+    elif timespec == 'milliseconds':
+        us //= 1000
+    try:
+        fmt = specs[timespec]
+    except KeyError:
+        raise ValueError('Unknown timespec value')
+    else:
+        return fmt.format(hh, mm, ss, us)
+
+def _format_offset(off, sep=':'):
+    s = ''
+    if off is not None:
+        if off.days < 0:
+            sign = "-"
+            off = -off
+        else:
+            sign = "+"
+        hh, mm = divmod(off, timedelta(hours=1))
+        mm, ss = divmod(mm, timedelta(minutes=1))
+        s += "%s%02d%s%02d" % (sign, hh, sep, mm)
+        if ss or ss.microseconds:
+            s += "%s%02d" % (sep, ss.seconds)
+
+            if ss.microseconds:
+                s += '.%06d' % ss.microseconds
+    return s
+
+# Correctly substitute for %z and %Z escapes in strftime formats.
+def _wrap_strftime(object, format, timetuple):
+    # Don't call utcoffset() or tzname() unless actually needed.
+    freplace = None  # the string to use for %f
+    zreplace = None  # the string to use for %z
+    colonzreplace = None  # the string to use for %:z
+    Zreplace = None  # the string to use for %Z
+
+    # Scan format for %z, %:z and %Z escapes, replacing as needed.
+    newformat = []
+    push = newformat.append
+    i, n = 0, len(format)
+    while i < n:
+        ch = format[i]
+        i += 1
+        if ch == '%':
+            if i < n:
+                ch = format[i]
+                i += 1
+                if ch == 'f':
+                    if freplace is None:
+                        freplace = '%06d' % getattr(object,
+                                                    'microsecond', 0)
+                    newformat.append(freplace)
+                elif ch == 'z':
+                    if zreplace is None:
+                        if hasattr(object, "utcoffset"):
+                            zreplace = _format_offset(object.utcoffset(), sep="")
+                        else:
+                            zreplace = ""
+                    assert '%' not in zreplace
+                    newformat.append(zreplace)
+                elif ch == ':':
+                    if i < n:
+                        ch2 = format[i]
+                        i += 1
+                        if ch2 == 'z':
+                            if colonzreplace is None:
+                                if hasattr(object, "utcoffset"):
+                                    colonzreplace = _format_offset(object.utcoffset(), sep=":")
+                                else:
+                                    colonzreplace = ""
+                            assert '%' not in colonzreplace
+                            newformat.append(colonzreplace)
+                        else:
+                            push('%')
+                            push(ch)
+                            push(ch2)
+                elif ch == 'Z':
+                    if Zreplace is None:
+                        Zreplace = ""
+                        if hasattr(object, "tzname"):
+                            s = object.tzname()
+                            if s is not None:
+                                # strftime is going to have at this: escape %
+                                Zreplace = s.replace('%', '%%')
+                    newformat.append(Zreplace)
+                else:
+                    push('%')
+                    push(ch)
+            else:
+                push('%')
+        else:
+            push(ch)
+    newformat = "".join(newformat)
+    return _time.strftime(newformat, timetuple)
+
+# Helpers for parsing the result of isoformat()
+def _is_ascii_digit(c):
+    return c in "0123456789"
+
+def _find_isoformat_datetime_separator(dtstr):
+    # See the comment in _datetimemodule.c:_find_isoformat_datetime_separator
+    len_dtstr = len(dtstr)
+    if len_dtstr == 7:
+        return 7
+
+    assert len_dtstr > 7
+    date_separator = "-"
+    week_indicator = "W"
+
+    if dtstr[4] == date_separator:
+        if dtstr[5] == week_indicator:
+            if len_dtstr < 8:
+                raise ValueError("Invalid ISO string")
+            if len_dtstr > 8 and dtstr[8] == date_separator:
+                if len_dtstr == 9:
+                    raise ValueError("Invalid ISO string")
+                if len_dtstr > 10 and _is_ascii_digit(dtstr[10]):
+                    # This is as far as we need to resolve the ambiguity for
+                    # the moment - if we have YYYY-Www-##, the separator is
+                    # either a hyphen at 8 or a number at 10.
+                    #
+                    # We'll assume it's a hyphen at 8 because it's way more
+                    # likely that someone will use a hyphen as a separator than
+                    # a number, but at this point it's really best effort
+                    # because this is an extension of the spec anyway.
+                    # TODO(pganssle): Document this
+                    return 8
+                return 10
+            else:
+                # YYYY-Www (8)
+                return 8
+        else:
+            # YYYY-MM-DD (10)
+            return 10
+    else:
+        if dtstr[4] == week_indicator:
+            # YYYYWww (7) or YYYYWwwd (8)
+            idx = 7
+            while idx < len_dtstr:
+                if not _is_ascii_digit(dtstr[idx]):
+                    break
+                idx += 1
+
+            if idx < 9:
+                return idx
+
+            if idx % 2 == 0:
+                # If the index of the last number is even, it's YYYYWwwd
+                return 7
+            else:
+                return 8
+        else:
+            # YYYYMMDD (8)
+            return 8
+
+
+def _parse_isoformat_date(dtstr):
+    # It is assumed that this is an ASCII-only string of lengths 7, 8 or 10,
+    # see the comment on Modules/_datetimemodule.c:_find_isoformat_datetime_separator
+    assert len(dtstr) in (7, 8, 10)
+    year = int(dtstr[0:4])
+    has_sep = dtstr[4] == '-'
+
+    pos = 4 + has_sep
+    if dtstr[pos:pos + 1] == "W":
+        # YYYY-?Www-?D?
+        pos += 1
+        weekno = int(dtstr[pos:pos + 2])
+        pos += 2
+
+        dayno = 1
+        if len(dtstr) > pos:
+            if (dtstr[pos:pos + 1] == '-') != has_sep:
+                raise ValueError("Inconsistent use of dash separator")
+
+            pos += has_sep
+
+            dayno = int(dtstr[pos:pos + 1])
+
+        return list(_isoweek_to_gregorian(year, weekno, dayno))
+    else:
+        month = int(dtstr[pos:pos + 2])
+        pos += 2
+        if (dtstr[pos:pos + 1] == "-") != has_sep:
+            raise ValueError("Inconsistent use of dash separator")
+
+        pos += has_sep
+        day = int(dtstr[pos:pos + 2])
+
+        return [year, month, day]
+
+
+_FRACTION_CORRECTION = [100000, 10000, 1000, 100, 10]
+
+
+def _parse_hh_mm_ss_ff(tstr):
+    # Parses things of the form HH[:?MM[:?SS[{.,}fff[fff]]]]
+    len_str = len(tstr)
+
+    time_comps = [0, 0, 0, 0]
+    pos = 0
+    for comp in range(0, 3):
+        if (len_str - pos) < 2:
+            raise ValueError("Incomplete time component")
+
+        time_comps[comp] = int(tstr[pos:pos+2])
+
+        pos += 2
+        next_char = tstr[pos:pos+1]
+
+        if comp == 0:
+            has_sep = next_char == ':'
+
+        if not next_char or comp >= 2:
+            break
+
+        if has_sep and next_char != ':':
+            raise ValueError("Invalid time separator: %c" % next_char)
+
+        pos += has_sep
+
+    if pos < len_str:
+        if tstr[pos] not in '.,':
+            raise ValueError("Invalid microsecond component")
+        else:
+            pos += 1
+
+            len_remainder = len_str - pos
+
+            if len_remainder >= 6:
+                to_parse = 6
+            else:
+                to_parse = len_remainder
+
+            time_comps[3] = int(tstr[pos:(pos+to_parse)])
+            if to_parse < 6:
+                time_comps[3] *= _FRACTION_CORRECTION[to_parse-1]
+            if (len_remainder > to_parse
+                    and not all(map(_is_ascii_digit, tstr[(pos+to_parse):]))):
+                raise ValueError("Non-digit values in unparsed fraction")
+
+    return time_comps
+
+def _parse_isoformat_time(tstr):
+    # Format supported is HH[:MM[:SS[.fff[fff]]]][+HH:MM[:SS[.ffffff]]]
+    len_str = len(tstr)
+    if len_str < 2:
+        raise ValueError("Isoformat time too short")
+
+    # This is equivalent to re.search('[+-Z]', tstr), but faster
+    tz_pos = (tstr.find('-') + 1 or tstr.find('+') + 1 or tstr.find('Z') + 1)
+    timestr = tstr[:tz_pos-1] if tz_pos > 0 else tstr
+
+    time_comps = _parse_hh_mm_ss_ff(timestr)
+
+    tzi = None
+    if tz_pos == len_str and tstr[-1] == 'Z':
+        tzi = timezone.utc
+    elif tz_pos > 0:
+        tzstr = tstr[tz_pos:]
+
+        # Valid time zone strings are:
+        # HH                  len: 2
+        # HHMM                len: 4
+        # HH:MM               len: 5
+        # HHMMSS              len: 6
+        # HHMMSS.f+           len: 7+
+        # HH:MM:SS            len: 8
+        # HH:MM:SS.f+         len: 10+
+
+        if len(tzstr) in (0, 1, 3):
+            raise ValueError("Malformed time zone string")
+
+        tz_comps = _parse_hh_mm_ss_ff(tzstr)
+
+        if all(x == 0 for x in tz_comps):
+            tzi = timezone.utc
+        else:
+            tzsign = -1 if tstr[tz_pos - 1] == '-' else 1
+
+            td = timedelta(hours=tz_comps[0], minutes=tz_comps[1],
+                           seconds=tz_comps[2], microseconds=tz_comps[3])
+
+            tzi = timezone(tzsign * td)
+
+    time_comps.append(tzi)
+
+    return time_comps
+
+# tuple[int, int, int] -> tuple[int, int, int] version of date.fromisocalendar
+def _isoweek_to_gregorian(year, week, day):
+    # Year is bounded this way because 9999-12-31 is (9999, 52, 5)
+    if not MINYEAR <= year <= MAXYEAR:
+        raise ValueError(f"Year is out of range: {year}")
+
+    if not 0 < week < 53:
+        out_of_range = True
+
+        if week == 53:
+            # ISO years have 53 weeks in them on years starting with a
+            # Thursday and leap years starting on a Wednesday
+            first_weekday = _ymd2ord(year, 1, 1) % 7
+            if (first_weekday == 4 or (first_weekday == 3 and
+                                       _is_leap(year))):
+                out_of_range = False
+
+        if out_of_range:
+            raise ValueError(f"Invalid week: {week}")
+
+    if not 0 < day < 8:
+        raise ValueError(f"Invalid weekday: {day} (range is [1, 7])")
+
+    # Now compute the offset from (Y, 1, 1) in days:
+    day_offset = (week - 1) * 7 + (day - 1)
+
+    # Calculate the ordinal day for monday, week 1
+    day_1 = _isoweek1monday(year)
+    ord_day = day_1 + day_offset
+
+    return _ord2ymd(ord_day)
+
+
+# Just raise TypeError if the arg isn't None or a string.
+def _check_tzname(name):
+    if name is not None and not isinstance(name, str):
+        raise TypeError("tzinfo.tzname() must return None or string, "
+                        "not '%s'" % type(name))
+
+# name is the offset-producing method, "utcoffset" or "dst".
+# offset is what it returned.
+# If offset isn't None or timedelta, raises TypeError.
+# If offset is None, returns None.
+# Else offset is checked for being in range.
+# If it is, its integer value is returned.  Else ValueError is raised.
+def _check_utc_offset(name, offset):
+    assert name in ("utcoffset", "dst")
+    if offset is None:
+        return
+    if not isinstance(offset, timedelta):
+        raise TypeError("tzinfo.%s() must return None "
+                        "or timedelta, not '%s'" % (name, type(offset)))
+    if not -timedelta(1) < offset < timedelta(1):
+        raise ValueError("%s()=%s, must be strictly between "
+                         "-timedelta(hours=24) and timedelta(hours=24)" %
+                         (name, offset))
+
+def _check_date_fields(year, month, day):
+    year = _index(year)
+    month = _index(month)
+    day = _index(day)
+    if not MINYEAR <= year <= MAXYEAR:
+        raise ValueError('year must be in %d..%d' % (MINYEAR, MAXYEAR), year)
+    if not 1 <= month <= 12:
+        raise ValueError('month must be in 1..12', month)
+    dim = _days_in_month(year, month)
+    if not 1 <= day <= dim:
+        raise ValueError('day must be in 1..%d' % dim, day)
+    return year, month, day
+
+def _check_time_fields(hour, minute, second, microsecond, fold):
+    hour = _index(hour)
+    minute = _index(minute)
+    second = _index(second)
+    microsecond = _index(microsecond)
+    if not 0 <= hour <= 23:
+        raise ValueError('hour must be in 0..23', hour)
+    if not 0 <= minute <= 59:
+        raise ValueError('minute must be in 0..59', minute)
+    if not 0 <= second <= 59:
+        raise ValueError('second must be in 0..59', second)
+    if not 0 <= microsecond <= 999999:
+        raise ValueError('microsecond must be in 0..999999', microsecond)
+    if fold not in (0, 1):
+        raise ValueError('fold must be either 0 or 1', fold)
+    return hour, minute, second, microsecond, fold
+
+def _check_tzinfo_arg(tz):
+    if tz is not None and not isinstance(tz, tzinfo):
+        raise TypeError("tzinfo argument must be None or of a tzinfo subclass")
+
+def _cmperror(x, y):
+    raise TypeError("can't compare '%s' to '%s'" % (
+                    type(x).__name__, type(y).__name__))
+
+def _divide_and_round(a, b):
+    """divide a by b and round result to the nearest integer
+
+    When the ratio is exactly half-way between two integers,
+    the even integer is returned.
+    """
+    # Based on the reference implementation for divmod_near
+    # in Objects/longobject.c.
+    q, r = divmod(a, b)
+    # round up if either r / b > 0.5, or r / b == 0.5 and q is odd.
+    # The expression r / b > 0.5 is equivalent to 2 * r > b if b is
+    # positive, 2 * r < b if b negative.
+    r *= 2
+    greater_than_half = r > b if b > 0 else r < b
+    if greater_than_half or r == b and q % 2 == 1:
+        q += 1
+
+    return q
+
+
+class timedelta:
+    """Represent the difference between two datetime objects.
+
+    Supported operators:
+
+    - add, subtract timedelta
+    - unary plus, minus, abs
+    - compare to timedelta
+    - multiply, divide by int
+
+    In addition, datetime supports subtraction of two datetime objects
+    returning a timedelta, and addition or subtraction of a datetime
+    and a timedelta giving a datetime.
+
+    Representation: (days, seconds, microseconds).
+    """
+    # The representation of (days, seconds, microseconds) was chosen
+    # arbitrarily; the exact rationale originally specified in the docstring
+    # was "Because I felt like it."
+
+    __slots__ = '_days', '_seconds', '_microseconds', '_hashcode'
+
+    def __new__(cls, days=0, seconds=0, microseconds=0,
+                milliseconds=0, minutes=0, hours=0, weeks=0):
+        # Doing this efficiently and accurately in C is going to be difficult
+        # and error-prone, due to ubiquitous overflow possibilities, and that
+        # C double doesn't have enough bits of precision to represent
+        # microseconds over 10K years faithfully.  The code here tries to make
+        # explicit where go-fast assumptions can be relied on, in order to
+        # guide the C implementation; it's way more convoluted than speed-
+        # ignoring auto-overflow-to-long idiomatic Python could be.
+
+        # XXX Check that all inputs are ints or floats.
+
+        # Final values, all integer.
+        # s and us fit in 32-bit signed ints; d isn't bounded.
+        d = s = us = 0
+
+        # Normalize everything to days, seconds, microseconds.
+        days += weeks*7
+        seconds += minutes*60 + hours*3600
+        microseconds += milliseconds*1000
+
+        # Get rid of all fractions, and normalize s and us.
+        # Take a deep breath <wink>.
+        if isinstance(days, float):
+            dayfrac, days = _math.modf(days)
+            daysecondsfrac, daysecondswhole = _math.modf(dayfrac * (24.*3600.))
+            assert daysecondswhole == int(daysecondswhole)  # can't overflow
+            s = int(daysecondswhole)
+            assert days == int(days)
+            d = int(days)
+        else:
+            daysecondsfrac = 0.0
+            d = days
+        assert isinstance(daysecondsfrac, float)
+        assert abs(daysecondsfrac) <= 1.0
+        assert isinstance(d, int)
+        assert abs(s) <= 24 * 3600
+        # days isn't referenced again before redefinition
+
+        if isinstance(seconds, float):
+            secondsfrac, seconds = _math.modf(seconds)
+            assert seconds == int(seconds)
+            seconds = int(seconds)
+            secondsfrac += daysecondsfrac
+            assert abs(secondsfrac) <= 2.0
+        else:
+            secondsfrac = daysecondsfrac
+        # daysecondsfrac isn't referenced again
+        assert isinstance(secondsfrac, float)
+        assert abs(secondsfrac) <= 2.0
+
+        assert isinstance(seconds, int)
+        days, seconds = divmod(seconds, 24*3600)
+        d += days
+        s += int(seconds)    # can't overflow
+        assert isinstance(s, int)
+        assert abs(s) <= 2 * 24 * 3600
+        # seconds isn't referenced again before redefinition
+
+        usdouble = secondsfrac * 1e6
+        assert abs(usdouble) < 2.1e6    # exact value not critical
+        # secondsfrac isn't referenced again
+
+        if isinstance(microseconds, float):
+            microseconds = round(microseconds + usdouble)
+            seconds, microseconds = divmod(microseconds, 1000000)
+            days, seconds = divmod(seconds, 24*3600)
+            d += days
+            s += seconds
+        else:
+            microseconds = int(microseconds)
+            seconds, microseconds = divmod(microseconds, 1000000)
+            days, seconds = divmod(seconds, 24*3600)
+            d += days
+            s += seconds
+            microseconds = round(microseconds + usdouble)
+        assert isinstance(s, int)
+        assert isinstance(microseconds, int)
+        assert abs(s) <= 3 * 24 * 3600
+        assert abs(microseconds) < 3.1e6
+
+        # Just a little bit of carrying possible for microseconds and seconds.
+        seconds, us = divmod(microseconds, 1000000)
+        s += seconds
+        days, s = divmod(s, 24*3600)
+        d += days
+
+        assert isinstance(d, int)
+        assert isinstance(s, int) and 0 <= s < 24*3600
+        assert isinstance(us, int) and 0 <= us < 1000000
+
+        if abs(d) > 999999999:
+            raise OverflowError("timedelta # of days is too large: %d" % d)
+
+        self = object.__new__(cls)
+        self._days = d
+        self._seconds = s
+        self._microseconds = us
+        self._hashcode = -1
+        return self
+
+    def __repr__(self):
+        args = []
+        if self._days:
+            args.append("days=%d" % self._days)
+        if self._seconds:
+            args.append("seconds=%d" % self._seconds)
+        if self._microseconds:
+            args.append("microseconds=%d" % self._microseconds)
+        if not args:
+            args.append('0')
+        return "%s.%s(%s)" % (_get_class_module(self),
+                              self.__class__.__qualname__,
+                              ', '.join(args))
+
+    def __str__(self):
+        mm, ss = divmod(self._seconds, 60)
+        hh, mm = divmod(mm, 60)
+        s = "%d:%02d:%02d" % (hh, mm, ss)
+        if self._days:
+            def plural(n):
+                return n, abs(n) != 1 and "s" or ""
+            s = ("%d day%s, " % plural(self._days)) + s
+        if self._microseconds:
+            s = s + ".%06d" % self._microseconds
+        return s
+
+    def total_seconds(self):
+        """Total seconds in the duration."""
+        return ((self.days * 86400 + self.seconds) * 10**6 +
+                self.microseconds) / 10**6
+
+    # Read-only field accessors
+    @property
+    def days(self):
+        """days"""
+        return self._days
+
+    @property
+    def seconds(self):
+        """seconds"""
+        return self._seconds
+
+    @property
+    def microseconds(self):
+        """microseconds"""
+        return self._microseconds
+
+    def __add__(self, other):
+        if isinstance(other, timedelta):
+            # for CPython compatibility, we cannot use
+            # our __class__ here, but need a real timedelta
+            return timedelta(self._days + other._days,
+                             self._seconds + other._seconds,
+                             self._microseconds + other._microseconds)
+        return NotImplemented
+
+    __radd__ = __add__
+
+    def __sub__(self, other):
+        if isinstance(other, timedelta):
+            # for CPython compatibility, we cannot use
+            # our __class__ here, but need a real timedelta
+            return timedelta(self._days - other._days,
+                             self._seconds - other._seconds,
+                             self._microseconds - other._microseconds)
+        return NotImplemented
+
+    def __rsub__(self, other):
+        if isinstance(other, timedelta):
+            return -self + other
+        return NotImplemented
+
+    def __neg__(self):
+        # for CPython compatibility, we cannot use
+        # our __class__ here, but need a real timedelta
+        return timedelta(-self._days,
+                         -self._seconds,
+                         -self._microseconds)
+
+    def __pos__(self):
+        return self
+
+    def __abs__(self):
+        if self._days < 0:
+            return -self
+        else:
+            return self
+
+    def __mul__(self, other):
+        if isinstance(other, int):
+            # for CPython compatibility, we cannot use
+            # our __class__ here, but need a real timedelta
+            return timedelta(self._days * other,
+                             self._seconds * other,
+                             self._microseconds * other)
+        if isinstance(other, float):
+            usec = self._to_microseconds()
+            a, b = other.as_integer_ratio()
+            return timedelta(0, 0, _divide_and_round(usec * a, b))
+        return NotImplemented
+
+    __rmul__ = __mul__
+
+    def _to_microseconds(self):
+        return ((self._days * (24*3600) + self._seconds) * 1000000 +
+                self._microseconds)
+
+    def __floordiv__(self, other):
+        if not isinstance(other, (int, timedelta)):
+            return NotImplemented
+        usec = self._to_microseconds()
+        if isinstance(other, timedelta):
+            return usec // other._to_microseconds()
+        if isinstance(other, int):
+            return timedelta(0, 0, usec // other)
+
+    def __truediv__(self, other):
+        if not isinstance(other, (int, float, timedelta)):
+            return NotImplemented
+        usec = self._to_microseconds()
+        if isinstance(other, timedelta):
+            return usec / other._to_microseconds()
+        if isinstance(other, int):
+            return timedelta(0, 0, _divide_and_round(usec, other))
+        if isinstance(other, float):
+            a, b = other.as_integer_ratio()
+            return timedelta(0, 0, _divide_and_round(b * usec, a))
+
+    def __mod__(self, other):
+        if isinstance(other, timedelta):
+            r = self._to_microseconds() % other._to_microseconds()
+            return timedelta(0, 0, r)
+        return NotImplemented
+
+    def __divmod__(self, other):
+        if isinstance(other, timedelta):
+            q, r = divmod(self._to_microseconds(),
+                          other._to_microseconds())
+            return q, timedelta(0, 0, r)
+        return NotImplemented
+
+    # Comparisons of timedelta objects with other.
+
+    def __eq__(self, other):
+        if isinstance(other, timedelta):
+            return self._cmp(other) == 0
+        else:
+            return NotImplemented
+
+    def __le__(self, other):
+        if isinstance(other, timedelta):
+            return self._cmp(other) <= 0
+        else:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if isinstance(other, timedelta):
+            return self._cmp(other) < 0
+        else:
+            return NotImplemented
+
+    def __ge__(self, other):
+        if isinstance(other, timedelta):
+            return self._cmp(other) >= 0
+        else:
+            return NotImplemented
+
+    def __gt__(self, other):
+        if isinstance(other, timedelta):
+            return self._cmp(other) > 0
+        else:
+            return NotImplemented
+
+    def _cmp(self, other):
+        assert isinstance(other, timedelta)
+        return _cmp(self._getstate(), other._getstate())
+
+    def __hash__(self):
+        if self._hashcode == -1:
+            self._hashcode = hash(self._getstate())
+        return self._hashcode
+
+    def __bool__(self):
+        return (self._days != 0 or
+                self._seconds != 0 or
+                self._microseconds != 0)
+
+    # Pickle support.
+
+    def _getstate(self):
+        return (self._days, self._seconds, self._microseconds)
+
+    def __reduce__(self):
+        return (self.__class__, self._getstate())
+
+timedelta.min = timedelta(-999999999)
+timedelta.max = timedelta(days=999999999, hours=23, minutes=59, seconds=59,
+                          microseconds=999999)
+timedelta.resolution = timedelta(microseconds=1)
+
+class date:
+    """Concrete date type.
+
+    Constructors:
+
+    __new__()
+    fromtimestamp()
+    today()
+    fromordinal()
+
+    Operators:
+
+    __repr__, __str__
+    __eq__, __le__, __lt__, __ge__, __gt__, __hash__
+    __add__, __radd__, __sub__ (add/radd only with timedelta arg)
+
+    Methods:
+
+    timetuple()
+    toordinal()
+    weekday()
+    isoweekday(), isocalendar(), isoformat()
+    ctime()
+    strftime()
+
+    Properties (readonly):
+    year, month, day
+    """
+    __slots__ = '_year', '_month', '_day', '_hashcode'
+
+    def __new__(cls, year, month=None, day=None):
+        """Constructor.
+
+        Arguments:
+
+        year, month, day (required, base 1)
+        """
+        if (month is None and
+            isinstance(year, (bytes, str)) and len(year) == 4 and
+            1 <= ord(year[2:3]) <= 12):
+            # Pickle support
+            if isinstance(year, str):
+                try:
+                    year = year.encode('latin1')
+                except UnicodeEncodeError:
+                    # More informative error message.
+                    raise ValueError(
+                        "Failed to encode latin1 string when unpickling "
+                        "a date object. "
+                        "pickle.load(data, encoding='latin1') is assumed.")
+            self = object.__new__(cls)
+            self.__setstate(year)
+            self._hashcode = -1
+            return self
+        year, month, day = _check_date_fields(year, month, day)
+        self = object.__new__(cls)
+        self._year = year
+        self._month = month
+        self._day = day
+        self._hashcode = -1
+        return self
+
+    # Additional constructors
+
+    @classmethod
+    def fromtimestamp(cls, t):
+        "Construct a date from a POSIX timestamp (like time.time())."
+        y, m, d, hh, mm, ss, weekday, jday, dst = _time.localtime(t)
+        return cls(y, m, d)
+
+    @classmethod
+    def today(cls):
+        "Construct a date from time.time()."
+        t = _time.time()
+        return cls.fromtimestamp(t)
+
+    @classmethod
+    def fromordinal(cls, n):
+        """Construct a date from a proleptic Gregorian ordinal.
+
+        January 1 of year 1 is day 1.  Only the year, month and day are
+        non-zero in the result.
+        """
+        y, m, d = _ord2ymd(n)
+        return cls(y, m, d)
+
+    @classmethod
+    def fromisoformat(cls, date_string):
+        """Construct a date from a string in ISO 8601 format."""
+        if not isinstance(date_string, str):
+            raise TypeError('fromisoformat: argument must be str')
+
+        if len(date_string) not in (7, 8, 10):
+            raise ValueError(f'Invalid isoformat string: {date_string!r}')
+
+        try:
+            return cls(*_parse_isoformat_date(date_string))
+        except Exception:
+            raise ValueError(f'Invalid isoformat string: {date_string!r}')
+
+    @classmethod
+    def fromisocalendar(cls, year, week, day):
+        """Construct a date from the ISO year, week number and weekday.
+
+        This is the inverse of the date.isocalendar() function"""
+        return cls(*_isoweek_to_gregorian(year, week, day))
+
+    # Conversions to string
+
+    def __repr__(self):
+        """Convert to formal string, for repr().
+
+        >>> d = date(2010, 1, 1)
+        >>> repr(d)
+        'datetime.date(2010, 1, 1)'
+        """
+        return "%s.%s(%d, %d, %d)" % (_get_class_module(self),
+                                      self.__class__.__qualname__,
+                                      self._year,
+                                      self._month,
+                                      self._day)
+    # XXX These shouldn't depend on time.localtime(), because that
+    # clips the usable dates to [1970 .. 2038).  At least ctime() is
+    # easily done without using strftime() -- that's better too because
+    # strftime("%c", ...) is locale specific.
+
+
+    def ctime(self):
+        "Return ctime() style string."
+        weekday = self.toordinal() % 7 or 7
+        return "%s %s %2d 00:00:00 %04d" % (
+            _DAYNAMES[weekday],
+            _MONTHNAMES[self._month],
+            self._day, self._year)
+
+    def strftime(self, format):
+        """
+        Format using strftime().
+
+        Example: "%d/%m/%Y, %H:%M:%S"
+        """
+        return _wrap_strftime(self, format, self.timetuple())
+
+    def __format__(self, fmt):
+        if not isinstance(fmt, str):
+            raise TypeError("must be str, not %s" % type(fmt).__name__)
+        if len(fmt) != 0:
+            return self.strftime(fmt)
+        return str(self)
+
+    def isoformat(self):
+        """Return the date formatted according to ISO.
+
+        This is 'YYYY-MM-DD'.
+
+        References:
+        - http://www.w3.org/TR/NOTE-datetime
+        - http://www.cl.cam.ac.uk/~mgk25/iso-time.html
+        """
+        return "%04d-%02d-%02d" % (self._year, self._month, self._day)
+
+    __str__ = isoformat
+
+    # Read-only field accessors
+    @property
+    def year(self):
+        """year (1-9999)"""
+        return self._year
+
+    @property
+    def month(self):
+        """month (1-12)"""
+        return self._month
+
+    @property
+    def day(self):
+        """day (1-31)"""
+        return self._day
+
+    # Standard conversions, __eq__, __le__, __lt__, __ge__, __gt__,
+    # __hash__ (and helpers)
+
+    def timetuple(self):
+        "Return local time tuple compatible with time.localtime()."
+        return _build_struct_time(self._year, self._month, self._day,
+                                  0, 0, 0, -1)
+
+    def toordinal(self):
+        """Return proleptic Gregorian ordinal for the year, month and day.
+
+        January 1 of year 1 is day 1.  Only the year, month and day values
+        contribute to the result.
+        """
+        return _ymd2ord(self._year, self._month, self._day)
+
+    def replace(self, year=None, month=None, day=None):
+        """Return a new date with new values for the specified fields."""
+        if year is None:
+            year = self._year
+        if month is None:
+            month = self._month
+        if day is None:
+            day = self._day
+        return type(self)(year, month, day)
+
+    # Comparisons of date objects with other.
+
+    def __eq__(self, other):
+        if isinstance(other, date):
+            return self._cmp(other) == 0
+        return NotImplemented
+
+    def __le__(self, other):
+        if isinstance(other, date):
+            return self._cmp(other) <= 0
+        return NotImplemented
+
+    def __lt__(self, other):
+        if isinstance(other, date):
+            return self._cmp(other) < 0
+        return NotImplemented
+
+    def __ge__(self, other):
+        if isinstance(other, date):
+            return self._cmp(other) >= 0
+        return NotImplemented
+
+    def __gt__(self, other):
+        if isinstance(other, date):
+            return self._cmp(other) > 0
+        return NotImplemented
+
+    def _cmp(self, other):
+        assert isinstance(other, date)
+        y, m, d = self._year, self._month, self._day
+        y2, m2, d2 = other._year, other._month, other._day
+        return _cmp((y, m, d), (y2, m2, d2))
+
+    def __hash__(self):
+        "Hash."
+        if self._hashcode == -1:
+            self._hashcode = hash(self._getstate())
+        return self._hashcode
+
+    # Computations
+
+    def __add__(self, other):
+        "Add a date to a timedelta."
+        if isinstance(other, timedelta):
+            o = self.toordinal() + other.days
+            if 0 < o <= _MAXORDINAL:
+                return type(self).fromordinal(o)
+            raise OverflowError("result out of range")
+        return NotImplemented
+
+    __radd__ = __add__
+
+    def __sub__(self, other):
+        """Subtract two dates, or a date and a timedelta."""
+        if isinstance(other, timedelta):
+            return self + timedelta(-other.days)
+        if isinstance(other, date):
+            days1 = self.toordinal()
+            days2 = other.toordinal()
+            return timedelta(days1 - days2)
+        return NotImplemented
+
+    def weekday(self):
+        "Return day of the week, where Monday == 0 ... Sunday == 6."
+        return (self.toordinal() + 6) % 7
+
+    # Day-of-the-week and week-of-the-year, according to ISO
+
+    def isoweekday(self):
+        "Return day of the week, where Monday == 1 ... Sunday == 7."
+        # 1-Jan-0001 is a Monday
+        return self.toordinal() % 7 or 7
+
+    def isocalendar(self):
+        """Return a named tuple containing ISO year, week number, and weekday.
+
+        The first ISO week of the year is the (Mon-Sun) week
+        containing the year's first Thursday; everything else derives
+        from that.
+
+        The first week is 1; Monday is 1 ... Sunday is 7.
+
+        ISO calendar algorithm taken from
+        http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
+        (used with permission)
+        """
+        year = self._year
+        week1monday = _isoweek1monday(year)
+        today = _ymd2ord(self._year, self._month, self._day)
+        # Internally, week and day have origin 0
+        week, day = divmod(today - week1monday, 7)
+        if week < 0:
+            year -= 1
+            week1monday = _isoweek1monday(year)
+            week, day = divmod(today - week1monday, 7)
+        elif week >= 52:
+            if today >= _isoweek1monday(year+1):
+                year += 1
+                week = 0
+        return _IsoCalendarDate(year, week+1, day+1)
+
+    # Pickle support.
+
+    def _getstate(self):
+        yhi, ylo = divmod(self._year, 256)
+        return bytes([yhi, ylo, self._month, self._day]),
+
+    def __setstate(self, string):
+        yhi, ylo, self._month, self._day = string
+        self._year = yhi * 256 + ylo
+
+    def __reduce__(self):
+        return (self.__class__, self._getstate())
+
+_date_class = date  # so functions w/ args named "date" can get at the class
+
+date.min = date(1, 1, 1)
+date.max = date(9999, 12, 31)
+date.resolution = timedelta(days=1)
+
+
+class tzinfo:
+    """Abstract base class for time zone info classes.
+
+    Subclasses must override the tzname(), utcoffset() and dst() methods.
+    """
+    __slots__ = ()
+
+    def tzname(self, dt):
+        "datetime -> string name of time zone."
+        raise NotImplementedError("tzinfo subclass must override tzname()")
+
+    def utcoffset(self, dt):
+        "datetime -> timedelta, positive for east of UTC, negative for west of UTC"
+        raise NotImplementedError("tzinfo subclass must override utcoffset()")
+
+    def dst(self, dt):
+        """datetime -> DST offset as timedelta, positive for east of UTC.
+
+        Return 0 if DST not in effect.  utcoffset() must include the DST
+        offset.
+        """
+        raise NotImplementedError("tzinfo subclass must override dst()")
+
+    def fromutc(self, dt):
+        "datetime in UTC -> datetime in local time."
+
+        if not isinstance(dt, datetime):
+            raise TypeError("fromutc() requires a datetime argument")
+        if dt.tzinfo is not self:
+            raise ValueError("dt.tzinfo is not self")
+
+        dtoff = dt.utcoffset()
+        if dtoff is None:
+            raise ValueError("fromutc() requires a non-None utcoffset() "
+                             "result")
+
+        # See the long comment block at the end of this file for an
+        # explanation of this algorithm.
+        dtdst = dt.dst()
+        if dtdst is None:
+            raise ValueError("fromutc() requires a non-None dst() result")
+        delta = dtoff - dtdst
+        if delta:
+            dt += delta
+            dtdst = dt.dst()
+            if dtdst is None:
+                raise ValueError("fromutc(): dt.dst gave inconsistent "
+                                 "results; cannot convert")
+        return dt + dtdst
+
+    # Pickle support.
+
+    def __reduce__(self):
+        getinitargs = getattr(self, "__getinitargs__", None)
+        if getinitargs:
+            args = getinitargs()
+        else:
+            args = ()
+        return (self.__class__, args, self.__getstate__())
+
+
+class IsoCalendarDate(tuple):
+
+    def __new__(cls, year, week, weekday, /):
+        return super().__new__(cls, (year, week, weekday))
+
+    @property
+    def year(self):
+        return self[0]
+
+    @property
+    def week(self):
+        return self[1]
+
+    @property
+    def weekday(self):
+        return self[2]
+
+    def __reduce__(self):
+        # This code is intended to pickle the object without making the
+        # class public. See https://bugs.python.org/msg352381
+        return (tuple, (tuple(self),))
+
+    def __repr__(self):
+        return (f'{self.__class__.__name__}'
+                f'(year={self[0]}, week={self[1]}, weekday={self[2]})')
+
+
+_IsoCalendarDate = IsoCalendarDate
+del IsoCalendarDate
+_tzinfo_class = tzinfo
+
+class time:
+    """Time with time zone.
+
+    Constructors:
+
+    __new__()
+
+    Operators:
+
+    __repr__, __str__
+    __eq__, __le__, __lt__, __ge__, __gt__, __hash__
+
+    Methods:
+
+    strftime()
+    isoformat()
+    utcoffset()
+    tzname()
+    dst()
+
+    Properties (readonly):
+    hour, minute, second, microsecond, tzinfo, fold
+    """
+    __slots__ = '_hour', '_minute', '_second', '_microsecond', '_tzinfo', '_hashcode', '_fold'
+
+    def __new__(cls, hour=0, minute=0, second=0, microsecond=0, tzinfo=None, *, fold=0):
+        """Constructor.
+
+        Arguments:
+
+        hour, minute (required)
+        second, microsecond (default to zero)
+        tzinfo (default to None)
+        fold (keyword only, default to zero)
+        """
+        if (isinstance(hour, (bytes, str)) and len(hour) == 6 and
+            ord(hour[0:1])&0x7F < 24):
+            # Pickle support
+            if isinstance(hour, str):
+                try:
+                    hour = hour.encode('latin1')
+                except UnicodeEncodeError:
+                    # More informative error message.
+                    raise ValueError(
+                        "Failed to encode latin1 string when unpickling "
+                        "a time object. "
+                        "pickle.load(data, encoding='latin1') is assumed.")
+            self = object.__new__(cls)
+            self.__setstate(hour, minute or None)
+            self._hashcode = -1
+            return self
+        hour, minute, second, microsecond, fold = _check_time_fields(
+            hour, minute, second, microsecond, fold)
+        _check_tzinfo_arg(tzinfo)
+        self = object.__new__(cls)
+        self._hour = hour
+        self._minute = minute
+        self._second = second
+        self._microsecond = microsecond
+        self._tzinfo = tzinfo
+        self._hashcode = -1
+        self._fold = fold
+        return self
+
+    # Read-only field accessors
+    @property
+    def hour(self):
+        """hour (0-23)"""
+        return self._hour
+
+    @property
+    def minute(self):
+        """minute (0-59)"""
+        return self._minute
+
+    @property
+    def second(self):
+        """second (0-59)"""
+        return self._second
+
+    @property
+    def microsecond(self):
+        """microsecond (0-999999)"""
+        return self._microsecond
+
+    @property
+    def tzinfo(self):
+        """timezone info object"""
+        return self._tzinfo
+
+    @property
+    def fold(self):
+        return self._fold
+
+    # Standard conversions, __hash__ (and helpers)
+
+    # Comparisons of time objects with other.
+
+    def __eq__(self, other):
+        if isinstance(other, time):
+            return self._cmp(other, allow_mixed=True) == 0
+        else:
+            return NotImplemented
+
+    def __le__(self, other):
+        if isinstance(other, time):
+            return self._cmp(other) <= 0
+        else:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if isinstance(other, time):
+            return self._cmp(other) < 0
+        else:
+            return NotImplemented
+
+    def __ge__(self, other):
+        if isinstance(other, time):
+            return self._cmp(other) >= 0
+        else:
+            return NotImplemented
+
+    def __gt__(self, other):
+        if isinstance(other, time):
+            return self._cmp(other) > 0
+        else:
+            return NotImplemented
+
+    def _cmp(self, other, allow_mixed=False):
+        assert isinstance(other, time)
+        mytz = self._tzinfo
+        ottz = other._tzinfo
+        myoff = otoff = None
+
+        if mytz is ottz:
+            base_compare = True
+        else:
+            myoff = self.utcoffset()
+            otoff = other.utcoffset()
+            base_compare = myoff == otoff
+
+        if base_compare:
+            return _cmp((self._hour, self._minute, self._second,
+                         self._microsecond),
+                        (other._hour, other._minute, other._second,
+                         other._microsecond))
+        if myoff is None or otoff is None:
+            if allow_mixed:
+                return 2 # arbitrary non-zero value
+            else:
+                raise TypeError("cannot compare naive and aware times")
+        myhhmm = self._hour * 60 + self._minute - myoff//timedelta(minutes=1)
+        othhmm = other._hour * 60 + other._minute - otoff//timedelta(minutes=1)
+        return _cmp((myhhmm, self._second, self._microsecond),
+                    (othhmm, other._second, other._microsecond))
+
+    def __hash__(self):
+        """Hash."""
+        if self._hashcode == -1:
+            if self.fold:
+                t = self.replace(fold=0)
+            else:
+                t = self
+            tzoff = t.utcoffset()
+            if not tzoff:  # zero or None
+                self._hashcode = hash(t._getstate()[0])
+            else:
+                h, m = divmod(timedelta(hours=self.hour, minutes=self.minute) - tzoff,
+                              timedelta(hours=1))
+                assert not m % timedelta(minutes=1), "whole minute"
+                m //= timedelta(minutes=1)
+                if 0 <= h < 24:
+                    self._hashcode = hash(time(h, m, self.second, self.microsecond))
+                else:
+                    self._hashcode = hash((h, m, self.second, self.microsecond))
+        return self._hashcode
+
+    # Conversion to string
+
+    def _tzstr(self):
+        """Return formatted timezone offset (+xx:xx) or an empty string."""
+        off = self.utcoffset()
+        return _format_offset(off)
+
+    def __repr__(self):
+        """Convert to formal string, for repr()."""
+        if self._microsecond != 0:
+            s = ", %d, %d" % (self._second, self._microsecond)
+        elif self._second != 0:
+            s = ", %d" % self._second
+        else:
+            s = ""
+        s= "%s.%s(%d, %d%s)" % (_get_class_module(self),
+                                self.__class__.__qualname__,
+                                self._hour, self._minute, s)
+        if self._tzinfo is not None:
+            assert s[-1:] == ")"
+            s = s[:-1] + ", tzinfo=%r" % self._tzinfo + ")"
+        if self._fold:
+            assert s[-1:] == ")"
+            s = s[:-1] + ", fold=1)"
+        return s
+
+    def isoformat(self, timespec='auto'):
+        """Return the time formatted according to ISO.
+
+        The full format is 'HH:MM:SS.mmmmmm+zz:zz'. By default, the fractional
+        part is omitted if self.microsecond == 0.
+
+        The optional argument timespec specifies the number of additional
+        terms of the time to include. Valid options are 'auto', 'hours',
+        'minutes', 'seconds', 'milliseconds' and 'microseconds'.
+        """
+        s = _format_time(self._hour, self._minute, self._second,
+                          self._microsecond, timespec)
+        tz = self._tzstr()
+        if tz:
+            s += tz
+        return s
+
+    __str__ = isoformat
+
+    @classmethod
+    def fromisoformat(cls, time_string):
+        """Construct a time from a string in one of the ISO 8601 formats."""
+        if not isinstance(time_string, str):
+            raise TypeError('fromisoformat: argument must be str')
+
+        # The spec actually requires that time-only ISO 8601 strings start with
+        # T, but the extended format allows this to be omitted as long as there
+        # is no ambiguity with date strings.
+        time_string = time_string.removeprefix('T')
+
+        try:
+            return cls(*_parse_isoformat_time(time_string))
+        except Exception:
+            raise ValueError(f'Invalid isoformat string: {time_string!r}')
+
+    def strftime(self, format):
+        """Format using strftime().  The date part of the timestamp passed
+        to underlying strftime should not be used.
+        """
+        # The year must be >= 1000 else Python's strftime implementation
+        # can raise a bogus exception.
+        timetuple = (1900, 1, 1,
+                     self._hour, self._minute, self._second,
+                     0, 1, -1)
+        return _wrap_strftime(self, format, timetuple)
+
+    def __format__(self, fmt):
+        if not isinstance(fmt, str):
+            raise TypeError("must be str, not %s" % type(fmt).__name__)
+        if len(fmt) != 0:
+            return self.strftime(fmt)
+        return str(self)
+
+    # Timezone functions
+
+    def utcoffset(self):
+        """Return the timezone offset as timedelta, positive east of UTC
+         (negative west of UTC)."""
+        if self._tzinfo is None:
+            return None
+        offset = self._tzinfo.utcoffset(None)
+        _check_utc_offset("utcoffset", offset)
+        return offset
+
+    def tzname(self):
+        """Return the timezone name.
+
+        Note that the name is 100% informational -- there's no requirement that
+        it mean anything in particular. For example, "GMT", "UTC", "-500",
+        "-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.
+        """
+        if self._tzinfo is None:
+            return None
+        name = self._tzinfo.tzname(None)
+        _check_tzname(name)
+        return name
+
+    def dst(self):
+        """Return 0 if DST is not in effect, or the DST offset (as timedelta
+        positive eastward) if DST is in effect.
+
+        This is purely informational; the DST offset has already been added to
+        the UTC offset returned by utcoffset() if applicable, so there's no
+        need to consult dst() unless you're interested in displaying the DST
+        info.
+        """
+        if self._tzinfo is None:
+            return None
+        offset = self._tzinfo.dst(None)
+        _check_utc_offset("dst", offset)
+        return offset
+
+    def replace(self, hour=None, minute=None, second=None, microsecond=None,
+                tzinfo=True, *, fold=None):
+        """Return a new time with new values for the specified fields."""
+        if hour is None:
+            hour = self.hour
+        if minute is None:
+            minute = self.minute
+        if second is None:
+            second = self.second
+        if microsecond is None:
+            microsecond = self.microsecond
+        if tzinfo is True:
+            tzinfo = self.tzinfo
+        if fold is None:
+            fold = self._fold
+        return type(self)(hour, minute, second, microsecond, tzinfo, fold=fold)
+
+    # Pickle support.
+
+    def _getstate(self, protocol=3):
+        us2, us3 = divmod(self._microsecond, 256)
+        us1, us2 = divmod(us2, 256)
+        h = self._hour
+        if self._fold and protocol > 3:
+            h += 128
+        basestate = bytes([h, self._minute, self._second,
+                           us1, us2, us3])
+        if self._tzinfo is None:
+            return (basestate,)
+        else:
+            return (basestate, self._tzinfo)
+
+    def __setstate(self, string, tzinfo):
+        if tzinfo is not None and not isinstance(tzinfo, _tzinfo_class):
+            raise TypeError("bad tzinfo state arg")
+        h, self._minute, self._second, us1, us2, us3 = string
+        if h > 127:
+            self._fold = 1
+            self._hour = h - 128
+        else:
+            self._fold = 0
+            self._hour = h
+        self._microsecond = (((us1 << 8) | us2) << 8) | us3
+        self._tzinfo = tzinfo
+
+    def __reduce_ex__(self, protocol):
+        return (self.__class__, self._getstate(protocol))
+
+    def __reduce__(self):
+        return self.__reduce_ex__(2)
+
+_time_class = time  # so functions w/ args named "time" can get at the class
+
+time.min = time(0, 0, 0)
+time.max = time(23, 59, 59, 999999)
+time.resolution = timedelta(microseconds=1)
+
+
+class datetime(date):
+    """datetime(year, month, day[, hour[, minute[, second[, microsecond[,tzinfo]]]]])
+
+    The year, month and day arguments are required. tzinfo may be None, or an
+    instance of a tzinfo subclass. The remaining arguments may be ints.
+    """
+    __slots__ = date.__slots__ + time.__slots__
+
+    def __new__(cls, year, month=None, day=None, hour=0, minute=0, second=0,
+                microsecond=0, tzinfo=None, *, fold=0):
+        if (isinstance(year, (bytes, str)) and len(year) == 10 and
+            1 <= ord(year[2:3])&0x7F <= 12):
+            # Pickle support
+            if isinstance(year, str):
+                try:
+                    year = bytes(year, 'latin1')
+                except UnicodeEncodeError:
+                    # More informative error message.
+                    raise ValueError(
+                        "Failed to encode latin1 string when unpickling "
+                        "a datetime object. "
+                        "pickle.load(data, encoding='latin1') is assumed.")
+            self = object.__new__(cls)
+            self.__setstate(year, month)
+            self._hashcode = -1
+            return self
+        year, month, day = _check_date_fields(year, month, day)
+        hour, minute, second, microsecond, fold = _check_time_fields(
+            hour, minute, second, microsecond, fold)
+        _check_tzinfo_arg(tzinfo)
+        self = object.__new__(cls)
+        self._year = year
+        self._month = month
+        self._day = day
+        self._hour = hour
+        self._minute = minute
+        self._second = second
+        self._microsecond = microsecond
+        self._tzinfo = tzinfo
+        self._hashcode = -1
+        self._fold = fold
+        return self
+
+    # Read-only field accessors
+    @property
+    def hour(self):
+        """hour (0-23)"""
+        return self._hour
+
+    @property
+    def minute(self):
+        """minute (0-59)"""
+        return self._minute
+
+    @property
+    def second(self):
+        """second (0-59)"""
+        return self._second
+
+    @property
+    def microsecond(self):
+        """microsecond (0-999999)"""
+        return self._microsecond
+
+    @property
+    def tzinfo(self):
+        """timezone info object"""
+        return self._tzinfo
+
+    @property
+    def fold(self):
+        return self._fold
+
+    @classmethod
+    def _fromtimestamp(cls, t, utc, tz):
+        """Construct a datetime from a POSIX timestamp (like time.time()).
+
+        A timezone info object may be passed in as well.
+        """
+        frac, t = _math.modf(t)
+        us = round(frac * 1e6)
+        if us >= 1000000:
+            t += 1
+            us -= 1000000
+        elif us < 0:
+            t -= 1
+            us += 1000000
+
+        converter = _time.gmtime if utc else _time.localtime
+        y, m, d, hh, mm, ss, weekday, jday, dst = converter(t)
+        ss = min(ss, 59)    # clamp out leap seconds if the platform has them
+        result = cls(y, m, d, hh, mm, ss, us, tz)
+        if tz is None and not utc:
+            # As of version 2015f max fold in IANA database is
+            # 23 hours at 1969-09-30 13:00:00 in Kwajalein.
+            # Let's probe 24 hours in the past to detect a transition:
+            max_fold_seconds = 24 * 3600
+
+            # On Windows localtime_s throws an OSError for negative values,
+            # thus we can't perform fold detection for values of time less
+            # than the max time fold. See comments in _datetimemodule's
+            # version of this method for more details.
+            if t < max_fold_seconds and sys.platform.startswith("win"):
+                return result
+
+            y, m, d, hh, mm, ss = converter(t - max_fold_seconds)[:6]
+            probe1 = cls(y, m, d, hh, mm, ss, us, tz)
+            trans = result - probe1 - timedelta(0, max_fold_seconds)
+            if trans.days < 0:
+                y, m, d, hh, mm, ss = converter(t + trans // timedelta(0, 1))[:6]
+                probe2 = cls(y, m, d, hh, mm, ss, us, tz)
+                if probe2 == result:
+                    result._fold = 1
+        elif tz is not None:
+            result = tz.fromutc(result)
+        return result
+
+    @classmethod
+    def fromtimestamp(cls, timestamp, tz=None):
+        """Construct a datetime from a POSIX timestamp (like time.time()).
+
+        A timezone info object may be passed in as well.
+        """
+        _check_tzinfo_arg(tz)
+
+        return cls._fromtimestamp(timestamp, tz is not None, tz)
+
+    @classmethod
+    def utcfromtimestamp(cls, t):
+        """Construct a naive UTC datetime from a POSIX timestamp."""
+        import warnings
+        warnings.warn("datetime.datetime.utcfromtimestamp() is deprecated and scheduled "
+                      "for removal in a future version. Use timezone-aware "
+                      "objects to represent datetimes in UTC: "
+                      "datetime.datetime.fromtimestamp(t, datetime.UTC).",
+                      DeprecationWarning,
+                      stacklevel=2)
+        return cls._fromtimestamp(t, True, None)
+
+    @classmethod
+    def now(cls, tz=None):
+        "Construct a datetime from time.time() and optional time zone info."
+        t = _time.time()
+        return cls.fromtimestamp(t, tz)
+
+    @classmethod
+    def utcnow(cls):
+        "Construct a UTC datetime from time.time()."
+        import warnings
+        warnings.warn("datetime.datetime.utcnow() is deprecated and scheduled for "
+                      "removal in a future version. Use timezone-aware "
+                      "objects to represent datetimes in UTC: "
+                      "datetime.datetime.now(datetime.UTC).",
+                      DeprecationWarning,
+                      stacklevel=2)
+        t = _time.time()
+        return cls._fromtimestamp(t, True, None)
+
+    @classmethod
+    def combine(cls, date, time, tzinfo=True):
+        "Construct a datetime from a given date and a given time."
+        if not isinstance(date, _date_class):
+            raise TypeError("date argument must be a date instance")
+        if not isinstance(time, _time_class):
+            raise TypeError("time argument must be a time instance")
+        if tzinfo is True:
+            tzinfo = time.tzinfo
+        return cls(date.year, date.month, date.day,
+                   time.hour, time.minute, time.second, time.microsecond,
+                   tzinfo, fold=time.fold)
+
+    @classmethod
+    def fromisoformat(cls, date_string):
+        """Construct a datetime from a string in one of the ISO 8601 formats."""
+        if not isinstance(date_string, str):
+            raise TypeError('fromisoformat: argument must be str')
+
+        if len(date_string) < 7:
+            raise ValueError(f'Invalid isoformat string: {date_string!r}')
+
+        # Split this at the separator
+        try:
+            separator_location = _find_isoformat_datetime_separator(date_string)
+            dstr = date_string[0:separator_location]
+            tstr = date_string[(separator_location+1):]
+
+            date_components = _parse_isoformat_date(dstr)
+        except ValueError:
+            raise ValueError(
+                f'Invalid isoformat string: {date_string!r}') from None
+
+        if tstr:
+            try:
+                time_components = _parse_isoformat_time(tstr)
+            except ValueError:
+                raise ValueError(
+                    f'Invalid isoformat string: {date_string!r}') from None
+        else:
+            time_components = [0, 0, 0, 0, None]
+
+        return cls(*(date_components + time_components))
+
+    def timetuple(self):
+        "Return local time tuple compatible with time.localtime()."
+        dst = self.dst()
+        if dst is None:
+            dst = -1
+        elif dst:
+            dst = 1
+        else:
+            dst = 0
+        return _build_struct_time(self.year, self.month, self.day,
+                                  self.hour, self.minute, self.second,
+                                  dst)
+
+    def _mktime(self):
+        """Return integer POSIX timestamp."""
+        epoch = datetime(1970, 1, 1)
+        max_fold_seconds = 24 * 3600
+        t = (self - epoch) // timedelta(0, 1)
+        def local(u):
+            y, m, d, hh, mm, ss = _time.localtime(u)[:6]
+            return (datetime(y, m, d, hh, mm, ss) - epoch) // timedelta(0, 1)
+
+        # Our goal is to solve t = local(u) for u.
+        a = local(t) - t
+        u1 = t - a
+        t1 = local(u1)
+        if t1 == t:
+            # We found one solution, but it may not be the one we need.
+            # Look for an earlier solution (if `fold` is 0), or a
+            # later one (if `fold` is 1).
+            u2 = u1 + (-max_fold_seconds, max_fold_seconds)[self.fold]
+            b = local(u2) - u2
+            if a == b:
+                return u1
+        else:
+            b = t1 - u1
+            assert a != b
+        u2 = t - b
+        t2 = local(u2)
+        if t2 == t:
+            return u2
+        if t1 == t:
+            return u1
+        # We have found both offsets a and b, but neither t - a nor t - b is
+        # a solution.  This means t is in the gap.
+        return (max, min)[self.fold](u1, u2)
+
+
+    def timestamp(self):
+        "Return POSIX timestamp as float"
+        if self._tzinfo is None:
+            s = self._mktime()
+            return s + self.microsecond / 1e6
+        else:
+            return (self - _EPOCH).total_seconds()
+
+    def utctimetuple(self):
+        "Return UTC time tuple compatible with time.gmtime()."
+        offset = self.utcoffset()
+        if offset:
+            self -= offset
+        y, m, d = self.year, self.month, self.day
+        hh, mm, ss = self.hour, self.minute, self.second
+        return _build_struct_time(y, m, d, hh, mm, ss, 0)
+
+    def date(self):
+        "Return the date part."
+        return date(self._year, self._month, self._day)
+
+    def time(self):
+        "Return the time part, with tzinfo None."
+        return time(self.hour, self.minute, self.second, self.microsecond, fold=self.fold)
+
+    def timetz(self):
+        "Return the time part, with same tzinfo."
+        return time(self.hour, self.minute, self.second, self.microsecond,
+                    self._tzinfo, fold=self.fold)
+
+    def replace(self, year=None, month=None, day=None, hour=None,
+                minute=None, second=None, microsecond=None, tzinfo=True,
+                *, fold=None):
+        """Return a new datetime with new values for the specified fields."""
+        if year is None:
+            year = self.year
+        if month is None:
+            month = self.month
+        if day is None:
+            day = self.day
+        if hour is None:
+            hour = self.hour
+        if minute is None:
+            minute = self.minute
+        if second is None:
+            second = self.second
+        if microsecond is None:
+            microsecond = self.microsecond
+        if tzinfo is True:
+            tzinfo = self.tzinfo
+        if fold is None:
+            fold = self.fold
+        return type(self)(year, month, day, hour, minute, second,
+                          microsecond, tzinfo, fold=fold)
+
+    def _local_timezone(self):
+        if self.tzinfo is None:
+            ts = self._mktime()
+            # Detect gap
+            ts2 = self.replace(fold=1-self.fold)._mktime()
+            if ts2 != ts: # This happens in a gap or a fold
+                if (ts2 > ts) == self.fold:
+                    ts = ts2
+        else:
+            ts = (self - _EPOCH) // timedelta(seconds=1)
+        localtm = _time.localtime(ts)
+        local = datetime(*localtm[:6])
+        # Extract TZ data
+        gmtoff = localtm.tm_gmtoff
+        zone = localtm.tm_zone
+        return timezone(timedelta(seconds=gmtoff), zone)
+
+    def astimezone(self, tz=None):
+        if tz is None:
+            tz = self._local_timezone()
+        elif not isinstance(tz, tzinfo):
+            raise TypeError("tz argument must be an instance of tzinfo")
+
+        mytz = self.tzinfo
+        if mytz is None:
+            mytz = self._local_timezone()
+            myoffset = mytz.utcoffset(self)
+        else:
+            myoffset = mytz.utcoffset(self)
+            if myoffset is None:
+                mytz = self.replace(tzinfo=None)._local_timezone()
+                myoffset = mytz.utcoffset(self)
+
+        if tz is mytz:
+            return self
+
+        # Convert self to UTC, and attach the new time zone object.
+        utc = (self - myoffset).replace(tzinfo=tz)
+
+        # Convert from UTC to tz's local time.
+        return tz.fromutc(utc)
+
+    # Ways to produce a string.
+
+    def ctime(self):
+        "Return ctime() style string."
+        weekday = self.toordinal() % 7 or 7
+        return "%s %s %2d %02d:%02d:%02d %04d" % (
+            _DAYNAMES[weekday],
+            _MONTHNAMES[self._month],
+            self._day,
+            self._hour, self._minute, self._second,
+            self._year)
+
+    def isoformat(self, sep='T', timespec='auto'):
+        """Return the time formatted according to ISO.
+
+        The full format looks like 'YYYY-MM-DD HH:MM:SS.mmmmmm'.
+        By default, the fractional part is omitted if self.microsecond == 0.
+
+        If self.tzinfo is not None, the UTC offset is also attached, giving
+        giving a full format of 'YYYY-MM-DD HH:MM:SS.mmmmmm+HH:MM'.
+
+        Optional argument sep specifies the separator between date and
+        time, default 'T'.
+
+        The optional argument timespec specifies the number of additional
+        terms of the time to include. Valid options are 'auto', 'hours',
+        'minutes', 'seconds', 'milliseconds' and 'microseconds'.
+        """
+        s = ("%04d-%02d-%02d%c" % (self._year, self._month, self._day, sep) +
+             _format_time(self._hour, self._minute, self._second,
+                          self._microsecond, timespec))
+
+        off = self.utcoffset()
+        tz = _format_offset(off)
+        if tz:
+            s += tz
+
+        return s
+
+    def __repr__(self):
+        """Convert to formal string, for repr()."""
+        L = [self._year, self._month, self._day,  # These are never zero
+             self._hour, self._minute, self._second, self._microsecond]
+        if L[-1] == 0:
+            del L[-1]
+        if L[-1] == 0:
+            del L[-1]
+        s = "%s.%s(%s)" % (_get_class_module(self),
+                           self.__class__.__qualname__,
+                           ", ".join(map(str, L)))
+        if self._tzinfo is not None:
+            assert s[-1:] == ")"
+            s = s[:-1] + ", tzinfo=%r" % self._tzinfo + ")"
+        if self._fold:
+            assert s[-1:] == ")"
+            s = s[:-1] + ", fold=1)"
+        return s
+
+    def __str__(self):
+        "Convert to string, for str()."
+        return self.isoformat(sep=' ')
+
+    @classmethod
+    def strptime(cls, date_string, format):
+        'string, format -> new datetime parsed from a string (like time.strptime()).'
+        import _strptime
+        return _strptime._strptime_datetime(cls, date_string, format)
+
+    def utcoffset(self):
+        """Return the timezone offset as timedelta positive east of UTC (negative west of
+        UTC)."""
+        if self._tzinfo is None:
+            return None
+        offset = self._tzinfo.utcoffset(self)
+        _check_utc_offset("utcoffset", offset)
+        return offset
+
+    def tzname(self):
+        """Return the timezone name.
+
+        Note that the name is 100% informational -- there's no requirement that
+        it mean anything in particular. For example, "GMT", "UTC", "-500",
+        "-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.
+        """
+        if self._tzinfo is None:
+            return None
+        name = self._tzinfo.tzname(self)
+        _check_tzname(name)
+        return name
+
+    def dst(self):
+        """Return 0 if DST is not in effect, or the DST offset (as timedelta
+        positive eastward) if DST is in effect.
+
+        This is purely informational; the DST offset has already been added to
+        the UTC offset returned by utcoffset() if applicable, so there's no
+        need to consult dst() unless you're interested in displaying the DST
+        info.
+        """
+        if self._tzinfo is None:
+            return None
+        offset = self._tzinfo.dst(self)
+        _check_utc_offset("dst", offset)
+        return offset
+
+    # Comparisons of datetime objects with other.
+
+    def __eq__(self, other):
+        if isinstance(other, datetime):
+            return self._cmp(other, allow_mixed=True) == 0
+        elif not isinstance(other, date):
+            return NotImplemented
+        else:
+            return False
+
+    def __le__(self, other):
+        if isinstance(other, datetime):
+            return self._cmp(other) <= 0
+        elif not isinstance(other, date):
+            return NotImplemented
+        else:
+            _cmperror(self, other)
+
+    def __lt__(self, other):
+        if isinstance(other, datetime):
+            return self._cmp(other) < 0
+        elif not isinstance(other, date):
+            return NotImplemented
+        else:
+            _cmperror(self, other)
+
+    def __ge__(self, other):
+        if isinstance(other, datetime):
+            return self._cmp(other) >= 0
+        elif not isinstance(other, date):
+            return NotImplemented
+        else:
+            _cmperror(self, other)
+
+    def __gt__(self, other):
+        if isinstance(other, datetime):
+            return self._cmp(other) > 0
+        elif not isinstance(other, date):
+            return NotImplemented
+        else:
+            _cmperror(self, other)
+
+    def _cmp(self, other, allow_mixed=False):
+        assert isinstance(other, datetime)
+        mytz = self._tzinfo
+        ottz = other._tzinfo
+        myoff = otoff = None
+
+        if mytz is ottz:
+            base_compare = True
+        else:
+            myoff = self.utcoffset()
+            otoff = other.utcoffset()
+            # Assume that allow_mixed means that we are called from __eq__
+            if allow_mixed:
+                if myoff != self.replace(fold=not self.fold).utcoffset():
+                    return 2
+                if otoff != other.replace(fold=not other.fold).utcoffset():
+                    return 2
+            base_compare = myoff == otoff
+
+        if base_compare:
+            return _cmp((self._year, self._month, self._day,
+                         self._hour, self._minute, self._second,
+                         self._microsecond),
+                        (other._year, other._month, other._day,
+                         other._hour, other._minute, other._second,
+                         other._microsecond))
+        if myoff is None or otoff is None:
+            if allow_mixed:
+                return 2 # arbitrary non-zero value
+            else:
+                raise TypeError("cannot compare naive and aware datetimes")
+        # XXX What follows could be done more efficiently...
+        diff = self - other     # this will take offsets into account
+        if diff.days < 0:
+            return -1
+        return diff and 1 or 0
+
+    def __add__(self, other):
+        "Add a datetime and a timedelta."
+        if not isinstance(other, timedelta):
+            return NotImplemented
+        delta = timedelta(self.toordinal(),
+                          hours=self._hour,
+                          minutes=self._minute,
+                          seconds=self._second,
+                          microseconds=self._microsecond)
+        delta += other
+        hour, rem = divmod(delta.seconds, 3600)
+        minute, second = divmod(rem, 60)
+        if 0 < delta.days <= _MAXORDINAL:
+            return type(self).combine(date.fromordinal(delta.days),
+                                      time(hour, minute, second,
+                                           delta.microseconds,
+                                           tzinfo=self._tzinfo))
+        raise OverflowError("result out of range")
+
+    __radd__ = __add__
+
+    def __sub__(self, other):
+        "Subtract two datetimes, or a datetime and a timedelta."
+        if not isinstance(other, datetime):
+            if isinstance(other, timedelta):
+                return self + -other
+            return NotImplemented
+
+        days1 = self.toordinal()
+        days2 = other.toordinal()
+        secs1 = self._second + self._minute * 60 + self._hour * 3600
+        secs2 = other._second + other._minute * 60 + other._hour * 3600
+        base = timedelta(days1 - days2,
+                         secs1 - secs2,
+                         self._microsecond - other._microsecond)
+        if self._tzinfo is other._tzinfo:
+            return base
+        myoff = self.utcoffset()
+        otoff = other.utcoffset()
+        if myoff == otoff:
+            return base
+        if myoff is None or otoff is None:
+            raise TypeError("cannot mix naive and timezone-aware time")
+        return base + otoff - myoff
+
+    def __hash__(self):
+        if self._hashcode == -1:
+            if self.fold:
+                t = self.replace(fold=0)
+            else:
+                t = self
+            tzoff = t.utcoffset()
+            if tzoff is None:
+                self._hashcode = hash(t._getstate()[0])
+            else:
+                days = _ymd2ord(self.year, self.month, self.day)
+                seconds = self.hour * 3600 + self.minute * 60 + self.second
+                self._hashcode = hash(timedelta(days, seconds, self.microsecond) - tzoff)
+        return self._hashcode
+
+    # Pickle support.
+
+    def _getstate(self, protocol=3):
+        yhi, ylo = divmod(self._year, 256)
+        us2, us3 = divmod(self._microsecond, 256)
+        us1, us2 = divmod(us2, 256)
+        m = self._month
+        if self._fold and protocol > 3:
+            m += 128
+        basestate = bytes([yhi, ylo, m, self._day,
+                           self._hour, self._minute, self._second,
+                           us1, us2, us3])
+        if self._tzinfo is None:
+            return (basestate,)
+        else:
+            return (basestate, self._tzinfo)
+
+    def __setstate(self, string, tzinfo):
+        if tzinfo is not None and not isinstance(tzinfo, _tzinfo_class):
+            raise TypeError("bad tzinfo state arg")
+        (yhi, ylo, m, self._day, self._hour,
+         self._minute, self._second, us1, us2, us3) = string
+        if m > 127:
+            self._fold = 1
+            self._month = m - 128
+        else:
+            self._fold = 0
+            self._month = m
+        self._year = yhi * 256 + ylo
+        self._microsecond = (((us1 << 8) | us2) << 8) | us3
+        self._tzinfo = tzinfo
+
+    def __reduce_ex__(self, protocol):
+        return (self.__class__, self._getstate(protocol))
+
+    def __reduce__(self):
+        return self.__reduce_ex__(2)
+
+
+datetime.min = datetime(1, 1, 1)
+datetime.max = datetime(9999, 12, 31, 23, 59, 59, 999999)
+datetime.resolution = timedelta(microseconds=1)
+
+
+def _isoweek1monday(year):
+    # Helper to calculate the day number of the Monday starting week 1
+    # XXX This could be done more efficiently
+    THURSDAY = 3
+    firstday = _ymd2ord(year, 1, 1)
+    firstweekday = (firstday + 6) % 7  # See weekday() above
+    week1monday = firstday - firstweekday
+    if firstweekday > THURSDAY:
+        week1monday += 7
+    return week1monday
+
+
+class timezone(tzinfo):
+    __slots__ = '_offset', '_name'
+
+    # Sentinel value to disallow None
+    _Omitted = object()
+    def __new__(cls, offset, name=_Omitted):
+        if not isinstance(offset, timedelta):
+            raise TypeError("offset must be a timedelta")
+        if name is cls._Omitted:
+            if not offset:
+                return cls.utc
+            name = None
+        elif not isinstance(name, str):
+            raise TypeError("name must be a string")
+        if not cls._minoffset <= offset <= cls._maxoffset:
+            raise ValueError("offset must be a timedelta "
+                             "strictly between -timedelta(hours=24) and "
+                             "timedelta(hours=24).")
+        return cls._create(offset, name)
+
+    @classmethod
+    def _create(cls, offset, name=None):
+        self = tzinfo.__new__(cls)
+        self._offset = offset
+        self._name = name
+        return self
+
+    def __getinitargs__(self):
+        """pickle support"""
+        if self._name is None:
+            return (self._offset,)
+        return (self._offset, self._name)
+
+    def __eq__(self, other):
+        if isinstance(other, timezone):
+            return self._offset == other._offset
+        return NotImplemented
+
+    def __hash__(self):
+        return hash(self._offset)
+
+    def __repr__(self):
+        """Convert to formal string, for repr().
+
+        >>> tz = timezone.utc
+        >>> repr(tz)
+        'datetime.timezone.utc'
+        >>> tz = timezone(timedelta(hours=-5), 'EST')
+        >>> repr(tz)
+        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
+        """
+        if self is self.utc:
+            return 'datetime.timezone.utc'
+        if self._name is None:
+            return "%s.%s(%r)" % (_get_class_module(self),
+                                  self.__class__.__qualname__,
+                                  self._offset)
+        return "%s.%s(%r, %r)" % (_get_class_module(self),
+                                  self.__class__.__qualname__,
+                                  self._offset, self._name)
+
+    def __str__(self):
+        return self.tzname(None)
+
+    def utcoffset(self, dt):
+        if isinstance(dt, datetime) or dt is None:
+            return self._offset
+        raise TypeError("utcoffset() argument must be a datetime instance"
+                        " or None")
+
+    def tzname(self, dt):
+        if isinstance(dt, datetime) or dt is None:
+            if self._name is None:
+                return self._name_from_offset(self._offset)
+            return self._name
+        raise TypeError("tzname() argument must be a datetime instance"
+                        " or None")
+
+    def dst(self, dt):
+        if isinstance(dt, datetime) or dt is None:
+            return None
+        raise TypeError("dst() argument must be a datetime instance"
+                        " or None")
+
+    def fromutc(self, dt):
+        if isinstance(dt, datetime):
+            if dt.tzinfo is not self:
+                raise ValueError("fromutc: dt.tzinfo "
+                                 "is not self")
+            return dt + self._offset
+        raise TypeError("fromutc() argument must be a datetime instance"
+                        " or None")
+
+    _maxoffset = timedelta(hours=24, microseconds=-1)
+    _minoffset = -_maxoffset
+
+    @staticmethod
+    def _name_from_offset(delta):
+        if not delta:
+            return 'UTC'
+        if delta < timedelta(0):
+            sign = '-'
+            delta = -delta
+        else:
+            sign = '+'
+        hours, rest = divmod(delta, timedelta(hours=1))
+        minutes, rest = divmod(rest, timedelta(minutes=1))
+        seconds = rest.seconds
+        microseconds = rest.microseconds
+        if microseconds:
+            return (f'UTC{sign}{hours:02d}:{minutes:02d}:{seconds:02d}'
+                    f'.{microseconds:06d}')
+        if seconds:
+            return f'UTC{sign}{hours:02d}:{minutes:02d}:{seconds:02d}'
+        return f'UTC{sign}{hours:02d}:{minutes:02d}'
+
+UTC = timezone.utc = timezone._create(timedelta(0))
+
+# bpo-37642: These attributes are rounded to the nearest minute for backwards
+# compatibility, even though the constructor will accept a wider range of
+# values. This may change in the future.
+timezone.min = timezone._create(-timedelta(hours=23, minutes=59))
+timezone.max = timezone._create(timedelta(hours=23, minutes=59))
+_EPOCH = datetime(1970, 1, 1, tzinfo=timezone.utc)
+
+# Some time zone algebra.  For a datetime x, let
+#     x.n = x stripped of its timezone -- its naive time.
+#     x.o = x.utcoffset(), and assuming that doesn't raise an exception or
+#           return None
+#     x.d = x.dst(), and assuming that doesn't raise an exception or
+#           return None
+#     x.s = x's standard offset, x.o - x.d
+#
+# Now some derived rules, where k is a duration (timedelta).
+#
+# 1. x.o = x.s + x.d
+#    This follows from the definition of x.s.
+#
+# 2. If x and y have the same tzinfo member, x.s = y.s.
+#    This is actually a requirement, an assumption we need to make about
+#    sane tzinfo classes.
+#
+# 3. The naive UTC time corresponding to x is x.n - x.o.
+#    This is again a requirement for a sane tzinfo class.
+#
+# 4. (x+k).s = x.s
+#    This follows from #2, and that datetime.timetz+timedelta preserves tzinfo.
+#
+# 5. (x+k).n = x.n + k
+#    Again follows from how arithmetic is defined.
+#
+# Now we can explain tz.fromutc(x).  Let's assume it's an interesting case
+# (meaning that the various tzinfo methods exist, and don't blow up or return
+# None when called).
+#
+# The function wants to return a datetime y with timezone tz, equivalent to x.
+# x is already in UTC.
+#
+# By #3, we want
+#
+#     y.n - y.o = x.n                             [1]
+#
+# The algorithm starts by attaching tz to x.n, and calling that y.  So
+# x.n = y.n at the start.  Then it wants to add a duration k to y, so that [1]
+# becomes true; in effect, we want to solve [2] for k:
+#
+#    (y+k).n - (y+k).o = x.n                      [2]
+#
+# By #1, this is the same as
+#
+#    (y+k).n - ((y+k).s + (y+k).d) = x.n          [3]
+#
+# By #5, (y+k).n = y.n + k, which equals x.n + k because x.n=y.n at the start.
+# Substituting that into [3],
+#
+#    x.n + k - (y+k).s - (y+k).d = x.n; the x.n terms cancel, leaving
+#    k - (y+k).s - (y+k).d = 0; rearranging,
+#    k = (y+k).s - (y+k).d; by #4, (y+k).s == y.s, so
+#    k = y.s - (y+k).d
+#
+# On the RHS, (y+k).d can't be computed directly, but y.s can be, and we
+# approximate k by ignoring the (y+k).d term at first.  Note that k can't be
+# very large, since all offset-returning methods return a duration of magnitude
+# less than 24 hours.  For that reason, if y is firmly in std time, (y+k).d must
+# be 0, so ignoring it has no consequence then.
+#
+# In any case, the new value is
+#
+#     z = y + y.s                                 [4]
+#
+# It's helpful to step back at look at [4] from a higher level:  it's simply
+# mapping from UTC to tz's standard time.
+#
+# At this point, if
+#
+#     z.n - z.o = x.n                             [5]
+#
+# we have an equivalent time, and are almost done.  The insecurity here is
+# at the start of daylight time.  Picture US Eastern for concreteness.  The wall
+# time jumps from 1:59 to 3:00, and wall hours of the form 2:MM don't make good
+# sense then.  The docs ask that an Eastern tzinfo class consider such a time to
+# be EDT (because it's "after 2"), which is a redundant spelling of 1:MM EST
+# on the day DST starts.  We want to return the 1:MM EST spelling because that's
+# the only spelling that makes sense on the local wall clock.
+#
+# In fact, if [5] holds at this point, we do have the standard-time spelling,
+# but that takes a bit of proof.  We first prove a stronger result.  What's the
+# difference between the LHS and RHS of [5]?  Let
+#
+#     diff = x.n - (z.n - z.o)                    [6]
+#
+# Now
+#     z.n =                       by [4]
+#     (y + y.s).n =               by #5
+#     y.n + y.s =                 since y.n = x.n
+#     x.n + y.s =                 since z and y are have the same tzinfo member,
+#                                     y.s = z.s by #2
+#     x.n + z.s
+#
+# Plugging that back into [6] gives
+#
+#     diff =
+#     x.n - ((x.n + z.s) - z.o) =     expanding
+#     x.n - x.n - z.s + z.o =         cancelling
+#     - z.s + z.o =                   by #2
+#     z.d
+#
+# So diff = z.d.
+#
+# If [5] is true now, diff = 0, so z.d = 0 too, and we have the standard-time
+# spelling we wanted in the endcase described above.  We're done.  Contrarily,
+# if z.d = 0, then we have a UTC equivalent, and are also done.
+#
+# If [5] is not true now, diff = z.d != 0, and z.d is the offset we need to
+# add to z (in effect, z is in tz's standard time, and we need to shift the
+# local clock into tz's daylight time).
+#
+# Let
+#
+#     z' = z + z.d = z + diff                     [7]
+#
+# and we can again ask whether
+#
+#     z'.n - z'.o = x.n                           [8]
+#
+# If so, we're done.  If not, the tzinfo class is insane, according to the
+# assumptions we've made.  This also requires a bit of proof.  As before, let's
+# compute the difference between the LHS and RHS of [8] (and skipping some of
+# the justifications for the kinds of substitutions we've done several times
+# already):
+#
+#     diff' = x.n - (z'.n - z'.o) =           replacing z'.n via [7]
+#             x.n  - (z.n + diff - z'.o) =    replacing diff via [6]
+#             x.n - (z.n + x.n - (z.n - z.o) - z'.o) =
+#             x.n - z.n - x.n + z.n - z.o + z'.o =    cancel x.n
+#             - z.n + z.n - z.o + z'.o =              cancel z.n
+#             - z.o + z'.o =                      #1 twice
+#             -z.s - z.d + z'.s + z'.d =          z and z' have same tzinfo
+#             z'.d - z.d
+#
+# So z' is UTC-equivalent to x iff z'.d = z.d at this point.  If they are equal,
+# we've found the UTC-equivalent so are done.  In fact, we stop with [7] and
+# return z', not bothering to compute z'.d.
+#
+# How could z.d and z'd differ?  z' = z + z.d [7], so merely moving z' by
+# a dst() offset, and starting *from* a time already in DST (we know z.d != 0),
+# would have to change the result dst() returns:  we start in DST, and moving
+# a little further into it takes us out of DST.
+#
+# There isn't a sane case where this can happen.  The closest it gets is at
+# the end of DST, where there's an hour in UTC with no spelling in a hybrid
+# tzinfo class.  In US Eastern, that's 5:MM UTC = 0:MM EST = 1:MM EDT.  During
+# that hour, on an Eastern clock 1:MM is taken as being in standard time (6:MM
+# UTC) because the docs insist on that, but 0:MM is taken as being in daylight
+# time (4:MM UTC).  There is no local time mapping to 5:MM UTC.  The local
+# clock jumps from 1:59 back to 1:00 again, and repeats the 1:MM hour in
+# standard time.  Since that's what the local clock *does*, we want to map both
+# UTC hours 5:MM and 6:MM to 1:MM Eastern.  The result is ambiguous
+# in local time, but so it goes -- it's the way the local clock works.
+#
+# When x = 5:MM UTC is the input to this algorithm, x.o=0, y.o=-5 and y.d=0,
+# so z=0:MM.  z.d=60 (minutes) then, so [5] doesn't hold and we keep going.
+# z' = z + z.d = 1:MM then, and z'.d=0, and z'.d - z.d = -60 != 0 so [8]
+# (correctly) concludes that z' is not UTC-equivalent to x.
+#
+# Because we know z.d said z was in daylight time (else [5] would have held and
+# we would have stopped then), and we know z.d != z'.d (else [8] would have held
+# and we have stopped then), and there are only 2 possible values dst() can
+# return in Eastern, it follows that z'.d must be 0 (which it is in the example,
+# but the reasoning doesn't depend on the example -- it depends on there being
+# two possible dst() outcomes, one zero and the other non-zero).  Therefore
+# z' must be in standard time, and is the spelling we want in this case.
+#
+# Note again that z' is not UTC-equivalent as far as the hybrid tzinfo class is
+# concerned (because it takes z' as being in standard time rather than the
+# daylight time we intend here), but returning it gives the real-life "local
+# clock repeats an hour" behavior when mapping the "unspellable" UTC hour into
+# tz.
+#
+# When the input is 6:MM, z=1:MM and z.d=0, and we stop at once, again with
+# the 1:MM standard time spelling we want.
+#
+# So how can this break?  One of the assumptions must be violated.  Two
+# possibilities:
+#
+# 1) [2] effectively says that y.s is invariant across all y belong to a given
+#    time zone.  This isn't true if, for political reasons or continental drift,
+#    a region decides to change its base offset from UTC.
+#
+# 2) There may be versions of "double daylight" time where the tail end of
+#    the analysis gives up a step too early.  I haven't thought about that
+#    enough to say.
+#
+# In any case, it's clear that the default fromutc() is strong enough to handle
+# "almost all" time zones:  so long as the standard offset is invariant, it
+# doesn't matter if daylight time transition points change from year to year, or
+# if daylight time is skipped in some years; it doesn't matter how large or
+# small dst() may get within its bounds; and it doesn't even matter if some
+# perverse time zone returns a negative dst()).  So a breaking case must be
+# pretty bizarre, and a tzinfo subclass can override fromutc() if it is.
diff --git a/contrib/tools/python3/src/Lib/_pydecimal.py b/contrib/tools/python3/src/Lib/_pydecimal.py
index f9d6c9901f..2692f2fcba 100644
--- a/contrib/tools/python3/src/Lib/_pydecimal.py
+++ b/contrib/tools/python3/src/Lib/_pydecimal.py
@@ -159,7 +159,7 @@ import sys
 
 try:
     from collections import namedtuple as _namedtuple
-    DecimalTuple = _namedtuple('DecimalTuple', 'sign digits exponent')
+    DecimalTuple = _namedtuple('DecimalTuple', 'sign digits exponent', module='decimal')
 except ImportError:
     DecimalTuple = lambda *args: args
 
diff --git a/contrib/tools/python3/src/Lib/_pyio.py b/contrib/tools/python3/src/Lib/_pyio.py
index 16d025b170..9641d43101 100644
--- a/contrib/tools/python3/src/Lib/_pyio.py
+++ b/contrib/tools/python3/src/Lib/_pyio.py
@@ -303,22 +303,6 @@ except AttributeError:
     open_code = _open_code_with_warning
 
 
-def __getattr__(name):
-    if name == "OpenWrapper":
-        # bpo-43680: Until Python 3.9, _pyio.open was not a static method and
-        # builtins.open was set to OpenWrapper to not become a bound method
-        # when set to a class variable. _io.open is a built-in function whereas
-        # _pyio.open is a Python function. In Python 3.10, _pyio.open() is now
-        # a static method, and builtins.open() is now io.open().
-        import warnings
-        warnings.warn('OpenWrapper is deprecated, use open instead',
-                      DeprecationWarning, stacklevel=2)
-        global OpenWrapper
-        OpenWrapper = open
-        return OpenWrapper
-    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
-
-
 # In normal operation, both `UnsupportedOperation`s should be bound to the
 # same object.
 try:
@@ -654,10 +638,7 @@ class RawIOBase(IOBase):
     def readall(self):
         """Read until EOF, using multiple read() call."""
         res = bytearray()
-        while True:
-            data = self.read(DEFAULT_BUFFER_SIZE)
-            if not data:
-                break
+        while data := self.read(DEFAULT_BUFFER_SIZE):
             res += data
         if res:
             return bytes(res)
@@ -1145,6 +1126,7 @@ class BufferedReader(_BufferedIOMixin):
         do at most one raw read to satisfy it.  We never return more
         than self.buffer_size.
         """
+        self._checkClosed("peek of closed file")
         with self._read_lock:
             return self._peek_unlocked(size)
 
@@ -1163,6 +1145,7 @@ class BufferedReader(_BufferedIOMixin):
         """Reads up to size bytes, with at most one read() system call."""
         # Returns up to size bytes.  If at least one byte is buffered, we
         # only return buffered bytes.  Otherwise, we do one raw read.
+        self._checkClosed("read of closed file")
         if size < 0:
             size = self.buffer_size
         if size == 0:
@@ -1180,6 +1163,8 @@ class BufferedReader(_BufferedIOMixin):
     def _readinto(self, buf, read1):
         """Read data into *buf* with at most one system call."""
 
+        self._checkClosed("readinto of closed file")
+
         # Need to create a memoryview object of type 'b', otherwise
         # we may not be able to assign bytes to it, and slicing it
         # would create a new object.
@@ -1229,6 +1214,7 @@ class BufferedReader(_BufferedIOMixin):
     def seek(self, pos, whence=0):
         if whence not in valid_seek_flags:
             raise ValueError("invalid whence value")
+        self._checkClosed("seek of closed file")
         with self._read_lock:
             if whence == 1:
                 pos -= len(self._read_buf) - self._read_pos
diff --git a/contrib/tools/python3/src/Lib/_pylong.py b/contrib/tools/python3/src/Lib/_pylong.py
new file mode 100644
index 0000000000..936346e187
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/_pylong.py
@@ -0,0 +1,285 @@
+"""Python implementations of some algorithms for use by longobject.c.
+The goal is to provide asymptotically faster algorithms that can be
+used for operations on integers with many digits.  In those cases, the
+performance overhead of the Python implementation is not significant
+since the asymptotic behavior is what dominates runtime. Functions
+provided by this module should be considered private and not part of any
+public API.
+
+Note: for ease of maintainability, please prefer clear code and avoid
+"micro-optimizations".  This module will only be imported and used for
+integers with a huge number of digits.  Saving a few microseconds with
+tricky or non-obvious code is not worth it.  For people looking for
+maximum performance, they should use something like gmpy2."""
+
+import re
+import decimal
+
+
+def int_to_decimal(n):
+    """Asymptotically fast conversion of an 'int' to Decimal."""
+
+    # Function due to Tim Peters.  See GH issue #90716 for details.
+    # https://github.com/python/cpython/issues/90716
+    #
+    # The implementation in longobject.c of base conversion algorithms
+    # between power-of-2 and non-power-of-2 bases are quadratic time.
+    # This function implements a divide-and-conquer algorithm that is
+    # faster for large numbers.  Builds an equal decimal.Decimal in a
+    # "clever" recursive way.  If we want a string representation, we
+    # apply str to _that_.
+
+    D = decimal.Decimal
+    D2 = D(2)
+
+    BITLIM = 128
+
+    mem = {}
+
+    def w2pow(w):
+        """Return D(2)**w and store the result. Also possibly save some
+        intermediate results. In context, these are likely to be reused
+        across various levels of the conversion to Decimal."""
+        if (result := mem.get(w)) is None:
+            if w <= BITLIM:
+                result = D2**w
+            elif w - 1 in mem:
+                result = (t := mem[w - 1]) + t
+            else:
+                w2 = w >> 1
+                # If w happens to be odd, w-w2 is one larger then w2
+                # now. Recurse on the smaller first (w2), so that it's
+                # in the cache and the larger (w-w2) can be handled by
+                # the cheaper `w-1 in mem` branch instead.
+                result = w2pow(w2) * w2pow(w - w2)
+            mem[w] = result
+        return result
+
+    def inner(n, w):
+        if w <= BITLIM:
+            return D(n)
+        w2 = w >> 1
+        hi = n >> w2
+        lo = n - (hi << w2)
+        return inner(lo, w2) + inner(hi, w - w2) * w2pow(w2)
+
+    with decimal.localcontext() as ctx:
+        ctx.prec = decimal.MAX_PREC
+        ctx.Emax = decimal.MAX_EMAX
+        ctx.Emin = decimal.MIN_EMIN
+        ctx.traps[decimal.Inexact] = 1
+
+        if n < 0:
+            negate = True
+            n = -n
+        else:
+            negate = False
+        result = inner(n, n.bit_length())
+        if negate:
+            result = -result
+    return result
+
+
+def int_to_decimal_string(n):
+    """Asymptotically fast conversion of an 'int' to a decimal string."""
+    return str(int_to_decimal(n))
+
+
+def _str_to_int_inner(s):
+    """Asymptotically fast conversion of a 'str' to an 'int'."""
+
+    # Function due to Bjorn Martinsson.  See GH issue #90716 for details.
+    # https://github.com/python/cpython/issues/90716
+    #
+    # The implementation in longobject.c of base conversion algorithms
+    # between power-of-2 and non-power-of-2 bases are quadratic time.
+    # This function implements a divide-and-conquer algorithm making use
+    # of Python's built in big int multiplication. Since Python uses the
+    # Karatsuba algorithm for multiplication, the time complexity
+    # of this function is O(len(s)**1.58).
+
+    DIGLIM = 2048
+
+    mem = {}
+
+    def w5pow(w):
+        """Return 5**w and store the result.
+        Also possibly save some intermediate results. In context, these
+        are likely to be reused across various levels of the conversion
+        to 'int'.
+        """
+        if (result := mem.get(w)) is None:
+            if w <= DIGLIM:
+                result = 5**w
+            elif w - 1 in mem:
+                result = mem[w - 1] * 5
+            else:
+                w2 = w >> 1
+                # If w happens to be odd, w-w2 is one larger then w2
+                # now. Recurse on the smaller first (w2), so that it's
+                # in the cache and the larger (w-w2) can be handled by
+                # the cheaper `w-1 in mem` branch instead.
+                result = w5pow(w2) * w5pow(w - w2)
+            mem[w] = result
+        return result
+
+    def inner(a, b):
+        if b - a <= DIGLIM:
+            return int(s[a:b])
+        mid = (a + b + 1) >> 1
+        return inner(mid, b) + ((inner(a, mid) * w5pow(b - mid)) << (b - mid))
+
+    return inner(0, len(s))
+
+
+def int_from_string(s):
+    """Asymptotically fast version of PyLong_FromString(), conversion
+    of a string of decimal digits into an 'int'."""
+    # PyLong_FromString() has already removed leading +/-, checked for invalid
+    # use of underscore characters, checked that string consists of only digits
+    # and underscores, and stripped leading whitespace.  The input can still
+    # contain underscores and have trailing whitespace.
+    s = s.rstrip().replace('_', '')
+    return _str_to_int_inner(s)
+
+
+def str_to_int(s):
+    """Asymptotically fast version of decimal string to 'int' conversion."""
+    # FIXME: this doesn't support the full syntax that int() supports.
+    m = re.match(r'\s*([+-]?)([0-9_]+)\s*', s)
+    if not m:
+        raise ValueError('invalid literal for int() with base 10')
+    v = int_from_string(m.group(2))
+    if m.group(1) == '-':
+        v = -v
+    return v
+
+
+# Fast integer division, based on code from Mark Dickinson, fast_div.py
+# GH-47701. Additional refinements and optimizations by Bjorn Martinsson.  The
+# algorithm is due to Burnikel and Ziegler, in their paper "Fast Recursive
+# Division".
+
+_DIV_LIMIT = 4000
+
+
+def _div2n1n(a, b, n):
+    """Divide a 2n-bit nonnegative integer a by an n-bit positive integer
+    b, using a recursive divide-and-conquer algorithm.
+
+    Inputs:
+      n is a positive integer
+      b is a positive integer with exactly n bits
+      a is a nonnegative integer such that a < 2**n * b
+
+    Output:
+      (q, r) such that a = b*q+r and 0 <= r < b.
+
+    """
+    if a.bit_length() - n <= _DIV_LIMIT:
+        return divmod(a, b)
+    pad = n & 1
+    if pad:
+        a <<= 1
+        b <<= 1
+        n += 1
+    half_n = n >> 1
+    mask = (1 << half_n) - 1
+    b1, b2 = b >> half_n, b & mask
+    q1, r = _div3n2n(a >> n, (a >> half_n) & mask, b, b1, b2, half_n)
+    q2, r = _div3n2n(r, a & mask, b, b1, b2, half_n)
+    if pad:
+        r >>= 1
+    return q1 << half_n | q2, r
+
+
+def _div3n2n(a12, a3, b, b1, b2, n):
+    """Helper function for _div2n1n; not intended to be called directly."""
+    if a12 >> n == b1:
+        q, r = (1 << n) - 1, a12 - (b1 << n) + b1
+    else:
+        q, r = _div2n1n(a12, b1, n)
+    r = (r << n | a3) - q * b2
+    while r < 0:
+        q -= 1
+        r += b
+    return q, r
+
+
+def _int2digits(a, n):
+    """Decompose non-negative int a into base 2**n
+
+    Input:
+      a is a non-negative integer
+
+    Output:
+      List of the digits of a in base 2**n in little-endian order,
+      meaning the most significant digit is last. The most
+      significant digit is guaranteed to be non-zero.
+      If a is 0 then the output is an empty list.
+
+    """
+    a_digits = [0] * ((a.bit_length() + n - 1) // n)
+
+    def inner(x, L, R):
+        if L + 1 == R:
+            a_digits[L] = x
+            return
+        mid = (L + R) >> 1
+        shift = (mid - L) * n
+        upper = x >> shift
+        lower = x ^ (upper << shift)
+        inner(lower, L, mid)
+        inner(upper, mid, R)
+
+    if a:
+        inner(a, 0, len(a_digits))
+    return a_digits
+
+
+def _digits2int(digits, n):
+    """Combine base-2**n digits into an int. This function is the
+    inverse of `_int2digits`. For more details, see _int2digits.
+    """
+
+    def inner(L, R):
+        if L + 1 == R:
+            return digits[L]
+        mid = (L + R) >> 1
+        shift = (mid - L) * n
+        return (inner(mid, R) << shift) + inner(L, mid)
+
+    return inner(0, len(digits)) if digits else 0
+
+
+def _divmod_pos(a, b):
+    """Divide a non-negative integer a by a positive integer b, giving
+    quotient and remainder."""
+    # Use grade-school algorithm in base 2**n, n = nbits(b)
+    n = b.bit_length()
+    a_digits = _int2digits(a, n)
+
+    r = 0
+    q_digits = []
+    for a_digit in reversed(a_digits):
+        q_digit, r = _div2n1n((r << n) + a_digit, b, n)
+        q_digits.append(q_digit)
+    q_digits.reverse()
+    q = _digits2int(q_digits, n)
+    return q, r
+
+
+def int_divmod(a, b):
+    """Asymptotically fast replacement for divmod, for 'int'.
+    Its time complexity is O(n**1.58), where n = #bits(a) + #bits(b).
+    """
+    if b == 0:
+        raise ZeroDivisionError
+    elif b < 0:
+        q, r = int_divmod(-a, -b)
+        return q, -r
+    elif a < 0:
+        q, r = int_divmod(~a, b)
+        return ~q, b + ~r
+    else:
+        return _divmod_pos(a, b)
diff --git a/contrib/tools/python3/src/Lib/_strptime.py b/contrib/tools/python3/src/Lib/_strptime.py
index 602059fb0e..798cf9f9d3 100644
--- a/contrib/tools/python3/src/Lib/_strptime.py
+++ b/contrib/tools/python3/src/Lib/_strptime.py
@@ -290,22 +290,6 @@ def _calc_julian_from_U_or_W(year, week_of_year, day_of_week, week_starts_Mon):
         return 1 + days_to_week + day_of_week
 
 
-def _calc_julian_from_V(iso_year, iso_week, iso_weekday):
-    """Calculate the Julian day based on the ISO 8601 year, week, and weekday.
-    ISO weeks start on Mondays, with week 01 being the week containing 4 Jan.
-    ISO week days range from 1 (Monday) to 7 (Sunday).
-    """
-    correction = datetime_date(iso_year, 1, 4).isoweekday() + 3
-    ordinal = (iso_week * 7) + iso_weekday - correction
-    # ordinal may be negative or 0 now, which means the date is in the previous
-    # calendar year
-    if ordinal < 1:
-        ordinal += datetime_date(iso_year, 1, 1).toordinal()
-        iso_year -= 1
-        ordinal -= datetime_date(iso_year, 1, 1).toordinal()
-    return iso_year, ordinal
-
-
 def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
     """Return a 2-tuple consisting of a time struct and an int containing
     the number of microseconds based on the input string and the
@@ -481,7 +465,8 @@ def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
                     else:
                         tz = value
                         break
-    # Deal with the cases where ambiguities arize
+
+    # Deal with the cases where ambiguities arise
     # don't assume default values for ISO week/year
     if iso_year is not None:
         if julian is not None:
@@ -510,7 +495,6 @@ def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
         else:
             year = 1900
 
-
     # If we know the week of the year and what day of that week, we can figure
     # out the Julian day of the year.
     if julian is None and weekday is not None:
@@ -519,7 +503,10 @@ def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
             julian = _calc_julian_from_U_or_W(year, week_of_year, weekday,
                                                 week_starts_Mon)
         elif iso_year is not None and iso_week is not None:
-            year, julian = _calc_julian_from_V(iso_year, iso_week, weekday + 1)
+            datetime_result = datetime_date.fromisocalendar(iso_year, iso_week, weekday + 1)
+            year = datetime_result.year
+            month = datetime_result.month
+            day = datetime_result.day
         if julian is not None and julian <= 0:
             year -= 1
             yday = 366 if calendar.isleap(year) else 365
diff --git a/contrib/tools/python3/src/Lib/argparse.py b/contrib/tools/python3/src/Lib/argparse.py
index a999ea6061..484a1efde4 100644
--- a/contrib/tools/python3/src/Lib/argparse.py
+++ b/contrib/tools/python3/src/Lib/argparse.py
@@ -345,21 +345,22 @@ class HelpFormatter(object):
                 def get_lines(parts, indent, prefix=None):
                     lines = []
                     line = []
+                    indent_length = len(indent)
                     if prefix is not None:
                         line_len = len(prefix) - 1
                     else:
-                        line_len = len(indent) - 1
+                        line_len = indent_length - 1
                     for part in parts:
                         if line_len + 1 + len(part) > text_width and line:
                             lines.append(indent + ' '.join(line))
                             line = []
-                            line_len = len(indent) - 1
+                            line_len = indent_length - 1
                         line.append(part)
                         line_len += len(part) + 1
                     if line:
                         lines.append(indent + ' '.join(line))
                     if prefix is not None:
-                        lines[0] = lines[0][len(indent):]
+                        lines[0] = lines[0][indent_length:]
                     return lines
 
                 # if prog is short, follow it with optionals or positionals
@@ -882,16 +883,19 @@ class Action(_AttributeHolder):
         raise NotImplementedError(_('.__call__() not defined'))
 
 
+# FIXME: remove together with `BooleanOptionalAction` deprecated arguments.
+_deprecated_default = object()
+
 class BooleanOptionalAction(Action):
     def __init__(self,
                  option_strings,
                  dest,
                  default=None,
-                 type=None,
-                 choices=None,
+                 type=_deprecated_default,
+                 choices=_deprecated_default,
                  required=False,
                  help=None,
-                 metavar=None):
+                 metavar=_deprecated_default):
 
         _option_strings = []
         for option_string in option_strings:
@@ -901,6 +905,24 @@ class BooleanOptionalAction(Action):
                 option_string = '--no-' + option_string[2:]
                 _option_strings.append(option_string)
 
+        # We need `_deprecated` special value to ban explicit arguments that
+        # match default value. Like:
+        #   parser.add_argument('-f', action=BooleanOptionalAction, type=int)
+        for field_name in ('type', 'choices', 'metavar'):
+            if locals()[field_name] is not _deprecated_default:
+                warnings._deprecated(
+                    field_name,
+                    "{name!r} is deprecated as of Python 3.12 and will be "
+                    "removed in Python {remove}.",
+                    remove=(3, 14))
+
+        if type is _deprecated_default:
+            type = None
+        if choices is _deprecated_default:
+            choices = None
+        if metavar is _deprecated_default:
+            metavar = None
+
         super().__init__(
             option_strings=_option_strings,
             dest=dest,
@@ -2172,7 +2194,9 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
             # replace arguments referencing files with the file content
             else:
                 try:
-                    with open(arg_string[1:]) as args_file:
+                    with open(arg_string[1:],
+                              encoding=_sys.getfilesystemencoding(),
+                              errors=_sys.getfilesystemencodeerrors()) as args_file:
                         arg_strings = []
                         for arg_line in args_file.read().splitlines():
                             for arg in self.convert_arg_line_to_args(arg_line):
@@ -2486,9 +2510,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
               not action.option_strings):
             if action.default is not None:
                 value = action.default
+                self._check_value(action, value)
             else:
+                # since arg_strings is always [] at this point
+                # there is no need to use self._check_value(action, value)
                 value = arg_strings
-            self._check_value(action, value)
 
         # single argument or optional argument produces a single value
         elif len(arg_strings) == 1 and action.nargs in [None, OPTIONAL]:
@@ -2530,7 +2556,6 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
 
         # ArgumentTypeErrors indicate errors
         except ArgumentTypeError as err:
-            name = getattr(action.type, '__name__', repr(action.type))
             msg = str(err)
             raise ArgumentError(action, msg)
 
diff --git a/contrib/tools/python3/src/Lib/ast.py b/contrib/tools/python3/src/Lib/ast.py
index d84d75e1f3..de940d2e9c 100644
--- a/contrib/tools/python3/src/Lib/ast.py
+++ b/contrib/tools/python3/src/Lib/ast.py
@@ -25,6 +25,7 @@
     :license: Python License.
 """
 import sys
+import re
 from _ast import *
 from contextlib import contextmanager, nullcontext
 from enum import IntEnum, auto, _simple_enum
@@ -40,12 +41,13 @@ def parse(source, filename='<unknown>', mode='exec', *,
     flags = PyCF_ONLY_AST
     if type_comments:
         flags |= PyCF_TYPE_COMMENTS
-    if isinstance(feature_version, tuple):
+    if feature_version is None:
+        feature_version = -1
+    elif isinstance(feature_version, tuple):
         major, minor = feature_version  # Should be a 2-tuple.
-        assert major == 3
+        if major != 3:
+            raise ValueError(f"Unsupported major version: {major}")
         feature_version = minor
-    elif feature_version is None:
-        feature_version = -1
     # Else it should be an int giving the minor version for 3.x.
     return compile(source, filename, mode, flags,
                    _feature_version=feature_version)
@@ -292,9 +294,7 @@ def get_docstring(node, clean=True):
     if not(node.body and isinstance(node.body[0], Expr)):
         return None
     node = node.body[0].value
-    if isinstance(node, Str):
-        text = node.s
-    elif isinstance(node, Constant) and isinstance(node.value, str):
+    if isinstance(node, Constant) and isinstance(node.value, str):
         text = node.value
     else:
         return None
@@ -304,28 +304,17 @@ def get_docstring(node, clean=True):
     return text
 
 
-def _splitlines_no_ff(source):
+_line_pattern = re.compile(r"(.*?(?:\r\n|\n|\r|$))")
+def _splitlines_no_ff(source, maxlines=None):
     """Split a string into lines ignoring form feed and other chars.
 
     This mimics how the Python parser splits source code.
     """
-    idx = 0
     lines = []
-    next_line = ''
-    while idx < len(source):
-        c = source[idx]
-        next_line += c
-        idx += 1
-        # Keep \r\n together
-        if c == '\r' and idx < len(source) and source[idx] == '\n':
-            next_line += '\n'
-            idx += 1
-        if c in '\r\n':
-            lines.append(next_line)
-            next_line = ''
-
-    if next_line:
-        lines.append(next_line)
+    for lineno, match in enumerate(_line_pattern.finditer(source), 1):
+        if maxlines is not None and lineno > maxlines:
+            break
+        lines.append(match[0])
     return lines
 
 
@@ -359,7 +348,7 @@ def get_source_segment(source, node, *, padded=False):
     except AttributeError:
         return None
 
-    lines = _splitlines_no_ff(source)
+    lines = _splitlines_no_ff(source, maxlines=end_lineno+1)
     if end_lineno == lineno:
         return lines[lineno].encode()[col_offset:end_col_offset].decode()
 
@@ -508,20 +497,52 @@ class NodeTransformer(NodeVisitor):
         return node
 
 
+_DEPRECATED_VALUE_ALIAS_MESSAGE = (
+    "{name} is deprecated and will be removed in Python {remove}; use value instead"
+)
+_DEPRECATED_CLASS_MESSAGE = (
+    "{name} is deprecated and will be removed in Python {remove}; "
+    "use ast.Constant instead"
+)
+
+
 # If the ast module is loaded more than once, only add deprecated methods once
 if not hasattr(Constant, 'n'):
     # The following code is for backward compatibility.
     # It will be removed in future.
 
-    def _getter(self):
+    def _n_getter(self):
+        """Deprecated. Use value instead."""
+        import warnings
+        warnings._deprecated(
+            "Attribute n", message=_DEPRECATED_VALUE_ALIAS_MESSAGE, remove=(3, 14)
+        )
+        return self.value
+
+    def _n_setter(self, value):
+        import warnings
+        warnings._deprecated(
+            "Attribute n", message=_DEPRECATED_VALUE_ALIAS_MESSAGE, remove=(3, 14)
+        )
+        self.value = value
+
+    def _s_getter(self):
         """Deprecated. Use value instead."""
+        import warnings
+        warnings._deprecated(
+            "Attribute s", message=_DEPRECATED_VALUE_ALIAS_MESSAGE, remove=(3, 14)
+        )
         return self.value
 
-    def _setter(self, value):
+    def _s_setter(self, value):
+        import warnings
+        warnings._deprecated(
+            "Attribute s", message=_DEPRECATED_VALUE_ALIAS_MESSAGE, remove=(3, 14)
+        )
         self.value = value
 
-    Constant.n = property(_getter, _setter)
-    Constant.s = property(_getter, _setter)
+    Constant.n = property(_n_getter, _n_setter)
+    Constant.s = property(_s_getter, _s_setter)
 
 class _ABC(type):
 
@@ -529,6 +550,13 @@ class _ABC(type):
         cls.__doc__ = """Deprecated AST node class. Use ast.Constant instead"""
 
     def __instancecheck__(cls, inst):
+        if cls in _const_types:
+            import warnings
+            warnings._deprecated(
+                f"ast.{cls.__qualname__}",
+                message=_DEPRECATED_CLASS_MESSAGE,
+                remove=(3, 14)
+            )
         if not isinstance(inst, Constant):
             return False
         if cls in _const_types:
@@ -552,6 +580,10 @@ def _new(cls, *args, **kwargs):
         if pos < len(args):
             raise TypeError(f"{cls.__name__} got multiple values for argument {key!r}")
     if cls in _const_types:
+        import warnings
+        warnings._deprecated(
+            f"ast.{cls.__qualname__}", message=_DEPRECATED_CLASS_MESSAGE, remove=(3, 14)
+        )
         return Constant(*args, **kwargs)
     return Constant.__new__(cls, *args, **kwargs)
 
@@ -574,10 +606,19 @@ class Ellipsis(Constant, metaclass=_ABC):
     _fields = ()
 
     def __new__(cls, *args, **kwargs):
-        if cls is Ellipsis:
+        if cls is _ast_Ellipsis:
+            import warnings
+            warnings._deprecated(
+                "ast.Ellipsis", message=_DEPRECATED_CLASS_MESSAGE, remove=(3, 14)
+            )
             return Constant(..., *args, **kwargs)
         return Constant.__new__(cls, *args, **kwargs)
 
+# Keep another reference to Ellipsis in the global namespace
+# so it can be referenced in Ellipsis.__new__
+# (The original "Ellipsis" name is removed from the global namespace later on)
+_ast_Ellipsis = Ellipsis
+
 _const_types = {
     Num: (int, float, complex),
     Str: (str,),
@@ -1010,6 +1051,8 @@ class _Unparser(NodeVisitor):
             self.fill("@")
             self.traverse(deco)
         self.fill("class " + node.name)
+        if hasattr(node, "type_params"):
+            self._type_params_helper(node.type_params)
         with self.delimit_if("(", ")", condition = node.bases or node.keywords):
             comma = False
             for e in node.bases:
@@ -1041,6 +1084,8 @@ class _Unparser(NodeVisitor):
             self.traverse(deco)
         def_str = fill_suffix + " " + node.name
         self.fill(def_str)
+        if hasattr(node, "type_params"):
+            self._type_params_helper(node.type_params)
         with self.delimit("(", ")"):
             self.traverse(node.args)
         if node.returns:
@@ -1049,6 +1094,30 @@ class _Unparser(NodeVisitor):
         with self.block(extra=self.get_type_comment(node)):
             self._write_docstring_and_traverse_body(node)
 
+    def _type_params_helper(self, type_params):
+        if type_params is not None and len(type_params) > 0:
+            with self.delimit("[", "]"):
+                self.interleave(lambda: self.write(", "), self.traverse, type_params)
+
+    def visit_TypeVar(self, node):
+        self.write(node.name)
+        if node.bound:
+            self.write(": ")
+            self.traverse(node.bound)
+
+    def visit_TypeVarTuple(self, node):
+        self.write("*" + node.name)
+
+    def visit_ParamSpec(self, node):
+        self.write("**" + node.name)
+
+    def visit_TypeAlias(self, node):
+        self.fill("type ")
+        self.traverse(node.name)
+        self._type_params_helper(node.type_params)
+        self.write(" = ")
+        self.traverse(node.value)
+
     def visit_For(self, node):
         self._for_helper("for ", node)
 
@@ -1154,17 +1223,7 @@ class _Unparser(NodeVisitor):
 
     def visit_JoinedStr(self, node):
         self.write("f")
-        if self._avoid_backslashes:
-            with self.buffered() as buffer:
-                self._write_fstring_inner(node)
-            return self._write_str_avoiding_backslashes("".join(buffer))
-
-        # If we don't need to avoid backslashes globally (i.e., we only need
-        # to avoid them inside FormattedValues), it's cosmetically preferred
-        # to use escaped whitespace. That is, it's preferred to use backslashes
-        # for cases like: f"{x}\n". To accomplish this, we keep track of what
-        # in our buffer corresponds to FormattedValues and what corresponds to
-        # Constant parts of the f-string, and allow escapes accordingly.
+
         fstring_parts = []
         for value in node.values:
             with self.buffered() as buffer:
@@ -1177,16 +1236,20 @@ class _Unparser(NodeVisitor):
         quote_types = list(_ALL_QUOTES)
         fallback_to_repr = False
         for value, is_constant in fstring_parts:
-            value, new_quote_types = self._str_literal_helper(
-                value,
-                quote_types=quote_types,
-                escape_special_whitespace=is_constant,
-            )
+            if is_constant:
+                value, new_quote_types = self._str_literal_helper(
+                    value,
+                    quote_types=quote_types,
+                    escape_special_whitespace=True,
+                )
+                if set(new_quote_types).isdisjoint(quote_types):
+                    fallback_to_repr = True
+                    break
+                quote_types = new_quote_types
+            elif "\n" in value:
+                quote_types = [q for q in quote_types if q in _MULTI_QUOTES]
+                assert quote_types
             new_fstring_parts.append(value)
-            if set(new_quote_types).isdisjoint(quote_types):
-                fallback_to_repr = True
-                break
-            quote_types = new_quote_types
 
         if fallback_to_repr:
             # If we weren't able to find a quote type that works for all parts
@@ -1194,22 +1257,26 @@ class _Unparser(NodeVisitor):
             quote_types = ["'''"]
             new_fstring_parts.clear()
             for value, is_constant in fstring_parts:
-                value = repr('"' + value)  # force repr to use single quotes
-                expected_prefix = "'\""
-                assert value.startswith(expected_prefix), repr(value)
-                new_fstring_parts.append(value[len(expected_prefix):-1])
+                if is_constant:
+                    value = repr('"' + value)  # force repr to use single quotes
+                    expected_prefix = "'\""
+                    assert value.startswith(expected_prefix), repr(value)
+                    value = value[len(expected_prefix):-1]
+                new_fstring_parts.append(value)
 
         value = "".join(new_fstring_parts)
         quote_type = quote_types[0]
         self.write(f"{quote_type}{value}{quote_type}")
 
-    def _write_fstring_inner(self, node):
+    def _write_fstring_inner(self, node, scape_newlines=False):
         if isinstance(node, JoinedStr):
             # for both the f-string itself, and format_spec
             for value in node.values:
-                self._write_fstring_inner(value)
+                self._write_fstring_inner(value, scape_newlines=scape_newlines)
         elif isinstance(node, Constant) and isinstance(node.value, str):
             value = node.value.replace("{", "{{").replace("}", "}}")
+            if scape_newlines:
+                value = value.replace("\n", "\\n")
             self.write(value)
         elif isinstance(node, FormattedValue):
             self.visit_FormattedValue(node)
@@ -1218,16 +1285,12 @@ class _Unparser(NodeVisitor):
 
     def visit_FormattedValue(self, node):
         def unparse_inner(inner):
-            unparser = type(self)(_avoid_backslashes=True)
+            unparser = type(self)()
             unparser.set_precedence(_Precedence.TEST.next(), inner)
             return unparser.visit(inner)
 
         with self.delimit("{", "}"):
             expr = unparse_inner(node.value)
-            if "\\" in expr:
-                raise ValueError(
-                    "Unable to avoid backslash in f-string expression part"
-                )
             if expr.startswith("{"):
                 # Separate pair of opening brackets as "{ {"
                 self.write(" ")
@@ -1236,7 +1299,10 @@ class _Unparser(NodeVisitor):
                 self.write(f"!{chr(node.conversion)}")
             if node.format_spec:
                 self.write(":")
-                self._write_fstring_inner(node.format_spec)
+                self._write_fstring_inner(
+                    node.format_spec,
+                    scape_newlines=True
+                )
 
     def visit_Name(self, node):
         self.write(node.id)
@@ -1724,6 +1790,22 @@ def unparse(ast_obj):
     return unparser.visit(ast_obj)
 
 
+_deprecated_globals = {
+    name: globals().pop(name)
+    for name in ('Num', 'Str', 'Bytes', 'NameConstant', 'Ellipsis')
+}
+
+def __getattr__(name):
+    if name in _deprecated_globals:
+        globals()[name] = value = _deprecated_globals[name]
+        import warnings
+        warnings._deprecated(
+            f"ast.{name}", message=_DEPRECATED_CLASS_MESSAGE, remove=(3, 14)
+        )
+        return value
+    raise AttributeError(f"module 'ast' has no attribute '{name}'")
+
+
 def main():
     import argparse
 
diff --git a/contrib/tools/python3/src/Lib/asynchat.py b/contrib/tools/python3/src/Lib/asynchat.py
deleted file mode 100644
index bed797e989..0000000000
--- a/contrib/tools/python3/src/Lib/asynchat.py
+++ /dev/null
@@ -1,314 +0,0 @@
-# -*- Mode: Python; tab-width: 4 -*-
-#       Id: asynchat.py,v 2.26 2000/09/07 22:29:26 rushing Exp
-#       Author: Sam Rushing <rushing@nightmare.com>
-
-# ======================================================================
-# Copyright 1996 by Sam Rushing
-#
-#                         All Rights Reserved
-#
-# Permission to use, copy, modify, and distribute this software and
-# its documentation for any purpose and without fee is hereby
-# granted, provided that the above copyright notice appear in all
-# copies and that both that copyright notice and this permission
-# notice appear in supporting documentation, and that the name of Sam
-# Rushing not be used in advertising or publicity pertaining to
-# distribution of the software without specific, written prior
-# permission.
-#
-# SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
-# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
-# NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR
-# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
-# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
-# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-# ======================================================================
-
-r"""A class supporting chat-style (command/response) protocols.
-
-This class adds support for 'chat' style protocols - where one side
-sends a 'command', and the other sends a response (examples would be
-the common internet protocols - smtp, nntp, ftp, etc..).
-
-The handle_read() method looks at the input stream for the current
-'terminator' (usually '\r\n' for single-line responses, '\r\n.\r\n'
-for multi-line output), calling self.found_terminator() on its
-receipt.
-
-for example:
-Say you build an async nntp client using this class.  At the start
-of the connection, you'll have self.terminator set to '\r\n', in
-order to process the single-line greeting.  Just before issuing a
-'LIST' command you'll set it to '\r\n.\r\n'.  The output of the LIST
-command will be accumulated (using your own 'collect_incoming_data'
-method) up to the terminator, and then control will be returned to
-you - by calling your self.found_terminator() method.
-"""
-import asyncore
-from collections import deque
-
-from warnings import _deprecated
-
-_DEPRECATION_MSG = ('The {name} module is deprecated and will be removed in '
-                    'Python {remove}. The recommended replacement is asyncio')
-_deprecated(__name__, _DEPRECATION_MSG, remove=(3, 12))
-
-
-
-class async_chat(asyncore.dispatcher):
-    """This is an abstract class.  You must derive from this class, and add
-    the two methods collect_incoming_data() and found_terminator()"""
-
-    # these are overridable defaults
-
-    ac_in_buffer_size = 65536
-    ac_out_buffer_size = 65536
-
-    # we don't want to enable the use of encoding by default, because that is a
-    # sign of an application bug that we don't want to pass silently
-
-    use_encoding = 0
-    encoding = 'latin-1'
-
-    def __init__(self, sock=None, map=None):
-        # for string terminator matching
-        self.ac_in_buffer = b''
-
-        # we use a list here rather than io.BytesIO for a few reasons...
-        # del lst[:] is faster than bio.truncate(0)
-        # lst = [] is faster than bio.truncate(0)
-        self.incoming = []
-
-        # we toss the use of the "simple producer" and replace it with
-        # a pure deque, which the original fifo was a wrapping of
-        self.producer_fifo = deque()
-        asyncore.dispatcher.__init__(self, sock, map)
-
-    def collect_incoming_data(self, data):
-        raise NotImplementedError("must be implemented in subclass")
-
-    def _collect_incoming_data(self, data):
-        self.incoming.append(data)
-
-    def _get_data(self):
-        d = b''.join(self.incoming)
-        del self.incoming[:]
-        return d
-
-    def found_terminator(self):
-        raise NotImplementedError("must be implemented in subclass")
-
-    def set_terminator(self, term):
-        """Set the input delimiter.
-
-        Can be a fixed string of any length, an integer, or None.
-        """
-        if isinstance(term, str) and self.use_encoding:
-            term = bytes(term, self.encoding)
-        elif isinstance(term, int) and term < 0:
-            raise ValueError('the number of received bytes must be positive')
-        self.terminator = term
-
-    def get_terminator(self):
-        return self.terminator
-
-    # grab some more data from the socket,
-    # throw it to the collector method,
-    # check for the terminator,
-    # if found, transition to the next state.
-
-    def handle_read(self):
-
-        try:
-            data = self.recv(self.ac_in_buffer_size)
-        except BlockingIOError:
-            return
-        except OSError:
-            self.handle_error()
-            return
-
-        if isinstance(data, str) and self.use_encoding:
-            data = bytes(str, self.encoding)
-        self.ac_in_buffer = self.ac_in_buffer + data
-
-        # Continue to search for self.terminator in self.ac_in_buffer,
-        # while calling self.collect_incoming_data.  The while loop
-        # is necessary because we might read several data+terminator
-        # combos with a single recv(4096).
-
-        while self.ac_in_buffer:
-            lb = len(self.ac_in_buffer)
-            terminator = self.get_terminator()
-            if not terminator:
-                # no terminator, collect it all
-                self.collect_incoming_data(self.ac_in_buffer)
-                self.ac_in_buffer = b''
-            elif isinstance(terminator, int):
-                # numeric terminator
-                n = terminator
-                if lb < n:
-                    self.collect_incoming_data(self.ac_in_buffer)
-                    self.ac_in_buffer = b''
-                    self.terminator = self.terminator - lb
-                else:
-                    self.collect_incoming_data(self.ac_in_buffer[:n])
-                    self.ac_in_buffer = self.ac_in_buffer[n:]
-                    self.terminator = 0
-                    self.found_terminator()
-            else:
-                # 3 cases:
-                # 1) end of buffer matches terminator exactly:
-                #    collect data, transition
-                # 2) end of buffer matches some prefix:
-                #    collect data to the prefix
-                # 3) end of buffer does not match any prefix:
-                #    collect data
-                terminator_len = len(terminator)
-                index = self.ac_in_buffer.find(terminator)
-                if index != -1:
-                    # we found the terminator
-                    if index > 0:
-                        # don't bother reporting the empty string
-                        # (source of subtle bugs)
-                        self.collect_incoming_data(self.ac_in_buffer[:index])
-                    self.ac_in_buffer = self.ac_in_buffer[index+terminator_len:]
-                    # This does the Right Thing if the terminator
-                    # is changed here.
-                    self.found_terminator()
-                else:
-                    # check for a prefix of the terminator
-                    index = find_prefix_at_end(self.ac_in_buffer, terminator)
-                    if index:
-                        if index != lb:
-                            # we found a prefix, collect up to the prefix
-                            self.collect_incoming_data(self.ac_in_buffer[:-index])
-                            self.ac_in_buffer = self.ac_in_buffer[-index:]
-                        break
-                    else:
-                        # no prefix, collect it all
-                        self.collect_incoming_data(self.ac_in_buffer)
-                        self.ac_in_buffer = b''
-
-    def handle_write(self):
-        self.initiate_send()
-
-    def handle_close(self):
-        self.close()
-
-    def push(self, data):
-        if not isinstance(data, (bytes, bytearray, memoryview)):
-            raise TypeError('data argument must be byte-ish (%r)',
-                            type(data))
-        sabs = self.ac_out_buffer_size
-        if len(data) > sabs:
-            for i in range(0, len(data), sabs):
-                self.producer_fifo.append(data[i:i+sabs])
-        else:
-            self.producer_fifo.append(data)
-        self.initiate_send()
-
-    def push_with_producer(self, producer):
-        self.producer_fifo.append(producer)
-        self.initiate_send()
-
-    def readable(self):
-        "predicate for inclusion in the readable for select()"
-        # cannot use the old predicate, it violates the claim of the
-        # set_terminator method.
-
-        # return (len(self.ac_in_buffer) <= self.ac_in_buffer_size)
-        return 1
-
-    def writable(self):
-        "predicate for inclusion in the writable for select()"
-        return self.producer_fifo or (not self.connected)
-
-    def close_when_done(self):
-        "automatically close this channel once the outgoing queue is empty"
-        self.producer_fifo.append(None)
-
-    def initiate_send(self):
-        while self.producer_fifo and self.connected:
-            first = self.producer_fifo[0]
-            # handle empty string/buffer or None entry
-            if not first:
-                del self.producer_fifo[0]
-                if first is None:
-                    self.handle_close()
-                    return
-
-            # handle classic producer behavior
-            obs = self.ac_out_buffer_size
-            try:
-                data = first[:obs]
-            except TypeError:
-                data = first.more()
-                if data:
-                    self.producer_fifo.appendleft(data)
-                else:
-                    del self.producer_fifo[0]
-                continue
-
-            if isinstance(data, str) and self.use_encoding:
-                data = bytes(data, self.encoding)
-
-            # send the data
-            try:
-                num_sent = self.send(data)
-            except OSError:
-                self.handle_error()
-                return
-
-            if num_sent:
-                if num_sent < len(data) or obs < len(first):
-                    self.producer_fifo[0] = first[num_sent:]
-                else:
-                    del self.producer_fifo[0]
-            # we tried to send some actual data
-            return
-
-    def discard_buffers(self):
-        # Emergencies only!
-        self.ac_in_buffer = b''
-        del self.incoming[:]
-        self.producer_fifo.clear()
-
-
-class simple_producer:
-
-    def __init__(self, data, buffer_size=512):
-        self.data = data
-        self.buffer_size = buffer_size
-
-    def more(self):
-        if len(self.data) > self.buffer_size:
-            result = self.data[:self.buffer_size]
-            self.data = self.data[self.buffer_size:]
-            return result
-        else:
-            result = self.data
-            self.data = b''
-            return result
-
-
-# Given 'haystack', see if any prefix of 'needle' is at its end.  This
-# assumes an exact match has already been checked.  Return the number of
-# characters matched.
-# for example:
-# f_p_a_e("qwerty\r", "\r\n") => 1
-# f_p_a_e("qwertydkjf", "\r\n") => 0
-# f_p_a_e("qwerty\r\n", "\r\n") => <undefined>
-
-# this could maybe be made faster with a computed regex?
-# [answer: no; circa Python-2.0, Jan 2001]
-# new python:   28961/s
-# old python:   18307/s
-# re:        12820/s
-# regex:     14035/s
-
-def find_prefix_at_end(haystack, needle):
-    l = len(needle) - 1
-    while l and not haystack.endswith(needle[:l]):
-        l -= 1
-    return l
diff --git a/contrib/tools/python3/src/Lib/asyncio/__init__.py b/contrib/tools/python3/src/Lib/asyncio/__init__.py
index fed16ec7c6..03165a425e 100644
--- a/contrib/tools/python3/src/Lib/asyncio/__init__.py
+++ b/contrib/tools/python3/src/Lib/asyncio/__init__.py
@@ -34,6 +34,7 @@ __all__ = (base_events.__all__ +
            streams.__all__ +
            subprocess.__all__ +
            tasks.__all__ +
+           taskgroups.__all__ +
            threads.__all__ +
            timeouts.__all__ +
            transports.__all__)
diff --git a/contrib/tools/python3/src/Lib/asyncio/base_events.py b/contrib/tools/python3/src/Lib/asyncio/base_events.py
index 5fa28cae9c..c16c445bde 100644
--- a/contrib/tools/python3/src/Lib/asyncio/base_events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/base_events.py
@@ -306,7 +306,7 @@ class Server(events.AbstractServer):
         self._waiters = None
         for waiter in waiters:
             if not waiter.done():
-                waiter.set_result(waiter)
+                waiter.set_result(None)
 
     def _start_serving(self):
         if self._serving:
@@ -378,7 +378,27 @@ class Server(events.AbstractServer):
             self._serving_forever_fut = None
 
     async def wait_closed(self):
-        if self._sockets is None or self._waiters is None:
+        """Wait until server is closed and all connections are dropped.
+
+        - If the server is not closed, wait.
+        - If it is closed, but there are still active connections, wait.
+
+        Anyone waiting here will be unblocked once both conditions
+        (server is closed and all connections have been dropped)
+        have become true, in either order.
+
+        Historical note: In 3.11 and before, this was broken, returning
+        immediately if the server was already closed, even if there
+        were still active connections. An attempted fix in 3.12.0 was
+        still broken, returning immediately if the server was still
+        open and there were no active connections. Hopefully in 3.12.1
+        we have it right.
+        """
+        # Waiters are unblocked by self._wakeup(), which is called
+        # from two places: self.close() and self._detach(), but only
+        # when both conditions have become true. To signal that this
+        # has happened, self._wakeup() sets self._waiters to None.
+        if self._waiters is None:
             return
         waiter = self._loop.create_future()
         self._waiters.append(waiter)
@@ -562,8 +582,13 @@ class BaseEventLoop(events.AbstractEventLoop):
                     'asyncgen': agen
                 })
 
-    async def shutdown_default_executor(self):
-        """Schedule the shutdown of the default executor."""
+    async def shutdown_default_executor(self, timeout=None):
+        """Schedule the shutdown of the default executor.
+
+        The timeout parameter specifies the amount of time the executor will
+        be given to finish joining. The default value is None, which means
+        that the executor will be given an unlimited amount of time.
+        """
         self._executor_shutdown_called = True
         if self._default_executor is None:
             return
@@ -573,7 +598,13 @@ class BaseEventLoop(events.AbstractEventLoop):
         try:
             await future
         finally:
-            thread.join()
+            thread.join(timeout)
+
+        if thread.is_alive():
+            warnings.warn("The executor did not finishing joining "
+                             f"its threads within {timeout} seconds.",
+                             RuntimeWarning, stacklevel=2)
+            self._default_executor.shutdown(wait=False)
 
     def _do_shutdown(self, future):
         try:
@@ -992,7 +1023,8 @@ class BaseEventLoop(events.AbstractEventLoop):
             local_addr=None, server_hostname=None,
             ssl_handshake_timeout=None,
             ssl_shutdown_timeout=None,
-            happy_eyeballs_delay=None, interleave=None):
+            happy_eyeballs_delay=None, interleave=None,
+            all_errors=False):
         """Connect to a TCP server.
 
         Create a streaming transport connection to a given internet host and
@@ -1082,6 +1114,8 @@ class BaseEventLoop(events.AbstractEventLoop):
             if sock is None:
                 exceptions = [exc for sub in exceptions for exc in sub]
                 try:
+                    if all_errors:
+                        raise ExceptionGroup("create_connection failed", exceptions)
                     if len(exceptions) == 1:
                         raise exceptions[0]
                     else:
@@ -1819,7 +1853,22 @@ class BaseEventLoop(events.AbstractEventLoop):
                              exc_info=True)
         else:
             try:
-                self._exception_handler(self, context)
+                ctx = None
+                thing = context.get("task")
+                if thing is None:
+                    # Even though Futures don't have a context,
+                    # Task is a subclass of Future,
+                    # and sometimes the 'future' key holds a Task.
+                    thing = context.get("future")
+                if thing is None:
+                    # Handles also have a context.
+                    thing = context.get("handle")
+                if thing is not None and hasattr(thing, "get_context"):
+                    ctx = thing.get_context()
+                if ctx is not None and hasattr(ctx, "run"):
+                    ctx.run(self._exception_handler, self, context)
+                else:
+                    self._exception_handler(self, context)
             except (SystemExit, KeyboardInterrupt):
                 raise
             except BaseException as exc:
diff --git a/contrib/tools/python3/src/Lib/asyncio/base_futures.py b/contrib/tools/python3/src/Lib/asyncio/base_futures.py
index cd811a788c..7987963bd9 100644
--- a/contrib/tools/python3/src/Lib/asyncio/base_futures.py
+++ b/contrib/tools/python3/src/Lib/asyncio/base_futures.py
@@ -1,7 +1,6 @@
 __all__ = ()
 
 import reprlib
-from _thread import get_ident
 
 from . import format_helpers
 
diff --git a/contrib/tools/python3/src/Lib/asyncio/base_tasks.py b/contrib/tools/python3/src/Lib/asyncio/base_tasks.py
index 26298e638c..c907b68341 100644
--- a/contrib/tools/python3/src/Lib/asyncio/base_tasks.py
+++ b/contrib/tools/python3/src/Lib/asyncio/base_tasks.py
@@ -15,11 +15,13 @@ def _task_repr_info(task):
 
     info.insert(1, 'name=%r' % task.get_name())
 
-    coro = coroutines._format_coroutine(task._coro)
-    info.insert(2, f'coro=<{coro}>')
-
     if task._fut_waiter is not None:
-        info.insert(3, f'wait_for={task._fut_waiter!r}')
+        info.insert(2, f'wait_for={task._fut_waiter!r}')
+
+    if task._coro:
+        coro = coroutines._format_coroutine(task._coro)
+        info.insert(2, f'coro=<{coro}>')
+
     return info
 
 
diff --git a/contrib/tools/python3/src/Lib/asyncio/constants.py b/contrib/tools/python3/src/Lib/asyncio/constants.py
index 0ad997a921..b60c1e4236 100644
--- a/contrib/tools/python3/src/Lib/asyncio/constants.py
+++ b/contrib/tools/python3/src/Lib/asyncio/constants.py
@@ -30,6 +30,9 @@ SENDFILE_FALLBACK_READBUFFER_SIZE = 1024 * 256
 FLOW_CONTROL_HIGH_WATER_SSL_READ = 256  # KiB
 FLOW_CONTROL_HIGH_WATER_SSL_WRITE = 512  # KiB
 
+# Default timeout for joining the threads in the threadpool
+THREAD_JOIN_TIMEOUT = 300
+
 # The enum should be here to break circular dependencies between
 # base_events and sslproto
 class _SendfileMode(enum.Enum):
diff --git a/contrib/tools/python3/src/Lib/asyncio/coroutines.py b/contrib/tools/python3/src/Lib/asyncio/coroutines.py
index 0e4b489f30..ab4f30eb51 100644
--- a/contrib/tools/python3/src/Lib/asyncio/coroutines.py
+++ b/contrib/tools/python3/src/Lib/asyncio/coroutines.py
@@ -4,7 +4,6 @@ import collections.abc
 import inspect
 import os
 import sys
-import traceback
 import types
 
 
@@ -26,8 +25,7 @@ def iscoroutinefunction(func):
 
 # Prioritize native coroutine check to speed-up
 # asyncio.iscoroutine.
-_COROUTINE_TYPES = (types.CoroutineType, types.GeneratorType,
-                    collections.abc.Coroutine)
+_COROUTINE_TYPES = (types.CoroutineType, collections.abc.Coroutine)
 _iscoroutine_typecache = set()
 
 
diff --git a/contrib/tools/python3/src/Lib/asyncio/events.py b/contrib/tools/python3/src/Lib/asyncio/events.py
index cfc62156e4..016852880c 100644
--- a/contrib/tools/python3/src/Lib/asyncio/events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/events.py
@@ -17,6 +17,7 @@ __all__ = (
 
 import contextvars
 import os
+import signal
 import socket
 import subprocess
 import sys
@@ -65,6 +66,9 @@ class Handle:
         info = self._repr_info()
         return '<{}>'.format(' '.join(info))
 
+    def get_context(self):
+        return self._context
+
     def cancel(self):
         if not self._cancelled:
             self._cancelled = True
@@ -675,6 +679,23 @@ class BaseDefaultEventLoopPolicy(AbstractEventLoopPolicy):
         if (self._local._loop is None and
                 not self._local._set_called and
                 threading.current_thread() is threading.main_thread()):
+            stacklevel = 2
+            try:
+                f = sys._getframe(1)
+            except AttributeError:
+                pass
+            else:
+                # Move up the call stack so that the warning is attached
+                # to the line outside asyncio itself.
+                while f:
+                    module = f.f_globals.get('__name__')
+                    if not (module == 'asyncio' or module.startswith('asyncio.')):
+                        break
+                    f = f.f_back
+                    stacklevel += 1
+            import warnings
+            warnings.warn('There is no current event loop',
+                          DeprecationWarning, stacklevel=stacklevel)
             self.set_event_loop(self.new_event_loop())
 
         if self._local._loop is None:
@@ -786,14 +807,6 @@ def get_event_loop():
     the result of `get_event_loop_policy().get_event_loop()` call.
     """
     # NOTE: this function is implemented in C (see _asynciomodule.c)
-    return _py__get_event_loop()
-
-
-def _get_event_loop(stacklevel=3):
-    # This internal method is going away in Python 3.12, left here only for
-    # backwards compatibility with 3.10.0 - 3.10.8 and 3.11.0.
-    # Similarly, this method's C equivalent in _asyncio is going away as well.
-    # See GH-99949 for more details.
     current_loop = _get_running_loop()
     if current_loop is not None:
         return current_loop
@@ -826,7 +839,6 @@ _py__get_running_loop = _get_running_loop
 _py__set_running_loop = _set_running_loop
 _py_get_running_loop = get_running_loop
 _py_get_event_loop = get_event_loop
-_py__get_event_loop = _get_event_loop
 
 
 try:
@@ -834,7 +846,7 @@ try:
     # functions in asyncio.  Pure Python implementation is
     # about 4 times slower than C-accelerated.
     from _asyncio import (_get_running_loop, _set_running_loop,
-                          get_running_loop, get_event_loop, _get_event_loop)
+                          get_running_loop, get_event_loop)
 except ImportError:
     pass
 else:
@@ -843,4 +855,14 @@ else:
     _c__set_running_loop = _set_running_loop
     _c_get_running_loop = get_running_loop
     _c_get_event_loop = get_event_loop
-    _c__get_event_loop = _get_event_loop
+
+
+if hasattr(os, 'fork'):
+    def on_fork():
+        # Reset the loop and wakeupfd in the forked child process.
+        if _event_loop_policy is not None:
+            _event_loop_policy._local = BaseDefaultEventLoopPolicy._Local()
+        _set_running_loop(None)
+        signal.set_wakeup_fd(-1)
+
+    os.register_at_fork(after_in_child=on_fork)
diff --git a/contrib/tools/python3/src/Lib/asyncio/futures.py b/contrib/tools/python3/src/Lib/asyncio/futures.py
index 3a6b44a091..97fc4e3fcb 100644
--- a/contrib/tools/python3/src/Lib/asyncio/futures.py
+++ b/contrib/tools/python3/src/Lib/asyncio/futures.py
@@ -77,7 +77,7 @@ class Future:
         the default event loop.
         """
         if loop is None:
-            self._loop = events._get_event_loop()
+            self._loop = events.get_event_loop()
         else:
             self._loop = loop
         self._callbacks = []
@@ -413,7 +413,7 @@ def wrap_future(future, *, loop=None):
     assert isinstance(future, concurrent.futures.Future), \
         f'concurrent.futures.Future is expected, got {future!r}'
     if loop is None:
-        loop = events._get_event_loop()
+        loop = events.get_event_loop()
     new_future = loop.create_future()
     _chain_future(future, new_future)
     return new_future
diff --git a/contrib/tools/python3/src/Lib/asyncio/locks.py b/contrib/tools/python3/src/Lib/asyncio/locks.py
index fd41dfd3f4..ce5d8d5bfb 100644
--- a/contrib/tools/python3/src/Lib/asyncio/locks.py
+++ b/contrib/tools/python3/src/Lib/asyncio/locks.py
@@ -8,7 +8,6 @@ import enum
 
 from . import exceptions
 from . import mixins
-from . import tasks
 
 class _ContextManagerMixin:
     async def __aenter__(self):
diff --git a/contrib/tools/python3/src/Lib/asyncio/proactor_events.py b/contrib/tools/python3/src/Lib/asyncio/proactor_events.py
index c6aab408fc..1e2a730cf3 100644
--- a/contrib/tools/python3/src/Lib/asyncio/proactor_events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/proactor_events.py
@@ -288,7 +288,8 @@ class _ProactorReadPipeTransport(_ProactorBasePipeTransport,
                         # we got end-of-file so no need to reschedule a new read
                         return
 
-                    data = self._data[:length]
+                    # It's a new slice so make it immutable so protocols upstream don't have problems
+                    data = bytes(memoryview(self._data)[:length])
                 else:
                     # the future will be replaced by next proactor.recv call
                     fut.cancel()
diff --git a/contrib/tools/python3/src/Lib/asyncio/runners.py b/contrib/tools/python3/src/Lib/asyncio/runners.py
index b3e0c44b7f..1b89236599 100644
--- a/contrib/tools/python3/src/Lib/asyncio/runners.py
+++ b/contrib/tools/python3/src/Lib/asyncio/runners.py
@@ -5,12 +5,11 @@ import enum
 import functools
 import threading
 import signal
-import sys
 from . import coroutines
 from . import events
 from . import exceptions
 from . import tasks
-
+from . import constants
 
 class _State(enum.Enum):
     CREATED = "created"
@@ -70,7 +69,8 @@ class Runner:
             loop = self._loop
             _cancel_all_tasks(loop)
             loop.run_until_complete(loop.shutdown_asyncgens())
-            loop.run_until_complete(loop.shutdown_default_executor())
+            loop.run_until_complete(
+                loop.shutdown_default_executor(constants.THREAD_JOIN_TIMEOUT))
         finally:
             if self._set_event_loop:
                 events.set_event_loop(None)
@@ -157,12 +157,12 @@ class Runner:
         raise KeyboardInterrupt()
 
 
-def run(main, *, debug=None):
+def run(main, *, debug=None, loop_factory=None):
     """Execute the coroutine and return the result.
 
     This function runs the passed coroutine, taking care of
-    managing the asyncio event loop and finalizing asynchronous
-    generators.
+    managing the asyncio event loop, finalizing asynchronous
+    generators and closing the default executor.
 
     This function cannot be called when another asyncio event loop is
     running in the same thread.
@@ -173,6 +173,10 @@ def run(main, *, debug=None):
     It should be used as a main entry point for asyncio programs, and should
     ideally only be called once.
 
+    The executor is given a timeout duration of 5 minutes to shutdown.
+    If the executor hasn't finished within that duration, a warning is
+    emitted and the executor is closed.
+
     Example:
 
         async def main():
@@ -186,7 +190,7 @@ def run(main, *, debug=None):
         raise RuntimeError(
             "asyncio.run() cannot be called from a running event loop")
 
-    with Runner(debug=debug) as runner:
+    with Runner(debug=debug, loop_factory=loop_factory) as runner:
         return runner.run(main)
 
 
diff --git a/contrib/tools/python3/src/Lib/asyncio/selector_events.py b/contrib/tools/python3/src/Lib/asyncio/selector_events.py
index 40df1b7da5..790711f834 100644
--- a/contrib/tools/python3/src/Lib/asyncio/selector_events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/selector_events.py
@@ -9,6 +9,8 @@ __all__ = 'BaseSelectorEventLoop',
 import collections
 import errno
 import functools
+import itertools
+import os
 import selectors
 import socket
 import warnings
@@ -28,6 +30,14 @@ from . import transports
 from . import trsock
 from .log import logger
 
+_HAS_SENDMSG = hasattr(socket.socket, 'sendmsg')
+
+if _HAS_SENDMSG:
+    try:
+        SC_IOV_MAX = os.sysconf('SC_IOV_MAX')
+    except OSError:
+        # Fallback to send
+        _HAS_SENDMSG = False
 
 def _test_selector_event(selector, fd, event):
     # Test if the selector is monitoring 'event' events
@@ -58,6 +68,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
 
     def _make_socket_transport(self, sock, protocol, waiter=None, *,
                                extra=None, server=None):
+        self._ensure_fd_no_transport(sock)
         return _SelectorSocketTransport(self, sock, protocol, waiter,
                                         extra, server)
 
@@ -68,6 +79,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
             ssl_handshake_timeout=constants.SSL_HANDSHAKE_TIMEOUT,
             ssl_shutdown_timeout=constants.SSL_SHUTDOWN_TIMEOUT,
     ):
+        self._ensure_fd_no_transport(rawsock)
         ssl_protocol = sslproto.SSLProtocol(
             self, protocol, sslcontext, waiter,
             server_side, server_hostname,
@@ -80,6 +92,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
 
     def _make_datagram_transport(self, sock, protocol,
                                  address=None, waiter=None, extra=None):
+        self._ensure_fd_no_transport(sock)
         return _SelectorDatagramTransport(self, sock, protocol,
                                           address, waiter, extra)
 
@@ -758,8 +771,6 @@ class _SelectorTransport(transports._FlowControlMixin,
 
     max_size = 256 * 1024  # Buffer size passed to recv().
 
-    _buffer_factory = bytearray  # Constructs initial value for self._buffer.
-
     # Attribute used in the destructor: it must be set even if the constructor
     # is not called (see _SelectorSslTransport which may start by raising an
     # exception)
@@ -784,7 +795,7 @@ class _SelectorTransport(transports._FlowControlMixin,
         self.set_protocol(protocol)
 
         self._server = server
-        self._buffer = self._buffer_factory()
+        self._buffer = collections.deque()
         self._conn_lost = 0  # Set when call to connection_lost scheduled.
         self._closing = False  # Set when close() called.
         self._paused = False  # Set when pause_reading() called
@@ -909,7 +920,7 @@ class _SelectorTransport(transports._FlowControlMixin,
                 self._server = None
 
     def get_write_buffer_size(self):
-        return len(self._buffer)
+        return sum(map(len, self._buffer))
 
     def _add_reader(self, fd, callback, *args):
         if not self.is_reading():
@@ -929,7 +940,10 @@ class _SelectorSocketTransport(_SelectorTransport):
         super().__init__(loop, sock, protocol, extra, server)
         self._eof = False
         self._empty_waiter = None
-
+        if _HAS_SENDMSG:
+            self._write_ready = self._write_sendmsg
+        else:
+            self._write_ready = self._write_send
         # Disable the Nagle algorithm -- small writes will be
         # sent without waiting for the TCP ACK.  This generally
         # decreases the latency (in some cases significantly.)
@@ -1067,23 +1081,68 @@ class _SelectorSocketTransport(_SelectorTransport):
                 self._fatal_error(exc, 'Fatal write error on socket transport')
                 return
             else:
-                data = data[n:]
+                data = memoryview(data)[n:]
                 if not data:
                     return
             # Not all was written; register write handler.
             self._loop._add_writer(self._sock_fd, self._write_ready)
 
         # Add it to the buffer.
-        self._buffer.extend(data)
+        self._buffer.append(data)
         self._maybe_pause_protocol()
 
-    def _write_ready(self):
+    def _get_sendmsg_buffer(self):
+        return itertools.islice(self._buffer, SC_IOV_MAX)
+
+    def _write_sendmsg(self):
         assert self._buffer, 'Data should not be empty'
+        if self._conn_lost:
+            return
+        try:
+            nbytes = self._sock.sendmsg(self._get_sendmsg_buffer())
+            self._adjust_leftover_buffer(nbytes)
+        except (BlockingIOError, InterruptedError):
+            pass
+        except (SystemExit, KeyboardInterrupt):
+            raise
+        except BaseException as exc:
+            self._loop._remove_writer(self._sock_fd)
+            self._buffer.clear()
+            self._fatal_error(exc, 'Fatal write error on socket transport')
+            if self._empty_waiter is not None:
+                self._empty_waiter.set_exception(exc)
+        else:
+            self._maybe_resume_protocol()  # May append to buffer.
+            if not self._buffer:
+                self._loop._remove_writer(self._sock_fd)
+                if self._empty_waiter is not None:
+                    self._empty_waiter.set_result(None)
+                if self._closing:
+                    self._call_connection_lost(None)
+                elif self._eof:
+                    self._sock.shutdown(socket.SHUT_WR)
 
+    def _adjust_leftover_buffer(self, nbytes: int) -> None:
+        buffer = self._buffer
+        while nbytes:
+            b = buffer.popleft()
+            b_len = len(b)
+            if b_len <= nbytes:
+                nbytes -= b_len
+            else:
+                buffer.appendleft(b[nbytes:])
+                break
+
+    def _write_send(self):
+        assert self._buffer, 'Data should not be empty'
         if self._conn_lost:
             return
         try:
-            n = self._sock.send(self._buffer)
+            buffer = self._buffer.popleft()
+            n = self._sock.send(buffer)
+            if n != len(buffer):
+                # Not all data was written
+                self._buffer.appendleft(buffer[n:])
         except (BlockingIOError, InterruptedError):
             pass
         except (SystemExit, KeyboardInterrupt):
@@ -1095,8 +1154,6 @@ class _SelectorSocketTransport(_SelectorTransport):
             if self._empty_waiter is not None:
                 self._empty_waiter.set_exception(exc)
         else:
-            if n:
-                del self._buffer[:n]
             self._maybe_resume_protocol()  # May append to buffer.
             if not self._buffer:
                 self._loop._remove_writer(self._sock_fd)
@@ -1114,6 +1171,19 @@ class _SelectorSocketTransport(_SelectorTransport):
         if not self._buffer:
             self._sock.shutdown(socket.SHUT_WR)
 
+    def writelines(self, list_of_data):
+        if self._eof:
+            raise RuntimeError('Cannot call writelines() after write_eof()')
+        if self._empty_waiter is not None:
+            raise RuntimeError('unable to writelines; sendfile is in progress')
+        if not list_of_data:
+            return
+        self._buffer.extend([memoryview(data) for data in list_of_data])
+        self._write_ready()
+        # If the entire buffer couldn't be written, register a write handler
+        if self._buffer:
+            self._loop._add_writer(self._sock_fd, self._write_ready)
+
     def can_write_eof(self):
         return True
 
@@ -1134,8 +1204,13 @@ class _SelectorSocketTransport(_SelectorTransport):
     def _reset_empty_waiter(self):
         self._empty_waiter = None
 
+    def close(self):
+        self._read_ready_cb = None
+        self._write_ready = None
+        super().close()
+
 
-class _SelectorDatagramTransport(_SelectorTransport):
+class _SelectorDatagramTransport(_SelectorTransport, transports.DatagramTransport):
 
     _buffer_factory = collections.deque
 
diff --git a/contrib/tools/python3/src/Lib/asyncio/streams.py b/contrib/tools/python3/src/Lib/asyncio/streams.py
index 26ffc86584..f310aa2f36 100644
--- a/contrib/tools/python3/src/Lib/asyncio/streams.py
+++ b/contrib/tools/python3/src/Lib/asyncio/streams.py
@@ -125,7 +125,7 @@ class FlowControlMixin(protocols.Protocol):
 
     def __init__(self, loop=None):
         if loop is None:
-            self._loop = events._get_event_loop(stacklevel=4)
+            self._loop = events.get_event_loop()
         else:
             self._loop = loop
         self._paused = False
@@ -393,7 +393,8 @@ class StreamWriter:
 
     async def start_tls(self, sslcontext, *,
                         server_hostname=None,
-                        ssl_handshake_timeout=None):
+                        ssl_handshake_timeout=None,
+                        ssl_shutdown_timeout=None):
         """Upgrade an existing stream-based connection to TLS."""
         server_side = self._protocol._client_connected_cb is not None
         protocol = self._protocol
@@ -401,7 +402,8 @@ class StreamWriter:
         new_transport = await self._loop.start_tls(  # type: ignore
             self._transport, protocol, sslcontext,
             server_side=server_side, server_hostname=server_hostname,
-            ssl_handshake_timeout=ssl_handshake_timeout)
+            ssl_handshake_timeout=ssl_handshake_timeout,
+            ssl_shutdown_timeout=ssl_shutdown_timeout)
         self._transport = new_transport
         protocol._replace_writer(self)
 
@@ -426,7 +428,7 @@ class StreamReader:
 
         self._limit = limit
         if loop is None:
-            self._loop = events._get_event_loop()
+            self._loop = events.get_event_loop()
         else:
             self._loop = loop
         self._buffer = bytearray()
@@ -711,7 +713,7 @@ class StreamReader:
             await self._wait_for_data('read')
 
         # This will work right even if buffer is less than n bytes
-        data = bytes(self._buffer[:n])
+        data = bytes(memoryview(self._buffer)[:n])
         del self._buffer[:n]
 
         self._maybe_resume_transport()
@@ -753,7 +755,7 @@ class StreamReader:
             data = bytes(self._buffer)
             self._buffer.clear()
         else:
-            data = bytes(self._buffer[:n])
+            data = bytes(memoryview(self._buffer)[:n])
             del self._buffer[:n]
         self._maybe_resume_transport()
         return data
diff --git a/contrib/tools/python3/src/Lib/asyncio/subprocess.py b/contrib/tools/python3/src/Lib/asyncio/subprocess.py
index da4f00a4a0..043359bbd0 100644
--- a/contrib/tools/python3/src/Lib/asyncio/subprocess.py
+++ b/contrib/tools/python3/src/Lib/asyncio/subprocess.py
@@ -148,10 +148,11 @@ class Process:
     async def _feed_stdin(self, input):
         debug = self._loop.get_debug()
         try:
-            self.stdin.write(input)
-            if debug:
-                logger.debug(
-                    '%r communicate: feed stdin (%s bytes)', self, len(input))
+            if input is not None:
+                self.stdin.write(input)
+                if debug:
+                    logger.debug(
+                        '%r communicate: feed stdin (%s bytes)', self, len(input))
 
             await self.stdin.drain()
         except (BrokenPipeError, ConnectionResetError) as exc:
@@ -185,7 +186,7 @@ class Process:
         return output
 
     async def communicate(self, input=None):
-        if input is not None:
+        if self.stdin is not None:
             stdin = self._feed_stdin(input)
         else:
             stdin = self._noop()
diff --git a/contrib/tools/python3/src/Lib/asyncio/taskgroups.py b/contrib/tools/python3/src/Lib/asyncio/taskgroups.py
index bfdbe63049..d264e51f1f 100644
--- a/contrib/tools/python3/src/Lib/asyncio/taskgroups.py
+++ b/contrib/tools/python3/src/Lib/asyncio/taskgroups.py
@@ -2,7 +2,7 @@
 # license: PSFL.
 
 
-__all__ = ["TaskGroup"]
+__all__ = ("TaskGroup",)
 
 from . import events
 from . import exceptions
@@ -162,8 +162,14 @@ class TaskGroup:
         else:
             task = self._loop.create_task(coro, context=context)
         tasks._set_task_name(task, name)
-        task.add_done_callback(self._on_task_done)
-        self._tasks.add(task)
+        # optimization: Immediately call the done callback if the task is
+        # already done (e.g. if the coro was able to complete eagerly),
+        # and skip scheduling a done callback
+        if task.done():
+            self._on_task_done(task)
+        else:
+            self._tasks.add(task)
+            task.add_done_callback(self._on_task_done)
         return task
 
     # Since Python 3.8 Tasks propagate all exceptions correctly,
diff --git a/contrib/tools/python3/src/Lib/asyncio/tasks.py b/contrib/tools/python3/src/Lib/asyncio/tasks.py
index 6ca545e30a..65f2a6ef80 100644
--- a/contrib/tools/python3/src/Lib/asyncio/tasks.py
+++ b/contrib/tools/python3/src/Lib/asyncio/tasks.py
@@ -6,6 +6,7 @@ __all__ = (
     'wait', 'wait_for', 'as_completed', 'sleep',
     'gather', 'shield', 'ensure_future', 'run_coroutine_threadsafe',
     'current_task', 'all_tasks',
+    'create_eager_task_factory', 'eager_task_factory',
     '_register_task', '_unregister_task', '_enter_task', '_leave_task',
 )
 
@@ -24,7 +25,7 @@ from . import coroutines
 from . import events
 from . import exceptions
 from . import futures
-from .coroutines import _is_coroutine
+from . import timeouts
 
 # Helper to generate new task names
 # This uses itertools.count() instead of a "+= 1" operation because the latter
@@ -43,22 +44,26 @@ def all_tasks(loop=None):
     """Return a set of all tasks for the loop."""
     if loop is None:
         loop = events.get_running_loop()
-    # Looping over a WeakSet (_all_tasks) isn't safe as it can be updated from another
-    # thread while we do so. Therefore we cast it to list prior to filtering. The list
-    # cast itself requires iteration, so we repeat it several times ignoring
-    # RuntimeErrors (which are not very likely to occur). See issues 34970 and 36607 for
-    # details.
+    # capturing the set of eager tasks first, so if an eager task "graduates"
+    # to a regular task in another thread, we don't risk missing it.
+    eager_tasks = list(_eager_tasks)
+    # Looping over the WeakSet isn't safe as it can be updated from another
+    # thread, therefore we cast it to list prior to filtering. The list cast
+    # itself requires iteration, so we repeat it several times ignoring
+    # RuntimeErrors (which are not very likely to occur).
+    # See issues 34970 and 36607 for details.
+    scheduled_tasks = None
     i = 0
     while True:
         try:
-            tasks = list(_all_tasks)
+            scheduled_tasks = list(_scheduled_tasks)
         except RuntimeError:
             i += 1
             if i >= 1000:
                 raise
         else:
             break
-    return {t for t in tasks
+    return {t for t in itertools.chain(scheduled_tasks, eager_tasks)
             if futures._get_loop(t) is loop and not t.done()}
 
 
@@ -103,7 +108,8 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
     # status is still pending
     _log_destroy_pending = True
 
-    def __init__(self, coro, *, loop=None, name=None, context=None):
+    def __init__(self, coro, *, loop=None, name=None, context=None,
+                 eager_start=False):
         super().__init__(loop=loop)
         if self._source_traceback:
             del self._source_traceback[-1]
@@ -127,8 +133,11 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
         else:
             self._context = context
 
-        self._loop.call_soon(self.__step, context=self._context)
-        _register_task(self)
+        if eager_start and self._loop.is_running():
+            self.__eager_start()
+        else:
+            self._loop.call_soon(self.__step, context=self._context)
+            _register_task(self)
 
     def __del__(self):
         if self._state == futures._PENDING and self._log_destroy_pending:
@@ -149,6 +158,9 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
     def get_coro(self):
         return self._coro
 
+    def get_context(self):
+        return self._context
+
     def get_name(self):
         return self._name
 
@@ -257,6 +269,25 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
             self._num_cancels_requested -= 1
         return self._num_cancels_requested
 
+    def __eager_start(self):
+        prev_task = _swap_current_task(self._loop, self)
+        try:
+            _register_eager_task(self)
+            try:
+                self._context.run(self.__step_run_and_handle_result, None)
+            finally:
+                _unregister_eager_task(self)
+        finally:
+            try:
+                curtask = _swap_current_task(self._loop, prev_task)
+                assert curtask is self
+            finally:
+                if self.done():
+                    self._coro = None
+                    self = None  # Needed to break cycles when an exception occurs.
+                else:
+                    _register_task(self)
+
     def __step(self, exc=None):
         if self.done():
             raise exceptions.InvalidStateError(
@@ -265,11 +296,17 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
             if not isinstance(exc, exceptions.CancelledError):
                 exc = self._make_cancelled_error()
             self._must_cancel = False
-        coro = self._coro
         self._fut_waiter = None
 
         _enter_task(self._loop, self)
-        # Call either coro.throw(exc) or coro.send(None).
+        try:
+            self.__step_run_and_handle_result(exc)
+        finally:
+            _leave_task(self._loop, self)
+            self = None  # Needed to break cycles when an exception occurs.
+
+    def __step_run_and_handle_result(self, exc):
+        coro = self._coro
         try:
             if exc is None:
                 # We use the `send` method directly, because coroutines
@@ -341,7 +378,6 @@ class Task(futures._PyFuture):  # Inherit Python Task implementation
                 self._loop.call_soon(
                     self.__step, new_exc, context=self._context)
         finally:
-            _leave_task(self._loop, self)
             self = None  # Needed to break cycles when an exception occurs.
 
     def __wakeup(self, future):
@@ -444,65 +480,44 @@ async def wait_for(fut, timeout):
 
     If the wait is cancelled, the task is also cancelled.
 
+    If the task supresses the cancellation and returns a value instead,
+    that value is returned.
+
     This function is a coroutine.
     """
-    loop = events.get_running_loop()
+    # The special case for timeout <= 0 is for the following case:
+    #
+    # async def test_waitfor():
+    #     func_started = False
+    #
+    #     async def func():
+    #         nonlocal func_started
+    #         func_started = True
+    #
+    #     try:
+    #         await asyncio.wait_for(func(), 0)
+    #     except asyncio.TimeoutError:
+    #         assert not func_started
+    #     else:
+    #         assert False
+    #
+    # asyncio.run(test_waitfor())
 
-    if timeout is None:
-        return await fut
 
-    if timeout <= 0:
-        fut = ensure_future(fut, loop=loop)
+    if timeout is not None and timeout <= 0:
+        fut = ensure_future(fut)
 
         if fut.done():
             return fut.result()
 
-        await _cancel_and_wait(fut, loop=loop)
+        await _cancel_and_wait(fut)
         try:
             return fut.result()
         except exceptions.CancelledError as exc:
-            raise exceptions.TimeoutError() from exc
-
-    waiter = loop.create_future()
-    timeout_handle = loop.call_later(timeout, _release_waiter, waiter)
-    cb = functools.partial(_release_waiter, waiter)
-
-    fut = ensure_future(fut, loop=loop)
-    fut.add_done_callback(cb)
-
-    try:
-        # wait until the future completes or the timeout
-        try:
-            await waiter
-        except exceptions.CancelledError:
-            if fut.done():
-                return fut.result()
-            else:
-                fut.remove_done_callback(cb)
-                # We must ensure that the task is not running
-                # after wait_for() returns.
-                # See https://bugs.python.org/issue32751
-                await _cancel_and_wait(fut, loop=loop)
-                raise
-
-        if fut.done():
-            return fut.result()
-        else:
-            fut.remove_done_callback(cb)
-            # We must ensure that the task is not running
-            # after wait_for() returns.
-            # See https://bugs.python.org/issue32751
-            await _cancel_and_wait(fut, loop=loop)
-            # In case task cancellation failed with some
-            # exception, we should re-raise it
-            # See https://bugs.python.org/issue40607
-            try:
-                return fut.result()
-            except exceptions.CancelledError as exc:
-                raise exceptions.TimeoutError() from exc
-    finally:
-        timeout_handle.cancel()
+            raise TimeoutError from exc
 
+    async with timeouts.timeout(timeout):
+        return await fut
 
 async def _wait(fs, timeout, return_when, loop):
     """Internal helper for wait().
@@ -548,9 +563,10 @@ async def _wait(fs, timeout, return_when, loop):
     return done, pending
 
 
-async def _cancel_and_wait(fut, loop):
+async def _cancel_and_wait(fut):
     """Cancel the *fut* future or task and wait until it completes."""
 
+    loop = events.get_running_loop()
     waiter = loop.create_future()
     cb = functools.partial(_release_waiter, waiter)
     fut.add_done_callback(cb)
@@ -589,7 +605,7 @@ def as_completed(fs, *, timeout=None):
     from .queues import Queue  # Import here to avoid circular import problem.
     done = Queue()
 
-    loop = events._get_event_loop()
+    loop = events.get_event_loop()
     todo = {ensure_future(f, loop=loop) for f in set(fs)}
     timeout_handle = None
 
@@ -656,46 +672,33 @@ def ensure_future(coro_or_future, *, loop=None):
 
     If the argument is a Future, it is returned directly.
     """
-    return _ensure_future(coro_or_future, loop=loop)
-
-
-def _ensure_future(coro_or_future, *, loop=None):
     if futures.isfuture(coro_or_future):
         if loop is not None and loop is not futures._get_loop(coro_or_future):
             raise ValueError('The future belongs to a different loop than '
                             'the one specified as the loop argument')
         return coro_or_future
-    called_wrap_awaitable = False
+    should_close = True
     if not coroutines.iscoroutine(coro_or_future):
         if inspect.isawaitable(coro_or_future):
+            async def _wrap_awaitable(awaitable):
+                return await awaitable
+
             coro_or_future = _wrap_awaitable(coro_or_future)
-            called_wrap_awaitable = True
+            should_close = False
         else:
             raise TypeError('An asyncio.Future, a coroutine or an awaitable '
                             'is required')
 
     if loop is None:
-        loop = events._get_event_loop(stacklevel=4)
+        loop = events.get_event_loop()
     try:
         return loop.create_task(coro_or_future)
     except RuntimeError:
-        if not called_wrap_awaitable:
+        if should_close:
             coro_or_future.close()
         raise
 
 
-@types.coroutine
-def _wrap_awaitable(awaitable):
-    """Helper for asyncio.ensure_future().
-
-    Wraps awaitable (an object with __await__) into a coroutine
-    that will later be wrapped in a Task by ensure_future().
-    """
-    return (yield from awaitable.__await__())
-
-_wrap_awaitable._is_coroutine = _is_coroutine
-
-
 class _GatheringFuture(futures.Future):
     """Helper for gather().
 
@@ -756,7 +759,7 @@ def gather(*coros_or_futures, return_exceptions=False):
     gather won't cancel any other awaitables.
     """
     if not coros_or_futures:
-        loop = events._get_event_loop()
+        loop = events.get_event_loop()
         outer = loop.create_future()
         outer.set_result([])
         return outer
@@ -820,11 +823,12 @@ def gather(*coros_or_futures, return_exceptions=False):
     children = []
     nfuts = 0
     nfinished = 0
+    done_futs = []
     loop = None
     outer = None  # bpo-46672
     for arg in coros_or_futures:
         if arg not in arg_to_fut:
-            fut = _ensure_future(arg, loop=loop)
+            fut = ensure_future(arg, loop=loop)
             if loop is None:
                 loop = futures._get_loop(fut)
             if fut is not arg:
@@ -836,7 +840,10 @@ def gather(*coros_or_futures, return_exceptions=False):
 
             nfuts += 1
             arg_to_fut[arg] = fut
-            fut.add_done_callback(_done_callback)
+            if fut.done():
+                done_futs.append(fut)
+            else:
+                fut.add_done_callback(_done_callback)
 
         else:
             # There's a duplicate Future object in coros_or_futures.
@@ -845,6 +852,13 @@ def gather(*coros_or_futures, return_exceptions=False):
         children.append(fut)
 
     outer = _GatheringFuture(children, loop=loop)
+    # Run done callbacks after GatheringFuture created so any post-processing
+    # can be performed at this point
+    # optimization: in the special case that *all* futures finished eagerly,
+    # this will effectively complete the gather eagerly, with the last
+    # callback setting the result (or exception) on outer before returning it
+    for fut in done_futs:
+        _done_callback(fut)
     return outer
 
 
@@ -881,7 +895,7 @@ def shield(arg):
     weak references to tasks. A task that isn't referenced elsewhere
     may get garbage collected at any time, even before it's done.
     """
-    inner = _ensure_future(arg)
+    inner = ensure_future(arg)
     if inner.done():
         # Shortcut.
         return inner
@@ -937,8 +951,40 @@ def run_coroutine_threadsafe(coro, loop):
     return future
 
 
-# WeakSet containing all alive tasks.
-_all_tasks = weakref.WeakSet()
+def create_eager_task_factory(custom_task_constructor):
+    """Create a function suitable for use as a task factory on an event-loop.
+
+        Example usage:
+
+            loop.set_task_factory(
+                asyncio.create_eager_task_factory(my_task_constructor))
+
+        Now, tasks created will be started immediately (rather than being first
+        scheduled to an event loop). The constructor argument can be any callable
+        that returns a Task-compatible object and has a signature compatible
+        with `Task.__init__`; it must have the `eager_start` keyword argument.
+
+        Most applications will use `Task` for `custom_task_constructor` and in
+        this case there's no need to call `create_eager_task_factory()`
+        directly. Instead the  global `eager_task_factory` instance can be
+        used. E.g. `loop.set_task_factory(asyncio.eager_task_factory)`.
+        """
+
+    def factory(loop, coro, *, name=None, context=None):
+        return custom_task_constructor(
+            coro, loop=loop, name=name, context=context, eager_start=True)
+
+    return factory
+
+
+eager_task_factory = create_eager_task_factory(Task)
+
+
+# Collectively these two sets hold references to the complete set of active
+# tasks. Eagerly executed tasks use a faster regular set as an optimization
+# but may graduate to a WeakSet if the task blocks on IO.
+_scheduled_tasks = weakref.WeakSet()
+_eager_tasks = set()
 
 # Dictionary containing tasks that are currently active in
 # all running event loops.  {EventLoop: Task}
@@ -946,8 +992,13 @@ _current_tasks = {}
 
 
 def _register_task(task):
-    """Register a new task in asyncio as executed by loop."""
-    _all_tasks.add(task)
+    """Register an asyncio Task scheduled to run on an event loop."""
+    _scheduled_tasks.add(task)
+
+
+def _register_eager_task(task):
+    """Register an asyncio Task about to be eagerly executed."""
+    _eager_tasks.add(task)
 
 
 def _enter_task(loop, task):
@@ -966,25 +1017,49 @@ def _leave_task(loop, task):
     del _current_tasks[loop]
 
 
+def _swap_current_task(loop, task):
+    prev_task = _current_tasks.get(loop)
+    if task is None:
+        del _current_tasks[loop]
+    else:
+        _current_tasks[loop] = task
+    return prev_task
+
+
 def _unregister_task(task):
-    """Unregister a task."""
-    _all_tasks.discard(task)
+    """Unregister a completed, scheduled Task."""
+    _scheduled_tasks.discard(task)
+
+
+def _unregister_eager_task(task):
+    """Unregister a task which finished its first eager step."""
+    _eager_tasks.discard(task)
 
 
+_py_current_task = current_task
 _py_register_task = _register_task
+_py_register_eager_task = _register_eager_task
 _py_unregister_task = _unregister_task
+_py_unregister_eager_task = _unregister_eager_task
 _py_enter_task = _enter_task
 _py_leave_task = _leave_task
+_py_swap_current_task = _swap_current_task
 
 
 try:
-    from _asyncio import (_register_task, _unregister_task,
-                          _enter_task, _leave_task,
-                          _all_tasks, _current_tasks)
+    from _asyncio import (_register_task, _register_eager_task,
+                          _unregister_task, _unregister_eager_task,
+                          _enter_task, _leave_task, _swap_current_task,
+                          _scheduled_tasks, _eager_tasks, _current_tasks,
+                          current_task)
 except ImportError:
     pass
 else:
+    _c_current_task = current_task
     _c_register_task = _register_task
+    _c_register_eager_task = _register_eager_task
     _c_unregister_task = _unregister_task
+    _c_unregister_eager_task = _unregister_eager_task
     _c_enter_task = _enter_task
     _c_leave_task = _leave_task
+    _c_swap_current_task = _swap_current_task
diff --git a/contrib/tools/python3/src/Lib/asyncio/unix_events.py b/contrib/tools/python3/src/Lib/asyncio/unix_events.py
index 77d2670f83..f2e920ada4 100644
--- a/contrib/tools/python3/src/Lib/asyncio/unix_events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/unix_events.py
@@ -195,22 +195,25 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
     async def _make_subprocess_transport(self, protocol, args, shell,
                                          stdin, stdout, stderr, bufsize,
                                          extra=None, **kwargs):
-        with events.get_child_watcher() as watcher:
+        with warnings.catch_warnings():
+            warnings.simplefilter('ignore', DeprecationWarning)
+            watcher = events.get_child_watcher()
+
+        with watcher:
             if not watcher.is_active():
                 # Check early.
                 # Raising exception before process creation
                 # prevents subprocess execution if the watcher
                 # is not ready to handle it.
                 raise RuntimeError("asyncio.get_child_watcher() is not activated, "
-                                   "subprocess support is not installed.")
+                                "subprocess support is not installed.")
             waiter = self.create_future()
             transp = _UnixSubprocessTransport(self, protocol, args, shell,
-                                              stdin, stdout, stderr, bufsize,
-                                              waiter=waiter, extra=extra,
-                                              **kwargs)
-
+                                            stdin, stdout, stderr, bufsize,
+                                            waiter=waiter, extra=extra,
+                                            **kwargs)
             watcher.add_child_handler(transp.get_pid(),
-                                      self._child_watcher_callback, transp)
+                                    self._child_watcher_callback, transp)
             try:
                 await waiter
             except (SystemExit, KeyboardInterrupt):
@@ -223,8 +226,7 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
         return transp
 
     def _child_watcher_callback(self, pid, returncode, transp):
-        # Skip one iteration for callbacks to be executed
-        self.call_soon_threadsafe(self.call_soon, transp._process_exited, returncode)
+        self.call_soon_threadsafe(transp._process_exited, returncode)
 
     async def create_unix_connection(
             self, protocol_factory, path=None, *,
@@ -851,6 +853,13 @@ class AbstractChildWatcher:
         waitpid(-1), there should be only one active object per process.
     """
 
+    def __init_subclass__(cls) -> None:
+        if cls.__module__ != __name__:
+            warnings._deprecated("AbstractChildWatcher",
+                             "{name!r} is deprecated as of Python 3.12 and will be "
+                             "removed in Python {remove}.",
+                              remove=(3, 14))
+
     def add_child_handler(self, pid, callback, *args):
         """Register a new child handler.
 
@@ -919,10 +928,6 @@ class PidfdChildWatcher(AbstractChildWatcher):
     recent (5.3+) kernels.
     """
 
-    def __init__(self):
-        self._loop = None
-        self._callbacks = {}
-
     def __enter__(self):
         return self
 
@@ -930,35 +935,22 @@ class PidfdChildWatcher(AbstractChildWatcher):
         pass
 
     def is_active(self):
-        return self._loop is not None and self._loop.is_running()
+        return True
 
     def close(self):
-        self.attach_loop(None)
+        pass
 
     def attach_loop(self, loop):
-        if self._loop is not None and loop is None and self._callbacks:
-            warnings.warn(
-                'A loop is being detached '
-                'from a child watcher with pending handlers',
-                RuntimeWarning)
-        for pidfd, _, _ in self._callbacks.values():
-            self._loop._remove_reader(pidfd)
-            os.close(pidfd)
-        self._callbacks.clear()
-        self._loop = loop
+        pass
 
     def add_child_handler(self, pid, callback, *args):
-        existing = self._callbacks.get(pid)
-        if existing is not None:
-            self._callbacks[pid] = existing[0], callback, args
-        else:
-            pidfd = os.pidfd_open(pid)
-            self._loop._add_reader(pidfd, self._do_wait, pid)
-            self._callbacks[pid] = pidfd, callback, args
+        loop = events.get_running_loop()
+        pidfd = os.pidfd_open(pid)
+        loop._add_reader(pidfd, self._do_wait, pid, pidfd, callback, args)
 
-    def _do_wait(self, pid):
-        pidfd, callback, args = self._callbacks.pop(pid)
-        self._loop._remove_reader(pidfd)
+    def _do_wait(self, pid, pidfd, callback, args):
+        loop = events.get_running_loop()
+        loop._remove_reader(pidfd)
         try:
             _, status = os.waitpid(pid, 0)
         except ChildProcessError:
@@ -976,12 +968,9 @@ class PidfdChildWatcher(AbstractChildWatcher):
         callback(pid, returncode, *args)
 
     def remove_child_handler(self, pid):
-        try:
-            pidfd, _, _ = self._callbacks.pop(pid)
-        except KeyError:
-            return False
-        self._loop._remove_reader(pidfd)
-        os.close(pidfd)
+        # asyncio never calls remove_child_handler() !!!
+        # The method is no-op but is implemented because
+        # abstract base classes require it.
         return True
 
 
@@ -1049,6 +1038,13 @@ class SafeChildWatcher(BaseChildWatcher):
     big number of children (O(n) each time SIGCHLD is raised)
     """
 
+    def __init__(self):
+        super().__init__()
+        warnings._deprecated("SafeChildWatcher",
+                             "{name!r} is deprecated as of Python 3.12 and will be "
+                             "removed in Python {remove}.",
+                              remove=(3, 14))
+
     def close(self):
         self._callbacks.clear()
         super().close()
@@ -1127,6 +1123,10 @@ class FastChildWatcher(BaseChildWatcher):
         self._lock = threading.Lock()
         self._zombies = {}
         self._forks = 0
+        warnings._deprecated("FastChildWatcher",
+                             "{name!r} is deprecated as of Python 3.12 and will be "
+                             "removed in Python {remove}.",
+                              remove=(3, 14))
 
     def close(self):
         self._callbacks.clear()
@@ -1239,6 +1239,10 @@ class MultiLoopChildWatcher(AbstractChildWatcher):
     def __init__(self):
         self._callbacks = {}
         self._saved_sighandler = None
+        warnings._deprecated("MultiLoopChildWatcher",
+                             "{name!r} is deprecated as of Python 3.12 and will be "
+                             "removed in Python {remove}.",
+                              remove=(3, 14))
 
     def is_active(self):
         return self._saved_sighandler is not None
@@ -1423,6 +1427,17 @@ class ThreadedChildWatcher(AbstractChildWatcher):
 
         self._threads.pop(expected_pid)
 
+def can_use_pidfd():
+    if not hasattr(os, 'pidfd_open'):
+        return False
+    try:
+        pid = os.getpid()
+        os.close(os.pidfd_open(pid, 0))
+    except OSError:
+        # blocked by security policy like SECCOMP
+        return False
+    return True
+
 
 class _UnixDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy):
     """UNIX event loop policy with a watcher for child processes."""
@@ -1435,7 +1450,10 @@ class _UnixDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy):
     def _init_watcher(self):
         with events._lock:
             if self._watcher is None:  # pragma: no branch
-                self._watcher = ThreadedChildWatcher()
+                if can_use_pidfd():
+                    self._watcher = PidfdChildWatcher()
+                else:
+                    self._watcher = ThreadedChildWatcher()
 
     def set_event_loop(self, loop):
         """Set the event loop.
@@ -1459,6 +1477,9 @@ class _UnixDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy):
         if self._watcher is None:
             self._init_watcher()
 
+        warnings._deprecated("get_child_watcher",
+                            "{name!r} is deprecated as of Python 3.12 and will be "
+                            "removed in Python {remove}.", remove=(3, 14))
         return self._watcher
 
     def set_child_watcher(self, watcher):
@@ -1470,6 +1491,9 @@ class _UnixDefaultEventLoopPolicy(events.BaseDefaultEventLoopPolicy):
             self._watcher.close()
 
         self._watcher = watcher
+        warnings._deprecated("set_child_watcher",
+                            "{name!r} is deprecated as of Python 3.12 and will be "
+                            "removed in Python {remove}.", remove=(3, 14))
 
 
 SelectorEventLoop = _UnixSelectorEventLoop
diff --git a/contrib/tools/python3/src/Lib/asyncio/windows_events.py b/contrib/tools/python3/src/Lib/asyncio/windows_events.py
index eb33551b41..c9a5fb841c 100644
--- a/contrib/tools/python3/src/Lib/asyncio/windows_events.py
+++ b/contrib/tools/python3/src/Lib/asyncio/windows_events.py
@@ -455,6 +455,17 @@ class IocpProactor:
         fut.set_result(value)
         return fut
 
+    @staticmethod
+    def finish_socket_func(trans, key, ov):
+        try:
+            return ov.getresult()
+        except OSError as exc:
+            if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
+                                _overlapped.ERROR_OPERATION_ABORTED):
+                raise ConnectionResetError(*exc.args)
+            else:
+                raise
+
     def recv(self, conn, nbytes, flags=0):
         self._register_with_iocp(conn)
         ov = _overlapped.Overlapped(NULL)
@@ -466,17 +477,7 @@ class IocpProactor:
         except BrokenPipeError:
             return self._result(b'')
 
-        def finish_recv(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-
-        return self._register(ov, conn, finish_recv)
+        return self._register(ov, conn, self.finish_socket_func)
 
     def recv_into(self, conn, buf, flags=0):
         self._register_with_iocp(conn)
@@ -489,17 +490,7 @@ class IocpProactor:
         except BrokenPipeError:
             return self._result(0)
 
-        def finish_recv(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-
-        return self._register(ov, conn, finish_recv)
+        return self._register(ov, conn, self.finish_socket_func)
 
     def recvfrom(self, conn, nbytes, flags=0):
         self._register_with_iocp(conn)
@@ -509,17 +500,7 @@ class IocpProactor:
         except BrokenPipeError:
             return self._result((b'', None))
 
-        def finish_recv(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-
-        return self._register(ov, conn, finish_recv)
+        return self._register(ov, conn, self.finish_socket_func)
 
     def recvfrom_into(self, conn, buf, flags=0):
         self._register_with_iocp(conn)
@@ -547,17 +528,7 @@ class IocpProactor:
 
         ov.WSASendTo(conn.fileno(), buf, flags, addr)
 
-        def finish_send(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-
-        return self._register(ov, conn, finish_send)
+        return self._register(ov, conn, self.finish_socket_func)
 
     def send(self, conn, buf, flags=0):
         self._register_with_iocp(conn)
@@ -567,17 +538,7 @@ class IocpProactor:
         else:
             ov.WriteFile(conn.fileno(), buf)
 
-        def finish_send(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-
-        return self._register(ov, conn, finish_send)
+        return self._register(ov, conn, self.finish_socket_func)
 
     def accept(self, listener):
         self._register_with_iocp(listener)
@@ -648,16 +609,7 @@ class IocpProactor:
                         offset_low, offset_high,
                         count, 0, 0)
 
-        def finish_sendfile(trans, key, ov):
-            try:
-                return ov.getresult()
-            except OSError as exc:
-                if exc.winerror in (_overlapped.ERROR_NETNAME_DELETED,
-                                    _overlapped.ERROR_OPERATION_ABORTED):
-                    raise ConnectionResetError(*exc.args)
-                else:
-                    raise
-        return self._register(ov, sock, finish_sendfile)
+        return self._register(ov, sock, self.finish_socket_func)
 
     def accept_pipe(self, pipe):
         self._register_with_iocp(pipe)
diff --git a/contrib/tools/python3/src/Lib/asyncore.py b/contrib/tools/python3/src/Lib/asyncore.py
deleted file mode 100644
index 57c86871f3..0000000000
--- a/contrib/tools/python3/src/Lib/asyncore.py
+++ /dev/null
@@ -1,647 +0,0 @@
-# -*- Mode: Python -*-
-#   Id: asyncore.py,v 2.51 2000/09/07 22:29:26 rushing Exp
-#   Author: Sam Rushing <rushing@nightmare.com>
-
-# ======================================================================
-# Copyright 1996 by Sam Rushing
-#
-#                         All Rights Reserved
-#
-# Permission to use, copy, modify, and distribute this software and
-# its documentation for any purpose and without fee is hereby
-# granted, provided that the above copyright notice appear in all
-# copies and that both that copyright notice and this permission
-# notice appear in supporting documentation, and that the name of Sam
-# Rushing not be used in advertising or publicity pertaining to
-# distribution of the software without specific, written prior
-# permission.
-#
-# SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
-# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
-# NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR
-# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
-# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
-# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-# ======================================================================
-
-"""Basic infrastructure for asynchronous socket service clients and servers.
-
-There are only two ways to have a program on a single processor do "more
-than one thing at a time".  Multi-threaded programming is the simplest and
-most popular way to do it, but there is another very different technique,
-that lets you have nearly all the advantages of multi-threading, without
-actually using multiple threads. it's really only practical if your program
-is largely I/O bound. If your program is CPU bound, then pre-emptive
-scheduled threads are probably what you really need. Network servers are
-rarely CPU-bound, however.
-
-If your operating system supports the select() system call in its I/O
-library (and nearly all do), then you can use it to juggle multiple
-communication channels at once; doing other work while your I/O is taking
-place in the "background."  Although this strategy can seem strange and
-complex, especially at first, it is in many ways easier to understand and
-control than multi-threaded programming. The module documented here solves
-many of the difficult problems for you, making the task of building
-sophisticated high-performance network servers and clients a snap.
-"""
-
-import select
-import socket
-import sys
-import time
-import warnings
-
-import os
-from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL, \
-     ENOTCONN, ESHUTDOWN, EISCONN, EBADF, ECONNABORTED, EPIPE, EAGAIN, \
-     errorcode
-
-_DEPRECATION_MSG = ('The {name} module is deprecated and will be removed in '
-                    'Python {remove}. The recommended replacement is asyncio')
-warnings._deprecated(__name__, _DEPRECATION_MSG, remove=(3, 12))
-
-
-_DISCONNECTED = frozenset({ECONNRESET, ENOTCONN, ESHUTDOWN, ECONNABORTED, EPIPE,
-                           EBADF})
-
-try:
-    socket_map
-except NameError:
-    socket_map = {}
-
-def _strerror(err):
-    try:
-        return os.strerror(err)
-    except (ValueError, OverflowError, NameError):
-        if err in errorcode:
-            return errorcode[err]
-        return "Unknown error %s" %err
-
-class ExitNow(Exception):
-    pass
-
-_reraised_exceptions = (ExitNow, KeyboardInterrupt, SystemExit)
-
-def read(obj):
-    try:
-        obj.handle_read_event()
-    except _reraised_exceptions:
-        raise
-    except:
-        obj.handle_error()
-
-def write(obj):
-    try:
-        obj.handle_write_event()
-    except _reraised_exceptions:
-        raise
-    except:
-        obj.handle_error()
-
-def _exception(obj):
-    try:
-        obj.handle_expt_event()
-    except _reraised_exceptions:
-        raise
-    except:
-        obj.handle_error()
-
-def readwrite(obj, flags):
-    try:
-        if flags & select.POLLIN:
-            obj.handle_read_event()
-        if flags & select.POLLOUT:
-            obj.handle_write_event()
-        if flags & select.POLLPRI:
-            obj.handle_expt_event()
-        if flags & (select.POLLHUP | select.POLLERR | select.POLLNVAL):
-            obj.handle_close()
-    except OSError as e:
-        if e.errno not in _DISCONNECTED:
-            obj.handle_error()
-        else:
-            obj.handle_close()
-    except _reraised_exceptions:
-        raise
-    except:
-        obj.handle_error()
-
-def poll(timeout=0.0, map=None):
-    if map is None:
-        map = socket_map
-    if map:
-        r = []; w = []; e = []
-        for fd, obj in list(map.items()):
-            is_r = obj.readable()
-            is_w = obj.writable()
-            if is_r:
-                r.append(fd)
-            # accepting sockets should not be writable
-            if is_w and not obj.accepting:
-                w.append(fd)
-            if is_r or is_w:
-                e.append(fd)
-        if [] == r == w == e:
-            time.sleep(timeout)
-            return
-
-        r, w, e = select.select(r, w, e, timeout)
-
-        for fd in r:
-            obj = map.get(fd)
-            if obj is None:
-                continue
-            read(obj)
-
-        for fd in w:
-            obj = map.get(fd)
-            if obj is None:
-                continue
-            write(obj)
-
-        for fd in e:
-            obj = map.get(fd)
-            if obj is None:
-                continue
-            _exception(obj)
-
-def poll2(timeout=0.0, map=None):
-    # Use the poll() support added to the select module in Python 2.0
-    if map is None:
-        map = socket_map
-    if timeout is not None:
-        # timeout is in milliseconds
-        timeout = int(timeout*1000)
-    pollster = select.poll()
-    if map:
-        for fd, obj in list(map.items()):
-            flags = 0
-            if obj.readable():
-                flags |= select.POLLIN | select.POLLPRI
-            # accepting sockets should not be writable
-            if obj.writable() and not obj.accepting:
-                flags |= select.POLLOUT
-            if flags:
-                pollster.register(fd, flags)
-
-        r = pollster.poll(timeout)
-        for fd, flags in r:
-            obj = map.get(fd)
-            if obj is None:
-                continue
-            readwrite(obj, flags)
-
-poll3 = poll2                           # Alias for backward compatibility
-
-def loop(timeout=30.0, use_poll=False, map=None, count=None):
-    if map is None:
-        map = socket_map
-
-    if use_poll and hasattr(select, 'poll'):
-        poll_fun = poll2
-    else:
-        poll_fun = poll
-
-    if count is None:
-        while map:
-            poll_fun(timeout, map)
-
-    else:
-        while map and count > 0:
-            poll_fun(timeout, map)
-            count = count - 1
-
-class dispatcher:
-
-    debug = False
-    connected = False
-    accepting = False
-    connecting = False
-    closing = False
-    addr = None
-    ignore_log_types = frozenset({'warning'})
-
-    def __init__(self, sock=None, map=None):
-        if map is None:
-            self._map = socket_map
-        else:
-            self._map = map
-
-        self._fileno = None
-
-        if sock:
-            # Set to nonblocking just to make sure for cases where we
-            # get a socket from a blocking source.
-            sock.setblocking(False)
-            self.set_socket(sock, map)
-            self.connected = True
-            # The constructor no longer requires that the socket
-            # passed be connected.
-            try:
-                self.addr = sock.getpeername()
-            except OSError as err:
-                if err.errno in (ENOTCONN, EINVAL):
-                    # To handle the case where we got an unconnected
-                    # socket.
-                    self.connected = False
-                else:
-                    # The socket is broken in some unknown way, alert
-                    # the user and remove it from the map (to prevent
-                    # polling of broken sockets).
-                    self.del_channel(map)
-                    raise
-        else:
-            self.socket = None
-
-    def __repr__(self):
-        status = [self.__class__.__module__+"."+self.__class__.__qualname__]
-        if self.accepting and self.addr:
-            status.append('listening')
-        elif self.connected:
-            status.append('connected')
-        if self.addr is not None:
-            try:
-                status.append('%s:%d' % self.addr)
-            except TypeError:
-                status.append(repr(self.addr))
-        return '<%s at %#x>' % (' '.join(status), id(self))
-
-    def add_channel(self, map=None):
-        #self.log_info('adding channel %s' % self)
-        if map is None:
-            map = self._map
-        map[self._fileno] = self
-
-    def del_channel(self, map=None):
-        fd = self._fileno
-        if map is None:
-            map = self._map
-        if fd in map:
-            #self.log_info('closing channel %d:%s' % (fd, self))
-            del map[fd]
-        self._fileno = None
-
-    def create_socket(self, family=socket.AF_INET, type=socket.SOCK_STREAM):
-        self.family_and_type = family, type
-        sock = socket.socket(family, type)
-        sock.setblocking(False)
-        self.set_socket(sock)
-
-    def set_socket(self, sock, map=None):
-        self.socket = sock
-        self._fileno = sock.fileno()
-        self.add_channel(map)
-
-    def set_reuse_addr(self):
-        # try to re-use a server port if possible
-        try:
-            self.socket.setsockopt(
-                socket.SOL_SOCKET, socket.SO_REUSEADDR,
-                self.socket.getsockopt(socket.SOL_SOCKET,
-                                       socket.SO_REUSEADDR) | 1
-                )
-        except OSError:
-            pass
-
-    # ==================================================
-    # predicates for select()
-    # these are used as filters for the lists of sockets
-    # to pass to select().
-    # ==================================================
-
-    def readable(self):
-        return True
-
-    def writable(self):
-        return True
-
-    # ==================================================
-    # socket object methods.
-    # ==================================================
-
-    def listen(self, num):
-        self.accepting = True
-        if os.name == 'nt' and num > 5:
-            num = 5
-        return self.socket.listen(num)
-
-    def bind(self, addr):
-        self.addr = addr
-        return self.socket.bind(addr)
-
-    def connect(self, address):
-        self.connected = False
-        self.connecting = True
-        err = self.socket.connect_ex(address)
-        if err in (EINPROGRESS, EALREADY, EWOULDBLOCK) \
-        or err == EINVAL and os.name == 'nt':
-            self.addr = address
-            return
-        if err in (0, EISCONN):
-            self.addr = address
-            self.handle_connect_event()
-        else:
-            raise OSError(err, errorcode[err])
-
-    def accept(self):
-        # XXX can return either an address pair or None
-        try:
-            conn, addr = self.socket.accept()
-        except TypeError:
-            return None
-        except OSError as why:
-            if why.errno in (EWOULDBLOCK, ECONNABORTED, EAGAIN):
-                return None
-            else:
-                raise
-        else:
-            return conn, addr
-
-    def send(self, data):
-        try:
-            result = self.socket.send(data)
-            return result
-        except OSError as why:
-            if why.errno == EWOULDBLOCK:
-                return 0
-            elif why.errno in _DISCONNECTED:
-                self.handle_close()
-                return 0
-            else:
-                raise
-
-    def recv(self, buffer_size):
-        try:
-            data = self.socket.recv(buffer_size)
-            if not data:
-                # a closed connection is indicated by signaling
-                # a read condition, and having recv() return 0.
-                self.handle_close()
-                return b''
-            else:
-                return data
-        except OSError as why:
-            # winsock sometimes raises ENOTCONN
-            if why.errno in _DISCONNECTED:
-                self.handle_close()
-                return b''
-            else:
-                raise
-
-    def close(self):
-        self.connected = False
-        self.accepting = False
-        self.connecting = False
-        self.del_channel()
-        if self.socket is not None:
-            try:
-                self.socket.close()
-            except OSError as why:
-                if why.errno not in (ENOTCONN, EBADF):
-                    raise
-
-    # log and log_info may be overridden to provide more sophisticated
-    # logging and warning methods. In general, log is for 'hit' logging
-    # and 'log_info' is for informational, warning and error logging.
-
-    def log(self, message):
-        sys.stderr.write('log: %s\n' % str(message))
-
-    def log_info(self, message, type='info'):
-        if type not in self.ignore_log_types:
-            print('%s: %s' % (type, message))
-
-    def handle_read_event(self):
-        if self.accepting:
-            # accepting sockets are never connected, they "spawn" new
-            # sockets that are connected
-            self.handle_accept()
-        elif not self.connected:
-            if self.connecting:
-                self.handle_connect_event()
-            self.handle_read()
-        else:
-            self.handle_read()
-
-    def handle_connect_event(self):
-        err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
-        if err != 0:
-            raise OSError(err, _strerror(err))
-        self.handle_connect()
-        self.connected = True
-        self.connecting = False
-
-    def handle_write_event(self):
-        if self.accepting:
-            # Accepting sockets shouldn't get a write event.
-            # We will pretend it didn't happen.
-            return
-
-        if not self.connected:
-            if self.connecting:
-                self.handle_connect_event()
-        self.handle_write()
-
-    def handle_expt_event(self):
-        # handle_expt_event() is called if there might be an error on the
-        # socket, or if there is OOB data
-        # check for the error condition first
-        err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
-        if err != 0:
-            # we can get here when select.select() says that there is an
-            # exceptional condition on the socket
-            # since there is an error, we'll go ahead and close the socket
-            # like we would in a subclassed handle_read() that received no
-            # data
-            self.handle_close()
-        else:
-            self.handle_expt()
-
-    def handle_error(self):
-        nil, t, v, tbinfo = compact_traceback()
-
-        # sometimes a user repr method will crash.
-        try:
-            self_repr = repr(self)
-        except:
-            self_repr = '<__repr__(self) failed for object at %0x>' % id(self)
-
-        self.log_info(
-            'uncaptured python exception, closing channel %s (%s:%s %s)' % (
-                self_repr,
-                t,
-                v,
-                tbinfo
-                ),
-            'error'
-            )
-        self.handle_close()
-
-    def handle_expt(self):
-        self.log_info('unhandled incoming priority event', 'warning')
-
-    def handle_read(self):
-        self.log_info('unhandled read event', 'warning')
-
-    def handle_write(self):
-        self.log_info('unhandled write event', 'warning')
-
-    def handle_connect(self):
-        self.log_info('unhandled connect event', 'warning')
-
-    def handle_accept(self):
-        pair = self.accept()
-        if pair is not None:
-            self.handle_accepted(*pair)
-
-    def handle_accepted(self, sock, addr):
-        sock.close()
-        self.log_info('unhandled accepted event', 'warning')
-
-    def handle_close(self):
-        self.log_info('unhandled close event', 'warning')
-        self.close()
-
-# ---------------------------------------------------------------------------
-# adds simple buffered output capability, useful for simple clients.
-# [for more sophisticated usage use asynchat.async_chat]
-# ---------------------------------------------------------------------------
-
-class dispatcher_with_send(dispatcher):
-
-    def __init__(self, sock=None, map=None):
-        dispatcher.__init__(self, sock, map)
-        self.out_buffer = b''
-
-    def initiate_send(self):
-        num_sent = 0
-        num_sent = dispatcher.send(self, self.out_buffer[:65536])
-        self.out_buffer = self.out_buffer[num_sent:]
-
-    def handle_write(self):
-        self.initiate_send()
-
-    def writable(self):
-        return (not self.connected) or len(self.out_buffer)
-
-    def send(self, data):
-        if self.debug:
-            self.log_info('sending %s' % repr(data))
-        self.out_buffer = self.out_buffer + data
-        self.initiate_send()
-
-# ---------------------------------------------------------------------------
-# used for debugging.
-# ---------------------------------------------------------------------------
-
-def compact_traceback():
-    t, v, tb = sys.exc_info()
-    tbinfo = []
-    if not tb: # Must have a traceback
-        raise AssertionError("traceback does not exist")
-    while tb:
-        tbinfo.append((
-            tb.tb_frame.f_code.co_filename,
-            tb.tb_frame.f_code.co_name,
-            str(tb.tb_lineno)
-            ))
-        tb = tb.tb_next
-
-    # just to be safe
-    del tb
-
-    file, function, line = tbinfo[-1]
-    info = ' '.join(['[%s|%s|%s]' % x for x in tbinfo])
-    return (file, function, line), t, v, info
-
-def close_all(map=None, ignore_all=False):
-    if map is None:
-        map = socket_map
-    for x in list(map.values()):
-        try:
-            x.close()
-        except OSError as x:
-            if x.errno == EBADF:
-                pass
-            elif not ignore_all:
-                raise
-        except _reraised_exceptions:
-            raise
-        except:
-            if not ignore_all:
-                raise
-    map.clear()
-
-# Asynchronous File I/O:
-#
-# After a little research (reading man pages on various unixen, and
-# digging through the linux kernel), I've determined that select()
-# isn't meant for doing asynchronous file i/o.
-# Heartening, though - reading linux/mm/filemap.c shows that linux
-# supports asynchronous read-ahead.  So _MOST_ of the time, the data
-# will be sitting in memory for us already when we go to read it.
-#
-# What other OS's (besides NT) support async file i/o?  [VMS?]
-#
-# Regardless, this is useful for pipes, and stdin/stdout...
-
-if os.name == 'posix':
-    class file_wrapper:
-        # Here we override just enough to make a file
-        # look like a socket for the purposes of asyncore.
-        # The passed fd is automatically os.dup()'d
-
-        def __init__(self, fd):
-            self.fd = os.dup(fd)
-
-        def __del__(self):
-            if self.fd >= 0:
-                warnings.warn("unclosed file %r" % self, ResourceWarning,
-                              source=self)
-            self.close()
-
-        def recv(self, *args):
-            return os.read(self.fd, *args)
-
-        def send(self, *args):
-            return os.write(self.fd, *args)
-
-        def getsockopt(self, level, optname, buflen=None):
-            if (level == socket.SOL_SOCKET and
-                optname == socket.SO_ERROR and
-                not buflen):
-                return 0
-            raise NotImplementedError("Only asyncore specific behaviour "
-                                      "implemented.")
-
-        read = recv
-        write = send
-
-        def close(self):
-            if self.fd < 0:
-                return
-            fd = self.fd
-            self.fd = -1
-            os.close(fd)
-
-        def fileno(self):
-            return self.fd
-
-    class file_dispatcher(dispatcher):
-
-        def __init__(self, fd, map=None):
-            dispatcher.__init__(self, None, map)
-            self.connected = True
-            try:
-                fd = fd.fileno()
-            except AttributeError:
-                pass
-            self.set_file(fd)
-            # set it to non-blocking mode
-            os.set_blocking(fd, False)
-
-        def set_file(self, fd):
-            self.socket = file_wrapper(fd)
-            self._fileno = self.socket.fileno()
-            self.add_channel()
diff --git a/contrib/tools/python3/src/Lib/base64.py b/contrib/tools/python3/src/Lib/base64.py
index 7e9c2a2ca4..e233647ee7 100755
--- a/contrib/tools/python3/src/Lib/base64.py
+++ b/contrib/tools/python3/src/Lib/base64.py
@@ -508,14 +508,8 @@ MAXBINSIZE = (MAXLINESIZE//4)*3
 
 def encode(input, output):
     """Encode a file; input and output are binary files."""
-    while True:
-        s = input.read(MAXBINSIZE)
-        if not s:
-            break
-        while len(s) < MAXBINSIZE:
-            ns = input.read(MAXBINSIZE-len(s))
-            if not ns:
-                break
+    while s := input.read(MAXBINSIZE):
+        while len(s) < MAXBINSIZE and (ns := input.read(MAXBINSIZE-len(s))):
             s += ns
         line = binascii.b2a_base64(s)
         output.write(line)
@@ -523,10 +517,7 @@ def encode(input, output):
 
 def decode(input, output):
     """Decode a file; input and output are binary files."""
-    while True:
-        line = input.readline()
-        if not line:
-            break
+    while line := input.readline():
         s = binascii.a2b_base64(line)
         output.write(s)
 
@@ -567,13 +558,12 @@ def decodebytes(s):
 def main():
     """Small main program"""
     import sys, getopt
-    usage = """usage: %s [-h|-d|-e|-u|-t] [file|-]
+    usage = f"""usage: {sys.argv[0]} [-h|-d|-e|-u] [file|-]
         -h: print this help message and exit
         -d, -u: decode
-        -e: encode (default)
-        -t: encode and decode string 'Aladdin:open sesame'"""%sys.argv[0]
+        -e: encode (default)"""
     try:
-        opts, args = getopt.getopt(sys.argv[1:], 'hdeut')
+        opts, args = getopt.getopt(sys.argv[1:], 'hdeu')
     except getopt.error as msg:
         sys.stdout = sys.stderr
         print(msg)
@@ -584,7 +574,6 @@ def main():
         if o == '-e': func = encode
         if o == '-d': func = decode
         if o == '-u': func = decode
-        if o == '-t': test(); return
         if o == '-h': print(usage); return
     if args and args[0] != '-':
         with open(args[0], 'rb') as f:
@@ -593,15 +582,5 @@ def main():
         func(sys.stdin.buffer, sys.stdout.buffer)
 
 
-def test():
-    s0 = b"Aladdin:open sesame"
-    print(repr(s0))
-    s1 = encodebytes(s0)
-    print(repr(s1))
-    s2 = decodebytes(s1)
-    print(repr(s2))
-    assert s0 == s2
-
-
 if __name__ == '__main__':
     main()
diff --git a/contrib/tools/python3/src/Lib/bisect.py b/contrib/tools/python3/src/Lib/bisect.py
index d37da74f7b..ca6ca72408 100644
--- a/contrib/tools/python3/src/Lib/bisect.py
+++ b/contrib/tools/python3/src/Lib/bisect.py
@@ -8,6 +8,8 @@ def insort_right(a, x, lo=0, hi=None, *, key=None):
 
     Optional args lo (default 0) and hi (default len(a)) bound the
     slice of a to be searched.
+
+    A custom key function can be supplied to customize the sort order.
     """
     if key is None:
         lo = bisect_right(a, x, lo, hi)
@@ -25,6 +27,8 @@ def bisect_right(a, x, lo=0, hi=None, *, key=None):
 
     Optional args lo (default 0) and hi (default len(a)) bound the
     slice of a to be searched.
+
+    A custom key function can be supplied to customize the sort order.
     """
 
     if lo < 0:
@@ -57,6 +61,8 @@ def insort_left(a, x, lo=0, hi=None, *, key=None):
 
     Optional args lo (default 0) and hi (default len(a)) bound the
     slice of a to be searched.
+
+    A custom key function can be supplied to customize the sort order.
     """
 
     if key is None:
@@ -74,6 +80,8 @@ def bisect_left(a, x, lo=0, hi=None, *, key=None):
 
     Optional args lo (default 0) and hi (default len(a)) bound the
     slice of a to be searched.
+
+    A custom key function can be supplied to customize the sort order.
     """
 
     if lo < 0:
diff --git a/contrib/tools/python3/src/Lib/cProfile.py b/contrib/tools/python3/src/Lib/cProfile.py
index 44c028fe5e..135a12c396 100755
--- a/contrib/tools/python3/src/Lib/cProfile.py
+++ b/contrib/tools/python3/src/Lib/cProfile.py
@@ -7,6 +7,7 @@
 __all__ = ["run", "runctx", "Profile"]
 
 import _lsprof
+import importlib.machinery
 import io
 import profile as _pyprofile
 
@@ -170,9 +171,12 @@ def main():
             sys.path.insert(0, os.path.dirname(progname))
             with io.open_code(progname) as fp:
                 code = compile(fp.read(), progname, 'exec')
+            spec = importlib.machinery.ModuleSpec(name='__main__', loader=None,
+                                                  origin=progname)
             globs = {
-                '__file__': progname,
-                '__name__': '__main__',
+                '__spec__': spec,
+                '__file__': spec.origin,
+                '__name__': spec.name,
                 '__package__': None,
                 '__cached__': None,
             }
diff --git a/contrib/tools/python3/src/Lib/calendar.py b/contrib/tools/python3/src/Lib/calendar.py
index 27a1e09362..97d7cab336 100644
--- a/contrib/tools/python3/src/Lib/calendar.py
+++ b/contrib/tools/python3/src/Lib/calendar.py
@@ -7,8 +7,10 @@ set the first day of the week (0=Monday, 6=Sunday)."""
 
 import sys
 import datetime
+from enum import IntEnum, global_enum
 import locale as _locale
 from itertools import repeat
+import warnings
 
 __all__ = ["IllegalMonthError", "IllegalWeekdayError", "setfirstweekday",
            "firstweekday", "isleap", "leapdays", "weekday", "monthrange",
@@ -16,6 +18,9 @@ __all__ = ["IllegalMonthError", "IllegalWeekdayError", "setfirstweekday",
            "timegm", "month_name", "month_abbr", "day_name", "day_abbr",
            "Calendar", "TextCalendar", "HTMLCalendar", "LocaleTextCalendar",
            "LocaleHTMLCalendar", "weekheader",
+           "Day", "Month", "JANUARY", "FEBRUARY", "MARCH",
+           "APRIL", "MAY", "JUNE", "JULY",
+           "AUGUST", "SEPTEMBER", "OCTOBER", "NOVEMBER", "DECEMBER",
            "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY",
            "SATURDAY", "SUNDAY"]
 
@@ -37,9 +42,46 @@ class IllegalWeekdayError(ValueError):
         return "bad weekday number %r; must be 0 (Monday) to 6 (Sunday)" % self.weekday
 
 
-# Constants for months referenced later
-January = 1
-February = 2
+def __getattr__(name):
+    if name in ('January', 'February'):
+        warnings.warn(f"The '{name}' attribute is deprecated, use '{name.upper()}' instead",
+                      DeprecationWarning, stacklevel=2)
+        if name == 'January':
+            return 1
+        else:
+            return 2
+
+    raise AttributeError(f"module '{__name__}' has no attribute '{name}'")
+
+
+# Constants for months
+@global_enum
+class Month(IntEnum):
+    JANUARY = 1
+    FEBRUARY = 2
+    MARCH = 3
+    APRIL = 4
+    MAY = 5
+    JUNE = 6
+    JULY = 7
+    AUGUST = 8
+    SEPTEMBER = 9
+    OCTOBER = 10
+    NOVEMBER = 11
+    DECEMBER = 12
+
+
+# Constants for days
+@global_enum
+class Day(IntEnum):
+    MONDAY = 0
+    TUESDAY = 1
+    WEDNESDAY = 2
+    THURSDAY = 3
+    FRIDAY = 4
+    SATURDAY = 5
+    SUNDAY = 6
+
 
 # Number of days per month (except for February in leap years)
 mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
@@ -95,9 +137,6 @@ day_abbr = _localized_day('%a')
 month_name = _localized_month('%B')
 month_abbr = _localized_month('%b')
 
-# Constants for weekdays
-(MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY) = range(7)
-
 
 def isleap(year):
     """Return True for leap years, False for non-leap years."""
@@ -116,7 +155,7 @@ def weekday(year, month, day):
     """Return weekday (0-6 ~ Mon-Sun) for year, month (1-12), day (1-31)."""
     if not datetime.MINYEAR <= year <= datetime.MAXYEAR:
         year = 2000 + year % 400
-    return datetime.date(year, month, day).weekday()
+    return Day(datetime.date(year, month, day).weekday())
 
 
 def monthrange(year, month):
@@ -125,12 +164,12 @@ def monthrange(year, month):
     if not 1 <= month <= 12:
         raise IllegalMonthError(month)
     day1 = weekday(year, month, 1)
-    ndays = mdays[month] + (month == February and isleap(year))
+    ndays = mdays[month] + (month == FEBRUARY and isleap(year))
     return day1, ndays
 
 
 def _monthlen(year, month):
-    return mdays[month] + (month == February and isleap(year))
+    return mdays[month] + (month == FEBRUARY and isleap(year))
 
 
 def _prevmonth(year, month):
@@ -260,10 +299,7 @@ class Calendar(object):
         Each month contains between 4 and 6 weeks and each week contains 1-7
         days. Days are datetime.date objects.
         """
-        months = [
-            self.monthdatescalendar(year, i)
-            for i in range(January, January+12)
-        ]
+        months = [self.monthdatescalendar(year, m) for m in Month]
         return [months[i:i+width] for i in range(0, len(months), width) ]
 
     def yeardays2calendar(self, year, width=3):
@@ -273,10 +309,7 @@ class Calendar(object):
         (day number, weekday number) tuples. Day numbers outside this month are
         zero.
         """
-        months = [
-            self.monthdays2calendar(year, i)
-            for i in range(January, January+12)
-        ]
+        months = [self.monthdays2calendar(year, m) for m in Month]
         return [months[i:i+width] for i in range(0, len(months), width) ]
 
     def yeardayscalendar(self, year, width=3):
@@ -285,10 +318,7 @@ class Calendar(object):
         yeardatescalendar()). Entries in the week lists are day numbers.
         Day numbers outside this month are zero.
         """
-        months = [
-            self.monthdayscalendar(year, i)
-            for i in range(January, January+12)
-        ]
+        months = [self.monthdayscalendar(year, m) for m in Month]
         return [months[i:i+width] for i in range(0, len(months), width) ]
 
 
@@ -509,7 +539,7 @@ class HTMLCalendar(Calendar):
         a('\n')
         a('<tr><th colspan="%d" class="%s">%s</th></tr>' % (
             width, self.cssclass_year_head, theyear))
-        for i in range(January, January+12, width):
+        for i in range(JANUARY, JANUARY+12, width):
             # months in this row
             months = range(i, min(i+width, 13))
             a('<tr>')
diff --git a/contrib/tools/python3/src/Lib/cgitb.py b/contrib/tools/python3/src/Lib/cgitb.py
index 8ce0e833a9..f6b97f25c5 100644
--- a/contrib/tools/python3/src/Lib/cgitb.py
+++ b/contrib/tools/python3/src/Lib/cgitb.py
@@ -74,7 +74,7 @@ def lookup(name, frame, locals):
         return 'global', frame.f_globals[name]
     if '__builtins__' in frame.f_globals:
         builtins = frame.f_globals['__builtins__']
-        if type(builtins) is type({}):
+        if isinstance(builtins, dict):
             if name in builtins:
                 return 'builtin', builtins[name]
         else:
diff --git a/contrib/tools/python3/src/Lib/code.py b/contrib/tools/python3/src/Lib/code.py
index 76000f8c8b..2bd5fa3e79 100644
--- a/contrib/tools/python3/src/Lib/code.py
+++ b/contrib/tools/python3/src/Lib/code.py
@@ -106,6 +106,7 @@ class InteractiveInterpreter:
 
         """
         type, value, tb = sys.exc_info()
+        sys.last_exc = value
         sys.last_type = type
         sys.last_value = value
         sys.last_traceback = tb
@@ -119,7 +120,7 @@ class InteractiveInterpreter:
             else:
                 # Stuff in the right filename
                 value = SyntaxError(msg, (filename, lineno, offset, line))
-                sys.last_value = value
+                sys.last_exc = sys.last_value = value
         if sys.excepthook is sys.__excepthook__:
             lines = traceback.format_exception_only(type, value)
             self.write(''.join(lines))
@@ -138,6 +139,7 @@ class InteractiveInterpreter:
         """
         sys.last_type, sys.last_value, last_tb = ei = sys.exc_info()
         sys.last_traceback = last_tb
+        sys.last_exc = ei[1]
         try:
             lines = traceback.format_exception(ei[0], ei[1], last_tb.tb_next)
             if sys.excepthook is sys.__excepthook__:
diff --git a/contrib/tools/python3/src/Lib/codecs.py b/contrib/tools/python3/src/Lib/codecs.py
index c6165fcb14..82f23983e7 100644
--- a/contrib/tools/python3/src/Lib/codecs.py
+++ b/contrib/tools/python3/src/Lib/codecs.py
@@ -1127,13 +1127,3 @@ except LookupError:
 _false = 0
 if _false:
     import encodings
-
-### Tests
-
-if __name__ == '__main__':
-
-    # Make stdout translate Latin-1 output into UTF-8 output
-    sys.stdout = EncodedFile(sys.stdout, 'latin-1', 'utf-8')
-
-    # Have stdin translate Latin-1 input into UTF-8 input
-    sys.stdin = EncodedFile(sys.stdin, 'utf-8', 'latin-1')
diff --git a/contrib/tools/python3/src/Lib/codeop.py b/contrib/tools/python3/src/Lib/codeop.py
index e64911ee5a..4dd096574b 100644
--- a/contrib/tools/python3/src/Lib/codeop.py
+++ b/contrib/tools/python3/src/Lib/codeop.py
@@ -88,6 +88,7 @@ def _compile(source, filename, symbol, incomplete_input=True):
         flags |= PyCF_DONT_IMPLY_DEDENT
     return compile(source, filename, symbol, flags)
 
+
 def compile_command(source, filename="<input>", symbol="single"):
     r"""Compile a command and determine whether it is incomplete.
 
diff --git a/contrib/tools/python3/src/Lib/collections/__init__.py b/contrib/tools/python3/src/Lib/collections/__init__.py
index 69398ac116..8652dc8a4e 100644
--- a/contrib/tools/python3/src/Lib/collections/__init__.py
+++ b/contrib/tools/python3/src/Lib/collections/__init__.py
@@ -46,6 +46,11 @@ else:
     _collections_abc.MutableSequence.register(deque)
 
 try:
+    from _collections import _deque_iterator
+except ImportError:
+    pass
+
+try:
     from _collections import defaultdict
 except ImportError:
     pass
@@ -269,7 +274,7 @@ class OrderedDict(dict):
         'od.__repr__() <==> repr(od)'
         if not self:
             return '%s()' % (self.__class__.__name__,)
-        return '%s(%r)' % (self.__class__.__name__, list(self.items()))
+        return '%s(%r)' % (self.__class__.__name__, dict(self.items()))
 
     def __reduce__(self):
         'Return state information for pickling'
@@ -509,9 +514,12 @@ def namedtuple(typename, field_names, *, rename=False, defaults=None, module=Non
     # specified a particular module.
     if module is None:
         try:
-            module = _sys._getframe(1).f_globals.get('__name__', '__main__')
-        except (AttributeError, ValueError):
-            pass
+            module = _sys._getframemodulename(1) or '__main__'
+        except AttributeError:
+            try:
+                module = _sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                pass
     if module is not None:
         result.__module__ = module
 
@@ -1013,8 +1021,8 @@ class ChainMap(_collections_abc.MutableMapping):
 
     def __iter__(self):
         d = {}
-        for mapping in reversed(self.maps):
-            d.update(dict.fromkeys(mapping))    # reuses stored hash values if possible
+        for mapping in map(dict.fromkeys, reversed(self.maps)):
+            d |= mapping                        # reuses stored hash values if possible
         return iter(d)
 
     def __contains__(self, key):
@@ -1134,10 +1142,17 @@ class UserDict(_collections_abc.MutableMapping):
     def __iter__(self):
         return iter(self.data)
 
-    # Modify __contains__ to work correctly when __missing__ is present
+    # Modify __contains__ and get() to work like dict
+    # does when __missing__ is present.
     def __contains__(self, key):
         return key in self.data
 
+    def get(self, key, default=None):
+        if key in self:
+            return self[key]
+        return default
+
+
     # Now, add the methods in dicts but not in MutableMapping
     def __repr__(self):
         return repr(self.data)
diff --git a/contrib/tools/python3/src/Lib/compileall.py b/contrib/tools/python3/src/Lib/compileall.py
index a388931fb5..d394156ced 100644
--- a/contrib/tools/python3/src/Lib/compileall.py
+++ b/contrib/tools/python3/src/Lib/compileall.py
@@ -97,9 +97,15 @@ def compile_dir(dir, maxlevels=None, ddir=None, force=False,
     files = _walk_dir(dir, quiet=quiet, maxlevels=maxlevels)
     success = True
     if workers != 1 and ProcessPoolExecutor is not None:
+        import multiprocessing
+        if multiprocessing.get_start_method() == 'fork':
+            mp_context = multiprocessing.get_context('forkserver')
+        else:
+            mp_context = None
         # If workers == 0, let ProcessPoolExecutor choose
         workers = workers or None
-        with ProcessPoolExecutor(max_workers=workers) as executor:
+        with ProcessPoolExecutor(max_workers=workers,
+                                 mp_context=mp_context) as executor:
             results = executor.map(partial(compile_file,
                                            ddir=ddir, force=force,
                                            rx=rx, quiet=quiet,
diff --git a/contrib/tools/python3/src/Lib/concurrent/futures/process.py b/contrib/tools/python3/src/Lib/concurrent/futures/process.py
index 952fa90345..0e45288396 100644
--- a/contrib/tools/python3/src/Lib/concurrent/futures/process.py
+++ b/contrib/tools/python3/src/Lib/concurrent/futures/process.py
@@ -49,6 +49,8 @@ import os
 from concurrent.futures import _base
 import queue
 import multiprocessing as mp
+# This import is required to load the multiprocessing.connection submodule
+# so that it can be accessed later as `mp.connection`
 import multiprocessing.connection
 from multiprocessing.queues import Queue
 import threading
@@ -339,7 +341,14 @@ class _ExecutorManagerThread(threading.Thread):
         # Main loop for the executor manager thread.
 
         while True:
-            self.add_call_item_to_queue()
+            # gh-109047: During Python finalization, self.call_queue.put()
+            # creation of a thread can fail with RuntimeError.
+            try:
+                self.add_call_item_to_queue()
+            except BaseException as exc:
+                cause = format_exception(exc)
+                self.terminate_broken(cause)
+                return
 
             result_item, is_broken, cause = self.wait_result_broken_or_wakeup()
 
@@ -423,8 +432,8 @@ class _ExecutorManagerThread(threading.Thread):
             try:
                 result_item = result_reader.recv()
                 is_broken = False
-            except BaseException as e:
-                cause = format_exception(type(e), e, e.__traceback__)
+            except BaseException as exc:
+                cause = format_exception(exc)
 
         elif wakeup_reader in ready:
             is_broken = False
@@ -471,7 +480,7 @@ class _ExecutorManagerThread(threading.Thread):
         return (_global_shutdown or executor is None
                 or executor._shutdown_thread)
 
-    def terminate_broken(self, cause):
+    def _terminate_broken(self, cause):
         # Terminate the executor because it is in a broken state. The cause
         # argument can be used to display more information on the error that
         # lead the executor into becoming broken.
@@ -496,7 +505,14 @@ class _ExecutorManagerThread(threading.Thread):
 
         # Mark pending tasks as failed.
         for work_id, work_item in self.pending_work_items.items():
-            work_item.future.set_exception(bpe)
+            try:
+                work_item.future.set_exception(bpe)
+            except _base.InvalidStateError:
+                # set_exception() fails if the future is cancelled: ignore it.
+                # Trying to check if the future is cancelled before calling
+                # set_exception() would leave a race condition if the future is
+                # cancelled between the check and set_exception().
+                pass
             # Delete references to object. See issue16284
             del work_item
         self.pending_work_items.clear()
@@ -506,17 +522,14 @@ class _ExecutorManagerThread(threading.Thread):
         for p in self.processes.values():
             p.terminate()
 
-        # Prevent queue writing to a pipe which is no longer read.
-        # https://github.com/python/cpython/issues/94777
-        self.call_queue._reader.close()
-
-        # gh-107219: Close the connection writer which can unblock
-        # Queue._feed() if it was stuck in send_bytes().
-        if sys.platform == 'win32':
-            self.call_queue._writer.close()
+        self.call_queue._terminate_broken()
 
         # clean up resources
-        self.join_executor_internals()
+        self._join_executor_internals(broken=True)
+
+    def terminate_broken(self, cause):
+        with self.shutdown_lock:
+            self._terminate_broken(cause)
 
     def flag_executor_shutting_down(self):
         # Flag the executor as shutting down and cancel remaining tasks if
@@ -559,15 +572,24 @@ class _ExecutorManagerThread(threading.Thread):
                     break
 
     def join_executor_internals(self):
-        self.shutdown_workers()
+        with self.shutdown_lock:
+            self._join_executor_internals()
+
+    def _join_executor_internals(self, broken=False):
+        # If broken, call_queue was closed and so can no longer be used.
+        if not broken:
+            self.shutdown_workers()
+
         # Release the queue's resources as soon as possible.
         self.call_queue.close()
         self.call_queue.join_thread()
-        with self.shutdown_lock:
-            self.thread_wakeup.close()
+        self.thread_wakeup.close()
+
         # If .join() is not called on the created processes then
         # some ctx.Queue methods may deadlock on Mac OS X.
         for p in self.processes.values():
+            if broken:
+                p.terminate()
             p.join()
 
     def get_n_children_alive(self):
@@ -639,9 +661,9 @@ class ProcessPoolExecutor(_base.Executor):
             max_workers: The maximum number of processes that can be used to
                 execute the given calls. If None or not given then as many
                 worker processes will be created as the machine has processors.
-            mp_context: A multiprocessing context to launch the workers. This
-                object should provide SimpleQueue, Queue and Process. Useful
-                to allow specific multiprocessing start methods.
+            mp_context: A multiprocessing context to launch the workers created
+                using the multiprocessing.get_context('start method') API. This
+                object should provide SimpleQueue, Queue and Process.
             initializer: A callable used to initialize worker processes.
             initargs: A tuple of arguments to pass to the initializer.
             max_tasks_per_child: The maximum number of tasks a worker process
diff --git a/contrib/tools/python3/src/Lib/concurrent/futures/thread.py b/contrib/tools/python3/src/Lib/concurrent/futures/thread.py
index 51c942f51a..3b3a36a509 100644
--- a/contrib/tools/python3/src/Lib/concurrent/futures/thread.py
+++ b/contrib/tools/python3/src/Lib/concurrent/futures/thread.py
@@ -43,7 +43,7 @@ if hasattr(os, 'register_at_fork'):
                         after_in_parent=_global_shutdown_lock.release)
 
 
-class _WorkItem(object):
+class _WorkItem:
     def __init__(self, future, fn, args, kwargs):
         self.future = future
         self.fn = fn
@@ -78,17 +78,20 @@ def _worker(executor_reference, work_queue, initializer, initargs):
             return
     try:
         while True:
-            work_item = work_queue.get(block=True)
-            if work_item is not None:
-                work_item.run()
-                # Delete references to object. See issue16284
-                del work_item
-
-                # attempt to increment idle count
+            try:
+                work_item = work_queue.get_nowait()
+            except queue.Empty:
+                # attempt to increment idle count if queue is empty
                 executor = executor_reference()
                 if executor is not None:
                     executor._idle_semaphore.release()
                 del executor
+                work_item = work_queue.get(block=True)
+
+            if work_item is not None:
+                work_item.run()
+                # Delete references to object. See GH-60488
+                del work_item
                 continue
 
             executor = executor_reference()
diff --git a/contrib/tools/python3/src/Lib/configparser.py b/contrib/tools/python3/src/Lib/configparser.py
index 5df1d3cfe2..e8aae21794 100644
--- a/contrib/tools/python3/src/Lib/configparser.py
+++ b/contrib/tools/python3/src/Lib/configparser.py
@@ -149,14 +149,14 @@ import re
 import sys
 import warnings
 
-__all__ = ["NoSectionError", "DuplicateOptionError", "DuplicateSectionError",
+__all__ = ("NoSectionError", "DuplicateOptionError", "DuplicateSectionError",
            "NoOptionError", "InterpolationError", "InterpolationDepthError",
            "InterpolationMissingOptionError", "InterpolationSyntaxError",
            "ParsingError", "MissingSectionHeaderError",
-           "ConfigParser", "SafeConfigParser", "RawConfigParser",
+           "ConfigParser", "RawConfigParser",
            "Interpolation", "BasicInterpolation",  "ExtendedInterpolation",
            "LegacyInterpolation", "SectionProxy", "ConverterMapping",
-           "DEFAULTSECT", "MAX_INTERPOLATION_DEPTH"]
+           "DEFAULTSECT", "MAX_INTERPOLATION_DEPTH")
 
 _default_dict = dict
 DEFAULTSECT = "DEFAULT"
@@ -298,41 +298,12 @@ class InterpolationDepthError(InterpolationError):
 class ParsingError(Error):
     """Raised when a configuration file does not follow legal syntax."""
 
-    def __init__(self, source=None, filename=None):
-        # Exactly one of `source'/`filename' arguments has to be given.
-        # `filename' kept for compatibility.
-        if filename and source:
-            raise ValueError("Cannot specify both `filename' and `source'. "
-                             "Use `source'.")
-        elif not filename and not source:
-            raise ValueError("Required argument `source' not given.")
-        elif filename:
-            source = filename
-        Error.__init__(self, 'Source contains parsing errors: %r' % source)
+    def __init__(self, source):
+        super().__init__(f'Source contains parsing errors: {source!r}')
         self.source = source
         self.errors = []
         self.args = (source, )
 
-    @property
-    def filename(self):
-        """Deprecated, use `source'."""
-        warnings.warn(
-            "The 'filename' attribute will be removed in Python 3.12. "
-            "Use 'source' instead.",
-            DeprecationWarning, stacklevel=2
-        )
-        return self.source
-
-    @filename.setter
-    def filename(self, value):
-        """Deprecated, user `source'."""
-        warnings.warn(
-            "The 'filename' attribute will be removed in Python 3.12. "
-            "Use 'source' instead.",
-            DeprecationWarning, stacklevel=2
-        )
-        self.source = value
-
     def append(self, lineno, line):
         self.errors.append((lineno, line))
         self.message += '\n\t[line %2d]: %s' % (lineno, line)
@@ -769,15 +740,6 @@ class RawConfigParser(MutableMapping):
                 elements_added.add((section, key))
                 self.set(section, key, value)
 
-    def readfp(self, fp, filename=None):
-        """Deprecated, use read_file instead."""
-        warnings.warn(
-            "This method will be removed in Python 3.12. "
-            "Use 'parser.read_file()' instead.",
-            DeprecationWarning, stacklevel=2
-        )
-        self.read_file(fp, source=filename)
-
     def get(self, section, option, *, raw=False, vars=None, fallback=_UNSET):
         """Get an option value for a given section.
 
@@ -1240,19 +1202,6 @@ class ConfigParser(RawConfigParser):
             self._interpolation = hold_interpolation
 
 
-class SafeConfigParser(ConfigParser):
-    """ConfigParser alias for backwards compatibility purposes."""
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        warnings.warn(
-            "The SafeConfigParser class has been renamed to ConfigParser "
-            "in Python 3.2. This alias will be removed in Python 3.12."
-            " Use ConfigParser directly instead.",
-            DeprecationWarning, stacklevel=2
-        )
-
-
 class SectionProxy(MutableMapping):
     """A proxy for a single section from a parser."""
 
diff --git a/contrib/tools/python3/src/Lib/contextlib.py b/contrib/tools/python3/src/Lib/contextlib.py
index 4a338f5c63..b831d8916c 100644
--- a/contrib/tools/python3/src/Lib/contextlib.py
+++ b/contrib/tools/python3/src/Lib/contextlib.py
@@ -155,7 +155,7 @@ class _GeneratorContextManager(
                 # tell if we get the same exception back
                 value = typ()
             try:
-                self.gen.throw(typ, value, traceback)
+                self.gen.throw(value)
             except StopIteration as exc:
                 # Suppress StopIteration *unless* it's the same exception that
                 # was passed to throw().  This prevents a StopIteration
@@ -228,7 +228,7 @@ class _AsyncGeneratorContextManager(
                 # tell if we get the same exception back
                 value = typ()
             try:
-                await self.gen.athrow(typ, value, traceback)
+                await self.gen.athrow(value)
             except StopAsyncIteration as exc:
                 # Suppress StopIteration *unless* it's the same exception that
                 # was passed to throw().  This prevents a StopIteration
@@ -453,7 +453,16 @@ class suppress(AbstractContextManager):
         # exactly reproduce the limitations of the CPython interpreter.
         #
         # See http://bugs.python.org/issue12029 for more details
-        return exctype is not None and issubclass(exctype, self._exceptions)
+        if exctype is None:
+            return
+        if issubclass(exctype, self._exceptions):
+            return True
+        if issubclass(exctype, BaseExceptionGroup):
+            match, rest = excinst.split(self._exceptions)
+            if rest is None:
+                return True
+            raise rest
+        return False
 
 
 class _BaseExitStack:
diff --git a/contrib/tools/python3/src/Lib/copy.py b/contrib/tools/python3/src/Lib/copy.py
index 1b276afe08..da2908ef62 100644
--- a/contrib/tools/python3/src/Lib/copy.py
+++ b/contrib/tools/python3/src/Lib/copy.py
@@ -56,11 +56,6 @@ class Error(Exception):
     pass
 error = Error   # backward compatibility
 
-try:
-    from org.python.core import PyStringMap
-except ImportError:
-    PyStringMap = None
-
 __all__ = ["Error", "copy", "deepcopy"]
 
 def copy(x):
@@ -106,13 +101,11 @@ _copy_dispatch = d = {}
 
 def _copy_immutable(x):
     return x
-for t in (type(None), int, float, bool, complex, str, tuple,
+for t in (types.NoneType, int, float, bool, complex, str, tuple,
           bytes, frozenset, type, range, slice, property,
-          types.BuiltinFunctionType, type(Ellipsis), type(NotImplemented),
-          types.FunctionType, weakref.ref):
-    d[t] = _copy_immutable
-t = getattr(types, "CodeType", None)
-if t is not None:
+          types.BuiltinFunctionType, types.EllipsisType,
+          types.NotImplementedType, types.FunctionType, types.CodeType,
+          weakref.ref):
     d[t] = _copy_immutable
 
 d[list] = list.copy
@@ -120,9 +113,6 @@ d[dict] = dict.copy
 d[set] = set.copy
 d[bytearray] = bytearray.copy
 
-if PyStringMap is not None:
-    d[PyStringMap] = PyStringMap.copy
-
 del d, t
 
 def deepcopy(x, memo=None, _nil=[]):
@@ -181,9 +171,9 @@ _deepcopy_dispatch = d = {}
 
 def _deepcopy_atomic(x, memo):
     return x
-d[type(None)] = _deepcopy_atomic
-d[type(Ellipsis)] = _deepcopy_atomic
-d[type(NotImplemented)] = _deepcopy_atomic
+d[types.NoneType] = _deepcopy_atomic
+d[types.EllipsisType] = _deepcopy_atomic
+d[types.NotImplementedType] = _deepcopy_atomic
 d[int] = _deepcopy_atomic
 d[float] = _deepcopy_atomic
 d[bool] = _deepcopy_atomic
@@ -231,8 +221,6 @@ def _deepcopy_dict(x, memo, deepcopy=deepcopy):
         y[deepcopy(key, memo)] = deepcopy(value, memo)
     return y
 d[dict] = _deepcopy_dict
-if PyStringMap is not None:
-    d[PyStringMap] = _deepcopy_dict
 
 def _deepcopy_method(x, memo): # Copy instance methods
     return type(x)(x.__func__, deepcopy(x.__self__, memo))
@@ -301,4 +289,4 @@ def _reconstruct(x, memo, func, args,
                 y[key] = value
     return y
 
-del types, weakref, PyStringMap
+del types, weakref
diff --git a/contrib/tools/python3/src/Lib/copyreg.py b/contrib/tools/python3/src/Lib/copyreg.py
index c8a52a2dc6..578392409b 100644
--- a/contrib/tools/python3/src/Lib/copyreg.py
+++ b/contrib/tools/python3/src/Lib/copyreg.py
@@ -25,16 +25,10 @@ def constructor(object):
 
 # Example: provide pickling support for complex numbers.
 
-try:
-    complex
-except NameError:
-    pass
-else:
+def pickle_complex(c):
+    return complex, (c.real, c.imag)
 
-    def pickle_complex(c):
-        return complex, (c.real, c.imag)
-
-    pickle(complex, pickle_complex, complex)
+pickle(complex, pickle_complex, complex)
 
 def pickle_union(obj):
     import functools, operator
diff --git a/contrib/tools/python3/src/Lib/csv.py b/contrib/tools/python3/src/Lib/csv.py
index bb3ee269ae..77f30c8d2b 100644
--- a/contrib/tools/python3/src/Lib/csv.py
+++ b/contrib/tools/python3/src/Lib/csv.py
@@ -4,16 +4,19 @@ csv.py - read/write/investigate CSV files
 """
 
 import re
+import types
 from _csv import Error, __version__, writer, reader, register_dialect, \
                  unregister_dialect, get_dialect, list_dialects, \
                  field_size_limit, \
                  QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE, \
+                 QUOTE_STRINGS, QUOTE_NOTNULL, \
                  __doc__
 from _csv import Dialect as _Dialect
 
 from io import StringIO
 
 __all__ = ["QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
+           "QUOTE_STRINGS", "QUOTE_NOTNULL",
            "Error", "Dialect", "__doc__", "excel", "excel_tab",
            "field_size_limit", "reader", "writer",
            "register_dialect", "get_dialect", "list_dialects", "Sniffer",
@@ -80,6 +83,8 @@ register_dialect("unix", unix_dialect)
 class DictReader:
     def __init__(self, f, fieldnames=None, restkey=None, restval=None,
                  dialect="excel", *args, **kwds):
+        if fieldnames is not None and iter(fieldnames) is fieldnames:
+            fieldnames = list(fieldnames)
         self._fieldnames = fieldnames   # list of keys for the dict
         self.restkey = restkey          # key to catch long rows
         self.restval = restval          # default value for short rows
@@ -126,13 +131,18 @@ class DictReader:
                 d[key] = self.restval
         return d
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 class DictWriter:
     def __init__(self, f, fieldnames, restval="", extrasaction="raise",
                  dialect="excel", *args, **kwds):
+        if fieldnames is not None and iter(fieldnames) is fieldnames:
+            fieldnames = list(fieldnames)
         self.fieldnames = fieldnames    # list of keys for the dict
         self.restval = restval          # for writing short dicts
-        if extrasaction.lower() not in ("raise", "ignore"):
+        extrasaction = extrasaction.lower()
+        if extrasaction not in ("raise", "ignore"):
             raise ValueError("extrasaction (%s) must be 'raise' or 'ignore'"
                              % extrasaction)
         self.extrasaction = extrasaction
@@ -156,11 +166,8 @@ class DictWriter:
     def writerows(self, rowdicts):
         return self.writer.writerows(map(self._dict_to_list, rowdicts))
 
-# Guard Sniffer's type checking against builds that exclude complex()
-try:
-    complex
-except NameError:
-    complex = float
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 class Sniffer:
     '''
@@ -428,7 +435,7 @@ class Sniffer:
         # on whether it's a header
         hasHeader = 0
         for col, colType in columnTypes.items():
-            if type(colType) == type(0): # it's a length
+            if isinstance(colType, int): # it's a length
                 if len(header[col]) != colType:
                     hasHeader += 1
                 else:
diff --git a/contrib/tools/python3/src/Lib/ctypes/__init__.py b/contrib/tools/python3/src/Lib/ctypes/__init__.py
index de0f828243..45b5d7f8e9 100644
--- a/contrib/tools/python3/src/Lib/ctypes/__init__.py
+++ b/contrib/tools/python3/src/Lib/ctypes/__init__.py
@@ -11,6 +11,7 @@ from _ctypes import CFuncPtr as _CFuncPtr
 from _ctypes import __version__ as _ctypes_version
 from _ctypes import RTLD_LOCAL, RTLD_GLOBAL
 from _ctypes import ArgumentError
+from _ctypes import SIZEOF_TIME_T
 from .util import find_library as _find_library
 
 from struct import calcsize as _calcsize
@@ -344,6 +345,8 @@ class CDLL(object):
                  use_errno=False,
                  use_last_error=False,
                  winmode=None):
+        if name and not isinstance(name, dict):
+            name = _os.fspath(name)
         self._name = name
         flags = self._func_flags_
         if use_errno:
@@ -457,7 +460,10 @@ class LibraryLoader(object):
     def __getattr__(self, name):
         if name[0] == '_':
             raise AttributeError(name)
-        dll = self._dlltype(name)
+        try:
+            dll = self._dlltype(name)
+        except OSError:
+            raise AttributeError(name)
         setattr(self, name, dll)
         return dll
 
@@ -585,4 +591,11 @@ for kind in [c_ushort, c_uint, c_ulong, c_ulonglong]:
     elif sizeof(kind) == 8: c_uint64 = kind
 del(kind)
 
+if SIZEOF_TIME_T == 8:
+    c_time_t = c_int64
+elif SIZEOF_TIME_T == 4:
+    c_time_t = c_int32
+else:
+    raise SystemError(f"Unexpected sizeof(time_t): {SIZEOF_TIME_T=}")
+
 _reset_cache()
diff --git a/contrib/tools/python3/src/Lib/ctypes/_aix.py b/contrib/tools/python3/src/Lib/ctypes/_aix.py
index fc3e95cbcc..ee790f713a 100644
--- a/contrib/tools/python3/src/Lib/ctypes/_aix.py
+++ b/contrib/tools/python3/src/Lib/ctypes/_aix.py
@@ -108,12 +108,8 @@ def get_ld_headers(file):
     p = Popen(["/usr/bin/dump", f"-X{AIX_ABI}", "-H", file],
         universal_newlines=True, stdout=PIPE, stderr=DEVNULL)
     # be sure to read to the end-of-file - getting all entries
-    while True:
-        ld_header = get_ld_header(p)
-        if ld_header:
-            ldr_headers.append((ld_header, get_ld_header_info(p)))
-        else:
-            break
+    while ld_header := get_ld_header(p):
+        ldr_headers.append((ld_header, get_ld_header_info(p)))
     p.stdout.close()
     p.wait()
     return ldr_headers
diff --git a/contrib/tools/python3/src/Lib/ctypes/_endian.py b/contrib/tools/python3/src/Lib/ctypes/_endian.py
index 6f674b2137..04389008a8 100644
--- a/contrib/tools/python3/src/Lib/ctypes/_endian.py
+++ b/contrib/tools/python3/src/Lib/ctypes/_endian.py
@@ -37,7 +37,7 @@ class _swapped_union_meta(_swapped_meta, type(Union)): pass
 ################################################################
 
 # Note: The Structure metaclass checks for the *presence* (not the
-# value!) of a _swapped_bytes_ attribute to determine the bit order in
+# value!) of a _swappedbytes_ attribute to determine the bit order in
 # structures containing bit fields.
 
 if sys.byteorder == "little":
diff --git a/contrib/tools/python3/src/Lib/ctypes/wintypes.py b/contrib/tools/python3/src/Lib/ctypes/wintypes.py
index c619d27596..9c4e721438 100644
--- a/contrib/tools/python3/src/Lib/ctypes/wintypes.py
+++ b/contrib/tools/python3/src/Lib/ctypes/wintypes.py
@@ -1,7 +1,7 @@
 # The most useful windows datatypes
 import ctypes
 
-BYTE = ctypes.c_byte
+BYTE = ctypes.c_ubyte
 WORD = ctypes.c_ushort
 DWORD = ctypes.c_ulong
 
diff --git a/contrib/tools/python3/src/Lib/curses/ascii.py b/contrib/tools/python3/src/Lib/curses/ascii.py
index 5b243be681..95acff3392 100644
--- a/contrib/tools/python3/src/Lib/curses/ascii.py
+++ b/contrib/tools/python3/src/Lib/curses/ascii.py
@@ -46,7 +46,7 @@ controlnames = [
 ]
 
 def _ctoi(c):
-    if type(c) == type(""):
+    if isinstance(c, str):
         return ord(c)
     else:
         return c
@@ -69,19 +69,19 @@ def isctrl(c): return 0 <= _ctoi(c) < 32
 def ismeta(c): return _ctoi(c) > 127
 
 def ascii(c):
-    if type(c) == type(""):
+    if isinstance(c, str):
         return chr(_ctoi(c) & 0x7f)
     else:
         return _ctoi(c) & 0x7f
 
 def ctrl(c):
-    if type(c) == type(""):
+    if isinstance(c, str):
         return chr(_ctoi(c) & 0x1f)
     else:
         return _ctoi(c) & 0x1f
 
 def alt(c):
-    if type(c) == type(""):
+    if isinstance(c, str):
         return chr(_ctoi(c) | 0x80)
     else:
         return _ctoi(c) | 0x80
diff --git a/contrib/tools/python3/src/Lib/curses/textpad.py b/contrib/tools/python3/src/Lib/curses/textpad.py
index 2079953a06..aa87061b8d 100644
--- a/contrib/tools/python3/src/Lib/curses/textpad.py
+++ b/contrib/tools/python3/src/Lib/curses/textpad.py
@@ -102,7 +102,10 @@ class Textbox:
                 self._insert_printable_char(ch)
         elif ch == curses.ascii.SOH:                           # ^a
             self.win.move(y, 0)
-        elif ch in (curses.ascii.STX,curses.KEY_LEFT, curses.ascii.BS,curses.KEY_BACKSPACE):
+        elif ch in (curses.ascii.STX,curses.KEY_LEFT,
+                    curses.ascii.BS,
+                    curses.KEY_BACKSPACE,
+                    curses.ascii.DEL):
             if x > 0:
                 self.win.move(y, x-1)
             elif y == 0:
@@ -111,7 +114,7 @@ class Textbox:
                 self.win.move(y-1, self._end_of_line(y-1))
             else:
                 self.win.move(y-1, self.maxx)
-            if ch in (curses.ascii.BS, curses.KEY_BACKSPACE):
+            if ch in (curses.ascii.BS, curses.KEY_BACKSPACE, curses.ascii.DEL):
                 self.win.delch()
         elif ch == curses.ascii.EOT:                           # ^d
             self.win.delch()
diff --git a/contrib/tools/python3/src/Lib/dataclasses.py b/contrib/tools/python3/src/Lib/dataclasses.py
index 148daf4533..3eacba840d 100644
--- a/contrib/tools/python3/src/Lib/dataclasses.py
+++ b/contrib/tools/python3/src/Lib/dataclasses.py
@@ -4,7 +4,6 @@ import copy
 import types
 import inspect
 import keyword
-import builtins
 import functools
 import itertools
 import abc
@@ -223,6 +222,29 @@ _POST_INIT_NAME = '__post_init__'
 # https://bugs.python.org/issue33453 for details.
 _MODULE_IDENTIFIER_RE = re.compile(r'^(?:\s*(\w+)\s*\.)?\s*(\w+)')
 
+# Atomic immutable types which don't require any recursive handling and for which deepcopy
+# returns the same object. We can provide a fast-path for these types in asdict and astuple.
+_ATOMIC_TYPES = frozenset({
+    # Common JSON Serializable types
+    types.NoneType,
+    bool,
+    int,
+    float,
+    str,
+    # Other common types
+    complex,
+    bytes,
+    # Other types that are also unaffected by deepcopy
+    types.EllipsisType,
+    types.NotImplementedType,
+    types.CodeType,
+    types.BuiltinFunctionType,
+    types.FunctionType,
+    type,
+    range,
+    property,
+})
+
 # This function's logic is copied from "recursive_repr" function in
 # reprlib module to avoid dependency.
 def _recursive_repr(user_function):
@@ -341,15 +363,25 @@ class _DataclassParams:
                  'order',
                  'unsafe_hash',
                  'frozen',
+                 'match_args',
+                 'kw_only',
+                 'slots',
+                 'weakref_slot',
                  )
 
-    def __init__(self, init, repr, eq, order, unsafe_hash, frozen):
+    def __init__(self,
+                 init, repr, eq, order, unsafe_hash, frozen,
+                 match_args, kw_only, slots, weakref_slot):
         self.init = init
         self.repr = repr
         self.eq = eq
         self.order = order
         self.unsafe_hash = unsafe_hash
         self.frozen = frozen
+        self.match_args = match_args
+        self.kw_only = kw_only
+        self.slots = slots
+        self.weakref_slot = weakref_slot
 
     def __repr__(self):
         return ('_DataclassParams('
@@ -358,7 +390,11 @@ class _DataclassParams:
                 f'eq={self.eq!r},'
                 f'order={self.order!r},'
                 f'unsafe_hash={self.unsafe_hash!r},'
-                f'frozen={self.frozen!r}'
+                f'frozen={self.frozen!r},'
+                f'match_args={self.match_args!r},'
+                f'kw_only={self.kw_only!r},'
+                f'slots={self.slots!r},'
+                f'weakref_slot={self.weakref_slot!r}'
                 ')')
 
 
@@ -419,14 +455,18 @@ def _create_fn(name, args, body, *, globals=None, locals=None,
         locals = {}
     return_annotation = ''
     if return_type is not MISSING:
-        locals['_return_type'] = return_type
-        return_annotation = '->_return_type'
+        locals['__dataclass_return_type__'] = return_type
+        return_annotation = '->__dataclass_return_type__'
     args = ','.join(args)
     body = '\n'.join(f'  {b}' for b in body)
 
     # Compute the text of the entire function.
     txt = f' def {name}({args}){return_annotation}:\n{body}'
 
+    # Free variables in exec are resolved in the global namespace.
+    # The global namespace we have is user-provided, so we can't modify it for
+    # our purposes. So we put the things we need into locals and introduce a
+    # scope to allow the function we're creating to close over them.
     local_vars = ', '.join(locals.keys())
     txt = f"def __create_fn__({local_vars}):\n{txt}\n return {name}"
     ns = {}
@@ -450,14 +490,14 @@ def _field_init(f, frozen, globals, self_name, slots):
     # Return the text of the line in the body of __init__ that will
     # initialize this field.
 
-    default_name = f'_dflt_{f.name}'
+    default_name = f'__dataclass_dflt_{f.name}__'
     if f.default_factory is not MISSING:
         if f.init:
             # This field has a default factory.  If a parameter is
             # given, use it.  If not, call the factory.
             globals[default_name] = f.default_factory
             value = (f'{default_name}() '
-                     f'if {f.name} is _HAS_DEFAULT_FACTORY '
+                     f'if {f.name} is __dataclass_HAS_DEFAULT_FACTORY__ '
                      f'else {f.name}')
         else:
             # This is a field that's not in the __init__ params, but
@@ -518,11 +558,11 @@ def _init_param(f):
     elif f.default is not MISSING:
         # There's a default, this will be the name that's used to look
         # it up.
-        default = f'=_dflt_{f.name}'
+        default = f'=__dataclass_dflt_{f.name}__'
     elif f.default_factory is not MISSING:
         # There's a factory function.  Set a marker.
-        default = '=_HAS_DEFAULT_FACTORY'
-    return f'{f.name}:_type_{f.name}{default}'
+        default = '=__dataclass_HAS_DEFAULT_FACTORY__'
+    return f'{f.name}:__dataclass_type_{f.name}__{default}'
 
 
 def _init_fn(fields, std_fields, kw_only_fields, frozen, has_post_init,
@@ -545,10 +585,9 @@ def _init_fn(fields, std_fields, kw_only_fields, frozen, has_post_init,
                 raise TypeError(f'non-default argument {f.name!r} '
                                 'follows default argument')
 
-    locals = {f'_type_{f.name}': f.type for f in fields}
+    locals = {f'__dataclass_type_{f.name}__': f.type for f in fields}
     locals.update({
-        'MISSING': MISSING,
-        '_HAS_DEFAULT_FACTORY': _HAS_DEFAULT_FACTORY,
+        '__dataclass_HAS_DEFAULT_FACTORY__': _HAS_DEFAULT_FACTORY,
         '__dataclass_builtins_object__': object,
     })
 
@@ -599,21 +638,19 @@ def _repr_fn(fields, globals):
 def _frozen_get_del_attr(cls, fields, globals):
     locals = {'cls': cls,
               'FrozenInstanceError': FrozenInstanceError}
+    condition = 'type(self) is cls'
     if fields:
-        fields_str = '(' + ','.join(repr(f.name) for f in fields) + ',)'
-    else:
-        # Special case for the zero-length tuple.
-        fields_str = '()'
+        condition += ' or name in {' + ', '.join(repr(f.name) for f in fields) + '}'
     return (_create_fn('__setattr__',
                       ('self', 'name', 'value'),
-                      (f'if type(self) is cls or name in {fields_str}:',
+                      (f'if {condition}:',
                         ' raise FrozenInstanceError(f"cannot assign to field {name!r}")',
                        f'super(cls, self).__setattr__(name, value)'),
                        locals=locals,
                        globals=globals),
             _create_fn('__delattr__',
                       ('self', 'name'),
-                      (f'if type(self) is cls or name in {fields_str}:',
+                      (f'if {condition}:',
                         ' raise FrozenInstanceError(f"cannot delete field {name!r}")',
                        f'super(cls, self).__delattr__(name)'),
                        locals=locals,
@@ -900,7 +937,9 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen,
         globals = {}
 
     setattr(cls, _PARAMS, _DataclassParams(init, repr, eq, order,
-                                           unsafe_hash, frozen))
+                                           unsafe_hash, frozen,
+                                           match_args, kw_only,
+                                           slots, weakref_slot))
 
     # Find our base classes in reverse MRO order, and exclude
     # ourselves.  In reversed order so that more derived classes
@@ -919,10 +958,7 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen,
             if getattr(b, _PARAMS).frozen:
                 any_frozen_base = True
 
-    # Annotations that are defined in this class (not in base
-    # classes).  If __annotations__ isn't present, then this class
-    # adds no new annotations.  We use this to compute fields that are
-    # added by this class.
+    # Annotations defined specifically in this class (not in base classes).
     #
     # Fields are found from cls_annotations, which is guaranteed to be
     # ordered.  Default values are from class attributes, if a field
@@ -931,7 +967,7 @@ def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen,
     # actual default value.  Pseudo-fields ClassVars and InitVars are
     # included, despite the fact that they're not real fields.  That's
     # dealt with later.
-    cls_annotations = cls.__dict__.get('__annotations__', {})
+    cls_annotations = inspect.get_annotations(cls)
 
     # Now find fields in our class.  While doing so, validate some
     # things, and set the default values (as class attributes) where
@@ -1277,7 +1313,7 @@ def asdict(obj, *, dict_factory=dict):
     If given, 'dict_factory' will be used instead of built-in dict.
     The function applies recursively to field values that are
     dataclass instances. This will also look into built-in containers:
-    tuples, lists, and dicts.
+    tuples, lists, and dicts. Other objects are copied with 'copy.deepcopy()'.
     """
     if not _is_dataclass_instance(obj):
         raise TypeError("asdict() should be called on dataclass instances")
@@ -1285,12 +1321,21 @@ def asdict(obj, *, dict_factory=dict):
 
 
 def _asdict_inner(obj, dict_factory):
-    if _is_dataclass_instance(obj):
-        result = []
-        for f in fields(obj):
-            value = _asdict_inner(getattr(obj, f.name), dict_factory)
-            result.append((f.name, value))
-        return dict_factory(result)
+    if type(obj) in _ATOMIC_TYPES:
+        return obj
+    elif _is_dataclass_instance(obj):
+        # fast path for the common case
+        if dict_factory is dict:
+            return {
+                f.name: _asdict_inner(getattr(obj, f.name), dict)
+                for f in fields(obj)
+            }
+        else:
+            result = []
+            for f in fields(obj):
+                value = _asdict_inner(getattr(obj, f.name), dict_factory)
+                result.append((f.name, value))
+            return dict_factory(result)
     elif isinstance(obj, tuple) and hasattr(obj, '_fields'):
         # obj is a namedtuple.  Recurse into it, but the returned
         # object is another namedtuple of the same type.  This is
@@ -1318,6 +1363,13 @@ def _asdict_inner(obj, dict_factory):
         # above).
         return type(obj)(_asdict_inner(v, dict_factory) for v in obj)
     elif isinstance(obj, dict):
+        if hasattr(type(obj), 'default_factory'):
+            # obj is a defaultdict, which has a different constructor from
+            # dict as it requires the default_factory as its first arg.
+            result = type(obj)(getattr(obj, 'default_factory'))
+            for k, v in obj.items():
+                result[_asdict_inner(k, dict_factory)] = _asdict_inner(v, dict_factory)
+            return result
         return type(obj)((_asdict_inner(k, dict_factory),
                           _asdict_inner(v, dict_factory))
                          for k, v in obj.items())
@@ -1341,7 +1393,7 @@ def astuple(obj, *, tuple_factory=tuple):
     If given, 'tuple_factory' will be used instead of built-in tuple.
     The function applies recursively to field values that are
     dataclass instances. This will also look into built-in containers:
-    tuples, lists, and dicts.
+    tuples, lists, and dicts. Other objects are copied with 'copy.deepcopy()'.
     """
 
     if not _is_dataclass_instance(obj):
@@ -1350,7 +1402,9 @@ def astuple(obj, *, tuple_factory=tuple):
 
 
 def _astuple_inner(obj, tuple_factory):
-    if _is_dataclass_instance(obj):
+    if type(obj) in _ATOMIC_TYPES:
+        return obj
+    elif _is_dataclass_instance(obj):
         result = []
         for f in fields(obj):
             value = _astuple_inner(getattr(obj, f.name), tuple_factory)
@@ -1370,7 +1424,15 @@ def _astuple_inner(obj, tuple_factory):
         # above).
         return type(obj)(_astuple_inner(v, tuple_factory) for v in obj)
     elif isinstance(obj, dict):
-        return type(obj)((_astuple_inner(k, tuple_factory), _astuple_inner(v, tuple_factory))
+        obj_type = type(obj)
+        if hasattr(obj_type, 'default_factory'):
+            # obj is a defaultdict, which has a different constructor from
+            # dict as it requires the default_factory as its first arg.
+            result = obj_type(getattr(obj, 'default_factory'))
+            for k, v in obj.items():
+                result[_astuple_inner(k, tuple_factory)] = _astuple_inner(v, tuple_factory)
+            return result
+        return obj_type((_astuple_inner(k, tuple_factory), _astuple_inner(v, tuple_factory))
                           for k, v in obj.items())
     else:
         return copy.deepcopy(obj)
@@ -1379,7 +1441,7 @@ def _astuple_inner(obj, tuple_factory):
 def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True,
                    repr=True, eq=True, order=False, unsafe_hash=False,
                    frozen=False, match_args=True, kw_only=False, slots=False,
-                   weakref_slot=False):
+                   weakref_slot=False, module=None):
     """Return a new dynamically created dataclass.
 
     The dataclass name will be 'cls_name'.  'fields' is an iterable
@@ -1399,8 +1461,11 @@ def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True,
 
     For the bases and namespace parameters, see the builtin type() function.
 
-    The parameters init, repr, eq, order, unsafe_hash, and frozen are passed to
-    dataclass().
+    The parameters init, repr, eq, order, unsafe_hash, frozen, match_args, kw_only,
+    slots, and weakref_slot are passed to dataclass().
+
+    If module parameter is defined, the '__module__' attribute of the dataclass is
+    set to that value.
     """
 
     if namespace is None:
@@ -1443,6 +1508,19 @@ def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True,
     # of generic dataclasses.
     cls = types.new_class(cls_name, bases, {}, exec_body_callback)
 
+    # For pickling to work, the __module__ variable needs to be set to the frame
+    # where the dataclass is created.
+    if module is None:
+        try:
+            module = sys._getframemodulename(1) or '__main__'
+        except AttributeError:
+            try:
+                module = sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                pass
+    if module is not None:
+        cls.__module__ = module
+
     # Apply the normal decorator.
     return dataclass(cls, init=init, repr=repr, eq=eq, order=order,
                      unsafe_hash=unsafe_hash, frozen=frozen,
diff --git a/contrib/tools/python3/src/Lib/datetime.py b/contrib/tools/python3/src/Lib/datetime.py
index 474b4e9ae5..a33d2d724c 100644
--- a/contrib/tools/python3/src/Lib/datetime.py
+++ b/contrib/tools/python3/src/Lib/datetime.py
@@ -1,2635 +1,9 @@
-"""Concrete date/time and related types.
-
-See http://www.iana.org/time-zones/repository/tz-link.html for
-time zone and DST data sources.
-"""
-
-__all__ = ("date", "datetime", "time", "timedelta", "timezone", "tzinfo",
-           "MINYEAR", "MAXYEAR", "UTC")
-
-
-import time as _time
-import math as _math
-import sys
-from operator import index as _index
-
-def _cmp(x, y):
-    return 0 if x == y else 1 if x > y else -1
-
-MINYEAR = 1
-MAXYEAR = 9999
-_MAXORDINAL = 3652059  # date.max.toordinal()
-
-# Utility functions, adapted from Python's Demo/classes/Dates.py, which
-# also assumes the current Gregorian calendar indefinitely extended in
-# both directions.  Difference:  Dates.py calls January 1 of year 0 day
-# number 1.  The code here calls January 1 of year 1 day number 1.  This is
-# to match the definition of the "proleptic Gregorian" calendar in Dershowitz
-# and Reingold's "Calendrical Calculations", where it's the base calendar
-# for all computations.  See the book for algorithms for converting between
-# proleptic Gregorian ordinals and many other calendar systems.
-
-# -1 is a placeholder for indexing purposes.
-_DAYS_IN_MONTH = [-1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
-
-_DAYS_BEFORE_MONTH = [-1]  # -1 is a placeholder for indexing purposes.
-dbm = 0
-for dim in _DAYS_IN_MONTH[1:]:
-    _DAYS_BEFORE_MONTH.append(dbm)
-    dbm += dim
-del dbm, dim
-
-def _is_leap(year):
-    "year -> 1 if leap year, else 0."
-    return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)
-
-def _days_before_year(year):
-    "year -> number of days before January 1st of year."
-    y = year - 1
-    return y*365 + y//4 - y//100 + y//400
-
-def _days_in_month(year, month):
-    "year, month -> number of days in that month in that year."
-    assert 1 <= month <= 12, month
-    if month == 2 and _is_leap(year):
-        return 29
-    return _DAYS_IN_MONTH[month]
-
-def _days_before_month(year, month):
-    "year, month -> number of days in year preceding first day of month."
-    assert 1 <= month <= 12, 'month must be in 1..12'
-    return _DAYS_BEFORE_MONTH[month] + (month > 2 and _is_leap(year))
-
-def _ymd2ord(year, month, day):
-    "year, month, day -> ordinal, considering 01-Jan-0001 as day 1."
-    assert 1 <= month <= 12, 'month must be in 1..12'
-    dim = _days_in_month(year, month)
-    assert 1 <= day <= dim, ('day must be in 1..%d' % dim)
-    return (_days_before_year(year) +
-            _days_before_month(year, month) +
-            day)
-
-_DI400Y = _days_before_year(401)    # number of days in 400 years
-_DI100Y = _days_before_year(101)    #    "    "   "   " 100   "
-_DI4Y   = _days_before_year(5)      #    "    "   "   "   4   "
-
-# A 4-year cycle has an extra leap day over what we'd get from pasting
-# together 4 single years.
-assert _DI4Y == 4 * 365 + 1
-
-# Similarly, a 400-year cycle has an extra leap day over what we'd get from
-# pasting together 4 100-year cycles.
-assert _DI400Y == 4 * _DI100Y + 1
-
-# OTOH, a 100-year cycle has one fewer leap day than we'd get from
-# pasting together 25 4-year cycles.
-assert _DI100Y == 25 * _DI4Y - 1
-
-def _ord2ymd(n):
-    "ordinal -> (year, month, day), considering 01-Jan-0001 as day 1."
-
-    # n is a 1-based index, starting at 1-Jan-1.  The pattern of leap years
-    # repeats exactly every 400 years.  The basic strategy is to find the
-    # closest 400-year boundary at or before n, then work with the offset
-    # from that boundary to n.  Life is much clearer if we subtract 1 from
-    # n first -- then the values of n at 400-year boundaries are exactly
-    # those divisible by _DI400Y:
-    #
-    #     D  M   Y            n              n-1
-    #     -- --- ----        ----------     ----------------
-    #     31 Dec -400        -_DI400Y       -_DI400Y -1
-    #      1 Jan -399         -_DI400Y +1   -_DI400Y      400-year boundary
-    #     ...
-    #     30 Dec  000        -1             -2
-    #     31 Dec  000         0             -1
-    #      1 Jan  001         1              0            400-year boundary
-    #      2 Jan  001         2              1
-    #      3 Jan  001         3              2
-    #     ...
-    #     31 Dec  400         _DI400Y        _DI400Y -1
-    #      1 Jan  401         _DI400Y +1     _DI400Y      400-year boundary
-    n -= 1
-    n400, n = divmod(n, _DI400Y)
-    year = n400 * 400 + 1   # ..., -399, 1, 401, ...
-
-    # Now n is the (non-negative) offset, in days, from January 1 of year, to
-    # the desired date.  Now compute how many 100-year cycles precede n.
-    # Note that it's possible for n100 to equal 4!  In that case 4 full
-    # 100-year cycles precede the desired day, which implies the desired
-    # day is December 31 at the end of a 400-year cycle.
-    n100, n = divmod(n, _DI100Y)
-
-    # Now compute how many 4-year cycles precede it.
-    n4, n = divmod(n, _DI4Y)
-
-    # And now how many single years.  Again n1 can be 4, and again meaning
-    # that the desired day is December 31 at the end of the 4-year cycle.
-    n1, n = divmod(n, 365)
-
-    year += n100 * 100 + n4 * 4 + n1
-    if n1 == 4 or n100 == 4:
-        assert n == 0
-        return year-1, 12, 31
-
-    # Now the year is correct, and n is the offset from January 1.  We find
-    # the month via an estimate that's either exact or one too large.
-    leapyear = n1 == 3 and (n4 != 24 or n100 == 3)
-    assert leapyear == _is_leap(year)
-    month = (n + 50) >> 5
-    preceding = _DAYS_BEFORE_MONTH[month] + (month > 2 and leapyear)
-    if preceding > n:  # estimate is too large
-        month -= 1
-        preceding -= _DAYS_IN_MONTH[month] + (month == 2 and leapyear)
-    n -= preceding
-    assert 0 <= n < _days_in_month(year, month)
-
-    # Now the year and month are correct, and n is the offset from the
-    # start of that month:  we're done!
-    return year, month, n+1
-
-# Month and day names.  For localized versions, see the calendar module.
-_MONTHNAMES = [None, "Jan", "Feb", "Mar", "Apr", "May", "Jun",
-                     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
-_DAYNAMES = [None, "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
-
-
-def _build_struct_time(y, m, d, hh, mm, ss, dstflag):
-    wday = (_ymd2ord(y, m, d) + 6) % 7
-    dnum = _days_before_month(y, m) + d
-    return _time.struct_time((y, m, d, hh, mm, ss, wday, dnum, dstflag))
-
-def _format_time(hh, mm, ss, us, timespec='auto'):
-    specs = {
-        'hours': '{:02d}',
-        'minutes': '{:02d}:{:02d}',
-        'seconds': '{:02d}:{:02d}:{:02d}',
-        'milliseconds': '{:02d}:{:02d}:{:02d}.{:03d}',
-        'microseconds': '{:02d}:{:02d}:{:02d}.{:06d}'
-    }
-
-    if timespec == 'auto':
-        # Skip trailing microseconds when us==0.
-        timespec = 'microseconds' if us else 'seconds'
-    elif timespec == 'milliseconds':
-        us //= 1000
-    try:
-        fmt = specs[timespec]
-    except KeyError:
-        raise ValueError('Unknown timespec value')
-    else:
-        return fmt.format(hh, mm, ss, us)
-
-def _format_offset(off):
-    s = ''
-    if off is not None:
-        if off.days < 0:
-            sign = "-"
-            off = -off
-        else:
-            sign = "+"
-        hh, mm = divmod(off, timedelta(hours=1))
-        mm, ss = divmod(mm, timedelta(minutes=1))
-        s += "%s%02d:%02d" % (sign, hh, mm)
-        if ss or ss.microseconds:
-            s += ":%02d" % ss.seconds
-
-            if ss.microseconds:
-                s += '.%06d' % ss.microseconds
-    return s
-
-# Correctly substitute for %z and %Z escapes in strftime formats.
-def _wrap_strftime(object, format, timetuple):
-    # Don't call utcoffset() or tzname() unless actually needed.
-    freplace = None  # the string to use for %f
-    zreplace = None  # the string to use for %z
-    Zreplace = None  # the string to use for %Z
-
-    # Scan format for %z and %Z escapes, replacing as needed.
-    newformat = []
-    push = newformat.append
-    i, n = 0, len(format)
-    while i < n:
-        ch = format[i]
-        i += 1
-        if ch == '%':
-            if i < n:
-                ch = format[i]
-                i += 1
-                if ch == 'f':
-                    if freplace is None:
-                        freplace = '%06d' % getattr(object,
-                                                    'microsecond', 0)
-                    newformat.append(freplace)
-                elif ch == 'z':
-                    if zreplace is None:
-                        zreplace = ""
-                        if hasattr(object, "utcoffset"):
-                            offset = object.utcoffset()
-                            if offset is not None:
-                                sign = '+'
-                                if offset.days < 0:
-                                    offset = -offset
-                                    sign = '-'
-                                h, rest = divmod(offset, timedelta(hours=1))
-                                m, rest = divmod(rest, timedelta(minutes=1))
-                                s = rest.seconds
-                                u = offset.microseconds
-                                if u:
-                                    zreplace = '%c%02d%02d%02d.%06d' % (sign, h, m, s, u)
-                                elif s:
-                                    zreplace = '%c%02d%02d%02d' % (sign, h, m, s)
-                                else:
-                                    zreplace = '%c%02d%02d' % (sign, h, m)
-                    assert '%' not in zreplace
-                    newformat.append(zreplace)
-                elif ch == 'Z':
-                    if Zreplace is None:
-                        Zreplace = ""
-                        if hasattr(object, "tzname"):
-                            s = object.tzname()
-                            if s is not None:
-                                # strftime is going to have at this: escape %
-                                Zreplace = s.replace('%', '%%')
-                    newformat.append(Zreplace)
-                else:
-                    push('%')
-                    push(ch)
-            else:
-                push('%')
-        else:
-            push(ch)
-    newformat = "".join(newformat)
-    return _time.strftime(newformat, timetuple)
-
-# Helpers for parsing the result of isoformat()
-def _is_ascii_digit(c):
-    return c in "0123456789"
-
-def _find_isoformat_datetime_separator(dtstr):
-    # See the comment in _datetimemodule.c:_find_isoformat_datetime_separator
-    len_dtstr = len(dtstr)
-    if len_dtstr == 7:
-        return 7
-
-    assert len_dtstr > 7
-    date_separator = "-"
-    week_indicator = "W"
-
-    if dtstr[4] == date_separator:
-        if dtstr[5] == week_indicator:
-            if len_dtstr < 8:
-                raise ValueError("Invalid ISO string")
-            if len_dtstr > 8 and dtstr[8] == date_separator:
-                if len_dtstr == 9:
-                    raise ValueError("Invalid ISO string")
-                if len_dtstr > 10 and _is_ascii_digit(dtstr[10]):
-                    # This is as far as we need to resolve the ambiguity for
-                    # the moment - if we have YYYY-Www-##, the separator is
-                    # either a hyphen at 8 or a number at 10.
-                    #
-                    # We'll assume it's a hyphen at 8 because it's way more
-                    # likely that someone will use a hyphen as a separator than
-                    # a number, but at this point it's really best effort
-                    # because this is an extension of the spec anyway.
-                    # TODO(pganssle): Document this
-                    return 8
-                return 10
-            else:
-                # YYYY-Www (8)
-                return 8
-        else:
-            # YYYY-MM-DD (10)
-            return 10
-    else:
-        if dtstr[4] == week_indicator:
-            # YYYYWww (7) or YYYYWwwd (8)
-            idx = 7
-            while idx < len_dtstr:
-                if not _is_ascii_digit(dtstr[idx]):
-                    break
-                idx += 1
-
-            if idx < 9:
-                return idx
-
-            if idx % 2 == 0:
-                # If the index of the last number is even, it's YYYYWwwd
-                return 7
-            else:
-                return 8
-        else:
-            # YYYYMMDD (8)
-            return 8
-
-
-def _parse_isoformat_date(dtstr):
-    # It is assumed that this is an ASCII-only string of lengths 7, 8 or 10,
-    # see the comment on Modules/_datetimemodule.c:_find_isoformat_datetime_separator
-    assert len(dtstr) in (7, 8, 10)
-    year = int(dtstr[0:4])
-    has_sep = dtstr[4] == '-'
-
-    pos = 4 + has_sep
-    if dtstr[pos:pos + 1] == "W":
-        # YYYY-?Www-?D?
-        pos += 1
-        weekno = int(dtstr[pos:pos + 2])
-        pos += 2
-
-        dayno = 1
-        if len(dtstr) > pos:
-            if (dtstr[pos:pos + 1] == '-') != has_sep:
-                raise ValueError("Inconsistent use of dash separator")
-
-            pos += has_sep
-
-            dayno = int(dtstr[pos:pos + 1])
-
-        return list(_isoweek_to_gregorian(year, weekno, dayno))
-    else:
-        month = int(dtstr[pos:pos + 2])
-        pos += 2
-        if (dtstr[pos:pos + 1] == "-") != has_sep:
-            raise ValueError("Inconsistent use of dash separator")
-
-        pos += has_sep
-        day = int(dtstr[pos:pos + 2])
-
-        return [year, month, day]
-
-
-_FRACTION_CORRECTION = [100000, 10000, 1000, 100, 10]
-
-
-def _parse_hh_mm_ss_ff(tstr):
-    # Parses things of the form HH[:?MM[:?SS[{.,}fff[fff]]]]
-    len_str = len(tstr)
-
-    time_comps = [0, 0, 0, 0]
-    pos = 0
-    for comp in range(0, 3):
-        if (len_str - pos) < 2:
-            raise ValueError("Incomplete time component")
-
-        time_comps[comp] = int(tstr[pos:pos+2])
-
-        pos += 2
-        next_char = tstr[pos:pos+1]
-
-        if comp == 0:
-            has_sep = next_char == ':'
-
-        if not next_char or comp >= 2:
-            break
-
-        if has_sep and next_char != ':':
-            raise ValueError("Invalid time separator: %c" % next_char)
-
-        pos += has_sep
-
-    if pos < len_str:
-        if tstr[pos] not in '.,':
-            raise ValueError("Invalid microsecond component")
-        else:
-            pos += 1
-
-            len_remainder = len_str - pos
-
-            if len_remainder >= 6:
-                to_parse = 6
-            else:
-                to_parse = len_remainder
-
-            time_comps[3] = int(tstr[pos:(pos+to_parse)])
-            if to_parse < 6:
-                time_comps[3] *= _FRACTION_CORRECTION[to_parse-1]
-            if (len_remainder > to_parse
-                    and not all(map(_is_ascii_digit, tstr[(pos+to_parse):]))):
-                raise ValueError("Non-digit values in unparsed fraction")
-
-    return time_comps
-
-def _parse_isoformat_time(tstr):
-    # Format supported is HH[:MM[:SS[.fff[fff]]]][+HH:MM[:SS[.ffffff]]]
-    len_str = len(tstr)
-    if len_str < 2:
-        raise ValueError("Isoformat time too short")
-
-    # This is equivalent to re.search('[+-Z]', tstr), but faster
-    tz_pos = (tstr.find('-') + 1 or tstr.find('+') + 1 or tstr.find('Z') + 1)
-    timestr = tstr[:tz_pos-1] if tz_pos > 0 else tstr
-
-    time_comps = _parse_hh_mm_ss_ff(timestr)
-
-    tzi = None
-    if tz_pos == len_str and tstr[-1] == 'Z':
-        tzi = timezone.utc
-    elif tz_pos > 0:
-        tzstr = tstr[tz_pos:]
-
-        # Valid time zone strings are:
-        # HH                  len: 2
-        # HHMM                len: 4
-        # HH:MM               len: 5
-        # HHMMSS              len: 6
-        # HHMMSS.f+           len: 7+
-        # HH:MM:SS            len: 8
-        # HH:MM:SS.f+         len: 10+
-
-        if len(tzstr) in (0, 1, 3):
-            raise ValueError("Malformed time zone string")
-
-        tz_comps = _parse_hh_mm_ss_ff(tzstr)
-
-        if all(x == 0 for x in tz_comps):
-            tzi = timezone.utc
-        else:
-            tzsign = -1 if tstr[tz_pos - 1] == '-' else 1
-
-            td = timedelta(hours=tz_comps[0], minutes=tz_comps[1],
-                           seconds=tz_comps[2], microseconds=tz_comps[3])
-
-            tzi = timezone(tzsign * td)
-
-    time_comps.append(tzi)
-
-    return time_comps
-
-# tuple[int, int, int] -> tuple[int, int, int] version of date.fromisocalendar
-def _isoweek_to_gregorian(year, week, day):
-    # Year is bounded this way because 9999-12-31 is (9999, 52, 5)
-    if not MINYEAR <= year <= MAXYEAR:
-        raise ValueError(f"Year is out of range: {year}")
-
-    if not 0 < week < 53:
-        out_of_range = True
-
-        if week == 53:
-            # ISO years have 53 weeks in them on years starting with a
-            # Thursday and leap years starting on a Wednesday
-            first_weekday = _ymd2ord(year, 1, 1) % 7
-            if (first_weekday == 4 or (first_weekday == 3 and
-                                       _is_leap(year))):
-                out_of_range = False
-
-        if out_of_range:
-            raise ValueError(f"Invalid week: {week}")
-
-    if not 0 < day < 8:
-        raise ValueError(f"Invalid weekday: {day} (range is [1, 7])")
-
-    # Now compute the offset from (Y, 1, 1) in days:
-    day_offset = (week - 1) * 7 + (day - 1)
-
-    # Calculate the ordinal day for monday, week 1
-    day_1 = _isoweek1monday(year)
-    ord_day = day_1 + day_offset
-
-    return _ord2ymd(ord_day)
-
-
-# Just raise TypeError if the arg isn't None or a string.
-def _check_tzname(name):
-    if name is not None and not isinstance(name, str):
-        raise TypeError("tzinfo.tzname() must return None or string, "
-                        "not '%s'" % type(name))
-
-# name is the offset-producing method, "utcoffset" or "dst".
-# offset is what it returned.
-# If offset isn't None or timedelta, raises TypeError.
-# If offset is None, returns None.
-# Else offset is checked for being in range.
-# If it is, its integer value is returned.  Else ValueError is raised.
-def _check_utc_offset(name, offset):
-    assert name in ("utcoffset", "dst")
-    if offset is None:
-        return
-    if not isinstance(offset, timedelta):
-        raise TypeError("tzinfo.%s() must return None "
-                        "or timedelta, not '%s'" % (name, type(offset)))
-    if not -timedelta(1) < offset < timedelta(1):
-        raise ValueError("%s()=%s, must be strictly between "
-                         "-timedelta(hours=24) and timedelta(hours=24)" %
-                         (name, offset))
-
-def _check_date_fields(year, month, day):
-    year = _index(year)
-    month = _index(month)
-    day = _index(day)
-    if not MINYEAR <= year <= MAXYEAR:
-        raise ValueError('year must be in %d..%d' % (MINYEAR, MAXYEAR), year)
-    if not 1 <= month <= 12:
-        raise ValueError('month must be in 1..12', month)
-    dim = _days_in_month(year, month)
-    if not 1 <= day <= dim:
-        raise ValueError('day must be in 1..%d' % dim, day)
-    return year, month, day
-
-def _check_time_fields(hour, minute, second, microsecond, fold):
-    hour = _index(hour)
-    minute = _index(minute)
-    second = _index(second)
-    microsecond = _index(microsecond)
-    if not 0 <= hour <= 23:
-        raise ValueError('hour must be in 0..23', hour)
-    if not 0 <= minute <= 59:
-        raise ValueError('minute must be in 0..59', minute)
-    if not 0 <= second <= 59:
-        raise ValueError('second must be in 0..59', second)
-    if not 0 <= microsecond <= 999999:
-        raise ValueError('microsecond must be in 0..999999', microsecond)
-    if fold not in (0, 1):
-        raise ValueError('fold must be either 0 or 1', fold)
-    return hour, minute, second, microsecond, fold
-
-def _check_tzinfo_arg(tz):
-    if tz is not None and not isinstance(tz, tzinfo):
-        raise TypeError("tzinfo argument must be None or of a tzinfo subclass")
-
-def _cmperror(x, y):
-    raise TypeError("can't compare '%s' to '%s'" % (
-                    type(x).__name__, type(y).__name__))
-
-def _divide_and_round(a, b):
-    """divide a by b and round result to the nearest integer
-
-    When the ratio is exactly half-way between two integers,
-    the even integer is returned.
-    """
-    # Based on the reference implementation for divmod_near
-    # in Objects/longobject.c.
-    q, r = divmod(a, b)
-    # round up if either r / b > 0.5, or r / b == 0.5 and q is odd.
-    # The expression r / b > 0.5 is equivalent to 2 * r > b if b is
-    # positive, 2 * r < b if b negative.
-    r *= 2
-    greater_than_half = r > b if b > 0 else r < b
-    if greater_than_half or r == b and q % 2 == 1:
-        q += 1
-
-    return q
-
-
-class timedelta:
-    """Represent the difference between two datetime objects.
-
-    Supported operators:
-
-    - add, subtract timedelta
-    - unary plus, minus, abs
-    - compare to timedelta
-    - multiply, divide by int
-
-    In addition, datetime supports subtraction of two datetime objects
-    returning a timedelta, and addition or subtraction of a datetime
-    and a timedelta giving a datetime.
-
-    Representation: (days, seconds, microseconds).  Why?  Because I
-    felt like it.
-    """
-    __slots__ = '_days', '_seconds', '_microseconds', '_hashcode'
-
-    def __new__(cls, days=0, seconds=0, microseconds=0,
-                milliseconds=0, minutes=0, hours=0, weeks=0):
-        # Doing this efficiently and accurately in C is going to be difficult
-        # and error-prone, due to ubiquitous overflow possibilities, and that
-        # C double doesn't have enough bits of precision to represent
-        # microseconds over 10K years faithfully.  The code here tries to make
-        # explicit where go-fast assumptions can be relied on, in order to
-        # guide the C implementation; it's way more convoluted than speed-
-        # ignoring auto-overflow-to-long idiomatic Python could be.
-
-        # XXX Check that all inputs are ints or floats.
-
-        # Final values, all integer.
-        # s and us fit in 32-bit signed ints; d isn't bounded.
-        d = s = us = 0
-
-        # Normalize everything to days, seconds, microseconds.
-        days += weeks*7
-        seconds += minutes*60 + hours*3600
-        microseconds += milliseconds*1000
-
-        # Get rid of all fractions, and normalize s and us.
-        # Take a deep breath <wink>.
-        if isinstance(days, float):
-            dayfrac, days = _math.modf(days)
-            daysecondsfrac, daysecondswhole = _math.modf(dayfrac * (24.*3600.))
-            assert daysecondswhole == int(daysecondswhole)  # can't overflow
-            s = int(daysecondswhole)
-            assert days == int(days)
-            d = int(days)
-        else:
-            daysecondsfrac = 0.0
-            d = days
-        assert isinstance(daysecondsfrac, float)
-        assert abs(daysecondsfrac) <= 1.0
-        assert isinstance(d, int)
-        assert abs(s) <= 24 * 3600
-        # days isn't referenced again before redefinition
-
-        if isinstance(seconds, float):
-            secondsfrac, seconds = _math.modf(seconds)
-            assert seconds == int(seconds)
-            seconds = int(seconds)
-            secondsfrac += daysecondsfrac
-            assert abs(secondsfrac) <= 2.0
-        else:
-            secondsfrac = daysecondsfrac
-        # daysecondsfrac isn't referenced again
-        assert isinstance(secondsfrac, float)
-        assert abs(secondsfrac) <= 2.0
-
-        assert isinstance(seconds, int)
-        days, seconds = divmod(seconds, 24*3600)
-        d += days
-        s += int(seconds)    # can't overflow
-        assert isinstance(s, int)
-        assert abs(s) <= 2 * 24 * 3600
-        # seconds isn't referenced again before redefinition
-
-        usdouble = secondsfrac * 1e6
-        assert abs(usdouble) < 2.1e6    # exact value not critical
-        # secondsfrac isn't referenced again
-
-        if isinstance(microseconds, float):
-            microseconds = round(microseconds + usdouble)
-            seconds, microseconds = divmod(microseconds, 1000000)
-            days, seconds = divmod(seconds, 24*3600)
-            d += days
-            s += seconds
-        else:
-            microseconds = int(microseconds)
-            seconds, microseconds = divmod(microseconds, 1000000)
-            days, seconds = divmod(seconds, 24*3600)
-            d += days
-            s += seconds
-            microseconds = round(microseconds + usdouble)
-        assert isinstance(s, int)
-        assert isinstance(microseconds, int)
-        assert abs(s) <= 3 * 24 * 3600
-        assert abs(microseconds) < 3.1e6
-
-        # Just a little bit of carrying possible for microseconds and seconds.
-        seconds, us = divmod(microseconds, 1000000)
-        s += seconds
-        days, s = divmod(s, 24*3600)
-        d += days
-
-        assert isinstance(d, int)
-        assert isinstance(s, int) and 0 <= s < 24*3600
-        assert isinstance(us, int) and 0 <= us < 1000000
-
-        if abs(d) > 999999999:
-            raise OverflowError("timedelta # of days is too large: %d" % d)
-
-        self = object.__new__(cls)
-        self._days = d
-        self._seconds = s
-        self._microseconds = us
-        self._hashcode = -1
-        return self
-
-    def __repr__(self):
-        args = []
-        if self._days:
-            args.append("days=%d" % self._days)
-        if self._seconds:
-            args.append("seconds=%d" % self._seconds)
-        if self._microseconds:
-            args.append("microseconds=%d" % self._microseconds)
-        if not args:
-            args.append('0')
-        return "%s.%s(%s)" % (self.__class__.__module__,
-                              self.__class__.__qualname__,
-                              ', '.join(args))
-
-    def __str__(self):
-        mm, ss = divmod(self._seconds, 60)
-        hh, mm = divmod(mm, 60)
-        s = "%d:%02d:%02d" % (hh, mm, ss)
-        if self._days:
-            def plural(n):
-                return n, abs(n) != 1 and "s" or ""
-            s = ("%d day%s, " % plural(self._days)) + s
-        if self._microseconds:
-            s = s + ".%06d" % self._microseconds
-        return s
-
-    def total_seconds(self):
-        """Total seconds in the duration."""
-        return ((self.days * 86400 + self.seconds) * 10**6 +
-                self.microseconds) / 10**6
-
-    # Read-only field accessors
-    @property
-    def days(self):
-        """days"""
-        return self._days
-
-    @property
-    def seconds(self):
-        """seconds"""
-        return self._seconds
-
-    @property
-    def microseconds(self):
-        """microseconds"""
-        return self._microseconds
-
-    def __add__(self, other):
-        if isinstance(other, timedelta):
-            # for CPython compatibility, we cannot use
-            # our __class__ here, but need a real timedelta
-            return timedelta(self._days + other._days,
-                             self._seconds + other._seconds,
-                             self._microseconds + other._microseconds)
-        return NotImplemented
-
-    __radd__ = __add__
-
-    def __sub__(self, other):
-        if isinstance(other, timedelta):
-            # for CPython compatibility, we cannot use
-            # our __class__ here, but need a real timedelta
-            return timedelta(self._days - other._days,
-                             self._seconds - other._seconds,
-                             self._microseconds - other._microseconds)
-        return NotImplemented
-
-    def __rsub__(self, other):
-        if isinstance(other, timedelta):
-            return -self + other
-        return NotImplemented
-
-    def __neg__(self):
-        # for CPython compatibility, we cannot use
-        # our __class__ here, but need a real timedelta
-        return timedelta(-self._days,
-                         -self._seconds,
-                         -self._microseconds)
-
-    def __pos__(self):
-        return self
-
-    def __abs__(self):
-        if self._days < 0:
-            return -self
-        else:
-            return self
-
-    def __mul__(self, other):
-        if isinstance(other, int):
-            # for CPython compatibility, we cannot use
-            # our __class__ here, but need a real timedelta
-            return timedelta(self._days * other,
-                             self._seconds * other,
-                             self._microseconds * other)
-        if isinstance(other, float):
-            usec = self._to_microseconds()
-            a, b = other.as_integer_ratio()
-            return timedelta(0, 0, _divide_and_round(usec * a, b))
-        return NotImplemented
-
-    __rmul__ = __mul__
-
-    def _to_microseconds(self):
-        return ((self._days * (24*3600) + self._seconds) * 1000000 +
-                self._microseconds)
-
-    def __floordiv__(self, other):
-        if not isinstance(other, (int, timedelta)):
-            return NotImplemented
-        usec = self._to_microseconds()
-        if isinstance(other, timedelta):
-            return usec // other._to_microseconds()
-        if isinstance(other, int):
-            return timedelta(0, 0, usec // other)
-
-    def __truediv__(self, other):
-        if not isinstance(other, (int, float, timedelta)):
-            return NotImplemented
-        usec = self._to_microseconds()
-        if isinstance(other, timedelta):
-            return usec / other._to_microseconds()
-        if isinstance(other, int):
-            return timedelta(0, 0, _divide_and_round(usec, other))
-        if isinstance(other, float):
-            a, b = other.as_integer_ratio()
-            return timedelta(0, 0, _divide_and_round(b * usec, a))
-
-    def __mod__(self, other):
-        if isinstance(other, timedelta):
-            r = self._to_microseconds() % other._to_microseconds()
-            return timedelta(0, 0, r)
-        return NotImplemented
-
-    def __divmod__(self, other):
-        if isinstance(other, timedelta):
-            q, r = divmod(self._to_microseconds(),
-                          other._to_microseconds())
-            return q, timedelta(0, 0, r)
-        return NotImplemented
-
-    # Comparisons of timedelta objects with other.
-
-    def __eq__(self, other):
-        if isinstance(other, timedelta):
-            return self._cmp(other) == 0
-        else:
-            return NotImplemented
-
-    def __le__(self, other):
-        if isinstance(other, timedelta):
-            return self._cmp(other) <= 0
-        else:
-            return NotImplemented
-
-    def __lt__(self, other):
-        if isinstance(other, timedelta):
-            return self._cmp(other) < 0
-        else:
-            return NotImplemented
-
-    def __ge__(self, other):
-        if isinstance(other, timedelta):
-            return self._cmp(other) >= 0
-        else:
-            return NotImplemented
-
-    def __gt__(self, other):
-        if isinstance(other, timedelta):
-            return self._cmp(other) > 0
-        else:
-            return NotImplemented
-
-    def _cmp(self, other):
-        assert isinstance(other, timedelta)
-        return _cmp(self._getstate(), other._getstate())
-
-    def __hash__(self):
-        if self._hashcode == -1:
-            self._hashcode = hash(self._getstate())
-        return self._hashcode
-
-    def __bool__(self):
-        return (self._days != 0 or
-                self._seconds != 0 or
-                self._microseconds != 0)
-
-    # Pickle support.
-
-    def _getstate(self):
-        return (self._days, self._seconds, self._microseconds)
-
-    def __reduce__(self):
-        return (self.__class__, self._getstate())
-
-timedelta.min = timedelta(-999999999)
-timedelta.max = timedelta(days=999999999, hours=23, minutes=59, seconds=59,
-                          microseconds=999999)
-timedelta.resolution = timedelta(microseconds=1)
-
-class date:
-    """Concrete date type.
-
-    Constructors:
-
-    __new__()
-    fromtimestamp()
-    today()
-    fromordinal()
-
-    Operators:
-
-    __repr__, __str__
-    __eq__, __le__, __lt__, __ge__, __gt__, __hash__
-    __add__, __radd__, __sub__ (add/radd only with timedelta arg)
-
-    Methods:
-
-    timetuple()
-    toordinal()
-    weekday()
-    isoweekday(), isocalendar(), isoformat()
-    ctime()
-    strftime()
-
-    Properties (readonly):
-    year, month, day
-    """
-    __slots__ = '_year', '_month', '_day', '_hashcode'
-
-    def __new__(cls, year, month=None, day=None):
-        """Constructor.
-
-        Arguments:
-
-        year, month, day (required, base 1)
-        """
-        if (month is None and
-            isinstance(year, (bytes, str)) and len(year) == 4 and
-            1 <= ord(year[2:3]) <= 12):
-            # Pickle support
-            if isinstance(year, str):
-                try:
-                    year = year.encode('latin1')
-                except UnicodeEncodeError:
-                    # More informative error message.
-                    raise ValueError(
-                        "Failed to encode latin1 string when unpickling "
-                        "a date object. "
-                        "pickle.load(data, encoding='latin1') is assumed.")
-            self = object.__new__(cls)
-            self.__setstate(year)
-            self._hashcode = -1
-            return self
-        year, month, day = _check_date_fields(year, month, day)
-        self = object.__new__(cls)
-        self._year = year
-        self._month = month
-        self._day = day
-        self._hashcode = -1
-        return self
-
-    # Additional constructors
-
-    @classmethod
-    def fromtimestamp(cls, t):
-        "Construct a date from a POSIX timestamp (like time.time())."
-        y, m, d, hh, mm, ss, weekday, jday, dst = _time.localtime(t)
-        return cls(y, m, d)
-
-    @classmethod
-    def today(cls):
-        "Construct a date from time.time()."
-        t = _time.time()
-        return cls.fromtimestamp(t)
-
-    @classmethod
-    def fromordinal(cls, n):
-        """Construct a date from a proleptic Gregorian ordinal.
-
-        January 1 of year 1 is day 1.  Only the year, month and day are
-        non-zero in the result.
-        """
-        y, m, d = _ord2ymd(n)
-        return cls(y, m, d)
-
-    @classmethod
-    def fromisoformat(cls, date_string):
-        """Construct a date from a string in ISO 8601 format."""
-        if not isinstance(date_string, str):
-            raise TypeError('fromisoformat: argument must be str')
-
-        if len(date_string) not in (7, 8, 10):
-            raise ValueError(f'Invalid isoformat string: {date_string!r}')
-
-        try:
-            return cls(*_parse_isoformat_date(date_string))
-        except Exception:
-            raise ValueError(f'Invalid isoformat string: {date_string!r}')
-
-    @classmethod
-    def fromisocalendar(cls, year, week, day):
-        """Construct a date from the ISO year, week number and weekday.
-
-        This is the inverse of the date.isocalendar() function"""
-        return cls(*_isoweek_to_gregorian(year, week, day))
-
-    # Conversions to string
-
-    def __repr__(self):
-        """Convert to formal string, for repr().
-
-        >>> d = date(2010, 1, 1)
-        >>> repr(d)
-        'datetime.date(2010, 1, 1)'
-        """
-        return "%s.%s(%d, %d, %d)" % (self.__class__.__module__,
-                                      self.__class__.__qualname__,
-                                      self._year,
-                                      self._month,
-                                      self._day)
-    # XXX These shouldn't depend on time.localtime(), because that
-    # clips the usable dates to [1970 .. 2038).  At least ctime() is
-    # easily done without using strftime() -- that's better too because
-    # strftime("%c", ...) is locale specific.
-
-
-    def ctime(self):
-        "Return ctime() style string."
-        weekday = self.toordinal() % 7 or 7
-        return "%s %s %2d 00:00:00 %04d" % (
-            _DAYNAMES[weekday],
-            _MONTHNAMES[self._month],
-            self._day, self._year)
-
-    def strftime(self, fmt):
-        """
-        Format using strftime().
-
-        Example: "%d/%m/%Y, %H:%M:%S"
-        """
-        return _wrap_strftime(self, fmt, self.timetuple())
-
-    def __format__(self, fmt):
-        if not isinstance(fmt, str):
-            raise TypeError("must be str, not %s" % type(fmt).__name__)
-        if len(fmt) != 0:
-            return self.strftime(fmt)
-        return str(self)
-
-    def isoformat(self):
-        """Return the date formatted according to ISO.
-
-        This is 'YYYY-MM-DD'.
-
-        References:
-        - http://www.w3.org/TR/NOTE-datetime
-        - http://www.cl.cam.ac.uk/~mgk25/iso-time.html
-        """
-        return "%04d-%02d-%02d" % (self._year, self._month, self._day)
-
-    __str__ = isoformat
-
-    # Read-only field accessors
-    @property
-    def year(self):
-        """year (1-9999)"""
-        return self._year
-
-    @property
-    def month(self):
-        """month (1-12)"""
-        return self._month
-
-    @property
-    def day(self):
-        """day (1-31)"""
-        return self._day
-
-    # Standard conversions, __eq__, __le__, __lt__, __ge__, __gt__,
-    # __hash__ (and helpers)
-
-    def timetuple(self):
-        "Return local time tuple compatible with time.localtime()."
-        return _build_struct_time(self._year, self._month, self._day,
-                                  0, 0, 0, -1)
-
-    def toordinal(self):
-        """Return proleptic Gregorian ordinal for the year, month and day.
-
-        January 1 of year 1 is day 1.  Only the year, month and day values
-        contribute to the result.
-        """
-        return _ymd2ord(self._year, self._month, self._day)
-
-    def replace(self, year=None, month=None, day=None):
-        """Return a new date with new values for the specified fields."""
-        if year is None:
-            year = self._year
-        if month is None:
-            month = self._month
-        if day is None:
-            day = self._day
-        return type(self)(year, month, day)
-
-    # Comparisons of date objects with other.
-
-    def __eq__(self, other):
-        if isinstance(other, date):
-            return self._cmp(other) == 0
-        return NotImplemented
-
-    def __le__(self, other):
-        if isinstance(other, date):
-            return self._cmp(other) <= 0
-        return NotImplemented
-
-    def __lt__(self, other):
-        if isinstance(other, date):
-            return self._cmp(other) < 0
-        return NotImplemented
-
-    def __ge__(self, other):
-        if isinstance(other, date):
-            return self._cmp(other) >= 0
-        return NotImplemented
-
-    def __gt__(self, other):
-        if isinstance(other, date):
-            return self._cmp(other) > 0
-        return NotImplemented
-
-    def _cmp(self, other):
-        assert isinstance(other, date)
-        y, m, d = self._year, self._month, self._day
-        y2, m2, d2 = other._year, other._month, other._day
-        return _cmp((y, m, d), (y2, m2, d2))
-
-    def __hash__(self):
-        "Hash."
-        if self._hashcode == -1:
-            self._hashcode = hash(self._getstate())
-        return self._hashcode
-
-    # Computations
-
-    def __add__(self, other):
-        "Add a date to a timedelta."
-        if isinstance(other, timedelta):
-            o = self.toordinal() + other.days
-            if 0 < o <= _MAXORDINAL:
-                return type(self).fromordinal(o)
-            raise OverflowError("result out of range")
-        return NotImplemented
-
-    __radd__ = __add__
-
-    def __sub__(self, other):
-        """Subtract two dates, or a date and a timedelta."""
-        if isinstance(other, timedelta):
-            return self + timedelta(-other.days)
-        if isinstance(other, date):
-            days1 = self.toordinal()
-            days2 = other.toordinal()
-            return timedelta(days1 - days2)
-        return NotImplemented
-
-    def weekday(self):
-        "Return day of the week, where Monday == 0 ... Sunday == 6."
-        return (self.toordinal() + 6) % 7
-
-    # Day-of-the-week and week-of-the-year, according to ISO
-
-    def isoweekday(self):
-        "Return day of the week, where Monday == 1 ... Sunday == 7."
-        # 1-Jan-0001 is a Monday
-        return self.toordinal() % 7 or 7
-
-    def isocalendar(self):
-        """Return a named tuple containing ISO year, week number, and weekday.
-
-        The first ISO week of the year is the (Mon-Sun) week
-        containing the year's first Thursday; everything else derives
-        from that.
-
-        The first week is 1; Monday is 1 ... Sunday is 7.
-
-        ISO calendar algorithm taken from
-        http://www.phys.uu.nl/~vgent/calendar/isocalendar.htm
-        (used with permission)
-        """
-        year = self._year
-        week1monday = _isoweek1monday(year)
-        today = _ymd2ord(self._year, self._month, self._day)
-        # Internally, week and day have origin 0
-        week, day = divmod(today - week1monday, 7)
-        if week < 0:
-            year -= 1
-            week1monday = _isoweek1monday(year)
-            week, day = divmod(today - week1monday, 7)
-        elif week >= 52:
-            if today >= _isoweek1monday(year+1):
-                year += 1
-                week = 0
-        return _IsoCalendarDate(year, week+1, day+1)
-
-    # Pickle support.
-
-    def _getstate(self):
-        yhi, ylo = divmod(self._year, 256)
-        return bytes([yhi, ylo, self._month, self._day]),
-
-    def __setstate(self, string):
-        yhi, ylo, self._month, self._day = string
-        self._year = yhi * 256 + ylo
-
-    def __reduce__(self):
-        return (self.__class__, self._getstate())
-
-_date_class = date  # so functions w/ args named "date" can get at the class
-
-date.min = date(1, 1, 1)
-date.max = date(9999, 12, 31)
-date.resolution = timedelta(days=1)
-
-
-class tzinfo:
-    """Abstract base class for time zone info classes.
-
-    Subclasses must override the tzname(), utcoffset() and dst() methods.
-    """
-    __slots__ = ()
-
-    def tzname(self, dt):
-        "datetime -> string name of time zone."
-        raise NotImplementedError("tzinfo subclass must override tzname()")
-
-    def utcoffset(self, dt):
-        "datetime -> timedelta, positive for east of UTC, negative for west of UTC"
-        raise NotImplementedError("tzinfo subclass must override utcoffset()")
-
-    def dst(self, dt):
-        """datetime -> DST offset as timedelta, positive for east of UTC.
-
-        Return 0 if DST not in effect.  utcoffset() must include the DST
-        offset.
-        """
-        raise NotImplementedError("tzinfo subclass must override dst()")
-
-    def fromutc(self, dt):
-        "datetime in UTC -> datetime in local time."
-
-        if not isinstance(dt, datetime):
-            raise TypeError("fromutc() requires a datetime argument")
-        if dt.tzinfo is not self:
-            raise ValueError("dt.tzinfo is not self")
-
-        dtoff = dt.utcoffset()
-        if dtoff is None:
-            raise ValueError("fromutc() requires a non-None utcoffset() "
-                             "result")
-
-        # See the long comment block at the end of this file for an
-        # explanation of this algorithm.
-        dtdst = dt.dst()
-        if dtdst is None:
-            raise ValueError("fromutc() requires a non-None dst() result")
-        delta = dtoff - dtdst
-        if delta:
-            dt += delta
-            dtdst = dt.dst()
-            if dtdst is None:
-                raise ValueError("fromutc(): dt.dst gave inconsistent "
-                                 "results; cannot convert")
-        return dt + dtdst
-
-    # Pickle support.
-
-    def __reduce__(self):
-        getinitargs = getattr(self, "__getinitargs__", None)
-        if getinitargs:
-            args = getinitargs()
-        else:
-            args = ()
-        return (self.__class__, args, self.__getstate__())
-
-
-class IsoCalendarDate(tuple):
-
-    def __new__(cls, year, week, weekday, /):
-        return super().__new__(cls, (year, week, weekday))
-
-    @property
-    def year(self):
-        return self[0]
-
-    @property
-    def week(self):
-        return self[1]
-
-    @property
-    def weekday(self):
-        return self[2]
-
-    def __reduce__(self):
-        # This code is intended to pickle the object without making the
-        # class public. See https://bugs.python.org/msg352381
-        return (tuple, (tuple(self),))
-
-    def __repr__(self):
-        return (f'{self.__class__.__name__}'
-                f'(year={self[0]}, week={self[1]}, weekday={self[2]})')
-
-
-_IsoCalendarDate = IsoCalendarDate
-del IsoCalendarDate
-_tzinfo_class = tzinfo
-
-class time:
-    """Time with time zone.
-
-    Constructors:
-
-    __new__()
-
-    Operators:
-
-    __repr__, __str__
-    __eq__, __le__, __lt__, __ge__, __gt__, __hash__
-
-    Methods:
-
-    strftime()
-    isoformat()
-    utcoffset()
-    tzname()
-    dst()
-
-    Properties (readonly):
-    hour, minute, second, microsecond, tzinfo, fold
-    """
-    __slots__ = '_hour', '_minute', '_second', '_microsecond', '_tzinfo', '_hashcode', '_fold'
-
-    def __new__(cls, hour=0, minute=0, second=0, microsecond=0, tzinfo=None, *, fold=0):
-        """Constructor.
-
-        Arguments:
-
-        hour, minute (required)
-        second, microsecond (default to zero)
-        tzinfo (default to None)
-        fold (keyword only, default to zero)
-        """
-        if (isinstance(hour, (bytes, str)) and len(hour) == 6 and
-            ord(hour[0:1])&0x7F < 24):
-            # Pickle support
-            if isinstance(hour, str):
-                try:
-                    hour = hour.encode('latin1')
-                except UnicodeEncodeError:
-                    # More informative error message.
-                    raise ValueError(
-                        "Failed to encode latin1 string when unpickling "
-                        "a time object. "
-                        "pickle.load(data, encoding='latin1') is assumed.")
-            self = object.__new__(cls)
-            self.__setstate(hour, minute or None)
-            self._hashcode = -1
-            return self
-        hour, minute, second, microsecond, fold = _check_time_fields(
-            hour, minute, second, microsecond, fold)
-        _check_tzinfo_arg(tzinfo)
-        self = object.__new__(cls)
-        self._hour = hour
-        self._minute = minute
-        self._second = second
-        self._microsecond = microsecond
-        self._tzinfo = tzinfo
-        self._hashcode = -1
-        self._fold = fold
-        return self
-
-    # Read-only field accessors
-    @property
-    def hour(self):
-        """hour (0-23)"""
-        return self._hour
-
-    @property
-    def minute(self):
-        """minute (0-59)"""
-        return self._minute
-
-    @property
-    def second(self):
-        """second (0-59)"""
-        return self._second
-
-    @property
-    def microsecond(self):
-        """microsecond (0-999999)"""
-        return self._microsecond
-
-    @property
-    def tzinfo(self):
-        """timezone info object"""
-        return self._tzinfo
-
-    @property
-    def fold(self):
-        return self._fold
-
-    # Standard conversions, __hash__ (and helpers)
-
-    # Comparisons of time objects with other.
-
-    def __eq__(self, other):
-        if isinstance(other, time):
-            return self._cmp(other, allow_mixed=True) == 0
-        else:
-            return NotImplemented
-
-    def __le__(self, other):
-        if isinstance(other, time):
-            return self._cmp(other) <= 0
-        else:
-            return NotImplemented
-
-    def __lt__(self, other):
-        if isinstance(other, time):
-            return self._cmp(other) < 0
-        else:
-            return NotImplemented
-
-    def __ge__(self, other):
-        if isinstance(other, time):
-            return self._cmp(other) >= 0
-        else:
-            return NotImplemented
-
-    def __gt__(self, other):
-        if isinstance(other, time):
-            return self._cmp(other) > 0
-        else:
-            return NotImplemented
-
-    def _cmp(self, other, allow_mixed=False):
-        assert isinstance(other, time)
-        mytz = self._tzinfo
-        ottz = other._tzinfo
-        myoff = otoff = None
-
-        if mytz is ottz:
-            base_compare = True
-        else:
-            myoff = self.utcoffset()
-            otoff = other.utcoffset()
-            base_compare = myoff == otoff
-
-        if base_compare:
-            return _cmp((self._hour, self._minute, self._second,
-                         self._microsecond),
-                        (other._hour, other._minute, other._second,
-                         other._microsecond))
-        if myoff is None or otoff is None:
-            if allow_mixed:
-                return 2 # arbitrary non-zero value
-            else:
-                raise TypeError("cannot compare naive and aware times")
-        myhhmm = self._hour * 60 + self._minute - myoff//timedelta(minutes=1)
-        othhmm = other._hour * 60 + other._minute - otoff//timedelta(minutes=1)
-        return _cmp((myhhmm, self._second, self._microsecond),
-                    (othhmm, other._second, other._microsecond))
-
-    def __hash__(self):
-        """Hash."""
-        if self._hashcode == -1:
-            if self.fold:
-                t = self.replace(fold=0)
-            else:
-                t = self
-            tzoff = t.utcoffset()
-            if not tzoff:  # zero or None
-                self._hashcode = hash(t._getstate()[0])
-            else:
-                h, m = divmod(timedelta(hours=self.hour, minutes=self.minute) - tzoff,
-                              timedelta(hours=1))
-                assert not m % timedelta(minutes=1), "whole minute"
-                m //= timedelta(minutes=1)
-                if 0 <= h < 24:
-                    self._hashcode = hash(time(h, m, self.second, self.microsecond))
-                else:
-                    self._hashcode = hash((h, m, self.second, self.microsecond))
-        return self._hashcode
-
-    # Conversion to string
-
-    def _tzstr(self):
-        """Return formatted timezone offset (+xx:xx) or an empty string."""
-        off = self.utcoffset()
-        return _format_offset(off)
-
-    def __repr__(self):
-        """Convert to formal string, for repr()."""
-        if self._microsecond != 0:
-            s = ", %d, %d" % (self._second, self._microsecond)
-        elif self._second != 0:
-            s = ", %d" % self._second
-        else:
-            s = ""
-        s= "%s.%s(%d, %d%s)" % (self.__class__.__module__,
-                                self.__class__.__qualname__,
-                                self._hour, self._minute, s)
-        if self._tzinfo is not None:
-            assert s[-1:] == ")"
-            s = s[:-1] + ", tzinfo=%r" % self._tzinfo + ")"
-        if self._fold:
-            assert s[-1:] == ")"
-            s = s[:-1] + ", fold=1)"
-        return s
-
-    def isoformat(self, timespec='auto'):
-        """Return the time formatted according to ISO.
-
-        The full format is 'HH:MM:SS.mmmmmm+zz:zz'. By default, the fractional
-        part is omitted if self.microsecond == 0.
-
-        The optional argument timespec specifies the number of additional
-        terms of the time to include. Valid options are 'auto', 'hours',
-        'minutes', 'seconds', 'milliseconds' and 'microseconds'.
-        """
-        s = _format_time(self._hour, self._minute, self._second,
-                          self._microsecond, timespec)
-        tz = self._tzstr()
-        if tz:
-            s += tz
-        return s
-
-    __str__ = isoformat
-
-    @classmethod
-    def fromisoformat(cls, time_string):
-        """Construct a time from a string in one of the ISO 8601 formats."""
-        if not isinstance(time_string, str):
-            raise TypeError('fromisoformat: argument must be str')
-
-        # The spec actually requires that time-only ISO 8601 strings start with
-        # T, but the extended format allows this to be omitted as long as there
-        # is no ambiguity with date strings.
-        time_string = time_string.removeprefix('T')
-
-        try:
-            return cls(*_parse_isoformat_time(time_string))
-        except Exception:
-            raise ValueError(f'Invalid isoformat string: {time_string!r}')
-
-
-    def strftime(self, fmt):
-        """Format using strftime().  The date part of the timestamp passed
-        to underlying strftime should not be used.
-        """
-        # The year must be >= 1000 else Python's strftime implementation
-        # can raise a bogus exception.
-        timetuple = (1900, 1, 1,
-                     self._hour, self._minute, self._second,
-                     0, 1, -1)
-        return _wrap_strftime(self, fmt, timetuple)
-
-    def __format__(self, fmt):
-        if not isinstance(fmt, str):
-            raise TypeError("must be str, not %s" % type(fmt).__name__)
-        if len(fmt) != 0:
-            return self.strftime(fmt)
-        return str(self)
-
-    # Timezone functions
-
-    def utcoffset(self):
-        """Return the timezone offset as timedelta, positive east of UTC
-         (negative west of UTC)."""
-        if self._tzinfo is None:
-            return None
-        offset = self._tzinfo.utcoffset(None)
-        _check_utc_offset("utcoffset", offset)
-        return offset
-
-    def tzname(self):
-        """Return the timezone name.
-
-        Note that the name is 100% informational -- there's no requirement that
-        it mean anything in particular. For example, "GMT", "UTC", "-500",
-        "-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.
-        """
-        if self._tzinfo is None:
-            return None
-        name = self._tzinfo.tzname(None)
-        _check_tzname(name)
-        return name
-
-    def dst(self):
-        """Return 0 if DST is not in effect, or the DST offset (as timedelta
-        positive eastward) if DST is in effect.
-
-        This is purely informational; the DST offset has already been added to
-        the UTC offset returned by utcoffset() if applicable, so there's no
-        need to consult dst() unless you're interested in displaying the DST
-        info.
-        """
-        if self._tzinfo is None:
-            return None
-        offset = self._tzinfo.dst(None)
-        _check_utc_offset("dst", offset)
-        return offset
-
-    def replace(self, hour=None, minute=None, second=None, microsecond=None,
-                tzinfo=True, *, fold=None):
-        """Return a new time with new values for the specified fields."""
-        if hour is None:
-            hour = self.hour
-        if minute is None:
-            minute = self.minute
-        if second is None:
-            second = self.second
-        if microsecond is None:
-            microsecond = self.microsecond
-        if tzinfo is True:
-            tzinfo = self.tzinfo
-        if fold is None:
-            fold = self._fold
-        return type(self)(hour, minute, second, microsecond, tzinfo, fold=fold)
-
-    # Pickle support.
-
-    def _getstate(self, protocol=3):
-        us2, us3 = divmod(self._microsecond, 256)
-        us1, us2 = divmod(us2, 256)
-        h = self._hour
-        if self._fold and protocol > 3:
-            h += 128
-        basestate = bytes([h, self._minute, self._second,
-                           us1, us2, us3])
-        if self._tzinfo is None:
-            return (basestate,)
-        else:
-            return (basestate, self._tzinfo)
-
-    def __setstate(self, string, tzinfo):
-        if tzinfo is not None and not isinstance(tzinfo, _tzinfo_class):
-            raise TypeError("bad tzinfo state arg")
-        h, self._minute, self._second, us1, us2, us3 = string
-        if h > 127:
-            self._fold = 1
-            self._hour = h - 128
-        else:
-            self._fold = 0
-            self._hour = h
-        self._microsecond = (((us1 << 8) | us2) << 8) | us3
-        self._tzinfo = tzinfo
-
-    def __reduce_ex__(self, protocol):
-        return (self.__class__, self._getstate(protocol))
-
-    def __reduce__(self):
-        return self.__reduce_ex__(2)
-
-_time_class = time  # so functions w/ args named "time" can get at the class
-
-time.min = time(0, 0, 0)
-time.max = time(23, 59, 59, 999999)
-time.resolution = timedelta(microseconds=1)
-
-
-class datetime(date):
-    """datetime(year, month, day[, hour[, minute[, second[, microsecond[,tzinfo]]]]])
-
-    The year, month and day arguments are required. tzinfo may be None, or an
-    instance of a tzinfo subclass. The remaining arguments may be ints.
-    """
-    __slots__ = date.__slots__ + time.__slots__
-
-    def __new__(cls, year, month=None, day=None, hour=0, minute=0, second=0,
-                microsecond=0, tzinfo=None, *, fold=0):
-        if (isinstance(year, (bytes, str)) and len(year) == 10 and
-            1 <= ord(year[2:3])&0x7F <= 12):
-            # Pickle support
-            if isinstance(year, str):
-                try:
-                    year = bytes(year, 'latin1')
-                except UnicodeEncodeError:
-                    # More informative error message.
-                    raise ValueError(
-                        "Failed to encode latin1 string when unpickling "
-                        "a datetime object. "
-                        "pickle.load(data, encoding='latin1') is assumed.")
-            self = object.__new__(cls)
-            self.__setstate(year, month)
-            self._hashcode = -1
-            return self
-        year, month, day = _check_date_fields(year, month, day)
-        hour, minute, second, microsecond, fold = _check_time_fields(
-            hour, minute, second, microsecond, fold)
-        _check_tzinfo_arg(tzinfo)
-        self = object.__new__(cls)
-        self._year = year
-        self._month = month
-        self._day = day
-        self._hour = hour
-        self._minute = minute
-        self._second = second
-        self._microsecond = microsecond
-        self._tzinfo = tzinfo
-        self._hashcode = -1
-        self._fold = fold
-        return self
-
-    # Read-only field accessors
-    @property
-    def hour(self):
-        """hour (0-23)"""
-        return self._hour
-
-    @property
-    def minute(self):
-        """minute (0-59)"""
-        return self._minute
-
-    @property
-    def second(self):
-        """second (0-59)"""
-        return self._second
-
-    @property
-    def microsecond(self):
-        """microsecond (0-999999)"""
-        return self._microsecond
-
-    @property
-    def tzinfo(self):
-        """timezone info object"""
-        return self._tzinfo
-
-    @property
-    def fold(self):
-        return self._fold
-
-    @classmethod
-    def _fromtimestamp(cls, t, utc, tz):
-        """Construct a datetime from a POSIX timestamp (like time.time()).
-
-        A timezone info object may be passed in as well.
-        """
-        frac, t = _math.modf(t)
-        us = round(frac * 1e6)
-        if us >= 1000000:
-            t += 1
-            us -= 1000000
-        elif us < 0:
-            t -= 1
-            us += 1000000
-
-        converter = _time.gmtime if utc else _time.localtime
-        y, m, d, hh, mm, ss, weekday, jday, dst = converter(t)
-        ss = min(ss, 59)    # clamp out leap seconds if the platform has them
-        result = cls(y, m, d, hh, mm, ss, us, tz)
-        if tz is None and not utc:
-            # As of version 2015f max fold in IANA database is
-            # 23 hours at 1969-09-30 13:00:00 in Kwajalein.
-            # Let's probe 24 hours in the past to detect a transition:
-            max_fold_seconds = 24 * 3600
-
-            # On Windows localtime_s throws an OSError for negative values,
-            # thus we can't perform fold detection for values of time less
-            # than the max time fold. See comments in _datetimemodule's
-            # version of this method for more details.
-            if t < max_fold_seconds and sys.platform.startswith("win"):
-                return result
-
-            y, m, d, hh, mm, ss = converter(t - max_fold_seconds)[:6]
-            probe1 = cls(y, m, d, hh, mm, ss, us, tz)
-            trans = result - probe1 - timedelta(0, max_fold_seconds)
-            if trans.days < 0:
-                y, m, d, hh, mm, ss = converter(t + trans // timedelta(0, 1))[:6]
-                probe2 = cls(y, m, d, hh, mm, ss, us, tz)
-                if probe2 == result:
-                    result._fold = 1
-        elif tz is not None:
-            result = tz.fromutc(result)
-        return result
-
-    @classmethod
-    def fromtimestamp(cls, t, tz=None):
-        """Construct a datetime from a POSIX timestamp (like time.time()).
-
-        A timezone info object may be passed in as well.
-        """
-        _check_tzinfo_arg(tz)
-
-        return cls._fromtimestamp(t, tz is not None, tz)
-
-    @classmethod
-    def utcfromtimestamp(cls, t):
-        """Construct a naive UTC datetime from a POSIX timestamp."""
-        return cls._fromtimestamp(t, True, None)
-
-    @classmethod
-    def now(cls, tz=None):
-        "Construct a datetime from time.time() and optional time zone info."
-        t = _time.time()
-        return cls.fromtimestamp(t, tz)
-
-    @classmethod
-    def utcnow(cls):
-        "Construct a UTC datetime from time.time()."
-        t = _time.time()
-        return cls.utcfromtimestamp(t)
-
-    @classmethod
-    def combine(cls, date, time, tzinfo=True):
-        "Construct a datetime from a given date and a given time."
-        if not isinstance(date, _date_class):
-            raise TypeError("date argument must be a date instance")
-        if not isinstance(time, _time_class):
-            raise TypeError("time argument must be a time instance")
-        if tzinfo is True:
-            tzinfo = time.tzinfo
-        return cls(date.year, date.month, date.day,
-                   time.hour, time.minute, time.second, time.microsecond,
-                   tzinfo, fold=time.fold)
-
-    @classmethod
-    def fromisoformat(cls, date_string):
-        """Construct a datetime from a string in one of the ISO 8601 formats."""
-        if not isinstance(date_string, str):
-            raise TypeError('fromisoformat: argument must be str')
-
-        if len(date_string) < 7:
-            raise ValueError(f'Invalid isoformat string: {date_string!r}')
-
-        # Split this at the separator
-        try:
-            separator_location = _find_isoformat_datetime_separator(date_string)
-            dstr = date_string[0:separator_location]
-            tstr = date_string[(separator_location+1):]
-
-            date_components = _parse_isoformat_date(dstr)
-        except ValueError:
-            raise ValueError(
-                f'Invalid isoformat string: {date_string!r}') from None
-
-        if tstr:
-            try:
-                time_components = _parse_isoformat_time(tstr)
-            except ValueError:
-                raise ValueError(
-                    f'Invalid isoformat string: {date_string!r}') from None
-        else:
-            time_components = [0, 0, 0, 0, None]
-
-        return cls(*(date_components + time_components))
-
-    def timetuple(self):
-        "Return local time tuple compatible with time.localtime()."
-        dst = self.dst()
-        if dst is None:
-            dst = -1
-        elif dst:
-            dst = 1
-        else:
-            dst = 0
-        return _build_struct_time(self.year, self.month, self.day,
-                                  self.hour, self.minute, self.second,
-                                  dst)
-
-    def _mktime(self):
-        """Return integer POSIX timestamp."""
-        epoch = datetime(1970, 1, 1)
-        max_fold_seconds = 24 * 3600
-        t = (self - epoch) // timedelta(0, 1)
-        def local(u):
-            y, m, d, hh, mm, ss = _time.localtime(u)[:6]
-            return (datetime(y, m, d, hh, mm, ss) - epoch) // timedelta(0, 1)
-
-        # Our goal is to solve t = local(u) for u.
-        a = local(t) - t
-        u1 = t - a
-        t1 = local(u1)
-        if t1 == t:
-            # We found one solution, but it may not be the one we need.
-            # Look for an earlier solution (if `fold` is 0), or a
-            # later one (if `fold` is 1).
-            u2 = u1 + (-max_fold_seconds, max_fold_seconds)[self.fold]
-            b = local(u2) - u2
-            if a == b:
-                return u1
-        else:
-            b = t1 - u1
-            assert a != b
-        u2 = t - b
-        t2 = local(u2)
-        if t2 == t:
-            return u2
-        if t1 == t:
-            return u1
-        # We have found both offsets a and b, but neither t - a nor t - b is
-        # a solution.  This means t is in the gap.
-        return (max, min)[self.fold](u1, u2)
-
-
-    def timestamp(self):
-        "Return POSIX timestamp as float"
-        if self._tzinfo is None:
-            s = self._mktime()
-            return s + self.microsecond / 1e6
-        else:
-            return (self - _EPOCH).total_seconds()
-
-    def utctimetuple(self):
-        "Return UTC time tuple compatible with time.gmtime()."
-        offset = self.utcoffset()
-        if offset:
-            self -= offset
-        y, m, d = self.year, self.month, self.day
-        hh, mm, ss = self.hour, self.minute, self.second
-        return _build_struct_time(y, m, d, hh, mm, ss, 0)
-
-    def date(self):
-        "Return the date part."
-        return date(self._year, self._month, self._day)
-
-    def time(self):
-        "Return the time part, with tzinfo None."
-        return time(self.hour, self.minute, self.second, self.microsecond, fold=self.fold)
-
-    def timetz(self):
-        "Return the time part, with same tzinfo."
-        return time(self.hour, self.minute, self.second, self.microsecond,
-                    self._tzinfo, fold=self.fold)
-
-    def replace(self, year=None, month=None, day=None, hour=None,
-                minute=None, second=None, microsecond=None, tzinfo=True,
-                *, fold=None):
-        """Return a new datetime with new values for the specified fields."""
-        if year is None:
-            year = self.year
-        if month is None:
-            month = self.month
-        if day is None:
-            day = self.day
-        if hour is None:
-            hour = self.hour
-        if minute is None:
-            minute = self.minute
-        if second is None:
-            second = self.second
-        if microsecond is None:
-            microsecond = self.microsecond
-        if tzinfo is True:
-            tzinfo = self.tzinfo
-        if fold is None:
-            fold = self.fold
-        return type(self)(year, month, day, hour, minute, second,
-                          microsecond, tzinfo, fold=fold)
-
-    def _local_timezone(self):
-        if self.tzinfo is None:
-            ts = self._mktime()
-        else:
-            ts = (self - _EPOCH) // timedelta(seconds=1)
-        localtm = _time.localtime(ts)
-        local = datetime(*localtm[:6])
-        # Extract TZ data
-        gmtoff = localtm.tm_gmtoff
-        zone = localtm.tm_zone
-        return timezone(timedelta(seconds=gmtoff), zone)
-
-    def astimezone(self, tz=None):
-        if tz is None:
-            tz = self._local_timezone()
-        elif not isinstance(tz, tzinfo):
-            raise TypeError("tz argument must be an instance of tzinfo")
-
-        mytz = self.tzinfo
-        if mytz is None:
-            mytz = self._local_timezone()
-            myoffset = mytz.utcoffset(self)
-        else:
-            myoffset = mytz.utcoffset(self)
-            if myoffset is None:
-                mytz = self.replace(tzinfo=None)._local_timezone()
-                myoffset = mytz.utcoffset(self)
-
-        if tz is mytz:
-            return self
-
-        # Convert self to UTC, and attach the new time zone object.
-        utc = (self - myoffset).replace(tzinfo=tz)
-
-        # Convert from UTC to tz's local time.
-        return tz.fromutc(utc)
-
-    # Ways to produce a string.
-
-    def ctime(self):
-        "Return ctime() style string."
-        weekday = self.toordinal() % 7 or 7
-        return "%s %s %2d %02d:%02d:%02d %04d" % (
-            _DAYNAMES[weekday],
-            _MONTHNAMES[self._month],
-            self._day,
-            self._hour, self._minute, self._second,
-            self._year)
-
-    def isoformat(self, sep='T', timespec='auto'):
-        """Return the time formatted according to ISO.
-
-        The full format looks like 'YYYY-MM-DD HH:MM:SS.mmmmmm'.
-        By default, the fractional part is omitted if self.microsecond == 0.
-
-        If self.tzinfo is not None, the UTC offset is also attached, giving
-        giving a full format of 'YYYY-MM-DD HH:MM:SS.mmmmmm+HH:MM'.
-
-        Optional argument sep specifies the separator between date and
-        time, default 'T'.
-
-        The optional argument timespec specifies the number of additional
-        terms of the time to include. Valid options are 'auto', 'hours',
-        'minutes', 'seconds', 'milliseconds' and 'microseconds'.
-        """
-        s = ("%04d-%02d-%02d%c" % (self._year, self._month, self._day, sep) +
-             _format_time(self._hour, self._minute, self._second,
-                          self._microsecond, timespec))
-
-        off = self.utcoffset()
-        tz = _format_offset(off)
-        if tz:
-            s += tz
-
-        return s
-
-    def __repr__(self):
-        """Convert to formal string, for repr()."""
-        L = [self._year, self._month, self._day,  # These are never zero
-             self._hour, self._minute, self._second, self._microsecond]
-        if L[-1] == 0:
-            del L[-1]
-        if L[-1] == 0:
-            del L[-1]
-        s = "%s.%s(%s)" % (self.__class__.__module__,
-                           self.__class__.__qualname__,
-                           ", ".join(map(str, L)))
-        if self._tzinfo is not None:
-            assert s[-1:] == ")"
-            s = s[:-1] + ", tzinfo=%r" % self._tzinfo + ")"
-        if self._fold:
-            assert s[-1:] == ")"
-            s = s[:-1] + ", fold=1)"
-        return s
-
-    def __str__(self):
-        "Convert to string, for str()."
-        return self.isoformat(sep=' ')
-
-    @classmethod
-    def strptime(cls, date_string, format):
-        'string, format -> new datetime parsed from a string (like time.strptime()).'
-        import _strptime
-        return _strptime._strptime_datetime(cls, date_string, format)
-
-    def utcoffset(self):
-        """Return the timezone offset as timedelta positive east of UTC (negative west of
-        UTC)."""
-        if self._tzinfo is None:
-            return None
-        offset = self._tzinfo.utcoffset(self)
-        _check_utc_offset("utcoffset", offset)
-        return offset
-
-    def tzname(self):
-        """Return the timezone name.
-
-        Note that the name is 100% informational -- there's no requirement that
-        it mean anything in particular. For example, "GMT", "UTC", "-500",
-        "-5:00", "EDT", "US/Eastern", "America/New York" are all valid replies.
-        """
-        if self._tzinfo is None:
-            return None
-        name = self._tzinfo.tzname(self)
-        _check_tzname(name)
-        return name
-
-    def dst(self):
-        """Return 0 if DST is not in effect, or the DST offset (as timedelta
-        positive eastward) if DST is in effect.
-
-        This is purely informational; the DST offset has already been added to
-        the UTC offset returned by utcoffset() if applicable, so there's no
-        need to consult dst() unless you're interested in displaying the DST
-        info.
-        """
-        if self._tzinfo is None:
-            return None
-        offset = self._tzinfo.dst(self)
-        _check_utc_offset("dst", offset)
-        return offset
-
-    # Comparisons of datetime objects with other.
-
-    def __eq__(self, other):
-        if isinstance(other, datetime):
-            return self._cmp(other, allow_mixed=True) == 0
-        elif not isinstance(other, date):
-            return NotImplemented
-        else:
-            return False
-
-    def __le__(self, other):
-        if isinstance(other, datetime):
-            return self._cmp(other) <= 0
-        elif not isinstance(other, date):
-            return NotImplemented
-        else:
-            _cmperror(self, other)
-
-    def __lt__(self, other):
-        if isinstance(other, datetime):
-            return self._cmp(other) < 0
-        elif not isinstance(other, date):
-            return NotImplemented
-        else:
-            _cmperror(self, other)
-
-    def __ge__(self, other):
-        if isinstance(other, datetime):
-            return self._cmp(other) >= 0
-        elif not isinstance(other, date):
-            return NotImplemented
-        else:
-            _cmperror(self, other)
-
-    def __gt__(self, other):
-        if isinstance(other, datetime):
-            return self._cmp(other) > 0
-        elif not isinstance(other, date):
-            return NotImplemented
-        else:
-            _cmperror(self, other)
-
-    def _cmp(self, other, allow_mixed=False):
-        assert isinstance(other, datetime)
-        mytz = self._tzinfo
-        ottz = other._tzinfo
-        myoff = otoff = None
-
-        if mytz is ottz:
-            base_compare = True
-        else:
-            myoff = self.utcoffset()
-            otoff = other.utcoffset()
-            # Assume that allow_mixed means that we are called from __eq__
-            if allow_mixed:
-                if myoff != self.replace(fold=not self.fold).utcoffset():
-                    return 2
-                if otoff != other.replace(fold=not other.fold).utcoffset():
-                    return 2
-            base_compare = myoff == otoff
-
-        if base_compare:
-            return _cmp((self._year, self._month, self._day,
-                         self._hour, self._minute, self._second,
-                         self._microsecond),
-                        (other._year, other._month, other._day,
-                         other._hour, other._minute, other._second,
-                         other._microsecond))
-        if myoff is None or otoff is None:
-            if allow_mixed:
-                return 2 # arbitrary non-zero value
-            else:
-                raise TypeError("cannot compare naive and aware datetimes")
-        # XXX What follows could be done more efficiently...
-        diff = self - other     # this will take offsets into account
-        if diff.days < 0:
-            return -1
-        return diff and 1 or 0
-
-    def __add__(self, other):
-        "Add a datetime and a timedelta."
-        if not isinstance(other, timedelta):
-            return NotImplemented
-        delta = timedelta(self.toordinal(),
-                          hours=self._hour,
-                          minutes=self._minute,
-                          seconds=self._second,
-                          microseconds=self._microsecond)
-        delta += other
-        hour, rem = divmod(delta.seconds, 3600)
-        minute, second = divmod(rem, 60)
-        if 0 < delta.days <= _MAXORDINAL:
-            return type(self).combine(date.fromordinal(delta.days),
-                                      time(hour, minute, second,
-                                           delta.microseconds,
-                                           tzinfo=self._tzinfo))
-        raise OverflowError("result out of range")
-
-    __radd__ = __add__
-
-    def __sub__(self, other):
-        "Subtract two datetimes, or a datetime and a timedelta."
-        if not isinstance(other, datetime):
-            if isinstance(other, timedelta):
-                return self + -other
-            return NotImplemented
-
-        days1 = self.toordinal()
-        days2 = other.toordinal()
-        secs1 = self._second + self._minute * 60 + self._hour * 3600
-        secs2 = other._second + other._minute * 60 + other._hour * 3600
-        base = timedelta(days1 - days2,
-                         secs1 - secs2,
-                         self._microsecond - other._microsecond)
-        if self._tzinfo is other._tzinfo:
-            return base
-        myoff = self.utcoffset()
-        otoff = other.utcoffset()
-        if myoff == otoff:
-            return base
-        if myoff is None or otoff is None:
-            raise TypeError("cannot mix naive and timezone-aware time")
-        return base + otoff - myoff
-
-    def __hash__(self):
-        if self._hashcode == -1:
-            if self.fold:
-                t = self.replace(fold=0)
-            else:
-                t = self
-            tzoff = t.utcoffset()
-            if tzoff is None:
-                self._hashcode = hash(t._getstate()[0])
-            else:
-                days = _ymd2ord(self.year, self.month, self.day)
-                seconds = self.hour * 3600 + self.minute * 60 + self.second
-                self._hashcode = hash(timedelta(days, seconds, self.microsecond) - tzoff)
-        return self._hashcode
-
-    # Pickle support.
-
-    def _getstate(self, protocol=3):
-        yhi, ylo = divmod(self._year, 256)
-        us2, us3 = divmod(self._microsecond, 256)
-        us1, us2 = divmod(us2, 256)
-        m = self._month
-        if self._fold and protocol > 3:
-            m += 128
-        basestate = bytes([yhi, ylo, m, self._day,
-                           self._hour, self._minute, self._second,
-                           us1, us2, us3])
-        if self._tzinfo is None:
-            return (basestate,)
-        else:
-            return (basestate, self._tzinfo)
-
-    def __setstate(self, string, tzinfo):
-        if tzinfo is not None and not isinstance(tzinfo, _tzinfo_class):
-            raise TypeError("bad tzinfo state arg")
-        (yhi, ylo, m, self._day, self._hour,
-         self._minute, self._second, us1, us2, us3) = string
-        if m > 127:
-            self._fold = 1
-            self._month = m - 128
-        else:
-            self._fold = 0
-            self._month = m
-        self._year = yhi * 256 + ylo
-        self._microsecond = (((us1 << 8) | us2) << 8) | us3
-        self._tzinfo = tzinfo
-
-    def __reduce_ex__(self, protocol):
-        return (self.__class__, self._getstate(protocol))
-
-    def __reduce__(self):
-        return self.__reduce_ex__(2)
-
-
-datetime.min = datetime(1, 1, 1)
-datetime.max = datetime(9999, 12, 31, 23, 59, 59, 999999)
-datetime.resolution = timedelta(microseconds=1)
-
-
-def _isoweek1monday(year):
-    # Helper to calculate the day number of the Monday starting week 1
-    # XXX This could be done more efficiently
-    THURSDAY = 3
-    firstday = _ymd2ord(year, 1, 1)
-    firstweekday = (firstday + 6) % 7  # See weekday() above
-    week1monday = firstday - firstweekday
-    if firstweekday > THURSDAY:
-        week1monday += 7
-    return week1monday
-
-
-class timezone(tzinfo):
-    __slots__ = '_offset', '_name'
-
-    # Sentinel value to disallow None
-    _Omitted = object()
-    def __new__(cls, offset, name=_Omitted):
-        if not isinstance(offset, timedelta):
-            raise TypeError("offset must be a timedelta")
-        if name is cls._Omitted:
-            if not offset:
-                return cls.utc
-            name = None
-        elif not isinstance(name, str):
-            raise TypeError("name must be a string")
-        if not cls._minoffset <= offset <= cls._maxoffset:
-            raise ValueError("offset must be a timedelta "
-                             "strictly between -timedelta(hours=24) and "
-                             "timedelta(hours=24).")
-        return cls._create(offset, name)
-
-    @classmethod
-    def _create(cls, offset, name=None):
-        self = tzinfo.__new__(cls)
-        self._offset = offset
-        self._name = name
-        return self
-
-    def __getinitargs__(self):
-        """pickle support"""
-        if self._name is None:
-            return (self._offset,)
-        return (self._offset, self._name)
-
-    def __eq__(self, other):
-        if isinstance(other, timezone):
-            return self._offset == other._offset
-        return NotImplemented
-
-    def __hash__(self):
-        return hash(self._offset)
-
-    def __repr__(self):
-        """Convert to formal string, for repr().
-
-        >>> tz = timezone.utc
-        >>> repr(tz)
-        'datetime.timezone.utc'
-        >>> tz = timezone(timedelta(hours=-5), 'EST')
-        >>> repr(tz)
-        "datetime.timezone(datetime.timedelta(-1, 68400), 'EST')"
-        """
-        if self is self.utc:
-            return 'datetime.timezone.utc'
-        if self._name is None:
-            return "%s.%s(%r)" % (self.__class__.__module__,
-                                  self.__class__.__qualname__,
-                                  self._offset)
-        return "%s.%s(%r, %r)" % (self.__class__.__module__,
-                                  self.__class__.__qualname__,
-                                  self._offset, self._name)
-
-    def __str__(self):
-        return self.tzname(None)
-
-    def utcoffset(self, dt):
-        if isinstance(dt, datetime) or dt is None:
-            return self._offset
-        raise TypeError("utcoffset() argument must be a datetime instance"
-                        " or None")
-
-    def tzname(self, dt):
-        if isinstance(dt, datetime) or dt is None:
-            if self._name is None:
-                return self._name_from_offset(self._offset)
-            return self._name
-        raise TypeError("tzname() argument must be a datetime instance"
-                        " or None")
-
-    def dst(self, dt):
-        if isinstance(dt, datetime) or dt is None:
-            return None
-        raise TypeError("dst() argument must be a datetime instance"
-                        " or None")
-
-    def fromutc(self, dt):
-        if isinstance(dt, datetime):
-            if dt.tzinfo is not self:
-                raise ValueError("fromutc: dt.tzinfo "
-                                 "is not self")
-            return dt + self._offset
-        raise TypeError("fromutc() argument must be a datetime instance"
-                        " or None")
-
-    _maxoffset = timedelta(hours=24, microseconds=-1)
-    _minoffset = -_maxoffset
-
-    @staticmethod
-    def _name_from_offset(delta):
-        if not delta:
-            return 'UTC'
-        if delta < timedelta(0):
-            sign = '-'
-            delta = -delta
-        else:
-            sign = '+'
-        hours, rest = divmod(delta, timedelta(hours=1))
-        minutes, rest = divmod(rest, timedelta(minutes=1))
-        seconds = rest.seconds
-        microseconds = rest.microseconds
-        if microseconds:
-            return (f'UTC{sign}{hours:02d}:{minutes:02d}:{seconds:02d}'
-                    f'.{microseconds:06d}')
-        if seconds:
-            return f'UTC{sign}{hours:02d}:{minutes:02d}:{seconds:02d}'
-        return f'UTC{sign}{hours:02d}:{minutes:02d}'
-
-UTC = timezone.utc = timezone._create(timedelta(0))
-
-# bpo-37642: These attributes are rounded to the nearest minute for backwards
-# compatibility, even though the constructor will accept a wider range of
-# values. This may change in the future.
-timezone.min = timezone._create(-timedelta(hours=23, minutes=59))
-timezone.max = timezone._create(timedelta(hours=23, minutes=59))
-_EPOCH = datetime(1970, 1, 1, tzinfo=timezone.utc)
-
-# Some time zone algebra.  For a datetime x, let
-#     x.n = x stripped of its timezone -- its naive time.
-#     x.o = x.utcoffset(), and assuming that doesn't raise an exception or
-#           return None
-#     x.d = x.dst(), and assuming that doesn't raise an exception or
-#           return None
-#     x.s = x's standard offset, x.o - x.d
-#
-# Now some derived rules, where k is a duration (timedelta).
-#
-# 1. x.o = x.s + x.d
-#    This follows from the definition of x.s.
-#
-# 2. If x and y have the same tzinfo member, x.s = y.s.
-#    This is actually a requirement, an assumption we need to make about
-#    sane tzinfo classes.
-#
-# 3. The naive UTC time corresponding to x is x.n - x.o.
-#    This is again a requirement for a sane tzinfo class.
-#
-# 4. (x+k).s = x.s
-#    This follows from #2, and that datetime.timetz+timedelta preserves tzinfo.
-#
-# 5. (x+k).n = x.n + k
-#    Again follows from how arithmetic is defined.
-#
-# Now we can explain tz.fromutc(x).  Let's assume it's an interesting case
-# (meaning that the various tzinfo methods exist, and don't blow up or return
-# None when called).
-#
-# The function wants to return a datetime y with timezone tz, equivalent to x.
-# x is already in UTC.
-#
-# By #3, we want
-#
-#     y.n - y.o = x.n                             [1]
-#
-# The algorithm starts by attaching tz to x.n, and calling that y.  So
-# x.n = y.n at the start.  Then it wants to add a duration k to y, so that [1]
-# becomes true; in effect, we want to solve [2] for k:
-#
-#    (y+k).n - (y+k).o = x.n                      [2]
-#
-# By #1, this is the same as
-#
-#    (y+k).n - ((y+k).s + (y+k).d) = x.n          [3]
-#
-# By #5, (y+k).n = y.n + k, which equals x.n + k because x.n=y.n at the start.
-# Substituting that into [3],
-#
-#    x.n + k - (y+k).s - (y+k).d = x.n; the x.n terms cancel, leaving
-#    k - (y+k).s - (y+k).d = 0; rearranging,
-#    k = (y+k).s - (y+k).d; by #4, (y+k).s == y.s, so
-#    k = y.s - (y+k).d
-#
-# On the RHS, (y+k).d can't be computed directly, but y.s can be, and we
-# approximate k by ignoring the (y+k).d term at first.  Note that k can't be
-# very large, since all offset-returning methods return a duration of magnitude
-# less than 24 hours.  For that reason, if y is firmly in std time, (y+k).d must
-# be 0, so ignoring it has no consequence then.
-#
-# In any case, the new value is
-#
-#     z = y + y.s                                 [4]
-#
-# It's helpful to step back at look at [4] from a higher level:  it's simply
-# mapping from UTC to tz's standard time.
-#
-# At this point, if
-#
-#     z.n - z.o = x.n                             [5]
-#
-# we have an equivalent time, and are almost done.  The insecurity here is
-# at the start of daylight time.  Picture US Eastern for concreteness.  The wall
-# time jumps from 1:59 to 3:00, and wall hours of the form 2:MM don't make good
-# sense then.  The docs ask that an Eastern tzinfo class consider such a time to
-# be EDT (because it's "after 2"), which is a redundant spelling of 1:MM EST
-# on the day DST starts.  We want to return the 1:MM EST spelling because that's
-# the only spelling that makes sense on the local wall clock.
-#
-# In fact, if [5] holds at this point, we do have the standard-time spelling,
-# but that takes a bit of proof.  We first prove a stronger result.  What's the
-# difference between the LHS and RHS of [5]?  Let
-#
-#     diff = x.n - (z.n - z.o)                    [6]
-#
-# Now
-#     z.n =                       by [4]
-#     (y + y.s).n =               by #5
-#     y.n + y.s =                 since y.n = x.n
-#     x.n + y.s =                 since z and y are have the same tzinfo member,
-#                                     y.s = z.s by #2
-#     x.n + z.s
-#
-# Plugging that back into [6] gives
-#
-#     diff =
-#     x.n - ((x.n + z.s) - z.o) =     expanding
-#     x.n - x.n - z.s + z.o =         cancelling
-#     - z.s + z.o =                   by #2
-#     z.d
-#
-# So diff = z.d.
-#
-# If [5] is true now, diff = 0, so z.d = 0 too, and we have the standard-time
-# spelling we wanted in the endcase described above.  We're done.  Contrarily,
-# if z.d = 0, then we have a UTC equivalent, and are also done.
-#
-# If [5] is not true now, diff = z.d != 0, and z.d is the offset we need to
-# add to z (in effect, z is in tz's standard time, and we need to shift the
-# local clock into tz's daylight time).
-#
-# Let
-#
-#     z' = z + z.d = z + diff                     [7]
-#
-# and we can again ask whether
-#
-#     z'.n - z'.o = x.n                           [8]
-#
-# If so, we're done.  If not, the tzinfo class is insane, according to the
-# assumptions we've made.  This also requires a bit of proof.  As before, let's
-# compute the difference between the LHS and RHS of [8] (and skipping some of
-# the justifications for the kinds of substitutions we've done several times
-# already):
-#
-#     diff' = x.n - (z'.n - z'.o) =           replacing z'.n via [7]
-#             x.n  - (z.n + diff - z'.o) =    replacing diff via [6]
-#             x.n - (z.n + x.n - (z.n - z.o) - z'.o) =
-#             x.n - z.n - x.n + z.n - z.o + z'.o =    cancel x.n
-#             - z.n + z.n - z.o + z'.o =              cancel z.n
-#             - z.o + z'.o =                      #1 twice
-#             -z.s - z.d + z'.s + z'.d =          z and z' have same tzinfo
-#             z'.d - z.d
-#
-# So z' is UTC-equivalent to x iff z'.d = z.d at this point.  If they are equal,
-# we've found the UTC-equivalent so are done.  In fact, we stop with [7] and
-# return z', not bothering to compute z'.d.
-#
-# How could z.d and z'd differ?  z' = z + z.d [7], so merely moving z' by
-# a dst() offset, and starting *from* a time already in DST (we know z.d != 0),
-# would have to change the result dst() returns:  we start in DST, and moving
-# a little further into it takes us out of DST.
-#
-# There isn't a sane case where this can happen.  The closest it gets is at
-# the end of DST, where there's an hour in UTC with no spelling in a hybrid
-# tzinfo class.  In US Eastern, that's 5:MM UTC = 0:MM EST = 1:MM EDT.  During
-# that hour, on an Eastern clock 1:MM is taken as being in standard time (6:MM
-# UTC) because the docs insist on that, but 0:MM is taken as being in daylight
-# time (4:MM UTC).  There is no local time mapping to 5:MM UTC.  The local
-# clock jumps from 1:59 back to 1:00 again, and repeats the 1:MM hour in
-# standard time.  Since that's what the local clock *does*, we want to map both
-# UTC hours 5:MM and 6:MM to 1:MM Eastern.  The result is ambiguous
-# in local time, but so it goes -- it's the way the local clock works.
-#
-# When x = 5:MM UTC is the input to this algorithm, x.o=0, y.o=-5 and y.d=0,
-# so z=0:MM.  z.d=60 (minutes) then, so [5] doesn't hold and we keep going.
-# z' = z + z.d = 1:MM then, and z'.d=0, and z'.d - z.d = -60 != 0 so [8]
-# (correctly) concludes that z' is not UTC-equivalent to x.
-#
-# Because we know z.d said z was in daylight time (else [5] would have held and
-# we would have stopped then), and we know z.d != z'.d (else [8] would have held
-# and we have stopped then), and there are only 2 possible values dst() can
-# return in Eastern, it follows that z'.d must be 0 (which it is in the example,
-# but the reasoning doesn't depend on the example -- it depends on there being
-# two possible dst() outcomes, one zero and the other non-zero).  Therefore
-# z' must be in standard time, and is the spelling we want in this case.
-#
-# Note again that z' is not UTC-equivalent as far as the hybrid tzinfo class is
-# concerned (because it takes z' as being in standard time rather than the
-# daylight time we intend here), but returning it gives the real-life "local
-# clock repeats an hour" behavior when mapping the "unspellable" UTC hour into
-# tz.
-#
-# When the input is 6:MM, z=1:MM and z.d=0, and we stop at once, again with
-# the 1:MM standard time spelling we want.
-#
-# So how can this break?  One of the assumptions must be violated.  Two
-# possibilities:
-#
-# 1) [2] effectively says that y.s is invariant across all y belong to a given
-#    time zone.  This isn't true if, for political reasons or continental drift,
-#    a region decides to change its base offset from UTC.
-#
-# 2) There may be versions of "double daylight" time where the tail end of
-#    the analysis gives up a step too early.  I haven't thought about that
-#    enough to say.
-#
-# In any case, it's clear that the default fromutc() is strong enough to handle
-# "almost all" time zones:  so long as the standard offset is invariant, it
-# doesn't matter if daylight time transition points change from year to year, or
-# if daylight time is skipped in some years; it doesn't matter how large or
-# small dst() may get within its bounds; and it doesn't even matter if some
-# perverse time zone returns a negative dst()).  So a breaking case must be
-# pretty bizarre, and a tzinfo subclass can override fromutc() if it is.
-
 try:
     from _datetime import *
-except ImportError:
-    pass
-else:
-    # Clean up unused names
-    del (_DAYNAMES, _DAYS_BEFORE_MONTH, _DAYS_IN_MONTH, _DI100Y, _DI400Y,
-         _DI4Y, _EPOCH, _MAXORDINAL, _MONTHNAMES, _build_struct_time,
-         _check_date_fields, _check_time_fields,
-         _check_tzinfo_arg, _check_tzname, _check_utc_offset, _cmp, _cmperror,
-         _date_class, _days_before_month, _days_before_year, _days_in_month,
-         _format_time, _format_offset, _index, _is_leap, _isoweek1monday, _math,
-         _ord2ymd, _time, _time_class, _tzinfo_class, _wrap_strftime, _ymd2ord,
-         _divide_and_round, _parse_isoformat_date, _parse_isoformat_time,
-         _parse_hh_mm_ss_ff, _IsoCalendarDate, _isoweek_to_gregorian,
-         _find_isoformat_datetime_separator, _FRACTION_CORRECTION,
-         _is_ascii_digit)
-    # XXX Since import * above excludes names that start with _,
-    # docstring does not get overwritten. In the future, it may be
-    # appropriate to maintain a single module level docstring and
-    # remove the following line.
     from _datetime import __doc__
+except ImportError:
+    from _pydatetime import *
+    from _pydatetime import __doc__
+
+__all__ = ("date", "datetime", "time", "timedelta", "timezone", "tzinfo",
+           "MINYEAR", "MAXYEAR", "UTC")
diff --git a/contrib/tools/python3/src/Lib/dis.py b/contrib/tools/python3/src/Lib/dis.py
index 196c886f78..320dec03d2 100644
--- a/contrib/tools/python3/src/Lib/dis.py
+++ b/contrib/tools/python3/src/Lib/dis.py
@@ -11,6 +11,8 @@ from opcode import (
     _cache_format,
     _inline_cache_entries,
     _nb_ops,
+    _intrinsic_1_descs,
+    _intrinsic_2_descs,
     _specializations,
     _specialized_instructions,
 )
@@ -34,9 +36,16 @@ MAKE_FUNCTION = opmap['MAKE_FUNCTION']
 MAKE_FUNCTION_FLAGS = ('defaults', 'kwdefaults', 'annotations', 'closure')
 
 LOAD_CONST = opmap['LOAD_CONST']
+RETURN_CONST = opmap['RETURN_CONST']
 LOAD_GLOBAL = opmap['LOAD_GLOBAL']
 BINARY_OP = opmap['BINARY_OP']
 JUMP_BACKWARD = opmap['JUMP_BACKWARD']
+FOR_ITER = opmap['FOR_ITER']
+SEND = opmap['SEND']
+LOAD_ATTR = opmap['LOAD_ATTR']
+LOAD_SUPER_ATTR = opmap['LOAD_SUPER_ATTR']
+CALL_INTRINSIC_1 = opmap['CALL_INTRINSIC_1']
+CALL_INTRINSIC_2 = opmap['CALL_INTRINSIC_2']
 
 CACHE = opmap["CACHE"]
 
@@ -60,10 +69,10 @@ def _try_compile(source, name):
        expect code objects
     """
     try:
-        c = compile(source, name, 'eval')
+        return compile(source, name, 'eval')
     except SyntaxError:
-        c = compile(source, name, 'exec')
-    return c
+        pass
+    return compile(source, name, 'exec')
 
 def dis(x=None, *, file=None, depth=None, show_caches=False, adaptive=False):
     """Disassemble classes, methods, functions, and other compiled objects.
@@ -114,7 +123,10 @@ def distb(tb=None, *, file=None, show_caches=False, adaptive=False):
     """Disassemble a traceback (default: last traceback)."""
     if tb is None:
         try:
-            tb = sys.last_traceback
+            if hasattr(sys, 'last_exc'):
+                tb = sys.last_exc.__traceback__
+            else:
+                tb = sys.last_traceback
         except AttributeError:
             raise RuntimeError("no last traceback to disassemble") from None
         while tb.tb_next: tb = tb.tb_next
@@ -361,9 +373,8 @@ def _get_const_value(op, arg, co_consts):
     assert op in hasconst
 
     argval = UNKNOWN
-    if op == LOAD_CONST:
-        if co_consts is not None:
-            argval = co_consts[arg]
+    if co_consts is not None:
+        argval = co_consts[arg]
     return argval
 
 def _get_const_info(op, arg, co_consts):
@@ -450,6 +461,7 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
         argrepr = ''
         positions = Positions(*next(co_positions, ()))
         deop = _deoptop(op)
+        caches = _inline_cache_entries[deop]
         if arg is not None:
             #  Set argval to the dereferenced value of the argument when
             #  available, and argrepr to the string representation of argval.
@@ -463,6 +475,14 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
                     argval, argrepr = _get_name_info(arg//2, get_name)
                     if (arg & 1) and argrepr:
                         argrepr = "NULL + " + argrepr
+                elif deop == LOAD_ATTR:
+                    argval, argrepr = _get_name_info(arg//2, get_name)
+                    if (arg & 1) and argrepr:
+                        argrepr = "NULL|self + " + argrepr
+                elif deop == LOAD_SUPER_ATTR:
+                    argval, argrepr = _get_name_info(arg//4, get_name)
+                    if (arg & 1) and argrepr:
+                        argrepr = "NULL|self + " + argrepr
                 else:
                     argval, argrepr = _get_name_info(arg, get_name)
             elif deop in hasjabs:
@@ -471,11 +491,12 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
             elif deop in hasjrel:
                 signed_arg = -arg if _is_backward_jump(deop) else arg
                 argval = offset + 2 + signed_arg*2
+                argval += 2 * caches
                 argrepr = "to " + repr(argval)
             elif deop in haslocal or deop in hasfree:
                 argval, argrepr = _get_name_info(arg, varname_from_oparg)
             elif deop in hascompare:
-                argval = cmp_op[arg]
+                argval = cmp_op[arg>>4]
                 argrepr = argval
             elif deop == FORMAT_VALUE:
                 argval, argrepr = FORMAT_VALUE_CONVERTERS[arg & 0x3]
@@ -489,6 +510,10 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
                                     if arg & (1<<i))
             elif deop == BINARY_OP:
                 _, argrepr = _nb_ops[arg]
+            elif deop == CALL_INTRINSIC_1:
+                argrepr = _intrinsic_1_descs[arg]
+            elif deop == CALL_INTRINSIC_2:
+                argrepr = _intrinsic_2_descs[arg]
         yield Instruction(_all_opname[op], op,
                           arg, argval, argrepr,
                           offset, starts_line, is_jump_target, positions)
@@ -504,9 +529,8 @@ def _get_instructions_bytes(code, varname_from_oparg=None,
             for i in range(size):
                 offset += 2
                 # Only show the fancy argrepr for a CACHE instruction when it's
-                # the first entry for a particular cache value and the
-                # instruction using it is actually quickened:
-                if i == 0 and op != deop:
+                # the first entry for a particular cache value:
+                if i == 0:
                     data = code[offset: offset + 2 * size]
                     argrepr = f"{name}: {int.from_bytes(data, sys.byteorder)}"
                 else:
@@ -569,7 +593,12 @@ def _disassemble_bytes(code, lasti=-1, varname_from_oparg=None,
                            instr.offset > 0)
         if new_source_line:
             print(file=file)
-        is_current_instr = instr.offset == lasti
+        if show_caches:
+            is_current_instr = instr.offset == lasti
+        else:
+            # Each CACHE takes 2 bytes
+            is_current_instr = instr.offset <= lasti \
+                <= instr.offset + 2 * _inline_cache_entries[_deoptop(instr.opcode)]
         print(instr._disassemble(lineno_width, is_current_instr, offset_width),
               file=file)
     if exception_entries:
@@ -602,7 +631,7 @@ def _unpack_opargs(code):
         op = code[i]
         deop = _deoptop(op)
         caches = _inline_cache_entries[deop]
-        if deop >= HAVE_ARGUMENT:
+        if deop in hasarg:
             arg = code[i+1] | extended_arg
             extended_arg = (arg << 8) if deop == EXTENDED_ARG else 0
             # The oparg is stored as a signed integer
@@ -624,11 +653,14 @@ def findlabels(code):
     labels = []
     for offset, op, arg in _unpack_opargs(code):
         if arg is not None:
-            if op in hasjrel:
-                if _is_backward_jump(op):
+            deop = _deoptop(op)
+            caches = _inline_cache_entries[deop]
+            if deop in hasjrel:
+                if _is_backward_jump(deop):
                     arg = -arg
                 label = offset + 2 + arg*2
-            elif op in hasjabs:
+                label += 2 * caches
+            elif deop in hasjabs:
                 label = arg*2
             else:
                 continue
@@ -656,7 +688,6 @@ def _find_imports(co):
     the corresponding args to __import__.
     """
     IMPORT_NAME = opmap['IMPORT_NAME']
-    LOAD_CONST = opmap['LOAD_CONST']
 
     consts = co.co_consts
     names = co.co_names
diff --git a/contrib/tools/python3/src/Lib/distutils/__init__.py b/contrib/tools/python3/src/Lib/distutils/__init__.py
deleted file mode 100644
index fdad6f65a7..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/__init__.py
+++ /dev/null
@@ -1,20 +0,0 @@
-"""distutils
-
-The main package for the Python Module Distribution Utilities.  Normally
-used from a setup script as
-
-   from distutils.core import setup
-
-   setup (...)
-"""
-
-import sys
-import warnings
-
-__version__ = sys.version[:sys.version.index(' ')]
-
-_DEPRECATION_MESSAGE = ("The distutils package is deprecated and slated for "
-                        "removal in Python 3.12. Use setuptools or check "
-                        "PEP 632 for potential alternatives")
-warnings.warn(_DEPRECATION_MESSAGE,
-              DeprecationWarning, 2)
diff --git a/contrib/tools/python3/src/Lib/distutils/_msvccompiler.py b/contrib/tools/python3/src/Lib/distutils/_msvccompiler.py
deleted file mode 100644
index af8099a407..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/_msvccompiler.py
+++ /dev/null
@@ -1,539 +0,0 @@
-"""distutils._msvccompiler
-
-Contains MSVCCompiler, an implementation of the abstract CCompiler class
-for Microsoft Visual Studio 2015.
-
-The module is compatible with VS 2015 and later. You can find legacy support
-for older versions in distutils.msvc9compiler and distutils.msvccompiler.
-"""
-
-# Written by Perry Stoll
-# hacked by Robin Becker and Thomas Heller to do a better job of
-#   finding DevStudio (through the registry)
-# ported to VS 2005 and VS 2008 by Christian Heimes
-# ported to VS 2015 by Steve Dower
-
-import os
-import subprocess
-import winreg
-
-from distutils.errors import DistutilsExecError, DistutilsPlatformError, \
-                             CompileError, LibError, LinkError
-from distutils.ccompiler import CCompiler, gen_lib_options
-from distutils import log
-from distutils.util import get_platform
-
-from itertools import count
-
-def _find_vc2015():
-    try:
-        key = winreg.OpenKeyEx(
-            winreg.HKEY_LOCAL_MACHINE,
-            r"Software\Microsoft\VisualStudio\SxS\VC7",
-            access=winreg.KEY_READ | winreg.KEY_WOW64_32KEY
-        )
-    except OSError:
-        log.debug("Visual C++ is not registered")
-        return None, None
-
-    best_version = 0
-    best_dir = None
-    with key:
-        for i in count():
-            try:
-                v, vc_dir, vt = winreg.EnumValue(key, i)
-            except OSError:
-                break
-            if v and vt == winreg.REG_SZ and os.path.isdir(vc_dir):
-                try:
-                    version = int(float(v))
-                except (ValueError, TypeError):
-                    continue
-                if version >= 14 and version > best_version:
-                    best_version, best_dir = version, vc_dir
-    return best_version, best_dir
-
-def _find_vc2017():
-    """Returns "15, path" based on the result of invoking vswhere.exe
-    If no install is found, returns "None, None"
-
-    The version is returned to avoid unnecessarily changing the function
-    result. It may be ignored when the path is not None.
-
-    If vswhere.exe is not available, by definition, VS 2017 is not
-    installed.
-    """
-    root = os.environ.get("ProgramFiles(x86)") or os.environ.get("ProgramFiles")
-    if not root:
-        return None, None
-
-    try:
-        path = subprocess.check_output([
-            os.path.join(root, "Microsoft Visual Studio", "Installer", "vswhere.exe"),
-            "-latest",
-            "-prerelease",
-            "-requires", "Microsoft.VisualStudio.Component.VC.Tools.x86.x64",
-            "-property", "installationPath",
-            "-products", "*",
-        ], encoding="mbcs", errors="strict").strip()
-    except (subprocess.CalledProcessError, OSError, UnicodeDecodeError):
-        return None, None
-
-    path = os.path.join(path, "VC", "Auxiliary", "Build")
-    if os.path.isdir(path):
-        return 15, path
-
-    return None, None
-
-PLAT_SPEC_TO_RUNTIME = {
-    'x86' : 'x86',
-    'x86_amd64' : 'x64',
-    'x86_arm' : 'arm',
-    'x86_arm64' : 'arm64'
-}
-
-def _find_vcvarsall(plat_spec):
-    # bpo-38597: Removed vcruntime return value
-    _, best_dir = _find_vc2017()
-
-    if not best_dir:
-        best_version, best_dir = _find_vc2015()
-
-    if not best_dir:
-        log.debug("No suitable Visual C++ version found")
-        return None, None
-
-    vcvarsall = os.path.join(best_dir, "vcvarsall.bat")
-    if not os.path.isfile(vcvarsall):
-        log.debug("%s cannot be found", vcvarsall)
-        return None, None
-
-    return vcvarsall, None
-
-def _get_vc_env(plat_spec):
-    if os.getenv("DISTUTILS_USE_SDK"):
-        return {
-            key.lower(): value
-            for key, value in os.environ.items()
-        }
-
-    vcvarsall, _ = _find_vcvarsall(plat_spec)
-    if not vcvarsall:
-        raise DistutilsPlatformError("Unable to find vcvarsall.bat")
-
-    try:
-        out = subprocess.check_output(
-            'cmd /u /c "{}" {} && set'.format(vcvarsall, plat_spec),
-            stderr=subprocess.STDOUT,
-        ).decode('utf-16le', errors='replace')
-    except subprocess.CalledProcessError as exc:
-        log.error(exc.output)
-        raise DistutilsPlatformError("Error executing {}"
-                .format(exc.cmd))
-
-    env = {
-        key.lower(): value
-        for key, _, value in
-        (line.partition('=') for line in out.splitlines())
-        if key and value
-    }
-
-    return env
-
-def _find_exe(exe, paths=None):
-    """Return path to an MSVC executable program.
-
-    Tries to find the program in several places: first, one of the
-    MSVC program search paths from the registry; next, the directories
-    in the PATH environment variable.  If any of those work, return an
-    absolute path that is known to exist.  If none of them work, just
-    return the original program name, 'exe'.
-    """
-    if not paths:
-        paths = os.getenv('path').split(os.pathsep)
-    for p in paths:
-        fn = os.path.join(os.path.abspath(p), exe)
-        if os.path.isfile(fn):
-            return fn
-    return exe
-
-# A map keyed by get_platform() return values to values accepted by
-# 'vcvarsall.bat'. Always cross-compile from x86 to work with the
-# lighter-weight MSVC installs that do not include native 64-bit tools.
-PLAT_TO_VCVARS = {
-    'win32' : 'x86',
-    'win-amd64' : 'x86_amd64',
-    'win-arm32' : 'x86_arm',
-    'win-arm64' : 'x86_arm64'
-}
-
-class MSVCCompiler(CCompiler) :
-    """Concrete class that implements an interface to Microsoft Visual C++,
-       as defined by the CCompiler abstract class."""
-
-    compiler_type = 'msvc'
-
-    # Just set this so CCompiler's constructor doesn't barf.  We currently
-    # don't use the 'set_executables()' bureaucracy provided by CCompiler,
-    # as it really isn't necessary for this sort of single-compiler class.
-    # Would be nice to have a consistent interface with UnixCCompiler,
-    # though, so it's worth thinking about.
-    executables = {}
-
-    # Private class data (need to distinguish C from C++ source for compiler)
-    _c_extensions = ['.c']
-    _cpp_extensions = ['.cc', '.cpp', '.cxx']
-    _rc_extensions = ['.rc']
-    _mc_extensions = ['.mc']
-
-    # Needed for the filename generation methods provided by the
-    # base class, CCompiler.
-    src_extensions = (_c_extensions + _cpp_extensions +
-                      _rc_extensions + _mc_extensions)
-    res_extension = '.res'
-    obj_extension = '.obj'
-    static_lib_extension = '.lib'
-    shared_lib_extension = '.dll'
-    static_lib_format = shared_lib_format = '%s%s'
-    exe_extension = '.exe'
-
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-        CCompiler.__init__ (self, verbose, dry_run, force)
-        # target platform (.plat_name is consistent with 'bdist')
-        self.plat_name = None
-        self.initialized = False
-
-    def initialize(self, plat_name=None):
-        # multi-init means we would need to check platform same each time...
-        assert not self.initialized, "don't init multiple times"
-        if plat_name is None:
-            plat_name = get_platform()
-        # sanity check for platforms to prevent obscure errors later.
-        if plat_name not in PLAT_TO_VCVARS:
-            raise DistutilsPlatformError("--plat-name must be one of {}"
-                                         .format(tuple(PLAT_TO_VCVARS)))
-
-        # Get the vcvarsall.bat spec for the requested platform.
-        plat_spec = PLAT_TO_VCVARS[plat_name]
-
-        vc_env = _get_vc_env(plat_spec)
-        if not vc_env:
-            raise DistutilsPlatformError("Unable to find a compatible "
-                "Visual Studio installation.")
-
-        self._paths = vc_env.get('path', '')
-        paths = self._paths.split(os.pathsep)
-        self.cc = _find_exe("cl.exe", paths)
-        self.linker = _find_exe("link.exe", paths)
-        self.lib = _find_exe("lib.exe", paths)
-        self.rc = _find_exe("rc.exe", paths)   # resource compiler
-        self.mc = _find_exe("mc.exe", paths)   # message compiler
-        self.mt = _find_exe("mt.exe", paths)   # message compiler
-
-        for dir in vc_env.get('include', '').split(os.pathsep):
-            if dir:
-                self.add_include_dir(dir.rstrip(os.sep))
-
-        for dir in vc_env.get('lib', '').split(os.pathsep):
-            if dir:
-                self.add_library_dir(dir.rstrip(os.sep))
-
-        self.preprocess_options = None
-        # bpo-38597: Always compile with dynamic linking
-        # Future releases of Python 3.x will include all past
-        # versions of vcruntime*.dll for compatibility.
-        self.compile_options = [
-            '/nologo', '/Ox', '/W3', '/GL', '/DNDEBUG', '/MD'
-        ]
-
-        self.compile_options_debug = [
-            '/nologo', '/Od', '/MDd', '/Zi', '/W3', '/D_DEBUG'
-        ]
-
-        ldflags = [
-            '/nologo', '/INCREMENTAL:NO', '/LTCG'
-        ]
-
-        ldflags_debug = [
-            '/nologo', '/INCREMENTAL:NO', '/LTCG', '/DEBUG:FULL'
-        ]
-
-        self.ldflags_exe = [*ldflags, '/MANIFEST:EMBED,ID=1']
-        self.ldflags_exe_debug = [*ldflags_debug, '/MANIFEST:EMBED,ID=1']
-        self.ldflags_shared = [*ldflags, '/DLL', '/MANIFEST:EMBED,ID=2', '/MANIFESTUAC:NO']
-        self.ldflags_shared_debug = [*ldflags_debug, '/DLL', '/MANIFEST:EMBED,ID=2', '/MANIFESTUAC:NO']
-        self.ldflags_static = [*ldflags]
-        self.ldflags_static_debug = [*ldflags_debug]
-
-        self._ldflags = {
-            (CCompiler.EXECUTABLE, None): self.ldflags_exe,
-            (CCompiler.EXECUTABLE, False): self.ldflags_exe,
-            (CCompiler.EXECUTABLE, True): self.ldflags_exe_debug,
-            (CCompiler.SHARED_OBJECT, None): self.ldflags_shared,
-            (CCompiler.SHARED_OBJECT, False): self.ldflags_shared,
-            (CCompiler.SHARED_OBJECT, True): self.ldflags_shared_debug,
-            (CCompiler.SHARED_LIBRARY, None): self.ldflags_static,
-            (CCompiler.SHARED_LIBRARY, False): self.ldflags_static,
-            (CCompiler.SHARED_LIBRARY, True): self.ldflags_static_debug,
-        }
-
-        self.initialized = True
-
-    # -- Worker methods ------------------------------------------------
-
-    def object_filenames(self,
-                         source_filenames,
-                         strip_dir=0,
-                         output_dir=''):
-        ext_map = {
-            **{ext: self.obj_extension for ext in self.src_extensions},
-            **{ext: self.res_extension for ext in self._rc_extensions + self._mc_extensions},
-        }
-
-        output_dir = output_dir or ''
-
-        def make_out_path(p):
-            base, ext = os.path.splitext(p)
-            if strip_dir:
-                base = os.path.basename(base)
-            else:
-                _, base = os.path.splitdrive(base)
-                if base.startswith((os.path.sep, os.path.altsep)):
-                    base = base[1:]
-            try:
-                # XXX: This may produce absurdly long paths. We should check
-                # the length of the result and trim base until we fit within
-                # 260 characters.
-                return os.path.join(output_dir, base + ext_map[ext])
-            except LookupError:
-                # Better to raise an exception instead of silently continuing
-                # and later complain about sources and targets having
-                # different lengths
-                raise CompileError("Don't know how to compile {}".format(p))
-
-        return list(map(make_out_path, source_filenames))
-
-
-    def compile(self, sources,
-                output_dir=None, macros=None, include_dirs=None, debug=0,
-                extra_preargs=None, extra_postargs=None, depends=None):
-
-        if not self.initialized:
-            self.initialize()
-        compile_info = self._setup_compile(output_dir, macros, include_dirs,
-                                           sources, depends, extra_postargs)
-        macros, objects, extra_postargs, pp_opts, build = compile_info
-
-        compile_opts = extra_preargs or []
-        compile_opts.append('/c')
-        if debug:
-            compile_opts.extend(self.compile_options_debug)
-        else:
-            compile_opts.extend(self.compile_options)
-
-
-        add_cpp_opts = False
-
-        for obj in objects:
-            try:
-                src, ext = build[obj]
-            except KeyError:
-                continue
-            if debug:
-                # pass the full pathname to MSVC in debug mode,
-                # this allows the debugger to find the source file
-                # without asking the user to browse for it
-                src = os.path.abspath(src)
-
-            if ext in self._c_extensions:
-                input_opt = "/Tc" + src
-            elif ext in self._cpp_extensions:
-                input_opt = "/Tp" + src
-                add_cpp_opts = True
-            elif ext in self._rc_extensions:
-                # compile .RC to .RES file
-                input_opt = src
-                output_opt = "/fo" + obj
-                try:
-                    self.spawn([self.rc] + pp_opts + [output_opt, input_opt])
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            elif ext in self._mc_extensions:
-                # Compile .MC to .RC file to .RES file.
-                #   * '-h dir' specifies the directory for the
-                #     generated include file
-                #   * '-r dir' specifies the target directory of the
-                #     generated RC file and the binary message resource
-                #     it includes
-                #
-                # For now (since there are no options to change this),
-                # we use the source-directory for the include file and
-                # the build directory for the RC file and message
-                # resources. This works at least for win32all.
-                h_dir = os.path.dirname(src)
-                rc_dir = os.path.dirname(obj)
-                try:
-                    # first compile .MC to .RC and .H file
-                    self.spawn([self.mc, '-h', h_dir, '-r', rc_dir, src])
-                    base, _ = os.path.splitext(os.path.basename (src))
-                    rc_file = os.path.join(rc_dir, base + '.rc')
-                    # then compile .RC to .RES file
-                    self.spawn([self.rc, "/fo" + obj, rc_file])
-
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            else:
-                # how to handle this file?
-                raise CompileError("Don't know how to compile {} to {}"
-                                   .format(src, obj))
-
-            args = [self.cc] + compile_opts + pp_opts
-            if add_cpp_opts:
-                args.append('/EHsc')
-            args.append(input_opt)
-            args.append("/Fo" + obj)
-            args.extend(extra_postargs)
-
-            try:
-                self.spawn(args)
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-        return objects
-
-
-    def create_static_lib(self,
-                          objects,
-                          output_libname,
-                          output_dir=None,
-                          debug=0,
-                          target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        objects, output_dir = self._fix_object_args(objects, output_dir)
-        output_filename = self.library_filename(output_libname,
-                                                output_dir=output_dir)
-
-        if self._need_link(objects, output_filename):
-            lib_args = objects + ['/OUT:' + output_filename]
-            if debug:
-                pass # XXX what goes here?
-            try:
-                log.debug('Executing "%s" %s', self.lib, ' '.join(lib_args))
-                self.spawn([self.lib] + lib_args)
-            except DistutilsExecError as msg:
-                raise LibError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-
-    def link(self,
-             target_desc,
-             objects,
-             output_filename,
-             output_dir=None,
-             libraries=None,
-             library_dirs=None,
-             runtime_library_dirs=None,
-             export_symbols=None,
-             debug=0,
-             extra_preargs=None,
-             extra_postargs=None,
-             build_temp=None,
-             target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        objects, output_dir = self._fix_object_args(objects, output_dir)
-        fixed_args = self._fix_lib_args(libraries, library_dirs,
-                                        runtime_library_dirs)
-        libraries, library_dirs, runtime_library_dirs = fixed_args
-
-        if runtime_library_dirs:
-            self.warn("I don't know what to do with 'runtime_library_dirs': "
-                       + str(runtime_library_dirs))
-
-        lib_opts = gen_lib_options(self,
-                                   library_dirs, runtime_library_dirs,
-                                   libraries)
-        if output_dir is not None:
-            output_filename = os.path.join(output_dir, output_filename)
-
-        if self._need_link(objects, output_filename):
-            ldflags = self._ldflags[target_desc, debug]
-
-            export_opts = ["/EXPORT:" + sym for sym in (export_symbols or [])]
-
-            ld_args = (ldflags + lib_opts + export_opts +
-                       objects + ['/OUT:' + output_filename])
-
-            # The MSVC linker generates .lib and .exp files, which cannot be
-            # suppressed by any linker switches. The .lib files may even be
-            # needed! Make sure they are generated in the temporary build
-            # directory. Since they have different names for debug and release
-            # builds, they can go into the same directory.
-            build_temp = os.path.dirname(objects[0])
-            if export_symbols is not None:
-                (dll_name, dll_ext) = os.path.splitext(
-                    os.path.basename(output_filename))
-                implib_file = os.path.join(
-                    build_temp,
-                    self.library_filename(dll_name))
-                ld_args.append ('/IMPLIB:' + implib_file)
-
-            if extra_preargs:
-                ld_args[:0] = extra_preargs
-            if extra_postargs:
-                ld_args.extend(extra_postargs)
-
-            output_dir = os.path.dirname(os.path.abspath(output_filename))
-            self.mkpath(output_dir)
-            try:
-                log.debug('Executing "%s" %s', self.linker, ' '.join(ld_args))
-                self.spawn([self.linker] + ld_args)
-            except DistutilsExecError as msg:
-                raise LinkError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    def spawn(self, cmd):
-        old_path = os.getenv('path')
-        try:
-            os.environ['path'] = self._paths
-            return super().spawn(cmd)
-        finally:
-            os.environ['path'] = old_path
-
-    # -- Miscellaneous methods -----------------------------------------
-    # These are all used by the 'gen_lib_options() function, in
-    # ccompiler.py.
-
-    def library_dir_option(self, dir):
-        return "/LIBPATH:" + dir
-
-    def runtime_library_dir_option(self, dir):
-        raise DistutilsPlatformError(
-              "don't know how to set runtime library search path for MSVC")
-
-    def library_option(self, lib):
-        return self.library_filename(lib)
-
-    def find_library_file(self, dirs, lib, debug=0):
-        # Prefer a debugging library if found (and requested), but deal
-        # with it if we don't have one.
-        if debug:
-            try_names = [lib + "_d", lib]
-        else:
-            try_names = [lib]
-        for dir in dirs:
-            for name in try_names:
-                libfile = os.path.join(dir, self.library_filename(name))
-                if os.path.isfile(libfile):
-                    return libfile
-        else:
-            # Oops, didn't find it in *any* of 'dirs'
-            return None
diff --git a/contrib/tools/python3/src/Lib/distutils/archive_util.py b/contrib/tools/python3/src/Lib/distutils/archive_util.py
deleted file mode 100644
index 565a3117b4..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/archive_util.py
+++ /dev/null
@@ -1,256 +0,0 @@
-"""distutils.archive_util
-
-Utility functions for creating archive files (tarballs, zip files,
-that sort of thing)."""
-
-import os
-from warnings import warn
-import sys
-
-try:
-    import zipfile
-except ImportError:
-    zipfile = None
-
-
-from distutils.errors import DistutilsExecError
-from distutils.spawn import spawn
-from distutils.dir_util import mkpath
-from distutils import log
-
-try:
-    from pwd import getpwnam
-except ImportError:
-    getpwnam = None
-
-try:
-    from grp import getgrnam
-except ImportError:
-    getgrnam = None
-
-def _get_gid(name):
-    """Returns a gid, given a group name."""
-    if getgrnam is None or name is None:
-        return None
-    try:
-        result = getgrnam(name)
-    except KeyError:
-        result = None
-    if result is not None:
-        return result[2]
-    return None
-
-def _get_uid(name):
-    """Returns an uid, given a user name."""
-    if getpwnam is None or name is None:
-        return None
-    try:
-        result = getpwnam(name)
-    except KeyError:
-        result = None
-    if result is not None:
-        return result[2]
-    return None
-
-def make_tarball(base_name, base_dir, compress="gzip", verbose=0, dry_run=0,
-                 owner=None, group=None):
-    """Create a (possibly compressed) tar file from all the files under
-    'base_dir'.
-
-    'compress' must be "gzip" (the default), "bzip2", "xz", "compress", or
-    None.  ("compress" will be deprecated in Python 3.2)
-
-    'owner' and 'group' can be used to define an owner and a group for the
-    archive that is being built. If not provided, the current owner and group
-    will be used.
-
-    The output tar file will be named 'base_dir' +  ".tar", possibly plus
-    the appropriate compression extension (".gz", ".bz2", ".xz" or ".Z").
-
-    Returns the output filename.
-    """
-    tar_compression = {'gzip': 'gz', 'bzip2': 'bz2', 'xz': 'xz', None: '',
-                       'compress': ''}
-    compress_ext = {'gzip': '.gz', 'bzip2': '.bz2', 'xz': '.xz',
-                    'compress': '.Z'}
-
-    # flags for compression program, each element of list will be an argument
-    if compress is not None and compress not in compress_ext.keys():
-        raise ValueError(
-              "bad value for 'compress': must be None, 'gzip', 'bzip2', "
-              "'xz' or 'compress'")
-
-    archive_name = base_name + '.tar'
-    if compress != 'compress':
-        archive_name += compress_ext.get(compress, '')
-
-    mkpath(os.path.dirname(archive_name), dry_run=dry_run)
-
-    # creating the tarball
-    import tarfile  # late import so Python build itself doesn't break
-
-    log.info('Creating tar archive')
-
-    uid = _get_uid(owner)
-    gid = _get_gid(group)
-
-    def _set_uid_gid(tarinfo):
-        if gid is not None:
-            tarinfo.gid = gid
-            tarinfo.gname = group
-        if uid is not None:
-            tarinfo.uid = uid
-            tarinfo.uname = owner
-        return tarinfo
-
-    if not dry_run:
-        tar = tarfile.open(archive_name, 'w|%s' % tar_compression[compress])
-        try:
-            tar.add(base_dir, filter=_set_uid_gid)
-        finally:
-            tar.close()
-
-    # compression using `compress`
-    if compress == 'compress':
-        warn("'compress' will be deprecated.", PendingDeprecationWarning)
-        # the option varies depending on the platform
-        compressed_name = archive_name + compress_ext[compress]
-        if sys.platform == 'win32':
-            cmd = [compress, archive_name, compressed_name]
-        else:
-            cmd = [compress, '-f', archive_name]
-        spawn(cmd, dry_run=dry_run)
-        return compressed_name
-
-    return archive_name
-
-def make_zipfile(base_name, base_dir, verbose=0, dry_run=0):
-    """Create a zip file from all the files under 'base_dir'.
-
-    The output zip file will be named 'base_name' + ".zip".  Uses either the
-    "zipfile" Python module (if available) or the InfoZIP "zip" utility
-    (if installed and found on the default search path).  If neither tool is
-    available, raises DistutilsExecError.  Returns the name of the output zip
-    file.
-    """
-    zip_filename = base_name + ".zip"
-    mkpath(os.path.dirname(zip_filename), dry_run=dry_run)
-
-    # If zipfile module is not available, try spawning an external
-    # 'zip' command.
-    if zipfile is None:
-        if verbose:
-            zipoptions = "-r"
-        else:
-            zipoptions = "-rq"
-
-        try:
-            spawn(["zip", zipoptions, zip_filename, base_dir],
-                  dry_run=dry_run)
-        except DistutilsExecError:
-            # XXX really should distinguish between "couldn't find
-            # external 'zip' command" and "zip failed".
-            raise DistutilsExecError(("unable to create zip file '%s': "
-                   "could neither import the 'zipfile' module nor "
-                   "find a standalone zip utility") % zip_filename)
-
-    else:
-        log.info("creating '%s' and adding '%s' to it",
-                 zip_filename, base_dir)
-
-        if not dry_run:
-            try:
-                zip = zipfile.ZipFile(zip_filename, "w",
-                                      compression=zipfile.ZIP_DEFLATED)
-            except RuntimeError:
-                zip = zipfile.ZipFile(zip_filename, "w",
-                                      compression=zipfile.ZIP_STORED)
-
-            with zip:
-                if base_dir != os.curdir:
-                    path = os.path.normpath(os.path.join(base_dir, ''))
-                    zip.write(path, path)
-                    log.info("adding '%s'", path)
-                for dirpath, dirnames, filenames in os.walk(base_dir):
-                    for name in dirnames:
-                        path = os.path.normpath(os.path.join(dirpath, name, ''))
-                        zip.write(path, path)
-                        log.info("adding '%s'", path)
-                    for name in filenames:
-                        path = os.path.normpath(os.path.join(dirpath, name))
-                        if os.path.isfile(path):
-                            zip.write(path, path)
-                            log.info("adding '%s'", path)
-
-    return zip_filename
-
-ARCHIVE_FORMATS = {
-    'gztar': (make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),
-    'bztar': (make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),
-    'xztar': (make_tarball, [('compress', 'xz')], "xz'ed tar-file"),
-    'ztar':  (make_tarball, [('compress', 'compress')], "compressed tar file"),
-    'tar':   (make_tarball, [('compress', None)], "uncompressed tar file"),
-    'zip':   (make_zipfile, [],"ZIP file")
-    }
-
-def check_archive_formats(formats):
-    """Returns the first format from the 'format' list that is unknown.
-
-    If all formats are known, returns None
-    """
-    for format in formats:
-        if format not in ARCHIVE_FORMATS:
-            return format
-    return None
-
-def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0,
-                 dry_run=0, owner=None, group=None):
-    """Create an archive file (eg. zip or tar).
-
-    'base_name' is the name of the file to create, minus any format-specific
-    extension; 'format' is the archive format: one of "zip", "tar", "gztar",
-    "bztar", "xztar", or "ztar".
-
-    'root_dir' is a directory that will be the root directory of the
-    archive; ie. we typically chdir into 'root_dir' before creating the
-    archive.  'base_dir' is the directory where we start archiving from;
-    ie. 'base_dir' will be the common prefix of all files and
-    directories in the archive.  'root_dir' and 'base_dir' both default
-    to the current directory.  Returns the name of the archive file.
-
-    'owner' and 'group' are used when creating a tar archive. By default,
-    uses the current owner and group.
-    """
-    save_cwd = os.getcwd()
-    if root_dir is not None:
-        log.debug("changing into '%s'", root_dir)
-        base_name = os.path.abspath(base_name)
-        if not dry_run:
-            os.chdir(root_dir)
-
-    if base_dir is None:
-        base_dir = os.curdir
-
-    kwargs = {'dry_run': dry_run}
-
-    try:
-        format_info = ARCHIVE_FORMATS[format]
-    except KeyError:
-        raise ValueError("unknown archive format '%s'" % format)
-
-    func = format_info[0]
-    for arg, val in format_info[1]:
-        kwargs[arg] = val
-
-    if format != 'zip':
-        kwargs['owner'] = owner
-        kwargs['group'] = group
-
-    try:
-        filename = func(base_name, base_dir, **kwargs)
-    finally:
-        if root_dir is not None:
-            log.debug("changing back to '%s'", save_cwd)
-            os.chdir(save_cwd)
-
-    return filename
diff --git a/contrib/tools/python3/src/Lib/distutils/bcppcompiler.py b/contrib/tools/python3/src/Lib/distutils/bcppcompiler.py
deleted file mode 100644
index 071fea5d03..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/bcppcompiler.py
+++ /dev/null
@@ -1,393 +0,0 @@
-"""distutils.bcppcompiler
-
-Contains BorlandCCompiler, an implementation of the abstract CCompiler class
-for the Borland C++ compiler.
-"""
-
-# This implementation by Lyle Johnson, based on the original msvccompiler.py
-# module and using the directions originally published by Gordon Williams.
-
-# XXX looks like there's a LOT of overlap between these two classes:
-# someone should sit down and factor out the common code as
-# WindowsCCompiler!  --GPW
-
-
-import os
-from distutils.errors import \
-     DistutilsExecError, \
-     CompileError, LibError, LinkError, UnknownFileError
-from distutils.ccompiler import \
-     CCompiler, gen_preprocess_options
-from distutils.file_util import write_file
-from distutils.dep_util import newer
-from distutils import log
-
-class BCPPCompiler(CCompiler) :
-    """Concrete class that implements an interface to the Borland C/C++
-    compiler, as defined by the CCompiler abstract class.
-    """
-
-    compiler_type = 'bcpp'
-
-    # Just set this so CCompiler's constructor doesn't barf.  We currently
-    # don't use the 'set_executables()' bureaucracy provided by CCompiler,
-    # as it really isn't necessary for this sort of single-compiler class.
-    # Would be nice to have a consistent interface with UnixCCompiler,
-    # though, so it's worth thinking about.
-    executables = {}
-
-    # Private class data (need to distinguish C from C++ source for compiler)
-    _c_extensions = ['.c']
-    _cpp_extensions = ['.cc', '.cpp', '.cxx']
-
-    # Needed for the filename generation methods provided by the
-    # base class, CCompiler.
-    src_extensions = _c_extensions + _cpp_extensions
-    obj_extension = '.obj'
-    static_lib_extension = '.lib'
-    shared_lib_extension = '.dll'
-    static_lib_format = shared_lib_format = '%s%s'
-    exe_extension = '.exe'
-
-
-    def __init__ (self,
-                  verbose=0,
-                  dry_run=0,
-                  force=0):
-
-        CCompiler.__init__ (self, verbose, dry_run, force)
-
-        # These executables are assumed to all be in the path.
-        # Borland doesn't seem to use any special registry settings to
-        # indicate their installation locations.
-
-        self.cc = "bcc32.exe"
-        self.linker = "ilink32.exe"
-        self.lib = "tlib.exe"
-
-        self.preprocess_options = None
-        self.compile_options = ['/tWM', '/O2', '/q', '/g0']
-        self.compile_options_debug = ['/tWM', '/Od', '/q', '/g0']
-
-        self.ldflags_shared = ['/Tpd', '/Gn', '/q', '/x']
-        self.ldflags_shared_debug = ['/Tpd', '/Gn', '/q', '/x']
-        self.ldflags_static = []
-        self.ldflags_exe = ['/Gn', '/q', '/x']
-        self.ldflags_exe_debug = ['/Gn', '/q', '/x','/r']
-
-
-    # -- Worker methods ------------------------------------------------
-
-    def compile(self, sources,
-                output_dir=None, macros=None, include_dirs=None, debug=0,
-                extra_preargs=None, extra_postargs=None, depends=None):
-
-        macros, objects, extra_postargs, pp_opts, build = \
-                self._setup_compile(output_dir, macros, include_dirs, sources,
-                                    depends, extra_postargs)
-        compile_opts = extra_preargs or []
-        compile_opts.append ('-c')
-        if debug:
-            compile_opts.extend (self.compile_options_debug)
-        else:
-            compile_opts.extend (self.compile_options)
-
-        for obj in objects:
-            try:
-                src, ext = build[obj]
-            except KeyError:
-                continue
-            # XXX why do the normpath here?
-            src = os.path.normpath(src)
-            obj = os.path.normpath(obj)
-            # XXX _setup_compile() did a mkpath() too but before the normpath.
-            # Is it possible to skip the normpath?
-            self.mkpath(os.path.dirname(obj))
-
-            if ext == '.res':
-                # This is already a binary file -- skip it.
-                continue # the 'for' loop
-            if ext == '.rc':
-                # This needs to be compiled to a .res file -- do it now.
-                try:
-                    self.spawn (["brcc32", "-fo", obj, src])
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue # the 'for' loop
-
-            # The next two are both for the real compiler.
-            if ext in self._c_extensions:
-                input_opt = ""
-            elif ext in self._cpp_extensions:
-                input_opt = "-P"
-            else:
-                # Unknown file type -- no extra options.  The compiler
-                # will probably fail, but let it just in case this is a
-                # file the compiler recognizes even if we don't.
-                input_opt = ""
-
-            output_opt = "-o" + obj
-
-            # Compiler command line syntax is: "bcc32 [options] file(s)".
-            # Note that the source file names must appear at the end of
-            # the command line.
-            try:
-                self.spawn ([self.cc] + compile_opts + pp_opts +
-                            [input_opt, output_opt] +
-                            extra_postargs + [src])
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-        return objects
-
-    # compile ()
-
-
-    def create_static_lib (self,
-                           objects,
-                           output_libname,
-                           output_dir=None,
-                           debug=0,
-                           target_lang=None):
-
-        (objects, output_dir) = self._fix_object_args (objects, output_dir)
-        output_filename = \
-            self.library_filename (output_libname, output_dir=output_dir)
-
-        if self._need_link (objects, output_filename):
-            lib_args = [output_filename, '/u'] + objects
-            if debug:
-                pass                    # XXX what goes here?
-            try:
-                self.spawn ([self.lib] + lib_args)
-            except DistutilsExecError as msg:
-                raise LibError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    # create_static_lib ()
-
-
-    def link (self,
-              target_desc,
-              objects,
-              output_filename,
-              output_dir=None,
-              libraries=None,
-              library_dirs=None,
-              runtime_library_dirs=None,
-              export_symbols=None,
-              debug=0,
-              extra_preargs=None,
-              extra_postargs=None,
-              build_temp=None,
-              target_lang=None):
-
-        # XXX this ignores 'build_temp'!  should follow the lead of
-        # msvccompiler.py
-
-        (objects, output_dir) = self._fix_object_args (objects, output_dir)
-        (libraries, library_dirs, runtime_library_dirs) = \
-            self._fix_lib_args (libraries, library_dirs, runtime_library_dirs)
-
-        if runtime_library_dirs:
-            log.warn("I don't know what to do with 'runtime_library_dirs': %s",
-                     str(runtime_library_dirs))
-
-        if output_dir is not None:
-            output_filename = os.path.join (output_dir, output_filename)
-
-        if self._need_link (objects, output_filename):
-
-            # Figure out linker args based on type of target.
-            if target_desc == CCompiler.EXECUTABLE:
-                startup_obj = 'c0w32'
-                if debug:
-                    ld_args = self.ldflags_exe_debug[:]
-                else:
-                    ld_args = self.ldflags_exe[:]
-            else:
-                startup_obj = 'c0d32'
-                if debug:
-                    ld_args = self.ldflags_shared_debug[:]
-                else:
-                    ld_args = self.ldflags_shared[:]
-
-
-            # Create a temporary exports file for use by the linker
-            if export_symbols is None:
-                def_file = ''
-            else:
-                head, tail = os.path.split (output_filename)
-                modname, ext = os.path.splitext (tail)
-                temp_dir = os.path.dirname(objects[0]) # preserve tree structure
-                def_file = os.path.join (temp_dir, '%s.def' % modname)
-                contents = ['EXPORTS']
-                for sym in (export_symbols or []):
-                    contents.append('  %s=_%s' % (sym, sym))
-                self.execute(write_file, (def_file, contents),
-                             "writing %s" % def_file)
-
-            # Borland C++ has problems with '/' in paths
-            objects2 = map(os.path.normpath, objects)
-            # split objects in .obj and .res files
-            # Borland C++ needs them at different positions in the command line
-            objects = [startup_obj]
-            resources = []
-            for file in objects2:
-                (base, ext) = os.path.splitext(os.path.normcase(file))
-                if ext == '.res':
-                    resources.append(file)
-                else:
-                    objects.append(file)
-
-
-            for l in library_dirs:
-                ld_args.append("/L%s" % os.path.normpath(l))
-            ld_args.append("/L.") # we sometimes use relative paths
-
-            # list of object files
-            ld_args.extend(objects)
-
-            # XXX the command-line syntax for Borland C++ is a bit wonky;
-            # certain filenames are jammed together in one big string, but
-            # comma-delimited.  This doesn't mesh too well with the
-            # Unix-centric attitude (with a DOS/Windows quoting hack) of
-            # 'spawn()', so constructing the argument list is a bit
-            # awkward.  Note that doing the obvious thing and jamming all
-            # the filenames and commas into one argument would be wrong,
-            # because 'spawn()' would quote any filenames with spaces in
-            # them.  Arghghh!.  Apparently it works fine as coded...
-
-            # name of dll/exe file
-            ld_args.extend([',',output_filename])
-            # no map file and start libraries
-            ld_args.append(',,')
-
-            for lib in libraries:
-                # see if we find it and if there is a bcpp specific lib
-                # (xxx_bcpp.lib)
-                libfile = self.find_library_file(library_dirs, lib, debug)
-                if libfile is None:
-                    ld_args.append(lib)
-                    # probably a BCPP internal library -- don't warn
-                else:
-                    # full name which prefers bcpp_xxx.lib over xxx.lib
-                    ld_args.append(libfile)
-
-            # some default libraries
-            ld_args.append ('import32')
-            ld_args.append ('cw32mt')
-
-            # def file for export symbols
-            ld_args.extend([',',def_file])
-            # add resource files
-            ld_args.append(',')
-            ld_args.extend(resources)
-
-
-            if extra_preargs:
-                ld_args[:0] = extra_preargs
-            if extra_postargs:
-                ld_args.extend(extra_postargs)
-
-            self.mkpath (os.path.dirname (output_filename))
-            try:
-                self.spawn ([self.linker] + ld_args)
-            except DistutilsExecError as msg:
-                raise LinkError(msg)
-
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    # link ()
-
-    # -- Miscellaneous methods -----------------------------------------
-
-
-    def find_library_file (self, dirs, lib, debug=0):
-        # List of effective library names to try, in order of preference:
-        # xxx_bcpp.lib is better than xxx.lib
-        # and xxx_d.lib is better than xxx.lib if debug is set
-        #
-        # The "_bcpp" suffix is to handle a Python installation for people
-        # with multiple compilers (primarily Distutils hackers, I suspect
-        # ;-).  The idea is they'd have one static library for each
-        # compiler they care about, since (almost?) every Windows compiler
-        # seems to have a different format for static libraries.
-        if debug:
-            dlib = (lib + "_d")
-            try_names = (dlib + "_bcpp", lib + "_bcpp", dlib, lib)
-        else:
-            try_names = (lib + "_bcpp", lib)
-
-        for dir in dirs:
-            for name in try_names:
-                libfile = os.path.join(dir, self.library_filename(name))
-                if os.path.exists(libfile):
-                    return libfile
-        else:
-            # Oops, didn't find it in *any* of 'dirs'
-            return None
-
-    # overwrite the one from CCompiler to support rc and res-files
-    def object_filenames (self,
-                          source_filenames,
-                          strip_dir=0,
-                          output_dir=''):
-        if output_dir is None: output_dir = ''
-        obj_names = []
-        for src_name in source_filenames:
-            # use normcase to make sure '.rc' is really '.rc' and not '.RC'
-            (base, ext) = os.path.splitext (os.path.normcase(src_name))
-            if ext not in (self.src_extensions + ['.rc','.res']):
-                raise UnknownFileError("unknown file type '%s' (from '%s')" % \
-                      (ext, src_name))
-            if strip_dir:
-                base = os.path.basename (base)
-            if ext == '.res':
-                # these can go unchanged
-                obj_names.append (os.path.join (output_dir, base + ext))
-            elif ext == '.rc':
-                # these need to be compiled to .res-files
-                obj_names.append (os.path.join (output_dir, base + '.res'))
-            else:
-                obj_names.append (os.path.join (output_dir,
-                                            base + self.obj_extension))
-        return obj_names
-
-    # object_filenames ()
-
-    def preprocess (self,
-                    source,
-                    output_file=None,
-                    macros=None,
-                    include_dirs=None,
-                    extra_preargs=None,
-                    extra_postargs=None):
-
-        (_, macros, include_dirs) = \
-            self._fix_compile_args(None, macros, include_dirs)
-        pp_opts = gen_preprocess_options(macros, include_dirs)
-        pp_args = ['cpp32.exe'] + pp_opts
-        if output_file is not None:
-            pp_args.append('-o' + output_file)
-        if extra_preargs:
-            pp_args[:0] = extra_preargs
-        if extra_postargs:
-            pp_args.extend(extra_postargs)
-        pp_args.append(source)
-
-        # We need to preprocess: either we're being forced to, or the
-        # source file is newer than the target (or the target doesn't
-        # exist).
-        if self.force or output_file is None or newer(source, output_file):
-            if output_file:
-                self.mkpath(os.path.dirname(output_file))
-            try:
-                self.spawn(pp_args)
-            except DistutilsExecError as msg:
-                print(msg)
-                raise CompileError(msg)
-
-    # preprocess()
diff --git a/contrib/tools/python3/src/Lib/distutils/ccompiler.py b/contrib/tools/python3/src/Lib/distutils/ccompiler.py
deleted file mode 100644
index 4c47f2ed24..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/ccompiler.py
+++ /dev/null
@@ -1,1116 +0,0 @@
-"""distutils.ccompiler
-
-Contains CCompiler, an abstract base class that defines the interface
-for the Distutils compiler abstraction model."""
-
-import sys, os, re
-from distutils.errors import *
-from distutils.spawn import spawn
-from distutils.file_util import move_file
-from distutils.dir_util import mkpath
-from distutils.dep_util import newer_group
-from distutils.util import split_quoted, execute
-from distutils import log
-
-class CCompiler:
-    """Abstract base class to define the interface that must be implemented
-    by real compiler classes.  Also has some utility methods used by
-    several compiler classes.
-
-    The basic idea behind a compiler abstraction class is that each
-    instance can be used for all the compile/link steps in building a
-    single project.  Thus, attributes common to all of those compile and
-    link steps -- include directories, macros to define, libraries to link
-    against, etc. -- are attributes of the compiler instance.  To allow for
-    variability in how individual files are treated, most of those
-    attributes may be varied on a per-compilation or per-link basis.
-    """
-
-    # 'compiler_type' is a class attribute that identifies this class.  It
-    # keeps code that wants to know what kind of compiler it's dealing with
-    # from having to import all possible compiler classes just to do an
-    # 'isinstance'.  In concrete CCompiler subclasses, 'compiler_type'
-    # should really, really be one of the keys of the 'compiler_class'
-    # dictionary (see below -- used by the 'new_compiler()' factory
-    # function) -- authors of new compiler interface classes are
-    # responsible for updating 'compiler_class'!
-    compiler_type = None
-
-    # XXX things not handled by this compiler abstraction model:
-    #   * client can't provide additional options for a compiler,
-    #     e.g. warning, optimization, debugging flags.  Perhaps this
-    #     should be the domain of concrete compiler abstraction classes
-    #     (UnixCCompiler, MSVCCompiler, etc.) -- or perhaps the base
-    #     class should have methods for the common ones.
-    #   * can't completely override the include or library searchg
-    #     path, ie. no "cc -I -Idir1 -Idir2" or "cc -L -Ldir1 -Ldir2".
-    #     I'm not sure how widely supported this is even by Unix
-    #     compilers, much less on other platforms.  And I'm even less
-    #     sure how useful it is; maybe for cross-compiling, but
-    #     support for that is a ways off.  (And anyways, cross
-    #     compilers probably have a dedicated binary with the
-    #     right paths compiled in.  I hope.)
-    #   * can't do really freaky things with the library list/library
-    #     dirs, e.g. "-Ldir1 -lfoo -Ldir2 -lfoo" to link against
-    #     different versions of libfoo.a in different locations.  I
-    #     think this is useless without the ability to null out the
-    #     library search path anyways.
-
-
-    # Subclasses that rely on the standard filename generation methods
-    # implemented below should override these; see the comment near
-    # those methods ('object_filenames()' et. al.) for details:
-    src_extensions = None               # list of strings
-    obj_extension = None                # string
-    static_lib_extension = None
-    shared_lib_extension = None         # string
-    static_lib_format = None            # format string
-    shared_lib_format = None            # prob. same as static_lib_format
-    exe_extension = None                # string
-
-    # Default language settings. language_map is used to detect a source
-    # file or Extension target language, checking source filenames.
-    # language_order is used to detect the language precedence, when deciding
-    # what language to use when mixing source types. For example, if some
-    # extension has two files with ".c" extension, and one with ".cpp", it
-    # is still linked as c++.
-    language_map = {".c"   : "c",
-                    ".cc"  : "c++",
-                    ".cpp" : "c++",
-                    ".cxx" : "c++",
-                    ".m"   : "objc",
-                   }
-    language_order = ["c++", "objc", "c"]
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-        self.dry_run = dry_run
-        self.force = force
-        self.verbose = verbose
-
-        # 'output_dir': a common output directory for object, library,
-        # shared object, and shared library files
-        self.output_dir = None
-
-        # 'macros': a list of macro definitions (or undefinitions).  A
-        # macro definition is a 2-tuple (name, value), where the value is
-        # either a string or None (no explicit value).  A macro
-        # undefinition is a 1-tuple (name,).
-        self.macros = []
-
-        # 'include_dirs': a list of directories to search for include files
-        self.include_dirs = []
-
-        # 'libraries': a list of libraries to include in any link
-        # (library names, not filenames: eg. "foo" not "libfoo.a")
-        self.libraries = []
-
-        # 'library_dirs': a list of directories to search for libraries
-        self.library_dirs = []
-
-        # 'runtime_library_dirs': a list of directories to search for
-        # shared libraries/objects at runtime
-        self.runtime_library_dirs = []
-
-        # 'objects': a list of object files (or similar, such as explicitly
-        # named library files) to include on any link
-        self.objects = []
-
-        for key in self.executables.keys():
-            self.set_executable(key, self.executables[key])
-
-    def set_executables(self, **kwargs):
-        """Define the executables (and options for them) that will be run
-        to perform the various stages of compilation.  The exact set of
-        executables that may be specified here depends on the compiler
-        class (via the 'executables' class attribute), but most will have:
-          compiler      the C/C++ compiler
-          linker_so     linker used to create shared objects and libraries
-          linker_exe    linker used to create binary executables
-          archiver      static library creator
-
-        On platforms with a command-line (Unix, DOS/Windows), each of these
-        is a string that will be split into executable name and (optional)
-        list of arguments.  (Splitting the string is done similarly to how
-        Unix shells operate: words are delimited by spaces, but quotes and
-        backslashes can override this.  See
-        'distutils.util.split_quoted()'.)
-        """
-
-        # Note that some CCompiler implementation classes will define class
-        # attributes 'cpp', 'cc', etc. with hard-coded executable names;
-        # this is appropriate when a compiler class is for exactly one
-        # compiler/OS combination (eg. MSVCCompiler).  Other compiler
-        # classes (UnixCCompiler, in particular) are driven by information
-        # discovered at run-time, since there are many different ways to do
-        # basically the same things with Unix C compilers.
-
-        for key in kwargs:
-            if key not in self.executables:
-                raise ValueError("unknown executable '%s' for class %s" %
-                      (key, self.__class__.__name__))
-            self.set_executable(key, kwargs[key])
-
-    def set_executable(self, key, value):
-        if isinstance(value, str):
-            setattr(self, key, split_quoted(value))
-        else:
-            setattr(self, key, value)
-
-    def _find_macro(self, name):
-        i = 0
-        for defn in self.macros:
-            if defn[0] == name:
-                return i
-            i += 1
-        return None
-
-    def _check_macro_definitions(self, definitions):
-        """Ensures that every element of 'definitions' is a valid macro
-        definition, ie. either (name,value) 2-tuple or a (name,) tuple.  Do
-        nothing if all definitions are OK, raise TypeError otherwise.
-        """
-        for defn in definitions:
-            if not (isinstance(defn, tuple) and
-                    (len(defn) in (1, 2) and
-                      (isinstance (defn[1], str) or defn[1] is None)) and
-                    isinstance (defn[0], str)):
-                raise TypeError(("invalid macro definition '%s': " % defn) + \
-                      "must be tuple (string,), (string, string), or " + \
-                      "(string, None)")
-
-
-    # -- Bookkeeping methods -------------------------------------------
-
-    def define_macro(self, name, value=None):
-        """Define a preprocessor macro for all compilations driven by this
-        compiler object.  The optional parameter 'value' should be a
-        string; if it is not supplied, then the macro will be defined
-        without an explicit value and the exact outcome depends on the
-        compiler used (XXX true? does ANSI say anything about this?)
-        """
-        # Delete from the list of macro definitions/undefinitions if
-        # already there (so that this one will take precedence).
-        i = self._find_macro (name)
-        if i is not None:
-            del self.macros[i]
-
-        self.macros.append((name, value))
-
-    def undefine_macro(self, name):
-        """Undefine a preprocessor macro for all compilations driven by
-        this compiler object.  If the same macro is defined by
-        'define_macro()' and undefined by 'undefine_macro()' the last call
-        takes precedence (including multiple redefinitions or
-        undefinitions).  If the macro is redefined/undefined on a
-        per-compilation basis (ie. in the call to 'compile()'), then that
-        takes precedence.
-        """
-        # Delete from the list of macro definitions/undefinitions if
-        # already there (so that this one will take precedence).
-        i = self._find_macro (name)
-        if i is not None:
-            del self.macros[i]
-
-        undefn = (name,)
-        self.macros.append(undefn)
-
-    def add_include_dir(self, dir):
-        """Add 'dir' to the list of directories that will be searched for
-        header files.  The compiler is instructed to search directories in
-        the order in which they are supplied by successive calls to
-        'add_include_dir()'.
-        """
-        self.include_dirs.append(dir)
-
-    def set_include_dirs(self, dirs):
-        """Set the list of directories that will be searched to 'dirs' (a
-        list of strings).  Overrides any preceding calls to
-        'add_include_dir()'; subsequence calls to 'add_include_dir()' add
-        to the list passed to 'set_include_dirs()'.  This does not affect
-        any list of standard include directories that the compiler may
-        search by default.
-        """
-        self.include_dirs = dirs[:]
-
-    def add_library(self, libname):
-        """Add 'libname' to the list of libraries that will be included in
-        all links driven by this compiler object.  Note that 'libname'
-        should *not* be the name of a file containing a library, but the
-        name of the library itself: the actual filename will be inferred by
-        the linker, the compiler, or the compiler class (depending on the
-        platform).
-
-        The linker will be instructed to link against libraries in the
-        order they were supplied to 'add_library()' and/or
-        'set_libraries()'.  It is perfectly valid to duplicate library
-        names; the linker will be instructed to link against libraries as
-        many times as they are mentioned.
-        """
-        self.libraries.append(libname)
-
-    def set_libraries(self, libnames):
-        """Set the list of libraries to be included in all links driven by
-        this compiler object to 'libnames' (a list of strings).  This does
-        not affect any standard system libraries that the linker may
-        include by default.
-        """
-        self.libraries = libnames[:]
-
-    def add_library_dir(self, dir):
-        """Add 'dir' to the list of directories that will be searched for
-        libraries specified to 'add_library()' and 'set_libraries()'.  The
-        linker will be instructed to search for libraries in the order they
-        are supplied to 'add_library_dir()' and/or 'set_library_dirs()'.
-        """
-        self.library_dirs.append(dir)
-
-    def set_library_dirs(self, dirs):
-        """Set the list of library search directories to 'dirs' (a list of
-        strings).  This does not affect any standard library search path
-        that the linker may search by default.
-        """
-        self.library_dirs = dirs[:]
-
-    def add_runtime_library_dir(self, dir):
-        """Add 'dir' to the list of directories that will be searched for
-        shared libraries at runtime.
-        """
-        self.runtime_library_dirs.append(dir)
-
-    def set_runtime_library_dirs(self, dirs):
-        """Set the list of directories to search for shared libraries at
-        runtime to 'dirs' (a list of strings).  This does not affect any
-        standard search path that the runtime linker may search by
-        default.
-        """
-        self.runtime_library_dirs = dirs[:]
-
-    def add_link_object(self, object):
-        """Add 'object' to the list of object files (or analogues, such as
-        explicitly named library files or the output of "resource
-        compilers") to be included in every link driven by this compiler
-        object.
-        """
-        self.objects.append(object)
-
-    def set_link_objects(self, objects):
-        """Set the list of object files (or analogues) to be included in
-        every link to 'objects'.  This does not affect any standard object
-        files that the linker may include by default (such as system
-        libraries).
-        """
-        self.objects = objects[:]
-
-
-    # -- Private utility methods --------------------------------------
-    # (here for the convenience of subclasses)
-
-    # Helper method to prep compiler in subclass compile() methods
-
-    def _setup_compile(self, outdir, macros, incdirs, sources, depends,
-                       extra):
-        """Process arguments and decide which source files to compile."""
-        if outdir is None:
-            outdir = self.output_dir
-        elif not isinstance(outdir, str):
-            raise TypeError("'output_dir' must be a string or None")
-
-        if macros is None:
-            macros = self.macros
-        elif isinstance(macros, list):
-            macros = macros + (self.macros or [])
-        else:
-            raise TypeError("'macros' (if supplied) must be a list of tuples")
-
-        if incdirs is None:
-            incdirs = self.include_dirs
-        elif isinstance(incdirs, (list, tuple)):
-            incdirs = list(incdirs) + (self.include_dirs or [])
-        else:
-            raise TypeError(
-                  "'include_dirs' (if supplied) must be a list of strings")
-
-        if extra is None:
-            extra = []
-
-        # Get the list of expected output (object) files
-        objects = self.object_filenames(sources, strip_dir=0,
-                                        output_dir=outdir)
-        assert len(objects) == len(sources)
-
-        pp_opts = gen_preprocess_options(macros, incdirs)
-
-        build = {}
-        for i in range(len(sources)):
-            src = sources[i]
-            obj = objects[i]
-            ext = os.path.splitext(src)[1]
-            self.mkpath(os.path.dirname(obj))
-            build[obj] = (src, ext)
-
-        return macros, objects, extra, pp_opts, build
-
-    def _get_cc_args(self, pp_opts, debug, before):
-        # works for unixccompiler, cygwinccompiler
-        cc_args = pp_opts + ['-c']
-        if debug:
-            cc_args[:0] = ['-g']
-        if before:
-            cc_args[:0] = before
-        return cc_args
-
-    def _fix_compile_args(self, output_dir, macros, include_dirs):
-        """Typecheck and fix-up some of the arguments to the 'compile()'
-        method, and return fixed-up values.  Specifically: if 'output_dir'
-        is None, replaces it with 'self.output_dir'; ensures that 'macros'
-        is a list, and augments it with 'self.macros'; ensures that
-        'include_dirs' is a list, and augments it with 'self.include_dirs'.
-        Guarantees that the returned values are of the correct type,
-        i.e. for 'output_dir' either string or None, and for 'macros' and
-        'include_dirs' either list or None.
-        """
-        if output_dir is None:
-            output_dir = self.output_dir
-        elif not isinstance(output_dir, str):
-            raise TypeError("'output_dir' must be a string or None")
-
-        if macros is None:
-            macros = self.macros
-        elif isinstance(macros, list):
-            macros = macros + (self.macros or [])
-        else:
-            raise TypeError("'macros' (if supplied) must be a list of tuples")
-
-        if include_dirs is None:
-            include_dirs = self.include_dirs
-        elif isinstance(include_dirs, (list, tuple)):
-            include_dirs = list(include_dirs) + (self.include_dirs or [])
-        else:
-            raise TypeError(
-                  "'include_dirs' (if supplied) must be a list of strings")
-
-        return output_dir, macros, include_dirs
-
-    def _prep_compile(self, sources, output_dir, depends=None):
-        """Decide which source files must be recompiled.
-
-        Determine the list of object files corresponding to 'sources',
-        and figure out which ones really need to be recompiled.
-        Return a list of all object files and a dictionary telling
-        which source files can be skipped.
-        """
-        # Get the list of expected output (object) files
-        objects = self.object_filenames(sources, output_dir=output_dir)
-        assert len(objects) == len(sources)
-
-        # Return an empty dict for the "which source files can be skipped"
-        # return value to preserve API compatibility.
-        return objects, {}
-
-    def _fix_object_args(self, objects, output_dir):
-        """Typecheck and fix up some arguments supplied to various methods.
-        Specifically: ensure that 'objects' is a list; if output_dir is
-        None, replace with self.output_dir.  Return fixed versions of
-        'objects' and 'output_dir'.
-        """
-        if not isinstance(objects, (list, tuple)):
-            raise TypeError("'objects' must be a list or tuple of strings")
-        objects = list(objects)
-
-        if output_dir is None:
-            output_dir = self.output_dir
-        elif not isinstance(output_dir, str):
-            raise TypeError("'output_dir' must be a string or None")
-
-        return (objects, output_dir)
-
-    def _fix_lib_args(self, libraries, library_dirs, runtime_library_dirs):
-        """Typecheck and fix up some of the arguments supplied to the
-        'link_*' methods.  Specifically: ensure that all arguments are
-        lists, and augment them with their permanent versions
-        (eg. 'self.libraries' augments 'libraries').  Return a tuple with
-        fixed versions of all arguments.
-        """
-        if libraries is None:
-            libraries = self.libraries
-        elif isinstance(libraries, (list, tuple)):
-            libraries = list (libraries) + (self.libraries or [])
-        else:
-            raise TypeError(
-                  "'libraries' (if supplied) must be a list of strings")
-
-        if library_dirs is None:
-            library_dirs = self.library_dirs
-        elif isinstance(library_dirs, (list, tuple)):
-            library_dirs = list (library_dirs) + (self.library_dirs or [])
-        else:
-            raise TypeError(
-                  "'library_dirs' (if supplied) must be a list of strings")
-
-        if runtime_library_dirs is None:
-            runtime_library_dirs = self.runtime_library_dirs
-        elif isinstance(runtime_library_dirs, (list, tuple)):
-            runtime_library_dirs = (list(runtime_library_dirs) +
-                                    (self.runtime_library_dirs or []))
-        else:
-            raise TypeError("'runtime_library_dirs' (if supplied) "
-                            "must be a list of strings")
-
-        return (libraries, library_dirs, runtime_library_dirs)
-
-    def _need_link(self, objects, output_file):
-        """Return true if we need to relink the files listed in 'objects'
-        to recreate 'output_file'.
-        """
-        if self.force:
-            return True
-        else:
-            if self.dry_run:
-                newer = newer_group (objects, output_file, missing='newer')
-            else:
-                newer = newer_group (objects, output_file)
-            return newer
-
-    def detect_language(self, sources):
-        """Detect the language of a given file, or list of files. Uses
-        language_map, and language_order to do the job.
-        """
-        if not isinstance(sources, list):
-            sources = [sources]
-        lang = None
-        index = len(self.language_order)
-        for source in sources:
-            base, ext = os.path.splitext(source)
-            extlang = self.language_map.get(ext)
-            try:
-                extindex = self.language_order.index(extlang)
-                if extindex < index:
-                    lang = extlang
-                    index = extindex
-            except ValueError:
-                pass
-        return lang
-
-
-    # -- Worker methods ------------------------------------------------
-    # (must be implemented by subclasses)
-
-    def preprocess(self, source, output_file=None, macros=None,
-                   include_dirs=None, extra_preargs=None, extra_postargs=None):
-        """Preprocess a single C/C++ source file, named in 'source'.
-        Output will be written to file named 'output_file', or stdout if
-        'output_file' not supplied.  'macros' is a list of macro
-        definitions as for 'compile()', which will augment the macros set
-        with 'define_macro()' and 'undefine_macro()'.  'include_dirs' is a
-        list of directory names that will be added to the default list.
-
-        Raises PreprocessError on failure.
-        """
-        pass
-
-    def compile(self, sources, output_dir=None, macros=None,
-                include_dirs=None, debug=0, extra_preargs=None,
-                extra_postargs=None, depends=None):
-        """Compile one or more source files.
-
-        'sources' must be a list of filenames, most likely C/C++
-        files, but in reality anything that can be handled by a
-        particular compiler and compiler class (eg. MSVCCompiler can
-        handle resource files in 'sources').  Return a list of object
-        filenames, one per source filename in 'sources'.  Depending on
-        the implementation, not all source files will necessarily be
-        compiled, but all corresponding object filenames will be
-        returned.
-
-        If 'output_dir' is given, object files will be put under it, while
-        retaining their original path component.  That is, "foo/bar.c"
-        normally compiles to "foo/bar.o" (for a Unix implementation); if
-        'output_dir' is "build", then it would compile to
-        "build/foo/bar.o".
-
-        'macros', if given, must be a list of macro definitions.  A macro
-        definition is either a (name, value) 2-tuple or a (name,) 1-tuple.
-        The former defines a macro; if the value is None, the macro is
-        defined without an explicit value.  The 1-tuple case undefines a
-        macro.  Later definitions/redefinitions/ undefinitions take
-        precedence.
-
-        'include_dirs', if given, must be a list of strings, the
-        directories to add to the default include file search path for this
-        compilation only.
-
-        'debug' is a boolean; if true, the compiler will be instructed to
-        output debug symbols in (or alongside) the object file(s).
-
-        'extra_preargs' and 'extra_postargs' are implementation- dependent.
-        On platforms that have the notion of a command-line (e.g. Unix,
-        DOS/Windows), they are most likely lists of strings: extra
-        command-line arguments to prepend/append to the compiler command
-        line.  On other platforms, consult the implementation class
-        documentation.  In any event, they are intended as an escape hatch
-        for those occasions when the abstract compiler framework doesn't
-        cut the mustard.
-
-        'depends', if given, is a list of filenames that all targets
-        depend on.  If a source file is older than any file in
-        depends, then the source file will be recompiled.  This
-        supports dependency tracking, but only at a coarse
-        granularity.
-
-        Raises CompileError on failure.
-        """
-        # A concrete compiler class can either override this method
-        # entirely or implement _compile().
-        macros, objects, extra_postargs, pp_opts, build = \
-                self._setup_compile(output_dir, macros, include_dirs, sources,
-                                    depends, extra_postargs)
-        cc_args = self._get_cc_args(pp_opts, debug, extra_preargs)
-
-        for obj in objects:
-            try:
-                src, ext = build[obj]
-            except KeyError:
-                continue
-            self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
-
-        # Return *all* object filenames, not just the ones we just built.
-        return objects
-
-    def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
-        """Compile 'src' to product 'obj'."""
-        # A concrete compiler class that does not override compile()
-        # should implement _compile().
-        pass
-
-    def create_static_lib(self, objects, output_libname, output_dir=None,
-                          debug=0, target_lang=None):
-        """Link a bunch of stuff together to create a static library file.
-        The "bunch of stuff" consists of the list of object files supplied
-        as 'objects', the extra object files supplied to
-        'add_link_object()' and/or 'set_link_objects()', the libraries
-        supplied to 'add_library()' and/or 'set_libraries()', and the
-        libraries supplied as 'libraries' (if any).
-
-        'output_libname' should be a library name, not a filename; the
-        filename will be inferred from the library name.  'output_dir' is
-        the directory where the library file will be put.
-
-        'debug' is a boolean; if true, debugging information will be
-        included in the library (note that on most platforms, it is the
-        compile step where this matters: the 'debug' flag is included here
-        just for consistency).
-
-        'target_lang' is the target language for which the given objects
-        are being compiled. This allows specific linkage time treatment of
-        certain languages.
-
-        Raises LibError on failure.
-        """
-        pass
-
-
-    # values for target_desc parameter in link()
-    SHARED_OBJECT = "shared_object"
-    SHARED_LIBRARY = "shared_library"
-    EXECUTABLE = "executable"
-
-    def link(self,
-             target_desc,
-             objects,
-             output_filename,
-             output_dir=None,
-             libraries=None,
-             library_dirs=None,
-             runtime_library_dirs=None,
-             export_symbols=None,
-             debug=0,
-             extra_preargs=None,
-             extra_postargs=None,
-             build_temp=None,
-             target_lang=None):
-        """Link a bunch of stuff together to create an executable or
-        shared library file.
-
-        The "bunch of stuff" consists of the list of object files supplied
-        as 'objects'.  'output_filename' should be a filename.  If
-        'output_dir' is supplied, 'output_filename' is relative to it
-        (i.e. 'output_filename' can provide directory components if
-        needed).
-
-        'libraries' is a list of libraries to link against.  These are
-        library names, not filenames, since they're translated into
-        filenames in a platform-specific way (eg. "foo" becomes "libfoo.a"
-        on Unix and "foo.lib" on DOS/Windows).  However, they can include a
-        directory component, which means the linker will look in that
-        specific directory rather than searching all the normal locations.
-
-        'library_dirs', if supplied, should be a list of directories to
-        search for libraries that were specified as bare library names
-        (ie. no directory component).  These are on top of the system
-        default and those supplied to 'add_library_dir()' and/or
-        'set_library_dirs()'.  'runtime_library_dirs' is a list of
-        directories that will be embedded into the shared library and used
-        to search for other shared libraries that *it* depends on at
-        run-time.  (This may only be relevant on Unix.)
-
-        'export_symbols' is a list of symbols that the shared library will
-        export.  (This appears to be relevant only on Windows.)
-
-        'debug' is as for 'compile()' and 'create_static_lib()', with the
-        slight distinction that it actually matters on most platforms (as
-        opposed to 'create_static_lib()', which includes a 'debug' flag
-        mostly for form's sake).
-
-        'extra_preargs' and 'extra_postargs' are as for 'compile()' (except
-        of course that they supply command-line arguments for the
-        particular linker being used).
-
-        'target_lang' is the target language for which the given objects
-        are being compiled. This allows specific linkage time treatment of
-        certain languages.
-
-        Raises LinkError on failure.
-        """
-        raise NotImplementedError
-
-
-    # Old 'link_*()' methods, rewritten to use the new 'link()' method.
-
-    def link_shared_lib(self,
-                        objects,
-                        output_libname,
-                        output_dir=None,
-                        libraries=None,
-                        library_dirs=None,
-                        runtime_library_dirs=None,
-                        export_symbols=None,
-                        debug=0,
-                        extra_preargs=None,
-                        extra_postargs=None,
-                        build_temp=None,
-                        target_lang=None):
-        self.link(CCompiler.SHARED_LIBRARY, objects,
-                  self.library_filename(output_libname, lib_type='shared'),
-                  output_dir,
-                  libraries, library_dirs, runtime_library_dirs,
-                  export_symbols, debug,
-                  extra_preargs, extra_postargs, build_temp, target_lang)
-
-
-    def link_shared_object(self,
-                           objects,
-                           output_filename,
-                           output_dir=None,
-                           libraries=None,
-                           library_dirs=None,
-                           runtime_library_dirs=None,
-                           export_symbols=None,
-                           debug=0,
-                           extra_preargs=None,
-                           extra_postargs=None,
-                           build_temp=None,
-                           target_lang=None):
-        self.link(CCompiler.SHARED_OBJECT, objects,
-                  output_filename, output_dir,
-                  libraries, library_dirs, runtime_library_dirs,
-                  export_symbols, debug,
-                  extra_preargs, extra_postargs, build_temp, target_lang)
-
-
-    def link_executable(self,
-                        objects,
-                        output_progname,
-                        output_dir=None,
-                        libraries=None,
-                        library_dirs=None,
-                        runtime_library_dirs=None,
-                        debug=0,
-                        extra_preargs=None,
-                        extra_postargs=None,
-                        target_lang=None):
-        self.link(CCompiler.EXECUTABLE, objects,
-                  self.executable_filename(output_progname), output_dir,
-                  libraries, library_dirs, runtime_library_dirs, None,
-                  debug, extra_preargs, extra_postargs, None, target_lang)
-
-
-    # -- Miscellaneous methods -----------------------------------------
-    # These are all used by the 'gen_lib_options() function; there is
-    # no appropriate default implementation so subclasses should
-    # implement all of these.
-
-    def library_dir_option(self, dir):
-        """Return the compiler option to add 'dir' to the list of
-        directories searched for libraries.
-        """
-        raise NotImplementedError
-
-    def runtime_library_dir_option(self, dir):
-        """Return the compiler option to add 'dir' to the list of
-        directories searched for runtime libraries.
-        """
-        raise NotImplementedError
-
-    def library_option(self, lib):
-        """Return the compiler option to add 'lib' to the list of libraries
-        linked into the shared library or executable.
-        """
-        raise NotImplementedError
-
-    def has_function(self, funcname, includes=None, include_dirs=None,
-                     libraries=None, library_dirs=None):
-        """Return a boolean indicating whether funcname is supported on
-        the current platform.  The optional arguments can be used to
-        augment the compilation environment.
-        """
-        # this can't be included at module scope because it tries to
-        # import math which might not be available at that point - maybe
-        # the necessary logic should just be inlined?
-        import tempfile
-        if includes is None:
-            includes = []
-        if include_dirs is None:
-            include_dirs = []
-        if libraries is None:
-            libraries = []
-        if library_dirs is None:
-            library_dirs = []
-        fd, fname = tempfile.mkstemp(".c", funcname, text=True)
-        f = os.fdopen(fd, "w")
-        try:
-            for incl in includes:
-                f.write("""#include "%s"\n""" % incl)
-            f.write("""\
-int main (int argc, char **argv) {
-    %s();
-    return 0;
-}
-""" % funcname)
-        finally:
-            f.close()
-        try:
-            objects = self.compile([fname], include_dirs=include_dirs)
-        except CompileError:
-            return False
-
-        try:
-            self.link_executable(objects, "a.out",
-                                 libraries=libraries,
-                                 library_dirs=library_dirs)
-        except (LinkError, TypeError):
-            return False
-        return True
-
-    def find_library_file (self, dirs, lib, debug=0):
-        """Search the specified list of directories for a static or shared
-        library file 'lib' and return the full path to that file.  If
-        'debug' true, look for a debugging version (if that makes sense on
-        the current platform).  Return None if 'lib' wasn't found in any of
-        the specified directories.
-        """
-        raise NotImplementedError
-
-    # -- Filename generation methods -----------------------------------
-
-    # The default implementation of the filename generating methods are
-    # prejudiced towards the Unix/DOS/Windows view of the world:
-    #   * object files are named by replacing the source file extension
-    #     (eg. .c/.cpp -> .o/.obj)
-    #   * library files (shared or static) are named by plugging the
-    #     library name and extension into a format string, eg.
-    #     "lib%s.%s" % (lib_name, ".a") for Unix static libraries
-    #   * executables are named by appending an extension (possibly
-    #     empty) to the program name: eg. progname + ".exe" for
-    #     Windows
-    #
-    # To reduce redundant code, these methods expect to find
-    # several attributes in the current object (presumably defined
-    # as class attributes):
-    #   * src_extensions -
-    #     list of C/C++ source file extensions, eg. ['.c', '.cpp']
-    #   * obj_extension -
-    #     object file extension, eg. '.o' or '.obj'
-    #   * static_lib_extension -
-    #     extension for static library files, eg. '.a' or '.lib'
-    #   * shared_lib_extension -
-    #     extension for shared library/object files, eg. '.so', '.dll'
-    #   * static_lib_format -
-    #     format string for generating static library filenames,
-    #     eg. 'lib%s.%s' or '%s.%s'
-    #   * shared_lib_format
-    #     format string for generating shared library filenames
-    #     (probably same as static_lib_format, since the extension
-    #     is one of the intended parameters to the format string)
-    #   * exe_extension -
-    #     extension for executable files, eg. '' or '.exe'
-
-    def object_filenames(self, source_filenames, strip_dir=0, output_dir=''):
-        if output_dir is None:
-            output_dir = ''
-        obj_names = []
-        for src_name in source_filenames:
-            base, ext = os.path.splitext(src_name)
-            base = os.path.splitdrive(base)[1] # Chop off the drive
-            base = base[os.path.isabs(base):]  # If abs, chop off leading /
-            if ext not in self.src_extensions:
-                raise UnknownFileError(
-                      "unknown file type '%s' (from '%s')" % (ext, src_name))
-            if strip_dir:
-                base = os.path.basename(base)
-            obj_names.append(os.path.join(output_dir,
-                                          base + self.obj_extension))
-        return obj_names
-
-    def shared_object_filename(self, basename, strip_dir=0, output_dir=''):
-        assert output_dir is not None
-        if strip_dir:
-            basename = os.path.basename(basename)
-        return os.path.join(output_dir, basename + self.shared_lib_extension)
-
-    def executable_filename(self, basename, strip_dir=0, output_dir=''):
-        assert output_dir is not None
-        if strip_dir:
-            basename = os.path.basename(basename)
-        return os.path.join(output_dir, basename + (self.exe_extension or ''))
-
-    def library_filename(self, libname, lib_type='static',     # or 'shared'
-                         strip_dir=0, output_dir=''):
-        assert output_dir is not None
-        if lib_type not in ("static", "shared", "dylib", "xcode_stub"):
-            raise ValueError(
-                  "'lib_type' must be \"static\", \"shared\", \"dylib\", or \"xcode_stub\"")
-        fmt = getattr(self, lib_type + "_lib_format")
-        ext = getattr(self, lib_type + "_lib_extension")
-
-        dir, base = os.path.split(libname)
-        filename = fmt % (base, ext)
-        if strip_dir:
-            dir = ''
-
-        return os.path.join(output_dir, dir, filename)
-
-
-    # -- Utility methods -----------------------------------------------
-
-    def announce(self, msg, level=1):
-        log.debug(msg)
-
-    def debug_print(self, msg):
-        from distutils.debug import DEBUG
-        if DEBUG:
-            print(msg)
-
-    def warn(self, msg):
-        sys.stderr.write("warning: %s\n" % msg)
-
-    def execute(self, func, args, msg=None, level=1):
-        execute(func, args, msg, self.dry_run)
-
-    def spawn(self, cmd):
-        spawn(cmd, dry_run=self.dry_run)
-
-    def move_file(self, src, dst):
-        return move_file(src, dst, dry_run=self.dry_run)
-
-    def mkpath (self, name, mode=0o777):
-        mkpath(name, mode, dry_run=self.dry_run)
-
-
-# Map a sys.platform/os.name ('posix', 'nt') to the default compiler
-# type for that platform. Keys are interpreted as re match
-# patterns. Order is important; platform mappings are preferred over
-# OS names.
-_default_compilers = (
-
-    # Platform string mappings
-
-    # on a cygwin built python we can use gcc like an ordinary UNIXish
-    # compiler
-    ('cygwin.*', 'unix'),
-
-    # OS name mappings
-    ('posix', 'unix'),
-    ('nt', 'msvc'),
-
-    )
-
-def get_default_compiler(osname=None, platform=None):
-    """Determine the default compiler to use for the given platform.
-
-       osname should be one of the standard Python OS names (i.e. the
-       ones returned by os.name) and platform the common value
-       returned by sys.platform for the platform in question.
-
-       The default values are os.name and sys.platform in case the
-       parameters are not given.
-    """
-    if osname is None:
-        osname = os.name
-    if platform is None:
-        platform = sys.platform
-    for pattern, compiler in _default_compilers:
-        if re.match(pattern, platform) is not None or \
-           re.match(pattern, osname) is not None:
-            return compiler
-    # Default to Unix compiler
-    return 'unix'
-
-# Map compiler types to (module_name, class_name) pairs -- ie. where to
-# find the code that implements an interface to this compiler.  (The module
-# is assumed to be in the 'distutils' package.)
-compiler_class = { 'unix':    ('unixccompiler', 'UnixCCompiler',
-                               "standard UNIX-style compiler"),
-                   'msvc':    ('_msvccompiler', 'MSVCCompiler',
-                               "Microsoft Visual C++"),
-                   'cygwin':  ('cygwinccompiler', 'CygwinCCompiler',
-                               "Cygwin port of GNU C Compiler for Win32"),
-                   'mingw32': ('cygwinccompiler', 'Mingw32CCompiler',
-                               "Mingw32 port of GNU C Compiler for Win32"),
-                   'bcpp':    ('bcppcompiler', 'BCPPCompiler',
-                               "Borland C++ Compiler"),
-                 }
-
-def show_compilers():
-    """Print list of available compilers (used by the "--help-compiler"
-    options to "build", "build_ext", "build_clib").
-    """
-    # XXX this "knows" that the compiler option it's describing is
-    # "--compiler", which just happens to be the case for the three
-    # commands that use it.
-    from distutils.fancy_getopt import FancyGetopt
-    compilers = []
-    for compiler in compiler_class.keys():
-        compilers.append(("compiler="+compiler, None,
-                          compiler_class[compiler][2]))
-    compilers.sort()
-    pretty_printer = FancyGetopt(compilers)
-    pretty_printer.print_help("List of available compilers:")
-
-
-def new_compiler(plat=None, compiler=None, verbose=0, dry_run=0, force=0):
-    """Generate an instance of some CCompiler subclass for the supplied
-    platform/compiler combination.  'plat' defaults to 'os.name'
-    (eg. 'posix', 'nt'), and 'compiler' defaults to the default compiler
-    for that platform.  Currently only 'posix' and 'nt' are supported, and
-    the default compilers are "traditional Unix interface" (UnixCCompiler
-    class) and Visual C++ (MSVCCompiler class).  Note that it's perfectly
-    possible to ask for a Unix compiler object under Windows, and a
-    Microsoft compiler object under Unix -- if you supply a value for
-    'compiler', 'plat' is ignored.
-    """
-    if plat is None:
-        plat = os.name
-
-    try:
-        if compiler is None:
-            compiler = get_default_compiler(plat)
-
-        (module_name, class_name, long_description) = compiler_class[compiler]
-    except KeyError:
-        msg = "don't know how to compile C/C++ code on platform '%s'" % plat
-        if compiler is not None:
-            msg = msg + " with '%s' compiler" % compiler
-        raise DistutilsPlatformError(msg)
-
-    try:
-        module_name = "distutils." + module_name
-        __import__ (module_name)
-        module = sys.modules[module_name]
-        klass = vars(module)[class_name]
-    except ImportError:
-        raise DistutilsModuleError(
-              "can't compile C/C++ code: unable to load module '%s'" % \
-              module_name)
-    except KeyError:
-        raise DistutilsModuleError(
-               "can't compile C/C++ code: unable to find class '%s' "
-               "in module '%s'" % (class_name, module_name))
-
-    # XXX The None is necessary to preserve backwards compatibility
-    # with classes that expect verbose to be the first positional
-    # argument.
-    return klass(None, dry_run, force)
-
-
-def gen_preprocess_options(macros, include_dirs):
-    """Generate C pre-processor options (-D, -U, -I) as used by at least
-    two types of compilers: the typical Unix compiler and Visual C++.
-    'macros' is the usual thing, a list of 1- or 2-tuples, where (name,)
-    means undefine (-U) macro 'name', and (name,value) means define (-D)
-    macro 'name' to 'value'.  'include_dirs' is just a list of directory
-    names to be added to the header file search path (-I).  Returns a list
-    of command-line options suitable for either Unix compilers or Visual
-    C++.
-    """
-    # XXX it would be nice (mainly aesthetic, and so we don't generate
-    # stupid-looking command lines) to go over 'macros' and eliminate
-    # redundant definitions/undefinitions (ie. ensure that only the
-    # latest mention of a particular macro winds up on the command
-    # line).  I don't think it's essential, though, since most (all?)
-    # Unix C compilers only pay attention to the latest -D or -U
-    # mention of a macro on their command line.  Similar situation for
-    # 'include_dirs'.  I'm punting on both for now.  Anyways, weeding out
-    # redundancies like this should probably be the province of
-    # CCompiler, since the data structures used are inherited from it
-    # and therefore common to all CCompiler classes.
-    pp_opts = []
-    for macro in macros:
-        if not (isinstance(macro, tuple) and 1 <= len(macro) <= 2):
-            raise TypeError(
-                  "bad macro definition '%s': "
-                  "each element of 'macros' list must be a 1- or 2-tuple"
-                  % macro)
-
-        if len(macro) == 1:        # undefine this macro
-            pp_opts.append("-U%s" % macro[0])
-        elif len(macro) == 2:
-            if macro[1] is None:    # define with no explicit value
-                pp_opts.append("-D%s" % macro[0])
-            else:
-                # XXX *don't* need to be clever about quoting the
-                # macro value here, because we're going to avoid the
-                # shell at all costs when we spawn the command!
-                pp_opts.append("-D%s=%s" % macro)
-
-    for dir in include_dirs:
-        pp_opts.append("-I%s" % dir)
-    return pp_opts
-
-
-def gen_lib_options (compiler, library_dirs, runtime_library_dirs, libraries):
-    """Generate linker options for searching library directories and
-    linking with specific libraries.  'libraries' and 'library_dirs' are,
-    respectively, lists of library names (not filenames!) and search
-    directories.  Returns a list of command-line options suitable for use
-    with some compiler (depending on the two format strings passed in).
-    """
-    lib_opts = []
-
-    for dir in library_dirs:
-        lib_opts.append(compiler.library_dir_option(dir))
-
-    for dir in runtime_library_dirs:
-        opt = compiler.runtime_library_dir_option(dir)
-        if isinstance(opt, list):
-            lib_opts = lib_opts + opt
-        else:
-            lib_opts.append(opt)
-
-    # XXX it's important that we *not* remove redundant library mentions!
-    # sometimes you really do have to say "-lfoo -lbar -lfoo" in order to
-    # resolve all symbols.  I just hope we never have to say "-lfoo obj.o
-    # -lbar" to get things to work -- that's certainly a possibility, but a
-    # pretty nasty way to arrange your C code.
-
-    for lib in libraries:
-        (lib_dir, lib_name) = os.path.split(lib)
-        if lib_dir:
-            lib_file = compiler.find_library_file([lib_dir], lib_name)
-            if lib_file:
-                lib_opts.append(lib_file)
-            else:
-                compiler.warn("no library file corresponding to "
-                              "'%s' found (skipping)" % lib)
-        else:
-            lib_opts.append(compiler.library_option (lib))
-    return lib_opts
diff --git a/contrib/tools/python3/src/Lib/distutils/cmd.py b/contrib/tools/python3/src/Lib/distutils/cmd.py
deleted file mode 100644
index dba3191e58..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/cmd.py
+++ /dev/null
@@ -1,403 +0,0 @@
-"""distutils.cmd
-
-Provides the Command class, the base class for the command classes
-in the distutils.command package.
-"""
-
-import sys, os, re
-from distutils.errors import DistutilsOptionError
-from distutils import util, dir_util, file_util, archive_util, dep_util
-from distutils import log
-
-class Command:
-    """Abstract base class for defining command classes, the "worker bees"
-    of the Distutils.  A useful analogy for command classes is to think of
-    them as subroutines with local variables called "options".  The options
-    are "declared" in 'initialize_options()' and "defined" (given their
-    final values, aka "finalized") in 'finalize_options()', both of which
-    must be defined by every command class.  The distinction between the
-    two is necessary because option values might come from the outside
-    world (command line, config file, ...), and any options dependent on
-    other options must be computed *after* these outside influences have
-    been processed -- hence 'finalize_options()'.  The "body" of the
-    subroutine, where it does all its work based on the values of its
-    options, is the 'run()' method, which must also be implemented by every
-    command class.
-    """
-
-    # 'sub_commands' formalizes the notion of a "family" of commands,
-    # eg. "install" as the parent with sub-commands "install_lib",
-    # "install_headers", etc.  The parent of a family of commands
-    # defines 'sub_commands' as a class attribute; it's a list of
-    #    (command_name : string, predicate : unbound_method | string | None)
-    # tuples, where 'predicate' is a method of the parent command that
-    # determines whether the corresponding command is applicable in the
-    # current situation.  (Eg. we "install_headers" is only applicable if
-    # we have any C header files to install.)  If 'predicate' is None,
-    # that command is always applicable.
-    #
-    # 'sub_commands' is usually defined at the *end* of a class, because
-    # predicates can be unbound methods, so they must already have been
-    # defined.  The canonical example is the "install" command.
-    sub_commands = []
-
-
-    # -- Creation/initialization methods -------------------------------
-
-    def __init__(self, dist):
-        """Create and initialize a new Command object.  Most importantly,
-        invokes the 'initialize_options()' method, which is the real
-        initializer and depends on the actual command being
-        instantiated.
-        """
-        # late import because of mutual dependence between these classes
-        from distutils.dist import Distribution
-
-        if not isinstance(dist, Distribution):
-            raise TypeError("dist must be a Distribution instance")
-        if self.__class__ is Command:
-            raise RuntimeError("Command is an abstract class")
-
-        self.distribution = dist
-        self.initialize_options()
-
-        # Per-command versions of the global flags, so that the user can
-        # customize Distutils' behaviour command-by-command and let some
-        # commands fall back on the Distribution's behaviour.  None means
-        # "not defined, check self.distribution's copy", while 0 or 1 mean
-        # false and true (duh).  Note that this means figuring out the real
-        # value of each flag is a touch complicated -- hence "self._dry_run"
-        # will be handled by __getattr__, below.
-        # XXX This needs to be fixed.
-        self._dry_run = None
-
-        # verbose is largely ignored, but needs to be set for
-        # backwards compatibility (I think)?
-        self.verbose = dist.verbose
-
-        # Some commands define a 'self.force' option to ignore file
-        # timestamps, but methods defined *here* assume that
-        # 'self.force' exists for all commands.  So define it here
-        # just to be safe.
-        self.force = None
-
-        # The 'help' flag is just used for command-line parsing, so
-        # none of that complicated bureaucracy is needed.
-        self.help = 0
-
-        # 'finalized' records whether or not 'finalize_options()' has been
-        # called.  'finalize_options()' itself should not pay attention to
-        # this flag: it is the business of 'ensure_finalized()', which
-        # always calls 'finalize_options()', to respect/update it.
-        self.finalized = 0
-
-    # XXX A more explicit way to customize dry_run would be better.
-    def __getattr__(self, attr):
-        if attr == 'dry_run':
-            myval = getattr(self, "_" + attr)
-            if myval is None:
-                return getattr(self.distribution, attr)
-            else:
-                return myval
-        else:
-            raise AttributeError(attr)
-
-    def ensure_finalized(self):
-        if not self.finalized:
-            self.finalize_options()
-        self.finalized = 1
-
-    # Subclasses must define:
-    #   initialize_options()
-    #     provide default values for all options; may be customized by
-    #     setup script, by options from config file(s), or by command-line
-    #     options
-    #   finalize_options()
-    #     decide on the final values for all options; this is called
-    #     after all possible intervention from the outside world
-    #     (command-line, option file, etc.) has been processed
-    #   run()
-    #     run the command: do whatever it is we're here to do,
-    #     controlled by the command's various option values
-
-    def initialize_options(self):
-        """Set default values for all the options that this command
-        supports.  Note that these defaults may be overridden by other
-        commands, by the setup script, by config files, or by the
-        command-line.  Thus, this is not the place to code dependencies
-        between options; generally, 'initialize_options()' implementations
-        are just a bunch of "self.foo = None" assignments.
-
-        This method must be implemented by all command classes.
-        """
-        raise RuntimeError("abstract method -- subclass %s must override"
-                           % self.__class__)
-
-    def finalize_options(self):
-        """Set final values for all the options that this command supports.
-        This is always called as late as possible, ie.  after any option
-        assignments from the command-line or from other commands have been
-        done.  Thus, this is the place to code option dependencies: if
-        'foo' depends on 'bar', then it is safe to set 'foo' from 'bar' as
-        long as 'foo' still has the same value it was assigned in
-        'initialize_options()'.
-
-        This method must be implemented by all command classes.
-        """
-        raise RuntimeError("abstract method -- subclass %s must override"
-                           % self.__class__)
-
-
-    def dump_options(self, header=None, indent=""):
-        from distutils.fancy_getopt import longopt_xlate
-        if header is None:
-            header = "command options for '%s':" % self.get_command_name()
-        self.announce(indent + header, level=log.INFO)
-        indent = indent + "  "
-        for (option, _, _) in self.user_options:
-            option = option.translate(longopt_xlate)
-            if option[-1] == "=":
-                option = option[:-1]
-            value = getattr(self, option)
-            self.announce(indent + "%s = %s" % (option, value),
-                          level=log.INFO)
-
-    def run(self):
-        """A command's raison d'etre: carry out the action it exists to
-        perform, controlled by the options initialized in
-        'initialize_options()', customized by other commands, the setup
-        script, the command-line, and config files, and finalized in
-        'finalize_options()'.  All terminal output and filesystem
-        interaction should be done by 'run()'.
-
-        This method must be implemented by all command classes.
-        """
-        raise RuntimeError("abstract method -- subclass %s must override"
-                           % self.__class__)
-
-    def announce(self, msg, level=1):
-        """If the current verbosity level is of greater than or equal to
-        'level' print 'msg' to stdout.
-        """
-        log.log(level, msg)
-
-    def debug_print(self, msg):
-        """Print 'msg' to stdout if the global DEBUG (taken from the
-        DISTUTILS_DEBUG environment variable) flag is true.
-        """
-        from distutils.debug import DEBUG
-        if DEBUG:
-            print(msg)
-            sys.stdout.flush()
-
-
-    # -- Option validation methods -------------------------------------
-    # (these are very handy in writing the 'finalize_options()' method)
-    #
-    # NB. the general philosophy here is to ensure that a particular option
-    # value meets certain type and value constraints.  If not, we try to
-    # force it into conformance (eg. if we expect a list but have a string,
-    # split the string on comma and/or whitespace).  If we can't force the
-    # option into conformance, raise DistutilsOptionError.  Thus, command
-    # classes need do nothing more than (eg.)
-    #   self.ensure_string_list('foo')
-    # and they can be guaranteed that thereafter, self.foo will be
-    # a list of strings.
-
-    def _ensure_stringlike(self, option, what, default=None):
-        val = getattr(self, option)
-        if val is None:
-            setattr(self, option, default)
-            return default
-        elif not isinstance(val, str):
-            raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
-                                       % (option, what, val))
-        return val
-
-    def ensure_string(self, option, default=None):
-        """Ensure that 'option' is a string; if not defined, set it to
-        'default'.
-        """
-        self._ensure_stringlike(option, "string", default)
-
-    def ensure_string_list(self, option):
-        r"""Ensure that 'option' is a list of strings.  If 'option' is
-        currently a string, we split it either on /,\s*/ or /\s+/, so
-        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
-        ["foo", "bar", "baz"].
-        """
-        val = getattr(self, option)
-        if val is None:
-            return
-        elif isinstance(val, str):
-            setattr(self, option, re.split(r',\s*|\s+', val))
-        else:
-            if isinstance(val, list):
-                ok = all(isinstance(v, str) for v in val)
-            else:
-                ok = False
-            if not ok:
-                raise DistutilsOptionError(
-                      "'%s' must be a list of strings (got %r)"
-                      % (option, val))
-
-    def _ensure_tested_string(self, option, tester, what, error_fmt,
-                              default=None):
-        val = self._ensure_stringlike(option, what, default)
-        if val is not None and not tester(val):
-            raise DistutilsOptionError(("error in '%s' option: " + error_fmt)
-                                       % (option, val))
-
-    def ensure_filename(self, option):
-        """Ensure that 'option' is the name of an existing file."""
-        self._ensure_tested_string(option, os.path.isfile,
-                                   "filename",
-                                   "'%s' does not exist or is not a file")
-
-    def ensure_dirname(self, option):
-        self._ensure_tested_string(option, os.path.isdir,
-                                   "directory name",
-                                   "'%s' does not exist or is not a directory")
-
-
-    # -- Convenience methods for commands ------------------------------
-
-    def get_command_name(self):
-        if hasattr(self, 'command_name'):
-            return self.command_name
-        else:
-            return self.__class__.__name__
-
-    def set_undefined_options(self, src_cmd, *option_pairs):
-        """Set the values of any "undefined" options from corresponding
-        option values in some other command object.  "Undefined" here means
-        "is None", which is the convention used to indicate that an option
-        has not been changed between 'initialize_options()' and
-        'finalize_options()'.  Usually called from 'finalize_options()' for
-        options that depend on some other command rather than another
-        option of the same command.  'src_cmd' is the other command from
-        which option values will be taken (a command object will be created
-        for it if necessary); the remaining arguments are
-        '(src_option,dst_option)' tuples which mean "take the value of
-        'src_option' in the 'src_cmd' command object, and copy it to
-        'dst_option' in the current command object".
-        """
-        # Option_pairs: list of (src_option, dst_option) tuples
-        src_cmd_obj = self.distribution.get_command_obj(src_cmd)
-        src_cmd_obj.ensure_finalized()
-        for (src_option, dst_option) in option_pairs:
-            if getattr(self, dst_option) is None:
-                setattr(self, dst_option, getattr(src_cmd_obj, src_option))
-
-    def get_finalized_command(self, command, create=1):
-        """Wrapper around Distribution's 'get_command_obj()' method: find
-        (create if necessary and 'create' is true) the command object for
-        'command', call its 'ensure_finalized()' method, and return the
-        finalized command object.
-        """
-        cmd_obj = self.distribution.get_command_obj(command, create)
-        cmd_obj.ensure_finalized()
-        return cmd_obj
-
-    # XXX rename to 'get_reinitialized_command()'? (should do the
-    # same in dist.py, if so)
-    def reinitialize_command(self, command, reinit_subcommands=0):
-        return self.distribution.reinitialize_command(command,
-                                                      reinit_subcommands)
-
-    def run_command(self, command):
-        """Run some other command: uses the 'run_command()' method of
-        Distribution, which creates and finalizes the command object if
-        necessary and then invokes its 'run()' method.
-        """
-        self.distribution.run_command(command)
-
-    def get_sub_commands(self):
-        """Determine the sub-commands that are relevant in the current
-        distribution (ie., that need to be run).  This is based on the
-        'sub_commands' class attribute: each tuple in that list may include
-        a method that we call to determine if the subcommand needs to be
-        run for the current distribution.  Return a list of command names.
-        """
-        commands = []
-        for (cmd_name, method) in self.sub_commands:
-            if method is None or method(self):
-                commands.append(cmd_name)
-        return commands
-
-
-    # -- External world manipulation -----------------------------------
-
-    def warn(self, msg):
-        log.warn("warning: %s: %s\n", self.get_command_name(), msg)
-
-    def execute(self, func, args, msg=None, level=1):
-        util.execute(func, args, msg, dry_run=self.dry_run)
-
-    def mkpath(self, name, mode=0o777):
-        dir_util.mkpath(name, mode, dry_run=self.dry_run)
-
-    def copy_file(self, infile, outfile, preserve_mode=1, preserve_times=1,
-                  link=None, level=1):
-        """Copy a file respecting verbose, dry-run and force flags.  (The
-        former two default to whatever is in the Distribution object, and
-        the latter defaults to false for commands that don't define it.)"""
-        return file_util.copy_file(infile, outfile, preserve_mode,
-                                   preserve_times, not self.force, link,
-                                   dry_run=self.dry_run)
-
-    def copy_tree(self, infile, outfile, preserve_mode=1, preserve_times=1,
-                   preserve_symlinks=0, level=1):
-        """Copy an entire directory tree respecting verbose, dry-run,
-        and force flags.
-        """
-        return dir_util.copy_tree(infile, outfile, preserve_mode,
-                                  preserve_times, preserve_symlinks,
-                                  not self.force, dry_run=self.dry_run)
-
-    def move_file (self, src, dst, level=1):
-        """Move a file respecting dry-run flag."""
-        return file_util.move_file(src, dst, dry_run=self.dry_run)
-
-    def spawn(self, cmd, search_path=1, level=1):
-        """Spawn an external command respecting dry-run flag."""
-        from distutils.spawn import spawn
-        spawn(cmd, search_path, dry_run=self.dry_run)
-
-    def make_archive(self, base_name, format, root_dir=None, base_dir=None,
-                     owner=None, group=None):
-        return archive_util.make_archive(base_name, format, root_dir, base_dir,
-                                         dry_run=self.dry_run,
-                                         owner=owner, group=group)
-
-    def make_file(self, infiles, outfile, func, args,
-                  exec_msg=None, skip_msg=None, level=1):
-        """Special case of 'execute()' for operations that process one or
-        more input files and generate one output file.  Works just like
-        'execute()', except the operation is skipped and a different
-        message printed if 'outfile' already exists and is newer than all
-        files listed in 'infiles'.  If the command defined 'self.force',
-        and it is true, then the command is unconditionally run -- does no
-        timestamp checks.
-        """
-        if skip_msg is None:
-            skip_msg = "skipping %s (inputs unchanged)" % outfile
-
-        # Allow 'infiles' to be a single string
-        if isinstance(infiles, str):
-            infiles = (infiles,)
-        elif not isinstance(infiles, (list, tuple)):
-            raise TypeError(
-                  "'infiles' must be a string, or a list or tuple of strings")
-
-        if exec_msg is None:
-            exec_msg = "generating %s from %s" % (outfile, ', '.join(infiles))
-
-        # If 'outfile' must be regenerated (either because it doesn't
-        # exist, is out-of-date, or the 'force' flag is true) then
-        # perform the action that presumably regenerates it
-        if self.force or dep_util.newer_group(infiles, outfile):
-            self.execute(func, args, exec_msg, level)
-        # Otherwise, print the "skip" message
-        else:
-            log.debug(skip_msg)
diff --git a/contrib/tools/python3/src/Lib/distutils/command/__init__.py b/contrib/tools/python3/src/Lib/distutils/command/__init__.py
deleted file mode 100644
index fd0bfae7ad..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/__init__.py
+++ /dev/null
@@ -1,30 +0,0 @@
-"""distutils.command
-
-Package containing implementation of all the standard Distutils
-commands."""
-
-__all__ = ['build',
-           'build_py',
-           'build_ext',
-           'build_clib',
-           'build_scripts',
-           'clean',
-           'install',
-           'install_lib',
-           'install_headers',
-           'install_scripts',
-           'install_data',
-           'sdist',
-           'register',
-           'bdist',
-           'bdist_dumb',
-           'bdist_rpm',
-           'check',
-           'upload',
-           # These two are reserved for future use:
-           #'bdist_sdux',
-           #'bdist_pkgtool',
-           # Note:
-           # bdist_packager is not included because it only provides
-           # an abstract base class
-          ]
diff --git a/contrib/tools/python3/src/Lib/distutils/command/bdist.py b/contrib/tools/python3/src/Lib/distutils/command/bdist.py
deleted file mode 100644
index 60309e1ff2..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/bdist.py
+++ /dev/null
@@ -1,138 +0,0 @@
-"""distutils.command.bdist
-
-Implements the Distutils 'bdist' command (create a built [binary]
-distribution)."""
-
-import os
-from distutils.core import Command
-from distutils.errors import *
-from distutils.util import get_platform
-
-
-def show_formats():
-    """Print list of available formats (arguments to "--format" option).
-    """
-    from distutils.fancy_getopt import FancyGetopt
-    formats = []
-    for format in bdist.format_commands:
-        formats.append(("formats=" + format, None,
-                        bdist.format_command[format][1]))
-    pretty_printer = FancyGetopt(formats)
-    pretty_printer.print_help("List of available distribution formats:")
-
-
-class bdist(Command):
-
-    description = "create a built (binary) distribution"
-
-    user_options = [('bdist-base=', 'b',
-                     "temporary directory for creating built distributions"),
-                    ('plat-name=', 'p',
-                     "platform name to embed in generated filenames "
-                     "(default: %s)" % get_platform()),
-                    ('formats=', None,
-                     "formats for distribution (comma-separated list)"),
-                    ('dist-dir=', 'd',
-                     "directory to put final built distributions in "
-                     "[default: dist]"),
-                    ('skip-build', None,
-                     "skip rebuilding everything (for testing/debugging)"),
-                    ('owner=', 'u',
-                     "Owner name used when creating a tar file"
-                     " [default: current user]"),
-                    ('group=', 'g',
-                     "Group name used when creating a tar file"
-                     " [default: current group]"),
-                   ]
-
-    boolean_options = ['skip-build']
-
-    help_options = [
-        ('help-formats', None,
-         "lists available distribution formats", show_formats),
-        ]
-
-    # The following commands do not take a format option from bdist
-    no_format_option = ('bdist_rpm',)
-
-    # This won't do in reality: will need to distinguish RPM-ish Linux,
-    # Debian-ish Linux, Solaris, FreeBSD, ..., Windows, Mac OS.
-    default_format = {'posix': 'gztar',
-                      'nt': 'zip'}
-
-    # Establish the preferred order (for the --help-formats option).
-    format_commands = ['rpm', 'gztar', 'bztar', 'xztar', 'ztar', 'tar', 'zip']
-
-    # And the real information.
-    format_command = {'rpm':   ('bdist_rpm',  "RPM distribution"),
-                      'gztar': ('bdist_dumb', "gzip'ed tar file"),
-                      'bztar': ('bdist_dumb', "bzip2'ed tar file"),
-                      'xztar': ('bdist_dumb', "xz'ed tar file"),
-                      'ztar':  ('bdist_dumb', "compressed tar file"),
-                      'tar':   ('bdist_dumb', "tar file"),
-                      'zip':   ('bdist_dumb', "ZIP file"),
-                      }
-
-    def initialize_options(self):
-        self.bdist_base = None
-        self.plat_name = None
-        self.formats = None
-        self.dist_dir = None
-        self.skip_build = 0
-        self.group = None
-        self.owner = None
-
-    def finalize_options(self):
-        # have to finalize 'plat_name' before 'bdist_base'
-        if self.plat_name is None:
-            if self.skip_build:
-                self.plat_name = get_platform()
-            else:
-                self.plat_name = self.get_finalized_command('build').plat_name
-
-        # 'bdist_base' -- parent of per-built-distribution-format
-        # temporary directories (eg. we'll probably have
-        # "build/bdist.<plat>/dumb", "build/bdist.<plat>/rpm", etc.)
-        if self.bdist_base is None:
-            build_base = self.get_finalized_command('build').build_base
-            self.bdist_base = os.path.join(build_base,
-                                           'bdist.' + self.plat_name)
-
-        self.ensure_string_list('formats')
-        if self.formats is None:
-            try:
-                self.formats = [self.default_format[os.name]]
-            except KeyError:
-                raise DistutilsPlatformError(
-                      "don't know how to create built distributions "
-                      "on platform %s" % os.name)
-
-        if self.dist_dir is None:
-            self.dist_dir = "dist"
-
-    def run(self):
-        # Figure out which sub-commands we need to run.
-        commands = []
-        for format in self.formats:
-            try:
-                commands.append(self.format_command[format][0])
-            except KeyError:
-                raise DistutilsOptionError("invalid format '%s'" % format)
-
-        # Reinitialize and run each command.
-        for i in range(len(self.formats)):
-            cmd_name = commands[i]
-            sub_cmd = self.reinitialize_command(cmd_name)
-            if cmd_name not in self.no_format_option:
-                sub_cmd.format = self.formats[i]
-
-            # passing the owner and group names for tar archiving
-            if cmd_name == 'bdist_dumb':
-                sub_cmd.owner = self.owner
-                sub_cmd.group = self.group
-
-            # If we're going to need to run this command again, tell it to
-            # keep its temporary files around so subsequent runs go faster.
-            if cmd_name in commands[i+1:]:
-                sub_cmd.keep_temp = 1
-            self.run_command(cmd_name)
diff --git a/contrib/tools/python3/src/Lib/distutils/command/bdist_dumb.py b/contrib/tools/python3/src/Lib/distutils/command/bdist_dumb.py
deleted file mode 100644
index f0d6b5b8cd..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/bdist_dumb.py
+++ /dev/null
@@ -1,123 +0,0 @@
-"""distutils.command.bdist_dumb
-
-Implements the Distutils 'bdist_dumb' command (create a "dumb" built
-distribution -- i.e., just an archive to be unpacked under $prefix or
-$exec_prefix)."""
-
-import os
-from distutils.core import Command
-from distutils.util import get_platform
-from distutils.dir_util import remove_tree, ensure_relative
-from distutils.errors import *
-from distutils.sysconfig import get_python_version
-from distutils import log
-
-class bdist_dumb(Command):
-
-    description = "create a \"dumb\" built distribution"
-
-    user_options = [('bdist-dir=', 'd',
-                     "temporary directory for creating the distribution"),
-                    ('plat-name=', 'p',
-                     "platform name to embed in generated filenames "
-                     "(default: %s)" % get_platform()),
-                    ('format=', 'f',
-                     "archive format to create (tar, gztar, bztar, xztar, "
-                     "ztar, zip)"),
-                    ('keep-temp', 'k',
-                     "keep the pseudo-installation tree around after " +
-                     "creating the distribution archive"),
-                    ('dist-dir=', 'd',
-                     "directory to put final built distributions in"),
-                    ('skip-build', None,
-                     "skip rebuilding everything (for testing/debugging)"),
-                    ('relative', None,
-                     "build the archive using relative paths "
-                     "(default: false)"),
-                    ('owner=', 'u',
-                     "Owner name used when creating a tar file"
-                     " [default: current user]"),
-                    ('group=', 'g',
-                     "Group name used when creating a tar file"
-                     " [default: current group]"),
-                   ]
-
-    boolean_options = ['keep-temp', 'skip-build', 'relative']
-
-    default_format = { 'posix': 'gztar',
-                       'nt': 'zip' }
-
-    def initialize_options(self):
-        self.bdist_dir = None
-        self.plat_name = None
-        self.format = None
-        self.keep_temp = 0
-        self.dist_dir = None
-        self.skip_build = None
-        self.relative = 0
-        self.owner = None
-        self.group = None
-
-    def finalize_options(self):
-        if self.bdist_dir is None:
-            bdist_base = self.get_finalized_command('bdist').bdist_base
-            self.bdist_dir = os.path.join(bdist_base, 'dumb')
-
-        if self.format is None:
-            try:
-                self.format = self.default_format[os.name]
-            except KeyError:
-                raise DistutilsPlatformError(
-                       "don't know how to create dumb built distributions "
-                       "on platform %s" % os.name)
-
-        self.set_undefined_options('bdist',
-                                   ('dist_dir', 'dist_dir'),
-                                   ('plat_name', 'plat_name'),
-                                   ('skip_build', 'skip_build'))
-
-    def run(self):
-        if not self.skip_build:
-            self.run_command('build')
-
-        install = self.reinitialize_command('install', reinit_subcommands=1)
-        install.root = self.bdist_dir
-        install.skip_build = self.skip_build
-        install.warn_dir = 0
-
-        log.info("installing to %s", self.bdist_dir)
-        self.run_command('install')
-
-        # And make an archive relative to the root of the
-        # pseudo-installation tree.
-        archive_basename = "%s.%s" % (self.distribution.get_fullname(),
-                                      self.plat_name)
-
-        pseudoinstall_root = os.path.join(self.dist_dir, archive_basename)
-        if not self.relative:
-            archive_root = self.bdist_dir
-        else:
-            if (self.distribution.has_ext_modules() and
-                (install.install_base != install.install_platbase)):
-                raise DistutilsPlatformError(
-                       "can't make a dumb built distribution where "
-                       "base and platbase are different (%s, %s)"
-                       % (repr(install.install_base),
-                          repr(install.install_platbase)))
-            else:
-                archive_root = os.path.join(self.bdist_dir,
-                                   ensure_relative(install.install_base))
-
-        # Make the archive
-        filename = self.make_archive(pseudoinstall_root,
-                                     self.format, root_dir=archive_root,
-                                     owner=self.owner, group=self.group)
-        if self.distribution.has_ext_modules():
-            pyversion = get_python_version()
-        else:
-            pyversion = 'any'
-        self.distribution.dist_files.append(('bdist_dumb', pyversion,
-                                             filename))
-
-        if not self.keep_temp:
-            remove_tree(self.bdist_dir, dry_run=self.dry_run)
diff --git a/contrib/tools/python3/src/Lib/distutils/command/bdist_rpm.py b/contrib/tools/python3/src/Lib/distutils/command/bdist_rpm.py
deleted file mode 100644
index 550cbfa1e2..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/bdist_rpm.py
+++ /dev/null
@@ -1,579 +0,0 @@
-"""distutils.command.bdist_rpm
-
-Implements the Distutils 'bdist_rpm' command (create RPM source and binary
-distributions)."""
-
-import subprocess, sys, os
-from distutils.core import Command
-from distutils.debug import DEBUG
-from distutils.file_util import write_file
-from distutils.errors import *
-from distutils.sysconfig import get_python_version
-from distutils import log
-
-class bdist_rpm(Command):
-
-    description = "create an RPM distribution"
-
-    user_options = [
-        ('bdist-base=', None,
-         "base directory for creating built distributions"),
-        ('rpm-base=', None,
-         "base directory for creating RPMs (defaults to \"rpm\" under "
-         "--bdist-base; must be specified for RPM 2)"),
-        ('dist-dir=', 'd',
-         "directory to put final RPM files in "
-         "(and .spec files if --spec-only)"),
-        ('python=', None,
-         "path to Python interpreter to hard-code in the .spec file "
-         "(default: \"python\")"),
-        ('fix-python', None,
-         "hard-code the exact path to the current Python interpreter in "
-         "the .spec file"),
-        ('spec-only', None,
-         "only regenerate spec file"),
-        ('source-only', None,
-         "only generate source RPM"),
-        ('binary-only', None,
-         "only generate binary RPM"),
-        ('use-bzip2', None,
-         "use bzip2 instead of gzip to create source distribution"),
-
-        # More meta-data: too RPM-specific to put in the setup script,
-        # but needs to go in the .spec file -- so we make these options
-        # to "bdist_rpm".  The idea is that packagers would put this
-        # info in setup.cfg, although they are of course free to
-        # supply it on the command line.
-        ('distribution-name=', None,
-         "name of the (Linux) distribution to which this "
-         "RPM applies (*not* the name of the module distribution!)"),
-        ('group=', None,
-         "package classification [default: \"Development/Libraries\"]"),
-        ('release=', None,
-         "RPM release number"),
-        ('serial=', None,
-         "RPM serial number"),
-        ('vendor=', None,
-         "RPM \"vendor\" (eg. \"Joe Blow <joe@example.com>\") "
-         "[default: maintainer or author from setup script]"),
-        ('packager=', None,
-         "RPM packager (eg. \"Jane Doe <jane@example.net>\") "
-         "[default: vendor]"),
-        ('doc-files=', None,
-         "list of documentation files (space or comma-separated)"),
-        ('changelog=', None,
-         "RPM changelog"),
-        ('icon=', None,
-         "name of icon file"),
-        ('provides=', None,
-         "capabilities provided by this package"),
-        ('requires=', None,
-         "capabilities required by this package"),
-        ('conflicts=', None,
-         "capabilities which conflict with this package"),
-        ('build-requires=', None,
-         "capabilities required to build this package"),
-        ('obsoletes=', None,
-         "capabilities made obsolete by this package"),
-        ('no-autoreq', None,
-         "do not automatically calculate dependencies"),
-
-        # Actions to take when building RPM
-        ('keep-temp', 'k',
-         "don't clean up RPM build directory"),
-        ('no-keep-temp', None,
-         "clean up RPM build directory [default]"),
-        ('use-rpm-opt-flags', None,
-         "compile with RPM_OPT_FLAGS when building from source RPM"),
-        ('no-rpm-opt-flags', None,
-         "do not pass any RPM CFLAGS to compiler"),
-        ('rpm3-mode', None,
-         "RPM 3 compatibility mode (default)"),
-        ('rpm2-mode', None,
-         "RPM 2 compatibility mode"),
-
-        # Add the hooks necessary for specifying custom scripts
-        ('prep-script=', None,
-         "Specify a script for the PREP phase of RPM building"),
-        ('build-script=', None,
-         "Specify a script for the BUILD phase of RPM building"),
-
-        ('pre-install=', None,
-         "Specify a script for the pre-INSTALL phase of RPM building"),
-        ('install-script=', None,
-         "Specify a script for the INSTALL phase of RPM building"),
-        ('post-install=', None,
-         "Specify a script for the post-INSTALL phase of RPM building"),
-
-        ('pre-uninstall=', None,
-         "Specify a script for the pre-UNINSTALL phase of RPM building"),
-        ('post-uninstall=', None,
-         "Specify a script for the post-UNINSTALL phase of RPM building"),
-
-        ('clean-script=', None,
-         "Specify a script for the CLEAN phase of RPM building"),
-
-        ('verify-script=', None,
-         "Specify a script for the VERIFY phase of the RPM build"),
-
-        # Allow a packager to explicitly force an architecture
-        ('force-arch=', None,
-         "Force an architecture onto the RPM build process"),
-
-        ('quiet', 'q',
-         "Run the INSTALL phase of RPM building in quiet mode"),
-        ]
-
-    boolean_options = ['keep-temp', 'use-rpm-opt-flags', 'rpm3-mode',
-                       'no-autoreq', 'quiet']
-
-    negative_opt = {'no-keep-temp': 'keep-temp',
-                    'no-rpm-opt-flags': 'use-rpm-opt-flags',
-                    'rpm2-mode': 'rpm3-mode'}
-
-
-    def initialize_options(self):
-        self.bdist_base = None
-        self.rpm_base = None
-        self.dist_dir = None
-        self.python = None
-        self.fix_python = None
-        self.spec_only = None
-        self.binary_only = None
-        self.source_only = None
-        self.use_bzip2 = None
-
-        self.distribution_name = None
-        self.group = None
-        self.release = None
-        self.serial = None
-        self.vendor = None
-        self.packager = None
-        self.doc_files = None
-        self.changelog = None
-        self.icon = None
-
-        self.prep_script = None
-        self.build_script = None
-        self.install_script = None
-        self.clean_script = None
-        self.verify_script = None
-        self.pre_install = None
-        self.post_install = None
-        self.pre_uninstall = None
-        self.post_uninstall = None
-        self.prep = None
-        self.provides = None
-        self.requires = None
-        self.conflicts = None
-        self.build_requires = None
-        self.obsoletes = None
-
-        self.keep_temp = 0
-        self.use_rpm_opt_flags = 1
-        self.rpm3_mode = 1
-        self.no_autoreq = 0
-
-        self.force_arch = None
-        self.quiet = 0
-
-    def finalize_options(self):
-        self.set_undefined_options('bdist', ('bdist_base', 'bdist_base'))
-        if self.rpm_base is None:
-            if not self.rpm3_mode:
-                raise DistutilsOptionError(
-                      "you must specify --rpm-base in RPM 2 mode")
-            self.rpm_base = os.path.join(self.bdist_base, "rpm")
-
-        if self.python is None:
-            if self.fix_python:
-                self.python = sys.executable
-            else:
-                self.python = "python3"
-        elif self.fix_python:
-            raise DistutilsOptionError(
-                  "--python and --fix-python are mutually exclusive options")
-
-        if os.name != 'posix':
-            raise DistutilsPlatformError("don't know how to create RPM "
-                   "distributions on platform %s" % os.name)
-        if self.binary_only and self.source_only:
-            raise DistutilsOptionError(
-                  "cannot supply both '--source-only' and '--binary-only'")
-
-        # don't pass CFLAGS to pure python distributions
-        if not self.distribution.has_ext_modules():
-            self.use_rpm_opt_flags = 0
-
-        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
-        self.finalize_package_data()
-
-    def finalize_package_data(self):
-        self.ensure_string('group', "Development/Libraries")
-        self.ensure_string('vendor',
-                           "%s <%s>" % (self.distribution.get_contact(),
-                                        self.distribution.get_contact_email()))
-        self.ensure_string('packager')
-        self.ensure_string_list('doc_files')
-        if isinstance(self.doc_files, list):
-            for readme in ('README', 'README.txt'):
-                if os.path.exists(readme) and readme not in self.doc_files:
-                    self.doc_files.append(readme)
-
-        self.ensure_string('release', "1")
-        self.ensure_string('serial')   # should it be an int?
-
-        self.ensure_string('distribution_name')
-
-        self.ensure_string('changelog')
-          # Format changelog correctly
-        self.changelog = self._format_changelog(self.changelog)
-
-        self.ensure_filename('icon')
-
-        self.ensure_filename('prep_script')
-        self.ensure_filename('build_script')
-        self.ensure_filename('install_script')
-        self.ensure_filename('clean_script')
-        self.ensure_filename('verify_script')
-        self.ensure_filename('pre_install')
-        self.ensure_filename('post_install')
-        self.ensure_filename('pre_uninstall')
-        self.ensure_filename('post_uninstall')
-
-        # XXX don't forget we punted on summaries and descriptions -- they
-        # should be handled here eventually!
-
-        # Now *this* is some meta-data that belongs in the setup script...
-        self.ensure_string_list('provides')
-        self.ensure_string_list('requires')
-        self.ensure_string_list('conflicts')
-        self.ensure_string_list('build_requires')
-        self.ensure_string_list('obsoletes')
-
-        self.ensure_string('force_arch')
-
-    def run(self):
-        if DEBUG:
-            print("before _get_package_data():")
-            print("vendor =", self.vendor)
-            print("packager =", self.packager)
-            print("doc_files =", self.doc_files)
-            print("changelog =", self.changelog)
-
-        # make directories
-        if self.spec_only:
-            spec_dir = self.dist_dir
-            self.mkpath(spec_dir)
-        else:
-            rpm_dir = {}
-            for d in ('SOURCES', 'SPECS', 'BUILD', 'RPMS', 'SRPMS'):
-                rpm_dir[d] = os.path.join(self.rpm_base, d)
-                self.mkpath(rpm_dir[d])
-            spec_dir = rpm_dir['SPECS']
-
-        # Spec file goes into 'dist_dir' if '--spec-only specified',
-        # build/rpm.<plat> otherwise.
-        spec_path = os.path.join(spec_dir,
-                                 "%s.spec" % self.distribution.get_name())
-        self.execute(write_file,
-                     (spec_path,
-                      self._make_spec_file()),
-                     "writing '%s'" % spec_path)
-
-        if self.spec_only: # stop if requested
-            return
-
-        # Make a source distribution and copy to SOURCES directory with
-        # optional icon.
-        saved_dist_files = self.distribution.dist_files[:]
-        sdist = self.reinitialize_command('sdist')
-        if self.use_bzip2:
-            sdist.formats = ['bztar']
-        else:
-            sdist.formats = ['gztar']
-        self.run_command('sdist')
-        self.distribution.dist_files = saved_dist_files
-
-        source = sdist.get_archive_files()[0]
-        source_dir = rpm_dir['SOURCES']
-        self.copy_file(source, source_dir)
-
-        if self.icon:
-            if os.path.exists(self.icon):
-                self.copy_file(self.icon, source_dir)
-            else:
-                raise DistutilsFileError(
-                      "icon file '%s' does not exist" % self.icon)
-
-        # build package
-        log.info("building RPMs")
-        rpm_cmd = ['rpmbuild']
-
-        if self.source_only: # what kind of RPMs?
-            rpm_cmd.append('-bs')
-        elif self.binary_only:
-            rpm_cmd.append('-bb')
-        else:
-            rpm_cmd.append('-ba')
-        rpm_cmd.extend(['--define', '__python %s' % self.python])
-        if self.rpm3_mode:
-            rpm_cmd.extend(['--define',
-                             '_topdir %s' % os.path.abspath(self.rpm_base)])
-        if not self.keep_temp:
-            rpm_cmd.append('--clean')
-
-        if self.quiet:
-            rpm_cmd.append('--quiet')
-
-        rpm_cmd.append(spec_path)
-        # Determine the binary rpm names that should be built out of this spec
-        # file
-        # Note that some of these may not be really built (if the file
-        # list is empty)
-        nvr_string = "%{name}-%{version}-%{release}"
-        src_rpm = nvr_string + ".src.rpm"
-        non_src_rpm = "%{arch}/" + nvr_string + ".%{arch}.rpm"
-        q_cmd = r"rpm -q --qf '%s %s\n' --specfile '%s'" % (
-            src_rpm, non_src_rpm, spec_path)
-
-        out = os.popen(q_cmd)
-        try:
-            binary_rpms = []
-            source_rpm = None
-            while True:
-                line = out.readline()
-                if not line:
-                    break
-                l = line.strip().split()
-                assert(len(l) == 2)
-                binary_rpms.append(l[1])
-                # The source rpm is named after the first entry in the spec file
-                if source_rpm is None:
-                    source_rpm = l[0]
-
-            status = out.close()
-            if status:
-                raise DistutilsExecError("Failed to execute: %s" % repr(q_cmd))
-
-        finally:
-            out.close()
-
-        self.spawn(rpm_cmd)
-
-        if not self.dry_run:
-            if self.distribution.has_ext_modules():
-                pyversion = get_python_version()
-            else:
-                pyversion = 'any'
-
-            if not self.binary_only:
-                srpm = os.path.join(rpm_dir['SRPMS'], source_rpm)
-                assert(os.path.exists(srpm))
-                self.move_file(srpm, self.dist_dir)
-                filename = os.path.join(self.dist_dir, source_rpm)
-                self.distribution.dist_files.append(
-                    ('bdist_rpm', pyversion, filename))
-
-            if not self.source_only:
-                for rpm in binary_rpms:
-                    rpm = os.path.join(rpm_dir['RPMS'], rpm)
-                    if os.path.exists(rpm):
-                        self.move_file(rpm, self.dist_dir)
-                        filename = os.path.join(self.dist_dir,
-                                                os.path.basename(rpm))
-                        self.distribution.dist_files.append(
-                            ('bdist_rpm', pyversion, filename))
-
-    def _dist_path(self, path):
-        return os.path.join(self.dist_dir, os.path.basename(path))
-
-    def _make_spec_file(self):
-        """Generate the text of an RPM spec file and return it as a
-        list of strings (one per line).
-        """
-        # definitions and headers
-        spec_file = [
-            '%define name ' + self.distribution.get_name(),
-            '%define version ' + self.distribution.get_version().replace('-','_'),
-            '%define unmangled_version ' + self.distribution.get_version(),
-            '%define release ' + self.release.replace('-','_'),
-            '',
-            'Summary: ' + self.distribution.get_description(),
-            ]
-
-        # Workaround for #14443 which affects some RPM based systems such as
-        # RHEL6 (and probably derivatives)
-        vendor_hook = subprocess.getoutput('rpm --eval %{__os_install_post}')
-        # Generate a potential replacement value for __os_install_post (whilst
-        # normalizing the whitespace to simplify the test for whether the
-        # invocation of brp-python-bytecompile passes in __python):
-        vendor_hook = '\n'.join(['  %s \\' % line.strip()
-                                 for line in vendor_hook.splitlines()])
-        problem = "brp-python-bytecompile \\\n"
-        fixed = "brp-python-bytecompile %{__python} \\\n"
-        fixed_hook = vendor_hook.replace(problem, fixed)
-        if fixed_hook != vendor_hook:
-            spec_file.append('# Workaround for http://bugs.python.org/issue14443')
-            spec_file.append('%define __os_install_post ' + fixed_hook + '\n')
-
-        # put locale summaries into spec file
-        # XXX not supported for now (hard to put a dictionary
-        # in a config file -- arg!)
-        #for locale in self.summaries.keys():
-        #    spec_file.append('Summary(%s): %s' % (locale,
-        #                                          self.summaries[locale]))
-
-        spec_file.extend([
-            'Name: %{name}',
-            'Version: %{version}',
-            'Release: %{release}',])
-
-        # XXX yuck! this filename is available from the "sdist" command,
-        # but only after it has run: and we create the spec file before
-        # running "sdist", in case of --spec-only.
-        if self.use_bzip2:
-            spec_file.append('Source0: %{name}-%{unmangled_version}.tar.bz2')
-        else:
-            spec_file.append('Source0: %{name}-%{unmangled_version}.tar.gz')
-
-        spec_file.extend([
-            'License: ' + self.distribution.get_license(),
-            'Group: ' + self.group,
-            'BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-buildroot',
-            'Prefix: %{_prefix}', ])
-
-        if not self.force_arch:
-            # noarch if no extension modules
-            if not self.distribution.has_ext_modules():
-                spec_file.append('BuildArch: noarch')
-        else:
-            spec_file.append( 'BuildArch: %s' % self.force_arch )
-
-        for field in ('Vendor',
-                      'Packager',
-                      'Provides',
-                      'Requires',
-                      'Conflicts',
-                      'Obsoletes',
-                      ):
-            val = getattr(self, field.lower())
-            if isinstance(val, list):
-                spec_file.append('%s: %s' % (field, ' '.join(val)))
-            elif val is not None:
-                spec_file.append('%s: %s' % (field, val))
-
-
-        if self.distribution.get_url() != 'UNKNOWN':
-            spec_file.append('Url: ' + self.distribution.get_url())
-
-        if self.distribution_name:
-            spec_file.append('Distribution: ' + self.distribution_name)
-
-        if self.build_requires:
-            spec_file.append('BuildRequires: ' +
-                             ' '.join(self.build_requires))
-
-        if self.icon:
-            spec_file.append('Icon: ' + os.path.basename(self.icon))
-
-        if self.no_autoreq:
-            spec_file.append('AutoReq: 0')
-
-        spec_file.extend([
-            '',
-            '%description',
-            self.distribution.get_long_description()
-            ])
-
-        # put locale descriptions into spec file
-        # XXX again, suppressed because config file syntax doesn't
-        # easily support this ;-(
-        #for locale in self.descriptions.keys():
-        #    spec_file.extend([
-        #        '',
-        #        '%description -l ' + locale,
-        #        self.descriptions[locale],
-        #        ])
-
-        # rpm scripts
-        # figure out default build script
-        def_setup_call = "%s %s" % (self.python,os.path.basename(sys.argv[0]))
-        def_build = "%s build" % def_setup_call
-        if self.use_rpm_opt_flags:
-            def_build = 'env CFLAGS="$RPM_OPT_FLAGS" ' + def_build
-
-        # insert contents of files
-
-        # XXX this is kind of misleading: user-supplied options are files
-        # that we open and interpolate into the spec file, but the defaults
-        # are just text that we drop in as-is.  Hmmm.
-
-        install_cmd = ('%s install -O1 --root=$RPM_BUILD_ROOT '
-                       '--record=INSTALLED_FILES') % def_setup_call
-
-        script_options = [
-            ('prep', 'prep_script', "%setup -n %{name}-%{unmangled_version}"),
-            ('build', 'build_script', def_build),
-            ('install', 'install_script', install_cmd),
-            ('clean', 'clean_script', "rm -rf $RPM_BUILD_ROOT"),
-            ('verifyscript', 'verify_script', None),
-            ('pre', 'pre_install', None),
-            ('post', 'post_install', None),
-            ('preun', 'pre_uninstall', None),
-            ('postun', 'post_uninstall', None),
-        ]
-
-        for (rpm_opt, attr, default) in script_options:
-            # Insert contents of file referred to, if no file is referred to
-            # use 'default' as contents of script
-            val = getattr(self, attr)
-            if val or default:
-                spec_file.extend([
-                    '',
-                    '%' + rpm_opt,])
-                if val:
-                    with open(val) as f:
-                        spec_file.extend(f.read().split('\n'))
-                else:
-                    spec_file.append(default)
-
-
-        # files section
-        spec_file.extend([
-            '',
-            '%files -f INSTALLED_FILES',
-            '%defattr(-,root,root)',
-            ])
-
-        if self.doc_files:
-            spec_file.append('%doc ' + ' '.join(self.doc_files))
-
-        if self.changelog:
-            spec_file.extend([
-                '',
-                '%changelog',])
-            spec_file.extend(self.changelog)
-
-        return spec_file
-
-    def _format_changelog(self, changelog):
-        """Format the changelog correctly and convert it to a list of strings
-        """
-        if not changelog:
-            return changelog
-        new_changelog = []
-        for line in changelog.strip().split('\n'):
-            line = line.strip()
-            if line[0] == '*':
-                new_changelog.extend(['', line])
-            elif line[0] == '-':
-                new_changelog.append(line)
-            else:
-                new_changelog.append('  ' + line)
-
-        # strip trailing newline inserted by first changelog entry
-        if not new_changelog[0]:
-            del new_changelog[0]
-
-        return new_changelog
diff --git a/contrib/tools/python3/src/Lib/distutils/command/build.py b/contrib/tools/python3/src/Lib/distutils/command/build.py
deleted file mode 100644
index a86df0bc7f..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/build.py
+++ /dev/null
@@ -1,157 +0,0 @@
-"""distutils.command.build
-
-Implements the Distutils 'build' command."""
-
-import sys, os
-from distutils.core import Command
-from distutils.errors import DistutilsOptionError
-from distutils.util import get_platform
-
-
-def show_compilers():
-    from distutils.ccompiler import show_compilers
-    show_compilers()
-
-
-class build(Command):
-
-    description = "build everything needed to install"
-
-    user_options = [
-        ('build-base=', 'b',
-         "base directory for build library"),
-        ('build-purelib=', None,
-         "build directory for platform-neutral distributions"),
-        ('build-platlib=', None,
-         "build directory for platform-specific distributions"),
-        ('build-lib=', None,
-         "build directory for all distribution (defaults to either " +
-         "build-purelib or build-platlib"),
-        ('build-scripts=', None,
-         "build directory for scripts"),
-        ('build-temp=', 't',
-         "temporary build directory"),
-        ('plat-name=', 'p',
-         "platform name to build for, if supported "
-         "(default: %s)" % get_platform()),
-        ('compiler=', 'c',
-         "specify the compiler type"),
-        ('parallel=', 'j',
-         "number of parallel build jobs"),
-        ('debug', 'g',
-         "compile extensions and libraries with debugging information"),
-        ('force', 'f',
-         "forcibly build everything (ignore file timestamps)"),
-        ('executable=', 'e',
-         "specify final destination interpreter path (build.py)"),
-        ]
-
-    boolean_options = ['debug', 'force']
-
-    help_options = [
-        ('help-compiler', None,
-         "list available compilers", show_compilers),
-        ]
-
-    def initialize_options(self):
-        self.build_base = 'build'
-        # these are decided only after 'build_base' has its final value
-        # (unless overridden by the user or client)
-        self.build_purelib = None
-        self.build_platlib = None
-        self.build_lib = None
-        self.build_temp = None
-        self.build_scripts = None
-        self.compiler = None
-        self.plat_name = None
-        self.debug = None
-        self.force = 0
-        self.executable = None
-        self.parallel = None
-
-    def finalize_options(self):
-        if self.plat_name is None:
-            self.plat_name = get_platform()
-        else:
-            # plat-name only supported for windows (other platforms are
-            # supported via ./configure flags, if at all).  Avoid misleading
-            # other platforms.
-            if os.name != 'nt':
-                raise DistutilsOptionError(
-                            "--plat-name only supported on Windows (try "
-                            "using './configure --help' on your platform)")
-
-        plat_specifier = ".%s-%d.%d" % (self.plat_name, *sys.version_info[:2])
-
-        # Make it so Python 2.x and Python 2.x with --with-pydebug don't
-        # share the same build directories. Doing so confuses the build
-        # process for C modules
-        if hasattr(sys, 'gettotalrefcount'):
-            plat_specifier += '-pydebug'
-
-        # 'build_purelib' and 'build_platlib' just default to 'lib' and
-        # 'lib.<plat>' under the base build directory.  We only use one of
-        # them for a given distribution, though --
-        if self.build_purelib is None:
-            self.build_purelib = os.path.join(self.build_base, 'lib')
-        if self.build_platlib is None:
-            self.build_platlib = os.path.join(self.build_base,
-                                              'lib' + plat_specifier)
-
-        # 'build_lib' is the actual directory that we will use for this
-        # particular module distribution -- if user didn't supply it, pick
-        # one of 'build_purelib' or 'build_platlib'.
-        if self.build_lib is None:
-            if self.distribution.ext_modules:
-                self.build_lib = self.build_platlib
-            else:
-                self.build_lib = self.build_purelib
-
-        # 'build_temp' -- temporary directory for compiler turds,
-        # "build/temp.<plat>"
-        if self.build_temp is None:
-            self.build_temp = os.path.join(self.build_base,
-                                           'temp' + plat_specifier)
-        if self.build_scripts is None:
-            self.build_scripts = os.path.join(self.build_base,
-                                              'scripts-%d.%d' % sys.version_info[:2])
-
-        if self.executable is None and sys.executable:
-            self.executable = os.path.normpath(sys.executable)
-
-        if isinstance(self.parallel, str):
-            try:
-                self.parallel = int(self.parallel)
-            except ValueError:
-                raise DistutilsOptionError("parallel should be an integer")
-
-    def run(self):
-        # Run all relevant sub-commands.  This will be some subset of:
-        #  - build_py      - pure Python modules
-        #  - build_clib    - standalone C libraries
-        #  - build_ext     - Python extensions
-        #  - build_scripts - (Python) scripts
-        for cmd_name in self.get_sub_commands():
-            self.run_command(cmd_name)
-
-
-    # -- Predicates for the sub-command list ---------------------------
-
-    def has_pure_modules(self):
-        return self.distribution.has_pure_modules()
-
-    def has_c_libraries(self):
-        return self.distribution.has_c_libraries()
-
-    def has_ext_modules(self):
-        return self.distribution.has_ext_modules()
-
-    def has_scripts(self):
-        return self.distribution.has_scripts()
-
-
-    sub_commands = [('build_py',      has_pure_modules),
-                    ('build_clib',    has_c_libraries),
-                    ('build_ext',     has_ext_modules),
-                    ('build_scripts', has_scripts),
-                   ]
diff --git a/contrib/tools/python3/src/Lib/distutils/command/build_clib.py b/contrib/tools/python3/src/Lib/distutils/command/build_clib.py
deleted file mode 100644
index 3e20ef23cd..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/build_clib.py
+++ /dev/null
@@ -1,209 +0,0 @@
-"""distutils.command.build_clib
-
-Implements the Distutils 'build_clib' command, to build a C/C++ library
-that is included in the module distribution and needed by an extension
-module."""
-
-
-# XXX this module has *lots* of code ripped-off quite transparently from
-# build_ext.py -- not surprisingly really, as the work required to build
-# a static library from a collection of C source files is not really all
-# that different from what's required to build a shared object file from
-# a collection of C source files.  Nevertheless, I haven't done the
-# necessary refactoring to account for the overlap in code between the
-# two modules, mainly because a number of subtle details changed in the
-# cut 'n paste.  Sigh.
-
-import os
-from distutils.core import Command
-from distutils.errors import *
-from distutils.sysconfig import customize_compiler
-from distutils import log
-
-def show_compilers():
-    from distutils.ccompiler import show_compilers
-    show_compilers()
-
-
-class build_clib(Command):
-
-    description = "build C/C++ libraries used by Python extensions"
-
-    user_options = [
-        ('build-clib=', 'b',
-         "directory to build C/C++ libraries to"),
-        ('build-temp=', 't',
-         "directory to put temporary build by-products"),
-        ('debug', 'g',
-         "compile with debugging information"),
-        ('force', 'f',
-         "forcibly build everything (ignore file timestamps)"),
-        ('compiler=', 'c',
-         "specify the compiler type"),
-        ]
-
-    boolean_options = ['debug', 'force']
-
-    help_options = [
-        ('help-compiler', None,
-         "list available compilers", show_compilers),
-        ]
-
-    def initialize_options(self):
-        self.build_clib = None
-        self.build_temp = None
-
-        # List of libraries to build
-        self.libraries = None
-
-        # Compilation options for all libraries
-        self.include_dirs = None
-        self.define = None
-        self.undef = None
-        self.debug = None
-        self.force = 0
-        self.compiler = None
-
-
-    def finalize_options(self):
-        # This might be confusing: both build-clib and build-temp default
-        # to build-temp as defined by the "build" command.  This is because
-        # I think that C libraries are really just temporary build
-        # by-products, at least from the point of view of building Python
-        # extensions -- but I want to keep my options open.
-        self.set_undefined_options('build',
-                                   ('build_temp', 'build_clib'),
-                                   ('build_temp', 'build_temp'),
-                                   ('compiler', 'compiler'),
-                                   ('debug', 'debug'),
-                                   ('force', 'force'))
-
-        self.libraries = self.distribution.libraries
-        if self.libraries:
-            self.check_library_list(self.libraries)
-
-        if self.include_dirs is None:
-            self.include_dirs = self.distribution.include_dirs or []
-        if isinstance(self.include_dirs, str):
-            self.include_dirs = self.include_dirs.split(os.pathsep)
-
-        # XXX same as for build_ext -- what about 'self.define' and
-        # 'self.undef' ?
-
-
-    def run(self):
-        if not self.libraries:
-            return
-
-        # Yech -- this is cut 'n pasted from build_ext.py!
-        from distutils.ccompiler import new_compiler
-        self.compiler = new_compiler(compiler=self.compiler,
-                                     dry_run=self.dry_run,
-                                     force=self.force)
-        customize_compiler(self.compiler)
-
-        if self.include_dirs is not None:
-            self.compiler.set_include_dirs(self.include_dirs)
-        if self.define is not None:
-            # 'define' option is a list of (name,value) tuples
-            for (name,value) in self.define:
-                self.compiler.define_macro(name, value)
-        if self.undef is not None:
-            for macro in self.undef:
-                self.compiler.undefine_macro(macro)
-
-        self.build_libraries(self.libraries)
-
-
-    def check_library_list(self, libraries):
-        """Ensure that the list of libraries is valid.
-
-        `library` is presumably provided as a command option 'libraries'.
-        This method checks that it is a list of 2-tuples, where the tuples
-        are (library_name, build_info_dict).
-
-        Raise DistutilsSetupError if the structure is invalid anywhere;
-        just returns otherwise.
-        """
-        if not isinstance(libraries, list):
-            raise DistutilsSetupError(
-                  "'libraries' option must be a list of tuples")
-
-        for lib in libraries:
-            if not isinstance(lib, tuple) and len(lib) != 2:
-                raise DistutilsSetupError(
-                      "each element of 'libraries' must a 2-tuple")
-
-            name, build_info = lib
-
-            if not isinstance(name, str):
-                raise DistutilsSetupError(
-                      "first element of each tuple in 'libraries' "
-                      "must be a string (the library name)")
-
-            if '/' in name or (os.sep != '/' and os.sep in name):
-                raise DistutilsSetupError("bad library name '%s': "
-                       "may not contain directory separators" % lib[0])
-
-            if not isinstance(build_info, dict):
-                raise DistutilsSetupError(
-                      "second element of each tuple in 'libraries' "
-                      "must be a dictionary (build info)")
-
-
-    def get_library_names(self):
-        # Assume the library list is valid -- 'check_library_list()' is
-        # called from 'finalize_options()', so it should be!
-        if not self.libraries:
-            return None
-
-        lib_names = []
-        for (lib_name, build_info) in self.libraries:
-            lib_names.append(lib_name)
-        return lib_names
-
-
-    def get_source_files(self):
-        self.check_library_list(self.libraries)
-        filenames = []
-        for (lib_name, build_info) in self.libraries:
-            sources = build_info.get('sources')
-            if sources is None or not isinstance(sources, (list, tuple)):
-                raise DistutilsSetupError(
-                       "in 'libraries' option (library '%s'), "
-                       "'sources' must be present and must be "
-                       "a list of source filenames" % lib_name)
-
-            filenames.extend(sources)
-        return filenames
-
-
-    def build_libraries(self, libraries):
-        for (lib_name, build_info) in libraries:
-            sources = build_info.get('sources')
-            if sources is None or not isinstance(sources, (list, tuple)):
-                raise DistutilsSetupError(
-                       "in 'libraries' option (library '%s'), "
-                       "'sources' must be present and must be "
-                       "a list of source filenames" % lib_name)
-            sources = list(sources)
-
-            log.info("building '%s' library", lib_name)
-
-            # First, compile the source code to object files in the library
-            # directory.  (This should probably change to putting object
-            # files in a temporary build directory.)
-            macros = build_info.get('macros')
-            include_dirs = build_info.get('include_dirs')
-            objects = self.compiler.compile(sources,
-                                            output_dir=self.build_temp,
-                                            macros=macros,
-                                            include_dirs=include_dirs,
-                                            debug=self.debug)
-
-            # Now "link" the object files together into a static library.
-            # (On Unix at least, this isn't really linking -- it just
-            # builds an archive.  Whatever.)
-            self.compiler.create_static_lib(objects, lib_name,
-                                            output_dir=self.build_clib,
-                                            debug=self.debug)
diff --git a/contrib/tools/python3/src/Lib/distutils/command/build_ext.py b/contrib/tools/python3/src/Lib/distutils/command/build_ext.py
deleted file mode 100644
index f287b34998..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/build_ext.py
+++ /dev/null
@@ -1,754 +0,0 @@
-"""distutils.command.build_ext
-
-Implements the Distutils 'build_ext' command, for building extension
-modules (currently limited to C extensions, should accommodate C++
-extensions ASAP)."""
-
-import contextlib
-import os
-import re
-import sys
-from distutils.core import Command
-from distutils.errors import *
-from distutils.sysconfig import customize_compiler, get_python_version
-from distutils.sysconfig import get_config_h_filename
-from distutils.dep_util import newer_group
-from distutils.extension import Extension
-from distutils.util import get_platform
-from distutils import log
-
-from site import USER_BASE
-
-# An extension name is just a dot-separated list of Python NAMEs (ie.
-# the same as a fully-qualified module name).
-extension_name_re = re.compile \
-    (r'^[a-zA-Z_][a-zA-Z_0-9]*(\.[a-zA-Z_][a-zA-Z_0-9]*)*$')
-
-
-def show_compilers ():
-    from distutils.ccompiler import show_compilers
-    show_compilers()
-
-
-class build_ext(Command):
-
-    description = "build C/C++ extensions (compile/link to build directory)"
-
-    # XXX thoughts on how to deal with complex command-line options like
-    # these, i.e. how to make it so fancy_getopt can suck them off the
-    # command line and make it look like setup.py defined the appropriate
-    # lists of tuples of what-have-you.
-    #   - each command needs a callback to process its command-line options
-    #   - Command.__init__() needs access to its share of the whole
-    #     command line (must ultimately come from
-    #     Distribution.parse_command_line())
-    #   - it then calls the current command class' option-parsing
-    #     callback to deal with weird options like -D, which have to
-    #     parse the option text and churn out some custom data
-    #     structure
-    #   - that data structure (in this case, a list of 2-tuples)
-    #     will then be present in the command object by the time
-    #     we get to finalize_options() (i.e. the constructor
-    #     takes care of both command-line and client options
-    #     in between initialize_options() and finalize_options())
-
-    sep_by = " (separated by '%s')" % os.pathsep
-    user_options = [
-        ('build-lib=', 'b',
-         "directory for compiled extension modules"),
-        ('build-temp=', 't',
-         "directory for temporary files (build by-products)"),
-        ('plat-name=', 'p',
-         "platform name to cross-compile for, if supported "
-         "(default: %s)" % get_platform()),
-        ('inplace', 'i',
-         "ignore build-lib and put compiled extensions into the source " +
-         "directory alongside your pure Python modules"),
-        ('include-dirs=', 'I',
-         "list of directories to search for header files" + sep_by),
-        ('define=', 'D',
-         "C preprocessor macros to define"),
-        ('undef=', 'U',
-         "C preprocessor macros to undefine"),
-        ('libraries=', 'l',
-         "external C libraries to link with"),
-        ('library-dirs=', 'L',
-         "directories to search for external C libraries" + sep_by),
-        ('rpath=', 'R',
-         "directories to search for shared C libraries at runtime"),
-        ('link-objects=', 'O',
-         "extra explicit link objects to include in the link"),
-        ('debug', 'g',
-         "compile/link with debugging information"),
-        ('force', 'f',
-         "forcibly build everything (ignore file timestamps)"),
-        ('compiler=', 'c',
-         "specify the compiler type"),
-        ('parallel=', 'j',
-         "number of parallel build jobs"),
-        ('swig-cpp', None,
-         "make SWIG create C++ files (default is C)"),
-        ('swig-opts=', None,
-         "list of SWIG command line options"),
-        ('swig=', None,
-         "path to the SWIG executable"),
-        ('user', None,
-         "add user include, library and rpath")
-        ]
-
-    boolean_options = ['inplace', 'debug', 'force', 'swig-cpp', 'user']
-
-    help_options = [
-        ('help-compiler', None,
-         "list available compilers", show_compilers),
-        ]
-
-    def initialize_options(self):
-        self.extensions = None
-        self.build_lib = None
-        self.plat_name = None
-        self.build_temp = None
-        self.inplace = 0
-        self.package = None
-
-        self.include_dirs = None
-        self.define = None
-        self.undef = None
-        self.libraries = None
-        self.library_dirs = None
-        self.rpath = None
-        self.link_objects = None
-        self.debug = None
-        self.force = None
-        self.compiler = None
-        self.swig = None
-        self.swig_cpp = None
-        self.swig_opts = None
-        self.user = None
-        self.parallel = None
-
-    def finalize_options(self):
-        from distutils import sysconfig
-
-        self.set_undefined_options('build',
-                                   ('build_lib', 'build_lib'),
-                                   ('build_temp', 'build_temp'),
-                                   ('compiler', 'compiler'),
-                                   ('debug', 'debug'),
-                                   ('force', 'force'),
-                                   ('parallel', 'parallel'),
-                                   ('plat_name', 'plat_name'),
-                                   )
-
-        if self.package is None:
-            self.package = self.distribution.ext_package
-
-        self.extensions = self.distribution.ext_modules
-
-        # Make sure Python's include directories (for Python.h, pyconfig.h,
-        # etc.) are in the include search path.
-        py_include = sysconfig.get_python_inc()
-        plat_py_include = sysconfig.get_python_inc(plat_specific=1)
-        if self.include_dirs is None:
-            self.include_dirs = self.distribution.include_dirs or []
-        if isinstance(self.include_dirs, str):
-            self.include_dirs = self.include_dirs.split(os.pathsep)
-
-        # If in a virtualenv, add its include directory
-        # Issue 16116
-        if sys.exec_prefix != sys.base_exec_prefix:
-            self.include_dirs.append(os.path.join(sys.exec_prefix, 'include'))
-
-        # Put the Python "system" include dir at the end, so that
-        # any local include dirs take precedence.
-        self.include_dirs.extend(py_include.split(os.path.pathsep))
-        if plat_py_include != py_include:
-            self.include_dirs.extend(
-                plat_py_include.split(os.path.pathsep))
-
-        self.ensure_string_list('libraries')
-        self.ensure_string_list('link_objects')
-
-        # Life is easier if we're not forever checking for None, so
-        # simplify these options to empty lists if unset
-        if self.libraries is None:
-            self.libraries = []
-        if self.library_dirs is None:
-            self.library_dirs = []
-        elif isinstance(self.library_dirs, str):
-            self.library_dirs = self.library_dirs.split(os.pathsep)
-
-        if self.rpath is None:
-            self.rpath = []
-        elif isinstance(self.rpath, str):
-            self.rpath = self.rpath.split(os.pathsep)
-
-        # for extensions under windows use different directories
-        # for Release and Debug builds.
-        # also Python's library directory must be appended to library_dirs
-        if os.name == 'nt':
-            # the 'libs' directory is for binary installs - we assume that
-            # must be the *native* platform.  But we don't really support
-            # cross-compiling via a binary install anyway, so we let it go.
-            self.library_dirs.append(os.path.join(sys.exec_prefix, 'libs'))
-            if sys.base_exec_prefix != sys.prefix:  # Issue 16116
-                self.library_dirs.append(os.path.join(sys.base_exec_prefix, 'libs'))
-            if self.debug:
-                self.build_temp = os.path.join(self.build_temp, "Debug")
-            else:
-                self.build_temp = os.path.join(self.build_temp, "Release")
-
-            # Append the source distribution include and library directories,
-            # this allows distutils on windows to work in the source tree
-            self.include_dirs.append(os.path.dirname(get_config_h_filename()))
-            _sys_home = getattr(sys, '_home', None)
-            if _sys_home:
-                self.library_dirs.append(_sys_home)
-
-            # Use the .lib files for the correct architecture
-            if self.plat_name == 'win32':
-                suffix = 'win32'
-            else:
-                # win-amd64
-                suffix = self.plat_name[4:]
-            new_lib = os.path.join(sys.exec_prefix, 'PCbuild')
-            if suffix:
-                new_lib = os.path.join(new_lib, suffix)
-            self.library_dirs.append(new_lib)
-
-        # For extensions under Cygwin, Python's library directory must be
-        # appended to library_dirs
-        if sys.platform[:6] == 'cygwin':
-            if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
-                # building third party extensions
-                self.library_dirs.append(os.path.join(sys.prefix, "lib",
-                                                      "python" + get_python_version(),
-                                                      "config"))
-            else:
-                # building python standard extensions
-                self.library_dirs.append('.')
-
-        # For building extensions with a shared Python library,
-        # Python's library directory must be appended to library_dirs
-        # See Issues: #1600860, #4366
-        if (sysconfig.get_config_var('Py_ENABLE_SHARED')):
-            if not sysconfig.python_build:
-                # building third party extensions
-                self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))
-            else:
-                # building python standard extensions
-                self.library_dirs.append('.')
-
-        # The argument parsing will result in self.define being a string, but
-        # it has to be a list of 2-tuples.  All the preprocessor symbols
-        # specified by the 'define' option will be set to '1'.  Multiple
-        # symbols can be separated with commas.
-
-        if self.define:
-            defines = self.define.split(',')
-            self.define = [(symbol, '1') for symbol in defines]
-
-        # The option for macros to undefine is also a string from the
-        # option parsing, but has to be a list.  Multiple symbols can also
-        # be separated with commas here.
-        if self.undef:
-            self.undef = self.undef.split(',')
-
-        if self.swig_opts is None:
-            self.swig_opts = []
-        else:
-            self.swig_opts = self.swig_opts.split(' ')
-
-        # Finally add the user include and library directories if requested
-        if self.user:
-            user_include = os.path.join(USER_BASE, "include")
-            user_lib = os.path.join(USER_BASE, "lib")
-            if os.path.isdir(user_include):
-                self.include_dirs.append(user_include)
-            if os.path.isdir(user_lib):
-                self.library_dirs.append(user_lib)
-                self.rpath.append(user_lib)
-
-        if isinstance(self.parallel, str):
-            try:
-                self.parallel = int(self.parallel)
-            except ValueError:
-                raise DistutilsOptionError("parallel should be an integer")
-
-    def run(self):
-        from distutils.ccompiler import new_compiler
-
-        # 'self.extensions', as supplied by setup.py, is a list of
-        # Extension instances.  See the documentation for Extension (in
-        # distutils.extension) for details.
-        #
-        # For backwards compatibility with Distutils 0.8.2 and earlier, we
-        # also allow the 'extensions' list to be a list of tuples:
-        #    (ext_name, build_info)
-        # where build_info is a dictionary containing everything that
-        # Extension instances do except the name, with a few things being
-        # differently named.  We convert these 2-tuples to Extension
-        # instances as needed.
-
-        if not self.extensions:
-            return
-
-        # If we were asked to build any C/C++ libraries, make sure that the
-        # directory where we put them is in the library search path for
-        # linking extensions.
-        if self.distribution.has_c_libraries():
-            build_clib = self.get_finalized_command('build_clib')
-            self.libraries.extend(build_clib.get_library_names() or [])
-            self.library_dirs.append(build_clib.build_clib)
-
-        # Setup the CCompiler object that we'll use to do all the
-        # compiling and linking
-        self.compiler = new_compiler(compiler=self.compiler,
-                                     verbose=self.verbose,
-                                     dry_run=self.dry_run,
-                                     force=self.force)
-        customize_compiler(self.compiler)
-        # If we are cross-compiling, init the compiler now (if we are not
-        # cross-compiling, init would not hurt, but people may rely on
-        # late initialization of compiler even if they shouldn't...)
-        if os.name == 'nt' and self.plat_name != get_platform():
-            self.compiler.initialize(self.plat_name)
-
-        # And make sure that any compile/link-related options (which might
-        # come from the command-line or from the setup script) are set in
-        # that CCompiler object -- that way, they automatically apply to
-        # all compiling and linking done here.
-        if self.include_dirs is not None:
-            self.compiler.set_include_dirs(self.include_dirs)
-        if self.define is not None:
-            # 'define' option is a list of (name,value) tuples
-            for (name, value) in self.define:
-                self.compiler.define_macro(name, value)
-        if self.undef is not None:
-            for macro in self.undef:
-                self.compiler.undefine_macro(macro)
-        if self.libraries is not None:
-            self.compiler.set_libraries(self.libraries)
-        if self.library_dirs is not None:
-            self.compiler.set_library_dirs(self.library_dirs)
-        if self.rpath is not None:
-            self.compiler.set_runtime_library_dirs(self.rpath)
-        if self.link_objects is not None:
-            self.compiler.set_link_objects(self.link_objects)
-
-        # Now actually compile and link everything.
-        self.build_extensions()
-
-    def check_extensions_list(self, extensions):
-        """Ensure that the list of extensions (presumably provided as a
-        command option 'extensions') is valid, i.e. it is a list of
-        Extension objects.  We also support the old-style list of 2-tuples,
-        where the tuples are (ext_name, build_info), which are converted to
-        Extension instances here.
-
-        Raise DistutilsSetupError if the structure is invalid anywhere;
-        just returns otherwise.
-        """
-        if not isinstance(extensions, list):
-            raise DistutilsSetupError(
-                  "'ext_modules' option must be a list of Extension instances")
-
-        for i, ext in enumerate(extensions):
-            if isinstance(ext, Extension):
-                continue                # OK! (assume type-checking done
-                                        # by Extension constructor)
-
-            if not isinstance(ext, tuple) or len(ext) != 2:
-                raise DistutilsSetupError(
-                       "each element of 'ext_modules' option must be an "
-                       "Extension instance or 2-tuple")
-
-            ext_name, build_info = ext
-
-            log.warn("old-style (ext_name, build_info) tuple found in "
-                     "ext_modules for extension '%s' "
-                     "-- please convert to Extension instance", ext_name)
-
-            if not (isinstance(ext_name, str) and
-                    extension_name_re.match(ext_name)):
-                raise DistutilsSetupError(
-                       "first element of each tuple in 'ext_modules' "
-                       "must be the extension name (a string)")
-
-            if not isinstance(build_info, dict):
-                raise DistutilsSetupError(
-                       "second element of each tuple in 'ext_modules' "
-                       "must be a dictionary (build info)")
-
-            # OK, the (ext_name, build_info) dict is type-safe: convert it
-            # to an Extension instance.
-            ext = Extension(ext_name, build_info['sources'])
-
-            # Easy stuff: one-to-one mapping from dict elements to
-            # instance attributes.
-            for key in ('include_dirs', 'library_dirs', 'libraries',
-                        'extra_objects', 'extra_compile_args',
-                        'extra_link_args'):
-                val = build_info.get(key)
-                if val is not None:
-                    setattr(ext, key, val)
-
-            # Medium-easy stuff: same syntax/semantics, different names.
-            ext.runtime_library_dirs = build_info.get('rpath')
-            if 'def_file' in build_info:
-                log.warn("'def_file' element of build info dict "
-                         "no longer supported")
-
-            # Non-trivial stuff: 'macros' split into 'define_macros'
-            # and 'undef_macros'.
-            macros = build_info.get('macros')
-            if macros:
-                ext.define_macros = []
-                ext.undef_macros = []
-                for macro in macros:
-                    if not (isinstance(macro, tuple) and len(macro) in (1, 2)):
-                        raise DistutilsSetupError(
-                              "'macros' element of build info dict "
-                              "must be 1- or 2-tuple")
-                    if len(macro) == 1:
-                        ext.undef_macros.append(macro[0])
-                    elif len(macro) == 2:
-                        ext.define_macros.append(macro)
-
-            extensions[i] = ext
-
-    def get_source_files(self):
-        self.check_extensions_list(self.extensions)
-        filenames = []
-
-        # Wouldn't it be neat if we knew the names of header files too...
-        for ext in self.extensions:
-            filenames.extend(ext.sources)
-        return filenames
-
-    def get_outputs(self):
-        # Sanity check the 'extensions' list -- can't assume this is being
-        # done in the same run as a 'build_extensions()' call (in fact, we
-        # can probably assume that it *isn't*!).
-        self.check_extensions_list(self.extensions)
-
-        # And build the list of output (built) filenames.  Note that this
-        # ignores the 'inplace' flag, and assumes everything goes in the
-        # "build" tree.
-        outputs = []
-        for ext in self.extensions:
-            outputs.append(self.get_ext_fullpath(ext.name))
-        return outputs
-
-    def build_extensions(self):
-        # First, sanity-check the 'extensions' list
-        self.check_extensions_list(self.extensions)
-        if self.parallel:
-            self._build_extensions_parallel()
-        else:
-            self._build_extensions_serial()
-
-    def _build_extensions_parallel(self):
-        workers = self.parallel
-        if self.parallel is True:
-            workers = os.cpu_count()  # may return None
-        try:
-            from concurrent.futures import ThreadPoolExecutor
-        except ImportError:
-            workers = None
-
-        if workers is None:
-            self._build_extensions_serial()
-            return
-
-        with ThreadPoolExecutor(max_workers=workers) as executor:
-            futures = [executor.submit(self.build_extension, ext)
-                       for ext in self.extensions]
-            for ext, fut in zip(self.extensions, futures):
-                with self._filter_build_errors(ext):
-                    fut.result()
-
-    def _build_extensions_serial(self):
-        for ext in self.extensions:
-            with self._filter_build_errors(ext):
-                self.build_extension(ext)
-
-    @contextlib.contextmanager
-    def _filter_build_errors(self, ext):
-        try:
-            yield
-        except (CCompilerError, DistutilsError, CompileError) as e:
-            if not ext.optional:
-                raise
-            self.warn('building extension "%s" failed: %s' %
-                      (ext.name, e))
-
-    def build_extension(self, ext):
-        sources = ext.sources
-        if sources is None or not isinstance(sources, (list, tuple)):
-            raise DistutilsSetupError(
-                  "in 'ext_modules' option (extension '%s'), "
-                  "'sources' must be present and must be "
-                  "a list of source filenames" % ext.name)
-        # sort to make the resulting .so file build reproducible
-        sources = sorted(sources)
-
-        ext_path = self.get_ext_fullpath(ext.name)
-        depends = sources + ext.depends
-        if not (self.force or newer_group(depends, ext_path, 'newer')):
-            log.debug("skipping '%s' extension (up-to-date)", ext.name)
-            return
-        else:
-            log.info("building '%s' extension", ext.name)
-
-        # First, scan the sources for SWIG definition files (.i), run
-        # SWIG on 'em to create .c files, and modify the sources list
-        # accordingly.
-        sources = self.swig_sources(sources, ext)
-
-        # Next, compile the source code to object files.
-
-        # XXX not honouring 'define_macros' or 'undef_macros' -- the
-        # CCompiler API needs to change to accommodate this, and I
-        # want to do one thing at a time!
-
-        # Two possible sources for extra compiler arguments:
-        #   - 'extra_compile_args' in Extension object
-        #   - CFLAGS environment variable (not particularly
-        #     elegant, but people seem to expect it and I
-        #     guess it's useful)
-        # The environment variable should take precedence, and
-        # any sensible compiler will give precedence to later
-        # command line args.  Hence we combine them in order:
-        extra_args = ext.extra_compile_args or []
-
-        macros = ext.define_macros[:]
-        for undef in ext.undef_macros:
-            macros.append((undef,))
-
-        objects = self.compiler.compile(sources,
-                                         output_dir=self.build_temp,
-                                         macros=macros,
-                                         include_dirs=ext.include_dirs,
-                                         debug=self.debug,
-                                         extra_postargs=extra_args,
-                                         depends=ext.depends)
-
-        # XXX outdated variable, kept here in case third-part code
-        # needs it.
-        self._built_objects = objects[:]
-
-        # Now link the object files together into a "shared object" --
-        # of course, first we have to figure out all the other things
-        # that go into the mix.
-        if ext.extra_objects:
-            objects.extend(ext.extra_objects)
-        extra_args = ext.extra_link_args or []
-
-        # Detect target language, if not provided
-        language = ext.language or self.compiler.detect_language(sources)
-
-        self.compiler.link_shared_object(
-            objects, ext_path,
-            libraries=self.get_libraries(ext),
-            library_dirs=ext.library_dirs,
-            runtime_library_dirs=ext.runtime_library_dirs,
-            extra_postargs=extra_args,
-            export_symbols=self.get_export_symbols(ext),
-            debug=self.debug,
-            build_temp=self.build_temp,
-            target_lang=language)
-
-    def swig_sources(self, sources, extension):
-        """Walk the list of source files in 'sources', looking for SWIG
-        interface (.i) files.  Run SWIG on all that are found, and
-        return a modified 'sources' list with SWIG source files replaced
-        by the generated C (or C++) files.
-        """
-        new_sources = []
-        swig_sources = []
-        swig_targets = {}
-
-        # XXX this drops generated C/C++ files into the source tree, which
-        # is fine for developers who want to distribute the generated
-        # source -- but there should be an option to put SWIG output in
-        # the temp dir.
-
-        if self.swig_cpp:
-            log.warn("--swig-cpp is deprecated - use --swig-opts=-c++")
-
-        if self.swig_cpp or ('-c++' in self.swig_opts) or \
-           ('-c++' in extension.swig_opts):
-            target_ext = '.cpp'
-        else:
-            target_ext = '.c'
-
-        for source in sources:
-            (base, ext) = os.path.splitext(source)
-            if ext == ".i":             # SWIG interface file
-                new_sources.append(base + '_wrap' + target_ext)
-                swig_sources.append(source)
-                swig_targets[source] = new_sources[-1]
-            else:
-                new_sources.append(source)
-
-        if not swig_sources:
-            return new_sources
-
-        swig = self.swig or self.find_swig()
-        swig_cmd = [swig, "-python"]
-        swig_cmd.extend(self.swig_opts)
-        if self.swig_cpp:
-            swig_cmd.append("-c++")
-
-        # Do not override commandline arguments
-        if not self.swig_opts:
-            for o in extension.swig_opts:
-                swig_cmd.append(o)
-
-        for source in swig_sources:
-            target = swig_targets[source]
-            log.info("swigging %s to %s", source, target)
-            self.spawn(swig_cmd + ["-o", target, source])
-
-        return new_sources
-
-    def find_swig(self):
-        """Return the name of the SWIG executable.  On Unix, this is
-        just "swig" -- it should be in the PATH.  Tries a bit harder on
-        Windows.
-        """
-        if os.name == "posix":
-            return "swig"
-        elif os.name == "nt":
-            # Look for SWIG in its standard installation directory on
-            # Windows (or so I presume!).  If we find it there, great;
-            # if not, act like Unix and assume it's in the PATH.
-            for vers in ("1.3", "1.2", "1.1"):
-                fn = os.path.join("c:\\swig%s" % vers, "swig.exe")
-                if os.path.isfile(fn):
-                    return fn
-            else:
-                return "swig.exe"
-        else:
-            raise DistutilsPlatformError(
-                  "I don't know how to find (much less run) SWIG "
-                  "on platform '%s'" % os.name)
-
-    # -- Name generators -----------------------------------------------
-    # (extension names, filenames, whatever)
-    def get_ext_fullpath(self, ext_name):
-        """Returns the path of the filename for a given extension.
-
-        The file is located in `build_lib` or directly in the package
-        (inplace option).
-        """
-        fullname = self.get_ext_fullname(ext_name)
-        modpath = fullname.split('.')
-        filename = self.get_ext_filename(modpath[-1])
-
-        if not self.inplace:
-            # no further work needed
-            # returning :
-            #   build_dir/package/path/filename
-            filename = os.path.join(*modpath[:-1]+[filename])
-            return os.path.join(self.build_lib, filename)
-
-        # the inplace option requires to find the package directory
-        # using the build_py command for that
-        package = '.'.join(modpath[0:-1])
-        build_py = self.get_finalized_command('build_py')
-        package_dir = os.path.abspath(build_py.get_package_dir(package))
-
-        # returning
-        #   package_dir/filename
-        return os.path.join(package_dir, filename)
-
-    def get_ext_fullname(self, ext_name):
-        """Returns the fullname of a given extension name.
-
-        Adds the `package.` prefix"""
-        if self.package is None:
-            return ext_name
-        else:
-            return self.package + '.' + ext_name
-
-    def get_ext_filename(self, ext_name):
-        r"""Convert the name of an extension (eg. "foo.bar") into the name
-        of the file from which it will be loaded (eg. "foo/bar.so", or
-        "foo\bar.pyd").
-        """
-        from distutils.sysconfig import get_config_var
-        ext_path = ext_name.split('.')
-        ext_suffix = get_config_var('EXT_SUFFIX')
-        return os.path.join(*ext_path) + ext_suffix
-
-    def get_export_symbols(self, ext):
-        """Return the list of symbols that a shared extension has to
-        export.  This either uses 'ext.export_symbols' or, if it's not
-        provided, "PyInit_" + module_name.  Only relevant on Windows, where
-        the .pyd file (DLL) must export the module "PyInit_" function.
-        """
-        suffix = '_' + ext.name.split('.')[-1]
-        try:
-            # Unicode module name support as defined in PEP-489
-            # https://peps.python.org/pep-0489/#export-hook-name
-            suffix.encode('ascii')
-        except UnicodeEncodeError:
-            suffix = 'U' + suffix.encode('punycode').replace(b'-', b'_').decode('ascii')
-
-        initfunc_name = "PyInit" + suffix
-        if initfunc_name not in ext.export_symbols:
-            ext.export_symbols.append(initfunc_name)
-        return ext.export_symbols
-
-    def get_libraries(self, ext):
-        """Return the list of libraries to link against when building a
-        shared extension.  On most platforms, this is just 'ext.libraries';
-        on Windows, we add the Python library (eg. python20.dll).
-        """
-        # The python library is always needed on Windows.  For MSVC, this
-        # is redundant, since the library is mentioned in a pragma in
-        # pyconfig.h that MSVC groks.  The other Windows compilers all seem
-        # to need it mentioned explicitly, though, so that's what we do.
-        # Append '_d' to the python import library on debug builds.
-        if sys.platform == "win32":
-            from distutils._msvccompiler import MSVCCompiler
-            if not isinstance(self.compiler, MSVCCompiler):
-                template = "python%d%d"
-                if self.debug:
-                    template = template + '_d'
-                pythonlib = (template %
-                       (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
-                # don't extend ext.libraries, it may be shared with other
-                # extensions, it is a reference to the original list
-                return ext.libraries + [pythonlib]
-        else:
-            # On Android only the main executable and LD_PRELOADs are considered
-            # to be RTLD_GLOBAL, all the dependencies of the main executable
-            # remain RTLD_LOCAL and so the shared libraries must be linked with
-            # libpython when python is built with a shared python library (issue
-            # bpo-21536).
-            # On Cygwin (and if required, other POSIX-like platforms based on
-            # Windows like MinGW) it is simply necessary that all symbols in
-            # shared libraries are resolved at link time.
-            from distutils.sysconfig import get_config_var
-            link_libpython = False
-            if get_config_var('Py_ENABLE_SHARED'):
-                # A native build on an Android device or on Cygwin
-                if hasattr(sys, 'getandroidapilevel'):
-                    link_libpython = True
-                elif sys.platform == 'cygwin':
-                    link_libpython = True
-                elif '_PYTHON_HOST_PLATFORM' in os.environ:
-                    # We are cross-compiling for one of the relevant platforms
-                    if get_config_var('ANDROID_API_LEVEL') != 0:
-                        link_libpython = True
-                    elif get_config_var('MACHDEP') == 'cygwin':
-                        link_libpython = True
-
-            if link_libpython:
-                ldversion = get_config_var('LDVERSION')
-                return ext.libraries + ['python' + ldversion]
-
-        return ext.libraries
diff --git a/contrib/tools/python3/src/Lib/distutils/command/build_py.py b/contrib/tools/python3/src/Lib/distutils/command/build_py.py
deleted file mode 100644
index edc2171cd1..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/build_py.py
+++ /dev/null
@@ -1,416 +0,0 @@
-"""distutils.command.build_py
-
-Implements the Distutils 'build_py' command."""
-
-import os
-import importlib.util
-import sys
-import glob
-
-from distutils.core import Command
-from distutils.errors import *
-from distutils.util import convert_path, Mixin2to3
-from distutils import log
-
-class build_py (Command):
-
-    description = "\"build\" pure Python modules (copy to build directory)"
-
-    user_options = [
-        ('build-lib=', 'd', "directory to \"build\" (copy) to"),
-        ('compile', 'c', "compile .py to .pyc"),
-        ('no-compile', None, "don't compile .py files [default]"),
-        ('optimize=', 'O',
-         "also compile with optimization: -O1 for \"python -O\", "
-         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
-        ('force', 'f', "forcibly build everything (ignore file timestamps)"),
-        ]
-
-    boolean_options = ['compile', 'force']
-    negative_opt = {'no-compile' : 'compile'}
-
-    def initialize_options(self):
-        self.build_lib = None
-        self.py_modules = None
-        self.package = None
-        self.package_data = None
-        self.package_dir = None
-        self.compile = 0
-        self.optimize = 0
-        self.force = None
-
-    def finalize_options(self):
-        self.set_undefined_options('build',
-                                   ('build_lib', 'build_lib'),
-                                   ('force', 'force'))
-
-        # Get the distribution options that are aliases for build_py
-        # options -- list of packages and list of modules.
-        self.packages = self.distribution.packages
-        self.py_modules = self.distribution.py_modules
-        self.package_data = self.distribution.package_data
-        self.package_dir = {}
-        if self.distribution.package_dir:
-            for name, path in self.distribution.package_dir.items():
-                self.package_dir[name] = convert_path(path)
-        self.data_files = self.get_data_files()
-
-        # Ick, copied straight from install_lib.py (fancy_getopt needs a
-        # type system!  Hell, *everything* needs a type system!!!)
-        if not isinstance(self.optimize, int):
-            try:
-                self.optimize = int(self.optimize)
-                assert 0 <= self.optimize <= 2
-            except (ValueError, AssertionError):
-                raise DistutilsOptionError("optimize must be 0, 1, or 2")
-
-    def run(self):
-        # XXX copy_file by default preserves atime and mtime.  IMHO this is
-        # the right thing to do, but perhaps it should be an option -- in
-        # particular, a site administrator might want installed files to
-        # reflect the time of installation rather than the last
-        # modification time before the installed release.
-
-        # XXX copy_file by default preserves mode, which appears to be the
-        # wrong thing to do: if a file is read-only in the working
-        # directory, we want it to be installed read/write so that the next
-        # installation of the same module distribution can overwrite it
-        # without problems.  (This might be a Unix-specific issue.)  Thus
-        # we turn off 'preserve_mode' when copying to the build directory,
-        # since the build directory is supposed to be exactly what the
-        # installation will look like (ie. we preserve mode when
-        # installing).
-
-        # Two options control which modules will be installed: 'packages'
-        # and 'py_modules'.  The former lets us work with whole packages, not
-        # specifying individual modules at all; the latter is for
-        # specifying modules one-at-a-time.
-
-        if self.py_modules:
-            self.build_modules()
-        if self.packages:
-            self.build_packages()
-            self.build_package_data()
-
-        self.byte_compile(self.get_outputs(include_bytecode=0))
-
-    def get_data_files(self):
-        """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
-        data = []
-        if not self.packages:
-            return data
-        for package in self.packages:
-            # Locate package source directory
-            src_dir = self.get_package_dir(package)
-
-            # Compute package build directory
-            build_dir = os.path.join(*([self.build_lib] + package.split('.')))
-
-            # Length of path to strip from found files
-            plen = 0
-            if src_dir:
-                plen = len(src_dir)+1
-
-            # Strip directory from globbed filenames
-            filenames = [
-                file[plen:] for file in self.find_data_files(package, src_dir)
-                ]
-            data.append((package, src_dir, build_dir, filenames))
-        return data
-
-    def find_data_files(self, package, src_dir):
-        """Return filenames for package's data files in 'src_dir'"""
-        globs = (self.package_data.get('', [])
-                 + self.package_data.get(package, []))
-        files = []
-        for pattern in globs:
-            # Each pattern has to be converted to a platform-specific path
-            filelist = glob.glob(os.path.join(glob.escape(src_dir), convert_path(pattern)))
-            # Files that match more than one pattern are only added once
-            files.extend([fn for fn in filelist if fn not in files
-                and os.path.isfile(fn)])
-        return files
-
-    def build_package_data(self):
-        """Copy data files into build directory"""
-        lastdir = None
-        for package, src_dir, build_dir, filenames in self.data_files:
-            for filename in filenames:
-                target = os.path.join(build_dir, filename)
-                self.mkpath(os.path.dirname(target))
-                self.copy_file(os.path.join(src_dir, filename), target,
-                               preserve_mode=False)
-
-    def get_package_dir(self, package):
-        """Return the directory, relative to the top of the source
-           distribution, where package 'package' should be found
-           (at least according to the 'package_dir' option, if any)."""
-        path = package.split('.')
-
-        if not self.package_dir:
-            if path:
-                return os.path.join(*path)
-            else:
-                return ''
-        else:
-            tail = []
-            while path:
-                try:
-                    pdir = self.package_dir['.'.join(path)]
-                except KeyError:
-                    tail.insert(0, path[-1])
-                    del path[-1]
-                else:
-                    tail.insert(0, pdir)
-                    return os.path.join(*tail)
-            else:
-                # Oops, got all the way through 'path' without finding a
-                # match in package_dir.  If package_dir defines a directory
-                # for the root (nameless) package, then fallback on it;
-                # otherwise, we might as well have not consulted
-                # package_dir at all, as we just use the directory implied
-                # by 'tail' (which should be the same as the original value
-                # of 'path' at this point).
-                pdir = self.package_dir.get('')
-                if pdir is not None:
-                    tail.insert(0, pdir)
-
-                if tail:
-                    return os.path.join(*tail)
-                else:
-                    return ''
-
-    def check_package(self, package, package_dir):
-        # Empty dir name means current directory, which we can probably
-        # assume exists.  Also, os.path.exists and isdir don't know about
-        # my "empty string means current dir" convention, so we have to
-        # circumvent them.
-        if package_dir != "":
-            if not os.path.exists(package_dir):
-                raise DistutilsFileError(
-                      "package directory '%s' does not exist" % package_dir)
-            if not os.path.isdir(package_dir):
-                raise DistutilsFileError(
-                       "supposed package directory '%s' exists, "
-                       "but is not a directory" % package_dir)
-
-        # Require __init__.py for all but the "root package"
-        if package:
-            init_py = os.path.join(package_dir, "__init__.py")
-            if os.path.isfile(init_py):
-                return init_py
-            else:
-                log.warn(("package init file '%s' not found " +
-                          "(or not a regular file)"), init_py)
-
-        # Either not in a package at all (__init__.py not expected), or
-        # __init__.py doesn't exist -- so don't return the filename.
-        return None
-
-    def check_module(self, module, module_file):
-        if not os.path.isfile(module_file):
-            log.warn("file %s (for module %s) not found", module_file, module)
-            return False
-        else:
-            return True
-
-    def find_package_modules(self, package, package_dir):
-        self.check_package(package, package_dir)
-        module_files = glob.glob(os.path.join(glob.escape(package_dir), "*.py"))
-        modules = []
-        setup_script = os.path.abspath(self.distribution.script_name)
-
-        for f in module_files:
-            abs_f = os.path.abspath(f)
-            if abs_f != setup_script:
-                module = os.path.splitext(os.path.basename(f))[0]
-                modules.append((package, module, f))
-            else:
-                self.debug_print("excluding %s" % setup_script)
-        return modules
-
-    def find_modules(self):
-        """Finds individually-specified Python modules, ie. those listed by
-        module name in 'self.py_modules'.  Returns a list of tuples (package,
-        module_base, filename): 'package' is a tuple of the path through
-        package-space to the module; 'module_base' is the bare (no
-        packages, no dots) module name, and 'filename' is the path to the
-        ".py" file (relative to the distribution root) that implements the
-        module.
-        """
-        # Map package names to tuples of useful info about the package:
-        #    (package_dir, checked)
-        # package_dir - the directory where we'll find source files for
-        #   this package
-        # checked - true if we have checked that the package directory
-        #   is valid (exists, contains __init__.py, ... ?)
-        packages = {}
-
-        # List of (package, module, filename) tuples to return
-        modules = []
-
-        # We treat modules-in-packages almost the same as toplevel modules,
-        # just the "package" for a toplevel is empty (either an empty
-        # string or empty list, depending on context).  Differences:
-        #   - don't check for __init__.py in directory for empty package
-        for module in self.py_modules:
-            path = module.split('.')
-            package = '.'.join(path[0:-1])
-            module_base = path[-1]
-
-            try:
-                (package_dir, checked) = packages[package]
-            except KeyError:
-                package_dir = self.get_package_dir(package)
-                checked = 0
-
-            if not checked:
-                init_py = self.check_package(package, package_dir)
-                packages[package] = (package_dir, 1)
-                if init_py:
-                    modules.append((package, "__init__", init_py))
-
-            # XXX perhaps we should also check for just .pyc files
-            # (so greedy closed-source bastards can distribute Python
-            # modules too)
-            module_file = os.path.join(package_dir, module_base + ".py")
-            if not self.check_module(module, module_file):
-                continue
-
-            modules.append((package, module_base, module_file))
-
-        return modules
-
-    def find_all_modules(self):
-        """Compute the list of all modules that will be built, whether
-        they are specified one-module-at-a-time ('self.py_modules') or
-        by whole packages ('self.packages').  Return a list of tuples
-        (package, module, module_file), just like 'find_modules()' and
-        'find_package_modules()' do."""
-        modules = []
-        if self.py_modules:
-            modules.extend(self.find_modules())
-        if self.packages:
-            for package in self.packages:
-                package_dir = self.get_package_dir(package)
-                m = self.find_package_modules(package, package_dir)
-                modules.extend(m)
-        return modules
-
-    def get_source_files(self):
-        return [module[-1] for module in self.find_all_modules()]
-
-    def get_module_outfile(self, build_dir, package, module):
-        outfile_path = [build_dir] + list(package) + [module + ".py"]
-        return os.path.join(*outfile_path)
-
-    def get_outputs(self, include_bytecode=1):
-        modules = self.find_all_modules()
-        outputs = []
-        for (package, module, module_file) in modules:
-            package = package.split('.')
-            filename = self.get_module_outfile(self.build_lib, package, module)
-            outputs.append(filename)
-            if include_bytecode:
-                if self.compile:
-                    outputs.append(importlib.util.cache_from_source(
-                        filename, optimization=''))
-                if self.optimize > 0:
-                    outputs.append(importlib.util.cache_from_source(
-                        filename, optimization=self.optimize))
-
-        outputs += [
-            os.path.join(build_dir, filename)
-            for package, src_dir, build_dir, filenames in self.data_files
-            for filename in filenames
-            ]
-
-        return outputs
-
-    def build_module(self, module, module_file, package):
-        if isinstance(package, str):
-            package = package.split('.')
-        elif not isinstance(package, (list, tuple)):
-            raise TypeError(
-                  "'package' must be a string (dot-separated), list, or tuple")
-
-        # Now put the module source file into the "build" area -- this is
-        # easy, we just copy it somewhere under self.build_lib (the build
-        # directory for Python source).
-        outfile = self.get_module_outfile(self.build_lib, package, module)
-        dir = os.path.dirname(outfile)
-        self.mkpath(dir)
-        return self.copy_file(module_file, outfile, preserve_mode=0)
-
-    def build_modules(self):
-        modules = self.find_modules()
-        for (package, module, module_file) in modules:
-            # Now "build" the module -- ie. copy the source file to
-            # self.build_lib (the build directory for Python source).
-            # (Actually, it gets copied to the directory for this package
-            # under self.build_lib.)
-            self.build_module(module, module_file, package)
-
-    def build_packages(self):
-        for package in self.packages:
-            # Get list of (package, module, module_file) tuples based on
-            # scanning the package directory.  'package' is only included
-            # in the tuple so that 'find_modules()' and
-            # 'find_package_tuples()' have a consistent interface; it's
-            # ignored here (apart from a sanity check).  Also, 'module' is
-            # the *unqualified* module name (ie. no dots, no package -- we
-            # already know its package!), and 'module_file' is the path to
-            # the .py file, relative to the current directory
-            # (ie. including 'package_dir').
-            package_dir = self.get_package_dir(package)
-            modules = self.find_package_modules(package, package_dir)
-
-            # Now loop over the modules we found, "building" each one (just
-            # copy it to self.build_lib).
-            for (package_, module, module_file) in modules:
-                assert package == package_
-                self.build_module(module, module_file, package)
-
-    def byte_compile(self, files):
-        if sys.dont_write_bytecode:
-            self.warn('byte-compiling is disabled, skipping.')
-            return
-
-        from distutils.util import byte_compile
-        prefix = self.build_lib
-        if prefix[-1] != os.sep:
-            prefix = prefix + os.sep
-
-        # XXX this code is essentially the same as the 'byte_compile()
-        # method of the "install_lib" command, except for the determination
-        # of the 'prefix' string.  Hmmm.
-        if self.compile:
-            byte_compile(files, optimize=0,
-                         force=self.force, prefix=prefix, dry_run=self.dry_run)
-        if self.optimize > 0:
-            byte_compile(files, optimize=self.optimize,
-                         force=self.force, prefix=prefix, dry_run=self.dry_run)
-
-class build_py_2to3(build_py, Mixin2to3):
-    def run(self):
-        self.updated_files = []
-
-        # Base class code
-        if self.py_modules:
-            self.build_modules()
-        if self.packages:
-            self.build_packages()
-            self.build_package_data()
-
-        # 2to3
-        self.run_2to3(self.updated_files)
-
-        # Remaining base class code
-        self.byte_compile(self.get_outputs(include_bytecode=0))
-
-    def build_module(self, module, module_file, package):
-        res = build_py.build_module(self, module, module_file, package)
-        if res[1]:
-            # file was copied
-            self.updated_files.append(res[0])
-        return res
diff --git a/contrib/tools/python3/src/Lib/distutils/command/build_scripts.py b/contrib/tools/python3/src/Lib/distutils/command/build_scripts.py
deleted file mode 100644
index ccc70e6465..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/build_scripts.py
+++ /dev/null
@@ -1,160 +0,0 @@
-"""distutils.command.build_scripts
-
-Implements the Distutils 'build_scripts' command."""
-
-import os, re
-from stat import ST_MODE
-from distutils import sysconfig
-from distutils.core import Command
-from distutils.dep_util import newer
-from distutils.util import convert_path, Mixin2to3
-from distutils import log
-import tokenize
-
-# check if Python is called on the first line with this expression
-first_line_re = re.compile(b'^#!.*python[0-9.]*([ \t].*)?$')
-
-class build_scripts(Command):
-
-    description = "\"build\" scripts (copy and fixup #! line)"
-
-    user_options = [
-        ('build-dir=', 'd', "directory to \"build\" (copy) to"),
-        ('force', 'f', "forcibly build everything (ignore file timestamps"),
-        ('executable=', 'e', "specify final destination interpreter path"),
-        ]
-
-    boolean_options = ['force']
-
-
-    def initialize_options(self):
-        self.build_dir = None
-        self.scripts = None
-        self.force = None
-        self.executable = None
-        self.outfiles = None
-
-    def finalize_options(self):
-        self.set_undefined_options('build',
-                                   ('build_scripts', 'build_dir'),
-                                   ('force', 'force'),
-                                   ('executable', 'executable'))
-        self.scripts = self.distribution.scripts
-
-    def get_source_files(self):
-        return self.scripts
-
-    def run(self):
-        if not self.scripts:
-            return
-        self.copy_scripts()
-
-
-    def copy_scripts(self):
-        r"""Copy each script listed in 'self.scripts'; if it's marked as a
-        Python script in the Unix way (first line matches 'first_line_re',
-        ie. starts with "\#!" and contains "python"), then adjust the first
-        line to refer to the current Python interpreter as we copy.
-        """
-        self.mkpath(self.build_dir)
-        outfiles = []
-        updated_files = []
-        for script in self.scripts:
-            adjust = False
-            script = convert_path(script)
-            outfile = os.path.join(self.build_dir, os.path.basename(script))
-            outfiles.append(outfile)
-
-            if not self.force and not newer(script, outfile):
-                log.debug("not copying %s (up-to-date)", script)
-                continue
-
-            # Always open the file, but ignore failures in dry-run mode --
-            # that way, we'll get accurate feedback if we can read the
-            # script.
-            try:
-                f = open(script, "rb")
-            except OSError:
-                if not self.dry_run:
-                    raise
-                f = None
-            else:
-                encoding, lines = tokenize.detect_encoding(f.readline)
-                f.seek(0)
-                first_line = f.readline()
-                if not first_line:
-                    self.warn("%s is an empty file (skipping)" % script)
-                    continue
-
-                match = first_line_re.match(first_line)
-                if match:
-                    adjust = True
-                    post_interp = match.group(1) or b''
-
-            if adjust:
-                log.info("copying and adjusting %s -> %s", script,
-                         self.build_dir)
-                updated_files.append(outfile)
-                if not self.dry_run:
-                    if not sysconfig.python_build:
-                        executable = self.executable
-                    else:
-                        executable = os.path.join(
-                            sysconfig.get_config_var("BINDIR"),
-                           "python%s%s" % (sysconfig.get_config_var("VERSION"),
-                                           sysconfig.get_config_var("EXE")))
-                    executable = os.fsencode(executable)
-                    shebang = b"#!" + executable + post_interp + b"\n"
-                    # Python parser starts to read a script using UTF-8 until
-                    # it gets a #coding:xxx cookie. The shebang has to be the
-                    # first line of a file, the #coding:xxx cookie cannot be
-                    # written before. So the shebang has to be decodable from
-                    # UTF-8.
-                    try:
-                        shebang.decode('utf-8')
-                    except UnicodeDecodeError:
-                        raise ValueError(
-                            "The shebang ({!r}) is not decodable "
-                            "from utf-8".format(shebang))
-                    # If the script is encoded to a custom encoding (use a
-                    # #coding:xxx cookie), the shebang has to be decodable from
-                    # the script encoding too.
-                    try:
-                        shebang.decode(encoding)
-                    except UnicodeDecodeError:
-                        raise ValueError(
-                            "The shebang ({!r}) is not decodable "
-                            "from the script encoding ({})"
-                            .format(shebang, encoding))
-                    with open(outfile, "wb") as outf:
-                        outf.write(shebang)
-                        outf.writelines(f.readlines())
-                if f:
-                    f.close()
-            else:
-                if f:
-                    f.close()
-                updated_files.append(outfile)
-                self.copy_file(script, outfile)
-
-        if os.name == 'posix':
-            for file in outfiles:
-                if self.dry_run:
-                    log.info("changing mode of %s", file)
-                else:
-                    oldmode = os.stat(file)[ST_MODE] & 0o7777
-                    newmode = (oldmode | 0o555) & 0o7777
-                    if newmode != oldmode:
-                        log.info("changing mode of %s from %o to %o",
-                                 file, oldmode, newmode)
-                        os.chmod(file, newmode)
-        # XXX should we modify self.outfiles?
-        return outfiles, updated_files
-
-class build_scripts_2to3(build_scripts, Mixin2to3):
-
-    def copy_scripts(self):
-        outfiles, updated_files = build_scripts.copy_scripts(self)
-        if not self.dry_run:
-            self.run_2to3(updated_files)
-        return outfiles, updated_files
diff --git a/contrib/tools/python3/src/Lib/distutils/command/check.py b/contrib/tools/python3/src/Lib/distutils/command/check.py
deleted file mode 100644
index 73a30f3afd..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/check.py
+++ /dev/null
@@ -1,148 +0,0 @@
-"""distutils.command.check
-
-Implements the Distutils 'check' command.
-"""
-from distutils.core import Command
-from distutils.errors import DistutilsSetupError
-
-try:
-    # docutils is installed
-    from docutils.utils import Reporter
-    from docutils.parsers.rst import Parser
-    from docutils import frontend
-    from docutils import nodes
-
-    class SilentReporter(Reporter):
-
-        def __init__(self, source, report_level, halt_level, stream=None,
-                     debug=0, encoding='ascii', error_handler='replace'):
-            self.messages = []
-            Reporter.__init__(self, source, report_level, halt_level, stream,
-                              debug, encoding, error_handler)
-
-        def system_message(self, level, message, *children, **kwargs):
-            self.messages.append((level, message, children, kwargs))
-            return nodes.system_message(message, level=level,
-                                        type=self.levels[level],
-                                        *children, **kwargs)
-
-    HAS_DOCUTILS = True
-except Exception:
-    # Catch all exceptions because exceptions besides ImportError probably
-    # indicate that docutils is not ported to Py3k.
-    HAS_DOCUTILS = False
-
-class check(Command):
-    """This command checks the meta-data of the package.
-    """
-    description = ("perform some checks on the package")
-    user_options = [('metadata', 'm', 'Verify meta-data'),
-                    ('restructuredtext', 'r',
-                     ('Checks if long string meta-data syntax '
-                      'are reStructuredText-compliant')),
-                    ('strict', 's',
-                     'Will exit with an error if a check fails')]
-
-    boolean_options = ['metadata', 'restructuredtext', 'strict']
-
-    def initialize_options(self):
-        """Sets default values for options."""
-        self.restructuredtext = 0
-        self.metadata = 1
-        self.strict = 0
-        self._warnings = 0
-
-    def finalize_options(self):
-        pass
-
-    def warn(self, msg):
-        """Counts the number of warnings that occurs."""
-        self._warnings += 1
-        return Command.warn(self, msg)
-
-    def run(self):
-        """Runs the command."""
-        # perform the various tests
-        if self.metadata:
-            self.check_metadata()
-        if self.restructuredtext:
-            if HAS_DOCUTILS:
-                self.check_restructuredtext()
-            elif self.strict:
-                raise DistutilsSetupError('The docutils package is needed.')
-
-        # let's raise an error in strict mode, if we have at least
-        # one warning
-        if self.strict and self._warnings > 0:
-            raise DistutilsSetupError('Please correct your package.')
-
-    def check_metadata(self):
-        """Ensures that all required elements of meta-data are supplied.
-
-        Required fields:
-            name, version, URL
-
-        Recommended fields:
-            (author and author_email) or (maintainer and maintainer_email)
-
-        Warns if any are missing.
-        """
-        metadata = self.distribution.metadata
-
-        missing = []
-        for attr in ('name', 'version', 'url'):
-            if not (hasattr(metadata, attr) and getattr(metadata, attr)):
-                missing.append(attr)
-
-        if missing:
-            self.warn("missing required meta-data: %s"  % ', '.join(missing))
-        if metadata.author:
-            if not metadata.author_email:
-                self.warn("missing meta-data: if 'author' supplied, " +
-                          "'author_email' should be supplied too")
-        elif metadata.maintainer:
-            if not metadata.maintainer_email:
-                self.warn("missing meta-data: if 'maintainer' supplied, " +
-                          "'maintainer_email' should be supplied too")
-        else:
-            self.warn("missing meta-data: either (author and author_email) " +
-                      "or (maintainer and maintainer_email) " +
-                      "should be supplied")
-
-    def check_restructuredtext(self):
-        """Checks if the long string fields are reST-compliant."""
-        data = self.distribution.get_long_description()
-        for warning in self._check_rst_data(data):
-            line = warning[-1].get('line')
-            if line is None:
-                warning = warning[1]
-            else:
-                warning = '%s (line %s)' % (warning[1], line)
-            self.warn(warning)
-
-    def _check_rst_data(self, data):
-        """Returns warnings when the provided data doesn't compile."""
-        # the include and csv_table directives need this to be a path
-        source_path = self.distribution.script_name or 'setup.py'
-        parser = Parser()
-        settings = frontend.OptionParser(components=(Parser,)).get_default_values()
-        settings.tab_width = 4
-        settings.pep_references = None
-        settings.rfc_references = None
-        reporter = SilentReporter(source_path,
-                          settings.report_level,
-                          settings.halt_level,
-                          stream=settings.warning_stream,
-                          debug=settings.debug,
-                          encoding=settings.error_encoding,
-                          error_handler=settings.error_encoding_error_handler)
-
-        document = nodes.document(settings, reporter, source=source_path)
-        document.note_source(source_path, -1)
-        try:
-            parser.parse(data, document)
-        except AttributeError as e:
-            reporter.messages.append(
-                (-1, 'Could not finish the parsing: %s.' % e, '', {}))
-
-        return reporter.messages
diff --git a/contrib/tools/python3/src/Lib/distutils/command/clean.py b/contrib/tools/python3/src/Lib/distutils/command/clean.py
deleted file mode 100644
index 0cb2701662..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/clean.py
+++ /dev/null
@@ -1,76 +0,0 @@
-"""distutils.command.clean
-
-Implements the Distutils 'clean' command."""
-
-# contributed by Bastian Kleineidam <calvin@cs.uni-sb.de>, added 2000-03-18
-
-import os
-from distutils.core import Command
-from distutils.dir_util import remove_tree
-from distutils import log
-
-class clean(Command):
-
-    description = "clean up temporary files from 'build' command"
-    user_options = [
-        ('build-base=', 'b',
-         "base build directory (default: 'build.build-base')"),
-        ('build-lib=', None,
-         "build directory for all modules (default: 'build.build-lib')"),
-        ('build-temp=', 't',
-         "temporary build directory (default: 'build.build-temp')"),
-        ('build-scripts=', None,
-         "build directory for scripts (default: 'build.build-scripts')"),
-        ('bdist-base=', None,
-         "temporary directory for built distributions"),
-        ('all', 'a',
-         "remove all build output, not just temporary by-products")
-    ]
-
-    boolean_options = ['all']
-
-    def initialize_options(self):
-        self.build_base = None
-        self.build_lib = None
-        self.build_temp = None
-        self.build_scripts = None
-        self.bdist_base = None
-        self.all = None
-
-    def finalize_options(self):
-        self.set_undefined_options('build',
-                                   ('build_base', 'build_base'),
-                                   ('build_lib', 'build_lib'),
-                                   ('build_scripts', 'build_scripts'),
-                                   ('build_temp', 'build_temp'))
-        self.set_undefined_options('bdist',
-                                   ('bdist_base', 'bdist_base'))
-
-    def run(self):
-        # remove the build/temp.<plat> directory (unless it's already
-        # gone)
-        if os.path.exists(self.build_temp):
-            remove_tree(self.build_temp, dry_run=self.dry_run)
-        else:
-            log.debug("'%s' does not exist -- can't clean it",
-                      self.build_temp)
-
-        if self.all:
-            # remove build directories
-            for directory in (self.build_lib,
-                              self.bdist_base,
-                              self.build_scripts):
-                if os.path.exists(directory):
-                    remove_tree(directory, dry_run=self.dry_run)
-                else:
-                    log.warn("'%s' does not exist -- can't clean it",
-                             directory)
-
-        # just for the heck of it, try to remove the base build directory:
-        # we might have emptied it right now, but if not we don't care
-        if not self.dry_run:
-            try:
-                os.rmdir(self.build_base)
-                log.info("removing '%s'", self.build_base)
-            except OSError:
-                pass
diff --git a/contrib/tools/python3/src/Lib/distutils/command/config.py b/contrib/tools/python3/src/Lib/distutils/command/config.py
deleted file mode 100644
index aeda408e73..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/config.py
+++ /dev/null
@@ -1,344 +0,0 @@
-"""distutils.command.config
-
-Implements the Distutils 'config' command, a (mostly) empty command class
-that exists mainly to be sub-classed by specific module distributions and
-applications.  The idea is that while every "config" command is different,
-at least they're all named the same, and users always see "config" in the
-list of standard commands.  Also, this is a good place to put common
-configure-like tasks: "try to compile this C code", or "figure out where
-this header file lives".
-"""
-
-import os, re
-
-from distutils.core import Command
-from distutils.errors import DistutilsExecError
-from distutils.sysconfig import customize_compiler
-from distutils import log
-
-LANG_EXT = {"c": ".c", "c++": ".cxx"}
-
-class config(Command):
-
-    description = "prepare to build"
-
-    user_options = [
-        ('compiler=', None,
-         "specify the compiler type"),
-        ('cc=', None,
-         "specify the compiler executable"),
-        ('include-dirs=', 'I',
-         "list of directories to search for header files"),
-        ('define=', 'D',
-         "C preprocessor macros to define"),
-        ('undef=', 'U',
-         "C preprocessor macros to undefine"),
-        ('libraries=', 'l',
-         "external C libraries to link with"),
-        ('library-dirs=', 'L',
-         "directories to search for external C libraries"),
-
-        ('noisy', None,
-         "show every action (compile, link, run, ...) taken"),
-        ('dump-source', None,
-         "dump generated source files before attempting to compile them"),
-        ]
-
-
-    # The three standard command methods: since the "config" command
-    # does nothing by default, these are empty.
-
-    def initialize_options(self):
-        self.compiler = None
-        self.cc = None
-        self.include_dirs = None
-        self.libraries = None
-        self.library_dirs = None
-
-        # maximal output for now
-        self.noisy = 1
-        self.dump_source = 1
-
-        # list of temporary files generated along-the-way that we have
-        # to clean at some point
-        self.temp_files = []
-
-    def finalize_options(self):
-        if self.include_dirs is None:
-            self.include_dirs = self.distribution.include_dirs or []
-        elif isinstance(self.include_dirs, str):
-            self.include_dirs = self.include_dirs.split(os.pathsep)
-
-        if self.libraries is None:
-            self.libraries = []
-        elif isinstance(self.libraries, str):
-            self.libraries = [self.libraries]
-
-        if self.library_dirs is None:
-            self.library_dirs = []
-        elif isinstance(self.library_dirs, str):
-            self.library_dirs = self.library_dirs.split(os.pathsep)
-
-    def run(self):
-        pass
-
-    # Utility methods for actual "config" commands.  The interfaces are
-    # loosely based on Autoconf macros of similar names.  Sub-classes
-    # may use these freely.
-
-    def _check_compiler(self):
-        """Check that 'self.compiler' really is a CCompiler object;
-        if not, make it one.
-        """
-        # We do this late, and only on-demand, because this is an expensive
-        # import.
-        from distutils.ccompiler import CCompiler, new_compiler
-        if not isinstance(self.compiler, CCompiler):
-            self.compiler = new_compiler(compiler=self.compiler,
-                                         dry_run=self.dry_run, force=1)
-            customize_compiler(self.compiler)
-            if self.include_dirs:
-                self.compiler.set_include_dirs(self.include_dirs)
-            if self.libraries:
-                self.compiler.set_libraries(self.libraries)
-            if self.library_dirs:
-                self.compiler.set_library_dirs(self.library_dirs)
-
-    def _gen_temp_sourcefile(self, body, headers, lang):
-        filename = "_configtest" + LANG_EXT[lang]
-        with open(filename, "w") as file:
-            if headers:
-                for header in headers:
-                    file.write("#include <%s>\n" % header)
-                file.write("\n")
-            file.write(body)
-            if body[-1] != "\n":
-                file.write("\n")
-        return filename
-
-    def _preprocess(self, body, headers, include_dirs, lang):
-        src = self._gen_temp_sourcefile(body, headers, lang)
-        out = "_configtest.i"
-        self.temp_files.extend([src, out])
-        self.compiler.preprocess(src, out, include_dirs=include_dirs)
-        return (src, out)
-
-    def _compile(self, body, headers, include_dirs, lang):
-        src = self._gen_temp_sourcefile(body, headers, lang)
-        if self.dump_source:
-            dump_file(src, "compiling '%s':" % src)
-        (obj,) = self.compiler.object_filenames([src])
-        self.temp_files.extend([src, obj])
-        self.compiler.compile([src], include_dirs=include_dirs)
-        return (src, obj)
-
-    def _link(self, body, headers, include_dirs, libraries, library_dirs,
-              lang):
-        (src, obj) = self._compile(body, headers, include_dirs, lang)
-        prog = os.path.splitext(os.path.basename(src))[0]
-        self.compiler.link_executable([obj], prog,
-                                      libraries=libraries,
-                                      library_dirs=library_dirs,
-                                      target_lang=lang)
-
-        if self.compiler.exe_extension is not None:
-            prog = prog + self.compiler.exe_extension
-        self.temp_files.append(prog)
-
-        return (src, obj, prog)
-
-    def _clean(self, *filenames):
-        if not filenames:
-            filenames = self.temp_files
-            self.temp_files = []
-        log.info("removing: %s", ' '.join(filenames))
-        for filename in filenames:
-            try:
-                os.remove(filename)
-            except OSError:
-                pass
-
-
-    # XXX these ignore the dry-run flag: what to do, what to do? even if
-    # you want a dry-run build, you still need some sort of configuration
-    # info.  My inclination is to make it up to the real config command to
-    # consult 'dry_run', and assume a default (minimal) configuration if
-    # true.  The problem with trying to do it here is that you'd have to
-    # return either true or false from all the 'try' methods, neither of
-    # which is correct.
-
-    # XXX need access to the header search path and maybe default macros.
-
-    def try_cpp(self, body=None, headers=None, include_dirs=None, lang="c"):
-        """Construct a source file from 'body' (a string containing lines
-        of C/C++ code) and 'headers' (a list of header files to include)
-        and run it through the preprocessor.  Return true if the
-        preprocessor succeeded, false if there were any errors.
-        ('body' probably isn't of much use, but what the heck.)
-        """
-        from distutils.ccompiler import CompileError
-        self._check_compiler()
-        ok = True
-        try:
-            self._preprocess(body, headers, include_dirs, lang)
-        except CompileError:
-            ok = False
-
-        self._clean()
-        return ok
-
-    def search_cpp(self, pattern, body=None, headers=None, include_dirs=None,
-                   lang="c"):
-        """Construct a source file (just like 'try_cpp()'), run it through
-        the preprocessor, and return true if any line of the output matches
-        'pattern'.  'pattern' should either be a compiled regex object or a
-        string containing a regex.  If both 'body' and 'headers' are None,
-        preprocesses an empty file -- which can be useful to determine the
-        symbols the preprocessor and compiler set by default.
-        """
-        self._check_compiler()
-        src, out = self._preprocess(body, headers, include_dirs, lang)
-
-        if isinstance(pattern, str):
-            pattern = re.compile(pattern)
-
-        with open(out) as file:
-            match = False
-            while True:
-                line = file.readline()
-                if line == '':
-                    break
-                if pattern.search(line):
-                    match = True
-                    break
-
-        self._clean()
-        return match
-
-    def try_compile(self, body, headers=None, include_dirs=None, lang="c"):
-        """Try to compile a source file built from 'body' and 'headers'.
-        Return true on success, false otherwise.
-        """
-        from distutils.ccompiler import CompileError
-        self._check_compiler()
-        try:
-            self._compile(body, headers, include_dirs, lang)
-            ok = True
-        except CompileError:
-            ok = False
-
-        log.info(ok and "success!" or "failure.")
-        self._clean()
-        return ok
-
-    def try_link(self, body, headers=None, include_dirs=None, libraries=None,
-                 library_dirs=None, lang="c"):
-        """Try to compile and link a source file, built from 'body' and
-        'headers', to executable form.  Return true on success, false
-        otherwise.
-        """
-        from distutils.ccompiler import CompileError, LinkError
-        self._check_compiler()
-        try:
-            self._link(body, headers, include_dirs,
-                       libraries, library_dirs, lang)
-            ok = True
-        except (CompileError, LinkError):
-            ok = False
-
-        log.info(ok and "success!" or "failure.")
-        self._clean()
-        return ok
-
-    def try_run(self, body, headers=None, include_dirs=None, libraries=None,
-                library_dirs=None, lang="c"):
-        """Try to compile, link to an executable, and run a program
-        built from 'body' and 'headers'.  Return true on success, false
-        otherwise.
-        """
-        from distutils.ccompiler import CompileError, LinkError
-        self._check_compiler()
-        try:
-            src, obj, exe = self._link(body, headers, include_dirs,
-                                       libraries, library_dirs, lang)
-            self.spawn([exe])
-            ok = True
-        except (CompileError, LinkError, DistutilsExecError):
-            ok = False
-
-        log.info(ok and "success!" or "failure.")
-        self._clean()
-        return ok
-
-
-    # -- High-level methods --------------------------------------------
-    # (these are the ones that are actually likely to be useful
-    # when implementing a real-world config command!)
-
-    def check_func(self, func, headers=None, include_dirs=None,
-                   libraries=None, library_dirs=None, decl=0, call=0):
-        """Determine if function 'func' is available by constructing a
-        source file that refers to 'func', and compiles and links it.
-        If everything succeeds, returns true; otherwise returns false.
-
-        The constructed source file starts out by including the header
-        files listed in 'headers'.  If 'decl' is true, it then declares
-        'func' (as "int func()"); you probably shouldn't supply 'headers'
-        and set 'decl' true in the same call, or you might get errors about
-        a conflicting declarations for 'func'.  Finally, the constructed
-        'main()' function either references 'func' or (if 'call' is true)
-        calls it.  'libraries' and 'library_dirs' are used when
-        linking.
-        """
-        self._check_compiler()
-        body = []
-        if decl:
-            body.append("int %s ();" % func)
-        body.append("int main () {")
-        if call:
-            body.append("  %s();" % func)
-        else:
-            body.append("  %s;" % func)
-        body.append("}")
-        body = "\n".join(body) + "\n"
-
-        return self.try_link(body, headers, include_dirs,
-                             libraries, library_dirs)
-
-    def check_lib(self, library, library_dirs=None, headers=None,
-                  include_dirs=None, other_libraries=[]):
-        """Determine if 'library' is available to be linked against,
-        without actually checking that any particular symbols are provided
-        by it.  'headers' will be used in constructing the source file to
-        be compiled, but the only effect of this is to check if all the
-        header files listed are available.  Any libraries listed in
-        'other_libraries' will be included in the link, in case 'library'
-        has symbols that depend on other libraries.
-        """
-        self._check_compiler()
-        return self.try_link("int main (void) { }", headers, include_dirs,
-                             [library] + other_libraries, library_dirs)
-
-    def check_header(self, header, include_dirs=None, library_dirs=None,
-                     lang="c"):
-        """Determine if the system header file named by 'header_file'
-        exists and can be found by the preprocessor; return true if so,
-        false otherwise.
-        """
-        return self.try_cpp(body="/* No body */", headers=[header],
-                            include_dirs=include_dirs)
-
-def dump_file(filename, head=None):
-    """Dumps a file content into log.info.
-
-    If head is not None, will be dumped before the file content.
-    """
-    if head is None:
-        log.info('%s', filename)
-    else:
-        log.info(head)
-    file = open(filename)
-    try:
-        log.info(file.read())
-    finally:
-        file.close()
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install.py b/contrib/tools/python3/src/Lib/distutils/command/install.py
deleted file mode 100644
index 01d5331a63..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install.py
+++ /dev/null
@@ -1,679 +0,0 @@
-"""distutils.command.install
-
-Implements the Distutils 'install' command."""
-
-import sys
-import sysconfig
-import os
-import re
-
-from distutils import log
-from distutils.core import Command
-from distutils.debug import DEBUG
-from distutils.sysconfig import get_config_vars
-from distutils.errors import DistutilsPlatformError
-from distutils.file_util import write_file
-from distutils.util import convert_path, subst_vars, change_root
-from distutils.util import get_platform
-from distutils.errors import DistutilsOptionError
-
-from site import USER_BASE
-from site import USER_SITE
-
-HAS_USER_SITE = (USER_SITE is not None)
-
-# The keys to an installation scheme; if any new types of files are to be
-# installed, be sure to add an entry to every scheme in
-# sysconfig._INSTALL_SCHEMES, and to SCHEME_KEYS here.
-SCHEME_KEYS = ('purelib', 'platlib', 'headers', 'scripts', 'data')
-
-# The following code provides backward-compatible INSTALL_SCHEMES
-# while making the sysconfig module the single point of truth.
-# This makes it easier for OS distributions where they need to
-# alter locations for packages installations in a single place.
-# Note that this module is deprecated (PEP 632); all consumers
-# of this information should switch to using sysconfig directly.
-INSTALL_SCHEMES = {"unix_prefix": {}, "unix_home": {}, "nt": {}}
-
-# Copy from sysconfig._INSTALL_SCHEMES
-for key in SCHEME_KEYS:
-    for distutils_scheme_name, sys_scheme_name in (
-            ("unix_prefix", "posix_prefix"), ("unix_home", "posix_home"),
-            ("nt", "nt")):
-        sys_key = key
-        sys_scheme = sysconfig._INSTALL_SCHEMES[sys_scheme_name]
-        if key == "headers" and key not in sys_scheme:
-            # On POSIX-y platforms, Python will:
-            # - Build from .h files in 'headers' (only there when
-            #   building CPython)
-            # - Install .h files to 'include'
-            # When 'headers' is missing, fall back to 'include'
-            sys_key = 'include'
-        INSTALL_SCHEMES[distutils_scheme_name][key] = sys_scheme[sys_key]
-
-# Transformation to different template format
-for main_key in INSTALL_SCHEMES:
-    for key, value in INSTALL_SCHEMES[main_key].items():
-        # Change all ocurences of {variable} to $variable
-        value = re.sub(r"\{(.+?)\}", r"$\g<1>", value)
-        value = value.replace("$installed_base", "$base")
-        value = value.replace("$py_version_nodot_plat", "$py_version_nodot")
-        if key == "headers":
-            value += "/$dist_name"
-        if sys.version_info >= (3, 9) and key == "platlib":
-            # platlibdir is available since 3.9: bpo-1294959
-            value = value.replace("/lib/", "/$platlibdir/")
-        INSTALL_SCHEMES[main_key][key] = value
-
-# The following part of INSTALL_SCHEMES has a different definition
-# than the one in sysconfig, but because both depend on the site module,
-# the outcomes should be the same.
-if HAS_USER_SITE:
-    INSTALL_SCHEMES['nt_user'] = {
-        'purelib': '$usersite',
-        'platlib': '$usersite',
-        'headers': '$userbase/Python$py_version_nodot/Include/$dist_name',
-        'scripts': '$userbase/Python$py_version_nodot/Scripts',
-        'data'   : '$userbase',
-        }
-
-    INSTALL_SCHEMES['unix_user'] = {
-        'purelib': '$usersite',
-        'platlib': '$usersite',
-        'headers':
-            '$userbase/include/python$py_version_short$abiflags/$dist_name',
-        'scripts': '$userbase/bin',
-        'data'   : '$userbase',
-        }
-
-
-class install(Command):
-
-    description = "install everything from build directory"
-
-    user_options = [
-        # Select installation scheme and set base director(y|ies)
-        ('prefix=', None,
-         "installation prefix"),
-        ('exec-prefix=', None,
-         "(Unix only) prefix for platform-specific files"),
-        ('home=', None,
-         "(Unix only) home directory to install under"),
-
-        # Or, just set the base director(y|ies)
-        ('install-base=', None,
-         "base installation directory (instead of --prefix or --home)"),
-        ('install-platbase=', None,
-         "base installation directory for platform-specific files " +
-         "(instead of --exec-prefix or --home)"),
-        ('root=', None,
-         "install everything relative to this alternate root directory"),
-
-        # Or, explicitly set the installation scheme
-        ('install-purelib=', None,
-         "installation directory for pure Python module distributions"),
-        ('install-platlib=', None,
-         "installation directory for non-pure module distributions"),
-        ('install-lib=', None,
-         "installation directory for all module distributions " +
-         "(overrides --install-purelib and --install-platlib)"),
-
-        ('install-headers=', None,
-         "installation directory for C/C++ headers"),
-        ('install-scripts=', None,
-         "installation directory for Python scripts"),
-        ('install-data=', None,
-         "installation directory for data files"),
-
-        # Byte-compilation options -- see install_lib.py for details, as
-        # these are duplicated from there (but only install_lib does
-        # anything with them).
-        ('compile', 'c', "compile .py to .pyc [default]"),
-        ('no-compile', None, "don't compile .py files"),
-        ('optimize=', 'O',
-         "also compile with optimization: -O1 for \"python -O\", "
-         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
-
-        # Miscellaneous control options
-        ('force', 'f',
-         "force installation (overwrite any existing files)"),
-        ('skip-build', None,
-         "skip rebuilding everything (for testing/debugging)"),
-
-        # Where to install documentation (eventually!)
-        #('doc-format=', None, "format of documentation to generate"),
-        #('install-man=', None, "directory for Unix man pages"),
-        #('install-html=', None, "directory for HTML documentation"),
-        #('install-info=', None, "directory for GNU info files"),
-
-        ('record=', None,
-         "filename in which to record list of installed files"),
-        ]
-
-    boolean_options = ['compile', 'force', 'skip-build']
-
-    if HAS_USER_SITE:
-        user_options.append(('user', None,
-                             "install in user site-package '%s'" % USER_SITE))
-        boolean_options.append('user')
-
-    negative_opt = {'no-compile' : 'compile'}
-
-
-    def initialize_options(self):
-        """Initializes options."""
-        # High-level options: these select both an installation base
-        # and scheme.
-        self.prefix = None
-        self.exec_prefix = None
-        self.home = None
-        self.user = 0
-
-        # These select only the installation base; it's up to the user to
-        # specify the installation scheme (currently, that means supplying
-        # the --install-{platlib,purelib,scripts,data} options).
-        self.install_base = None
-        self.install_platbase = None
-        self.root = None
-
-        # These options are the actual installation directories; if not
-        # supplied by the user, they are filled in using the installation
-        # scheme implied by prefix/exec-prefix/home and the contents of
-        # that installation scheme.
-        self.install_purelib = None     # for pure module distributions
-        self.install_platlib = None     # non-pure (dists w/ extensions)
-        self.install_headers = None     # for C/C++ headers
-        self.install_lib = None         # set to either purelib or platlib
-        self.install_scripts = None
-        self.install_data = None
-        if HAS_USER_SITE:
-            self.install_userbase = USER_BASE
-            self.install_usersite = USER_SITE
-
-        self.compile = None
-        self.optimize = None
-
-        # Deprecated
-        # These two are for putting non-packagized distributions into their
-        # own directory and creating a .pth file if it makes sense.
-        # 'extra_path' comes from the setup file; 'install_path_file' can
-        # be turned off if it makes no sense to install a .pth file.  (But
-        # better to install it uselessly than to guess wrong and not
-        # install it when it's necessary and would be used!)  Currently,
-        # 'install_path_file' is always true unless some outsider meddles
-        # with it.
-        self.extra_path = None
-        self.install_path_file = 1
-
-        # 'force' forces installation, even if target files are not
-        # out-of-date.  'skip_build' skips running the "build" command,
-        # handy if you know it's not necessary.  'warn_dir' (which is *not*
-        # a user option, it's just there so the bdist_* commands can turn
-        # it off) determines whether we warn about installing to a
-        # directory not in sys.path.
-        self.force = 0
-        self.skip_build = 0
-        self.warn_dir = 1
-
-        # These are only here as a conduit from the 'build' command to the
-        # 'install_*' commands that do the real work.  ('build_base' isn't
-        # actually used anywhere, but it might be useful in future.)  They
-        # are not user options, because if the user told the install
-        # command where the build directory is, that wouldn't affect the
-        # build command.
-        self.build_base = None
-        self.build_lib = None
-
-        # Not defined yet because we don't know anything about
-        # documentation yet.
-        #self.install_man = None
-        #self.install_html = None
-        #self.install_info = None
-
-        self.record = None
-
-
-    # -- Option finalizing methods -------------------------------------
-    # (This is rather more involved than for most commands,
-    # because this is where the policy for installing third-
-    # party Python modules on various platforms given a wide
-    # array of user input is decided.  Yes, it's quite complex!)
-
-    def finalize_options(self):
-        """Finalizes options."""
-        # This method (and its helpers, like 'finalize_unix()',
-        # 'finalize_other()', and 'select_scheme()') is where the default
-        # installation directories for modules, extension modules, and
-        # anything else we care to install from a Python module
-        # distribution.  Thus, this code makes a pretty important policy
-        # statement about how third-party stuff is added to a Python
-        # installation!  Note that the actual work of installation is done
-        # by the relatively simple 'install_*' commands; they just take
-        # their orders from the installation directory options determined
-        # here.
-
-        # Check for errors/inconsistencies in the options; first, stuff
-        # that's wrong on any platform.
-
-        if ((self.prefix or self.exec_prefix or self.home) and
-            (self.install_base or self.install_platbase)):
-            raise DistutilsOptionError(
-                   "must supply either prefix/exec-prefix/home or " +
-                   "install-base/install-platbase -- not both")
-
-        if self.home and (self.prefix or self.exec_prefix):
-            raise DistutilsOptionError(
-                  "must supply either home or prefix/exec-prefix -- not both")
-
-        if self.user and (self.prefix or self.exec_prefix or self.home or
-                self.install_base or self.install_platbase):
-            raise DistutilsOptionError("can't combine user with prefix, "
-                                       "exec_prefix/home, or install_(plat)base")
-
-        # Next, stuff that's wrong (or dubious) only on certain platforms.
-        if os.name != "posix":
-            if self.exec_prefix:
-                self.warn("exec-prefix option ignored on this platform")
-                self.exec_prefix = None
-
-        # Now the interesting logic -- so interesting that we farm it out
-        # to other methods.  The goal of these methods is to set the final
-        # values for the install_{lib,scripts,data,...}  options, using as
-        # input a heady brew of prefix, exec_prefix, home, install_base,
-        # install_platbase, user-supplied versions of
-        # install_{purelib,platlib,lib,scripts,data,...}, and the
-        # INSTALL_SCHEME dictionary above.  Phew!
-
-        self.dump_dirs("pre-finalize_{unix,other}")
-
-        if os.name == 'posix':
-            self.finalize_unix()
-        else:
-            self.finalize_other()
-
-        self.dump_dirs("post-finalize_{unix,other}()")
-
-        # Expand configuration variables, tilde, etc. in self.install_base
-        # and self.install_platbase -- that way, we can use $base or
-        # $platbase in the other installation directories and not worry
-        # about needing recursive variable expansion (shudder).
-
-        py_version = sys.version.split()[0]
-        (prefix, exec_prefix) = get_config_vars('prefix', 'exec_prefix')
-        try:
-            abiflags = sys.abiflags
-        except AttributeError:
-            # sys.abiflags may not be defined on all platforms.
-            abiflags = ''
-        self.config_vars = {'dist_name': self.distribution.get_name(),
-                            'dist_version': self.distribution.get_version(),
-                            'dist_fullname': self.distribution.get_fullname(),
-                            'py_version': py_version,
-                            'py_version_short': '%d.%d' % sys.version_info[:2],
-                            'py_version_nodot': '%d%d' % sys.version_info[:2],
-                            'sys_prefix': prefix,
-                            'prefix': prefix,
-                            'sys_exec_prefix': exec_prefix,
-                            'exec_prefix': exec_prefix,
-                            'abiflags': abiflags,
-                            'platlibdir': sys.platlibdir,
-                           }
-
-        if HAS_USER_SITE:
-            self.config_vars['userbase'] = self.install_userbase
-            self.config_vars['usersite'] = self.install_usersite
-
-        if sysconfig.is_python_build(True):
-            self.config_vars['srcdir'] = sysconfig.get_config_var('srcdir')
-
-        self.expand_basedirs()
-
-        self.dump_dirs("post-expand_basedirs()")
-
-        # Now define config vars for the base directories so we can expand
-        # everything else.
-        self.config_vars['base'] = self.install_base
-        self.config_vars['platbase'] = self.install_platbase
-
-        if DEBUG:
-            from pprint import pprint
-            print("config vars:")
-            pprint(self.config_vars)
-
-        # Expand "~" and configuration variables in the installation
-        # directories.
-        self.expand_dirs()
-
-        self.dump_dirs("post-expand_dirs()")
-
-        # Create directories in the home dir:
-        if self.user:
-            self.create_home_path()
-
-        # Pick the actual directory to install all modules to: either
-        # install_purelib or install_platlib, depending on whether this
-        # module distribution is pure or not.  Of course, if the user
-        # already specified install_lib, use their selection.
-        if self.install_lib is None:
-            if self.distribution.ext_modules: # has extensions: non-pure
-                self.install_lib = self.install_platlib
-            else:
-                self.install_lib = self.install_purelib
-
-
-        # Convert directories from Unix /-separated syntax to the local
-        # convention.
-        self.convert_paths('lib', 'purelib', 'platlib',
-                           'scripts', 'data', 'headers')
-        if HAS_USER_SITE:
-            self.convert_paths('userbase', 'usersite')
-
-        # Deprecated
-        # Well, we're not actually fully completely finalized yet: we still
-        # have to deal with 'extra_path', which is the hack for allowing
-        # non-packagized module distributions (hello, Numerical Python!) to
-        # get their own directories.
-        self.handle_extra_path()
-        self.install_libbase = self.install_lib # needed for .pth file
-        self.install_lib = os.path.join(self.install_lib, self.extra_dirs)
-
-        # If a new root directory was supplied, make all the installation
-        # dirs relative to it.
-        if self.root is not None:
-            self.change_roots('libbase', 'lib', 'purelib', 'platlib',
-                              'scripts', 'data', 'headers')
-
-        self.dump_dirs("after prepending root")
-
-        # Find out the build directories, ie. where to install from.
-        self.set_undefined_options('build',
-                                   ('build_base', 'build_base'),
-                                   ('build_lib', 'build_lib'))
-
-        # Punt on doc directories for now -- after all, we're punting on
-        # documentation completely!
-
-    def dump_dirs(self, msg):
-        """Dumps the list of user options."""
-        if not DEBUG:
-            return
-        from distutils.fancy_getopt import longopt_xlate
-        log.debug(msg + ":")
-        for opt in self.user_options:
-            opt_name = opt[0]
-            if opt_name[-1] == "=":
-                opt_name = opt_name[0:-1]
-            if opt_name in self.negative_opt:
-                opt_name = self.negative_opt[opt_name]
-                opt_name = opt_name.translate(longopt_xlate)
-                val = not getattr(self, opt_name)
-            else:
-                opt_name = opt_name.translate(longopt_xlate)
-                val = getattr(self, opt_name)
-            log.debug("  %s: %s", opt_name, val)
-
-    def finalize_unix(self):
-        """Finalizes options for posix platforms."""
-        if self.install_base is not None or self.install_platbase is not None:
-            if ((self.install_lib is None and
-                 self.install_purelib is None and
-                 self.install_platlib is None) or
-                self.install_headers is None or
-                self.install_scripts is None or
-                self.install_data is None):
-                raise DistutilsOptionError(
-                      "install-base or install-platbase supplied, but "
-                      "installation scheme is incomplete")
-            return
-
-        if self.user:
-            if self.install_userbase is None:
-                raise DistutilsPlatformError(
-                    "User base directory is not specified")
-            self.install_base = self.install_platbase = self.install_userbase
-            self.select_scheme("unix_user")
-        elif self.home is not None:
-            self.install_base = self.install_platbase = self.home
-            self.select_scheme("unix_home")
-        else:
-            if self.prefix is None:
-                if self.exec_prefix is not None:
-                    raise DistutilsOptionError(
-                          "must not supply exec-prefix without prefix")
-
-                self.prefix = os.path.normpath(sys.prefix)
-                self.exec_prefix = os.path.normpath(sys.exec_prefix)
-
-            else:
-                if self.exec_prefix is None:
-                    self.exec_prefix = self.prefix
-
-            self.install_base = self.prefix
-            self.install_platbase = self.exec_prefix
-            self.select_scheme("unix_prefix")
-
-    def finalize_other(self):
-        """Finalizes options for non-posix platforms"""
-        if self.user:
-            if self.install_userbase is None:
-                raise DistutilsPlatformError(
-                    "User base directory is not specified")
-            self.install_base = self.install_platbase = self.install_userbase
-            self.select_scheme(os.name + "_user")
-        elif self.home is not None:
-            self.install_base = self.install_platbase = self.home
-            self.select_scheme("unix_home")
-        else:
-            if self.prefix is None:
-                self.prefix = os.path.normpath(sys.prefix)
-
-            self.install_base = self.install_platbase = self.prefix
-            try:
-                self.select_scheme(os.name)
-            except KeyError:
-                raise DistutilsPlatformError(
-                      "I don't know how to install stuff on '%s'" % os.name)
-
-    def select_scheme(self, name):
-        """Sets the install directories by applying the install schemes."""
-        # it's the caller's problem if they supply a bad name!
-        scheme = INSTALL_SCHEMES[name]
-        for key in SCHEME_KEYS:
-            attrname = 'install_' + key
-            if getattr(self, attrname) is None:
-                setattr(self, attrname, scheme[key])
-
-    def _expand_attrs(self, attrs):
-        for attr in attrs:
-            val = getattr(self, attr)
-            if val is not None:
-                if os.name == 'posix' or os.name == 'nt':
-                    val = os.path.expanduser(val)
-                val = subst_vars(val, self.config_vars)
-                setattr(self, attr, val)
-
-    def expand_basedirs(self):
-        """Calls `os.path.expanduser` on install_base, install_platbase and
-        root."""
-        self._expand_attrs(['install_base', 'install_platbase', 'root'])
-
-    def expand_dirs(self):
-        """Calls `os.path.expanduser` on install dirs."""
-        self._expand_attrs(['install_purelib', 'install_platlib',
-                            'install_lib', 'install_headers',
-                            'install_scripts', 'install_data',])
-
-    def convert_paths(self, *names):
-        """Call `convert_path` over `names`."""
-        for name in names:
-            attr = "install_" + name
-            setattr(self, attr, convert_path(getattr(self, attr)))
-
-    def handle_extra_path(self):
-        """Set `path_file` and `extra_dirs` using `extra_path`."""
-        if self.extra_path is None:
-            self.extra_path = self.distribution.extra_path
-
-        if self.extra_path is not None:
-            log.warn(
-                "Distribution option extra_path is deprecated. "
-                "See issue27919 for details."
-            )
-            if isinstance(self.extra_path, str):
-                self.extra_path = self.extra_path.split(',')
-
-            if len(self.extra_path) == 1:
-                path_file = extra_dirs = self.extra_path[0]
-            elif len(self.extra_path) == 2:
-                path_file, extra_dirs = self.extra_path
-            else:
-                raise DistutilsOptionError(
-                      "'extra_path' option must be a list, tuple, or "
-                      "comma-separated string with 1 or 2 elements")
-
-            # convert to local form in case Unix notation used (as it
-            # should be in setup scripts)
-            extra_dirs = convert_path(extra_dirs)
-        else:
-            path_file = None
-            extra_dirs = ''
-
-        # XXX should we warn if path_file and not extra_dirs? (in which
-        # case the path file would be harmless but pointless)
-        self.path_file = path_file
-        self.extra_dirs = extra_dirs
-
-    def change_roots(self, *names):
-        """Change the install directories pointed by name using root."""
-        for name in names:
-            attr = "install_" + name
-            setattr(self, attr, change_root(self.root, getattr(self, attr)))
-
-    def create_home_path(self):
-        """Create directories under ~."""
-        if not self.user:
-            return
-        home = convert_path(os.path.expanduser("~"))
-        for name, path in self.config_vars.items():
-            if path.startswith(home) and not os.path.isdir(path):
-                self.debug_print("os.makedirs('%s', 0o700)" % path)
-                os.makedirs(path, 0o700)
-
-    # -- Command execution methods -------------------------------------
-
-    def run(self):
-        """Runs the command."""
-        # Obviously have to build before we can install
-        if not self.skip_build:
-            self.run_command('build')
-            # If we built for any other platform, we can't install.
-            build_plat = self.distribution.get_command_obj('build').plat_name
-            # check warn_dir - it is a clue that the 'install' is happening
-            # internally, and not to sys.path, so we don't check the platform
-            # matches what we are running.
-            if self.warn_dir and build_plat != get_platform():
-                raise DistutilsPlatformError("Can't install when "
-                                             "cross-compiling")
-
-        # Run all sub-commands (at least those that need to be run)
-        for cmd_name in self.get_sub_commands():
-            self.run_command(cmd_name)
-
-        if self.path_file:
-            self.create_path_file()
-
-        # write list of installed files, if requested.
-        if self.record:
-            outputs = self.get_outputs()
-            if self.root:               # strip any package prefix
-                root_len = len(self.root)
-                for counter in range(len(outputs)):
-                    outputs[counter] = outputs[counter][root_len:]
-            self.execute(write_file,
-                         (self.record, outputs),
-                         "writing list of installed files to '%s'" %
-                         self.record)
-
-        sys_path = map(os.path.normpath, sys.path)
-        sys_path = map(os.path.normcase, sys_path)
-        install_lib = os.path.normcase(os.path.normpath(self.install_lib))
-        if (self.warn_dir and
-            not (self.path_file and self.install_path_file) and
-            install_lib not in sys_path):
-            log.debug(("modules installed to '%s', which is not in "
-                       "Python's module search path (sys.path) -- "
-                       "you'll have to change the search path yourself"),
-                       self.install_lib)
-
-    def create_path_file(self):
-        """Creates the .pth file"""
-        filename = os.path.join(self.install_libbase,
-                                self.path_file + ".pth")
-        if self.install_path_file:
-            self.execute(write_file,
-                         (filename, [self.extra_dirs]),
-                         "creating %s" % filename)
-        else:
-            self.warn("path file '%s' not created" % filename)
-
-
-    # -- Reporting methods ---------------------------------------------
-
-    def get_outputs(self):
-        """Assembles the outputs of all the sub-commands."""
-        outputs = []
-        for cmd_name in self.get_sub_commands():
-            cmd = self.get_finalized_command(cmd_name)
-            # Add the contents of cmd.get_outputs(), ensuring
-            # that outputs doesn't contain duplicate entries
-            for filename in cmd.get_outputs():
-                if filename not in outputs:
-                    outputs.append(filename)
-
-        if self.path_file and self.install_path_file:
-            outputs.append(os.path.join(self.install_libbase,
-                                        self.path_file + ".pth"))
-
-        return outputs
-
-    def get_inputs(self):
-        """Returns the inputs of all the sub-commands"""
-        # XXX gee, this looks familiar ;-(
-        inputs = []
-        for cmd_name in self.get_sub_commands():
-            cmd = self.get_finalized_command(cmd_name)
-            inputs.extend(cmd.get_inputs())
-
-        return inputs
-
-    # -- Predicates for sub-command list -------------------------------
-
-    def has_lib(self):
-        """Returns true if the current distribution has any Python
-        modules to install."""
-        return (self.distribution.has_pure_modules() or
-                self.distribution.has_ext_modules())
-
-    def has_headers(self):
-        """Returns true if the current distribution has any headers to
-        install."""
-        return self.distribution.has_headers()
-
-    def has_scripts(self):
-        """Returns true if the current distribution has any scripts to.
-        install."""
-        return self.distribution.has_scripts()
-
-    def has_data(self):
-        """Returns true if the current distribution has any data to.
-        install."""
-        return self.distribution.has_data_files()
-
-    # 'sub_commands': a list of commands this command might have to run to
-    # get its work done.  See cmd.py for more info.
-    sub_commands = [('install_lib',     has_lib),
-                    ('install_headers', has_headers),
-                    ('install_scripts', has_scripts),
-                    ('install_data',    has_data),
-                    ('install_egg_info', lambda self:True),
-                   ]
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install_data.py b/contrib/tools/python3/src/Lib/distutils/command/install_data.py
deleted file mode 100644
index 947cd76a99..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install_data.py
+++ /dev/null
@@ -1,79 +0,0 @@
-"""distutils.command.install_data
-
-Implements the Distutils 'install_data' command, for installing
-platform-independent data files."""
-
-# contributed by Bastian Kleineidam
-
-import os
-from distutils.core import Command
-from distutils.util import change_root, convert_path
-
-class install_data(Command):
-
-    description = "install data files"
-
-    user_options = [
-        ('install-dir=', 'd',
-         "base directory for installing data files "
-         "(default: installation base dir)"),
-        ('root=', None,
-         "install everything relative to this alternate root directory"),
-        ('force', 'f', "force installation (overwrite existing files)"),
-        ]
-
-    boolean_options = ['force']
-
-    def initialize_options(self):
-        self.install_dir = None
-        self.outfiles = []
-        self.root = None
-        self.force = 0
-        self.data_files = self.distribution.data_files
-        self.warn_dir = 1
-
-    def finalize_options(self):
-        self.set_undefined_options('install',
-                                   ('install_data', 'install_dir'),
-                                   ('root', 'root'),
-                                   ('force', 'force'),
-                                  )
-
-    def run(self):
-        self.mkpath(self.install_dir)
-        for f in self.data_files:
-            if isinstance(f, str):
-                # it's a simple file, so copy it
-                f = convert_path(f)
-                if self.warn_dir:
-                    self.warn("setup script did not provide a directory for "
-                              "'%s' -- installing right in '%s'" %
-                              (f, self.install_dir))
-                (out, _) = self.copy_file(f, self.install_dir)
-                self.outfiles.append(out)
-            else:
-                # it's a tuple with path to install to and a list of files
-                dir = convert_path(f[0])
-                if not os.path.isabs(dir):
-                    dir = os.path.join(self.install_dir, dir)
-                elif self.root:
-                    dir = change_root(self.root, dir)
-                self.mkpath(dir)
-
-                if f[1] == []:
-                    # If there are no files listed, the user must be
-                    # trying to create an empty directory, so add the
-                    # directory to the list of output files.
-                    self.outfiles.append(dir)
-                else:
-                    # Copy files, adding them to the list of output files.
-                    for data in f[1]:
-                        data = convert_path(data)
-                        (out, _) = self.copy_file(data, dir)
-                        self.outfiles.append(out)
-
-    def get_inputs(self):
-        return self.data_files or []
-
-    def get_outputs(self):
-        return self.outfiles
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install_egg_info.py b/contrib/tools/python3/src/Lib/distutils/command/install_egg_info.py
deleted file mode 100644
index 0ddc7367cc..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install_egg_info.py
+++ /dev/null
@@ -1,77 +0,0 @@
-"""distutils.command.install_egg_info
-
-Implements the Distutils 'install_egg_info' command, for installing
-a package's PKG-INFO metadata."""
-
-
-from distutils.cmd import Command
-from distutils import log, dir_util
-import os, sys, re
-
-class install_egg_info(Command):
-    """Install an .egg-info file for the package"""
-
-    description = "Install package's PKG-INFO metadata as an .egg-info file"
-    user_options = [
-        ('install-dir=', 'd', "directory to install to"),
-    ]
-
-    def initialize_options(self):
-        self.install_dir = None
-
-    def finalize_options(self):
-        self.set_undefined_options('install_lib',('install_dir','install_dir'))
-        basename = "%s-%s-py%d.%d.egg-info" % (
-            to_filename(safe_name(self.distribution.get_name())),
-            to_filename(safe_version(self.distribution.get_version())),
-            *sys.version_info[:2]
-        )
-        self.target = os.path.join(self.install_dir, basename)
-        self.outputs = [self.target]
-
-    def run(self):
-        target = self.target
-        if os.path.isdir(target) and not os.path.islink(target):
-            dir_util.remove_tree(target, dry_run=self.dry_run)
-        elif os.path.exists(target):
-            self.execute(os.unlink,(self.target,),"Removing "+target)
-        elif not os.path.isdir(self.install_dir):
-            self.execute(os.makedirs, (self.install_dir,),
-                         "Creating "+self.install_dir)
-        log.info("Writing %s", target)
-        if not self.dry_run:
-            with open(target, 'w', encoding='UTF-8') as f:
-                self.distribution.metadata.write_pkg_file(f)
-
-    def get_outputs(self):
-        return self.outputs
-
-
-# The following routines are taken from setuptools' pkg_resources module and
-# can be replaced by importing them from pkg_resources once it is included
-# in the stdlib.
-
-def safe_name(name):
-    """Convert an arbitrary string to a standard distribution name
-
-    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
-    """
-    return re.sub('[^A-Za-z0-9.]+', '-', name)
-
-
-def safe_version(version):
-    """Convert an arbitrary string to a standard version string
-
-    Spaces become dots, and all other non-alphanumeric characters become
-    dashes, with runs of multiple dashes condensed to a single dash.
-    """
-    version = version.replace(' ','.')
-    return re.sub('[^A-Za-z0-9.]+', '-', version)
-
-
-def to_filename(name):
-    """Convert a project or version name to its filename-escaped form
-
-    Any '-' characters are currently replaced with '_'.
-    """
-    return name.replace('-','_')
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install_headers.py b/contrib/tools/python3/src/Lib/distutils/command/install_headers.py
deleted file mode 100644
index 9bb0b18dc0..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install_headers.py
+++ /dev/null
@@ -1,47 +0,0 @@
-"""distutils.command.install_headers
-
-Implements the Distutils 'install_headers' command, to install C/C++ header
-files to the Python include directory."""
-
-from distutils.core import Command
-
-
-# XXX force is never used
-class install_headers(Command):
-
-    description = "install C/C++ header files"
-
-    user_options = [('install-dir=', 'd',
-                     "directory to install header files to"),
-                    ('force', 'f',
-                     "force installation (overwrite existing files)"),
-                   ]
-
-    boolean_options = ['force']
-
-    def initialize_options(self):
-        self.install_dir = None
-        self.force = 0
-        self.outfiles = []
-
-    def finalize_options(self):
-        self.set_undefined_options('install',
-                                   ('install_headers', 'install_dir'),
-                                   ('force', 'force'))
-
-
-    def run(self):
-        headers = self.distribution.headers
-        if not headers:
-            return
-
-        self.mkpath(self.install_dir)
-        for header in headers:
-            (out, _) = self.copy_file(header, self.install_dir)
-            self.outfiles.append(out)
-
-    def get_inputs(self):
-        return self.distribution.headers or []
-
-    def get_outputs(self):
-        return self.outfiles
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install_lib.py b/contrib/tools/python3/src/Lib/distutils/command/install_lib.py
deleted file mode 100644
index 6154cf0943..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install_lib.py
+++ /dev/null
@@ -1,217 +0,0 @@
-"""distutils.command.install_lib
-
-Implements the Distutils 'install_lib' command
-(install all Python modules)."""
-
-import os
-import importlib.util
-import sys
-
-from distutils.core import Command
-from distutils.errors import DistutilsOptionError
-
-
-# Extension for Python source files.
-PYTHON_SOURCE_EXTENSION = ".py"
-
-class install_lib(Command):
-
-    description = "install all Python modules (extensions and pure Python)"
-
-    # The byte-compilation options are a tad confusing.  Here are the
-    # possible scenarios:
-    #   1) no compilation at all (--no-compile --no-optimize)
-    #   2) compile .pyc only (--compile --no-optimize; default)
-    #   3) compile .pyc and "opt-1" .pyc (--compile --optimize)
-    #   4) compile "opt-1" .pyc only (--no-compile --optimize)
-    #   5) compile .pyc and "opt-2" .pyc (--compile --optimize-more)
-    #   6) compile "opt-2" .pyc only (--no-compile --optimize-more)
-    #
-    # The UI for this is two options, 'compile' and 'optimize'.
-    # 'compile' is strictly boolean, and only decides whether to
-    # generate .pyc files.  'optimize' is three-way (0, 1, or 2), and
-    # decides both whether to generate .pyc files and what level of
-    # optimization to use.
-
-    user_options = [
-        ('install-dir=', 'd', "directory to install to"),
-        ('build-dir=','b', "build directory (where to install from)"),
-        ('force', 'f', "force installation (overwrite existing files)"),
-        ('compile', 'c', "compile .py to .pyc [default]"),
-        ('no-compile', None, "don't compile .py files"),
-        ('optimize=', 'O',
-         "also compile with optimization: -O1 for \"python -O\", "
-         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
-        ('skip-build', None, "skip the build steps"),
-        ]
-
-    boolean_options = ['force', 'compile', 'skip-build']
-    negative_opt = {'no-compile' : 'compile'}
-
-    def initialize_options(self):
-        # let the 'install' command dictate our installation directory
-        self.install_dir = None
-        self.build_dir = None
-        self.force = 0
-        self.compile = None
-        self.optimize = None
-        self.skip_build = None
-
-    def finalize_options(self):
-        # Get all the information we need to install pure Python modules
-        # from the umbrella 'install' command -- build (source) directory,
-        # install (target) directory, and whether to compile .py files.
-        self.set_undefined_options('install',
-                                   ('build_lib', 'build_dir'),
-                                   ('install_lib', 'install_dir'),
-                                   ('force', 'force'),
-                                   ('compile', 'compile'),
-                                   ('optimize', 'optimize'),
-                                   ('skip_build', 'skip_build'),
-                                  )
-
-        if self.compile is None:
-            self.compile = True
-        if self.optimize is None:
-            self.optimize = False
-
-        if not isinstance(self.optimize, int):
-            try:
-                self.optimize = int(self.optimize)
-                if self.optimize not in (0, 1, 2):
-                    raise AssertionError
-            except (ValueError, AssertionError):
-                raise DistutilsOptionError("optimize must be 0, 1, or 2")
-
-    def run(self):
-        # Make sure we have built everything we need first
-        self.build()
-
-        # Install everything: simply dump the entire contents of the build
-        # directory to the installation directory (that's the beauty of
-        # having a build directory!)
-        outfiles = self.install()
-
-        # (Optionally) compile .py to .pyc
-        if outfiles is not None and self.distribution.has_pure_modules():
-            self.byte_compile(outfiles)
-
-    # -- Top-level worker functions ------------------------------------
-    # (called from 'run()')
-
-    def build(self):
-        if not self.skip_build:
-            if self.distribution.has_pure_modules():
-                self.run_command('build_py')
-            if self.distribution.has_ext_modules():
-                self.run_command('build_ext')
-
-    def install(self):
-        if os.path.isdir(self.build_dir):
-            outfiles = self.copy_tree(self.build_dir, self.install_dir)
-        else:
-            self.warn("'%s' does not exist -- no Python modules to install" %
-                      self.build_dir)
-            return
-        return outfiles
-
-    def byte_compile(self, files):
-        if sys.dont_write_bytecode:
-            self.warn('byte-compiling is disabled, skipping.')
-            return
-
-        from distutils.util import byte_compile
-
-        # Get the "--root" directory supplied to the "install" command,
-        # and use it as a prefix to strip off the purported filename
-        # encoded in bytecode files.  This is far from complete, but it
-        # should at least generate usable bytecode in RPM distributions.
-        install_root = self.get_finalized_command('install').root
-
-        if self.compile:
-            byte_compile(files, optimize=0,
-                         force=self.force, prefix=install_root,
-                         dry_run=self.dry_run)
-        if self.optimize > 0:
-            byte_compile(files, optimize=self.optimize,
-                         force=self.force, prefix=install_root,
-                         verbose=self.verbose, dry_run=self.dry_run)
-
-
-    # -- Utility methods -----------------------------------------------
-
-    def _mutate_outputs(self, has_any, build_cmd, cmd_option, output_dir):
-        if not has_any:
-            return []
-
-        build_cmd = self.get_finalized_command(build_cmd)
-        build_files = build_cmd.get_outputs()
-        build_dir = getattr(build_cmd, cmd_option)
-
-        prefix_len = len(build_dir) + len(os.sep)
-        outputs = []
-        for file in build_files:
-            outputs.append(os.path.join(output_dir, file[prefix_len:]))
-
-        return outputs
-
-    def _bytecode_filenames(self, py_filenames):
-        bytecode_files = []
-        for py_file in py_filenames:
-            # Since build_py handles package data installation, the
-            # list of outputs can contain more than just .py files.
-            # Make sure we only report bytecode for the .py files.
-            ext = os.path.splitext(os.path.normcase(py_file))[1]
-            if ext != PYTHON_SOURCE_EXTENSION:
-                continue
-            if self.compile:
-                bytecode_files.append(importlib.util.cache_from_source(
-                    py_file, optimization=''))
-            if self.optimize > 0:
-                bytecode_files.append(importlib.util.cache_from_source(
-                    py_file, optimization=self.optimize))
-
-        return bytecode_files
-
-
-    # -- External interface --------------------------------------------
-    # (called by outsiders)
-
-    def get_outputs(self):
-        """Return the list of files that would be installed if this command
-        were actually run.  Not affected by the "dry-run" flag or whether
-        modules have actually been built yet.
-        """
-        pure_outputs = \
-            self._mutate_outputs(self.distribution.has_pure_modules(),
-                                 'build_py', 'build_lib',
-                                 self.install_dir)
-        if self.compile:
-            bytecode_outputs = self._bytecode_filenames(pure_outputs)
-        else:
-            bytecode_outputs = []
-
-        ext_outputs = \
-            self._mutate_outputs(self.distribution.has_ext_modules(),
-                                 'build_ext', 'build_lib',
-                                 self.install_dir)
-
-        return pure_outputs + bytecode_outputs + ext_outputs
-
-    def get_inputs(self):
-        """Get the list of files that are input to this command, ie. the
-        files that get installed as they are named in the build tree.
-        The files in this list correspond one-to-one to the output
-        filenames returned by 'get_outputs()'.
-        """
-        inputs = []
-
-        if self.distribution.has_pure_modules():
-            build_py = self.get_finalized_command('build_py')
-            inputs.extend(build_py.get_outputs())
-
-        if self.distribution.has_ext_modules():
-            build_ext = self.get_finalized_command('build_ext')
-            inputs.extend(build_ext.get_outputs())
-
-        return inputs
diff --git a/contrib/tools/python3/src/Lib/distutils/command/install_scripts.py b/contrib/tools/python3/src/Lib/distutils/command/install_scripts.py
deleted file mode 100644
index 31a1130ee5..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/install_scripts.py
+++ /dev/null
@@ -1,60 +0,0 @@
-"""distutils.command.install_scripts
-
-Implements the Distutils 'install_scripts' command, for installing
-Python scripts."""
-
-# contributed by Bastian Kleineidam
-
-import os
-from distutils.core import Command
-from distutils import log
-from stat import ST_MODE
-
-
-class install_scripts(Command):
-
-    description = "install scripts (Python or otherwise)"
-
-    user_options = [
-        ('install-dir=', 'd', "directory to install scripts to"),
-        ('build-dir=','b', "build directory (where to install from)"),
-        ('force', 'f', "force installation (overwrite existing files)"),
-        ('skip-build', None, "skip the build steps"),
-    ]
-
-    boolean_options = ['force', 'skip-build']
-
-    def initialize_options(self):
-        self.install_dir = None
-        self.force = 0
-        self.build_dir = None
-        self.skip_build = None
-
-    def finalize_options(self):
-        self.set_undefined_options('build', ('build_scripts', 'build_dir'))
-        self.set_undefined_options('install',
-                                   ('install_scripts', 'install_dir'),
-                                   ('force', 'force'),
-                                   ('skip_build', 'skip_build'),
-                                  )
-
-    def run(self):
-        if not self.skip_build:
-            self.run_command('build_scripts')
-        self.outfiles = self.copy_tree(self.build_dir, self.install_dir)
-        if os.name == 'posix':
-            # Set the executable bits (owner, group, and world) on
-            # all the scripts we just installed.
-            for file in self.get_outputs():
-                if self.dry_run:
-                    log.info("changing mode of %s", file)
-                else:
-                    mode = ((os.stat(file)[ST_MODE]) | 0o555) & 0o7777
-                    log.info("changing mode of %s to %o", file, mode)
-                    os.chmod(file, mode)
-
-    def get_inputs(self):
-        return self.distribution.scripts or []
-
-    def get_outputs(self):
-        return self.outfiles or []
diff --git a/contrib/tools/python3/src/Lib/distutils/command/register.py b/contrib/tools/python3/src/Lib/distutils/command/register.py
deleted file mode 100644
index 0fac94e9e5..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/register.py
+++ /dev/null
@@ -1,304 +0,0 @@
-"""distutils.command.register
-
-Implements the Distutils 'register' command (register with the repository).
-"""
-
-# created 2002/10/21, Richard Jones
-
-import getpass
-import io
-import urllib.parse, urllib.request
-from warnings import warn
-
-from distutils.core import PyPIRCCommand
-from distutils.errors import *
-from distutils import log
-
-class register(PyPIRCCommand):
-
-    description = ("register the distribution with the Python package index")
-    user_options = PyPIRCCommand.user_options + [
-        ('list-classifiers', None,
-         'list the valid Trove classifiers'),
-        ('strict', None ,
-         'Will stop the registering if the meta-data are not fully compliant')
-        ]
-    boolean_options = PyPIRCCommand.boolean_options + [
-        'verify', 'list-classifiers', 'strict']
-
-    sub_commands = [('check', lambda self: True)]
-
-    def initialize_options(self):
-        PyPIRCCommand.initialize_options(self)
-        self.list_classifiers = 0
-        self.strict = 0
-
-    def finalize_options(self):
-        PyPIRCCommand.finalize_options(self)
-        # setting options for the `check` subcommand
-        check_options = {'strict': ('register', self.strict),
-                         'restructuredtext': ('register', 1)}
-        self.distribution.command_options['check'] = check_options
-
-    def run(self):
-        self.finalize_options()
-        self._set_config()
-
-        # Run sub commands
-        for cmd_name in self.get_sub_commands():
-            self.run_command(cmd_name)
-
-        if self.dry_run:
-            self.verify_metadata()
-        elif self.list_classifiers:
-            self.classifiers()
-        else:
-            self.send_metadata()
-
-    def check_metadata(self):
-        """Deprecated API."""
-        warn("distutils.command.register.check_metadata is deprecated, \
-              use the check command instead", PendingDeprecationWarning)
-        check = self.distribution.get_command_obj('check')
-        check.ensure_finalized()
-        check.strict = self.strict
-        check.restructuredtext = 1
-        check.run()
-
-    def _set_config(self):
-        ''' Reads the configuration file and set attributes.
-        '''
-        config = self._read_pypirc()
-        if config != {}:
-            self.username = config['username']
-            self.password = config['password']
-            self.repository = config['repository']
-            self.realm = config['realm']
-            self.has_config = True
-        else:
-            if self.repository not in ('pypi', self.DEFAULT_REPOSITORY):
-                raise ValueError('%s not found in .pypirc' % self.repository)
-            if self.repository == 'pypi':
-                self.repository = self.DEFAULT_REPOSITORY
-            self.has_config = False
-
-    def classifiers(self):
-        ''' Fetch the list of classifiers from the server.
-        '''
-        url = self.repository+'?:action=list_classifiers'
-        response = urllib.request.urlopen(url)
-        log.info(self._read_pypi_response(response))
-
-    def verify_metadata(self):
-        ''' Send the metadata to the package index server to be checked.
-        '''
-        # send the info to the server and report the result
-        (code, result) = self.post_to_server(self.build_post_data('verify'))
-        log.info('Server response (%s): %s', code, result)
-
-    def send_metadata(self):
-        ''' Send the metadata to the package index server.
-
-            Well, do the following:
-            1. figure who the user is, and then
-            2. send the data as a Basic auth'ed POST.
-
-            First we try to read the username/password from $HOME/.pypirc,
-            which is a ConfigParser-formatted file with a section
-            [distutils] containing username and password entries (both
-            in clear text). Eg:
-
-                [distutils]
-                index-servers =
-                    pypi
-
-                [pypi]
-                username: fred
-                password: sekrit
-
-            Otherwise, to figure who the user is, we offer the user three
-            choices:
-
-             1. use existing login,
-             2. register as a new user, or
-             3. set the password to a random string and email the user.
-
-        '''
-        # see if we can short-cut and get the username/password from the
-        # config
-        if self.has_config:
-            choice = '1'
-            username = self.username
-            password = self.password
-        else:
-            choice = 'x'
-            username = password = ''
-
-        # get the user's login info
-        choices = '1 2 3 4'.split()
-        while choice not in choices:
-            self.announce('''\
-We need to know who you are, so please choose either:
- 1. use your existing login,
- 2. register as a new user,
- 3. have the server generate a new password for you (and email it to you), or
- 4. quit
-Your selection [default 1]: ''', log.INFO)
-            choice = input()
-            if not choice:
-                choice = '1'
-            elif choice not in choices:
-                print('Please choose one of the four options!')
-
-        if choice == '1':
-            # get the username and password
-            while not username:
-                username = input('Username: ')
-            while not password:
-                password = getpass.getpass('Password: ')
-
-            # set up the authentication
-            auth = urllib.request.HTTPPasswordMgr()
-            host = urllib.parse.urlparse(self.repository)[1]
-            auth.add_password(self.realm, host, username, password)
-            # send the info to the server and report the result
-            code, result = self.post_to_server(self.build_post_data('submit'),
-                auth)
-            self.announce('Server response (%s): %s' % (code, result),
-                          log.INFO)
-
-            # possibly save the login
-            if code == 200:
-                if self.has_config:
-                    # sharing the password in the distribution instance
-                    # so the upload command can reuse it
-                    self.distribution.password = password
-                else:
-                    self.announce(('I can store your PyPI login so future '
-                                   'submissions will be faster.'), log.INFO)
-                    self.announce('(the login will be stored in %s)' % \
-                                  self._get_rc_file(), log.INFO)
-                    choice = 'X'
-                    while choice.lower() not in 'yn':
-                        choice = input('Save your login (y/N)?')
-                        if not choice:
-                            choice = 'n'
-                    if choice.lower() == 'y':
-                        self._store_pypirc(username, password)
-
-        elif choice == '2':
-            data = {':action': 'user'}
-            data['name'] = data['password'] = data['email'] = ''
-            data['confirm'] = None
-            while not data['name']:
-                data['name'] = input('Username: ')
-            while data['password'] != data['confirm']:
-                while not data['password']:
-                    data['password'] = getpass.getpass('Password: ')
-                while not data['confirm']:
-                    data['confirm'] = getpass.getpass(' Confirm: ')
-                if data['password'] != data['confirm']:
-                    data['password'] = ''
-                    data['confirm'] = None
-                    print("Password and confirm don't match!")
-            while not data['email']:
-                data['email'] = input('   EMail: ')
-            code, result = self.post_to_server(data)
-            if code != 200:
-                log.info('Server response (%s): %s', code, result)
-            else:
-                log.info('You will receive an email shortly.')
-                log.info(('Follow the instructions in it to '
-                          'complete registration.'))
-        elif choice == '3':
-            data = {':action': 'password_reset'}
-            data['email'] = ''
-            while not data['email']:
-                data['email'] = input('Your email address: ')
-            code, result = self.post_to_server(data)
-            log.info('Server response (%s): %s', code, result)
-
-    def build_post_data(self, action):
-        # figure the data to send - the metadata plus some additional
-        # information used by the package server
-        meta = self.distribution.metadata
-        data = {
-            ':action': action,
-            'metadata_version' : '1.0',
-            'name': meta.get_name(),
-            'version': meta.get_version(),
-            'summary': meta.get_description(),
-            'home_page': meta.get_url(),
-            'author': meta.get_contact(),
-            'author_email': meta.get_contact_email(),
-            'license': meta.get_licence(),
-            'description': meta.get_long_description(),
-            'keywords': meta.get_keywords(),
-            'platform': meta.get_platforms(),
-            'classifiers': meta.get_classifiers(),
-            'download_url': meta.get_download_url(),
-            # PEP 314
-            'provides': meta.get_provides(),
-            'requires': meta.get_requires(),
-            'obsoletes': meta.get_obsoletes(),
-        }
-        if data['provides'] or data['requires'] or data['obsoletes']:
-            data['metadata_version'] = '1.1'
-        return data
-
-    def post_to_server(self, data, auth=None):
-        ''' Post a query to the server, and return a string response.
-        '''
-        if 'name' in data:
-            self.announce('Registering %s to %s' % (data['name'],
-                                                    self.repository),
-                                                    log.INFO)
-        # Build up the MIME payload for the urllib2 POST data
-        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
-        sep_boundary = '\n--' + boundary
-        end_boundary = sep_boundary + '--'
-        body = io.StringIO()
-        for key, value in data.items():
-            # handle multiple entries for the same name
-            if type(value) not in (type([]), type( () )):
-                value = [value]
-            for value in value:
-                value = str(value)
-                body.write(sep_boundary)
-                body.write('\nContent-Disposition: form-data; name="%s"'%key)
-                body.write("\n\n")
-                body.write(value)
-                if value and value[-1] == '\r':
-                    body.write('\n')  # write an extra newline (lurve Macs)
-        body.write(end_boundary)
-        body.write("\n")
-        body = body.getvalue().encode("utf-8")
-
-        # build the Request
-        headers = {
-            'Content-type': 'multipart/form-data; boundary=%s; charset=utf-8'%boundary,
-            'Content-length': str(len(body))
-        }
-        req = urllib.request.Request(self.repository, body, headers)
-
-        # handle HTTP and include the Basic Auth handler
-        opener = urllib.request.build_opener(
-            urllib.request.HTTPBasicAuthHandler(password_mgr=auth)
-        )
-        data = ''
-        try:
-            result = opener.open(req)
-        except urllib.error.HTTPError as e:
-            if self.show_response:
-                data = e.fp.read()
-            result = e.code, e.msg
-        except urllib.error.URLError as e:
-            result = 500, str(e)
-        else:
-            if self.show_response:
-                data = self._read_pypi_response(result)
-            result = 200, 'OK'
-        if self.show_response:
-            msg = '\n'.join(('-' * 75, data, '-' * 75))
-            self.announce(msg, log.INFO)
-        return result
diff --git a/contrib/tools/python3/src/Lib/distutils/command/sdist.py b/contrib/tools/python3/src/Lib/distutils/command/sdist.py
deleted file mode 100644
index b4996fcb1d..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/sdist.py
+++ /dev/null
@@ -1,494 +0,0 @@
-"""distutils.command.sdist
-
-Implements the Distutils 'sdist' command (create a source distribution)."""
-
-import os
-import sys
-from glob import glob
-from warnings import warn
-
-from distutils.core import Command
-from distutils import dir_util
-from distutils import file_util
-from distutils import archive_util
-from distutils.text_file import TextFile
-from distutils.filelist import FileList
-from distutils import log
-from distutils.util import convert_path
-from distutils.errors import DistutilsTemplateError, DistutilsOptionError
-
-
-def show_formats():
-    """Print all possible values for the 'formats' option (used by
-    the "--help-formats" command-line option).
-    """
-    from distutils.fancy_getopt import FancyGetopt
-    from distutils.archive_util import ARCHIVE_FORMATS
-    formats = []
-    for format in ARCHIVE_FORMATS.keys():
-        formats.append(("formats=" + format, None,
-                        ARCHIVE_FORMATS[format][2]))
-    formats.sort()
-    FancyGetopt(formats).print_help(
-        "List of available source distribution formats:")
-
-
-class sdist(Command):
-
-    description = "create a source distribution (tarball, zip file, etc.)"
-
-    def checking_metadata(self):
-        """Callable used for the check sub-command.
-
-        Placed here so user_options can view it"""
-        return self.metadata_check
-
-    user_options = [
-        ('template=', 't',
-         "name of manifest template file [default: MANIFEST.in]"),
-        ('manifest=', 'm',
-         "name of manifest file [default: MANIFEST]"),
-        ('use-defaults', None,
-         "include the default file set in the manifest "
-         "[default; disable with --no-defaults]"),
-        ('no-defaults', None,
-         "don't include the default file set"),
-        ('prune', None,
-         "specifically exclude files/directories that should not be "
-         "distributed (build tree, RCS/CVS dirs, etc.) "
-         "[default; disable with --no-prune]"),
-        ('no-prune', None,
-         "don't automatically exclude anything"),
-        ('manifest-only', 'o',
-         "just regenerate the manifest and then stop "
-         "(implies --force-manifest)"),
-        ('force-manifest', 'f',
-         "forcibly regenerate the manifest and carry on as usual. "
-         "Deprecated: now the manifest is always regenerated."),
-        ('formats=', None,
-         "formats for source distribution (comma-separated list)"),
-        ('keep-temp', 'k',
-         "keep the distribution tree around after creating " +
-         "archive file(s)"),
-        ('dist-dir=', 'd',
-         "directory to put the source distribution archive(s) in "
-         "[default: dist]"),
-        ('metadata-check', None,
-         "Ensure that all required elements of meta-data "
-         "are supplied. Warn if any missing. [default]"),
-        ('owner=', 'u',
-         "Owner name used when creating a tar file [default: current user]"),
-        ('group=', 'g',
-         "Group name used when creating a tar file [default: current group]"),
-        ]
-
-    boolean_options = ['use-defaults', 'prune',
-                       'manifest-only', 'force-manifest',
-                       'keep-temp', 'metadata-check']
-
-    help_options = [
-        ('help-formats', None,
-         "list available distribution formats", show_formats),
-        ]
-
-    negative_opt = {'no-defaults': 'use-defaults',
-                    'no-prune': 'prune' }
-
-    sub_commands = [('check', checking_metadata)]
-
-    READMES = ('README', 'README.txt', 'README.rst')
-
-    def initialize_options(self):
-        # 'template' and 'manifest' are, respectively, the names of
-        # the manifest template and manifest file.
-        self.template = None
-        self.manifest = None
-
-        # 'use_defaults': if true, we will include the default file set
-        # in the manifest
-        self.use_defaults = 1
-        self.prune = 1
-
-        self.manifest_only = 0
-        self.force_manifest = 0
-
-        self.formats = ['gztar']
-        self.keep_temp = 0
-        self.dist_dir = None
-
-        self.archive_files = None
-        self.metadata_check = 1
-        self.owner = None
-        self.group = None
-
-    def finalize_options(self):
-        if self.manifest is None:
-            self.manifest = "MANIFEST"
-        if self.template is None:
-            self.template = "MANIFEST.in"
-
-        self.ensure_string_list('formats')
-
-        bad_format = archive_util.check_archive_formats(self.formats)
-        if bad_format:
-            raise DistutilsOptionError(
-                  "unknown archive format '%s'" % bad_format)
-
-        if self.dist_dir is None:
-            self.dist_dir = "dist"
-
-    def run(self):
-        # 'filelist' contains the list of files that will make up the
-        # manifest
-        self.filelist = FileList()
-
-        # Run sub commands
-        for cmd_name in self.get_sub_commands():
-            self.run_command(cmd_name)
-
-        # Do whatever it takes to get the list of files to process
-        # (process the manifest template, read an existing manifest,
-        # whatever).  File list is accumulated in 'self.filelist'.
-        self.get_file_list()
-
-        # If user just wanted us to regenerate the manifest, stop now.
-        if self.manifest_only:
-            return
-
-        # Otherwise, go ahead and create the source distribution tarball,
-        # or zipfile, or whatever.
-        self.make_distribution()
-
-    def check_metadata(self):
-        """Deprecated API."""
-        warn("distutils.command.sdist.check_metadata is deprecated, \
-              use the check command instead", PendingDeprecationWarning)
-        check = self.distribution.get_command_obj('check')
-        check.ensure_finalized()
-        check.run()
-
-    def get_file_list(self):
-        """Figure out the list of files to include in the source
-        distribution, and put it in 'self.filelist'.  This might involve
-        reading the manifest template (and writing the manifest), or just
-        reading the manifest, or just using the default file set -- it all
-        depends on the user's options.
-        """
-        # new behavior when using a template:
-        # the file list is recalculated every time because
-        # even if MANIFEST.in or setup.py are not changed
-        # the user might have added some files in the tree that
-        # need to be included.
-        #
-        #  This makes --force the default and only behavior with templates.
-        template_exists = os.path.isfile(self.template)
-        if not template_exists and self._manifest_is_not_generated():
-            self.read_manifest()
-            self.filelist.sort()
-            self.filelist.remove_duplicates()
-            return
-
-        if not template_exists:
-            self.warn(("manifest template '%s' does not exist " +
-                        "(using default file list)") %
-                        self.template)
-        self.filelist.findall()
-
-        if self.use_defaults:
-            self.add_defaults()
-
-        if template_exists:
-            self.read_template()
-
-        if self.prune:
-            self.prune_file_list()
-
-        self.filelist.sort()
-        self.filelist.remove_duplicates()
-        self.write_manifest()
-
-    def add_defaults(self):
-        """Add all the default files to self.filelist:
-          - README or README.txt
-          - setup.py
-          - test/test*.py
-          - all pure Python modules mentioned in setup script
-          - all files pointed by package_data (build_py)
-          - all files defined in data_files.
-          - all files defined as scripts.
-          - all C sources listed as part of extensions or C libraries
-            in the setup script (doesn't catch C headers!)
-        Warns if (README or README.txt) or setup.py are missing; everything
-        else is optional.
-        """
-        self._add_defaults_standards()
-        self._add_defaults_optional()
-        self._add_defaults_python()
-        self._add_defaults_data_files()
-        self._add_defaults_ext()
-        self._add_defaults_c_libs()
-        self._add_defaults_scripts()
-
-    @staticmethod
-    def _cs_path_exists(fspath):
-        """
-        Case-sensitive path existence check
-
-        >>> sdist._cs_path_exists(__file__)
-        True
-        >>> sdist._cs_path_exists(__file__.upper())
-        False
-        """
-        if not os.path.exists(fspath):
-            return False
-        # make absolute so we always have a directory
-        abspath = os.path.abspath(fspath)
-        directory, filename = os.path.split(abspath)
-        return filename in os.listdir(directory)
-
-    def _add_defaults_standards(self):
-        standards = [self.READMES, self.distribution.script_name]
-        for fn in standards:
-            if isinstance(fn, tuple):
-                alts = fn
-                got_it = False
-                for fn in alts:
-                    if self._cs_path_exists(fn):
-                        got_it = True
-                        self.filelist.append(fn)
-                        break
-
-                if not got_it:
-                    self.warn("standard file not found: should have one of " +
-                              ', '.join(alts))
-            else:
-                if self._cs_path_exists(fn):
-                    self.filelist.append(fn)
-                else:
-                    self.warn("standard file '%s' not found" % fn)
-
-    def _add_defaults_optional(self):
-        optional = ['test/test*.py', 'setup.cfg']
-        for pattern in optional:
-            files = filter(os.path.isfile, glob(pattern))
-            self.filelist.extend(files)
-
-    def _add_defaults_python(self):
-        # build_py is used to get:
-        #  - python modules
-        #  - files defined in package_data
-        build_py = self.get_finalized_command('build_py')
-
-        # getting python files
-        if self.distribution.has_pure_modules():
-            self.filelist.extend(build_py.get_source_files())
-
-        # getting package_data files
-        # (computed in build_py.data_files by build_py.finalize_options)
-        for pkg, src_dir, build_dir, filenames in build_py.data_files:
-            for filename in filenames:
-                self.filelist.append(os.path.join(src_dir, filename))
-
-    def _add_defaults_data_files(self):
-        # getting distribution.data_files
-        if self.distribution.has_data_files():
-            for item in self.distribution.data_files:
-                if isinstance(item, str):
-                    # plain file
-                    item = convert_path(item)
-                    if os.path.isfile(item):
-                        self.filelist.append(item)
-                else:
-                    # a (dirname, filenames) tuple
-                    dirname, filenames = item
-                    for f in filenames:
-                        f = convert_path(f)
-                        if os.path.isfile(f):
-                            self.filelist.append(f)
-
-    def _add_defaults_ext(self):
-        if self.distribution.has_ext_modules():
-            build_ext = self.get_finalized_command('build_ext')
-            self.filelist.extend(build_ext.get_source_files())
-
-    def _add_defaults_c_libs(self):
-        if self.distribution.has_c_libraries():
-            build_clib = self.get_finalized_command('build_clib')
-            self.filelist.extend(build_clib.get_source_files())
-
-    def _add_defaults_scripts(self):
-        if self.distribution.has_scripts():
-            build_scripts = self.get_finalized_command('build_scripts')
-            self.filelist.extend(build_scripts.get_source_files())
-
-    def read_template(self):
-        """Read and parse manifest template file named by self.template.
-
-        (usually "MANIFEST.in") The parsing and processing is done by
-        'self.filelist', which updates itself accordingly.
-        """
-        log.info("reading manifest template '%s'", self.template)
-        template = TextFile(self.template, strip_comments=1, skip_blanks=1,
-                            join_lines=1, lstrip_ws=1, rstrip_ws=1,
-                            collapse_join=1)
-
-        try:
-            while True:
-                line = template.readline()
-                if line is None:            # end of file
-                    break
-
-                try:
-                    self.filelist.process_template_line(line)
-                # the call above can raise a DistutilsTemplateError for
-                # malformed lines, or a ValueError from the lower-level
-                # convert_path function
-                except (DistutilsTemplateError, ValueError) as msg:
-                    self.warn("%s, line %d: %s" % (template.filename,
-                                                   template.current_line,
-                                                   msg))
-        finally:
-            template.close()
-
-    def prune_file_list(self):
-        """Prune off branches that might slip into the file list as created
-        by 'read_template()', but really don't belong there:
-          * the build tree (typically "build")
-          * the release tree itself (only an issue if we ran "sdist"
-            previously with --keep-temp, or it aborted)
-          * any RCS, CVS, .svn, .hg, .git, .bzr, _darcs directories
-        """
-        build = self.get_finalized_command('build')
-        base_dir = self.distribution.get_fullname()
-
-        self.filelist.exclude_pattern(None, prefix=build.build_base)
-        self.filelist.exclude_pattern(None, prefix=base_dir)
-
-        if sys.platform == 'win32':
-            seps = r'/|\\'
-        else:
-            seps = '/'
-
-        vcs_dirs = ['RCS', 'CVS', r'\.svn', r'\.hg', r'\.git', r'\.bzr',
-                    '_darcs']
-        vcs_ptrn = r'(^|%s)(%s)(%s).*' % (seps, '|'.join(vcs_dirs), seps)
-        self.filelist.exclude_pattern(vcs_ptrn, is_regex=1)
-
-    def write_manifest(self):
-        """Write the file list in 'self.filelist' (presumably as filled in
-        by 'add_defaults()' and 'read_template()') to the manifest file
-        named by 'self.manifest'.
-        """
-        if self._manifest_is_not_generated():
-            log.info("not writing to manually maintained "
-                     "manifest file '%s'" % self.manifest)
-            return
-
-        content = self.filelist.files[:]
-        content.insert(0, '# file GENERATED by distutils, do NOT edit')
-        self.execute(file_util.write_file, (self.manifest, content),
-                     "writing manifest file '%s'" % self.manifest)
-
-    def _manifest_is_not_generated(self):
-        # check for special comment used in 3.1.3 and higher
-        if not os.path.isfile(self.manifest):
-            return False
-
-        fp = open(self.manifest)
-        try:
-            first_line = fp.readline()
-        finally:
-            fp.close()
-        return first_line != '# file GENERATED by distutils, do NOT edit\n'
-
-    def read_manifest(self):
-        """Read the manifest file (named by 'self.manifest') and use it to
-        fill in 'self.filelist', the list of files to include in the source
-        distribution.
-        """
-        log.info("reading manifest file '%s'", self.manifest)
-        with open(self.manifest) as manifest:
-            for line in manifest:
-                # ignore comments and blank lines
-                line = line.strip()
-                if line.startswith('#') or not line:
-                    continue
-                self.filelist.append(line)
-
-    def make_release_tree(self, base_dir, files):
-        """Create the directory tree that will become the source
-        distribution archive.  All directories implied by the filenames in
-        'files' are created under 'base_dir', and then we hard link or copy
-        (if hard linking is unavailable) those files into place.
-        Essentially, this duplicates the developer's source tree, but in a
-        directory named after the distribution, containing only the files
-        to be distributed.
-        """
-        # Create all the directories under 'base_dir' necessary to
-        # put 'files' there; the 'mkpath()' is just so we don't die
-        # if the manifest happens to be empty.
-        self.mkpath(base_dir)
-        dir_util.create_tree(base_dir, files, dry_run=self.dry_run)
-
-        # And walk over the list of files, either making a hard link (if
-        # os.link exists) to each one that doesn't already exist in its
-        # corresponding location under 'base_dir', or copying each file
-        # that's out-of-date in 'base_dir'.  (Usually, all files will be
-        # out-of-date, because by default we blow away 'base_dir' when
-        # we're done making the distribution archives.)
-
-        if hasattr(os, 'link'):        # can make hard links on this system
-            link = 'hard'
-            msg = "making hard links in %s..." % base_dir
-        else:                           # nope, have to copy
-            link = None
-            msg = "copying files to %s..." % base_dir
-
-        if not files:
-            log.warn("no files to distribute -- empty manifest?")
-        else:
-            log.info(msg)
-        for file in files:
-            if not os.path.isfile(file):
-                log.warn("'%s' not a regular file -- skipping", file)
-            else:
-                dest = os.path.join(base_dir, file)
-                self.copy_file(file, dest, link=link)
-
-        self.distribution.metadata.write_pkg_info(base_dir)
-
-    def make_distribution(self):
-        """Create the source distribution(s).  First, we create the release
-        tree with 'make_release_tree()'; then, we create all required
-        archive files (according to 'self.formats') from the release tree.
-        Finally, we clean up by blowing away the release tree (unless
-        'self.keep_temp' is true).  The list of archive files created is
-        stored so it can be retrieved later by 'get_archive_files()'.
-        """
-        # Don't warn about missing meta-data here -- should be (and is!)
-        # done elsewhere.
-        base_dir = self.distribution.get_fullname()
-        base_name = os.path.join(self.dist_dir, base_dir)
-
-        self.make_release_tree(base_dir, self.filelist.files)
-        archive_files = []              # remember names of files we create
-        # tar archive must be created last to avoid overwrite and remove
-        if 'tar' in self.formats:
-            self.formats.append(self.formats.pop(self.formats.index('tar')))
-
-        for fmt in self.formats:
-            file = self.make_archive(base_name, fmt, base_dir=base_dir,
-                                     owner=self.owner, group=self.group)
-            archive_files.append(file)
-            self.distribution.dist_files.append(('sdist', '', file))
-
-        self.archive_files = archive_files
-
-        if not self.keep_temp:
-            dir_util.remove_tree(base_dir, dry_run=self.dry_run)
-
-    def get_archive_files(self):
-        """Return the list of archive files created when the command
-        was run, or None if the command hasn't run yet.
-        """
-        return self.archive_files
diff --git a/contrib/tools/python3/src/Lib/distutils/command/upload.py b/contrib/tools/python3/src/Lib/distutils/command/upload.py
deleted file mode 100644
index e0ecb655b9..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/command/upload.py
+++ /dev/null
@@ -1,215 +0,0 @@
-"""
-distutils.command.upload
-
-Implements the Distutils 'upload' subcommand (upload package to a package
-index).
-"""
-
-import os
-import io
-import hashlib
-from base64 import standard_b64encode
-from urllib.error import HTTPError
-from urllib.request import urlopen, Request
-from urllib.parse import urlparse
-from distutils.errors import DistutilsError, DistutilsOptionError
-from distutils.core import PyPIRCCommand
-from distutils.spawn import spawn
-from distutils import log
-
-
-# PyPI Warehouse supports MD5, SHA256, and Blake2 (blake2-256)
-# https://bugs.python.org/issue40698
-_FILE_CONTENT_DIGESTS = {
-    "md5_digest": getattr(hashlib, "md5", None),
-    "sha256_digest": getattr(hashlib, "sha256", None),
-    "blake2_256_digest": getattr(hashlib, "blake2b", None),
-}
-
-
-class upload(PyPIRCCommand):
-
-    description = "upload binary package to PyPI"
-
-    user_options = PyPIRCCommand.user_options + [
-        ('sign', 's',
-         'sign files to upload using gpg'),
-        ('identity=', 'i', 'GPG identity used to sign files'),
-        ]
-
-    boolean_options = PyPIRCCommand.boolean_options + ['sign']
-
-    def initialize_options(self):
-        PyPIRCCommand.initialize_options(self)
-        self.username = ''
-        self.password = ''
-        self.show_response = 0
-        self.sign = False
-        self.identity = None
-
-    def finalize_options(self):
-        PyPIRCCommand.finalize_options(self)
-        if self.identity and not self.sign:
-            raise DistutilsOptionError(
-                "Must use --sign for --identity to have meaning"
-            )
-        config = self._read_pypirc()
-        if config != {}:
-            self.username = config['username']
-            self.password = config['password']
-            self.repository = config['repository']
-            self.realm = config['realm']
-
-        # getting the password from the distribution
-        # if previously set by the register command
-        if not self.password and self.distribution.password:
-            self.password = self.distribution.password
-
-    def run(self):
-        if not self.distribution.dist_files:
-            msg = ("Must create and upload files in one command "
-                   "(e.g. setup.py sdist upload)")
-            raise DistutilsOptionError(msg)
-        for command, pyversion, filename in self.distribution.dist_files:
-            self.upload_file(command, pyversion, filename)
-
-    def upload_file(self, command, pyversion, filename):
-        # Makes sure the repository URL is compliant
-        schema, netloc, url, params, query, fragments = \
-            urlparse(self.repository)
-        if params or query or fragments:
-            raise AssertionError("Incompatible url %s" % self.repository)
-
-        if schema not in ('http', 'https'):
-            raise AssertionError("unsupported schema " + schema)
-
-        # Sign if requested
-        if self.sign:
-            gpg_args = ["gpg", "--detach-sign", "-a", filename]
-            if self.identity:
-                gpg_args[2:2] = ["--local-user", self.identity]
-            spawn(gpg_args,
-                  dry_run=self.dry_run)
-
-        # Fill in the data - send all the meta-data in case we need to
-        # register a new release
-        f = open(filename,'rb')
-        try:
-            content = f.read()
-        finally:
-            f.close()
-
-        meta = self.distribution.metadata
-        data = {
-            # action
-            ':action': 'file_upload',
-            'protocol_version': '1',
-
-            # identify release
-            'name': meta.get_name(),
-            'version': meta.get_version(),
-
-            # file content
-            'content': (os.path.basename(filename),content),
-            'filetype': command,
-            'pyversion': pyversion,
-
-            # additional meta-data
-            'metadata_version': '1.0',
-            'summary': meta.get_description(),
-            'home_page': meta.get_url(),
-            'author': meta.get_contact(),
-            'author_email': meta.get_contact_email(),
-            'license': meta.get_licence(),
-            'description': meta.get_long_description(),
-            'keywords': meta.get_keywords(),
-            'platform': meta.get_platforms(),
-            'classifiers': meta.get_classifiers(),
-            'download_url': meta.get_download_url(),
-            # PEP 314
-            'provides': meta.get_provides(),
-            'requires': meta.get_requires(),
-            'obsoletes': meta.get_obsoletes(),
-            }
-
-        data['comment'] = ''
-
-        # file content digests
-        for digest_name, digest_cons in _FILE_CONTENT_DIGESTS.items():
-            if digest_cons is None:
-                continue
-            try:
-                data[digest_name] = digest_cons(content).hexdigest()
-            except ValueError:
-                # hash digest not available or blocked by security policy
-                pass
-
-        if self.sign:
-            with open(filename + ".asc", "rb") as f:
-                data['gpg_signature'] = (os.path.basename(filename) + ".asc",
-                                         f.read())
-
-        # set up the authentication
-        user_pass = (self.username + ":" + self.password).encode('ascii')
-        # The exact encoding of the authentication string is debated.
-        # Anyway PyPI only accepts ascii for both username or password.
-        auth = "Basic " + standard_b64encode(user_pass).decode('ascii')
-
-        # Build up the MIME payload for the POST data
-        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
-        sep_boundary = b'\r\n--' + boundary.encode('ascii')
-        end_boundary = sep_boundary + b'--\r\n'
-        body = io.BytesIO()
-        for key, value in data.items():
-            title = '\r\nContent-Disposition: form-data; name="%s"' % key
-            # handle multiple entries for the same name
-            if not isinstance(value, list):
-                value = [value]
-            for value in value:
-                if type(value) is tuple:
-                    title += '; filename="%s"' % value[0]
-                    value = value[1]
-                else:
-                    value = str(value).encode('utf-8')
-                body.write(sep_boundary)
-                body.write(title.encode('utf-8'))
-                body.write(b"\r\n\r\n")
-                body.write(value)
-        body.write(end_boundary)
-        body = body.getvalue()
-
-        msg = "Submitting %s to %s" % (filename, self.repository)
-        self.announce(msg, log.INFO)
-
-        # build the Request
-        headers = {
-            'Content-type': 'multipart/form-data; boundary=%s' % boundary,
-            'Content-length': str(len(body)),
-            'Authorization': auth,
-        }
-
-        request = Request(self.repository, data=body,
-                          headers=headers)
-        # send the data
-        try:
-            result = urlopen(request)
-            status = result.getcode()
-            reason = result.msg
-        except HTTPError as e:
-            status = e.code
-            reason = e.msg
-        except OSError as e:
-            self.announce(str(e), log.ERROR)
-            raise
-
-        if status == 200:
-            self.announce('Server response (%s): %s' % (status, reason),
-                          log.INFO)
-            if self.show_response:
-                text = self._read_pypi_response(result)
-                msg = '\n'.join(('-' * 75, text, '-' * 75))
-                self.announce(msg, log.INFO)
-        else:
-            msg = 'Upload failed (%s): %s' % (status, reason)
-            self.announce(msg, log.ERROR)
-            raise DistutilsError(msg)
diff --git a/contrib/tools/python3/src/Lib/distutils/config.py b/contrib/tools/python3/src/Lib/distutils/config.py
deleted file mode 100644
index a201c86a17..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/config.py
+++ /dev/null
@@ -1,133 +0,0 @@
-"""distutils.pypirc
-
-Provides the PyPIRCCommand class, the base class for the command classes
-that uses .pypirc in the distutils.command package.
-"""
-import os
-from configparser import RawConfigParser
-import warnings
-
-from distutils.cmd import Command
-
-DEFAULT_PYPIRC = """\
-[distutils]
-index-servers =
-    pypi
-
-[pypi]
-username:%s
-password:%s
-"""
-
-class PyPIRCCommand(Command):
-    """Base command that knows how to handle the .pypirc file
-    """
-    DEFAULT_REPOSITORY = 'https://upload.pypi.org/legacy/'
-    DEFAULT_REALM = 'pypi'
-    repository = None
-    realm = None
-
-    user_options = [
-        ('repository=', 'r',
-         "url of repository [default: %s]" % \
-            DEFAULT_REPOSITORY),
-        ('show-response', None,
-         'display full response text from server')]
-
-    boolean_options = ['show-response']
-
-    def _get_rc_file(self):
-        """Returns rc file path."""
-        return os.path.join(os.path.expanduser('~'), '.pypirc')
-
-    def _store_pypirc(self, username, password):
-        """Creates a default .pypirc file."""
-        rc = self._get_rc_file()
-        with os.fdopen(os.open(rc, os.O_CREAT | os.O_WRONLY, 0o600), 'w') as f:
-            f.write(DEFAULT_PYPIRC % (username, password))
-
-    def _read_pypirc(self):
-        """Reads the .pypirc file."""
-        rc = self._get_rc_file()
-        if os.path.exists(rc):
-            self.announce('Using PyPI login from %s' % rc)
-            repository = self.repository or self.DEFAULT_REPOSITORY
-
-            config = RawConfigParser()
-            config.read(rc)
-            sections = config.sections()
-            if 'distutils' in sections:
-                # let's get the list of servers
-                index_servers = config.get('distutils', 'index-servers')
-                _servers = [server.strip() for server in
-                            index_servers.split('\n')
-                            if server.strip() != '']
-                if _servers == []:
-                    # nothing set, let's try to get the default pypi
-                    if 'pypi' in sections:
-                        _servers = ['pypi']
-                    else:
-                        # the file is not properly defined, returning
-                        # an empty dict
-                        return {}
-                for server in _servers:
-                    current = {'server': server}
-                    current['username'] = config.get(server, 'username')
-
-                    # optional params
-                    for key, default in (('repository',
-                                          self.DEFAULT_REPOSITORY),
-                                         ('realm', self.DEFAULT_REALM),
-                                         ('password', None)):
-                        if config.has_option(server, key):
-                            current[key] = config.get(server, key)
-                        else:
-                            current[key] = default
-
-                    # work around people having "repository" for the "pypi"
-                    # section of their config set to the HTTP (rather than
-                    # HTTPS) URL
-                    if (server == 'pypi' and
-                        repository in (self.DEFAULT_REPOSITORY, 'pypi')):
-                        current['repository'] = self.DEFAULT_REPOSITORY
-                        return current
-
-                    if (current['server'] == repository or
-                        current['repository'] == repository):
-                        return current
-            elif 'server-login' in sections:
-                # old format
-                server = 'server-login'
-                if config.has_option(server, 'repository'):
-                    repository = config.get(server, 'repository')
-                else:
-                    repository = self.DEFAULT_REPOSITORY
-                return {'username': config.get(server, 'username'),
-                        'password': config.get(server, 'password'),
-                        'repository': repository,
-                        'server': server,
-                        'realm': self.DEFAULT_REALM}
-
-        return {}
-
-    def _read_pypi_response(self, response):
-        """Read and decode a PyPI HTTP response."""
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", DeprecationWarning)
-            import cgi
-        content_type = response.getheader('content-type', 'text/plain')
-        encoding = cgi.parse_header(content_type)[1].get('charset', 'ascii')
-        return response.read().decode(encoding)
-
-    def initialize_options(self):
-        """Initialize options."""
-        self.repository = None
-        self.realm = None
-        self.show_response = 0
-
-    def finalize_options(self):
-        """Finalizes options."""
-        if self.repository is None:
-            self.repository = self.DEFAULT_REPOSITORY
-        if self.realm is None:
-            self.realm = self.DEFAULT_REALM
diff --git a/contrib/tools/python3/src/Lib/distutils/core.py b/contrib/tools/python3/src/Lib/distutils/core.py
deleted file mode 100644
index d603d4a45a..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/core.py
+++ /dev/null
@@ -1,234 +0,0 @@
-"""distutils.core
-
-The only module that needs to be imported to use the Distutils; provides
-the 'setup' function (which is to be called from the setup script).  Also
-indirectly provides the Distribution and Command classes, although they are
-really defined in distutils.dist and distutils.cmd.
-"""
-
-import os
-import sys
-
-from distutils.debug import DEBUG
-from distutils.errors import *
-
-# Mainly import these so setup scripts can "from distutils.core import" them.
-from distutils.dist import Distribution
-from distutils.cmd import Command
-from distutils.config import PyPIRCCommand
-from distutils.extension import Extension
-
-# This is a barebones help message generated displayed when the user
-# runs the setup script with no arguments at all.  More useful help
-# is generated with various --help options: global help, list commands,
-# and per-command help.
-USAGE = """\
-usage: %(script)s [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
-   or: %(script)s --help [cmd1 cmd2 ...]
-   or: %(script)s --help-commands
-   or: %(script)s cmd --help
-"""
-
-def gen_usage (script_name):
-    script = os.path.basename(script_name)
-    return USAGE % vars()
-
-
-# Some mild magic to control the behaviour of 'setup()' from 'run_setup()'.
-_setup_stop_after = None
-_setup_distribution = None
-
-# Legal keyword arguments for the setup() function
-setup_keywords = ('distclass', 'script_name', 'script_args', 'options',
-                  'name', 'version', 'author', 'author_email',
-                  'maintainer', 'maintainer_email', 'url', 'license',
-                  'description', 'long_description', 'keywords',
-                  'platforms', 'classifiers', 'download_url',
-                  'requires', 'provides', 'obsoletes',
-                  )
-
-# Legal keyword arguments for the Extension constructor
-extension_keywords = ('name', 'sources', 'include_dirs',
-                      'define_macros', 'undef_macros',
-                      'library_dirs', 'libraries', 'runtime_library_dirs',
-                      'extra_objects', 'extra_compile_args', 'extra_link_args',
-                      'swig_opts', 'export_symbols', 'depends', 'language')
-
-def setup (**attrs):
-    """The gateway to the Distutils: do everything your setup script needs
-    to do, in a highly flexible and user-driven way.  Briefly: create a
-    Distribution instance; find and parse config files; parse the command
-    line; run each Distutils command found there, customized by the options
-    supplied to 'setup()' (as keyword arguments), in config files, and on
-    the command line.
-
-    The Distribution instance might be an instance of a class supplied via
-    the 'distclass' keyword argument to 'setup'; if no such class is
-    supplied, then the Distribution class (in dist.py) is instantiated.
-    All other arguments to 'setup' (except for 'cmdclass') are used to set
-    attributes of the Distribution instance.
-
-    The 'cmdclass' argument, if supplied, is a dictionary mapping command
-    names to command classes.  Each command encountered on the command line
-    will be turned into a command class, which is in turn instantiated; any
-    class found in 'cmdclass' is used in place of the default, which is
-    (for command 'foo_bar') class 'foo_bar' in module
-    'distutils.command.foo_bar'.  The command class must provide a
-    'user_options' attribute which is a list of option specifiers for
-    'distutils.fancy_getopt'.  Any command-line options between the current
-    and the next command are used to set attributes of the current command
-    object.
-
-    When the entire command-line has been successfully parsed, calls the
-    'run()' method on each command object in turn.  This method will be
-    driven entirely by the Distribution object (which each command object
-    has a reference to, thanks to its constructor), and the
-    command-specific options that became attributes of each command
-    object.
-    """
-
-    global _setup_stop_after, _setup_distribution
-
-    # Determine the distribution class -- either caller-supplied or
-    # our Distribution (see below).
-    klass = attrs.get('distclass')
-    if klass:
-        del attrs['distclass']
-    else:
-        klass = Distribution
-
-    if 'script_name' not in attrs:
-        attrs['script_name'] = os.path.basename(sys.argv[0])
-    if 'script_args'  not in attrs:
-        attrs['script_args'] = sys.argv[1:]
-
-    # Create the Distribution instance, using the remaining arguments
-    # (ie. everything except distclass) to initialize it
-    try:
-        _setup_distribution = dist = klass(attrs)
-    except DistutilsSetupError as msg:
-        if 'name' not in attrs:
-            raise SystemExit("error in setup command: %s" % msg)
-        else:
-            raise SystemExit("error in %s setup command: %s" % \
-                  (attrs['name'], msg))
-
-    if _setup_stop_after == "init":
-        return dist
-
-    # Find and parse the config file(s): they will override options from
-    # the setup script, but be overridden by the command line.
-    dist.parse_config_files()
-
-    if DEBUG:
-        print("options (after parsing config files):")
-        dist.dump_option_dicts()
-
-    if _setup_stop_after == "config":
-        return dist
-
-    # Parse the command line and override config files; any
-    # command-line errors are the end user's fault, so turn them into
-    # SystemExit to suppress tracebacks.
-    try:
-        ok = dist.parse_command_line()
-    except DistutilsArgError as msg:
-        raise SystemExit(gen_usage(dist.script_name) + "\nerror: %s" % msg)
-
-    if DEBUG:
-        print("options (after parsing command line):")
-        dist.dump_option_dicts()
-
-    if _setup_stop_after == "commandline":
-        return dist
-
-    # And finally, run all the commands found on the command line.
-    if ok:
-        try:
-            dist.run_commands()
-        except KeyboardInterrupt:
-            raise SystemExit("interrupted")
-        except OSError as exc:
-            if DEBUG:
-                sys.stderr.write("error: %s\n" % (exc,))
-                raise
-            else:
-                raise SystemExit("error: %s" % (exc,))
-
-        except (DistutilsError,
-                CCompilerError) as msg:
-            if DEBUG:
-                raise
-            else:
-                raise SystemExit("error: " + str(msg))
-
-    return dist
-
-# setup ()
-
-
-def run_setup (script_name, script_args=None, stop_after="run"):
-    """Run a setup script in a somewhat controlled environment, and
-    return the Distribution instance that drives things.  This is useful
-    if you need to find out the distribution meta-data (passed as
-    keyword args from 'script' to 'setup()', or the contents of the
-    config files or command-line.
-
-    'script_name' is a file that will be read and run with 'exec()';
-    'sys.argv[0]' will be replaced with 'script' for the duration of the
-    call.  'script_args' is a list of strings; if supplied,
-    'sys.argv[1:]' will be replaced by 'script_args' for the duration of
-    the call.
-
-    'stop_after' tells 'setup()' when to stop processing; possible
-    values:
-      init
-        stop after the Distribution instance has been created and
-        populated with the keyword arguments to 'setup()'
-      config
-        stop after config files have been parsed (and their data
-        stored in the Distribution instance)
-      commandline
-        stop after the command-line ('sys.argv[1:]' or 'script_args')
-        have been parsed (and the data stored in the Distribution)
-      run [default]
-        stop after all commands have been run (the same as if 'setup()'
-        had been called in the usual way
-
-    Returns the Distribution instance, which provides all information
-    used to drive the Distutils.
-    """
-    if stop_after not in ('init', 'config', 'commandline', 'run'):
-        raise ValueError("invalid value for 'stop_after': %r" % (stop_after,))
-
-    global _setup_stop_after, _setup_distribution
-    _setup_stop_after = stop_after
-
-    save_argv = sys.argv.copy()
-    g = {'__file__': script_name}
-    try:
-        try:
-            sys.argv[0] = script_name
-            if script_args is not None:
-                sys.argv[1:] = script_args
-            with open(script_name, 'rb') as f:
-                exec(f.read(), g)
-        finally:
-            sys.argv = save_argv
-            _setup_stop_after = None
-    except SystemExit:
-        # Hmm, should we do something if exiting with a non-zero code
-        # (ie. error)?
-        pass
-
-    if _setup_distribution is None:
-        raise RuntimeError(("'distutils.core.setup()' was never called -- "
-               "perhaps '%s' is not a Distutils setup script?") % \
-              script_name)
-
-    # I wonder if the setup script's namespace -- g and l -- would be of
-    # any interest to callers?
-    #print "_setup_distribution:", _setup_distribution
-    return _setup_distribution
-
-# run_setup ()
diff --git a/contrib/tools/python3/src/Lib/distutils/cygwinccompiler.py b/contrib/tools/python3/src/Lib/distutils/cygwinccompiler.py
deleted file mode 100644
index 66c12dd358..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/cygwinccompiler.py
+++ /dev/null
@@ -1,403 +0,0 @@
-"""distutils.cygwinccompiler
-
-Provides the CygwinCCompiler class, a subclass of UnixCCompiler that
-handles the Cygwin port of the GNU C compiler to Windows.  It also contains
-the Mingw32CCompiler class which handles the mingw32 port of GCC (same as
-cygwin in no-cygwin mode).
-"""
-
-# problems:
-#
-# * if you use a msvc compiled python version (1.5.2)
-#   1. you have to insert a __GNUC__ section in its config.h
-#   2. you have to generate an import library for its dll
-#      - create a def-file for python??.dll
-#      - create an import library using
-#             dlltool --dllname python15.dll --def python15.def \
-#                       --output-lib libpython15.a
-#
-#   see also http://starship.python.net/crew/kernr/mingw32/Notes.html
-#
-# * We put export_symbols in a def-file, and don't use
-#   --export-all-symbols because it doesn't worked reliable in some
-#   tested configurations. And because other windows compilers also
-#   need their symbols specified this no serious problem.
-#
-# tested configurations:
-#
-# * cygwin gcc 2.91.57/ld 2.9.4/dllwrap 0.2.4 works
-#   (after patching python's config.h and for C++ some other include files)
-#   see also http://starship.python.net/crew/kernr/mingw32/Notes.html
-# * mingw32 gcc 2.95.2/ld 2.9.4/dllwrap 0.2.4 works
-#   (ld doesn't support -shared, so we use dllwrap)
-# * cygwin gcc 2.95.2/ld 2.10.90/dllwrap 2.10.90 works now
-#   - its dllwrap doesn't work, there is a bug in binutils 2.10.90
-#     see also http://sources.redhat.com/ml/cygwin/2000-06/msg01274.html
-#   - using gcc -mdll instead dllwrap doesn't work without -static because
-#     it tries to link against dlls instead their import libraries. (If
-#     it finds the dll first.)
-#     By specifying -static we force ld to link against the import libraries,
-#     this is windows standard and there are normally not the necessary symbols
-#     in the dlls.
-#   *** only the version of June 2000 shows these problems
-# * cygwin gcc 3.2/ld 2.13.90 works
-#   (ld supports -shared)
-# * mingw gcc 3.2/ld 2.13 works
-#   (ld supports -shared)
-
-import os
-import sys
-import copy
-from subprocess import Popen, PIPE, check_output
-import re
-
-from distutils.unixccompiler import UnixCCompiler
-from distutils.file_util import write_file
-from distutils.errors import (DistutilsExecError, CCompilerError,
-        CompileError, UnknownFileError)
-from distutils.version import LooseVersion
-from distutils.spawn import find_executable
-
-def get_msvcr():
-    """Include the appropriate MSVC runtime library if Python was built
-    with MSVC 7.0 or later.
-    """
-    msc_pos = sys.version.find('MSC v.')
-    if msc_pos != -1:
-        msc_ver = sys.version[msc_pos+6:msc_pos+10]
-        if msc_ver == '1300':
-            # MSVC 7.0
-            return ['msvcr70']
-        elif msc_ver == '1310':
-            # MSVC 7.1
-            return ['msvcr71']
-        elif msc_ver == '1400':
-            # VS2005 / MSVC 8.0
-            return ['msvcr80']
-        elif msc_ver == '1500':
-            # VS2008 / MSVC 9.0
-            return ['msvcr90']
-        elif msc_ver == '1600':
-            # VS2010 / MSVC 10.0
-            return ['msvcr100']
-        else:
-            raise ValueError("Unknown MS Compiler version %s " % msc_ver)
-
-
-class CygwinCCompiler(UnixCCompiler):
-    """ Handles the Cygwin port of the GNU C compiler to Windows.
-    """
-    compiler_type = 'cygwin'
-    obj_extension = ".o"
-    static_lib_extension = ".a"
-    shared_lib_extension = ".dll"
-    static_lib_format = "lib%s%s"
-    shared_lib_format = "%s%s"
-    exe_extension = ".exe"
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-
-        UnixCCompiler.__init__(self, verbose, dry_run, force)
-
-        status, details = check_config_h()
-        self.debug_print("Python's GCC status: %s (details: %s)" %
-                         (status, details))
-        if status is not CONFIG_H_OK:
-            self.warn(
-                "Python's pyconfig.h doesn't seem to support your compiler. "
-                "Reason: %s. "
-                "Compiling may fail because of undefined preprocessor macros."
-                % details)
-
-        self.gcc_version, self.ld_version, self.dllwrap_version = \
-            get_versions()
-        self.debug_print(self.compiler_type + ": gcc %s, ld %s, dllwrap %s\n" %
-                         (self.gcc_version,
-                          self.ld_version,
-                          self.dllwrap_version) )
-
-        # ld_version >= "2.10.90" and < "2.13" should also be able to use
-        # gcc -mdll instead of dllwrap
-        # Older dllwraps had own version numbers, newer ones use the
-        # same as the rest of binutils ( also ld )
-        # dllwrap 2.10.90 is buggy
-        if self.ld_version >= "2.10.90":
-            self.linker_dll = "gcc"
-        else:
-            self.linker_dll = "dllwrap"
-
-        # ld_version >= "2.13" support -shared so use it instead of
-        # -mdll -static
-        if self.ld_version >= "2.13":
-            shared_option = "-shared"
-        else:
-            shared_option = "-mdll -static"
-
-        # Hard-code GCC because that's what this is all about.
-        # XXX optimization, warnings etc. should be customizable.
-        self.set_executables(compiler='gcc -mcygwin -O -Wall',
-                             compiler_so='gcc -mcygwin -mdll -O -Wall',
-                             compiler_cxx='g++ -mcygwin -O -Wall',
-                             linker_exe='gcc -mcygwin',
-                             linker_so=('%s -mcygwin %s' %
-                                        (self.linker_dll, shared_option)))
-
-        # cygwin and mingw32 need different sets of libraries
-        if self.gcc_version == "2.91.57":
-            # cygwin shouldn't need msvcrt, but without the dlls will crash
-            # (gcc version 2.91.57) -- perhaps something about initialization
-            self.dll_libraries=["msvcrt"]
-            self.warn(
-                "Consider upgrading to a newer version of gcc")
-        else:
-            # Include the appropriate MSVC runtime library if Python was built
-            # with MSVC 7.0 or later.
-            self.dll_libraries = get_msvcr()
-
-    def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
-        """Compiles the source by spawning GCC and windres if needed."""
-        if ext == '.rc' or ext == '.res':
-            # gcc needs '.res' and '.rc' compiled to object files !!!
-            try:
-                self.spawn(["windres", "-i", src, "-o", obj])
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-        else: # for other files use the C-compiler
-            try:
-                self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
-                           extra_postargs)
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-    def link(self, target_desc, objects, output_filename, output_dir=None,
-             libraries=None, library_dirs=None, runtime_library_dirs=None,
-             export_symbols=None, debug=0, extra_preargs=None,
-             extra_postargs=None, build_temp=None, target_lang=None):
-        """Link the objects."""
-        # use separate copies, so we can modify the lists
-        extra_preargs = copy.copy(extra_preargs or [])
-        libraries = copy.copy(libraries or [])
-        objects = copy.copy(objects or [])
-
-        # Additional libraries
-        libraries.extend(self.dll_libraries)
-
-        # handle export symbols by creating a def-file
-        # with executables this only works with gcc/ld as linker
-        if ((export_symbols is not None) and
-            (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):
-            # (The linker doesn't do anything if output is up-to-date.
-            # So it would probably better to check if we really need this,
-            # but for this we had to insert some unchanged parts of
-            # UnixCCompiler, and this is not what we want.)
-
-            # we want to put some files in the same directory as the
-            # object files are, build_temp doesn't help much
-            # where are the object files
-            temp_dir = os.path.dirname(objects[0])
-            # name of dll to give the helper files the same base name
-            (dll_name, dll_extension) = os.path.splitext(
-                os.path.basename(output_filename))
-
-            # generate the filenames for these files
-            def_file = os.path.join(temp_dir, dll_name + ".def")
-            lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a")
-
-            # Generate .def file
-            contents = [
-                "LIBRARY %s" % os.path.basename(output_filename),
-                "EXPORTS"]
-            for sym in export_symbols:
-                contents.append(sym)
-            self.execute(write_file, (def_file, contents),
-                         "writing %s" % def_file)
-
-            # next add options for def-file and to creating import libraries
-
-            # dllwrap uses different options than gcc/ld
-            if self.linker_dll == "dllwrap":
-                extra_preargs.extend(["--output-lib", lib_file])
-                # for dllwrap we have to use a special option
-                extra_preargs.extend(["--def", def_file])
-            # we use gcc/ld here and can be sure ld is >= 2.9.10
-            else:
-                # doesn't work: bfd_close build\...\libfoo.a: Invalid operation
-                #extra_preargs.extend(["-Wl,--out-implib,%s" % lib_file])
-                # for gcc/ld the def-file is specified as any object files
-                objects.append(def_file)
-
-        #end: if ((export_symbols is not None) and
-        #        (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):
-
-        # who wants symbols and a many times larger output file
-        # should explicitly switch the debug mode on
-        # otherwise we let dllwrap/ld strip the output file
-        # (On my machine: 10KiB < stripped_file < ??100KiB
-        #   unstripped_file = stripped_file + XXX KiB
-        #  ( XXX=254 for a typical python extension))
-        if not debug:
-            extra_preargs.append("-s")
-
-        UnixCCompiler.link(self, target_desc, objects, output_filename,
-                           output_dir, libraries, library_dirs,
-                           runtime_library_dirs,
-                           None, # export_symbols, we do this in our def-file
-                           debug, extra_preargs, extra_postargs, build_temp,
-                           target_lang)
-
-    # -- Miscellaneous methods -----------------------------------------
-
-    def object_filenames(self, source_filenames, strip_dir=0, output_dir=''):
-        """Adds supports for rc and res files."""
-        if output_dir is None:
-            output_dir = ''
-        obj_names = []
-        for src_name in source_filenames:
-            # use normcase to make sure '.rc' is really '.rc' and not '.RC'
-            base, ext = os.path.splitext(os.path.normcase(src_name))
-            if ext not in (self.src_extensions + ['.rc','.res']):
-                raise UnknownFileError("unknown file type '%s' (from '%s')" % \
-                      (ext, src_name))
-            if strip_dir:
-                base = os.path.basename (base)
-            if ext in ('.res', '.rc'):
-                # these need to be compiled to object files
-                obj_names.append (os.path.join(output_dir,
-                                              base + ext + self.obj_extension))
-            else:
-                obj_names.append (os.path.join(output_dir,
-                                               base + self.obj_extension))
-        return obj_names
-
-# the same as cygwin plus some additional parameters
-class Mingw32CCompiler(CygwinCCompiler):
-    """ Handles the Mingw32 port of the GNU C compiler to Windows.
-    """
-    compiler_type = 'mingw32'
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-
-        CygwinCCompiler.__init__ (self, verbose, dry_run, force)
-
-        # ld_version >= "2.13" support -shared so use it instead of
-        # -mdll -static
-        if self.ld_version >= "2.13":
-            shared_option = "-shared"
-        else:
-            shared_option = "-mdll -static"
-
-        # A real mingw32 doesn't need to specify a different entry point,
-        # but cygwin 2.91.57 in no-cygwin-mode needs it.
-        if self.gcc_version <= "2.91.57":
-            entry_point = '--entry _DllMain@12'
-        else:
-            entry_point = ''
-
-        if is_cygwingcc():
-            raise CCompilerError(
-                'Cygwin gcc cannot be used with --compiler=mingw32')
-
-        self.set_executables(compiler='gcc -O -Wall',
-                             compiler_so='gcc -mdll -O -Wall',
-                             compiler_cxx='g++ -O -Wall',
-                             linker_exe='gcc',
-                             linker_so='%s %s %s'
-                                        % (self.linker_dll, shared_option,
-                                           entry_point))
-        # Maybe we should also append -mthreads, but then the finished
-        # dlls need another dll (mingwm10.dll see Mingw32 docs)
-        # (-mthreads: Support thread-safe exception handling on `Mingw32')
-
-        # no additional libraries needed
-        self.dll_libraries=[]
-
-        # Include the appropriate MSVC runtime library if Python was built
-        # with MSVC 7.0 or later.
-        self.dll_libraries = get_msvcr()
-
-# Because these compilers aren't configured in Python's pyconfig.h file by
-# default, we should at least warn the user if he is using an unmodified
-# version.
-
-CONFIG_H_OK = "ok"
-CONFIG_H_NOTOK = "not ok"
-CONFIG_H_UNCERTAIN = "uncertain"
-
-def check_config_h():
-    """Check if the current Python installation appears amenable to building
-    extensions with GCC.
-
-    Returns a tuple (status, details), where 'status' is one of the following
-    constants:
-
-    - CONFIG_H_OK: all is well, go ahead and compile
-    - CONFIG_H_NOTOK: doesn't look good
-    - CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h
-
-    'details' is a human-readable string explaining the situation.
-
-    Note there are two ways to conclude "OK": either 'sys.version' contains
-    the string "GCC" (implying that this Python was built with GCC), or the
-    installed "pyconfig.h" contains the string "__GNUC__".
-    """
-
-    # XXX since this function also checks sys.version, it's not strictly a
-    # "pyconfig.h" check -- should probably be renamed...
-
-    from distutils import sysconfig
-
-    # if sys.version contains GCC then python was compiled with GCC, and the
-    # pyconfig.h file should be OK
-    if "GCC" in sys.version:
-        return CONFIG_H_OK, "sys.version mentions 'GCC'"
-
-    # let's see if __GNUC__ is mentioned in python.h
-    fn = sysconfig.get_config_h_filename()
-    try:
-        config_h = open(fn)
-        try:
-            if "__GNUC__" in config_h.read():
-                return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn
-            else:
-                return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn
-        finally:
-            config_h.close()
-    except OSError as exc:
-        return (CONFIG_H_UNCERTAIN,
-                "couldn't read '%s': %s" % (fn, exc.strerror))
-
-RE_VERSION = re.compile(br'(\d+\.\d+(\.\d+)*)')
-
-def _find_exe_version(cmd):
-    """Find the version of an executable by running `cmd` in the shell.
-
-    If the command is not found, or the output does not match
-    `RE_VERSION`, returns None.
-    """
-    executable = cmd.split()[0]
-    if find_executable(executable) is None:
-        return None
-    out = Popen(cmd, shell=True, stdout=PIPE).stdout
-    try:
-        out_string = out.read()
-    finally:
-        out.close()
-    result = RE_VERSION.search(out_string)
-    if result is None:
-        return None
-    # LooseVersion works with strings
-    # so we need to decode our bytes
-    return LooseVersion(result.group(1).decode())
-
-def get_versions():
-    """ Try to find out the versions of gcc, ld and dllwrap.
-
-    If not possible it returns None for it.
-    """
-    commands = ['gcc -dumpversion', 'ld -v', 'dllwrap --version']
-    return tuple([_find_exe_version(cmd) for cmd in commands])
-
-def is_cygwingcc():
-    '''Try to determine if the gcc that would be used is from cygwin.'''
-    out_string = check_output(['gcc', '-dumpmachine'])
-    return out_string.strip().endswith(b'cygwin')
diff --git a/contrib/tools/python3/src/Lib/distutils/debug.py b/contrib/tools/python3/src/Lib/distutils/debug.py
deleted file mode 100644
index daf1660f0d..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/debug.py
+++ /dev/null
@@ -1,5 +0,0 @@
-import os
-
-# If DISTUTILS_DEBUG is anything other than the empty string, we run in
-# debug mode.
-DEBUG = os.environ.get('DISTUTILS_DEBUG')
diff --git a/contrib/tools/python3/src/Lib/distutils/dep_util.py b/contrib/tools/python3/src/Lib/distutils/dep_util.py
deleted file mode 100644
index d74f5e4e92..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/dep_util.py
+++ /dev/null
@@ -1,92 +0,0 @@
-"""distutils.dep_util
-
-Utility functions for simple, timestamp-based dependency of files
-and groups of files; also, function based entirely on such
-timestamp dependency analysis."""
-
-import os
-from distutils.errors import DistutilsFileError
-
-
-def newer (source, target):
-    """Return true if 'source' exists and is more recently modified than
-    'target', or if 'source' exists and 'target' doesn't.  Return false if
-    both exist and 'target' is the same age or younger than 'source'.
-    Raise DistutilsFileError if 'source' does not exist.
-    """
-    if not os.path.exists(source):
-        raise DistutilsFileError("file '%s' does not exist" %
-                                 os.path.abspath(source))
-    if not os.path.exists(target):
-        return 1
-
-    from stat import ST_MTIME
-    mtime1 = os.stat(source)[ST_MTIME]
-    mtime2 = os.stat(target)[ST_MTIME]
-
-    return mtime1 > mtime2
-
-# newer ()
-
-
-def newer_pairwise (sources, targets):
-    """Walk two filename lists in parallel, testing if each source is newer
-    than its corresponding target.  Return a pair of lists (sources,
-    targets) where source is newer than target, according to the semantics
-    of 'newer()'.
-    """
-    if len(sources) != len(targets):
-        raise ValueError("'sources' and 'targets' must be same length")
-
-    # build a pair of lists (sources, targets) where  source is newer
-    n_sources = []
-    n_targets = []
-    for i in range(len(sources)):
-        if newer(sources[i], targets[i]):
-            n_sources.append(sources[i])
-            n_targets.append(targets[i])
-
-    return (n_sources, n_targets)
-
-# newer_pairwise ()
-
-
-def newer_group (sources, target, missing='error'):
-    """Return true if 'target' is out-of-date with respect to any file
-    listed in 'sources'.  In other words, if 'target' exists and is newer
-    than every file in 'sources', return false; otherwise return true.
-    'missing' controls what we do when a source file is missing; the
-    default ("error") is to blow up with an OSError from inside 'stat()';
-    if it is "ignore", we silently drop any missing source files; if it is
-    "newer", any missing source files make us assume that 'target' is
-    out-of-date (this is handy in "dry-run" mode: it'll make you pretend to
-    carry out commands that wouldn't work because inputs are missing, but
-    that doesn't matter because you're not actually going to run the
-    commands).
-    """
-    # If the target doesn't even exist, then it's definitely out-of-date.
-    if not os.path.exists(target):
-        return 1
-
-    # Otherwise we have to find out the hard way: if *any* source file
-    # is more recent than 'target', then 'target' is out-of-date and
-    # we can immediately return true.  If we fall through to the end
-    # of the loop, then 'target' is up-to-date and we return false.
-    from stat import ST_MTIME
-    target_mtime = os.stat(target)[ST_MTIME]
-    for source in sources:
-        if not os.path.exists(source):
-            if missing == 'error':      # blow up when we stat() the file
-                pass
-            elif missing == 'ignore':   # missing source dropped from
-                continue                #  target's dependency list
-            elif missing == 'newer':    # missing source means target is
-                return 1                #  out-of-date
-
-        source_mtime = os.stat(source)[ST_MTIME]
-        if source_mtime > target_mtime:
-            return 1
-    else:
-        return 0
-
-# newer_group ()
diff --git a/contrib/tools/python3/src/Lib/distutils/dir_util.py b/contrib/tools/python3/src/Lib/distutils/dir_util.py
deleted file mode 100644
index d5cd8e3e24..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/dir_util.py
+++ /dev/null
@@ -1,210 +0,0 @@
-"""distutils.dir_util
-
-Utility functions for manipulating directories and directory trees."""
-
-import os
-import errno
-from distutils.errors import DistutilsFileError, DistutilsInternalError
-from distutils import log
-
-# cache for by mkpath() -- in addition to cheapening redundant calls,
-# eliminates redundant "creating /foo/bar/baz" messages in dry-run mode
-_path_created = {}
-
-# I don't use os.makedirs because a) it's new to Python 1.5.2, and
-# b) it blows up if the directory already exists (I want to silently
-# succeed in that case).
-def mkpath(name, mode=0o777, verbose=1, dry_run=0):
-    """Create a directory and any missing ancestor directories.
-
-    If the directory already exists (or if 'name' is the empty string, which
-    means the current directory, which of course exists), then do nothing.
-    Raise DistutilsFileError if unable to create some directory along the way
-    (eg. some sub-path exists, but is a file rather than a directory).
-    If 'verbose' is true, print a one-line summary of each mkdir to stdout.
-    Return the list of directories actually created.
-    """
-
-    global _path_created
-
-    # Detect a common bug -- name is None
-    if not isinstance(name, str):
-        raise DistutilsInternalError(
-              "mkpath: 'name' must be a string (got %r)" % (name,))
-
-    # XXX what's the better way to handle verbosity? print as we create
-    # each directory in the path (the current behaviour), or only announce
-    # the creation of the whole path? (quite easy to do the latter since
-    # we're not using a recursive algorithm)
-
-    name = os.path.normpath(name)
-    created_dirs = []
-    if os.path.isdir(name) or name == '':
-        return created_dirs
-    if _path_created.get(os.path.abspath(name)):
-        return created_dirs
-
-    (head, tail) = os.path.split(name)
-    tails = [tail]                      # stack of lone dirs to create
-
-    while head and tail and not os.path.isdir(head):
-        (head, tail) = os.path.split(head)
-        tails.insert(0, tail)          # push next higher dir onto stack
-
-    # now 'head' contains the deepest directory that already exists
-    # (that is, the child of 'head' in 'name' is the highest directory
-    # that does *not* exist)
-    for d in tails:
-        #print "head = %s, d = %s: " % (head, d),
-        head = os.path.join(head, d)
-        abs_head = os.path.abspath(head)
-
-        if _path_created.get(abs_head):
-            continue
-
-        if verbose >= 1:
-            log.info("creating %s", head)
-
-        if not dry_run:
-            try:
-                os.mkdir(head, mode)
-            except OSError as exc:
-                if not (exc.errno == errno.EEXIST and os.path.isdir(head)):
-                    raise DistutilsFileError(
-                          "could not create '%s': %s" % (head, exc.args[-1]))
-            created_dirs.append(head)
-
-        _path_created[abs_head] = 1
-    return created_dirs
-
-def create_tree(base_dir, files, mode=0o777, verbose=1, dry_run=0):
-    """Create all the empty directories under 'base_dir' needed to put 'files'
-    there.
-
-    'base_dir' is just the name of a directory which doesn't necessarily
-    exist yet; 'files' is a list of filenames to be interpreted relative to
-    'base_dir'.  'base_dir' + the directory portion of every file in 'files'
-    will be created if it doesn't already exist.  'mode', 'verbose' and
-    'dry_run' flags are as for 'mkpath()'.
-    """
-    # First get the list of directories to create
-    need_dir = set()
-    for file in files:
-        need_dir.add(os.path.join(base_dir, os.path.dirname(file)))
-
-    # Now create them
-    for dir in sorted(need_dir):
-        mkpath(dir, mode, verbose=verbose, dry_run=dry_run)
-
-def copy_tree(src, dst, preserve_mode=1, preserve_times=1,
-              preserve_symlinks=0, update=0, verbose=1, dry_run=0):
-    """Copy an entire directory tree 'src' to a new location 'dst'.
-
-    Both 'src' and 'dst' must be directory names.  If 'src' is not a
-    directory, raise DistutilsFileError.  If 'dst' does not exist, it is
-    created with 'mkpath()'.  The end result of the copy is that every
-    file in 'src' is copied to 'dst', and directories under 'src' are
-    recursively copied to 'dst'.  Return the list of files that were
-    copied or might have been copied, using their output name.  The
-    return value is unaffected by 'update' or 'dry_run': it is simply
-    the list of all files under 'src', with the names changed to be
-    under 'dst'.
-
-    'preserve_mode' and 'preserve_times' are the same as for
-    'copy_file'; note that they only apply to regular files, not to
-    directories.  If 'preserve_symlinks' is true, symlinks will be
-    copied as symlinks (on platforms that support them!); otherwise
-    (the default), the destination of the symlink will be copied.
-    'update' and 'verbose' are the same as for 'copy_file'.
-    """
-    from distutils.file_util import copy_file
-
-    if not dry_run and not os.path.isdir(src):
-        raise DistutilsFileError(
-              "cannot copy tree '%s': not a directory" % src)
-    try:
-        names = os.listdir(src)
-    except OSError as e:
-        if dry_run:
-            names = []
-        else:
-            raise DistutilsFileError(
-                  "error listing files in '%s': %s" % (src, e.strerror))
-
-    if not dry_run:
-        mkpath(dst, verbose=verbose)
-
-    outputs = []
-
-    for n in names:
-        src_name = os.path.join(src, n)
-        dst_name = os.path.join(dst, n)
-
-        if n.startswith('.nfs'):
-            # skip NFS rename files
-            continue
-
-        if preserve_symlinks and os.path.islink(src_name):
-            link_dest = os.readlink(src_name)
-            if verbose >= 1:
-                log.info("linking %s -> %s", dst_name, link_dest)
-            if not dry_run:
-                os.symlink(link_dest, dst_name)
-            outputs.append(dst_name)
-
-        elif os.path.isdir(src_name):
-            outputs.extend(
-                copy_tree(src_name, dst_name, preserve_mode,
-                          preserve_times, preserve_symlinks, update,
-                          verbose=verbose, dry_run=dry_run))
-        else:
-            copy_file(src_name, dst_name, preserve_mode,
-                      preserve_times, update, verbose=verbose,
-                      dry_run=dry_run)
-            outputs.append(dst_name)
-
-    return outputs
-
-def _build_cmdtuple(path, cmdtuples):
-    """Helper for remove_tree()."""
-    for f in os.listdir(path):
-        real_f = os.path.join(path,f)
-        if os.path.isdir(real_f) and not os.path.islink(real_f):
-            _build_cmdtuple(real_f, cmdtuples)
-        else:
-            cmdtuples.append((os.remove, real_f))
-    cmdtuples.append((os.rmdir, path))
-
-def remove_tree(directory, verbose=1, dry_run=0):
-    """Recursively remove an entire directory tree.
-
-    Any errors are ignored (apart from being reported to stdout if 'verbose'
-    is true).
-    """
-    global _path_created
-
-    if verbose >= 1:
-        log.info("removing '%s' (and everything under it)", directory)
-    if dry_run:
-        return
-    cmdtuples = []
-    _build_cmdtuple(directory, cmdtuples)
-    for cmd in cmdtuples:
-        try:
-            cmd[0](cmd[1])
-            # remove dir from cache if it's already there
-            abspath = os.path.abspath(cmd[1])
-            if abspath in _path_created:
-                del _path_created[abspath]
-        except OSError as exc:
-            log.warn("error removing %s: %s", directory, exc)
-
-def ensure_relative(path):
-    """Take the full path 'path', and make it a relative path.
-
-    This is useful to make 'path' the second argument to os.path.join().
-    """
-    drive, path = os.path.splitdrive(path)
-    if path[0:1] == os.sep:
-        path = drive + path[1:]
-    return path
diff --git a/contrib/tools/python3/src/Lib/distutils/dist.py b/contrib/tools/python3/src/Lib/distutils/dist.py
deleted file mode 100644
index 6cf0a0d663..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/dist.py
+++ /dev/null
@@ -1,1256 +0,0 @@
-"""distutils.dist
-
-Provides the Distribution class, which represents the module distribution
-being built/installed/distributed.
-"""
-
-import sys
-import os
-import re
-from email import message_from_file
-
-try:
-    import warnings
-except ImportError:
-    warnings = None
-
-from distutils.errors import *
-from distutils.fancy_getopt import FancyGetopt, translate_longopt
-from distutils.util import check_environ, strtobool, rfc822_escape
-from distutils import log
-from distutils.debug import DEBUG
-
-# Regex to define acceptable Distutils command names.  This is not *quite*
-# the same as a Python NAME -- I don't allow leading underscores.  The fact
-# that they're very similar is no coincidence; the default naming scheme is
-# to look for a Python module named after the command.
-command_re = re.compile(r'^[a-zA-Z]([a-zA-Z0-9_]*)$')
-
-
-def _ensure_list(value, fieldname):
-    if isinstance(value, str):
-        # a string containing comma separated values is okay.  It will
-        # be converted to a list by Distribution.finalize_options().
-        pass
-    elif not isinstance(value, list):
-        # passing a tuple or an iterator perhaps, warn and convert
-        typename = type(value).__name__
-        msg = f"Warning: '{fieldname}' should be a list, got type '{typename}'"
-        log.log(log.WARN, msg)
-        value = list(value)
-    return value
-
-
-class Distribution:
-    """The core of the Distutils.  Most of the work hiding behind 'setup'
-    is really done within a Distribution instance, which farms the work out
-    to the Distutils commands specified on the command line.
-
-    Setup scripts will almost never instantiate Distribution directly,
-    unless the 'setup()' function is totally inadequate to their needs.
-    However, it is conceivable that a setup script might wish to subclass
-    Distribution for some specialized purpose, and then pass the subclass
-    to 'setup()' as the 'distclass' keyword argument.  If so, it is
-    necessary to respect the expectations that 'setup' has of Distribution.
-    See the code for 'setup()', in core.py, for details.
-    """
-
-    # 'global_options' describes the command-line options that may be
-    # supplied to the setup script prior to any actual commands.
-    # Eg. "./setup.py -n" or "./setup.py --quiet" both take advantage of
-    # these global options.  This list should be kept to a bare minimum,
-    # since every global option is also valid as a command option -- and we
-    # don't want to pollute the commands with too many options that they
-    # have minimal control over.
-    # The fourth entry for verbose means that it can be repeated.
-    global_options = [
-        ('verbose', 'v', "run verbosely (default)", 1),
-        ('quiet', 'q', "run quietly (turns verbosity off)"),
-        ('dry-run', 'n', "don't actually do anything"),
-        ('help', 'h', "show detailed help message"),
-        ('no-user-cfg', None,
-            'ignore pydistutils.cfg in your home directory'),
-    ]
-
-    # 'common_usage' is a short (2-3 line) string describing the common
-    # usage of the setup script.
-    common_usage = """\
-Common commands: (see '--help-commands' for more)
-
-  setup.py build      will build the package underneath 'build/'
-  setup.py install    will install the package
-"""
-
-    # options that are not propagated to the commands
-    display_options = [
-        ('help-commands', None,
-         "list all available commands"),
-        ('name', None,
-         "print package name"),
-        ('version', 'V',
-         "print package version"),
-        ('fullname', None,
-         "print <package name>-<version>"),
-        ('author', None,
-         "print the author's name"),
-        ('author-email', None,
-         "print the author's email address"),
-        ('maintainer', None,
-         "print the maintainer's name"),
-        ('maintainer-email', None,
-         "print the maintainer's email address"),
-        ('contact', None,
-         "print the maintainer's name if known, else the author's"),
-        ('contact-email', None,
-         "print the maintainer's email address if known, else the author's"),
-        ('url', None,
-         "print the URL for this package"),
-        ('license', None,
-         "print the license of the package"),
-        ('licence', None,
-         "alias for --license"),
-        ('description', None,
-         "print the package description"),
-        ('long-description', None,
-         "print the long package description"),
-        ('platforms', None,
-         "print the list of platforms"),
-        ('classifiers', None,
-         "print the list of classifiers"),
-        ('keywords', None,
-         "print the list of keywords"),
-        ('provides', None,
-         "print the list of packages/modules provided"),
-        ('requires', None,
-         "print the list of packages/modules required"),
-        ('obsoletes', None,
-         "print the list of packages/modules made obsolete")
-        ]
-    display_option_names = [translate_longopt(x[0]) for x in display_options]
-
-    # negative options are options that exclude other options
-    negative_opt = {'quiet': 'verbose'}
-
-    # -- Creation/initialization methods -------------------------------
-
-    def __init__(self, attrs=None):
-        """Construct a new Distribution instance: initialize all the
-        attributes of a Distribution, and then use 'attrs' (a dictionary
-        mapping attribute names to values) to assign some of those
-        attributes their "real" values.  (Any attributes not mentioned in
-        'attrs' will be assigned to some null value: 0, None, an empty list
-        or dictionary, etc.)  Most importantly, initialize the
-        'command_obj' attribute to the empty dictionary; this will be
-        filled in with real command objects by 'parse_command_line()'.
-        """
-
-        # Default values for our command-line options
-        self.verbose = 1
-        self.dry_run = 0
-        self.help = 0
-        for attr in self.display_option_names:
-            setattr(self, attr, 0)
-
-        # Store the distribution meta-data (name, version, author, and so
-        # forth) in a separate object -- we're getting to have enough
-        # information here (and enough command-line options) that it's
-        # worth it.  Also delegate 'get_XXX()' methods to the 'metadata'
-        # object in a sneaky and underhanded (but efficient!) way.
-        self.metadata = DistributionMetadata()
-        for basename in self.metadata._METHOD_BASENAMES:
-            method_name = "get_" + basename
-            setattr(self, method_name, getattr(self.metadata, method_name))
-
-        # 'cmdclass' maps command names to class objects, so we
-        # can 1) quickly figure out which class to instantiate when
-        # we need to create a new command object, and 2) have a way
-        # for the setup script to override command classes
-        self.cmdclass = {}
-
-        # 'command_packages' is a list of packages in which commands
-        # are searched for.  The factory for command 'foo' is expected
-        # to be named 'foo' in the module 'foo' in one of the packages
-        # named here.  This list is searched from the left; an error
-        # is raised if no named package provides the command being
-        # searched for.  (Always access using get_command_packages().)
-        self.command_packages = None
-
-        # 'script_name' and 'script_args' are usually set to sys.argv[0]
-        # and sys.argv[1:], but they can be overridden when the caller is
-        # not necessarily a setup script run from the command-line.
-        self.script_name = None
-        self.script_args = None
-
-        # 'command_options' is where we store command options between
-        # parsing them (from config files, the command-line, etc.) and when
-        # they are actually needed -- ie. when the command in question is
-        # instantiated.  It is a dictionary of dictionaries of 2-tuples:
-        #   command_options = { command_name : { option : (source, value) } }
-        self.command_options = {}
-
-        # 'dist_files' is the list of (command, pyversion, file) that
-        # have been created by any dist commands run so far. This is
-        # filled regardless of whether the run is dry or not. pyversion
-        # gives sysconfig.get_python_version() if the dist file is
-        # specific to a Python version, 'any' if it is good for all
-        # Python versions on the target platform, and '' for a source
-        # file. pyversion should not be used to specify minimum or
-        # maximum required Python versions; use the metainfo for that
-        # instead.
-        self.dist_files = []
-
-        # These options are really the business of various commands, rather
-        # than of the Distribution itself.  We provide aliases for them in
-        # Distribution as a convenience to the developer.
-        self.packages = None
-        self.package_data = {}
-        self.package_dir = None
-        self.py_modules = None
-        self.libraries = None
-        self.headers = None
-        self.ext_modules = None
-        self.ext_package = None
-        self.include_dirs = None
-        self.extra_path = None
-        self.scripts = None
-        self.data_files = None
-        self.password = ''
-
-        # And now initialize bookkeeping stuff that can't be supplied by
-        # the caller at all.  'command_obj' maps command names to
-        # Command instances -- that's how we enforce that every command
-        # class is a singleton.
-        self.command_obj = {}
-
-        # 'have_run' maps command names to boolean values; it keeps track
-        # of whether we have actually run a particular command, to make it
-        # cheap to "run" a command whenever we think we might need to -- if
-        # it's already been done, no need for expensive filesystem
-        # operations, we just check the 'have_run' dictionary and carry on.
-        # It's only safe to query 'have_run' for a command class that has
-        # been instantiated -- a false value will be inserted when the
-        # command object is created, and replaced with a true value when
-        # the command is successfully run.  Thus it's probably best to use
-        # '.get()' rather than a straight lookup.
-        self.have_run = {}
-
-        # Now we'll use the attrs dictionary (ultimately, keyword args from
-        # the setup script) to possibly override any or all of these
-        # distribution options.
-
-        if attrs:
-            # Pull out the set of command options and work on them
-            # specifically.  Note that this order guarantees that aliased
-            # command options will override any supplied redundantly
-            # through the general options dictionary.
-            options = attrs.get('options')
-            if options is not None:
-                del attrs['options']
-                for (command, cmd_options) in options.items():
-                    opt_dict = self.get_option_dict(command)
-                    for (opt, val) in cmd_options.items():
-                        opt_dict[opt] = ("setup script", val)
-
-            if 'licence' in attrs:
-                attrs['license'] = attrs['licence']
-                del attrs['licence']
-                msg = "'licence' distribution option is deprecated; use 'license'"
-                if warnings is not None:
-                    warnings.warn(msg)
-                else:
-                    sys.stderr.write(msg + "\n")
-
-            # Now work on the rest of the attributes.  Any attribute that's
-            # not already defined is invalid!
-            for (key, val) in attrs.items():
-                if hasattr(self.metadata, "set_" + key):
-                    getattr(self.metadata, "set_" + key)(val)
-                elif hasattr(self.metadata, key):
-                    setattr(self.metadata, key, val)
-                elif hasattr(self, key):
-                    setattr(self, key, val)
-                else:
-                    msg = "Unknown distribution option: %s" % repr(key)
-                    warnings.warn(msg)
-
-        # no-user-cfg is handled before other command line args
-        # because other args override the config files, and this
-        # one is needed before we can load the config files.
-        # If attrs['script_args'] wasn't passed, assume false.
-        #
-        # This also make sure we just look at the global options
-        self.want_user_cfg = True
-
-        if self.script_args is not None:
-            for arg in self.script_args:
-                if not arg.startswith('-'):
-                    break
-                if arg == '--no-user-cfg':
-                    self.want_user_cfg = False
-                    break
-
-        self.finalize_options()
-
-    def get_option_dict(self, command):
-        """Get the option dictionary for a given command.  If that
-        command's option dictionary hasn't been created yet, then create it
-        and return the new dictionary; otherwise, return the existing
-        option dictionary.
-        """
-        dict = self.command_options.get(command)
-        if dict is None:
-            dict = self.command_options[command] = {}
-        return dict
-
-    def dump_option_dicts(self, header=None, commands=None, indent=""):
-        from pprint import pformat
-
-        if commands is None:             # dump all command option dicts
-            commands = sorted(self.command_options.keys())
-
-        if header is not None:
-            self.announce(indent + header)
-            indent = indent + "  "
-
-        if not commands:
-            self.announce(indent + "no commands known yet")
-            return
-
-        for cmd_name in commands:
-            opt_dict = self.command_options.get(cmd_name)
-            if opt_dict is None:
-                self.announce(indent +
-                              "no option dict for '%s' command" % cmd_name)
-            else:
-                self.announce(indent +
-                              "option dict for '%s' command:" % cmd_name)
-                out = pformat(opt_dict)
-                for line in out.split('\n'):
-                    self.announce(indent + "  " + line)
-
-    # -- Config file finding/parsing methods ---------------------------
-
-    def find_config_files(self):
-        """Find as many configuration files as should be processed for this
-        platform, and return a list of filenames in the order in which they
-        should be parsed.  The filenames returned are guaranteed to exist
-        (modulo nasty race conditions).
-
-        There are three possible config files: distutils.cfg in the
-        Distutils installation directory (ie. where the top-level
-        Distutils __inst__.py file lives), a file in the user's home
-        directory named .pydistutils.cfg on Unix and pydistutils.cfg
-        on Windows/Mac; and setup.cfg in the current directory.
-
-        The file in the user's home directory can be disabled with the
-        --no-user-cfg option.
-        """
-        files = []
-        check_environ()
-
-        # Where to look for the system-wide Distutils config file
-        sys_dir = os.path.dirname(sys.modules['distutils'].__file__)
-
-        # Look for the system config file
-        sys_file = os.path.join(sys_dir, "distutils.cfg")
-        if os.path.isfile(sys_file):
-            files.append(sys_file)
-
-        # What to call the per-user config file
-        if os.name == 'posix':
-            user_filename = ".pydistutils.cfg"
-        else:
-            user_filename = "pydistutils.cfg"
-
-        # And look for the user config file
-        if self.want_user_cfg:
-            user_file = os.path.join(os.path.expanduser('~'), user_filename)
-            if os.path.isfile(user_file):
-                files.append(user_file)
-
-        # All platforms support local setup.cfg
-        local_file = "setup.cfg"
-        if os.path.isfile(local_file):
-            files.append(local_file)
-
-        if DEBUG:
-            self.announce("using config files: %s" % ', '.join(files))
-
-        return files
-
-    def parse_config_files(self, filenames=None):
-        from configparser import ConfigParser
-
-        # Ignore install directory options if we have a venv
-        if sys.prefix != sys.base_prefix:
-            ignore_options = [
-                'install-base', 'install-platbase', 'install-lib',
-                'install-platlib', 'install-purelib', 'install-headers',
-                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
-                'home', 'user', 'root']
-        else:
-            ignore_options = []
-
-        ignore_options = frozenset(ignore_options)
-
-        if filenames is None:
-            filenames = self.find_config_files()
-
-        if DEBUG:
-            self.announce("Distribution.parse_config_files():")
-
-        parser = ConfigParser()
-        for filename in filenames:
-            if DEBUG:
-                self.announce("  reading %s" % filename)
-            parser.read(filename)
-            for section in parser.sections():
-                options = parser.options(section)
-                opt_dict = self.get_option_dict(section)
-
-                for opt in options:
-                    if opt != '__name__' and opt not in ignore_options:
-                        val = parser.get(section,opt)
-                        opt = opt.replace('-', '_')
-                        opt_dict[opt] = (filename, val)
-
-            # Make the ConfigParser forget everything (so we retain
-            # the original filenames that options come from)
-            parser.__init__()
-
-        # If there was a "global" section in the config file, use it
-        # to set Distribution options.
-
-        if 'global' in self.command_options:
-            for (opt, (src, val)) in self.command_options['global'].items():
-                alias = self.negative_opt.get(opt)
-                try:
-                    if alias:
-                        setattr(self, alias, not strtobool(val))
-                    elif opt in ('verbose', 'dry_run'): # ugh!
-                        setattr(self, opt, strtobool(val))
-                    else:
-                        setattr(self, opt, val)
-                except ValueError as msg:
-                    raise DistutilsOptionError(msg)
-
-    # -- Command-line parsing methods ----------------------------------
-
-    def parse_command_line(self):
-        """Parse the setup script's command line, taken from the
-        'script_args' instance attribute (which defaults to 'sys.argv[1:]'
-        -- see 'setup()' in core.py).  This list is first processed for
-        "global options" -- options that set attributes of the Distribution
-        instance.  Then, it is alternately scanned for Distutils commands
-        and options for that command.  Each new command terminates the
-        options for the previous command.  The allowed options for a
-        command are determined by the 'user_options' attribute of the
-        command class -- thus, we have to be able to load command classes
-        in order to parse the command line.  Any error in that 'options'
-        attribute raises DistutilsGetoptError; any error on the
-        command-line raises DistutilsArgError.  If no Distutils commands
-        were found on the command line, raises DistutilsArgError.  Return
-        true if command-line was successfully parsed and we should carry
-        on with executing commands; false if no errors but we shouldn't
-        execute commands (currently, this only happens if user asks for
-        help).
-        """
-        #
-        # We now have enough information to show the Macintosh dialog
-        # that allows the user to interactively specify the "command line".
-        #
-        toplevel_options = self._get_toplevel_options()
-
-        # We have to parse the command line a bit at a time -- global
-        # options, then the first command, then its options, and so on --
-        # because each command will be handled by a different class, and
-        # the options that are valid for a particular class aren't known
-        # until we have loaded the command class, which doesn't happen
-        # until we know what the command is.
-
-        self.commands = []
-        parser = FancyGetopt(toplevel_options + self.display_options)
-        parser.set_negative_aliases(self.negative_opt)
-        parser.set_aliases({'licence': 'license'})
-        args = parser.getopt(args=self.script_args, object=self)
-        option_order = parser.get_option_order()
-        log.set_verbosity(self.verbose)
-
-        # for display options we return immediately
-        if self.handle_display_options(option_order):
-            return
-        while args:
-            args = self._parse_command_opts(parser, args)
-            if args is None:            # user asked for help (and got it)
-                return
-
-        # Handle the cases of --help as a "global" option, ie.
-        # "setup.py --help" and "setup.py --help command ...".  For the
-        # former, we show global options (--verbose, --dry-run, etc.)
-        # and display-only options (--name, --version, etc.); for the
-        # latter, we omit the display-only options and show help for
-        # each command listed on the command line.
-        if self.help:
-            self._show_help(parser,
-                            display_options=len(self.commands) == 0,
-                            commands=self.commands)
-            return
-
-        # Oops, no commands found -- an end-user error
-        if not self.commands:
-            raise DistutilsArgError("no commands supplied")
-
-        # All is well: return true
-        return True
-
-    def _get_toplevel_options(self):
-        """Return the non-display options recognized at the top level.
-
-        This includes options that are recognized *only* at the top
-        level as well as options recognized for commands.
-        """
-        return self.global_options + [
-            ("command-packages=", None,
-             "list of packages that provide distutils commands"),
-            ]
-
-    def _parse_command_opts(self, parser, args):
-        """Parse the command-line options for a single command.
-        'parser' must be a FancyGetopt instance; 'args' must be the list
-        of arguments, starting with the current command (whose options
-        we are about to parse).  Returns a new version of 'args' with
-        the next command at the front of the list; will be the empty
-        list if there are no more commands on the command line.  Returns
-        None if the user asked for help on this command.
-        """
-        # late import because of mutual dependence between these modules
-        from distutils.cmd import Command
-
-        # Pull the current command from the head of the command line
-        command = args[0]
-        if not command_re.match(command):
-            raise SystemExit("invalid command name '%s'" % command)
-        self.commands.append(command)
-
-        # Dig up the command class that implements this command, so we
-        # 1) know that it's a valid command, and 2) know which options
-        # it takes.
-        try:
-            cmd_class = self.get_command_class(command)
-        except DistutilsModuleError as msg:
-            raise DistutilsArgError(msg)
-
-        # Require that the command class be derived from Command -- want
-        # to be sure that the basic "command" interface is implemented.
-        if not issubclass(cmd_class, Command):
-            raise DistutilsClassError(
-                "command class %s must subclass Command" % cmd_class)
-
-        # Also make sure that the command object provides a list of its
-        # known options.
-        if not (hasattr(cmd_class, 'user_options') and
-                isinstance(cmd_class.user_options, list)):
-            msg = ("command class %s must provide "
-                "'user_options' attribute (a list of tuples)")
-            raise DistutilsClassError(msg % cmd_class)
-
-        # If the command class has a list of negative alias options,
-        # merge it in with the global negative aliases.
-        negative_opt = self.negative_opt
-        if hasattr(cmd_class, 'negative_opt'):
-            negative_opt = negative_opt.copy()
-            negative_opt.update(cmd_class.negative_opt)
-
-        # Check for help_options in command class.  They have a different
-        # format (tuple of four) so we need to preprocess them here.
-        if (hasattr(cmd_class, 'help_options') and
-                isinstance(cmd_class.help_options, list)):
-            help_options = fix_help_options(cmd_class.help_options)
-        else:
-            help_options = []
-
-        # All commands support the global options too, just by adding
-        # in 'global_options'.
-        parser.set_option_table(self.global_options +
-                                cmd_class.user_options +
-                                help_options)
-        parser.set_negative_aliases(negative_opt)
-        (args, opts) = parser.getopt(args[1:])
-        if hasattr(opts, 'help') and opts.help:
-            self._show_help(parser, display_options=0, commands=[cmd_class])
-            return
-
-        if (hasattr(cmd_class, 'help_options') and
-                isinstance(cmd_class.help_options, list)):
-            help_option_found=0
-            for (help_option, short, desc, func) in cmd_class.help_options:
-                if hasattr(opts, parser.get_attr_name(help_option)):
-                    help_option_found=1
-                    if callable(func):
-                        func()
-                    else:
-                        raise DistutilsClassError(
-                            "invalid help function %r for help option '%s': "
-                            "must be a callable object (function, etc.)"
-                            % (func, help_option))
-
-            if help_option_found:
-                return
-
-        # Put the options from the command-line into their official
-        # holding pen, the 'command_options' dictionary.
-        opt_dict = self.get_option_dict(command)
-        for (name, value) in vars(opts).items():
-            opt_dict[name] = ("command line", value)
-
-        return args
-
-    def finalize_options(self):
-        """Set final values for all the options on the Distribution
-        instance, analogous to the .finalize_options() method of Command
-        objects.
-        """
-        for attr in ('keywords', 'platforms'):
-            value = getattr(self.metadata, attr)
-            if value is None:
-                continue
-            if isinstance(value, str):
-                value = [elm.strip() for elm in value.split(',')]
-                setattr(self.metadata, attr, value)
-
-    def _show_help(self, parser, global_options=1, display_options=1,
-                   commands=[]):
-        """Show help for the setup script command-line in the form of
-        several lists of command-line options.  'parser' should be a
-        FancyGetopt instance; do not expect it to be returned in the
-        same state, as its option table will be reset to make it
-        generate the correct help text.
-
-        If 'global_options' is true, lists the global options:
-        --verbose, --dry-run, etc.  If 'display_options' is true, lists
-        the "display-only" options: --name, --version, etc.  Finally,
-        lists per-command help for every command name or command class
-        in 'commands'.
-        """
-        # late import because of mutual dependence between these modules
-        from distutils.core import gen_usage
-        from distutils.cmd import Command
-
-        if global_options:
-            if display_options:
-                options = self._get_toplevel_options()
-            else:
-                options = self.global_options
-            parser.set_option_table(options)
-            parser.print_help(self.common_usage + "\nGlobal options:")
-            print('')
-
-        if display_options:
-            parser.set_option_table(self.display_options)
-            parser.print_help(
-                "Information display options (just display " +
-                "information, ignore any commands)")
-            print('')
-
-        for command in self.commands:
-            if isinstance(command, type) and issubclass(command, Command):
-                klass = command
-            else:
-                klass = self.get_command_class(command)
-            if (hasattr(klass, 'help_options') and
-                    isinstance(klass.help_options, list)):
-                parser.set_option_table(klass.user_options +
-                                        fix_help_options(klass.help_options))
-            else:
-                parser.set_option_table(klass.user_options)
-            parser.print_help("Options for '%s' command:" % klass.__name__)
-            print('')
-
-        print(gen_usage(self.script_name))
-
-    def handle_display_options(self, option_order):
-        """If there were any non-global "display-only" options
-        (--help-commands or the metadata display options) on the command
-        line, display the requested info and return true; else return
-        false.
-        """
-        from distutils.core import gen_usage
-
-        # User just wants a list of commands -- we'll print it out and stop
-        # processing now (ie. if they ran "setup --help-commands foo bar",
-        # we ignore "foo bar").
-        if self.help_commands:
-            self.print_commands()
-            print('')
-            print(gen_usage(self.script_name))
-            return 1
-
-        # If user supplied any of the "display metadata" options, then
-        # display that metadata in the order in which the user supplied the
-        # metadata options.
-        any_display_options = 0
-        is_display_option = {}
-        for option in self.display_options:
-            is_display_option[option[0]] = 1
-
-        for (opt, val) in option_order:
-            if val and is_display_option.get(opt):
-                opt = translate_longopt(opt)
-                value = getattr(self.metadata, "get_"+opt)()
-                if opt in ['keywords', 'platforms']:
-                    print(','.join(value))
-                elif opt in ('classifiers', 'provides', 'requires',
-                             'obsoletes'):
-                    print('\n'.join(value))
-                else:
-                    print(value)
-                any_display_options = 1
-
-        return any_display_options
-
-    def print_command_list(self, commands, header, max_length):
-        """Print a subset of the list of all commands -- used by
-        'print_commands()'.
-        """
-        print(header + ":")
-
-        for cmd in commands:
-            klass = self.cmdclass.get(cmd)
-            if not klass:
-                klass = self.get_command_class(cmd)
-            try:
-                description = klass.description
-            except AttributeError:
-                description = "(no description available)"
-
-            print("  %-*s  %s" % (max_length, cmd, description))
-
-    def print_commands(self):
-        """Print out a help message listing all available commands with a
-        description of each.  The list is divided into "standard commands"
-        (listed in distutils.command.__all__) and "extra commands"
-        (mentioned in self.cmdclass, but not a standard command).  The
-        descriptions come from the command class attribute
-        'description'.
-        """
-        import distutils.command
-        std_commands = distutils.command.__all__
-        is_std = {}
-        for cmd in std_commands:
-            is_std[cmd] = 1
-
-        extra_commands = []
-        for cmd in self.cmdclass.keys():
-            if not is_std.get(cmd):
-                extra_commands.append(cmd)
-
-        max_length = 0
-        for cmd in (std_commands + extra_commands):
-            if len(cmd) > max_length:
-                max_length = len(cmd)
-
-        self.print_command_list(std_commands,
-                                "Standard commands",
-                                max_length)
-        if extra_commands:
-            print()
-            self.print_command_list(extra_commands,
-                                    "Extra commands",
-                                    max_length)
-
-    def get_command_list(self):
-        """Get a list of (command, description) tuples.
-        The list is divided into "standard commands" (listed in
-        distutils.command.__all__) and "extra commands" (mentioned in
-        self.cmdclass, but not a standard command).  The descriptions come
-        from the command class attribute 'description'.
-        """
-        # Currently this is only used on Mac OS, for the Mac-only GUI
-        # Distutils interface (by Jack Jansen)
-        import distutils.command
-        std_commands = distutils.command.__all__
-        is_std = {}
-        for cmd in std_commands:
-            is_std[cmd] = 1
-
-        extra_commands = []
-        for cmd in self.cmdclass.keys():
-            if not is_std.get(cmd):
-                extra_commands.append(cmd)
-
-        rv = []
-        for cmd in (std_commands + extra_commands):
-            klass = self.cmdclass.get(cmd)
-            if not klass:
-                klass = self.get_command_class(cmd)
-            try:
-                description = klass.description
-            except AttributeError:
-                description = "(no description available)"
-            rv.append((cmd, description))
-        return rv
-
-    # -- Command class/object methods ----------------------------------
-
-    def get_command_packages(self):
-        """Return a list of packages from which commands are loaded."""
-        pkgs = self.command_packages
-        if not isinstance(pkgs, list):
-            if pkgs is None:
-                pkgs = ''
-            pkgs = [pkg.strip() for pkg in pkgs.split(',') if pkg != '']
-            if "distutils.command" not in pkgs:
-                pkgs.insert(0, "distutils.command")
-            self.command_packages = pkgs
-        return pkgs
-
-    def get_command_class(self, command):
-        """Return the class that implements the Distutils command named by
-        'command'.  First we check the 'cmdclass' dictionary; if the
-        command is mentioned there, we fetch the class object from the
-        dictionary and return it.  Otherwise we load the command module
-        ("distutils.command." + command) and fetch the command class from
-        the module.  The loaded class is also stored in 'cmdclass'
-        to speed future calls to 'get_command_class()'.
-
-        Raises DistutilsModuleError if the expected module could not be
-        found, or if that module does not define the expected class.
-        """
-        klass = self.cmdclass.get(command)
-        if klass:
-            return klass
-
-        for pkgname in self.get_command_packages():
-            module_name = "%s.%s" % (pkgname, command)
-            klass_name = command
-
-            try:
-                __import__(module_name)
-                module = sys.modules[module_name]
-            except ImportError:
-                continue
-
-            try:
-                klass = getattr(module, klass_name)
-            except AttributeError:
-                raise DistutilsModuleError(
-                    "invalid command '%s' (no class '%s' in module '%s')"
-                    % (command, klass_name, module_name))
-
-            self.cmdclass[command] = klass
-            return klass
-
-        raise DistutilsModuleError("invalid command '%s'" % command)
-
-    def get_command_obj(self, command, create=1):
-        """Return the command object for 'command'.  Normally this object
-        is cached on a previous call to 'get_command_obj()'; if no command
-        object for 'command' is in the cache, then we either create and
-        return it (if 'create' is true) or return None.
-        """
-        cmd_obj = self.command_obj.get(command)
-        if not cmd_obj and create:
-            if DEBUG:
-                self.announce("Distribution.get_command_obj(): "
-                              "creating '%s' command object" % command)
-
-            klass = self.get_command_class(command)
-            cmd_obj = self.command_obj[command] = klass(self)
-            self.have_run[command] = 0
-
-            # Set any options that were supplied in config files
-            # or on the command line.  (NB. support for error
-            # reporting is lame here: any errors aren't reported
-            # until 'finalize_options()' is called, which means
-            # we won't report the source of the error.)
-            options = self.command_options.get(command)
-            if options:
-                self._set_command_options(cmd_obj, options)
-
-        return cmd_obj
-
-    def _set_command_options(self, command_obj, option_dict=None):
-        """Set the options for 'command_obj' from 'option_dict'.  Basically
-        this means copying elements of a dictionary ('option_dict') to
-        attributes of an instance ('command').
-
-        'command_obj' must be a Command instance.  If 'option_dict' is not
-        supplied, uses the standard option dictionary for this command
-        (from 'self.command_options').
-        """
-        command_name = command_obj.get_command_name()
-        if option_dict is None:
-            option_dict = self.get_option_dict(command_name)
-
-        if DEBUG:
-            self.announce("  setting options for '%s' command:" % command_name)
-        for (option, (source, value)) in option_dict.items():
-            if DEBUG:
-                self.announce("    %s = %s (from %s)" % (option, value,
-                                                         source))
-            try:
-                bool_opts = [translate_longopt(o)
-                             for o in command_obj.boolean_options]
-            except AttributeError:
-                bool_opts = []
-            try:
-                neg_opt = command_obj.negative_opt
-            except AttributeError:
-                neg_opt = {}
-
-            try:
-                is_string = isinstance(value, str)
-                if option in neg_opt and is_string:
-                    setattr(command_obj, neg_opt[option], not strtobool(value))
-                elif option in bool_opts and is_string:
-                    setattr(command_obj, option, strtobool(value))
-                elif hasattr(command_obj, option):
-                    setattr(command_obj, option, value)
-                else:
-                    raise DistutilsOptionError(
-                        "error in %s: command '%s' has no such option '%s'"
-                        % (source, command_name, option))
-            except ValueError as msg:
-                raise DistutilsOptionError(msg)
-
-    def reinitialize_command(self, command, reinit_subcommands=0):
-        """Reinitializes a command to the state it was in when first
-        returned by 'get_command_obj()': ie., initialized but not yet
-        finalized.  This provides the opportunity to sneak option
-        values in programmatically, overriding or supplementing
-        user-supplied values from the config files and command line.
-        You'll have to re-finalize the command object (by calling
-        'finalize_options()' or 'ensure_finalized()') before using it for
-        real.
-
-        'command' should be a command name (string) or command object.  If
-        'reinit_subcommands' is true, also reinitializes the command's
-        sub-commands, as declared by the 'sub_commands' class attribute (if
-        it has one).  See the "install" command for an example.  Only
-        reinitializes the sub-commands that actually matter, ie. those
-        whose test predicates return true.
-
-        Returns the reinitialized command object.
-        """
-        from distutils.cmd import Command
-        if not isinstance(command, Command):
-            command_name = command
-            command = self.get_command_obj(command_name)
-        else:
-            command_name = command.get_command_name()
-
-        if not command.finalized:
-            return command
-        command.initialize_options()
-        command.finalized = 0
-        self.have_run[command_name] = 0
-        self._set_command_options(command)
-
-        if reinit_subcommands:
-            for sub in command.get_sub_commands():
-                self.reinitialize_command(sub, reinit_subcommands)
-
-        return command
-
-    # -- Methods that operate on the Distribution ----------------------
-
-    def announce(self, msg, level=log.INFO):
-        log.log(level, msg)
-
-    def run_commands(self):
-        """Run each command that was seen on the setup script command line.
-        Uses the list of commands found and cache of command objects
-        created by 'get_command_obj()'.
-        """
-        for cmd in self.commands:
-            self.run_command(cmd)
-
-    # -- Methods that operate on its Commands --------------------------
-
-    def run_command(self, command):
-        """Do whatever it takes to run a command (including nothing at all,
-        if the command has already been run).  Specifically: if we have
-        already created and run the command named by 'command', return
-        silently without doing anything.  If the command named by 'command'
-        doesn't even have a command object yet, create one.  Then invoke
-        'run()' on that command object (or an existing one).
-        """
-        # Already been here, done that? then return silently.
-        if self.have_run.get(command):
-            return
-
-        log.info("running %s", command)
-        cmd_obj = self.get_command_obj(command)
-        cmd_obj.ensure_finalized()
-        cmd_obj.run()
-        self.have_run[command] = 1
-
-    # -- Distribution query methods ------------------------------------
-
-    def has_pure_modules(self):
-        return len(self.packages or self.py_modules or []) > 0
-
-    def has_ext_modules(self):
-        return self.ext_modules and len(self.ext_modules) > 0
-
-    def has_c_libraries(self):
-        return self.libraries and len(self.libraries) > 0
-
-    def has_modules(self):
-        return self.has_pure_modules() or self.has_ext_modules()
-
-    def has_headers(self):
-        return self.headers and len(self.headers) > 0
-
-    def has_scripts(self):
-        return self.scripts and len(self.scripts) > 0
-
-    def has_data_files(self):
-        return self.data_files and len(self.data_files) > 0
-
-    def is_pure(self):
-        return (self.has_pure_modules() and
-                not self.has_ext_modules() and
-                not self.has_c_libraries())
-
-    # -- Metadata query methods ----------------------------------------
-
-    # If you're looking for 'get_name()', 'get_version()', and so forth,
-    # they are defined in a sneaky way: the constructor binds self.get_XXX
-    # to self.metadata.get_XXX.  The actual code is in the
-    # DistributionMetadata class, below.
-
-class DistributionMetadata:
-    """Dummy class to hold the distribution meta-data: name, version,
-    author, and so forth.
-    """
-
-    _METHOD_BASENAMES = ("name", "version", "author", "author_email",
-                         "maintainer", "maintainer_email", "url",
-                         "license", "description", "long_description",
-                         "keywords", "platforms", "fullname", "contact",
-                         "contact_email", "classifiers", "download_url",
-                         # PEP 314
-                         "provides", "requires", "obsoletes",
-                         )
-
-    def __init__(self, path=None):
-        if path is not None:
-            self.read_pkg_file(open(path))
-        else:
-            self.name = None
-            self.version = None
-            self.author = None
-            self.author_email = None
-            self.maintainer = None
-            self.maintainer_email = None
-            self.url = None
-            self.license = None
-            self.description = None
-            self.long_description = None
-            self.keywords = None
-            self.platforms = None
-            self.classifiers = None
-            self.download_url = None
-            # PEP 314
-            self.provides = None
-            self.requires = None
-            self.obsoletes = None
-
-    def read_pkg_file(self, file):
-        """Reads the metadata values from a file object."""
-        msg = message_from_file(file)
-
-        def _read_field(name):
-            value = msg[name]
-            if value == 'UNKNOWN':
-                return None
-            return value
-
-        def _read_list(name):
-            values = msg.get_all(name, None)
-            if values == []:
-                return None
-            return values
-
-        metadata_version = msg['metadata-version']
-        self.name = _read_field('name')
-        self.version = _read_field('version')
-        self.description = _read_field('summary')
-        # we are filling author only.
-        self.author = _read_field('author')
-        self.maintainer = None
-        self.author_email = _read_field('author-email')
-        self.maintainer_email = None
-        self.url = _read_field('home-page')
-        self.license = _read_field('license')
-
-        if 'download-url' in msg:
-            self.download_url = _read_field('download-url')
-        else:
-            self.download_url = None
-
-        self.long_description = _read_field('description')
-        self.description = _read_field('summary')
-
-        if 'keywords' in msg:
-            self.keywords = _read_field('keywords').split(',')
-
-        self.platforms = _read_list('platform')
-        self.classifiers = _read_list('classifier')
-
-        # PEP 314 - these fields only exist in 1.1
-        if metadata_version == '1.1':
-            self.requires = _read_list('requires')
-            self.provides = _read_list('provides')
-            self.obsoletes = _read_list('obsoletes')
-        else:
-            self.requires = None
-            self.provides = None
-            self.obsoletes = None
-
-    def write_pkg_info(self, base_dir):
-        """Write the PKG-INFO file into the release tree.
-        """
-        with open(os.path.join(base_dir, 'PKG-INFO'), 'w',
-                  encoding='UTF-8') as pkg_info:
-            self.write_pkg_file(pkg_info)
-
-    def write_pkg_file(self, file):
-        """Write the PKG-INFO format data to a file object.
-        """
-        version = '1.0'
-        if (self.provides or self.requires or self.obsoletes or
-                self.classifiers or self.download_url):
-            version = '1.1'
-
-        file.write('Metadata-Version: %s\n' % version)
-        file.write('Name: %s\n' % self.get_name())
-        file.write('Version: %s\n' % self.get_version())
-        file.write('Summary: %s\n' % self.get_description())
-        file.write('Home-page: %s\n' % self.get_url())
-        file.write('Author: %s\n' % self.get_contact())
-        file.write('Author-email: %s\n' % self.get_contact_email())
-        file.write('License: %s\n' % self.get_license())
-        if self.download_url:
-            file.write('Download-URL: %s\n' % self.download_url)
-
-        long_desc = rfc822_escape(self.get_long_description())
-        file.write('Description: %s\n' % long_desc)
-
-        keywords = ','.join(self.get_keywords())
-        if keywords:
-            file.write('Keywords: %s\n' % keywords)
-
-        self._write_list(file, 'Platform', self.get_platforms())
-        self._write_list(file, 'Classifier', self.get_classifiers())
-
-        # PEP 314
-        self._write_list(file, 'Requires', self.get_requires())
-        self._write_list(file, 'Provides', self.get_provides())
-        self._write_list(file, 'Obsoletes', self.get_obsoletes())
-
-    def _write_list(self, file, name, values):
-        for value in values:
-            file.write('%s: %s\n' % (name, value))
-
-    # -- Metadata query methods ----------------------------------------
-
-    def get_name(self):
-        return self.name or "UNKNOWN"
-
-    def get_version(self):
-        return self.version or "0.0.0"
-
-    def get_fullname(self):
-        return "%s-%s" % (self.get_name(), self.get_version())
-
-    def get_author(self):
-        return self.author or "UNKNOWN"
-
-    def get_author_email(self):
-        return self.author_email or "UNKNOWN"
-
-    def get_maintainer(self):
-        return self.maintainer or "UNKNOWN"
-
-    def get_maintainer_email(self):
-        return self.maintainer_email or "UNKNOWN"
-
-    def get_contact(self):
-        return self.maintainer or self.author or "UNKNOWN"
-
-    def get_contact_email(self):
-        return self.maintainer_email or self.author_email or "UNKNOWN"
-
-    def get_url(self):
-        return self.url or "UNKNOWN"
-
-    def get_license(self):
-        return self.license or "UNKNOWN"
-    get_licence = get_license
-
-    def get_description(self):
-        return self.description or "UNKNOWN"
-
-    def get_long_description(self):
-        return self.long_description or "UNKNOWN"
-
-    def get_keywords(self):
-        return self.keywords or []
-
-    def set_keywords(self, value):
-        self.keywords = _ensure_list(value, 'keywords')
-
-    def get_platforms(self):
-        return self.platforms or ["UNKNOWN"]
-
-    def set_platforms(self, value):
-        self.platforms = _ensure_list(value, 'platforms')
-
-    def get_classifiers(self):
-        return self.classifiers or []
-
-    def set_classifiers(self, value):
-        self.classifiers = _ensure_list(value, 'classifiers')
-
-    def get_download_url(self):
-        return self.download_url or "UNKNOWN"
-
-    # PEP 314
-    def get_requires(self):
-        return self.requires or []
-
-    def set_requires(self, value):
-        import distutils.versionpredicate
-        for v in value:
-            distutils.versionpredicate.VersionPredicate(v)
-        self.requires = list(value)
-
-    def get_provides(self):
-        return self.provides or []
-
-    def set_provides(self, value):
-        value = [v.strip() for v in value]
-        for v in value:
-            import distutils.versionpredicate
-            distutils.versionpredicate.split_provision(v)
-        self.provides = value
-
-    def get_obsoletes(self):
-        return self.obsoletes or []
-
-    def set_obsoletes(self, value):
-        import distutils.versionpredicate
-        for v in value:
-            distutils.versionpredicate.VersionPredicate(v)
-        self.obsoletes = list(value)
-
-def fix_help_options(options):
-    """Convert a 4-tuple 'help_options' list as found in various command
-    classes to the 3-tuple form required by FancyGetopt.
-    """
-    new_options = []
-    for help_tuple in options:
-        new_options.append(help_tuple[0:3])
-    return new_options
diff --git a/contrib/tools/python3/src/Lib/distutils/errors.py b/contrib/tools/python3/src/Lib/distutils/errors.py
deleted file mode 100644
index 8b93059e19..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/errors.py
+++ /dev/null
@@ -1,97 +0,0 @@
-"""distutils.errors
-
-Provides exceptions used by the Distutils modules.  Note that Distutils
-modules may raise standard exceptions; in particular, SystemExit is
-usually raised for errors that are obviously the end-user's fault
-(eg. bad command-line arguments).
-
-This module is safe to use in "from ... import *" mode; it only exports
-symbols whose names start with "Distutils" and end with "Error"."""
-
-class DistutilsError (Exception):
-    """The root of all Distutils evil."""
-    pass
-
-class DistutilsModuleError (DistutilsError):
-    """Unable to load an expected module, or to find an expected class
-    within some module (in particular, command modules and classes)."""
-    pass
-
-class DistutilsClassError (DistutilsError):
-    """Some command class (or possibly distribution class, if anyone
-    feels a need to subclass Distribution) is found not to be holding
-    up its end of the bargain, ie. implementing some part of the
-    "command "interface."""
-    pass
-
-class DistutilsGetoptError (DistutilsError):
-    """The option table provided to 'fancy_getopt()' is bogus."""
-    pass
-
-class DistutilsArgError (DistutilsError):
-    """Raised by fancy_getopt in response to getopt.error -- ie. an
-    error in the command line usage."""
-    pass
-
-class DistutilsFileError (DistutilsError):
-    """Any problems in the filesystem: expected file not found, etc.
-    Typically this is for problems that we detect before OSError
-    could be raised."""
-    pass
-
-class DistutilsOptionError (DistutilsError):
-    """Syntactic/semantic errors in command options, such as use of
-    mutually conflicting options, or inconsistent options,
-    badly-spelled values, etc.  No distinction is made between option
-    values originating in the setup script, the command line, config
-    files, or what-have-you -- but if we *know* something originated in
-    the setup script, we'll raise DistutilsSetupError instead."""
-    pass
-
-class DistutilsSetupError (DistutilsError):
-    """For errors that can be definitely blamed on the setup script,
-    such as invalid keyword arguments to 'setup()'."""
-    pass
-
-class DistutilsPlatformError (DistutilsError):
-    """We don't know how to do something on the current platform (but
-    we do know how to do it on some platform) -- eg. trying to compile
-    C files on a platform not supported by a CCompiler subclass."""
-    pass
-
-class DistutilsExecError (DistutilsError):
-    """Any problems executing an external program (such as the C
-    compiler, when compiling C files)."""
-    pass
-
-class DistutilsInternalError (DistutilsError):
-    """Internal inconsistencies or impossibilities (obviously, this
-    should never be seen if the code is working!)."""
-    pass
-
-class DistutilsTemplateError (DistutilsError):
-    """Syntax error in a file list template."""
-
-class DistutilsByteCompileError(DistutilsError):
-    """Byte compile error."""
-
-# Exception classes used by the CCompiler implementation classes
-class CCompilerError (Exception):
-    """Some compile/link operation failed."""
-
-class PreprocessError (CCompilerError):
-    """Failure to preprocess one or more C/C++ files."""
-
-class CompileError (CCompilerError):
-    """Failure to compile one or more C/C++ source files."""
-
-class LibError (CCompilerError):
-    """Failure to create a static library from one or more C/C++ object
-    files."""
-
-class LinkError (CCompilerError):
-    """Failure to link one or more C/C++ object files into an executable
-    or shared library file."""
-
-class UnknownFileError (CCompilerError):
-    """Attempt to process an unknown file type."""
diff --git a/contrib/tools/python3/src/Lib/distutils/extension.py b/contrib/tools/python3/src/Lib/distutils/extension.py
deleted file mode 100644
index e85032ece8..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/extension.py
+++ /dev/null
@@ -1,241 +0,0 @@
-"""distutils.extension
-
-Provides the Extension class, used to describe C/C++ extension
-modules in setup scripts."""
-
-import os
-import re
-import warnings
-
-# This class is really only used by the "build_ext" command, so it might
-# make sense to put it in distutils.command.build_ext.  However, that
-# module is already big enough, and I want to make this class a bit more
-# complex to simplify some common cases ("foo" module in "foo.c") and do
-# better error-checking ("foo.c" actually exists).
-#
-# Also, putting this in build_ext.py means every setup script would have to
-# import that large-ish module (indirectly, through distutils.core) in
-# order to do anything.
-
-class Extension:
-    """Just a collection of attributes that describes an extension
-    module and everything needed to build it (hopefully in a portable
-    way, but there are hooks that let you be as unportable as you need).
-
-    Instance attributes:
-      name : string
-        the full name of the extension, including any packages -- ie.
-        *not* a filename or pathname, but Python dotted name
-      sources : [string]
-        list of source filenames, relative to the distribution root
-        (where the setup script lives), in Unix form (slash-separated)
-        for portability.  Source files may be C, C++, SWIG (.i),
-        platform-specific resource files, or whatever else is recognized
-        by the "build_ext" command as source for a Python extension.
-      include_dirs : [string]
-        list of directories to search for C/C++ header files (in Unix
-        form for portability)
-      define_macros : [(name : string, value : string|None)]
-        list of macros to define; each macro is defined using a 2-tuple,
-        where 'value' is either the string to define it to or None to
-        define it without a particular value (equivalent of "#define
-        FOO" in source or -DFOO on Unix C compiler command line)
-      undef_macros : [string]
-        list of macros to undefine explicitly
-      library_dirs : [string]
-        list of directories to search for C/C++ libraries at link time
-      libraries : [string]
-        list of library names (not filenames or paths) to link against
-      runtime_library_dirs : [string]
-        list of directories to search for C/C++ libraries at run time
-        (for shared extensions, this is when the extension is loaded)
-      extra_objects : [string]
-        list of extra files to link with (eg. object files not implied
-        by 'sources', static library that must be explicitly specified,
-        binary resource files, etc.)
-      extra_compile_args : [string]
-        any extra platform- and compiler-specific information to use
-        when compiling the source files in 'sources'.  For platforms and
-        compilers where "command line" makes sense, this is typically a
-        list of command-line arguments, but for other platforms it could
-        be anything.
-      extra_link_args : [string]
-        any extra platform- and compiler-specific information to use
-        when linking object files together to create the extension (or
-        to create a new static Python interpreter).  Similar
-        interpretation as for 'extra_compile_args'.
-      export_symbols : [string]
-        list of symbols to be exported from a shared extension.  Not
-        used on all platforms, and not generally necessary for Python
-        extensions, which typically export exactly one symbol: "init" +
-        extension_name.
-      swig_opts : [string]
-        any extra options to pass to SWIG if a source file has the .i
-        extension.
-      depends : [string]
-        list of files that the extension depends on
-      language : string
-        extension language (i.e. "c", "c++", "objc"). Will be detected
-        from the source extensions if not provided.
-      optional : boolean
-        specifies that a build failure in the extension should not abort the
-        build process, but simply not install the failing extension.
-    """
-
-    # When adding arguments to this constructor, be sure to update
-    # setup_keywords in core.py.
-    def __init__(self, name, sources,
-                  include_dirs=None,
-                  define_macros=None,
-                  undef_macros=None,
-                  library_dirs=None,
-                  libraries=None,
-                  runtime_library_dirs=None,
-                  extra_objects=None,
-                  extra_compile_args=None,
-                  extra_link_args=None,
-                  export_symbols=None,
-                  swig_opts = None,
-                  depends=None,
-                  language=None,
-                  optional=None,
-                  **kw                      # To catch unknown keywords
-                 ):
-        if not isinstance(name, str):
-            raise AssertionError("'name' must be a string")
-        if not (isinstance(sources, list) and
-                all(isinstance(v, str) for v in sources)):
-            raise AssertionError("'sources' must be a list of strings")
-
-        self.name = name
-        self.sources = sources
-        self.include_dirs = include_dirs or []
-        self.define_macros = define_macros or []
-        self.undef_macros = undef_macros or []
-        self.library_dirs = library_dirs or []
-        self.libraries = libraries or []
-        self.runtime_library_dirs = runtime_library_dirs or []
-        self.extra_objects = extra_objects or []
-        self.extra_compile_args = extra_compile_args or []
-        self.extra_link_args = extra_link_args or []
-        self.export_symbols = export_symbols or []
-        self.swig_opts = swig_opts or []
-        self.depends = depends or []
-        self.language = language
-        self.optional = optional
-
-        # If there are unknown keyword options, warn about them
-        if len(kw) > 0:
-            options = [repr(option) for option in kw]
-            options = ', '.join(sorted(options))
-            msg = "Unknown Extension options: %s" % options
-            warnings.warn(msg)
-
-    def __repr__(self):
-        return '<%s.%s(%r) at %#x>' % (
-            self.__class__.__module__,
-            self.__class__.__qualname__,
-            self.name,
-            id(self))
-
-
-def read_setup_file(filename):
-    """Reads a Setup file and returns Extension instances."""
-    from distutils.sysconfig import (parse_makefile, expand_makefile_vars,
-                                     _variable_rx)
-
-    from distutils.text_file import TextFile
-    from distutils.util import split_quoted
-
-    # First pass over the file to gather "VAR = VALUE" assignments.
-    vars = parse_makefile(filename)
-
-    # Second pass to gobble up the real content: lines of the form
-    #   <module> ... [<sourcefile> ...] [<cpparg> ...] [<library> ...]
-    file = TextFile(filename,
-                    strip_comments=1, skip_blanks=1, join_lines=1,
-                    lstrip_ws=1, rstrip_ws=1)
-    try:
-        extensions = []
-
-        while True:
-            line = file.readline()
-            if line is None:                # eof
-                break
-            if re.match(_variable_rx, line):    # VAR=VALUE, handled in first pass
-                continue
-
-            if line[0] == line[-1] == "*":
-                file.warn("'%s' lines not handled yet" % line)
-                continue
-
-            line = expand_makefile_vars(line, vars)
-            words = split_quoted(line)
-
-            # NB. this parses a slightly different syntax than the old
-            # makesetup script: here, there must be exactly one extension per
-            # line, and it must be the first word of the line.  I have no idea
-            # why the old syntax supported multiple extensions per line, as
-            # they all wind up being the same.
-
-            module = words[0]
-            ext = Extension(module, [])
-            append_next_word = None
-
-            for word in words[1:]:
-                if append_next_word is not None:
-                    append_next_word.append(word)
-                    append_next_word = None
-                    continue
-
-                suffix = os.path.splitext(word)[1]
-                switch = word[0:2] ; value = word[2:]
-
-                if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
-                    # hmm, should we do something about C vs. C++ sources?
-                    # or leave it up to the CCompiler implementation to
-                    # worry about?
-                    ext.sources.append(word)
-                elif switch == "-I":
-                    ext.include_dirs.append(value)
-                elif switch == "-D":
-                    equals = value.find("=")
-                    if equals == -1:        # bare "-DFOO" -- no value
-                        ext.define_macros.append((value, None))
-                    else:                   # "-DFOO=blah"
-                        ext.define_macros.append((value[0:equals],
-                                                  value[equals+2:]))
-                elif switch == "-U":
-                    ext.undef_macros.append(value)
-                elif switch == "-C":        # only here 'cause makesetup has it!
-                    ext.extra_compile_args.append(word)
-                elif switch == "-l":
-                    ext.libraries.append(value)
-                elif switch == "-L":
-                    ext.library_dirs.append(value)
-                elif switch == "-R":
-                    ext.runtime_library_dirs.append(value)
-                elif word == "-rpath":
-                    append_next_word = ext.runtime_library_dirs
-                elif word == "-Xlinker":
-                    append_next_word = ext.extra_link_args
-                elif word == "-Xcompiler":
-                    append_next_word = ext.extra_compile_args
-                elif switch == "-u":
-                    ext.extra_link_args.append(word)
-                    if not value:
-                        append_next_word = ext.extra_link_args
-                elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
-                    # NB. a really faithful emulation of makesetup would
-                    # append a .o file to extra_objects only if it
-                    # had a slash in it; otherwise, it would s/.o/.c/
-                    # and append it to sources.  Hmmmm.
-                    ext.extra_objects.append(word)
-                else:
-                    file.warn("unrecognized argument '%s'" % word)
-
-            extensions.append(ext)
-    finally:
-        file.close()
-
-    return extensions
diff --git a/contrib/tools/python3/src/Lib/distutils/fancy_getopt.py b/contrib/tools/python3/src/Lib/distutils/fancy_getopt.py
deleted file mode 100644
index 7d170dd277..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/fancy_getopt.py
+++ /dev/null
@@ -1,457 +0,0 @@
-"""distutils.fancy_getopt
-
-Wrapper around the standard getopt module that provides the following
-additional features:
-  * short and long options are tied together
-  * options have help strings, so fancy_getopt could potentially
-    create a complete usage summary
-  * options set attributes of a passed-in object
-"""
-
-import sys, string, re
-import getopt
-from distutils.errors import *
-
-# Much like command_re in distutils.core, this is close to but not quite
-# the same as a Python NAME -- except, in the spirit of most GNU
-# utilities, we use '-' in place of '_'.  (The spirit of LISP lives on!)
-# The similarities to NAME are again not a coincidence...
-longopt_pat = r'[a-zA-Z](?:[a-zA-Z0-9-]*)'
-longopt_re = re.compile(r'^%s$' % longopt_pat)
-
-# For recognizing "negative alias" options, eg. "quiet=!verbose"
-neg_alias_re = re.compile("^(%s)=!(%s)$" % (longopt_pat, longopt_pat))
-
-# This is used to translate long options to legitimate Python identifiers
-# (for use as attributes of some object).
-longopt_xlate = str.maketrans('-', '_')
-
-class FancyGetopt:
-    """Wrapper around the standard 'getopt()' module that provides some
-    handy extra functionality:
-      * short and long options are tied together
-      * options have help strings, and help text can be assembled
-        from them
-      * options set attributes of a passed-in object
-      * boolean options can have "negative aliases" -- eg. if
-        --quiet is the "negative alias" of --verbose, then "--quiet"
-        on the command line sets 'verbose' to false
-    """
-
-    def __init__(self, option_table=None):
-        # The option table is (currently) a list of tuples.  The
-        # tuples may have 3 or four values:
-        #   (long_option, short_option, help_string [, repeatable])
-        # if an option takes an argument, its long_option should have '='
-        # appended; short_option should just be a single character, no ':'
-        # in any case.  If a long_option doesn't have a corresponding
-        # short_option, short_option should be None.  All option tuples
-        # must have long options.
-        self.option_table = option_table
-
-        # 'option_index' maps long option names to entries in the option
-        # table (ie. those 3-tuples).
-        self.option_index = {}
-        if self.option_table:
-            self._build_index()
-
-        # 'alias' records (duh) alias options; {'foo': 'bar'} means
-        # --foo is an alias for --bar
-        self.alias = {}
-
-        # 'negative_alias' keeps track of options that are the boolean
-        # opposite of some other option
-        self.negative_alias = {}
-
-        # These keep track of the information in the option table.  We
-        # don't actually populate these structures until we're ready to
-        # parse the command-line, since the 'option_table' passed in here
-        # isn't necessarily the final word.
-        self.short_opts = []
-        self.long_opts = []
-        self.short2long = {}
-        self.attr_name = {}
-        self.takes_arg = {}
-
-        # And 'option_order' is filled up in 'getopt()'; it records the
-        # original order of options (and their values) on the command-line,
-        # but expands short options, converts aliases, etc.
-        self.option_order = []
-
-    def _build_index(self):
-        self.option_index.clear()
-        for option in self.option_table:
-            self.option_index[option[0]] = option
-
-    def set_option_table(self, option_table):
-        self.option_table = option_table
-        self._build_index()
-
-    def add_option(self, long_option, short_option=None, help_string=None):
-        if long_option in self.option_index:
-            raise DistutilsGetoptError(
-                  "option conflict: already an option '%s'" % long_option)
-        else:
-            option = (long_option, short_option, help_string)
-            self.option_table.append(option)
-            self.option_index[long_option] = option
-
-    def has_option(self, long_option):
-        """Return true if the option table for this parser has an
-        option with long name 'long_option'."""
-        return long_option in self.option_index
-
-    def get_attr_name(self, long_option):
-        """Translate long option name 'long_option' to the form it
-        has as an attribute of some object: ie., translate hyphens
-        to underscores."""
-        return long_option.translate(longopt_xlate)
-
-    def _check_alias_dict(self, aliases, what):
-        assert isinstance(aliases, dict)
-        for (alias, opt) in aliases.items():
-            if alias not in self.option_index:
-                raise DistutilsGetoptError(("invalid %s '%s': "
-                       "option '%s' not defined") % (what, alias, alias))
-            if opt not in self.option_index:
-                raise DistutilsGetoptError(("invalid %s '%s': "
-                       "aliased option '%s' not defined") % (what, alias, opt))
-
-    def set_aliases(self, alias):
-        """Set the aliases for this option parser."""
-        self._check_alias_dict(alias, "alias")
-        self.alias = alias
-
-    def set_negative_aliases(self, negative_alias):
-        """Set the negative aliases for this option parser.
-        'negative_alias' should be a dictionary mapping option names to
-        option names, both the key and value must already be defined
-        in the option table."""
-        self._check_alias_dict(negative_alias, "negative alias")
-        self.negative_alias = negative_alias
-
-    def _grok_option_table(self):
-        """Populate the various data structures that keep tabs on the
-        option table.  Called by 'getopt()' before it can do anything
-        worthwhile.
-        """
-        self.long_opts = []
-        self.short_opts = []
-        self.short2long.clear()
-        self.repeat = {}
-
-        for option in self.option_table:
-            if len(option) == 3:
-                long, short, help = option
-                repeat = 0
-            elif len(option) == 4:
-                long, short, help, repeat = option
-            else:
-                # the option table is part of the code, so simply
-                # assert that it is correct
-                raise ValueError("invalid option tuple: %r" % (option,))
-
-            # Type- and value-check the option names
-            if not isinstance(long, str) or len(long) < 2:
-                raise DistutilsGetoptError(("invalid long option '%s': "
-                       "must be a string of length >= 2") % long)
-
-            if (not ((short is None) or
-                     (isinstance(short, str) and len(short) == 1))):
-                raise DistutilsGetoptError("invalid short option '%s': "
-                       "must a single character or None" % short)
-
-            self.repeat[long] = repeat
-            self.long_opts.append(long)
-
-            if long[-1] == '=':             # option takes an argument?
-                if short: short = short + ':'
-                long = long[0:-1]
-                self.takes_arg[long] = 1
-            else:
-                # Is option is a "negative alias" for some other option (eg.
-                # "quiet" == "!verbose")?
-                alias_to = self.negative_alias.get(long)
-                if alias_to is not None:
-                    if self.takes_arg[alias_to]:
-                        raise DistutilsGetoptError(
-                              "invalid negative alias '%s': "
-                              "aliased option '%s' takes a value"
-                              % (long, alias_to))
-
-                    self.long_opts[-1] = long # XXX redundant?!
-                self.takes_arg[long] = 0
-
-            # If this is an alias option, make sure its "takes arg" flag is
-            # the same as the option it's aliased to.
-            alias_to = self.alias.get(long)
-            if alias_to is not None:
-                if self.takes_arg[long] != self.takes_arg[alias_to]:
-                    raise DistutilsGetoptError(
-                          "invalid alias '%s': inconsistent with "
-                          "aliased option '%s' (one of them takes a value, "
-                          "the other doesn't"
-                          % (long, alias_to))
-
-            # Now enforce some bondage on the long option name, so we can
-            # later translate it to an attribute name on some object.  Have
-            # to do this a bit late to make sure we've removed any trailing
-            # '='.
-            if not longopt_re.match(long):
-                raise DistutilsGetoptError(
-                       "invalid long option name '%s' "
-                       "(must be letters, numbers, hyphens only" % long)
-
-            self.attr_name[long] = self.get_attr_name(long)
-            if short:
-                self.short_opts.append(short)
-                self.short2long[short[0]] = long
-
-    def getopt(self, args=None, object=None):
-        """Parse command-line options in args. Store as attributes on object.
-
-        If 'args' is None or not supplied, uses 'sys.argv[1:]'.  If
-        'object' is None or not supplied, creates a new OptionDummy
-        object, stores option values there, and returns a tuple (args,
-        object).  If 'object' is supplied, it is modified in place and
-        'getopt()' just returns 'args'; in both cases, the returned
-        'args' is a modified copy of the passed-in 'args' list, which
-        is left untouched.
-        """
-        if args is None:
-            args = sys.argv[1:]
-        if object is None:
-            object = OptionDummy()
-            created_object = True
-        else:
-            created_object = False
-
-        self._grok_option_table()
-
-        short_opts = ' '.join(self.short_opts)
-        try:
-            opts, args = getopt.getopt(args, short_opts, self.long_opts)
-        except getopt.error as msg:
-            raise DistutilsArgError(msg)
-
-        for opt, val in opts:
-            if len(opt) == 2 and opt[0] == '-': # it's a short option
-                opt = self.short2long[opt[1]]
-            else:
-                assert len(opt) > 2 and opt[:2] == '--'
-                opt = opt[2:]
-
-            alias = self.alias.get(opt)
-            if alias:
-                opt = alias
-
-            if not self.takes_arg[opt]:     # boolean option?
-                assert val == '', "boolean option can't have value"
-                alias = self.negative_alias.get(opt)
-                if alias:
-                    opt = alias
-                    val = 0
-                else:
-                    val = 1
-
-            attr = self.attr_name[opt]
-            # The only repeating option at the moment is 'verbose'.
-            # It has a negative option -q quiet, which should set verbose = 0.
-            if val and self.repeat.get(attr) is not None:
-                val = getattr(object, attr, 0) + 1
-            setattr(object, attr, val)
-            self.option_order.append((opt, val))
-
-        # for opts
-        if created_object:
-            return args, object
-        else:
-            return args
-
-    def get_option_order(self):
-        """Returns the list of (option, value) tuples processed by the
-        previous run of 'getopt()'.  Raises RuntimeError if
-        'getopt()' hasn't been called yet.
-        """
-        if self.option_order is None:
-            raise RuntimeError("'getopt()' hasn't been called yet")
-        else:
-            return self.option_order
-
-    def generate_help(self, header=None):
-        """Generate help text (a list of strings, one per suggested line of
-        output) from the option table for this FancyGetopt object.
-        """
-        # Blithely assume the option table is good: probably wouldn't call
-        # 'generate_help()' unless you've already called 'getopt()'.
-
-        # First pass: determine maximum length of long option names
-        max_opt = 0
-        for option in self.option_table:
-            long = option[0]
-            short = option[1]
-            l = len(long)
-            if long[-1] == '=':
-                l = l - 1
-            if short is not None:
-                l = l + 5                   # " (-x)" where short == 'x'
-            if l > max_opt:
-                max_opt = l
-
-        opt_width = max_opt + 2 + 2 + 2     # room for indent + dashes + gutter
-
-        # Typical help block looks like this:
-        #   --foo       controls foonabulation
-        # Help block for longest option looks like this:
-        #   --flimflam  set the flim-flam level
-        # and with wrapped text:
-        #   --flimflam  set the flim-flam level (must be between
-        #               0 and 100, except on Tuesdays)
-        # Options with short names will have the short name shown (but
-        # it doesn't contribute to max_opt):
-        #   --foo (-f)  controls foonabulation
-        # If adding the short option would make the left column too wide,
-        # we push the explanation off to the next line
-        #   --flimflam (-l)
-        #               set the flim-flam level
-        # Important parameters:
-        #   - 2 spaces before option block start lines
-        #   - 2 dashes for each long option name
-        #   - min. 2 spaces between option and explanation (gutter)
-        #   - 5 characters (incl. space) for short option name
-
-        # Now generate lines of help text.  (If 80 columns were good enough
-        # for Jesus, then 78 columns are good enough for me!)
-        line_width = 78
-        text_width = line_width - opt_width
-        big_indent = ' ' * opt_width
-        if header:
-            lines = [header]
-        else:
-            lines = ['Option summary:']
-
-        for option in self.option_table:
-            long, short, help = option[:3]
-            text = wrap_text(help, text_width)
-            if long[-1] == '=':
-                long = long[0:-1]
-
-            # Case 1: no short option at all (makes life easy)
-            if short is None:
-                if text:
-                    lines.append("  --%-*s  %s" % (max_opt, long, text[0]))
-                else:
-                    lines.append("  --%-*s  " % (max_opt, long))
-
-            # Case 2: we have a short option, so we have to include it
-            # just after the long option
-            else:
-                opt_names = "%s (-%s)" % (long, short)
-                if text:
-                    lines.append("  --%-*s  %s" %
-                                 (max_opt, opt_names, text[0]))
-                else:
-                    lines.append("  --%-*s" % opt_names)
-
-            for l in text[1:]:
-                lines.append(big_indent + l)
-        return lines
-
-    def print_help(self, header=None, file=None):
-        if file is None:
-            file = sys.stdout
-        for line in self.generate_help(header):
-            file.write(line + "\n")
-
-
-def fancy_getopt(options, negative_opt, object, args):
-    parser = FancyGetopt(options)
-    parser.set_negative_aliases(negative_opt)
-    return parser.getopt(args, object)
-
-
-WS_TRANS = {ord(_wschar) : ' ' for _wschar in string.whitespace}
-
-def wrap_text(text, width):
-    """wrap_text(text : string, width : int) -> [string]
-
-    Split 'text' into multiple lines of no more than 'width' characters
-    each, and return the list of strings that results.
-    """
-    if text is None:
-        return []
-    if len(text) <= width:
-        return [text]
-
-    text = text.expandtabs()
-    text = text.translate(WS_TRANS)
-    chunks = re.split(r'( +|-+)', text)
-    chunks = [ch for ch in chunks if ch] # ' - ' results in empty strings
-    lines = []
-
-    while chunks:
-        cur_line = []                   # list of chunks (to-be-joined)
-        cur_len = 0                     # length of current line
-
-        while chunks:
-            l = len(chunks[0])
-            if cur_len + l <= width:    # can squeeze (at least) this chunk in
-                cur_line.append(chunks[0])
-                del chunks[0]
-                cur_len = cur_len + l
-            else:                       # this line is full
-                # drop last chunk if all space
-                if cur_line and cur_line[-1][0] == ' ':
-                    del cur_line[-1]
-                break
-
-        if chunks:                      # any chunks left to process?
-            # if the current line is still empty, then we had a single
-            # chunk that's too big too fit on a line -- so we break
-            # down and break it up at the line width
-            if cur_len == 0:
-                cur_line.append(chunks[0][0:width])
-                chunks[0] = chunks[0][width:]
-
-            # all-whitespace chunks at the end of a line can be discarded
-            # (and we know from the re.split above that if a chunk has
-            # *any* whitespace, it is *all* whitespace)
-            if chunks[0][0] == ' ':
-                del chunks[0]
-
-        # and store this line in the list-of-all-lines -- as a single
-        # string, of course!
-        lines.append(''.join(cur_line))
-
-    return lines
-
-
-def translate_longopt(opt):
-    """Convert a long option name to a valid Python identifier by
-    changing "-" to "_".
-    """
-    return opt.translate(longopt_xlate)
-
-
-class OptionDummy:
-    """Dummy class just used as a place to hold command-line option
-    values as instance attributes."""
-
-    def __init__(self, options=[]):
-        """Create a new OptionDummy instance.  The attributes listed in
-        'options' will be initialized to None."""
-        for opt in options:
-            setattr(self, opt, None)
-
-
-if __name__ == "__main__":
-    text = """\
-Tra-la-la, supercalifragilisticexpialidocious.
-How *do* you spell that odd word, anyways?
-(Someone ask Mary -- she'll know [or she'll
-say, "How should I know?"].)"""
-
-    for w in (10, 20, 30, 40):
-        print("width: %d" % w)
-        print("\n".join(wrap_text(text, w)))
-        print()
diff --git a/contrib/tools/python3/src/Lib/distutils/file_util.py b/contrib/tools/python3/src/Lib/distutils/file_util.py
deleted file mode 100644
index b3fee35a6c..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/file_util.py
+++ /dev/null
@@ -1,238 +0,0 @@
-"""distutils.file_util
-
-Utility functions for operating on single files.
-"""
-
-import os
-from distutils.errors import DistutilsFileError
-from distutils import log
-
-# for generating verbose output in 'copy_file()'
-_copy_action = { None:   'copying',
-                 'hard': 'hard linking',
-                 'sym':  'symbolically linking' }
-
-
-def _copy_file_contents(src, dst, buffer_size=16*1024):
-    """Copy the file 'src' to 'dst'; both must be filenames.  Any error
-    opening either file, reading from 'src', or writing to 'dst', raises
-    DistutilsFileError.  Data is read/written in chunks of 'buffer_size'
-    bytes (default 16k).  No attempt is made to handle anything apart from
-    regular files.
-    """
-    # Stolen from shutil module in the standard library, but with
-    # custom error-handling added.
-    fsrc = None
-    fdst = None
-    try:
-        try:
-            fsrc = open(src, 'rb')
-        except OSError as e:
-            raise DistutilsFileError("could not open '%s': %s" % (src, e.strerror))
-
-        if os.path.exists(dst):
-            try:
-                os.unlink(dst)
-            except OSError as e:
-                raise DistutilsFileError(
-                      "could not delete '%s': %s" % (dst, e.strerror))
-
-        try:
-            fdst = open(dst, 'wb')
-        except OSError as e:
-            raise DistutilsFileError(
-                  "could not create '%s': %s" % (dst, e.strerror))
-
-        while True:
-            try:
-                buf = fsrc.read(buffer_size)
-            except OSError as e:
-                raise DistutilsFileError(
-                      "could not read from '%s': %s" % (src, e.strerror))
-
-            if not buf:
-                break
-
-            try:
-                fdst.write(buf)
-            except OSError as e:
-                raise DistutilsFileError(
-                      "could not write to '%s': %s" % (dst, e.strerror))
-    finally:
-        if fdst:
-            fdst.close()
-        if fsrc:
-            fsrc.close()
-
-def copy_file(src, dst, preserve_mode=1, preserve_times=1, update=0,
-              link=None, verbose=1, dry_run=0):
-    """Copy a file 'src' to 'dst'.  If 'dst' is a directory, then 'src' is
-    copied there with the same name; otherwise, it must be a filename.  (If
-    the file exists, it will be ruthlessly clobbered.)  If 'preserve_mode'
-    is true (the default), the file's mode (type and permission bits, or
-    whatever is analogous on the current platform) is copied.  If
-    'preserve_times' is true (the default), the last-modified and
-    last-access times are copied as well.  If 'update' is true, 'src' will
-    only be copied if 'dst' does not exist, or if 'dst' does exist but is
-    older than 'src'.
-
-    'link' allows you to make hard links (os.link) or symbolic links
-    (os.symlink) instead of copying: set it to "hard" or "sym"; if it is
-    None (the default), files are copied.  Don't set 'link' on systems that
-    don't support it: 'copy_file()' doesn't check if hard or symbolic
-    linking is available. If hardlink fails, falls back to
-    _copy_file_contents().
-
-    Under Mac OS, uses the native file copy function in macostools; on
-    other systems, uses '_copy_file_contents()' to copy file contents.
-
-    Return a tuple (dest_name, copied): 'dest_name' is the actual name of
-    the output file, and 'copied' is true if the file was copied (or would
-    have been copied, if 'dry_run' true).
-    """
-    # XXX if the destination file already exists, we clobber it if
-    # copying, but blow up if linking.  Hmmm.  And I don't know what
-    # macostools.copyfile() does.  Should definitely be consistent, and
-    # should probably blow up if destination exists and we would be
-    # changing it (ie. it's not already a hard/soft link to src OR
-    # (not update) and (src newer than dst).
-
-    from distutils.dep_util import newer
-    from stat import ST_ATIME, ST_MTIME, ST_MODE, S_IMODE
-
-    if not os.path.isfile(src):
-        raise DistutilsFileError(
-              "can't copy '%s': doesn't exist or not a regular file" % src)
-
-    if os.path.isdir(dst):
-        dir = dst
-        dst = os.path.join(dst, os.path.basename(src))
-    else:
-        dir = os.path.dirname(dst)
-
-    if update and not newer(src, dst):
-        if verbose >= 1:
-            log.debug("not copying %s (output up-to-date)", src)
-        return (dst, 0)
-
-    try:
-        action = _copy_action[link]
-    except KeyError:
-        raise ValueError("invalid value '%s' for 'link' argument" % link)
-
-    if verbose >= 1:
-        if os.path.basename(dst) == os.path.basename(src):
-            log.info("%s %s -> %s", action, src, dir)
-        else:
-            log.info("%s %s -> %s", action, src, dst)
-
-    if dry_run:
-        return (dst, 1)
-
-    # If linking (hard or symbolic), use the appropriate system call
-    # (Unix only, of course, but that's the caller's responsibility)
-    elif link == 'hard':
-        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
-            try:
-                os.link(src, dst)
-                return (dst, 1)
-            except OSError:
-                # If hard linking fails, fall back on copying file
-                # (some special filesystems don't support hard linking
-                #  even under Unix, see issue #8876).
-                pass
-    elif link == 'sym':
-        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
-            os.symlink(src, dst)
-            return (dst, 1)
-
-    # Otherwise (non-Mac, not linking), copy the file contents and
-    # (optionally) copy the times and mode.
-    _copy_file_contents(src, dst)
-    if preserve_mode or preserve_times:
-        st = os.stat(src)
-
-        # According to David Ascher <da@ski.org>, utime() should be done
-        # before chmod() (at least under NT).
-        if preserve_times:
-            os.utime(dst, (st[ST_ATIME], st[ST_MTIME]))
-        if preserve_mode:
-            os.chmod(dst, S_IMODE(st[ST_MODE]))
-
-    return (dst, 1)
-
-
-# XXX I suspect this is Unix-specific -- need porting help!
-def move_file (src, dst,
-               verbose=1,
-               dry_run=0):
-
-    """Move a file 'src' to 'dst'.  If 'dst' is a directory, the file will
-    be moved into it with the same name; otherwise, 'src' is just renamed
-    to 'dst'.  Return the new full name of the file.
-
-    Handles cross-device moves on Unix using 'copy_file()'.  What about
-    other systems???
-    """
-    from os.path import exists, isfile, isdir, basename, dirname
-    import errno
-
-    if verbose >= 1:
-        log.info("moving %s -> %s", src, dst)
-
-    if dry_run:
-        return dst
-
-    if not isfile(src):
-        raise DistutilsFileError("can't move '%s': not a regular file" % src)
-
-    if isdir(dst):
-        dst = os.path.join(dst, basename(src))
-    elif exists(dst):
-        raise DistutilsFileError(
-              "can't move '%s': destination '%s' already exists" %
-              (src, dst))
-
-    if not isdir(dirname(dst)):
-        raise DistutilsFileError(
-              "can't move '%s': destination '%s' not a valid path" %
-              (src, dst))
-
-    copy_it = False
-    try:
-        os.rename(src, dst)
-    except OSError as e:
-        (num, msg) = e.args
-        if num == errno.EXDEV:
-            copy_it = True
-        else:
-            raise DistutilsFileError(
-                  "couldn't move '%s' to '%s': %s" % (src, dst, msg))
-
-    if copy_it:
-        copy_file(src, dst, verbose=verbose)
-        try:
-            os.unlink(src)
-        except OSError as e:
-            (num, msg) = e.args
-            try:
-                os.unlink(dst)
-            except OSError:
-                pass
-            raise DistutilsFileError(
-                  "couldn't move '%s' to '%s' by copy/delete: "
-                  "delete '%s' failed: %s"
-                  % (src, dst, src, msg))
-    return dst
-
-
-def write_file (filename, contents):
-    """Create a file with the specified name and write 'contents' (a
-    sequence of strings without line terminators) to it.
-    """
-    f = open(filename, "w")
-    try:
-        for line in contents:
-            f.write(line + "\n")
-    finally:
-        f.close()
diff --git a/contrib/tools/python3/src/Lib/distutils/filelist.py b/contrib/tools/python3/src/Lib/distutils/filelist.py
deleted file mode 100644
index c92d5fdba3..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/filelist.py
+++ /dev/null
@@ -1,327 +0,0 @@
-"""distutils.filelist
-
-Provides the FileList class, used for poking about the filesystem
-and building lists of files.
-"""
-
-import os, re
-import fnmatch
-import functools
-from distutils.util import convert_path
-from distutils.errors import DistutilsTemplateError, DistutilsInternalError
-from distutils import log
-
-class FileList:
-    """A list of files built by on exploring the filesystem and filtered by
-    applying various patterns to what we find there.
-
-    Instance attributes:
-      dir
-        directory from which files will be taken -- only used if
-        'allfiles' not supplied to constructor
-      files
-        list of filenames currently being built/filtered/manipulated
-      allfiles
-        complete list of files under consideration (ie. without any
-        filtering applied)
-    """
-
-    def __init__(self, warn=None, debug_print=None):
-        # ignore argument to FileList, but keep them for backwards
-        # compatibility
-        self.allfiles = None
-        self.files = []
-
-    def set_allfiles(self, allfiles):
-        self.allfiles = allfiles
-
-    def findall(self, dir=os.curdir):
-        self.allfiles = findall(dir)
-
-    def debug_print(self, msg):
-        """Print 'msg' to stdout if the global DEBUG (taken from the
-        DISTUTILS_DEBUG environment variable) flag is true.
-        """
-        from distutils.debug import DEBUG
-        if DEBUG:
-            print(msg)
-
-    # -- List-like methods ---------------------------------------------
-
-    def append(self, item):
-        self.files.append(item)
-
-    def extend(self, items):
-        self.files.extend(items)
-
-    def sort(self):
-        # Not a strict lexical sort!
-        sortable_files = sorted(map(os.path.split, self.files))
-        self.files = []
-        for sort_tuple in sortable_files:
-            self.files.append(os.path.join(*sort_tuple))
-
-
-    # -- Other miscellaneous utility methods ---------------------------
-
-    def remove_duplicates(self):
-        # Assumes list has been sorted!
-        for i in range(len(self.files) - 1, 0, -1):
-            if self.files[i] == self.files[i - 1]:
-                del self.files[i]
-
-
-    # -- "File template" methods ---------------------------------------
-
-    def _parse_template_line(self, line):
-        words = line.split()
-        action = words[0]
-
-        patterns = dir = dir_pattern = None
-
-        if action in ('include', 'exclude',
-                      'global-include', 'global-exclude'):
-            if len(words) < 2:
-                raise DistutilsTemplateError(
-                      "'%s' expects <pattern1> <pattern2> ..." % action)
-            patterns = [convert_path(w) for w in words[1:]]
-        elif action in ('recursive-include', 'recursive-exclude'):
-            if len(words) < 3:
-                raise DistutilsTemplateError(
-                      "'%s' expects <dir> <pattern1> <pattern2> ..." % action)
-            dir = convert_path(words[1])
-            patterns = [convert_path(w) for w in words[2:]]
-        elif action in ('graft', 'prune'):
-            if len(words) != 2:
-                raise DistutilsTemplateError(
-                      "'%s' expects a single <dir_pattern>" % action)
-            dir_pattern = convert_path(words[1])
-        else:
-            raise DistutilsTemplateError("unknown action '%s'" % action)
-
-        return (action, patterns, dir, dir_pattern)
-
-    def process_template_line(self, line):
-        # Parse the line: split it up, make sure the right number of words
-        # is there, and return the relevant words.  'action' is always
-        # defined: it's the first word of the line.  Which of the other
-        # three are defined depends on the action; it'll be either
-        # patterns, (dir and patterns), or (dir_pattern).
-        (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
-
-        # OK, now we know that the action is valid and we have the
-        # right number of words on the line for that action -- so we
-        # can proceed with minimal error-checking.
-        if action == 'include':
-            self.debug_print("include " + ' '.join(patterns))
-            for pattern in patterns:
-                if not self.include_pattern(pattern, anchor=1):
-                    log.warn("warning: no files found matching '%s'",
-                             pattern)
-
-        elif action == 'exclude':
-            self.debug_print("exclude " + ' '.join(patterns))
-            for pattern in patterns:
-                if not self.exclude_pattern(pattern, anchor=1):
-                    log.warn(("warning: no previously-included files "
-                              "found matching '%s'"), pattern)
-
-        elif action == 'global-include':
-            self.debug_print("global-include " + ' '.join(patterns))
-            for pattern in patterns:
-                if not self.include_pattern(pattern, anchor=0):
-                    log.warn(("warning: no files found matching '%s' "
-                              "anywhere in distribution"), pattern)
-
-        elif action == 'global-exclude':
-            self.debug_print("global-exclude " + ' '.join(patterns))
-            for pattern in patterns:
-                if not self.exclude_pattern(pattern, anchor=0):
-                    log.warn(("warning: no previously-included files matching "
-                              "'%s' found anywhere in distribution"),
-                             pattern)
-
-        elif action == 'recursive-include':
-            self.debug_print("recursive-include %s %s" %
-                             (dir, ' '.join(patterns)))
-            for pattern in patterns:
-                if not self.include_pattern(pattern, prefix=dir):
-                    log.warn(("warning: no files found matching '%s' "
-                                "under directory '%s'"),
-                             pattern, dir)
-
-        elif action == 'recursive-exclude':
-            self.debug_print("recursive-exclude %s %s" %
-                             (dir, ' '.join(patterns)))
-            for pattern in patterns:
-                if not self.exclude_pattern(pattern, prefix=dir):
-                    log.warn(("warning: no previously-included files matching "
-                              "'%s' found under directory '%s'"),
-                             pattern, dir)
-
-        elif action == 'graft':
-            self.debug_print("graft " + dir_pattern)
-            if not self.include_pattern(None, prefix=dir_pattern):
-                log.warn("warning: no directories found matching '%s'",
-                         dir_pattern)
-
-        elif action == 'prune':
-            self.debug_print("prune " + dir_pattern)
-            if not self.exclude_pattern(None, prefix=dir_pattern):
-                log.warn(("no previously-included directories found "
-                          "matching '%s'"), dir_pattern)
-        else:
-            raise DistutilsInternalError(
-                  "this cannot happen: invalid action '%s'" % action)
-
-
-    # -- Filtering/selection methods -----------------------------------
-
-    def include_pattern(self, pattern, anchor=1, prefix=None, is_regex=0):
-        """Select strings (presumably filenames) from 'self.files' that
-        match 'pattern', a Unix-style wildcard (glob) pattern.  Patterns
-        are not quite the same as implemented by the 'fnmatch' module: '*'
-        and '?'  match non-special characters, where "special" is platform-
-        dependent: slash on Unix; colon, slash, and backslash on
-        DOS/Windows; and colon on Mac OS.
-
-        If 'anchor' is true (the default), then the pattern match is more
-        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
-        'anchor' is false, both of these will match.
-
-        If 'prefix' is supplied, then only filenames starting with 'prefix'
-        (itself a pattern) and ending with 'pattern', with anything in between
-        them, will match.  'anchor' is ignored in this case.
-
-        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
-        'pattern' is assumed to be either a string containing a regex or a
-        regex object -- no translation is done, the regex is just compiled
-        and used as-is.
-
-        Selected strings will be added to self.files.
-
-        Return True if files are found, False otherwise.
-        """
-        # XXX docstring lying about what the special chars are?
-        files_found = False
-        pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
-        self.debug_print("include_pattern: applying regex r'%s'" %
-                         pattern_re.pattern)
-
-        # delayed loading of allfiles list
-        if self.allfiles is None:
-            self.findall()
-
-        for name in self.allfiles:
-            if pattern_re.search(name):
-                self.debug_print(" adding " + name)
-                self.files.append(name)
-                files_found = True
-        return files_found
-
-
-    def exclude_pattern (self, pattern,
-                         anchor=1, prefix=None, is_regex=0):
-        """Remove strings (presumably filenames) from 'files' that match
-        'pattern'.  Other parameters are the same as for
-        'include_pattern()', above.
-        The list 'self.files' is modified in place.
-        Return True if files are found, False otherwise.
-        """
-        files_found = False
-        pattern_re = translate_pattern(pattern, anchor, prefix, is_regex)
-        self.debug_print("exclude_pattern: applying regex r'%s'" %
-                         pattern_re.pattern)
-        for i in range(len(self.files)-1, -1, -1):
-            if pattern_re.search(self.files[i]):
-                self.debug_print(" removing " + self.files[i])
-                del self.files[i]
-                files_found = True
-        return files_found
-
-
-# ----------------------------------------------------------------------
-# Utility functions
-
-def _find_all_simple(path):
-    """
-    Find all files under 'path'
-    """
-    results = (
-        os.path.join(base, file)
-        for base, dirs, files in os.walk(path, followlinks=True)
-        for file in files
-    )
-    return filter(os.path.isfile, results)
-
-
-def findall(dir=os.curdir):
-    """
-    Find all files under 'dir' and return the list of full filenames.
-    Unless dir is '.', return full filenames with dir prepended.
-    """
-    files = _find_all_simple(dir)
-    if dir == os.curdir:
-        make_rel = functools.partial(os.path.relpath, start=dir)
-        files = map(make_rel, files)
-    return list(files)
-
-
-def glob_to_re(pattern):
-    """Translate a shell-like glob pattern to a regular expression; return
-    a string containing the regex.  Differs from 'fnmatch.translate()' in
-    that '*' does not match "special characters" (which are
-    platform-specific).
-    """
-    pattern_re = fnmatch.translate(pattern)
-
-    # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
-    # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
-    # and by extension they shouldn't match such "special characters" under
-    # any OS.  So change all non-escaped dots in the RE to match any
-    # character except the special characters (currently: just os.sep).
-    sep = os.sep
-    if os.sep == '\\':
-        # we're using a regex to manipulate a regex, so we need
-        # to escape the backslash twice
-        sep = r'\\\\'
-    escaped = r'\1[^%s]' % sep
-    pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
-    return pattern_re
-
-
-def translate_pattern(pattern, anchor=1, prefix=None, is_regex=0):
-    """Translate a shell-like wildcard pattern to a compiled regular
-    expression.  Return the compiled regex.  If 'is_regex' true,
-    then 'pattern' is directly compiled to a regex (if it's a string)
-    or just returned as-is (assumes it's a regex object).
-    """
-    if is_regex:
-        if isinstance(pattern, str):
-            return re.compile(pattern)
-        else:
-            return pattern
-
-    # ditch start and end characters
-    start, _, end = glob_to_re('_').partition('_')
-
-    if pattern:
-        pattern_re = glob_to_re(pattern)
-        assert pattern_re.startswith(start) and pattern_re.endswith(end)
-    else:
-        pattern_re = ''
-
-    if prefix is not None:
-        prefix_re = glob_to_re(prefix)
-        assert prefix_re.startswith(start) and prefix_re.endswith(end)
-        prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
-        sep = os.sep
-        if os.sep == '\\':
-            sep = r'\\'
-        pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
-        pattern_re = r'%s\A%s%s.*%s%s' % (start, prefix_re, sep, pattern_re, end)
-    else:                               # no prefix -- respect anchor flag
-        if anchor:
-            pattern_re = r'%s\A%s' % (start, pattern_re[len(start):])
-
-    return re.compile(pattern_re)
diff --git a/contrib/tools/python3/src/Lib/distutils/log.py b/contrib/tools/python3/src/Lib/distutils/log.py
deleted file mode 100644
index 8ef6b28ea2..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/log.py
+++ /dev/null
@@ -1,77 +0,0 @@
-"""A simple log mechanism styled after PEP 282."""
-
-# The class here is styled after PEP 282 so that it could later be
-# replaced with a standard Python logging implementation.
-
-DEBUG = 1
-INFO = 2
-WARN = 3
-ERROR = 4
-FATAL = 5
-
-import sys
-
-class Log:
-
-    def __init__(self, threshold=WARN):
-        self.threshold = threshold
-
-    def _log(self, level, msg, args):
-        if level not in (DEBUG, INFO, WARN, ERROR, FATAL):
-            raise ValueError('%s wrong log level' % str(level))
-
-        if level >= self.threshold:
-            if args:
-                msg = msg % args
-            if level in (WARN, ERROR, FATAL):
-                stream = sys.stderr
-            else:
-                stream = sys.stdout
-            try:
-                stream.write('%s\n' % msg)
-            except UnicodeEncodeError:
-                # emulate backslashreplace error handler
-                encoding = stream.encoding
-                msg = msg.encode(encoding, "backslashreplace").decode(encoding)
-                stream.write('%s\n' % msg)
-            stream.flush()
-
-    def log(self, level, msg, *args):
-        self._log(level, msg, args)
-
-    def debug(self, msg, *args):
-        self._log(DEBUG, msg, args)
-
-    def info(self, msg, *args):
-        self._log(INFO, msg, args)
-
-    def warn(self, msg, *args):
-        self._log(WARN, msg, args)
-
-    def error(self, msg, *args):
-        self._log(ERROR, msg, args)
-
-    def fatal(self, msg, *args):
-        self._log(FATAL, msg, args)
-
-_global_log = Log()
-log = _global_log.log
-debug = _global_log.debug
-info = _global_log.info
-warn = _global_log.warn
-error = _global_log.error
-fatal = _global_log.fatal
-
-def set_threshold(level):
-    # return the old threshold for use from tests
-    old = _global_log.threshold
-    _global_log.threshold = level
-    return old
-
-def set_verbosity(v):
-    if v <= 0:
-        set_threshold(WARN)
-    elif v == 1:
-        set_threshold(INFO)
-    elif v >= 2:
-        set_threshold(DEBUG)
diff --git a/contrib/tools/python3/src/Lib/distutils/msvc9compiler.py b/contrib/tools/python3/src/Lib/distutils/msvc9compiler.py
deleted file mode 100644
index a7976fbe3e..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/msvc9compiler.py
+++ /dev/null
@@ -1,788 +0,0 @@
-"""distutils.msvc9compiler
-
-Contains MSVCCompiler, an implementation of the abstract CCompiler class
-for the Microsoft Visual Studio 2008.
-
-The module is compatible with VS 2005 and VS 2008. You can find legacy support
-for older versions of VS in distutils.msvccompiler.
-"""
-
-# Written by Perry Stoll
-# hacked by Robin Becker and Thomas Heller to do a better job of
-#   finding DevStudio (through the registry)
-# ported to VS2005 and VS 2008 by Christian Heimes
-
-import os
-import subprocess
-import sys
-import re
-
-from distutils.errors import DistutilsExecError, DistutilsPlatformError, \
-                             CompileError, LibError, LinkError
-from distutils.ccompiler import CCompiler, gen_lib_options
-from distutils import log
-from distutils.util import get_platform
-
-import winreg
-
-RegOpenKeyEx = winreg.OpenKeyEx
-RegEnumKey = winreg.EnumKey
-RegEnumValue = winreg.EnumValue
-RegError = winreg.error
-
-HKEYS = (winreg.HKEY_USERS,
-         winreg.HKEY_CURRENT_USER,
-         winreg.HKEY_LOCAL_MACHINE,
-         winreg.HKEY_CLASSES_ROOT)
-
-NATIVE_WIN64 = (sys.platform == 'win32' and sys.maxsize > 2**32)
-if NATIVE_WIN64:
-    # Visual C++ is a 32-bit application, so we need to look in
-    # the corresponding registry branch, if we're running a
-    # 64-bit Python on Win64
-    VS_BASE = r"Software\Wow6432Node\Microsoft\VisualStudio\%0.1f"
-    WINSDK_BASE = r"Software\Wow6432Node\Microsoft\Microsoft SDKs\Windows"
-    NET_BASE = r"Software\Wow6432Node\Microsoft\.NETFramework"
-else:
-    VS_BASE = r"Software\Microsoft\VisualStudio\%0.1f"
-    WINSDK_BASE = r"Software\Microsoft\Microsoft SDKs\Windows"
-    NET_BASE = r"Software\Microsoft\.NETFramework"
-
-# A map keyed by get_platform() return values to values accepted by
-# 'vcvarsall.bat'.  Note a cross-compile may combine these (eg, 'x86_amd64' is
-# the param to cross-compile on x86 targeting amd64.)
-PLAT_TO_VCVARS = {
-    'win32' : 'x86',
-    'win-amd64' : 'amd64',
-}
-
-class Reg:
-    """Helper class to read values from the registry
-    """
-
-    def get_value(cls, path, key):
-        for base in HKEYS:
-            d = cls.read_values(base, path)
-            if d and key in d:
-                return d[key]
-        raise KeyError(key)
-    get_value = classmethod(get_value)
-
-    def read_keys(cls, base, key):
-        """Return list of registry keys."""
-        try:
-            handle = RegOpenKeyEx(base, key)
-        except RegError:
-            return None
-        L = []
-        i = 0
-        while True:
-            try:
-                k = RegEnumKey(handle, i)
-            except RegError:
-                break
-            L.append(k)
-            i += 1
-        return L
-    read_keys = classmethod(read_keys)
-
-    def read_values(cls, base, key):
-        """Return dict of registry keys and values.
-
-        All names are converted to lowercase.
-        """
-        try:
-            handle = RegOpenKeyEx(base, key)
-        except RegError:
-            return None
-        d = {}
-        i = 0
-        while True:
-            try:
-                name, value, type = RegEnumValue(handle, i)
-            except RegError:
-                break
-            name = name.lower()
-            d[cls.convert_mbcs(name)] = cls.convert_mbcs(value)
-            i += 1
-        return d
-    read_values = classmethod(read_values)
-
-    def convert_mbcs(s):
-        dec = getattr(s, "decode", None)
-        if dec is not None:
-            try:
-                s = dec("mbcs")
-            except UnicodeError:
-                pass
-        return s
-    convert_mbcs = staticmethod(convert_mbcs)
-
-class MacroExpander:
-
-    def __init__(self, version):
-        self.macros = {}
-        self.vsbase = VS_BASE % version
-        self.load_macros(version)
-
-    def set_macro(self, macro, path, key):
-        self.macros["$(%s)" % macro] = Reg.get_value(path, key)
-
-    def load_macros(self, version):
-        self.set_macro("VCInstallDir", self.vsbase + r"\Setup\VC", "productdir")
-        self.set_macro("VSInstallDir", self.vsbase + r"\Setup\VS", "productdir")
-        self.set_macro("FrameworkDir", NET_BASE, "installroot")
-        try:
-            if version >= 8.0:
-                self.set_macro("FrameworkSDKDir", NET_BASE,
-                               "sdkinstallrootv2.0")
-            else:
-                raise KeyError("sdkinstallrootv2.0")
-        except KeyError:
-            raise DistutilsPlatformError(
-            """Python was built with Visual Studio 2008;
-extensions must be built with a compiler than can generate compatible binaries.
-Visual Studio 2008 was not found on this system. If you have Cygwin installed,
-you can try compiling with MingW32, by passing "-c mingw32" to setup.py.""")
-
-        if version >= 9.0:
-            self.set_macro("FrameworkVersion", self.vsbase, "clr version")
-            self.set_macro("WindowsSdkDir", WINSDK_BASE, "currentinstallfolder")
-        else:
-            p = r"Software\Microsoft\NET Framework Setup\Product"
-            for base in HKEYS:
-                try:
-                    h = RegOpenKeyEx(base, p)
-                except RegError:
-                    continue
-                key = RegEnumKey(h, 0)
-                d = Reg.get_value(base, r"%s\%s" % (p, key))
-                self.macros["$(FrameworkVersion)"] = d["version"]
-
-    def sub(self, s):
-        for k, v in self.macros.items():
-            s = s.replace(k, v)
-        return s
-
-def get_build_version():
-    """Return the version of MSVC that was used to build Python.
-
-    For Python 2.3 and up, the version number is included in
-    sys.version.  For earlier versions, assume the compiler is MSVC 6.
-    """
-    prefix = "MSC v."
-    i = sys.version.find(prefix)
-    if i == -1:
-        return 6
-    i = i + len(prefix)
-    s, rest = sys.version[i:].split(" ", 1)
-    majorVersion = int(s[:-2]) - 6
-    if majorVersion >= 13:
-        # v13 was skipped and should be v14
-        majorVersion += 1
-    minorVersion = int(s[2:3]) / 10.0
-    # I don't think paths are affected by minor version in version 6
-    if majorVersion == 6:
-        minorVersion = 0
-    if majorVersion >= 6:
-        return majorVersion + minorVersion
-    # else we don't know what version of the compiler this is
-    return None
-
-def normalize_and_reduce_paths(paths):
-    """Return a list of normalized paths with duplicates removed.
-
-    The current order of paths is maintained.
-    """
-    # Paths are normalized so things like:  /a and /a/ aren't both preserved.
-    reduced_paths = []
-    for p in paths:
-        np = os.path.normpath(p)
-        # XXX(nnorwitz): O(n**2), if reduced_paths gets long perhaps use a set.
-        if np not in reduced_paths:
-            reduced_paths.append(np)
-    return reduced_paths
-
-def removeDuplicates(variable):
-    """Remove duplicate values of an environment variable.
-    """
-    oldList = variable.split(os.pathsep)
-    newList = []
-    for i in oldList:
-        if i not in newList:
-            newList.append(i)
-    newVariable = os.pathsep.join(newList)
-    return newVariable
-
-def find_vcvarsall(version):
-    """Find the vcvarsall.bat file
-
-    At first it tries to find the productdir of VS 2008 in the registry. If
-    that fails it falls back to the VS90COMNTOOLS env var.
-    """
-    vsbase = VS_BASE % version
-    try:
-        productdir = Reg.get_value(r"%s\Setup\VC" % vsbase,
-                                   "productdir")
-    except KeyError:
-        log.debug("Unable to find productdir in registry")
-        productdir = None
-
-    if not productdir or not os.path.isdir(productdir):
-        toolskey = "VS%0.f0COMNTOOLS" % version
-        toolsdir = os.environ.get(toolskey, None)
-
-        if toolsdir and os.path.isdir(toolsdir):
-            productdir = os.path.join(toolsdir, os.pardir, os.pardir, "VC")
-            productdir = os.path.abspath(productdir)
-            if not os.path.isdir(productdir):
-                log.debug("%s is not a valid directory" % productdir)
-                return None
-        else:
-            log.debug("Env var %s is not set or invalid" % toolskey)
-    if not productdir:
-        log.debug("No productdir found")
-        return None
-    vcvarsall = os.path.join(productdir, "vcvarsall.bat")
-    if os.path.isfile(vcvarsall):
-        return vcvarsall
-    log.debug("Unable to find vcvarsall.bat")
-    return None
-
-def query_vcvarsall(version, arch="x86"):
-    """Launch vcvarsall.bat and read the settings from its environment
-    """
-    vcvarsall = find_vcvarsall(version)
-    interesting = {"include", "lib", "libpath", "path"}
-    result = {}
-
-    if vcvarsall is None:
-        raise DistutilsPlatformError("Unable to find vcvarsall.bat")
-    log.debug("Calling 'vcvarsall.bat %s' (version=%s)", arch, version)
-    popen = subprocess.Popen('"%s" %s & set' % (vcvarsall, arch),
-                             stdout=subprocess.PIPE,
-                             stderr=subprocess.PIPE)
-    try:
-        stdout, stderr = popen.communicate()
-        if popen.wait() != 0:
-            raise DistutilsPlatformError(stderr.decode("mbcs"))
-
-        stdout = stdout.decode("mbcs")
-        for line in stdout.split("\n"):
-            line = Reg.convert_mbcs(line)
-            if '=' not in line:
-                continue
-            line = line.strip()
-            key, value = line.split('=', 1)
-            key = key.lower()
-            if key in interesting:
-                if value.endswith(os.pathsep):
-                    value = value[:-1]
-                result[key] = removeDuplicates(value)
-
-    finally:
-        popen.stdout.close()
-        popen.stderr.close()
-
-    if len(result) != len(interesting):
-        raise ValueError(str(list(result.keys())))
-
-    return result
-
-# More globals
-VERSION = get_build_version()
-if VERSION < 8.0:
-    raise DistutilsPlatformError("VC %0.1f is not supported by this module" % VERSION)
-# MACROS = MacroExpander(VERSION)
-
-class MSVCCompiler(CCompiler) :
-    """Concrete class that implements an interface to Microsoft Visual C++,
-       as defined by the CCompiler abstract class."""
-
-    compiler_type = 'msvc'
-
-    # Just set this so CCompiler's constructor doesn't barf.  We currently
-    # don't use the 'set_executables()' bureaucracy provided by CCompiler,
-    # as it really isn't necessary for this sort of single-compiler class.
-    # Would be nice to have a consistent interface with UnixCCompiler,
-    # though, so it's worth thinking about.
-    executables = {}
-
-    # Private class data (need to distinguish C from C++ source for compiler)
-    _c_extensions = ['.c']
-    _cpp_extensions = ['.cc', '.cpp', '.cxx']
-    _rc_extensions = ['.rc']
-    _mc_extensions = ['.mc']
-
-    # Needed for the filename generation methods provided by the
-    # base class, CCompiler.
-    src_extensions = (_c_extensions + _cpp_extensions +
-                      _rc_extensions + _mc_extensions)
-    res_extension = '.res'
-    obj_extension = '.obj'
-    static_lib_extension = '.lib'
-    shared_lib_extension = '.dll'
-    static_lib_format = shared_lib_format = '%s%s'
-    exe_extension = '.exe'
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-        CCompiler.__init__ (self, verbose, dry_run, force)
-        self.__version = VERSION
-        self.__root = r"Software\Microsoft\VisualStudio"
-        # self.__macros = MACROS
-        self.__paths = []
-        # target platform (.plat_name is consistent with 'bdist')
-        self.plat_name = None
-        self.__arch = None # deprecated name
-        self.initialized = False
-
-    def initialize(self, plat_name=None):
-        # multi-init means we would need to check platform same each time...
-        assert not self.initialized, "don't init multiple times"
-        if plat_name is None:
-            plat_name = get_platform()
-        # sanity check for platforms to prevent obscure errors later.
-        ok_plats = 'win32', 'win-amd64'
-        if plat_name not in ok_plats:
-            raise DistutilsPlatformError("--plat-name must be one of %s" %
-                                         (ok_plats,))
-
-        if "DISTUTILS_USE_SDK" in os.environ and "MSSdk" in os.environ and self.find_exe("cl.exe"):
-            # Assume that the SDK set up everything alright; don't try to be
-            # smarter
-            self.cc = "cl.exe"
-            self.linker = "link.exe"
-            self.lib = "lib.exe"
-            self.rc = "rc.exe"
-            self.mc = "mc.exe"
-        else:
-            # On x86, 'vcvars32.bat amd64' creates an env that doesn't work;
-            # to cross compile, you use 'x86_amd64'.
-            # On AMD64, 'vcvars32.bat amd64' is a native build env; to cross
-            # compile use 'x86' (ie, it runs the x86 compiler directly)
-            if plat_name == get_platform() or plat_name == 'win32':
-                # native build or cross-compile to win32
-                plat_spec = PLAT_TO_VCVARS[plat_name]
-            else:
-                # cross compile from win32 -> some 64bit
-                plat_spec = PLAT_TO_VCVARS[get_platform()] + '_' + \
-                            PLAT_TO_VCVARS[plat_name]
-
-            vc_env = query_vcvarsall(VERSION, plat_spec)
-
-            self.__paths = vc_env['path'].split(os.pathsep)
-            os.environ['lib'] = vc_env['lib']
-            os.environ['include'] = vc_env['include']
-
-            if len(self.__paths) == 0:
-                raise DistutilsPlatformError("Python was built with %s, "
-                       "and extensions need to be built with the same "
-                       "version of the compiler, but it isn't installed."
-                       % self.__product)
-
-            self.cc = self.find_exe("cl.exe")
-            self.linker = self.find_exe("link.exe")
-            self.lib = self.find_exe("lib.exe")
-            self.rc = self.find_exe("rc.exe")   # resource compiler
-            self.mc = self.find_exe("mc.exe")   # message compiler
-            #self.set_path_env_var('lib')
-            #self.set_path_env_var('include')
-
-        # extend the MSVC path with the current path
-        try:
-            for p in os.environ['path'].split(';'):
-                self.__paths.append(p)
-        except KeyError:
-            pass
-        self.__paths = normalize_and_reduce_paths(self.__paths)
-        os.environ['path'] = ";".join(self.__paths)
-
-        self.preprocess_options = None
-        if self.__arch == "x86":
-            self.compile_options = [ '/nologo', '/Ox', '/MD', '/W3',
-                                     '/DNDEBUG']
-            self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3',
-                                          '/Z7', '/D_DEBUG']
-        else:
-            # Win64
-            self.compile_options = [ '/nologo', '/Ox', '/MD', '/W3', '/GS-' ,
-                                     '/DNDEBUG']
-            self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3', '/GS-',
-                                          '/Z7', '/D_DEBUG']
-
-        self.ldflags_shared = ['/DLL', '/nologo', '/INCREMENTAL:NO']
-        if self.__version >= 7:
-            self.ldflags_shared_debug = [
-                '/DLL', '/nologo', '/INCREMENTAL:no', '/DEBUG'
-                ]
-        self.ldflags_static = [ '/nologo']
-
-        self.initialized = True
-
-    # -- Worker methods ------------------------------------------------
-
-    def object_filenames(self,
-                         source_filenames,
-                         strip_dir=0,
-                         output_dir=''):
-        # Copied from ccompiler.py, extended to return .res as 'object'-file
-        # for .rc input file
-        if output_dir is None: output_dir = ''
-        obj_names = []
-        for src_name in source_filenames:
-            (base, ext) = os.path.splitext (src_name)
-            base = os.path.splitdrive(base)[1] # Chop off the drive
-            base = base[os.path.isabs(base):]  # If abs, chop off leading /
-            if ext not in self.src_extensions:
-                # Better to raise an exception instead of silently continuing
-                # and later complain about sources and targets having
-                # different lengths
-                raise CompileError ("Don't know how to compile %s" % src_name)
-            if strip_dir:
-                base = os.path.basename (base)
-            if ext in self._rc_extensions:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.res_extension))
-            elif ext in self._mc_extensions:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.res_extension))
-            else:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.obj_extension))
-        return obj_names
-
-
-    def compile(self, sources,
-                output_dir=None, macros=None, include_dirs=None, debug=0,
-                extra_preargs=None, extra_postargs=None, depends=None):
-
-        if not self.initialized:
-            self.initialize()
-        compile_info = self._setup_compile(output_dir, macros, include_dirs,
-                                           sources, depends, extra_postargs)
-        macros, objects, extra_postargs, pp_opts, build = compile_info
-
-        compile_opts = extra_preargs or []
-        compile_opts.append ('/c')
-        if debug:
-            compile_opts.extend(self.compile_options_debug)
-        else:
-            compile_opts.extend(self.compile_options)
-
-        for obj in objects:
-            try:
-                src, ext = build[obj]
-            except KeyError:
-                continue
-            if debug:
-                # pass the full pathname to MSVC in debug mode,
-                # this allows the debugger to find the source file
-                # without asking the user to browse for it
-                src = os.path.abspath(src)
-
-            if ext in self._c_extensions:
-                input_opt = "/Tc" + src
-            elif ext in self._cpp_extensions:
-                input_opt = "/Tp" + src
-            elif ext in self._rc_extensions:
-                # compile .RC to .RES file
-                input_opt = src
-                output_opt = "/fo" + obj
-                try:
-                    self.spawn([self.rc] + pp_opts +
-                               [output_opt] + [input_opt])
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            elif ext in self._mc_extensions:
-                # Compile .MC to .RC file to .RES file.
-                #   * '-h dir' specifies the directory for the
-                #     generated include file
-                #   * '-r dir' specifies the target directory of the
-                #     generated RC file and the binary message resource
-                #     it includes
-                #
-                # For now (since there are no options to change this),
-                # we use the source-directory for the include file and
-                # the build directory for the RC file and message
-                # resources. This works at least for win32all.
-                h_dir = os.path.dirname(src)
-                rc_dir = os.path.dirname(obj)
-                try:
-                    # first compile .MC to .RC and .H file
-                    self.spawn([self.mc] +
-                               ['-h', h_dir, '-r', rc_dir] + [src])
-                    base, _ = os.path.splitext (os.path.basename (src))
-                    rc_file = os.path.join (rc_dir, base + '.rc')
-                    # then compile .RC to .RES file
-                    self.spawn([self.rc] +
-                               ["/fo" + obj] + [rc_file])
-
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            else:
-                # how to handle this file?
-                raise CompileError("Don't know how to compile %s to %s"
-                                   % (src, obj))
-
-            output_opt = "/Fo" + obj
-            try:
-                self.spawn([self.cc] + compile_opts + pp_opts +
-                           [input_opt, output_opt] +
-                           extra_postargs)
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-        return objects
-
-
-    def create_static_lib(self,
-                          objects,
-                          output_libname,
-                          output_dir=None,
-                          debug=0,
-                          target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        (objects, output_dir) = self._fix_object_args(objects, output_dir)
-        output_filename = self.library_filename(output_libname,
-                                                output_dir=output_dir)
-
-        if self._need_link(objects, output_filename):
-            lib_args = objects + ['/OUT:' + output_filename]
-            if debug:
-                pass # XXX what goes here?
-            try:
-                self.spawn([self.lib] + lib_args)
-            except DistutilsExecError as msg:
-                raise LibError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-
-    def link(self,
-             target_desc,
-             objects,
-             output_filename,
-             output_dir=None,
-             libraries=None,
-             library_dirs=None,
-             runtime_library_dirs=None,
-             export_symbols=None,
-             debug=0,
-             extra_preargs=None,
-             extra_postargs=None,
-             build_temp=None,
-             target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        (objects, output_dir) = self._fix_object_args(objects, output_dir)
-        fixed_args = self._fix_lib_args(libraries, library_dirs,
-                                        runtime_library_dirs)
-        (libraries, library_dirs, runtime_library_dirs) = fixed_args
-
-        if runtime_library_dirs:
-            self.warn ("I don't know what to do with 'runtime_library_dirs': "
-                       + str (runtime_library_dirs))
-
-        lib_opts = gen_lib_options(self,
-                                   library_dirs, runtime_library_dirs,
-                                   libraries)
-        if output_dir is not None:
-            output_filename = os.path.join(output_dir, output_filename)
-
-        if self._need_link(objects, output_filename):
-            if target_desc == CCompiler.EXECUTABLE:
-                if debug:
-                    ldflags = self.ldflags_shared_debug[1:]
-                else:
-                    ldflags = self.ldflags_shared[1:]
-            else:
-                if debug:
-                    ldflags = self.ldflags_shared_debug
-                else:
-                    ldflags = self.ldflags_shared
-
-            export_opts = []
-            for sym in (export_symbols or []):
-                export_opts.append("/EXPORT:" + sym)
-
-            ld_args = (ldflags + lib_opts + export_opts +
-                       objects + ['/OUT:' + output_filename])
-
-            # The MSVC linker generates .lib and .exp files, which cannot be
-            # suppressed by any linker switches. The .lib files may even be
-            # needed! Make sure they are generated in the temporary build
-            # directory. Since they have different names for debug and release
-            # builds, they can go into the same directory.
-            build_temp = os.path.dirname(objects[0])
-            if export_symbols is not None:
-                (dll_name, dll_ext) = os.path.splitext(
-                    os.path.basename(output_filename))
-                implib_file = os.path.join(
-                    build_temp,
-                    self.library_filename(dll_name))
-                ld_args.append ('/IMPLIB:' + implib_file)
-
-            self.manifest_setup_ldargs(output_filename, build_temp, ld_args)
-
-            if extra_preargs:
-                ld_args[:0] = extra_preargs
-            if extra_postargs:
-                ld_args.extend(extra_postargs)
-
-            self.mkpath(os.path.dirname(output_filename))
-            try:
-                self.spawn([self.linker] + ld_args)
-            except DistutilsExecError as msg:
-                raise LinkError(msg)
-
-            # embed the manifest
-            # XXX - this is somewhat fragile - if mt.exe fails, distutils
-            # will still consider the DLL up-to-date, but it will not have a
-            # manifest.  Maybe we should link to a temp file?  OTOH, that
-            # implies a build environment error that shouldn't go undetected.
-            mfinfo = self.manifest_get_embed_info(target_desc, ld_args)
-            if mfinfo is not None:
-                mffilename, mfid = mfinfo
-                out_arg = '-outputresource:%s;%s' % (output_filename, mfid)
-                try:
-                    self.spawn(['mt.exe', '-nologo', '-manifest',
-                                mffilename, out_arg])
-                except DistutilsExecError as msg:
-                    raise LinkError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    def manifest_setup_ldargs(self, output_filename, build_temp, ld_args):
-        # If we need a manifest at all, an embedded manifest is recommended.
-        # See MSDN article titled
-        # "How to: Embed a Manifest Inside a C/C++ Application"
-        # (currently at http://msdn2.microsoft.com/en-us/library/ms235591(VS.80).aspx)
-        # Ask the linker to generate the manifest in the temp dir, so
-        # we can check it, and possibly embed it, later.
-        temp_manifest = os.path.join(
-                build_temp,
-                os.path.basename(output_filename) + ".manifest")
-        ld_args.append('/MANIFESTFILE:' + temp_manifest)
-
-    def manifest_get_embed_info(self, target_desc, ld_args):
-        # If a manifest should be embedded, return a tuple of
-        # (manifest_filename, resource_id).  Returns None if no manifest
-        # should be embedded.  See http://bugs.python.org/issue7833 for why
-        # we want to avoid any manifest for extension modules if we can.
-        for arg in ld_args:
-            if arg.startswith("/MANIFESTFILE:"):
-                temp_manifest = arg.split(":", 1)[1]
-                break
-        else:
-            # no /MANIFESTFILE so nothing to do.
-            return None
-        if target_desc == CCompiler.EXECUTABLE:
-            # by default, executables always get the manifest with the
-            # CRT referenced.
-            mfid = 1
-        else:
-            # Extension modules try and avoid any manifest if possible.
-            mfid = 2
-            temp_manifest = self._remove_visual_c_ref(temp_manifest)
-        if temp_manifest is None:
-            return None
-        return temp_manifest, mfid
-
-    def _remove_visual_c_ref(self, manifest_file):
-        try:
-            # Remove references to the Visual C runtime, so they will
-            # fall through to the Visual C dependency of Python.exe.
-            # This way, when installed for a restricted user (e.g.
-            # runtimes are not in WinSxS folder, but in Python's own
-            # folder), the runtimes do not need to be in every folder
-            # with .pyd's.
-            # Returns either the filename of the modified manifest or
-            # None if no manifest should be embedded.
-            manifest_f = open(manifest_file)
-            try:
-                manifest_buf = manifest_f.read()
-            finally:
-                manifest_f.close()
-            pattern = re.compile(
-                r"""<assemblyIdentity.*?name=("|')Microsoft\."""\
-                r"""VC\d{2}\.CRT("|').*?(/>|</assemblyIdentity>)""",
-                re.DOTALL)
-            manifest_buf = re.sub(pattern, "", manifest_buf)
-            pattern = r"<dependentAssembly>\s*</dependentAssembly>"
-            manifest_buf = re.sub(pattern, "", manifest_buf)
-            # Now see if any other assemblies are referenced - if not, we
-            # don't want a manifest embedded.
-            pattern = re.compile(
-                r"""<assemblyIdentity.*?name=(?:"|')(.+?)(?:"|')"""
-                r""".*?(?:/>|</assemblyIdentity>)""", re.DOTALL)
-            if re.search(pattern, manifest_buf) is None:
-                return None
-
-            manifest_f = open(manifest_file, 'w')
-            try:
-                manifest_f.write(manifest_buf)
-                return manifest_file
-            finally:
-                manifest_f.close()
-        except OSError:
-            pass
-
-    # -- Miscellaneous methods -----------------------------------------
-    # These are all used by the 'gen_lib_options() function, in
-    # ccompiler.py.
-
-    def library_dir_option(self, dir):
-        return "/LIBPATH:" + dir
-
-    def runtime_library_dir_option(self, dir):
-        raise DistutilsPlatformError(
-              "don't know how to set runtime library search path for MSVC++")
-
-    def library_option(self, lib):
-        return self.library_filename(lib)
-
-
-    def find_library_file(self, dirs, lib, debug=0):
-        # Prefer a debugging library if found (and requested), but deal
-        # with it if we don't have one.
-        if debug:
-            try_names = [lib + "_d", lib]
-        else:
-            try_names = [lib]
-        for dir in dirs:
-            for name in try_names:
-                libfile = os.path.join(dir, self.library_filename (name))
-                if os.path.exists(libfile):
-                    return libfile
-        else:
-            # Oops, didn't find it in *any* of 'dirs'
-            return None
-
-    # Helper methods for using the MSVC registry settings
-
-    def find_exe(self, exe):
-        """Return path to an MSVC executable program.
-
-        Tries to find the program in several places: first, one of the
-        MSVC program search paths from the registry; next, the directories
-        in the PATH environment variable.  If any of those work, return an
-        absolute path that is known to exist.  If none of them work, just
-        return the original program name, 'exe'.
-        """
-        for p in self.__paths:
-            fn = os.path.join(os.path.abspath(p), exe)
-            if os.path.isfile(fn):
-                return fn
-
-        # didn't find it; try existing path
-        for p in os.environ['Path'].split(';'):
-            fn = os.path.join(os.path.abspath(p),exe)
-            if os.path.isfile(fn):
-                return fn
-
-        return exe
diff --git a/contrib/tools/python3/src/Lib/distutils/msvccompiler.py b/contrib/tools/python3/src/Lib/distutils/msvccompiler.py
deleted file mode 100644
index f0d04fdb7f..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/msvccompiler.py
+++ /dev/null
@@ -1,642 +0,0 @@
-"""distutils.msvccompiler
-
-Contains MSVCCompiler, an implementation of the abstract CCompiler class
-for the Microsoft Visual Studio.
-"""
-
-# Written by Perry Stoll
-# hacked by Robin Becker and Thomas Heller to do a better job of
-#   finding DevStudio (through the registry)
-
-import sys, os
-from distutils.errors import \
-     DistutilsExecError, DistutilsPlatformError, \
-     CompileError, LibError, LinkError
-from distutils.ccompiler import \
-     CCompiler, gen_lib_options
-from distutils import log
-
-_can_read_reg = False
-try:
-    import winreg
-
-    _can_read_reg = True
-    hkey_mod = winreg
-
-    RegOpenKeyEx = winreg.OpenKeyEx
-    RegEnumKey = winreg.EnumKey
-    RegEnumValue = winreg.EnumValue
-    RegError = winreg.error
-
-except ImportError:
-    try:
-        import win32api
-        import win32con
-        _can_read_reg = True
-        hkey_mod = win32con
-
-        RegOpenKeyEx = win32api.RegOpenKeyEx
-        RegEnumKey = win32api.RegEnumKey
-        RegEnumValue = win32api.RegEnumValue
-        RegError = win32api.error
-    except ImportError:
-        log.info("Warning: Can't read registry to find the "
-                 "necessary compiler setting\n"
-                 "Make sure that Python modules winreg, "
-                 "win32api or win32con are installed.")
-
-if _can_read_reg:
-    HKEYS = (hkey_mod.HKEY_USERS,
-             hkey_mod.HKEY_CURRENT_USER,
-             hkey_mod.HKEY_LOCAL_MACHINE,
-             hkey_mod.HKEY_CLASSES_ROOT)
-
-def read_keys(base, key):
-    """Return list of registry keys."""
-    try:
-        handle = RegOpenKeyEx(base, key)
-    except RegError:
-        return None
-    L = []
-    i = 0
-    while True:
-        try:
-            k = RegEnumKey(handle, i)
-        except RegError:
-            break
-        L.append(k)
-        i += 1
-    return L
-
-def read_values(base, key):
-    """Return dict of registry keys and values.
-
-    All names are converted to lowercase.
-    """
-    try:
-        handle = RegOpenKeyEx(base, key)
-    except RegError:
-        return None
-    d = {}
-    i = 0
-    while True:
-        try:
-            name, value, type = RegEnumValue(handle, i)
-        except RegError:
-            break
-        name = name.lower()
-        d[convert_mbcs(name)] = convert_mbcs(value)
-        i += 1
-    return d
-
-def convert_mbcs(s):
-    dec = getattr(s, "decode", None)
-    if dec is not None:
-        try:
-            s = dec("mbcs")
-        except UnicodeError:
-            pass
-    return s
-
-class MacroExpander:
-    def __init__(self, version):
-        self.macros = {}
-        self.load_macros(version)
-
-    def set_macro(self, macro, path, key):
-        for base in HKEYS:
-            d = read_values(base, path)
-            if d:
-                self.macros["$(%s)" % macro] = d[key]
-                break
-
-    def load_macros(self, version):
-        vsbase = r"Software\Microsoft\VisualStudio\%0.1f" % version
-        self.set_macro("VCInstallDir", vsbase + r"\Setup\VC", "productdir")
-        self.set_macro("VSInstallDir", vsbase + r"\Setup\VS", "productdir")
-        net = r"Software\Microsoft\.NETFramework"
-        self.set_macro("FrameworkDir", net, "installroot")
-        try:
-            if version > 7.0:
-                self.set_macro("FrameworkSDKDir", net, "sdkinstallrootv1.1")
-            else:
-                self.set_macro("FrameworkSDKDir", net, "sdkinstallroot")
-        except KeyError as exc: #
-            raise DistutilsPlatformError(
-            """Python was built with Visual Studio 2003;
-extensions must be built with a compiler than can generate compatible binaries.
-Visual Studio 2003 was not found on this system. If you have Cygwin installed,
-you can try compiling with MingW32, by passing "-c mingw32" to setup.py.""")
-
-        p = r"Software\Microsoft\NET Framework Setup\Product"
-        for base in HKEYS:
-            try:
-                h = RegOpenKeyEx(base, p)
-            except RegError:
-                continue
-            key = RegEnumKey(h, 0)
-            d = read_values(base, r"%s\%s" % (p, key))
-            self.macros["$(FrameworkVersion)"] = d["version"]
-
-    def sub(self, s):
-        for k, v in self.macros.items():
-            s = s.replace(k, v)
-        return s
-
-def get_build_version():
-    """Return the version of MSVC that was used to build Python.
-
-    For Python 2.3 and up, the version number is included in
-    sys.version.  For earlier versions, assume the compiler is MSVC 6.
-    """
-    prefix = "MSC v."
-    i = sys.version.find(prefix)
-    if i == -1:
-        return 6
-    i = i + len(prefix)
-    s, rest = sys.version[i:].split(" ", 1)
-    majorVersion = int(s[:-2]) - 6
-    if majorVersion >= 13:
-        # v13 was skipped and should be v14
-        majorVersion += 1
-    minorVersion = int(s[2:3]) / 10.0
-    # I don't think paths are affected by minor version in version 6
-    if majorVersion == 6:
-        minorVersion = 0
-    if majorVersion >= 6:
-        return majorVersion + minorVersion
-    # else we don't know what version of the compiler this is
-    return None
-
-def get_build_architecture():
-    """Return the processor architecture.
-
-    Possible results are "Intel" or "AMD64".
-    """
-
-    prefix = " bit ("
-    i = sys.version.find(prefix)
-    if i == -1:
-        return "Intel"
-    j = sys.version.find(")", i)
-    return sys.version[i+len(prefix):j]
-
-def normalize_and_reduce_paths(paths):
-    """Return a list of normalized paths with duplicates removed.
-
-    The current order of paths is maintained.
-    """
-    # Paths are normalized so things like:  /a and /a/ aren't both preserved.
-    reduced_paths = []
-    for p in paths:
-        np = os.path.normpath(p)
-        # XXX(nnorwitz): O(n**2), if reduced_paths gets long perhaps use a set.
-        if np not in reduced_paths:
-            reduced_paths.append(np)
-    return reduced_paths
-
-
-class MSVCCompiler(CCompiler) :
-    """Concrete class that implements an interface to Microsoft Visual C++,
-       as defined by the CCompiler abstract class."""
-
-    compiler_type = 'msvc'
-
-    # Just set this so CCompiler's constructor doesn't barf.  We currently
-    # don't use the 'set_executables()' bureaucracy provided by CCompiler,
-    # as it really isn't necessary for this sort of single-compiler class.
-    # Would be nice to have a consistent interface with UnixCCompiler,
-    # though, so it's worth thinking about.
-    executables = {}
-
-    # Private class data (need to distinguish C from C++ source for compiler)
-    _c_extensions = ['.c']
-    _cpp_extensions = ['.cc', '.cpp', '.cxx']
-    _rc_extensions = ['.rc']
-    _mc_extensions = ['.mc']
-
-    # Needed for the filename generation methods provided by the
-    # base class, CCompiler.
-    src_extensions = (_c_extensions + _cpp_extensions +
-                      _rc_extensions + _mc_extensions)
-    res_extension = '.res'
-    obj_extension = '.obj'
-    static_lib_extension = '.lib'
-    shared_lib_extension = '.dll'
-    static_lib_format = shared_lib_format = '%s%s'
-    exe_extension = '.exe'
-
-    def __init__(self, verbose=0, dry_run=0, force=0):
-        CCompiler.__init__ (self, verbose, dry_run, force)
-        self.__version = get_build_version()
-        self.__arch = get_build_architecture()
-        if self.__arch == "Intel":
-            # x86
-            if self.__version >= 7:
-                self.__root = r"Software\Microsoft\VisualStudio"
-                self.__macros = MacroExpander(self.__version)
-            else:
-                self.__root = r"Software\Microsoft\Devstudio"
-            self.__product = "Visual Studio version %s" % self.__version
-        else:
-            # Win64. Assume this was built with the platform SDK
-            self.__product = "Microsoft SDK compiler %s" % (self.__version + 6)
-
-        self.initialized = False
-
-    def initialize(self):
-        self.__paths = []
-        if "DISTUTILS_USE_SDK" in os.environ and "MSSdk" in os.environ and self.find_exe("cl.exe"):
-            # Assume that the SDK set up everything alright; don't try to be
-            # smarter
-            self.cc = "cl.exe"
-            self.linker = "link.exe"
-            self.lib = "lib.exe"
-            self.rc = "rc.exe"
-            self.mc = "mc.exe"
-        else:
-            self.__paths = self.get_msvc_paths("path")
-
-            if len(self.__paths) == 0:
-                raise DistutilsPlatformError("Python was built with %s, "
-                       "and extensions need to be built with the same "
-                       "version of the compiler, but it isn't installed."
-                       % self.__product)
-
-            self.cc = self.find_exe("cl.exe")
-            self.linker = self.find_exe("link.exe")
-            self.lib = self.find_exe("lib.exe")
-            self.rc = self.find_exe("rc.exe")   # resource compiler
-            self.mc = self.find_exe("mc.exe")   # message compiler
-            self.set_path_env_var('lib')
-            self.set_path_env_var('include')
-
-        # extend the MSVC path with the current path
-        try:
-            for p in os.environ['path'].split(';'):
-                self.__paths.append(p)
-        except KeyError:
-            pass
-        self.__paths = normalize_and_reduce_paths(self.__paths)
-        os.environ['path'] = ";".join(self.__paths)
-
-        self.preprocess_options = None
-        if self.__arch == "Intel":
-            self.compile_options = [ '/nologo', '/Ox', '/MD', '/W3', '/GX' ,
-                                     '/DNDEBUG']
-            self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3', '/GX',
-                                          '/Z7', '/D_DEBUG']
-        else:
-            # Win64
-            self.compile_options = [ '/nologo', '/Ox', '/MD', '/W3', '/GS-' ,
-                                     '/DNDEBUG']
-            self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3', '/GS-',
-                                          '/Z7', '/D_DEBUG']
-
-        self.ldflags_shared = ['/DLL', '/nologo', '/INCREMENTAL:NO']
-        if self.__version >= 7:
-            self.ldflags_shared_debug = [
-                '/DLL', '/nologo', '/INCREMENTAL:no', '/DEBUG'
-                ]
-        else:
-            self.ldflags_shared_debug = [
-                '/DLL', '/nologo', '/INCREMENTAL:no', '/pdb:None', '/DEBUG'
-                ]
-        self.ldflags_static = [ '/nologo']
-
-        self.initialized = True
-
-    # -- Worker methods ------------------------------------------------
-
-    def object_filenames(self,
-                         source_filenames,
-                         strip_dir=0,
-                         output_dir=''):
-        # Copied from ccompiler.py, extended to return .res as 'object'-file
-        # for .rc input file
-        if output_dir is None: output_dir = ''
-        obj_names = []
-        for src_name in source_filenames:
-            (base, ext) = os.path.splitext (src_name)
-            base = os.path.splitdrive(base)[1] # Chop off the drive
-            base = base[os.path.isabs(base):]  # If abs, chop off leading /
-            if ext not in self.src_extensions:
-                # Better to raise an exception instead of silently continuing
-                # and later complain about sources and targets having
-                # different lengths
-                raise CompileError ("Don't know how to compile %s" % src_name)
-            if strip_dir:
-                base = os.path.basename (base)
-            if ext in self._rc_extensions:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.res_extension))
-            elif ext in self._mc_extensions:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.res_extension))
-            else:
-                obj_names.append (os.path.join (output_dir,
-                                                base + self.obj_extension))
-        return obj_names
-
-
-    def compile(self, sources,
-                output_dir=None, macros=None, include_dirs=None, debug=0,
-                extra_preargs=None, extra_postargs=None, depends=None):
-
-        if not self.initialized:
-            self.initialize()
-        compile_info = self._setup_compile(output_dir, macros, include_dirs,
-                                           sources, depends, extra_postargs)
-        macros, objects, extra_postargs, pp_opts, build = compile_info
-
-        compile_opts = extra_preargs or []
-        compile_opts.append ('/c')
-        if debug:
-            compile_opts.extend(self.compile_options_debug)
-        else:
-            compile_opts.extend(self.compile_options)
-
-        for obj in objects:
-            try:
-                src, ext = build[obj]
-            except KeyError:
-                continue
-            if debug:
-                # pass the full pathname to MSVC in debug mode,
-                # this allows the debugger to find the source file
-                # without asking the user to browse for it
-                src = os.path.abspath(src)
-
-            if ext in self._c_extensions:
-                input_opt = "/Tc" + src
-            elif ext in self._cpp_extensions:
-                input_opt = "/Tp" + src
-            elif ext in self._rc_extensions:
-                # compile .RC to .RES file
-                input_opt = src
-                output_opt = "/fo" + obj
-                try:
-                    self.spawn([self.rc] + pp_opts +
-                               [output_opt] + [input_opt])
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            elif ext in self._mc_extensions:
-                # Compile .MC to .RC file to .RES file.
-                #   * '-h dir' specifies the directory for the
-                #     generated include file
-                #   * '-r dir' specifies the target directory of the
-                #     generated RC file and the binary message resource
-                #     it includes
-                #
-                # For now (since there are no options to change this),
-                # we use the source-directory for the include file and
-                # the build directory for the RC file and message
-                # resources. This works at least for win32all.
-                h_dir = os.path.dirname(src)
-                rc_dir = os.path.dirname(obj)
-                try:
-                    # first compile .MC to .RC and .H file
-                    self.spawn([self.mc] +
-                               ['-h', h_dir, '-r', rc_dir] + [src])
-                    base, _ = os.path.splitext (os.path.basename (src))
-                    rc_file = os.path.join (rc_dir, base + '.rc')
-                    # then compile .RC to .RES file
-                    self.spawn([self.rc] +
-                               ["/fo" + obj] + [rc_file])
-
-                except DistutilsExecError as msg:
-                    raise CompileError(msg)
-                continue
-            else:
-                # how to handle this file?
-                raise CompileError("Don't know how to compile %s to %s"
-                                   % (src, obj))
-
-            output_opt = "/Fo" + obj
-            try:
-                self.spawn([self.cc] + compile_opts + pp_opts +
-                           [input_opt, output_opt] +
-                           extra_postargs)
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-        return objects
-
-
-    def create_static_lib(self,
-                          objects,
-                          output_libname,
-                          output_dir=None,
-                          debug=0,
-                          target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        (objects, output_dir) = self._fix_object_args(objects, output_dir)
-        output_filename = self.library_filename(output_libname,
-                                                output_dir=output_dir)
-
-        if self._need_link(objects, output_filename):
-            lib_args = objects + ['/OUT:' + output_filename]
-            if debug:
-                pass # XXX what goes here?
-            try:
-                self.spawn([self.lib] + lib_args)
-            except DistutilsExecError as msg:
-                raise LibError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-
-    def link(self,
-             target_desc,
-             objects,
-             output_filename,
-             output_dir=None,
-             libraries=None,
-             library_dirs=None,
-             runtime_library_dirs=None,
-             export_symbols=None,
-             debug=0,
-             extra_preargs=None,
-             extra_postargs=None,
-             build_temp=None,
-             target_lang=None):
-
-        if not self.initialized:
-            self.initialize()
-        (objects, output_dir) = self._fix_object_args(objects, output_dir)
-        fixed_args = self._fix_lib_args(libraries, library_dirs,
-                                        runtime_library_dirs)
-        (libraries, library_dirs, runtime_library_dirs) = fixed_args
-
-        if runtime_library_dirs:
-            self.warn ("I don't know what to do with 'runtime_library_dirs': "
-                       + str (runtime_library_dirs))
-
-        lib_opts = gen_lib_options(self,
-                                   library_dirs, runtime_library_dirs,
-                                   libraries)
-        if output_dir is not None:
-            output_filename = os.path.join(output_dir, output_filename)
-
-        if self._need_link(objects, output_filename):
-            if target_desc == CCompiler.EXECUTABLE:
-                if debug:
-                    ldflags = self.ldflags_shared_debug[1:]
-                else:
-                    ldflags = self.ldflags_shared[1:]
-            else:
-                if debug:
-                    ldflags = self.ldflags_shared_debug
-                else:
-                    ldflags = self.ldflags_shared
-
-            export_opts = []
-            for sym in (export_symbols or []):
-                export_opts.append("/EXPORT:" + sym)
-
-            ld_args = (ldflags + lib_opts + export_opts +
-                       objects + ['/OUT:' + output_filename])
-
-            # The MSVC linker generates .lib and .exp files, which cannot be
-            # suppressed by any linker switches. The .lib files may even be
-            # needed! Make sure they are generated in the temporary build
-            # directory. Since they have different names for debug and release
-            # builds, they can go into the same directory.
-            if export_symbols is not None:
-                (dll_name, dll_ext) = os.path.splitext(
-                    os.path.basename(output_filename))
-                implib_file = os.path.join(
-                    os.path.dirname(objects[0]),
-                    self.library_filename(dll_name))
-                ld_args.append ('/IMPLIB:' + implib_file)
-
-            if extra_preargs:
-                ld_args[:0] = extra_preargs
-            if extra_postargs:
-                ld_args.extend(extra_postargs)
-
-            self.mkpath(os.path.dirname(output_filename))
-            try:
-                self.spawn([self.linker] + ld_args)
-            except DistutilsExecError as msg:
-                raise LinkError(msg)
-
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-
-    # -- Miscellaneous methods -----------------------------------------
-    # These are all used by the 'gen_lib_options() function, in
-    # ccompiler.py.
-
-    def library_dir_option(self, dir):
-        return "/LIBPATH:" + dir
-
-    def runtime_library_dir_option(self, dir):
-        raise DistutilsPlatformError(
-              "don't know how to set runtime library search path for MSVC++")
-
-    def library_option(self, lib):
-        return self.library_filename(lib)
-
-
-    def find_library_file(self, dirs, lib, debug=0):
-        # Prefer a debugging library if found (and requested), but deal
-        # with it if we don't have one.
-        if debug:
-            try_names = [lib + "_d", lib]
-        else:
-            try_names = [lib]
-        for dir in dirs:
-            for name in try_names:
-                libfile = os.path.join(dir, self.library_filename (name))
-                if os.path.exists(libfile):
-                    return libfile
-        else:
-            # Oops, didn't find it in *any* of 'dirs'
-            return None
-
-    # Helper methods for using the MSVC registry settings
-
-    def find_exe(self, exe):
-        """Return path to an MSVC executable program.
-
-        Tries to find the program in several places: first, one of the
-        MSVC program search paths from the registry; next, the directories
-        in the PATH environment variable.  If any of those work, return an
-        absolute path that is known to exist.  If none of them work, just
-        return the original program name, 'exe'.
-        """
-        for p in self.__paths:
-            fn = os.path.join(os.path.abspath(p), exe)
-            if os.path.isfile(fn):
-                return fn
-
-        # didn't find it; try existing path
-        for p in os.environ['Path'].split(';'):
-            fn = os.path.join(os.path.abspath(p),exe)
-            if os.path.isfile(fn):
-                return fn
-
-        return exe
-
-    def get_msvc_paths(self, path, platform='x86'):
-        """Get a list of devstudio directories (include, lib or path).
-
-        Return a list of strings.  The list will be empty if unable to
-        access the registry or appropriate registry keys not found.
-        """
-        if not _can_read_reg:
-            return []
-
-        path = path + " dirs"
-        if self.__version >= 7:
-            key = (r"%s\%0.1f\VC\VC_OBJECTS_PLATFORM_INFO\Win32\Directories"
-                   % (self.__root, self.__version))
-        else:
-            key = (r"%s\6.0\Build System\Components\Platforms"
-                   r"\Win32 (%s)\Directories" % (self.__root, platform))
-
-        for base in HKEYS:
-            d = read_values(base, key)
-            if d:
-                if self.__version >= 7:
-                    return self.__macros.sub(d[path]).split(";")
-                else:
-                    return d[path].split(";")
-        # MSVC 6 seems to create the registry entries we need only when
-        # the GUI is run.
-        if self.__version == 6:
-            for base in HKEYS:
-                if read_values(base, r"%s\6.0" % self.__root) is not None:
-                    self.warn("It seems you have Visual Studio 6 installed, "
-                        "but the expected registry settings are not present.\n"
-                        "You must at least run the Visual Studio GUI once "
-                        "so that these entries are created.")
-                    break
-        return []
-
-    def set_path_env_var(self, name):
-        """Set environment variable 'name' to an MSVC path type value.
-
-        This is equivalent to a SET command prior to execution of spawned
-        commands.
-        """
-
-        if name == "lib":
-            p = self.get_msvc_paths("library")
-        else:
-            p = self.get_msvc_paths(name)
-        if p:
-            os.environ[name] = ';'.join(p)
-
-
-if get_build_version() >= 8.0:
-    log.debug("Importing new compiler from distutils.msvc9compiler")
-    OldMSVCCompiler = MSVCCompiler
-    from distutils.msvc9compiler import MSVCCompiler
-    # get_build_architecture not really relevant now we support cross-compile
-    from distutils.msvc9compiler import MacroExpander
diff --git a/contrib/tools/python3/src/Lib/distutils/spawn.py b/contrib/tools/python3/src/Lib/distutils/spawn.py
deleted file mode 100644
index 31df3f7fac..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/spawn.py
+++ /dev/null
@@ -1,129 +0,0 @@
-"""distutils.spawn
-
-Provides the 'spawn()' function, a front-end to various platform-
-specific functions for launching another program in a sub-process.
-Also provides the 'find_executable()' to search the path for a given
-executable name.
-"""
-
-import sys
-import os
-import subprocess
-
-from distutils.errors import DistutilsPlatformError, DistutilsExecError
-from distutils.debug import DEBUG
-from distutils import log
-
-
-if sys.platform == 'darwin':
-    _cfg_target = None
-    _cfg_target_split = None
-
-
-def spawn(cmd, search_path=1, verbose=0, dry_run=0):
-    """Run another program, specified as a command list 'cmd', in a new process.
-
-    'cmd' is just the argument list for the new process, ie.
-    cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
-    There is no way to run a program with a name different from that of its
-    executable.
-
-    If 'search_path' is true (the default), the system's executable
-    search path will be used to find the program; otherwise, cmd[0]
-    must be the exact path to the executable.  If 'dry_run' is true,
-    the command will not actually be run.
-
-    Raise DistutilsExecError if running the program fails in any way; just
-    return on success.
-    """
-    # cmd is documented as a list, but just in case some code passes a tuple
-    # in, protect our %-formatting code against horrible death
-    cmd = list(cmd)
-
-    log.info(' '.join(cmd))
-    if dry_run:
-        return
-
-    if search_path:
-        executable = find_executable(cmd[0])
-        if executable is not None:
-            cmd[0] = executable
-
-    env = None
-    if sys.platform == 'darwin':
-        global _cfg_target, _cfg_target_split
-        if _cfg_target is None:
-            from distutils import sysconfig
-            _cfg_target = sysconfig.get_config_var(
-                                  'MACOSX_DEPLOYMENT_TARGET') or ''
-            if _cfg_target:
-                _cfg_target_split = [int(x) for x in _cfg_target.split('.')]
-        if _cfg_target:
-            # Ensure that the deployment target of the build process is not
-            # less than 10.3 if the interpreter was built for 10.3 or later.
-            # This ensures extension modules are built with correct
-            # compatibility values, specifically LDSHARED which can use
-            # '-undefined dynamic_lookup' which only works on >= 10.3.
-            cur_target = os.environ.get('MACOSX_DEPLOYMENT_TARGET', _cfg_target)
-            cur_target_split = [int(x) for x in cur_target.split('.')]
-            if _cfg_target_split[:2] >= [10, 3] and cur_target_split[:2] < [10, 3]:
-                my_msg = ('$MACOSX_DEPLOYMENT_TARGET mismatch: '
-                          'now "%s" but "%s" during configure;'
-                          'must use 10.3 or later'
-                                % (cur_target, _cfg_target))
-                raise DistutilsPlatformError(my_msg)
-            env = dict(os.environ,
-                       MACOSX_DEPLOYMENT_TARGET=cur_target)
-
-    try:
-        proc = subprocess.Popen(cmd, env=env)
-        proc.wait()
-        exitcode = proc.returncode
-    except OSError as exc:
-        if not DEBUG:
-            cmd = cmd[0]
-        raise DistutilsExecError(
-            "command %r failed: %s" % (cmd, exc.args[-1])) from exc
-
-    if exitcode:
-        if not DEBUG:
-            cmd = cmd[0]
-        raise DistutilsExecError(
-              "command %r failed with exit code %s" % (cmd, exitcode))
-
-
-def find_executable(executable, path=None):
-    """Tries to find 'executable' in the directories listed in 'path'.
-
-    A string listing directories separated by 'os.pathsep'; defaults to
-    os.environ['PATH'].  Returns the complete filename or None if not found.
-    """
-    _, ext = os.path.splitext(executable)
-    if (sys.platform == 'win32') and (ext != '.exe'):
-        executable = executable + '.exe'
-
-    if os.path.isfile(executable):
-        return executable
-
-    if path is None:
-        path = os.environ.get('PATH', None)
-        if path is None:
-            try:
-                path = os.confstr("CS_PATH")
-            except (AttributeError, ValueError):
-                # os.confstr() or CS_PATH is not available
-                path = os.defpath
-        # bpo-35755: Don't use os.defpath if the PATH environment variable is
-        # set to an empty string
-
-    # PATH='' doesn't match, whereas PATH=':' looks in the current directory
-    if not path:
-        return None
-
-    paths = path.split(os.pathsep)
-    for p in paths:
-        f = os.path.join(p, executable)
-        if os.path.isfile(f):
-            # the file exists, we have a shot at spawn working
-            return f
-    return None
diff --git a/contrib/tools/python3/src/Lib/distutils/sysconfig.py b/contrib/tools/python3/src/Lib/distutils/sysconfig.py
deleted file mode 100644
index 03b8558419..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/sysconfig.py
+++ /dev/null
@@ -1,346 +0,0 @@
-"""Provide access to Python's configuration information.  The specific
-configuration variables available depend heavily on the platform and
-configuration.  The values may be retrieved using
-get_config_var(name), and the list of variables is available via
-get_config_vars().keys().  Additional convenience functions are also
-available.
-
-Written by:   Fred L. Drake, Jr.
-Email:        <fdrake@acm.org>
-"""
-
-import _imp
-import os
-import re
-import sys
-import warnings
-
-from functools import partial
-
-from .errors import DistutilsPlatformError
-
-from sysconfig import (
-    _PREFIX as PREFIX,
-    _BASE_PREFIX as BASE_PREFIX,
-    _EXEC_PREFIX as EXEC_PREFIX,
-    _BASE_EXEC_PREFIX as BASE_EXEC_PREFIX,
-    _PROJECT_BASE as project_base,
-    _PYTHON_BUILD as python_build,
-    _init_posix as sysconfig_init_posix,
-    parse_config_h as sysconfig_parse_config_h,
-
-    _init_non_posix,
-
-    _variable_rx,
-    _findvar1_rx,
-    _findvar2_rx,
-
-    expand_makefile_vars,
-    is_python_build,
-    get_config_h_filename,
-    get_config_var,
-    get_config_vars,
-    get_makefile_filename,
-    get_python_version,
-)
-
-# This is better than
-# from sysconfig import _CONFIG_VARS as _config_vars
-# because it makes sure that the global dictionary is initialized
-# which might not be true in the time of import.
-_config_vars = get_config_vars()
-
-warnings.warn(
-    'The distutils.sysconfig module is deprecated, use sysconfig instead',
-    DeprecationWarning,
-    stacklevel=2
-)
-
-
-# Following functions are the same as in sysconfig but with different API
-def parse_config_h(fp, g=None):
-    return sysconfig_parse_config_h(fp, vars=g)
-
-
-_python_build = partial(is_python_build, check_home=True)
-_init_posix = partial(sysconfig_init_posix, _config_vars)
-_init_nt = partial(_init_non_posix, _config_vars)
-
-
-# Similar function is also implemented in sysconfig as _parse_makefile
-# but without the parsing capabilities of distutils.text_file.TextFile.
-def parse_makefile(fn, g=None):
-    """Parse a Makefile-style file.
-    A dictionary containing name/value pairs is returned.  If an
-    optional dictionary is passed in as the second argument, it is
-    used instead of a new dictionary.
-    """
-    from distutils.text_file import TextFile
-    fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1, errors="surrogateescape")
-
-    if g is None:
-        g = {}
-    done = {}
-    notdone = {}
-
-    while True:
-        line = fp.readline()
-        if line is None: # eof
-            break
-        m = re.match(_variable_rx, line)
-        if m:
-            n, v = m.group(1, 2)
-            v = v.strip()
-            # `$$' is a literal `$' in make
-            tmpv = v.replace('$$', '')
-
-            if "$" in tmpv:
-                notdone[n] = v
-            else:
-                try:
-                    v = int(v)
-                except ValueError:
-                    # insert literal `$'
-                    done[n] = v.replace('$$', '$')
-                else:
-                    done[n] = v
-
-    # Variables with a 'PY_' prefix in the makefile. These need to
-    # be made available without that prefix through sysconfig.
-    # Special care is needed to ensure that variable expansion works, even
-    # if the expansion uses the name without a prefix.
-    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
-
-    # do variable interpolation here
-    while notdone:
-        for name in list(notdone):
-            value = notdone[name]
-            m = re.search(_findvar1_rx, value) or re.search(_findvar2_rx, value)
-            if m:
-                n = m.group(1)
-                found = True
-                if n in done:
-                    item = str(done[n])
-                elif n in notdone:
-                    # get it on a subsequent round
-                    found = False
-                elif n in os.environ:
-                    # do it like make: fall back to environment
-                    item = os.environ[n]
-
-                elif n in renamed_variables:
-                    if name.startswith('PY_') and name[3:] in renamed_variables:
-                        item = ""
-
-                    elif 'PY_' + n in notdone:
-                        found = False
-
-                    else:
-                        item = str(done['PY_' + n])
-                else:
-                    done[n] = item = ""
-                if found:
-                    after = value[m.end():]
-                    value = value[:m.start()] + item + after
-                    if "$" in after:
-                        notdone[name] = value
-                    else:
-                        try: value = int(value)
-                        except ValueError:
-                            done[name] = value.strip()
-                        else:
-                            done[name] = value
-                        del notdone[name]
-
-                        if name.startswith('PY_') \
-                            and name[3:] in renamed_variables:
-
-                            name = name[3:]
-                            if name not in done:
-                                done[name] = value
-            else:
-                # bogus variable reference; just drop it since we can't deal
-                del notdone[name]
-
-    fp.close()
-
-    # strip spurious spaces
-    for k, v in done.items():
-        if isinstance(v, str):
-            done[k] = v.strip()
-
-    # save the results in the global dictionary
-    g.update(done)
-    return g
-
-
-# Following functions are deprecated together with this module and they
-# have no direct replacement
-
-# Calculate the build qualifier flags if they are defined.  Adding the flags
-# to the include and lib directories only makes sense for an installation, not
-# an in-source build.
-build_flags = ''
-try:
-    if not python_build:
-        build_flags = sys.abiflags
-except AttributeError:
-    # It's not a configure-based build, so the sys module doesn't have
-    # this attribute, which is fine.
-    pass
-
-
-def customize_compiler(compiler):
-    """Do any platform-specific customization of a CCompiler instance.
-
-    Mainly needed on Unix, so we can plug in the information that
-    varies across Unices and is stored in Python's Makefile.
-    """
-    if compiler.compiler_type == "unix":
-        if sys.platform == "darwin":
-            # Perform first-time customization of compiler-related
-            # config vars on OS X now that we know we need a compiler.
-            # This is primarily to support Pythons from binary
-            # installers.  The kind and paths to build tools on
-            # the user system may vary significantly from the system
-            # that Python itself was built on.  Also the user OS
-            # version and build tools may not support the same set
-            # of CPU architectures for universal builds.
-            if not _config_vars.get('CUSTOMIZED_OSX_COMPILER'):
-                import _osx_support
-                _osx_support.customize_compiler(_config_vars)
-                _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
-
-        (cc, cxx, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags) = \
-            get_config_vars('CC', 'CXX', 'CFLAGS',
-                            'CCSHARED', 'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS')
-
-        if 'CC' in os.environ:
-            newcc = os.environ['CC']
-            if (sys.platform == 'darwin'
-                    and 'LDSHARED' not in os.environ
-                    and ldshared.startswith(cc)):
-                # On OS X, if CC is overridden, use that as the default
-                #       command for LDSHARED as well
-                ldshared = newcc + ldshared[len(cc):]
-            cc = newcc
-        if 'CXX' in os.environ:
-            cxx = os.environ['CXX']
-        if 'LDSHARED' in os.environ:
-            ldshared = os.environ['LDSHARED']
-        if 'CPP' in os.environ:
-            cpp = os.environ['CPP']
-        else:
-            cpp = cc + " -E"           # not always
-        if 'LDFLAGS' in os.environ:
-            ldshared = ldshared + ' ' + os.environ['LDFLAGS']
-        if 'CFLAGS' in os.environ:
-            cflags = cflags + ' ' + os.environ['CFLAGS']
-            ldshared = ldshared + ' ' + os.environ['CFLAGS']
-        if 'CPPFLAGS' in os.environ:
-            cpp = cpp + ' ' + os.environ['CPPFLAGS']
-            cflags = cflags + ' ' + os.environ['CPPFLAGS']
-            ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
-        if 'AR' in os.environ:
-            ar = os.environ['AR']
-        if 'ARFLAGS' in os.environ:
-            archiver = ar + ' ' + os.environ['ARFLAGS']
-        else:
-            archiver = ar + ' ' + ar_flags
-
-        cc_cmd = cc + ' ' + cflags
-        compiler.set_executables(
-            preprocessor=cpp,
-            compiler=cc_cmd,
-            compiler_so=cc_cmd + ' ' + ccshared,
-            compiler_cxx=cxx,
-            linker_so=ldshared,
-            linker_exe=cc,
-            archiver=archiver)
-
-        compiler.shared_lib_extension = shlib_suffix
-
-
-def get_python_inc(plat_specific=0, prefix=None):
-    """Return the directory containing installed Python header files.
-
-    If 'plat_specific' is false (the default), this is the path to the
-    non-platform-specific header files, i.e. Python.h and so on;
-    otherwise, this is the path to platform-specific header files
-    (namely pyconfig.h).
-
-    If 'prefix' is supplied, use it instead of sys.base_prefix or
-    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
-    """
-    if prefix is None:
-        prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
-    if os.name == "posix":
-        if python_build:
-            # Assume the executable is in the build directory.  The
-            # pyconfig.h file should be in the same directory.  Since
-            # the build directory may not be the source directory, we
-            # must use "srcdir" from the makefile to find the "Include"
-            # directory.
-            if plat_specific:
-                return project_base
-            else:
-                incdir = os.path.join(get_config_var('srcdir'), 'Include')
-                return os.path.normpath(incdir)
-        python_dir = 'python' + get_python_version() + build_flags
-        return os.path.join(prefix, "include", python_dir)
-    elif os.name == "nt":
-        if python_build:
-            # Include both the include and PC dir to ensure we can find
-            # pyconfig.h
-            return (os.path.join(prefix, "include") + os.path.pathsep +
-                    os.path.join(prefix, "PC"))
-        return os.path.join(prefix, "include")
-    else:
-        raise DistutilsPlatformError(
-            "I don't know where Python installs its C header files "
-            "on platform '%s'" % os.name)
-
-
-def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
-    """Return the directory containing the Python library (standard or
-    site additions).
-
-    If 'plat_specific' is true, return the directory containing
-    platform-specific modules, i.e. any module from a non-pure-Python
-    module distribution; otherwise, return the platform-shared library
-    directory.  If 'standard_lib' is true, return the directory
-    containing standard Python library modules; otherwise, return the
-    directory for site-specific modules.
-
-    If 'prefix' is supplied, use it instead of sys.base_prefix or
-    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
-    """
-    if prefix is None:
-        if standard_lib:
-            prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
-        else:
-            prefix = plat_specific and EXEC_PREFIX or PREFIX
-
-    if os.name == "posix":
-        if plat_specific or standard_lib:
-            # Platform-specific modules (any module from a non-pure-Python
-            # module distribution) or standard Python library modules.
-            libdir = sys.platlibdir
-        else:
-            # Pure Python
-            libdir = "lib"
-        libpython = os.path.join(prefix, libdir,
-                                 "python" + get_python_version())
-        if standard_lib:
-            return libpython
-        else:
-            return os.path.join(libpython, "site-packages")
-    elif os.name == "nt":
-        if standard_lib:
-            return os.path.join(prefix, "Lib")
-        else:
-            return os.path.join(prefix, "Lib", "site-packages")
-    else:
-        raise DistutilsPlatformError(
-            "I don't know where Python installs its library "
-            "on platform '%s'" % os.name)
diff --git a/contrib/tools/python3/src/Lib/distutils/text_file.py b/contrib/tools/python3/src/Lib/distutils/text_file.py
deleted file mode 100644
index 93abad38f4..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/text_file.py
+++ /dev/null
@@ -1,286 +0,0 @@
-"""text_file
-
-provides the TextFile class, which gives an interface to text files
-that (optionally) takes care of stripping comments, ignoring blank
-lines, and joining lines with backslashes."""
-
-import sys, io
-
-
-class TextFile:
-    """Provides a file-like object that takes care of all the things you
-       commonly want to do when processing a text file that has some
-       line-by-line syntax: strip comments (as long as "#" is your
-       comment character), skip blank lines, join adjacent lines by
-       escaping the newline (ie. backslash at end of line), strip
-       leading and/or trailing whitespace.  All of these are optional
-       and independently controllable.
-
-       Provides a 'warn()' method so you can generate warning messages that
-       report physical line number, even if the logical line in question
-       spans multiple physical lines.  Also provides 'unreadline()' for
-       implementing line-at-a-time lookahead.
-
-       Constructor is called as:
-
-           TextFile (filename=None, file=None, **options)
-
-       It bombs (RuntimeError) if both 'filename' and 'file' are None;
-       'filename' should be a string, and 'file' a file object (or
-       something that provides 'readline()' and 'close()' methods).  It is
-       recommended that you supply at least 'filename', so that TextFile
-       can include it in warning messages.  If 'file' is not supplied,
-       TextFile creates its own using 'io.open()'.
-
-       The options are all boolean, and affect the value returned by
-       'readline()':
-         strip_comments [default: true]
-           strip from "#" to end-of-line, as well as any whitespace
-           leading up to the "#" -- unless it is escaped by a backslash
-         lstrip_ws [default: false]
-           strip leading whitespace from each line before returning it
-         rstrip_ws [default: true]
-           strip trailing whitespace (including line terminator!) from
-           each line before returning it
-         skip_blanks [default: true}
-           skip lines that are empty *after* stripping comments and
-           whitespace.  (If both lstrip_ws and rstrip_ws are false,
-           then some lines may consist of solely whitespace: these will
-           *not* be skipped, even if 'skip_blanks' is true.)
-         join_lines [default: false]
-           if a backslash is the last non-newline character on a line
-           after stripping comments and whitespace, join the following line
-           to it to form one "logical line"; if N consecutive lines end
-           with a backslash, then N+1 physical lines will be joined to
-           form one logical line.
-         collapse_join [default: false]
-           strip leading whitespace from lines that are joined to their
-           predecessor; only matters if (join_lines and not lstrip_ws)
-         errors [default: 'strict']
-           error handler used to decode the file content
-
-       Note that since 'rstrip_ws' can strip the trailing newline, the
-       semantics of 'readline()' must differ from those of the builtin file
-       object's 'readline()' method!  In particular, 'readline()' returns
-       None for end-of-file: an empty string might just be a blank line (or
-       an all-whitespace line), if 'rstrip_ws' is true but 'skip_blanks' is
-       not."""
-
-    default_options = { 'strip_comments': 1,
-                        'skip_blanks':    1,
-                        'lstrip_ws':      0,
-                        'rstrip_ws':      1,
-                        'join_lines':     0,
-                        'collapse_join':  0,
-                        'errors':         'strict',
-                      }
-
-    def __init__(self, filename=None, file=None, **options):
-        """Construct a new TextFile object.  At least one of 'filename'
-           (a string) and 'file' (a file-like object) must be supplied.
-           They keyword argument options are described above and affect
-           the values returned by 'readline()'."""
-        if filename is None and file is None:
-            raise RuntimeError("you must supply either or both of 'filename' and 'file'")
-
-        # set values for all options -- either from client option hash
-        # or fallback to default_options
-        for opt in self.default_options.keys():
-            if opt in options:
-                setattr(self, opt, options[opt])
-            else:
-                setattr(self, opt, self.default_options[opt])
-
-        # sanity check client option hash
-        for opt in options.keys():
-            if opt not in self.default_options:
-                raise KeyError("invalid TextFile option '%s'" % opt)
-
-        if file is None:
-            self.open(filename)
-        else:
-            self.filename = filename
-            self.file = file
-            self.current_line = 0       # assuming that file is at BOF!
-
-        # 'linebuf' is a stack of lines that will be emptied before we
-        # actually read from the file; it's only populated by an
-        # 'unreadline()' operation
-        self.linebuf = []
-
-    def open(self, filename):
-        """Open a new file named 'filename'.  This overrides both the
-           'filename' and 'file' arguments to the constructor."""
-        self.filename = filename
-        self.file = io.open(self.filename, 'r', errors=self.errors)
-        self.current_line = 0
-
-    def close(self):
-        """Close the current file and forget everything we know about it
-           (filename, current line number)."""
-        file = self.file
-        self.file = None
-        self.filename = None
-        self.current_line = None
-        file.close()
-
-    def gen_error(self, msg, line=None):
-        outmsg = []
-        if line is None:
-            line = self.current_line
-        outmsg.append(self.filename + ", ")
-        if isinstance(line, (list, tuple)):
-            outmsg.append("lines %d-%d: " % tuple(line))
-        else:
-            outmsg.append("line %d: " % line)
-        outmsg.append(str(msg))
-        return "".join(outmsg)
-
-    def error(self, msg, line=None):
-        raise ValueError("error: " + self.gen_error(msg, line))
-
-    def warn(self, msg, line=None):
-        """Print (to stderr) a warning message tied to the current logical
-           line in the current file.  If the current logical line in the
-           file spans multiple physical lines, the warning refers to the
-           whole range, eg. "lines 3-5".  If 'line' supplied, it overrides
-           the current line number; it may be a list or tuple to indicate a
-           range of physical lines, or an integer for a single physical
-           line."""
-        sys.stderr.write("warning: " + self.gen_error(msg, line) + "\n")
-
-    def readline(self):
-        """Read and return a single logical line from the current file (or
-           from an internal buffer if lines have previously been "unread"
-           with 'unreadline()').  If the 'join_lines' option is true, this
-           may involve reading multiple physical lines concatenated into a
-           single string.  Updates the current line number, so calling
-           'warn()' after 'readline()' emits a warning about the physical
-           line(s) just read.  Returns None on end-of-file, since the empty
-           string can occur if 'rstrip_ws' is true but 'strip_blanks' is
-           not."""
-        # If any "unread" lines waiting in 'linebuf', return the top
-        # one.  (We don't actually buffer read-ahead data -- lines only
-        # get put in 'linebuf' if the client explicitly does an
-        # 'unreadline()'.
-        if self.linebuf:
-            line = self.linebuf[-1]
-            del self.linebuf[-1]
-            return line
-
-        buildup_line = ''
-
-        while True:
-            # read the line, make it None if EOF
-            line = self.file.readline()
-            if line == '':
-                line = None
-
-            if self.strip_comments and line:
-
-                # Look for the first "#" in the line.  If none, never
-                # mind.  If we find one and it's the first character, or
-                # is not preceded by "\", then it starts a comment --
-                # strip the comment, strip whitespace before it, and
-                # carry on.  Otherwise, it's just an escaped "#", so
-                # unescape it (and any other escaped "#"'s that might be
-                # lurking in there) and otherwise leave the line alone.
-
-                pos = line.find("#")
-                if pos == -1: # no "#" -- no comments
-                    pass
-
-                # It's definitely a comment -- either "#" is the first
-                # character, or it's elsewhere and unescaped.
-                elif pos == 0 or line[pos-1] != "\\":
-                    # Have to preserve the trailing newline, because it's
-                    # the job of a later step (rstrip_ws) to remove it --
-                    # and if rstrip_ws is false, we'd better preserve it!
-                    # (NB. this means that if the final line is all comment
-                    # and has no trailing newline, we will think that it's
-                    # EOF; I think that's OK.)
-                    eol = (line[-1] == '\n') and '\n' or ''
-                    line = line[0:pos] + eol
-
-                    # If all that's left is whitespace, then skip line
-                    # *now*, before we try to join it to 'buildup_line' --
-                    # that way constructs like
-                    #   hello \\
-                    #   # comment that should be ignored
-                    #   there
-                    # result in "hello there".
-                    if line.strip() == "":
-                        continue
-                else: # it's an escaped "#"
-                    line = line.replace("\\#", "#")
-
-            # did previous line end with a backslash? then accumulate
-            if self.join_lines and buildup_line:
-                # oops: end of file
-                if line is None:
-                    self.warn("continuation line immediately precedes "
-                              "end-of-file")
-                    return buildup_line
-
-                if self.collapse_join:
-                    line = line.lstrip()
-                line = buildup_line + line
-
-                # careful: pay attention to line number when incrementing it
-                if isinstance(self.current_line, list):
-                    self.current_line[1] = self.current_line[1] + 1
-                else:
-                    self.current_line = [self.current_line,
-                                         self.current_line + 1]
-            # just an ordinary line, read it as usual
-            else:
-                if line is None: # eof
-                    return None
-
-                # still have to be careful about incrementing the line number!
-                if isinstance(self.current_line, list):
-                    self.current_line = self.current_line[1] + 1
-                else:
-                    self.current_line = self.current_line + 1
-
-            # strip whitespace however the client wants (leading and
-            # trailing, or one or the other, or neither)
-            if self.lstrip_ws and self.rstrip_ws:
-                line = line.strip()
-            elif self.lstrip_ws:
-                line = line.lstrip()
-            elif self.rstrip_ws:
-                line = line.rstrip()
-
-            # blank line (whether we rstrip'ed or not)? skip to next line
-            # if appropriate
-            if (line == '' or line == '\n') and self.skip_blanks:
-                continue
-
-            if self.join_lines:
-                if line[-1] == '\\':
-                    buildup_line = line[:-1]
-                    continue
-
-                if line[-2:] == '\\\n':
-                    buildup_line = line[0:-2] + '\n'
-                    continue
-
-            # well, I guess there's some actual content there: return it
-            return line
-
-    def readlines(self):
-        """Read and return the list of all logical lines remaining in the
-           current file."""
-        lines = []
-        while True:
-            line = self.readline()
-            if line is None:
-                return lines
-            lines.append(line)
-
-    def unreadline(self, line):
-        """Push 'line' (a string) onto an internal buffer that will be
-           checked by future 'readline()' calls.  Handy for implementing
-           a parser with line-at-a-time lookahead."""
-        self.linebuf.append(line)
diff --git a/contrib/tools/python3/src/Lib/distutils/unixccompiler.py b/contrib/tools/python3/src/Lib/distutils/unixccompiler.py
deleted file mode 100644
index d00c48981e..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/unixccompiler.py
+++ /dev/null
@@ -1,329 +0,0 @@
-"""distutils.unixccompiler
-
-Contains the UnixCCompiler class, a subclass of CCompiler that handles
-the "typical" Unix-style command-line C compiler:
-  * macros defined with -Dname[=value]
-  * macros undefined with -Uname
-  * include search directories specified with -Idir
-  * libraries specified with -lllib
-  * library search directories specified with -Ldir
-  * compile handled by 'cc' (or similar) executable with -c option:
-    compiles .c to .o
-  * link static library handled by 'ar' command (possibly with 'ranlib')
-  * link shared library handled by 'cc -shared'
-"""
-
-import os, sys, re
-
-from distutils import sysconfig
-from distutils.dep_util import newer
-from distutils.ccompiler import \
-     CCompiler, gen_preprocess_options, gen_lib_options
-from distutils.errors import \
-     DistutilsExecError, CompileError, LibError, LinkError
-from distutils import log
-
-if sys.platform == 'darwin':
-    import _osx_support
-
-# XXX Things not currently handled:
-#   * optimization/debug/warning flags; we just use whatever's in Python's
-#     Makefile and live with it.  Is this adequate?  If not, we might
-#     have to have a bunch of subclasses GNUCCompiler, SGICCompiler,
-#     SunCCompiler, and I suspect down that road lies madness.
-#   * even if we don't know a warning flag from an optimization flag,
-#     we need some way for outsiders to feed preprocessor/compiler/linker
-#     flags in to us -- eg. a sysadmin might want to mandate certain flags
-#     via a site config file, or a user might want to set something for
-#     compiling this module distribution only via the setup.py command
-#     line, whatever.  As long as these options come from something on the
-#     current system, they can be as system-dependent as they like, and we
-#     should just happily stuff them into the preprocessor/compiler/linker
-#     options and carry on.
-
-
-class UnixCCompiler(CCompiler):
-
-    compiler_type = 'unix'
-
-    # These are used by CCompiler in two places: the constructor sets
-    # instance attributes 'preprocessor', 'compiler', etc. from them, and
-    # 'set_executable()' allows any of these to be set.  The defaults here
-    # are pretty generic; they will probably have to be set by an outsider
-    # (eg. using information discovered by the sysconfig about building
-    # Python extensions).
-    executables = {'preprocessor' : None,
-                   'compiler'     : ["cc"],
-                   'compiler_so'  : ["cc"],
-                   'compiler_cxx' : ["cc"],
-                   'linker_so'    : ["cc", "-shared"],
-                   'linker_exe'   : ["cc"],
-                   'archiver'     : ["ar", "-cr"],
-                   'ranlib'       : None,
-                  }
-
-    if sys.platform[:6] == "darwin":
-        executables['ranlib'] = ["ranlib"]
-
-    # Needed for the filename generation methods provided by the base
-    # class, CCompiler.  NB. whoever instantiates/uses a particular
-    # UnixCCompiler instance should set 'shared_lib_ext' -- we set a
-    # reasonable common default here, but it's not necessarily used on all
-    # Unices!
-
-    src_extensions = [".c",".C",".cc",".cxx",".cpp",".m"]
-    obj_extension = ".o"
-    static_lib_extension = ".a"
-    shared_lib_extension = ".so"
-    dylib_lib_extension = ".dylib"
-    xcode_stub_lib_extension = ".tbd"
-    static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
-    xcode_stub_lib_format = dylib_lib_format
-    if sys.platform == "cygwin":
-        exe_extension = ".exe"
-
-    def preprocess(self, source, output_file=None, macros=None,
-                   include_dirs=None, extra_preargs=None, extra_postargs=None):
-        fixed_args = self._fix_compile_args(None, macros, include_dirs)
-        ignore, macros, include_dirs = fixed_args
-        pp_opts = gen_preprocess_options(macros, include_dirs)
-        pp_args = self.preprocessor + pp_opts
-        if output_file:
-            pp_args.extend(['-o', output_file])
-        if extra_preargs:
-            pp_args[:0] = extra_preargs
-        if extra_postargs:
-            pp_args.extend(extra_postargs)
-        pp_args.append(source)
-
-        # We need to preprocess: either we're being forced to, or we're
-        # generating output to stdout, or there's a target output file and
-        # the source file is newer than the target (or the target doesn't
-        # exist).
-        if self.force or output_file is None or newer(source, output_file):
-            if output_file:
-                self.mkpath(os.path.dirname(output_file))
-            try:
-                self.spawn(pp_args)
-            except DistutilsExecError as msg:
-                raise CompileError(msg)
-
-    def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
-        compiler_so = self.compiler_so
-        if sys.platform == 'darwin':
-            compiler_so = _osx_support.compiler_fixup(compiler_so,
-                                                    cc_args + extra_postargs)
-        try:
-            self.spawn(compiler_so + cc_args + [src, '-o', obj] +
-                       extra_postargs)
-        except DistutilsExecError as msg:
-            raise CompileError(msg)
-
-    def create_static_lib(self, objects, output_libname,
-                          output_dir=None, debug=0, target_lang=None):
-        objects, output_dir = self._fix_object_args(objects, output_dir)
-
-        output_filename = \
-            self.library_filename(output_libname, output_dir=output_dir)
-
-        if self._need_link(objects, output_filename):
-            self.mkpath(os.path.dirname(output_filename))
-            self.spawn(self.archiver +
-                       [output_filename] +
-                       objects + self.objects)
-
-            # Not many Unices required ranlib anymore -- SunOS 4.x is, I
-            # think the only major Unix that does.  Maybe we need some
-            # platform intelligence here to skip ranlib if it's not
-            # needed -- or maybe Python's configure script took care of
-            # it for us, hence the check for leading colon.
-            if self.ranlib:
-                try:
-                    self.spawn(self.ranlib + [output_filename])
-                except DistutilsExecError as msg:
-                    raise LibError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    def link(self, target_desc, objects,
-             output_filename, output_dir=None, libraries=None,
-             library_dirs=None, runtime_library_dirs=None,
-             export_symbols=None, debug=0, extra_preargs=None,
-             extra_postargs=None, build_temp=None, target_lang=None):
-        objects, output_dir = self._fix_object_args(objects, output_dir)
-        fixed_args = self._fix_lib_args(libraries, library_dirs,
-                                        runtime_library_dirs)
-        libraries, library_dirs, runtime_library_dirs = fixed_args
-
-        lib_opts = gen_lib_options(self, library_dirs, runtime_library_dirs,
-                                   libraries)
-        if not isinstance(output_dir, (str, type(None))):
-            raise TypeError("'output_dir' must be a string or None")
-        if output_dir is not None:
-            output_filename = os.path.join(output_dir, output_filename)
-
-        if self._need_link(objects, output_filename):
-            ld_args = (objects + self.objects +
-                       lib_opts + ['-o', output_filename])
-            if debug:
-                ld_args[:0] = ['-g']
-            if extra_preargs:
-                ld_args[:0] = extra_preargs
-            if extra_postargs:
-                ld_args.extend(extra_postargs)
-            self.mkpath(os.path.dirname(output_filename))
-            try:
-                if target_desc == CCompiler.EXECUTABLE:
-                    linker = self.linker_exe[:]
-                else:
-                    linker = self.linker_so[:]
-                if target_lang == "c++" and self.compiler_cxx:
-                    # skip over environment variable settings if /usr/bin/env
-                    # is used to set up the linker's environment.
-                    # This is needed on OSX. Note: this assumes that the
-                    # normal and C++ compiler have the same environment
-                    # settings.
-                    i = 0
-                    if os.path.basename(linker[0]) == "env":
-                        i = 1
-                        while '=' in linker[i]:
-                            i += 1
-
-                    if os.path.basename(linker[i]) == 'ld_so_aix':
-                        # AIX platforms prefix the compiler with the ld_so_aix
-                        # script, so we need to adjust our linker index
-                        offset = 1
-                    else:
-                        offset = 0
-
-                    linker[i+offset] = self.compiler_cxx[i]
-
-                if sys.platform == 'darwin':
-                    linker = _osx_support.compiler_fixup(linker, ld_args)
-
-                self.spawn(linker + ld_args)
-            except DistutilsExecError as msg:
-                raise LinkError(msg)
-        else:
-            log.debug("skipping %s (up-to-date)", output_filename)
-
-    # -- Miscellaneous methods -----------------------------------------
-    # These are all used by the 'gen_lib_options() function, in
-    # ccompiler.py.
-
-    def library_dir_option(self, dir):
-        return "-L" + dir
-
-    def _is_gcc(self, compiler_name):
-        # clang uses same syntax for rpath as gcc
-        return any(name in compiler_name for name in ("gcc", "g++", "clang"))
-
-    def runtime_library_dir_option(self, dir):
-        # XXX Hackish, at the very least.  See Python bug #445902:
-        # http://sourceforge.net/tracker/index.php
-        #   ?func=detail&aid=445902&group_id=5470&atid=105470
-        # Linkers on different platforms need different options to
-        # specify that directories need to be added to the list of
-        # directories searched for dependencies when a dynamic library
-        # is sought.  GCC on GNU systems (Linux, FreeBSD, ...) has to
-        # be told to pass the -R option through to the linker, whereas
-        # other compilers and gcc on other systems just know this.
-        # Other compilers may need something slightly different.  At
-        # this time, there's no way to determine this information from
-        # the configuration data stored in the Python installation, so
-        # we use this hack.
-        compiler = os.path.basename(sysconfig.get_config_var("CC"))
-        if sys.platform[:6] == "darwin":
-            # MacOSX's linker doesn't understand the -R flag at all
-            return "-L" + dir
-        elif sys.platform[:7] == "freebsd":
-            return "-Wl,-rpath=" + dir
-        elif sys.platform[:5] == "hp-ux":
-            if self._is_gcc(compiler):
-                return ["-Wl,+s", "-L" + dir]
-            return ["+s", "-L" + dir]
-        else:
-            if self._is_gcc(compiler):
-                # gcc on non-GNU systems does not need -Wl, but can
-                # use it anyway.  Since distutils has always passed in
-                # -Wl whenever gcc was used in the past it is probably
-                # safest to keep doing so.
-                if sysconfig.get_config_var("GNULD") == "yes":
-                    # GNU ld needs an extra option to get a RUNPATH
-                    # instead of just an RPATH.
-                    return "-Wl,--enable-new-dtags,-R" + dir
-                else:
-                    return "-Wl,-R" + dir
-            else:
-                # No idea how --enable-new-dtags would be passed on to
-                # ld if this system was using GNU ld.  Don't know if a
-                # system like this even exists.
-                return "-R" + dir
-
-    def library_option(self, lib):
-        return "-l" + lib
-
-    def find_library_file(self, dirs, lib, debug=0):
-        shared_f = self.library_filename(lib, lib_type='shared')
-        dylib_f = self.library_filename(lib, lib_type='dylib')
-        xcode_stub_f = self.library_filename(lib, lib_type='xcode_stub')
-        static_f = self.library_filename(lib, lib_type='static')
-
-        if sys.platform == 'darwin':
-            # On OSX users can specify an alternate SDK using
-            # '-isysroot', calculate the SDK root if it is specified
-            # (and use it further on)
-            #
-            # Note that, as of Xcode 7, Apple SDKs may contain textual stub
-            # libraries with .tbd extensions rather than the normal .dylib
-            # shared libraries installed in /.  The Apple compiler tool
-            # chain handles this transparently but it can cause problems
-            # for programs that are being built with an SDK and searching
-            # for specific libraries.  Callers of find_library_file need to
-            # keep in mind that the base filename of the returned SDK library
-            # file might have a different extension from that of the library
-            # file installed on the running system, for example:
-            #   /Applications/Xcode.app/Contents/Developer/Platforms/
-            #       MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/
-            #       usr/lib/libedit.tbd
-            # vs
-            #   /usr/lib/libedit.dylib
-            cflags = sysconfig.get_config_var('CFLAGS')
-            m = re.search(r'-isysroot\s*(\S+)', cflags)
-            if m is None:
-                sysroot = _osx_support._default_sysroot(sysconfig.get_config_var('CC'))
-            else:
-                sysroot = m.group(1)
-
-
-
-        for dir in dirs:
-            shared = os.path.join(dir, shared_f)
-            dylib = os.path.join(dir, dylib_f)
-            static = os.path.join(dir, static_f)
-            xcode_stub = os.path.join(dir, xcode_stub_f)
-
-            if sys.platform == 'darwin' and (
-                dir.startswith('/System/') or (
-                dir.startswith('/usr/') and not dir.startswith('/usr/local/'))):
-
-                shared = os.path.join(sysroot, dir[1:], shared_f)
-                dylib = os.path.join(sysroot, dir[1:], dylib_f)
-                static = os.path.join(sysroot, dir[1:], static_f)
-                xcode_stub = os.path.join(sysroot, dir[1:], xcode_stub_f)
-
-            # We're second-guessing the linker here, with not much hard
-            # data to go on: GCC seems to prefer the shared library, so I'm
-            # assuming that *all* Unix C compilers do.  And of course I'm
-            # ignoring even GCC's "-static" option.  So sue me.
-            if os.path.exists(dylib):
-                return dylib
-            elif os.path.exists(xcode_stub):
-                return xcode_stub
-            elif os.path.exists(shared):
-                return shared
-            elif os.path.exists(static):
-                return static
-
-        # Oops, didn't find it in *any* of 'dirs'
-        return None
diff --git a/contrib/tools/python3/src/Lib/distutils/util.py b/contrib/tools/python3/src/Lib/distutils/util.py
deleted file mode 100644
index 2ce5c5b64d..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/util.py
+++ /dev/null
@@ -1,562 +0,0 @@
-"""distutils.util
-
-Miscellaneous utility functions -- anything that doesn't fit into
-one of the other *util.py modules.
-"""
-
-import os
-import re
-import importlib.util
-import string
-import sys
-import distutils
-from distutils.errors import DistutilsPlatformError
-from distutils.dep_util import newer
-from distutils.spawn import spawn
-from distutils import log
-from distutils.errors import DistutilsByteCompileError
-
-def get_host_platform():
-    """Return a string that identifies the current platform.  This is used mainly to
-    distinguish platform-specific build directories and platform-specific built
-    distributions.  Typically includes the OS name and version and the
-    architecture (as supplied by 'os.uname()'), although the exact information
-    included depends on the OS; eg. on Linux, the kernel version isn't
-    particularly important.
-
-    Examples of returned values:
-       linux-i586
-       linux-alpha (?)
-       solaris-2.6-sun4u
-
-    Windows will return one of:
-       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
-       win32 (all others - specifically, sys.platform is returned)
-
-    For other non-POSIX platforms, currently just returns 'sys.platform'.
-
-    """
-    if os.name == 'nt':
-        if 'amd64' in sys.version.lower():
-            return 'win-amd64'
-        if '(arm)' in sys.version.lower():
-            return 'win-arm32'
-        if '(arm64)' in sys.version.lower():
-            return 'win-arm64'
-        return sys.platform
-
-    # Set for cross builds explicitly
-    if "_PYTHON_HOST_PLATFORM" in os.environ:
-        return os.environ["_PYTHON_HOST_PLATFORM"]
-
-    if os.name != "posix" or not hasattr(os, 'uname'):
-        # XXX what about the architecture? NT is Intel or Alpha,
-        # Mac OS is M68k or PPC, etc.
-        return sys.platform
-
-    # Try to distinguish various flavours of Unix
-
-    (osname, host, release, version, machine) = os.uname()
-
-    # Convert the OS name to lowercase, remove '/' characters, and translate
-    # spaces (for "Power Macintosh")
-    osname = osname.lower().replace('/', '')
-    machine = machine.replace(' ', '_')
-    machine = machine.replace('/', '-')
-
-    if osname[:5] == "linux":
-        # At least on Linux/Intel, 'machine' is the processor --
-        # i386, etc.
-        # XXX what about Alpha, SPARC, etc?
-        return  "%s-%s" % (osname, machine)
-    elif osname[:5] == "sunos":
-        if release[0] >= "5":           # SunOS 5 == Solaris 2
-            osname = "solaris"
-            release = "%d.%s" % (int(release[0]) - 3, release[2:])
-            # We can't use "platform.architecture()[0]" because a
-            # bootstrap problem. We use a dict to get an error
-            # if some suspicious happens.
-            bitness = {2147483647:"32bit", 9223372036854775807:"64bit"}
-            machine += ".%s" % bitness[sys.maxsize]
-        # fall through to standard osname-release-machine representation
-    elif osname[:3] == "aix":
-        from _aix_support import aix_platform
-        return aix_platform()
-    elif osname[:6] == "cygwin":
-        osname = "cygwin"
-        rel_re = re.compile (r'[\d.]+', re.ASCII)
-        m = rel_re.match(release)
-        if m:
-            release = m.group()
-    elif osname[:6] == "darwin":
-        import _osx_support, distutils.sysconfig
-        osname, release, machine = _osx_support.get_platform_osx(
-                                        distutils.sysconfig.get_config_vars(),
-                                        osname, release, machine)
-
-    return "%s-%s-%s" % (osname, release, machine)
-
-def get_platform():
-    if os.name == 'nt':
-        TARGET_TO_PLAT = {
-            'x86' : 'win32',
-            'x64' : 'win-amd64',
-            'arm' : 'win-arm32',
-        }
-        return TARGET_TO_PLAT.get(os.environ.get('VSCMD_ARG_TGT_ARCH')) or get_host_platform()
-    else:
-        return get_host_platform()
-
-def convert_path (pathname):
-    """Return 'pathname' as a name that will work on the native filesystem,
-    i.e. split it on '/' and put it back together again using the current
-    directory separator.  Needed because filenames in the setup script are
-    always supplied in Unix style, and have to be converted to the local
-    convention before we can actually use them in the filesystem.  Raises
-    ValueError on non-Unix-ish systems if 'pathname' either starts or
-    ends with a slash.
-    """
-    if os.sep == '/':
-        return pathname
-    if not pathname:
-        return pathname
-    if pathname[0] == '/':
-        raise ValueError("path '%s' cannot be absolute" % pathname)
-    if pathname[-1] == '/':
-        raise ValueError("path '%s' cannot end with '/'" % pathname)
-
-    paths = pathname.split('/')
-    while '.' in paths:
-        paths.remove('.')
-    if not paths:
-        return os.curdir
-    return os.path.join(*paths)
-
-# convert_path ()
-
-
-def change_root (new_root, pathname):
-    """Return 'pathname' with 'new_root' prepended.  If 'pathname' is
-    relative, this is equivalent to "os.path.join(new_root,pathname)".
-    Otherwise, it requires making 'pathname' relative and then joining the
-    two, which is tricky on DOS/Windows and Mac OS.
-    """
-    if os.name == 'posix':
-        if not os.path.isabs(pathname):
-            return os.path.join(new_root, pathname)
-        else:
-            return os.path.join(new_root, pathname[1:])
-
-    elif os.name == 'nt':
-        (drive, path) = os.path.splitdrive(pathname)
-        if path[0] == '\\':
-            path = path[1:]
-        return os.path.join(new_root, path)
-
-    else:
-        raise DistutilsPlatformError("nothing known about platform '%s'" % os.name)
-
-
-_environ_checked = 0
-def check_environ ():
-    """Ensure that 'os.environ' has all the environment variables we
-    guarantee that users can use in config files, command-line options,
-    etc.  Currently this includes:
-      HOME - user's home directory (Unix only)
-      PLAT - description of the current platform, including hardware
-             and OS (see 'get_platform()')
-    """
-    global _environ_checked
-    if _environ_checked:
-        return
-
-    if os.name == 'posix' and 'HOME' not in os.environ:
-        try:
-            import pwd
-            os.environ['HOME'] = pwd.getpwuid(os.getuid())[5]
-        except (ImportError, KeyError):
-            # bpo-10496: if the current user identifier doesn't exist in the
-            # password database, do nothing
-            pass
-
-    if 'PLAT' not in os.environ:
-        os.environ['PLAT'] = get_platform()
-
-    _environ_checked = 1
-
-
-def subst_vars (s, local_vars):
-    """Perform shell/Perl-style variable substitution on 'string'.  Every
-    occurrence of '$' followed by a name is considered a variable, and
-    variable is substituted by the value found in the 'local_vars'
-    dictionary, or in 'os.environ' if it's not in 'local_vars'.
-    'os.environ' is first checked/augmented to guarantee that it contains
-    certain values: see 'check_environ()'.  Raise ValueError for any
-    variables not found in either 'local_vars' or 'os.environ'.
-    """
-    check_environ()
-    def _subst (match, local_vars=local_vars):
-        var_name = match.group(1)
-        if var_name in local_vars:
-            return str(local_vars[var_name])
-        else:
-            return os.environ[var_name]
-
-    try:
-        return re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, s)
-    except KeyError as var:
-        raise ValueError("invalid variable '$%s'" % var)
-
-# subst_vars ()
-
-
-def grok_environment_error (exc, prefix="error: "):
-    # Function kept for backward compatibility.
-    # Used to try clever things with EnvironmentErrors,
-    # but nowadays str(exception) produces good messages.
-    return prefix + str(exc)
-
-
-# Needed by 'split_quoted()'
-_wordchars_re = _squote_re = _dquote_re = None
-def _init_regex():
-    global _wordchars_re, _squote_re, _dquote_re
-    _wordchars_re = re.compile(r'[^\\\'\"%s ]*' % string.whitespace)
-    _squote_re = re.compile(r"'(?:[^'\\]|\\.)*'")
-    _dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"')
-
-def split_quoted (s):
-    """Split a string up according to Unix shell-like rules for quotes and
-    backslashes.  In short: words are delimited by spaces, as long as those
-    spaces are not escaped by a backslash, or inside a quoted string.
-    Single and double quotes are equivalent, and the quote characters can
-    be backslash-escaped.  The backslash is stripped from any two-character
-    escape sequence, leaving only the escaped character.  The quote
-    characters are stripped from any quoted string.  Returns a list of
-    words.
-    """
-
-    # This is a nice algorithm for splitting up a single string, since it
-    # doesn't require character-by-character examination.  It was a little
-    # bit of a brain-bender to get it working right, though...
-    if _wordchars_re is None: _init_regex()
-
-    s = s.strip()
-    words = []
-    pos = 0
-
-    while s:
-        m = _wordchars_re.match(s, pos)
-        end = m.end()
-        if end == len(s):
-            words.append(s[:end])
-            break
-
-        if s[end] in string.whitespace: # unescaped, unquoted whitespace: now
-            words.append(s[:end])       # we definitely have a word delimiter
-            s = s[end:].lstrip()
-            pos = 0
-
-        elif s[end] == '\\':            # preserve whatever is being escaped;
-                                        # will become part of the current word
-            s = s[:end] + s[end+1:]
-            pos = end+1
-
-        else:
-            if s[end] == "'":           # slurp singly-quoted string
-                m = _squote_re.match(s, end)
-            elif s[end] == '"':         # slurp doubly-quoted string
-                m = _dquote_re.match(s, end)
-            else:
-                raise RuntimeError("this can't happen (bad char '%c')" % s[end])
-
-            if m is None:
-                raise ValueError("bad string (mismatched %s quotes?)" % s[end])
-
-            (beg, end) = m.span()
-            s = s[:beg] + s[beg+1:end-1] + s[end:]
-            pos = m.end() - 2
-
-        if pos >= len(s):
-            words.append(s)
-            break
-
-    return words
-
-# split_quoted ()
-
-
-def execute (func, args, msg=None, verbose=0, dry_run=0):
-    """Perform some action that affects the outside world (eg.  by
-    writing to the filesystem).  Such actions are special because they
-    are disabled by the 'dry_run' flag.  This method takes care of all
-    that bureaucracy for you; all you have to do is supply the
-    function to call and an argument tuple for it (to embody the
-    "external action" being performed), and an optional message to
-    print.
-    """
-    if msg is None:
-        msg = "%s%r" % (func.__name__, args)
-        if msg[-2:] == ',)':        # correct for singleton tuple
-            msg = msg[0:-2] + ')'
-
-    log.info(msg)
-    if not dry_run:
-        func(*args)
-
-
-def strtobool (val):
-    """Convert a string representation of truth to true (1) or false (0).
-
-    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
-    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
-    'val' is anything else.
-    """
-    val = val.lower()
-    if val in ('y', 'yes', 't', 'true', 'on', '1'):
-        return 1
-    elif val in ('n', 'no', 'f', 'false', 'off', '0'):
-        return 0
-    else:
-        raise ValueError("invalid truth value %r" % (val,))
-
-
-def byte_compile (py_files,
-                  optimize=0, force=0,
-                  prefix=None, base_dir=None,
-                  verbose=1, dry_run=0,
-                  direct=None):
-    """Byte-compile a collection of Python source files to .pyc
-    files in a __pycache__ subdirectory.  'py_files' is a list
-    of files to compile; any files that don't end in ".py" are silently
-    skipped.  'optimize' must be one of the following:
-      0 - don't optimize
-      1 - normal optimization (like "python -O")
-      2 - extra optimization (like "python -OO")
-    If 'force' is true, all files are recompiled regardless of
-    timestamps.
-
-    The source filename encoded in each bytecode file defaults to the
-    filenames listed in 'py_files'; you can modify these with 'prefix' and
-    'basedir'.  'prefix' is a string that will be stripped off of each
-    source filename, and 'base_dir' is a directory name that will be
-    prepended (after 'prefix' is stripped).  You can supply either or both
-    (or neither) of 'prefix' and 'base_dir', as you wish.
-
-    If 'dry_run' is true, doesn't actually do anything that would
-    affect the filesystem.
-
-    Byte-compilation is either done directly in this interpreter process
-    with the standard py_compile module, or indirectly by writing a
-    temporary script and executing it.  Normally, you should let
-    'byte_compile()' figure out to use direct compilation or not (see
-    the source for details).  The 'direct' flag is used by the script
-    generated in indirect mode; unless you know what you're doing, leave
-    it set to None.
-    """
-
-    # Late import to fix a bootstrap issue: _posixsubprocess is built by
-    # setup.py, but setup.py uses distutils.
-    import subprocess
-
-    # nothing is done if sys.dont_write_bytecode is True
-    if sys.dont_write_bytecode:
-        raise DistutilsByteCompileError('byte-compiling is disabled.')
-
-    # First, if the caller didn't force us into direct or indirect mode,
-    # figure out which mode we should be in.  We take a conservative
-    # approach: choose direct mode *only* if the current interpreter is
-    # in debug mode and optimize is 0.  If we're not in debug mode (-O
-    # or -OO), we don't know which level of optimization this
-    # interpreter is running with, so we can't do direct
-    # byte-compilation and be certain that it's the right thing.  Thus,
-    # always compile indirectly if the current interpreter is in either
-    # optimize mode, or if either optimization level was requested by
-    # the caller.
-    if direct is None:
-        direct = (__debug__ and optimize == 0)
-
-    # "Indirect" byte-compilation: write a temporary script and then
-    # run it with the appropriate flags.
-    if not direct:
-        try:
-            from tempfile import mkstemp
-            (script_fd, script_name) = mkstemp(".py")
-        except ImportError:
-            from tempfile import mktemp
-            (script_fd, script_name) = None, mktemp(".py")
-        log.info("writing byte-compilation script '%s'", script_name)
-        if not dry_run:
-            if script_fd is not None:
-                script = os.fdopen(script_fd, "w")
-            else:
-                script = open(script_name, "w")
-
-            with script:
-                script.write("""\
-from distutils.util import byte_compile
-files = [
-""")
-
-                # XXX would be nice to write absolute filenames, just for
-                # safety's sake (script should be more robust in the face of
-                # chdir'ing before running it).  But this requires abspath'ing
-                # 'prefix' as well, and that breaks the hack in build_lib's
-                # 'byte_compile()' method that carefully tacks on a trailing
-                # slash (os.sep really) to make sure the prefix here is "just
-                # right".  This whole prefix business is rather delicate -- the
-                # problem is that it's really a directory, but I'm treating it
-                # as a dumb string, so trailing slashes and so forth matter.
-
-                #py_files = map(os.path.abspath, py_files)
-                #if prefix:
-                #    prefix = os.path.abspath(prefix)
-
-                script.write(",\n".join(map(repr, py_files)) + "]\n")
-                script.write("""
-byte_compile(files, optimize=%r, force=%r,
-             prefix=%r, base_dir=%r,
-             verbose=%r, dry_run=0,
-             direct=1)
-""" % (optimize, force, prefix, base_dir, verbose))
-
-        msg = distutils._DEPRECATION_MESSAGE
-        cmd = [sys.executable]
-        cmd.extend(subprocess._optim_args_from_interpreter_flags())
-        cmd.append(f'-Wignore:{msg}:DeprecationWarning')
-        cmd.append(script_name)
-        spawn(cmd, dry_run=dry_run)
-        execute(os.remove, (script_name,), "removing %s" % script_name,
-                dry_run=dry_run)
-
-    # "Direct" byte-compilation: use the py_compile module to compile
-    # right here, right now.  Note that the script generated in indirect
-    # mode simply calls 'byte_compile()' in direct mode, a weird sort of
-    # cross-process recursion.  Hey, it works!
-    else:
-        from py_compile import compile
-
-        for file in py_files:
-            if file[-3:] != ".py":
-                # This lets us be lazy and not filter filenames in
-                # the "install_lib" command.
-                continue
-
-            # Terminology from the py_compile module:
-            #   cfile - byte-compiled file
-            #   dfile - purported source filename (same as 'file' by default)
-            if optimize >= 0:
-                opt = '' if optimize == 0 else optimize
-                cfile = importlib.util.cache_from_source(
-                    file, optimization=opt)
-            else:
-                cfile = importlib.util.cache_from_source(file)
-            dfile = file
-            if prefix:
-                if file[:len(prefix)] != prefix:
-                    raise ValueError("invalid prefix: filename %r doesn't start with %r"
-                           % (file, prefix))
-                dfile = dfile[len(prefix):]
-            if base_dir:
-                dfile = os.path.join(base_dir, dfile)
-
-            cfile_base = os.path.basename(cfile)
-            if direct:
-                if force or newer(file, cfile):
-                    log.info("byte-compiling %s to %s", file, cfile_base)
-                    if not dry_run:
-                        compile(file, cfile, dfile)
-                else:
-                    log.debug("skipping byte-compilation of %s to %s",
-                              file, cfile_base)
-
-# byte_compile ()
-
-def rfc822_escape (header):
-    """Return a version of the string escaped for inclusion in an
-    RFC-822 header, by ensuring there are 8 spaces space after each newline.
-    """
-    lines = header.split('\n')
-    sep = '\n' + 8 * ' '
-    return sep.join(lines)
-
-# 2to3 support
-
-def run_2to3(files, fixer_names=None, options=None, explicit=None):
-    """Invoke 2to3 on a list of Python files.
-    The files should all come from the build area, as the
-    modification is done in-place. To reduce the build time,
-    only files modified since the last invocation of this
-    function should be passed in the files argument."""
-
-    if not files:
-        return
-
-    # Make this class local, to delay import of 2to3
-    from lib2to3.refactor import RefactoringTool, get_fixers_from_package
-    class DistutilsRefactoringTool(RefactoringTool):
-        def log_error(self, msg, *args, **kw):
-            log.error(msg, *args)
-
-        def log_message(self, msg, *args):
-            log.info(msg, *args)
-
-        def log_debug(self, msg, *args):
-            log.debug(msg, *args)
-
-    if fixer_names is None:
-        fixer_names = get_fixers_from_package('lib2to3.fixes')
-    r = DistutilsRefactoringTool(fixer_names, options=options)
-    r.refactor(files, write=True)
-
-def copydir_run_2to3(src, dest, template=None, fixer_names=None,
-                     options=None, explicit=None):
-    """Recursively copy a directory, only copying new and changed files,
-    running run_2to3 over all newly copied Python modules afterward.
-
-    If you give a template string, it's parsed like a MANIFEST.in.
-    """
-    from distutils.dir_util import mkpath
-    from distutils.file_util import copy_file
-    from distutils.filelist import FileList
-    filelist = FileList()
-    curdir = os.getcwd()
-    os.chdir(src)
-    try:
-        filelist.findall()
-    finally:
-        os.chdir(curdir)
-    filelist.files[:] = filelist.allfiles
-    if template:
-        for line in template.splitlines():
-            line = line.strip()
-            if not line: continue
-            filelist.process_template_line(line)
-    copied = []
-    for filename in filelist.files:
-        outname = os.path.join(dest, filename)
-        mkpath(os.path.dirname(outname))
-        res = copy_file(os.path.join(src, filename), outname, update=1)
-        if res[1]: copied.append(outname)
-    run_2to3([fn for fn in copied if fn.lower().endswith('.py')],
-             fixer_names=fixer_names, options=options, explicit=explicit)
-    return copied
-
-class Mixin2to3:
-    '''Mixin class for commands that run 2to3.
-    To configure 2to3, setup scripts may either change
-    the class variables, or inherit from individual commands
-    to override how 2to3 is invoked.'''
-
-    # provide list of fixers to run;
-    # defaults to all from lib2to3.fixers
-    fixer_names = None
-
-    # options dictionary
-    options = None
-
-    # list of fixers to invoke even though they are marked as explicit
-    explicit = None
-
-    def run_2to3(self, files):
-        return run_2to3(files, self.fixer_names, self.options, self.explicit)
diff --git a/contrib/tools/python3/src/Lib/distutils/version.py b/contrib/tools/python3/src/Lib/distutils/version.py
deleted file mode 100644
index c33bebaed2..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/version.py
+++ /dev/null
@@ -1,347 +0,0 @@
-#
-# distutils/version.py
-#
-# Implements multiple version numbering conventions for the
-# Python Module Distribution Utilities.
-#
-# $Id$
-#
-
-"""Provides classes to represent module version numbers (one class for
-each style of version numbering).  There are currently two such classes
-implemented: StrictVersion and LooseVersion.
-
-Every version number class implements the following interface:
-  * the 'parse' method takes a string and parses it to some internal
-    representation; if the string is an invalid version number,
-    'parse' raises a ValueError exception
-  * the class constructor takes an optional string argument which,
-    if supplied, is passed to 'parse'
-  * __str__ reconstructs the string that was passed to 'parse' (or
-    an equivalent string -- ie. one that will generate an equivalent
-    version number instance)
-  * __repr__ generates Python code to recreate the version number instance
-  * _cmp compares the current instance with either another instance
-    of the same class or a string (which will be parsed to an instance
-    of the same class, thus must follow the same rules)
-"""
-
-import re
-
-class Version:
-    """Abstract base class for version numbering classes.  Just provides
-    constructor (__init__) and reproducer (__repr__), because those
-    seem to be the same for all version numbering classes; and route
-    rich comparisons to _cmp.
-    """
-
-    def __init__ (self, vstring=None):
-        if vstring:
-            self.parse(vstring)
-
-    def __repr__ (self):
-        return "%s ('%s')" % (self.__class__.__name__, str(self))
-
-    def __eq__(self, other):
-        c = self._cmp(other)
-        if c is NotImplemented:
-            return c
-        return c == 0
-
-    def __lt__(self, other):
-        c = self._cmp(other)
-        if c is NotImplemented:
-            return c
-        return c < 0
-
-    def __le__(self, other):
-        c = self._cmp(other)
-        if c is NotImplemented:
-            return c
-        return c <= 0
-
-    def __gt__(self, other):
-        c = self._cmp(other)
-        if c is NotImplemented:
-            return c
-        return c > 0
-
-    def __ge__(self, other):
-        c = self._cmp(other)
-        if c is NotImplemented:
-            return c
-        return c >= 0
-
-
-# Interface for version-number classes -- must be implemented
-# by the following classes (the concrete ones -- Version should
-# be treated as an abstract class).
-#    __init__ (string) - create and take same action as 'parse'
-#                        (string parameter is optional)
-#    parse (string)    - convert a string representation to whatever
-#                        internal representation is appropriate for
-#                        this style of version numbering
-#    __str__ (self)    - convert back to a string; should be very similar
-#                        (if not identical to) the string supplied to parse
-#    __repr__ (self)   - generate Python code to recreate
-#                        the instance
-#    _cmp (self, other) - compare two version numbers ('other' may
-#                        be an unparsed version string, or another
-#                        instance of your version class)
-
-
-class StrictVersion (Version):
-
-    """Version numbering for anal retentives and software idealists.
-    Implements the standard interface for version number classes as
-    described above.  A version number consists of two or three
-    dot-separated numeric components, with an optional "pre-release" tag
-    on the end.  The pre-release tag consists of the letter 'a' or 'b'
-    followed by a number.  If the numeric components of two version
-    numbers are equal, then one with a pre-release tag will always
-    be deemed earlier (lesser) than one without.
-
-    The following are valid version numbers (shown in the order that
-    would be obtained by sorting according to the supplied cmp function):
-
-        0.4       0.4.0  (these two are equivalent)
-        0.4.1
-        0.5a1
-        0.5b3
-        0.5
-        0.9.6
-        1.0
-        1.0.4a3
-        1.0.4b1
-        1.0.4
-
-    The following are examples of invalid version numbers:
-
-        1
-        2.7.2.2
-        1.3.a4
-        1.3pl1
-        1.3c4
-
-    The rationale for this version numbering system will be explained
-    in the distutils documentation.
-    """
-
-    version_re = re.compile(r'^(\d+) \. (\d+) (\. (\d+))? ([ab](\d+))?$',
-                            re.VERBOSE | re.ASCII)
-
-
-    def parse (self, vstring):
-        match = self.version_re.match(vstring)
-        if not match:
-            raise ValueError("invalid version number '%s'" % vstring)
-
-        (major, minor, patch, prerelease, prerelease_num) = \
-            match.group(1, 2, 4, 5, 6)
-
-        if patch:
-            self.version = tuple(map(int, [major, minor, patch]))
-        else:
-            self.version = tuple(map(int, [major, minor])) + (0,)
-
-        if prerelease:
-            self.prerelease = (prerelease[0], int(prerelease_num))
-        else:
-            self.prerelease = None
-
-
-    def __str__ (self):
-
-        if self.version[2] == 0:
-            vstring = '.'.join(map(str, self.version[0:2]))
-        else:
-            vstring = '.'.join(map(str, self.version))
-
-        if self.prerelease:
-            vstring = vstring + self.prerelease[0] + str(self.prerelease[1])
-
-        return vstring
-
-
-    def _cmp (self, other):
-        if isinstance(other, str):
-            other = StrictVersion(other)
-        elif not isinstance(other, StrictVersion):
-            return NotImplemented
-
-        if self.version != other.version:
-            # numeric versions don't match
-            # prerelease stuff doesn't matter
-            if self.version < other.version:
-                return -1
-            else:
-                return 1
-
-        # have to compare prerelease
-        # case 1: neither has prerelease; they're equal
-        # case 2: self has prerelease, other doesn't; other is greater
-        # case 3: self doesn't have prerelease, other does: self is greater
-        # case 4: both have prerelease: must compare them!
-
-        if (not self.prerelease and not other.prerelease):
-            return 0
-        elif (self.prerelease and not other.prerelease):
-            return -1
-        elif (not self.prerelease and other.prerelease):
-            return 1
-        elif (self.prerelease and other.prerelease):
-            if self.prerelease == other.prerelease:
-                return 0
-            elif self.prerelease < other.prerelease:
-                return -1
-            else:
-                return 1
-        else:
-            assert False, "never get here"
-
-# end class StrictVersion
-
-
-# The rules according to Greg Stein:
-# 1) a version number has 1 or more numbers separated by a period or by
-#    sequences of letters. If only periods, then these are compared
-#    left-to-right to determine an ordering.
-# 2) sequences of letters are part of the tuple for comparison and are
-#    compared lexicographically
-# 3) recognize the numeric components may have leading zeroes
-#
-# The LooseVersion class below implements these rules: a version number
-# string is split up into a tuple of integer and string components, and
-# comparison is a simple tuple comparison.  This means that version
-# numbers behave in a predictable and obvious way, but a way that might
-# not necessarily be how people *want* version numbers to behave.  There
-# wouldn't be a problem if people could stick to purely numeric version
-# numbers: just split on period and compare the numbers as tuples.
-# However, people insist on putting letters into their version numbers;
-# the most common purpose seems to be:
-#   - indicating a "pre-release" version
-#     ('alpha', 'beta', 'a', 'b', 'pre', 'p')
-#   - indicating a post-release patch ('p', 'pl', 'patch')
-# but of course this can't cover all version number schemes, and there's
-# no way to know what a programmer means without asking him.
-#
-# The problem is what to do with letters (and other non-numeric
-# characters) in a version number.  The current implementation does the
-# obvious and predictable thing: keep them as strings and compare
-# lexically within a tuple comparison.  This has the desired effect if
-# an appended letter sequence implies something "post-release":
-# eg. "0.99" < "0.99pl14" < "1.0", and "5.001" < "5.001m" < "5.002".
-#
-# However, if letters in a version number imply a pre-release version,
-# the "obvious" thing isn't correct.  Eg. you would expect that
-# "1.5.1" < "1.5.2a2" < "1.5.2", but under the tuple/lexical comparison
-# implemented here, this just isn't so.
-#
-# Two possible solutions come to mind.  The first is to tie the
-# comparison algorithm to a particular set of semantic rules, as has
-# been done in the StrictVersion class above.  This works great as long
-# as everyone can go along with bondage and discipline.  Hopefully a
-# (large) subset of Python module programmers will agree that the
-# particular flavour of bondage and discipline provided by StrictVersion
-# provides enough benefit to be worth using, and will submit their
-# version numbering scheme to its domination.  The free-thinking
-# anarchists in the lot will never give in, though, and something needs
-# to be done to accommodate them.
-#
-# Perhaps a "moderately strict" version class could be implemented that
-# lets almost anything slide (syntactically), and makes some heuristic
-# assumptions about non-digits in version number strings.  This could
-# sink into special-case-hell, though; if I was as talented and
-# idiosyncratic as Larry Wall, I'd go ahead and implement a class that
-# somehow knows that "1.2.1" < "1.2.2a2" < "1.2.2" < "1.2.2pl3", and is
-# just as happy dealing with things like "2g6" and "1.13++".  I don't
-# think I'm smart enough to do it right though.
-#
-# In any case, I've coded the test suite for this module (see
-# ../test/test_version.py) specifically to fail on things like comparing
-# "1.2a2" and "1.2".  That's not because the *code* is doing anything
-# wrong, it's because the simple, obvious design doesn't match my
-# complicated, hairy expectations for real-world version numbers.  It
-# would be a snap to fix the test suite to say, "Yep, LooseVersion does
-# the Right Thing" (ie. the code matches the conception).  But I'd rather
-# have a conception that matches common notions about version numbers.
-
-class LooseVersion (Version):
-
-    """Version numbering for anarchists and software realists.
-    Implements the standard interface for version number classes as
-    described above.  A version number consists of a series of numbers,
-    separated by either periods or strings of letters.  When comparing
-    version numbers, the numeric components will be compared
-    numerically, and the alphabetic components lexically.  The following
-    are all valid version numbers, in no particular order:
-
-        1.5.1
-        1.5.2b2
-        161
-        3.10a
-        8.02
-        3.4j
-        1996.07.12
-        3.2.pl0
-        3.1.1.6
-        2g6
-        11g
-        0.960923
-        2.2beta29
-        1.13++
-        5.5.kw
-        2.0b1pl0
-
-    In fact, there is no such thing as an invalid version number under
-    this scheme; the rules for comparison are simple and predictable,
-    but may not always give the results you want (for some definition
-    of "want").
-    """
-
-    component_re = re.compile(r'(\d+ | [a-z]+ | \.)', re.VERBOSE)
-
-    def __init__ (self, vstring=None):
-        if vstring:
-            self.parse(vstring)
-
-
-    def parse (self, vstring):
-        # I've given up on thinking I can reconstruct the version string
-        # from the parsed tuple -- so I just store the string here for
-        # use by __str__
-        self.vstring = vstring
-        components = [x for x in self.component_re.split(vstring)
-                              if x and x != '.']
-        for i, obj in enumerate(components):
-            try:
-                components[i] = int(obj)
-            except ValueError:
-                pass
-
-        self.version = components
-
-
-    def __str__ (self):
-        return self.vstring
-
-
-    def __repr__ (self):
-        return "LooseVersion ('%s')" % str(self)
-
-
-    def _cmp (self, other):
-        if isinstance(other, str):
-            other = LooseVersion(other)
-        elif not isinstance(other, LooseVersion):
-            return NotImplemented
-
-        if self.version == other.version:
-            return 0
-        if self.version < other.version:
-            return -1
-        if self.version > other.version:
-            return 1
-
-
-# end class LooseVersion
diff --git a/contrib/tools/python3/src/Lib/distutils/versionpredicate.py b/contrib/tools/python3/src/Lib/distutils/versionpredicate.py
deleted file mode 100644
index 062c98f248..0000000000
--- a/contrib/tools/python3/src/Lib/distutils/versionpredicate.py
+++ /dev/null
@@ -1,166 +0,0 @@
-"""Module for parsing and testing package version predicate strings.
-"""
-import re
-import distutils.version
-import operator
-
-
-re_validPackage = re.compile(r"(?i)^\s*([a-z_]\w*(?:\.[a-z_]\w*)*)(.*)",
-    re.ASCII)
-# (package) (rest)
-
-re_paren = re.compile(r"^\s*\((.*)\)\s*$") # (list) inside of parentheses
-re_splitComparison = re.compile(r"^\s*(<=|>=|<|>|!=|==)\s*([^\s,]+)\s*$")
-# (comp) (version)
-
-
-def splitUp(pred):
-    """Parse a single version comparison.
-
-    Return (comparison string, StrictVersion)
-    """
-    res = re_splitComparison.match(pred)
-    if not res:
-        raise ValueError("bad package restriction syntax: %r" % pred)
-    comp, verStr = res.groups()
-    return (comp, distutils.version.StrictVersion(verStr))
-
-compmap = {"<": operator.lt, "<=": operator.le, "==": operator.eq,
-           ">": operator.gt, ">=": operator.ge, "!=": operator.ne}
-
-class VersionPredicate:
-    """Parse and test package version predicates.
-
-    >>> v = VersionPredicate('pyepat.abc (>1.0, <3333.3a1, !=1555.1b3)')
-
-    The `name` attribute provides the full dotted name that is given::
-
-    >>> v.name
-    'pyepat.abc'
-
-    The str() of a `VersionPredicate` provides a normalized
-    human-readable version of the expression::
-
-    >>> print(v)
-    pyepat.abc (> 1.0, < 3333.3a1, != 1555.1b3)
-
-    The `satisfied_by()` method can be used to determine with a given
-    version number is included in the set described by the version
-    restrictions::
-
-    >>> v.satisfied_by('1.1')
-    True
-    >>> v.satisfied_by('1.4')
-    True
-    >>> v.satisfied_by('1.0')
-    False
-    >>> v.satisfied_by('4444.4')
-    False
-    >>> v.satisfied_by('1555.1b3')
-    False
-
-    `VersionPredicate` is flexible in accepting extra whitespace::
-
-    >>> v = VersionPredicate(' pat( ==  0.1  )  ')
-    >>> v.name
-    'pat'
-    >>> v.satisfied_by('0.1')
-    True
-    >>> v.satisfied_by('0.2')
-    False
-
-    If any version numbers passed in do not conform to the
-    restrictions of `StrictVersion`, a `ValueError` is raised::
-
-    >>> v = VersionPredicate('p1.p2.p3.p4(>=1.0, <=1.3a1, !=1.2zb3)')
-    Traceback (most recent call last):
-      ...
-    ValueError: invalid version number '1.2zb3'
-
-    It the module or package name given does not conform to what's
-    allowed as a legal module or package name, `ValueError` is
-    raised::
-
-    >>> v = VersionPredicate('foo-bar')
-    Traceback (most recent call last):
-      ...
-    ValueError: expected parenthesized list: '-bar'
-
-    >>> v = VersionPredicate('foo bar (12.21)')
-    Traceback (most recent call last):
-      ...
-    ValueError: expected parenthesized list: 'bar (12.21)'
-
-    """
-
-    def __init__(self, versionPredicateStr):
-        """Parse a version predicate string.
-        """
-        # Fields:
-        #    name:  package name
-        #    pred:  list of (comparison string, StrictVersion)
-
-        versionPredicateStr = versionPredicateStr.strip()
-        if not versionPredicateStr:
-            raise ValueError("empty package restriction")
-        match = re_validPackage.match(versionPredicateStr)
-        if not match:
-            raise ValueError("bad package name in %r" % versionPredicateStr)
-        self.name, paren = match.groups()
-        paren = paren.strip()
-        if paren:
-            match = re_paren.match(paren)
-            if not match:
-                raise ValueError("expected parenthesized list: %r" % paren)
-            str = match.groups()[0]
-            self.pred = [splitUp(aPred) for aPred in str.split(",")]
-            if not self.pred:
-                raise ValueError("empty parenthesized list in %r"
-                                 % versionPredicateStr)
-        else:
-            self.pred = []
-
-    def __str__(self):
-        if self.pred:
-            seq = [cond + " " + str(ver) for cond, ver in self.pred]
-            return self.name + " (" + ", ".join(seq) + ")"
-        else:
-            return self.name
-
-    def satisfied_by(self, version):
-        """True if version is compatible with all the predicates in self.
-        The parameter version must be acceptable to the StrictVersion
-        constructor.  It may be either a string or StrictVersion.
-        """
-        for cond, ver in self.pred:
-            if not compmap[cond](version, ver):
-                return False
-        return True
-
-
-_provision_rx = None
-
-def split_provision(value):
-    """Return the name and optional version number of a provision.
-
-    The version number, if given, will be returned as a `StrictVersion`
-    instance, otherwise it will be `None`.
-
-    >>> split_provision('mypkg')
-    ('mypkg', None)
-    >>> split_provision(' mypkg( 1.2 ) ')
-    ('mypkg', StrictVersion ('1.2'))
-    """
-    global _provision_rx
-    if _provision_rx is None:
-        _provision_rx = re.compile(
-            r"([a-zA-Z_]\w*(?:\.[a-zA-Z_]\w*)*)(?:\s*\(\s*([^)\s]+)\s*\))?$",
-            re.ASCII)
-    value = value.strip()
-    m = _provision_rx.match(value)
-    if not m:
-        raise ValueError("illegal provides specification: %r" % value)
-    ver = m.group(2) or None
-    if ver:
-        ver = distutils.version.StrictVersion(ver)
-    return m.group(1), ver
diff --git a/contrib/tools/python3/src/Lib/doctest.py b/contrib/tools/python3/src/Lib/doctest.py
index e39c1cdddc..087c52327f 100644
--- a/contrib/tools/python3/src/Lib/doctest.py
+++ b/contrib/tools/python3/src/Lib/doctest.py
@@ -207,7 +207,13 @@ def _normalize_module(module, depth=2):
     elif isinstance(module, str):
         return __import__(module, globals(), locals(), ["*"])
     elif module is None:
-        return sys.modules[sys._getframe(depth).f_globals['__name__']]
+        try:
+            try:
+                return sys.modules[sys._getframemodulename(depth)]
+            except AttributeError:
+                return sys.modules[sys._getframe(depth).f_globals['__name__']]
+        except KeyError:
+            pass
     else:
         raise TypeError("Expected a module, string, or None")
 
diff --git a/contrib/tools/python3/src/Lib/email/_header_value_parser.py b/contrib/tools/python3/src/Lib/email/_header_value_parser.py
index f4334f1fe6..5b653f66c1 100644
--- a/contrib/tools/python3/src/Lib/email/_header_value_parser.py
+++ b/contrib/tools/python3/src/Lib/email/_header_value_parser.py
@@ -1987,7 +1987,7 @@ def get_address_list(value):
         try:
             token, value = get_address(value)
             address_list.append(token)
-        except errors.HeaderParseError as err:
+        except errors.HeaderParseError:
             leader = None
             if value[0] in CFWS_LEADER:
                 leader, value = get_cfws(value)
@@ -2096,7 +2096,7 @@ def get_msg_id(value):
     except errors.HeaderParseError:
         try:
             token, value = get_no_fold_literal(value)
-        except errors.HeaderParseError as e:
+        except errors.HeaderParseError:
             try:
                 token, value = get_domain(value)
                 msg_id.defects.append(errors.ObsoleteHeaderDefect(
@@ -2443,7 +2443,6 @@ def get_parameter(value):
         raise errors.HeaderParseError("Parameter not followed by '='")
     param.append(ValueTerminal('=', 'parameter-separator'))
     value = value[1:]
-    leader = None
     if value and value[0] in CFWS_LEADER:
         token, value = get_cfws(value)
         param.append(token)
@@ -2568,7 +2567,7 @@ def parse_mime_parameters(value):
         try:
             token, value = get_parameter(value)
             mime_parameters.append(token)
-        except errors.HeaderParseError as err:
+        except errors.HeaderParseError:
             leader = None
             if value[0] in CFWS_LEADER:
                 leader, value = get_cfws(value)
@@ -2626,7 +2625,6 @@ def parse_content_type_header(value):
     don't do that.
     """
     ctype = ContentType()
-    recover = False
     if not value:
         ctype.defects.append(errors.HeaderMissingRequiredValue(
             "Missing content type specification"))
diff --git a/contrib/tools/python3/src/Lib/email/charset.py b/contrib/tools/python3/src/Lib/email/charset.py
index 1d4db7cd22..043801107b 100644
--- a/contrib/tools/python3/src/Lib/email/charset.py
+++ b/contrib/tools/python3/src/Lib/email/charset.py
@@ -109,8 +109,8 @@ def add_charset(charset, header_enc=None, body_enc=None, output_charset=None):
     charset is the input character set, and must be the canonical name of a
     character set.
 
-    Optional header_enc and body_enc is either Charset.QP for
-    quoted-printable, Charset.BASE64 for base64 encoding, Charset.SHORTEST for
+    Optional header_enc and body_enc is either charset.QP for
+    quoted-printable, charset.BASE64 for base64 encoding, charset.SHORTEST for
     the shortest of qp or base64 encoding, or None for no encoding.  SHORTEST
     is only valid for header_enc.  It describes how message headers and
     message bodies in the input charset are to be encoded.  Default is no
@@ -180,13 +180,13 @@ class Charset:
 
     header_encoding: If the character set must be encoded before it can be
                      used in an email header, this attribute will be set to
-                     Charset.QP (for quoted-printable), Charset.BASE64 (for
-                     base64 encoding), or Charset.SHORTEST for the shortest of
+                     charset.QP (for quoted-printable), charset.BASE64 (for
+                     base64 encoding), or charset.SHORTEST for the shortest of
                      QP or BASE64 encoding.  Otherwise, it will be None.
 
     body_encoding: Same as header_encoding, but describes the encoding for the
                    mail message's body, which indeed may be different than the
-                   header encoding.  Charset.SHORTEST is not allowed for
+                   header encoding.  charset.SHORTEST is not allowed for
                    body_encoding.
 
     output_charset: Some character sets must be converted before they can be
@@ -341,7 +341,6 @@ class Charset:
                 if not lines and not current_line:
                     lines.append(None)
                 else:
-                    separator = (' ' if lines else '')
                     joined_line = EMPTYSTRING.join(current_line)
                     header_bytes = _encode(joined_line, codec)
                     lines.append(encoder(header_bytes))
diff --git a/contrib/tools/python3/src/Lib/email/feedparser.py b/contrib/tools/python3/src/Lib/email/feedparser.py
index 89c739183c..c2881d9bc5 100644
--- a/contrib/tools/python3/src/Lib/email/feedparser.py
+++ b/contrib/tools/python3/src/Lib/email/feedparser.py
@@ -264,7 +264,7 @@ class FeedParser:
                         yield NeedMoreData
                         continue
                     break
-                msg = self._pop_message()
+                self._pop_message()
                 # We need to pop the EOF matcher in order to tell if we're at
                 # the end of the current file, not the end of the last block
                 # of message headers.
diff --git a/contrib/tools/python3/src/Lib/email/generator.py b/contrib/tools/python3/src/Lib/email/generator.py
index b8c10917a5..7ccbe10eb7 100644
--- a/contrib/tools/python3/src/Lib/email/generator.py
+++ b/contrib/tools/python3/src/Lib/email/generator.py
@@ -169,7 +169,7 @@ class Generator:
         # parameter.
         #
         # The way we do this, so as to make the _handle_*() methods simpler,
-        # is to cache any subpart writes into a buffer.  The we write the
+        # is to cache any subpart writes into a buffer.  Then we write the
         # headers and the buffer contents.  That way, subpart handlers can
         # Do The Right Thing, and can still modify the Content-Type: header if
         # necessary.
diff --git a/contrib/tools/python3/src/Lib/email/message.py b/contrib/tools/python3/src/Lib/email/message.py
index 4e9536b856..fe769580fe 100644
--- a/contrib/tools/python3/src/Lib/email/message.py
+++ b/contrib/tools/python3/src/Lib/email/message.py
@@ -14,7 +14,7 @@ from io import BytesIO, StringIO
 # Intrapackage imports
 from email import utils
 from email import errors
-from email._policybase import Policy, compat32
+from email._policybase import compat32
 from email import charset as _charset
 from email._encoded_words import decode_b
 Charset = _charset.Charset
@@ -449,7 +449,11 @@ class Message:
         self._headers = newheaders
 
     def __contains__(self, name):
-        return name.lower() in [k.lower() for k, v in self._headers]
+        name_lower = name.lower()
+        for k, v in self._headers:
+            if name_lower == k.lower():
+                return True
+        return False
 
     def __iter__(self):
         for field, value in self._headers:
diff --git a/contrib/tools/python3/src/Lib/email/mime/text.py b/contrib/tools/python3/src/Lib/email/mime/text.py
index dfe53c426b..7672b78913 100644
--- a/contrib/tools/python3/src/Lib/email/mime/text.py
+++ b/contrib/tools/python3/src/Lib/email/mime/text.py
@@ -6,7 +6,6 @@
 
 __all__ = ['MIMEText']
 
-from email.charset import Charset
 from email.mime.nonmultipart import MIMENonMultipart
 
 
@@ -36,6 +35,6 @@ class MIMEText(MIMENonMultipart):
                 _charset = 'utf-8'
 
         MIMENonMultipart.__init__(self, 'text', _subtype, policy=policy,
-                                  **{'charset': str(_charset)})
+                                  charset=str(_charset))
 
         self.set_payload(_text, _charset)
diff --git a/contrib/tools/python3/src/Lib/email/parser.py b/contrib/tools/python3/src/Lib/email/parser.py
index b1ca08d8f6..06d99b17f2 100644
--- a/contrib/tools/python3/src/Lib/email/parser.py
+++ b/contrib/tools/python3/src/Lib/email/parser.py
@@ -49,10 +49,7 @@ class Parser:
         feedparser = FeedParser(self._class, policy=self.policy)
         if headersonly:
             feedparser._set_headersonly()
-        while True:
-            data = fp.read(8192)
-            if not data:
-                break
+        while data := fp.read(8192):
             feedparser.feed(data)
         return feedparser.close()
 
diff --git a/contrib/tools/python3/src/Lib/email/utils.py b/contrib/tools/python3/src/Lib/email/utils.py
index 8993858ab4..aa949aa933 100644
--- a/contrib/tools/python3/src/Lib/email/utils.py
+++ b/contrib/tools/python3/src/Lib/email/utils.py
@@ -143,13 +143,13 @@ def formatdate(timeval=None, localtime=False, usegmt=False):
     # 2822 requires that day and month names be the English abbreviations.
     if timeval is None:
         timeval = time.time()
-    if localtime or usegmt:
-        dt = datetime.datetime.fromtimestamp(timeval, datetime.timezone.utc)
-    else:
-        dt = datetime.datetime.utcfromtimestamp(timeval)
+    dt = datetime.datetime.fromtimestamp(timeval, datetime.timezone.utc)
+
     if localtime:
         dt = dt.astimezone()
         usegmt = False
+    elif not usegmt:
+        dt = dt.replace(tzinfo=None)
     return format_datetime(dt, usegmt)
 
 def format_datetime(dt, usegmt=False):
@@ -331,41 +331,23 @@ def collapse_rfc2231_value(value, errors='replace',
 # better than not having it.
 #
 
-def localtime(dt=None, isdst=-1):
+def localtime(dt=None, isdst=None):
     """Return local time as an aware datetime object.
 
     If called without arguments, return current time.  Otherwise *dt*
     argument should be a datetime instance, and it is converted to the
     local time zone according to the system time zone database.  If *dt* is
     naive (that is, dt.tzinfo is None), it is assumed to be in local time.
-    In this case, a positive or zero value for *isdst* causes localtime to
-    presume initially that summer time (for example, Daylight Saving Time)
-    is or is not (respectively) in effect for the specified time.  A
-    negative value for *isdst* causes the localtime() function to attempt
-    to divine whether summer time is in effect for the specified time.
+    The isdst parameter is ignored.
 
     """
+    if isdst is not None:
+        import warnings
+        warnings._deprecated(
+            "The 'isdst' parameter to 'localtime'",
+            message='{name} is deprecated and slated for removal in Python {remove}',
+            remove=(3, 14),
+            )
     if dt is None:
-        return datetime.datetime.now(datetime.timezone.utc).astimezone()
-    if dt.tzinfo is not None:
-        return dt.astimezone()
-    # We have a naive datetime.  Convert to a (localtime) timetuple and pass to
-    # system mktime together with the isdst hint.  System mktime will return
-    # seconds since epoch.
-    tm = dt.timetuple()[:-1] + (isdst,)
-    seconds = time.mktime(tm)
-    localtm = time.localtime(seconds)
-    try:
-        delta = datetime.timedelta(seconds=localtm.tm_gmtoff)
-        tz = datetime.timezone(delta, localtm.tm_zone)
-    except AttributeError:
-        # Compute UTC offset and compare with the value implied by tm_isdst.
-        # If the values match, use the zone name implied by tm_isdst.
-        delta = dt - datetime.datetime(*time.gmtime(seconds)[:6])
-        dst = time.daylight and localtm.tm_isdst > 0
-        gmtoff = -(time.altzone if dst else time.timezone)
-        if delta == datetime.timedelta(seconds=gmtoff):
-            tz = datetime.timezone(delta, time.tzname[dst])
-        else:
-            tz = datetime.timezone(delta)
-    return dt.replace(tzinfo=tz)
+        dt = datetime.datetime.now()
+    return dt.astimezone()
diff --git a/contrib/tools/python3/src/Lib/encodings/idna.py b/contrib/tools/python3/src/Lib/encodings/idna.py
index bf98f51336..5396047a7f 100644
--- a/contrib/tools/python3/src/Lib/encodings/idna.py
+++ b/contrib/tools/python3/src/Lib/encodings/idna.py
@@ -101,6 +101,16 @@ def ToASCII(label):
     raise UnicodeError("label empty or too long")
 
 def ToUnicode(label):
+    if len(label) > 1024:
+        # Protection from https://github.com/python/cpython/issues/98433.
+        # https://datatracker.ietf.org/doc/html/rfc5894#section-6
+        # doesn't specify a label size limit prior to NAMEPREP. But having
+        # one makes practical sense.
+        # This leaves ample room for nameprep() to remove Nothing characters
+        # per https://www.rfc-editor.org/rfc/rfc3454#section-3.1 while still
+        # preventing us from wasting time decoding a big thing that'll just
+        # hit the actual <= 63 length limit in Step 6.
+        raise UnicodeError("label way too long")
     # Step 1: Check for ASCII
     if isinstance(label, bytes):
         pure_ascii = True
diff --git a/contrib/tools/python3/src/Lib/ensurepip/__init__.py b/contrib/tools/python3/src/Lib/ensurepip/__init__.py
index 165f3963a6..2ac872c25c 100644
--- a/contrib/tools/python3/src/Lib/ensurepip/__init__.py
+++ b/contrib/tools/python3/src/Lib/ensurepip/__init__.py
@@ -9,11 +9,9 @@ from importlib import resources
 
 
 __all__ = ["version", "bootstrap"]
-_PACKAGE_NAMES = ('setuptools', 'pip')
-_SETUPTOOLS_VERSION = "65.5.0"
+_PACKAGE_NAMES = ('pip',)
 _PIP_VERSION = "24.0"
 _PROJECTS = [
-    ("setuptools", _SETUPTOOLS_VERSION, "py3"),
     ("pip", _PIP_VERSION, "py3"),
 ]
 
@@ -153,17 +151,17 @@ def _bootstrap(*, root=None, upgrade=False, user=False,
 
     _disable_pip_configuration_settings()
 
-    # By default, installing pip and setuptools installs all of the
+    # By default, installing pip installs all of the
     # following scripts (X.Y == running Python version):
     #
-    #   pip, pipX, pipX.Y, easy_install, easy_install-X.Y
+    #   pip, pipX, pipX.Y
     #
     # pip 1.5+ allows ensurepip to request that some of those be left out
     if altinstall:
-        # omit pip, pipX and easy_install
+        # omit pip, pipX
         os.environ["ENSUREPIP_OPTIONS"] = "altinstall"
     elif not default_pip:
-        # omit pip and easy_install
+        # omit pip
         os.environ["ENSUREPIP_OPTIONS"] = "install"
 
     with tempfile.TemporaryDirectory() as tmpdir:
@@ -271,14 +269,14 @@ def _main(argv=None):
         action="store_true",
         default=False,
         help=("Make an alternate install, installing only the X.Y versioned "
-              "scripts (Default: pipX, pipX.Y, easy_install-X.Y)."),
+              "scripts (Default: pipX, pipX.Y)."),
     )
     parser.add_argument(
         "--default-pip",
         action="store_true",
         default=False,
         help=("Make a default pip install, installing the unqualified pip "
-              "and easy_install in addition to the versioned scripts."),
+              "in addition to the versioned scripts."),
     )
 
     args = parser.parse_args(argv)
diff --git a/contrib/tools/python3/src/Lib/enum.py b/contrib/tools/python3/src/Lib/enum.py
index 63833aaa71..1502bfe915 100644
--- a/contrib/tools/python3/src/Lib/enum.py
+++ b/contrib/tools/python3/src/Lib/enum.py
@@ -190,41 +190,48 @@ class property(DynamicClassAttribute):
     a corresponding enum member.
     """
 
+    member = None
+    _attr_type = None
+    _cls_type = None
+
     def __get__(self, instance, ownerclass=None):
         if instance is None:
-            try:
-                return ownerclass._member_map_[self.name]
-            except KeyError:
+            if self.member is not None:
+                return self.member
+            else:
                 raise AttributeError(
                         '%r has no attribute %r' % (ownerclass, self.name)
                         )
-        else:
-            if self.fget is None:
-                # look for a member by this name.
-                try:
-                    return ownerclass._member_map_[self.name]
-                except KeyError:
-                    raise AttributeError(
-                            '%r has no attribute %r' % (ownerclass, self.name)
-                            ) from None
-            else:
-                return self.fget(instance)
+        if self.fget is not None:
+            # use previous enum.property
+            return self.fget(instance)
+        elif self._attr_type == 'attr':
+            # look up previous attibute
+            return getattr(self._cls_type, self.name)
+        elif self._attr_type == 'desc':
+            # use previous descriptor
+            return getattr(instance._value_, self.name)
+        # look for a member by this name.
+        try:
+            return ownerclass._member_map_[self.name]
+        except KeyError:
+            raise AttributeError(
+                    '%r has no attribute %r' % (ownerclass, self.name)
+                    ) from None
 
     def __set__(self, instance, value):
-        if self.fset is None:
-            raise AttributeError(
-                    "<enum %r> cannot set attribute %r" % (self.clsname, self.name)
-                    )
-        else:
+        if self.fset is not None:
             return self.fset(instance, value)
+        raise AttributeError(
+                "<enum %r> cannot set attribute %r" % (self.clsname, self.name)
+                )
 
     def __delete__(self, instance):
-        if self.fdel is None:
-            raise AttributeError(
-                    "<enum %r> cannot delete attribute %r" % (self.clsname, self.name)
-                    )
-        else:
+        if self.fdel is not None:
             return self.fdel(instance)
+        raise AttributeError(
+                "<enum %r> cannot delete attribute %r" % (self.clsname, self.name)
+                )
 
     def __set_name__(self, ownerclass, name):
         self.name = name
@@ -312,27 +319,38 @@ class _proto_member:
                 enum_class._member_names_.append(member_name)
         # if necessary, get redirect in place and then add it to _member_map_
         found_descriptor = None
+        descriptor_type = None
+        class_type = None
         for base in enum_class.__mro__[1:]:
-            descriptor = base.__dict__.get(member_name)
-            if descriptor is not None:
-                if isinstance(descriptor, (property, DynamicClassAttribute)):
-                    found_descriptor = descriptor
+            attr = base.__dict__.get(member_name)
+            if attr is not None:
+                if isinstance(attr, (property, DynamicClassAttribute)):
+                    found_descriptor = attr
+                    class_type = base
+                    descriptor_type = 'enum'
                     break
-                elif (
-                        hasattr(descriptor, 'fget') and
-                        hasattr(descriptor, 'fset') and
-                        hasattr(descriptor, 'fdel')
-                    ):
-                    found_descriptor = descriptor
+                elif _is_descriptor(attr):
+                    found_descriptor = attr
+                    descriptor_type = descriptor_type or 'desc'
+                    class_type = class_type or base
                     continue
+                else:
+                    descriptor_type = 'attr'
+                    class_type = base
         if found_descriptor:
             redirect = property()
             redirect.member = enum_member
             redirect.__set_name__(enum_class, member_name)
-            # earlier descriptor found; copy fget, fset, fdel to this one.
-            redirect.fget = found_descriptor.fget
-            redirect.fset = found_descriptor.fset
-            redirect.fdel = found_descriptor.fdel
+            if descriptor_type in ('enum','desc'):
+                # earlier descriptor found; copy fget, fset, fdel to this one.
+                redirect.fget = getattr(found_descriptor, 'fget', None)
+                redirect._get = getattr(found_descriptor, '__get__', None)
+                redirect.fset = getattr(found_descriptor, 'fset', None)
+                redirect._set = getattr(found_descriptor, '__set__', None)
+                redirect.fdel = getattr(found_descriptor, 'fdel', None)
+                redirect._del = getattr(found_descriptor, '__delete__', None)
+            redirect._attr_type = descriptor_type
+            redirect._cls_type = class_type
             setattr(enum_class, member_name, redirect)
         else:
             setattr(enum_class, member_name, enum_member)
@@ -521,8 +539,13 @@ class EnumType(type):
         #
         # adjust the sunders
         _order_ = classdict.pop('_order_', None)
+        _gnv = classdict.get('_generate_next_value_')
+        if _gnv is not None and type(_gnv) is not staticmethod:
+            _gnv = staticmethod(_gnv)
         # convert to normal dict
         classdict = dict(classdict.items())
+        if _gnv is not None:
+            classdict['_generate_next_value_'] = _gnv
         #
         # data type of member and the controlling Enum class
         member_type, first_enum = metacls._get_mixins_(cls, bases)
@@ -558,12 +581,16 @@ class EnumType(type):
         try:
             exc = None
             enum_class = super().__new__(metacls, cls, bases, classdict, **kwds)
-        except RuntimeError as e:
-            # any exceptions raised by member.__new__ will get converted to a
-            # RuntimeError, so get that original exception back and raise it instead
-            exc = e.__cause__ or e
+        except Exception as e:
+            # since 3.12 the line "Error calling __set_name__ on '_proto_member' instance ..."
+            # is tacked on to the error instead of raising a RuntimeError
+            # recreate the exception to discard
+            exc = type(e)(str(e))
+            exc.__cause__ = e.__cause__
+            exc.__context__ = e.__context__
+            tb = e.__traceback__
         if exc is not None:
-            raise exc
+            raise exc.with_traceback(tb)
         #
         # update classdict with any changes made by __init_subclass__
         classdict.update(enum_class.__dict__)
@@ -674,7 +701,7 @@ class EnumType(type):
                         'member order does not match _order_:\n  %r\n  %r'
                         % (enum_class._member_names_, _order_)
                         )
-
+        #
         return enum_class
 
     def __bool__(cls):
@@ -683,7 +710,7 @@ class EnumType(type):
         """
         return True
 
-    def __call__(cls, value, names=None, *, module=None, qualname=None, type=None, start=1, boundary=None):
+    def __call__(cls, value, names=None, *values, module=None, qualname=None, type=None, start=1, boundary=None):
         """
         Either returns an existing member, or creates a new enum class.
 
@@ -691,6 +718,8 @@ class EnumType(type):
         to an enumeration member (i.e. Color(3)) and for the functional API
         (i.e. Color = Enum('Color', names='RED GREEN BLUE')).
 
+        The value lookup branch is chosen if the enum is final.
+
         When used for the functional API:
 
         `value` will be the name of the new class.
@@ -708,12 +737,20 @@ class EnumType(type):
 
         `type`, if set, will be mixed in as the first base class.
         """
-        if names is None:  # simple value lookup
+        if cls._member_map_:
+            # simple value lookup if members exist
+            if names:
+                value = (value, names) + values
             return cls.__new__(cls, value)
         # otherwise, functional API: we're creating a new Enum type
+        if names is None and type is None:
+            # no body? no data-type? possibly wrong usage
+            raise TypeError(
+                    f"{cls} has no members; specify `names=()` if you meant to create a new, empty, enum"
+                    )
         return cls._create_(
-                value,
-                names,
+                class_name=value,
+                names=names,
                 module=module,
                 qualname=qualname,
                 type=type,
@@ -721,26 +758,16 @@ class EnumType(type):
                 boundary=boundary,
                 )
 
-    def __contains__(cls, member):
-        """
-        Return True if member is a member of this enum
-        raises TypeError if member is not an enum member
+    def __contains__(cls, value):
+        """Return True if `value` is in `cls`.
 
-        note: in 3.12 TypeError will no longer be raised, and True will also be
-        returned if member is the value of a member in this enum
+        `value` is in `cls` if:
+        1) `value` is a member of `cls`, or
+        2) `value` is the value of one of the `cls`'s members.
         """
-        if not isinstance(member, Enum):
-            import warnings
-            warnings.warn(
-                    "in 3.12 __contains__ will no longer raise TypeError, but will return True or\n"
-                    "False depending on whether the value is a member or the value of a member",
-                    DeprecationWarning,
-                    stacklevel=2,
-                    )
-            raise TypeError(
-                "unsupported operand type(s) for 'in': '%s' and '%s'" % (
-                    type(member).__qualname__, cls.__class__.__qualname__))
-        return isinstance(member, cls) and member._name_ in cls._member_map_
+        if isinstance(value, cls):
+            return True
+        return value in cls._value2member_map_ or value in cls._unhashable_values_
 
     def __delattr__(cls, attr):
         # nicer error message when someone tries to delete an attribute
@@ -767,22 +794,6 @@ class EnumType(type):
             # return whatever mixed-in data type has
             return sorted(set(dir(cls._member_type_)) | interesting)
 
-    def __getattr__(cls, name):
-        """
-        Return the enum member matching `name`
-
-        We use __getattr__ instead of descriptors or inserting into the enum
-        class' __dict__ in order to support `name` and `value` being both
-        properties for enum members (which live in the class' __dict__) and
-        enum members themselves.
-        """
-        if _is_dunder(name):
-            raise AttributeError(name)
-        try:
-            return cls._member_map_[name]
-        except KeyError:
-            raise AttributeError(name) from None
-
     def __getitem__(cls, name):
         """
         Return the member matching `name`.
@@ -874,13 +885,15 @@ class EnumType(type):
                 member_name, member_value = item
             classdict[member_name] = member_value
 
-        # TODO: replace the frame hack if a blessed way to know the calling
-        # module is ever developed
         if module is None:
             try:
-                module = sys._getframe(2).f_globals['__name__']
-            except (AttributeError, ValueError, KeyError):
-                pass
+                module = sys._getframemodulename(2)
+            except AttributeError:
+                # Fall back on _getframe if _getframemodulename is missing
+                try:
+                    module = sys._getframe(2).f_globals['__name__']
+                except (AttributeError, ValueError, KeyError):
+                    pass
         if module is None:
             _make_class_unpicklable(classdict)
         else:
@@ -948,9 +961,6 @@ class EnumType(type):
         """
         if not bases:
             return object, Enum
-
-        mcls._check_for_existing_members_(class_name, bases)
-
         # ensure final parent class is an Enum derivative, find any concrete
         # data type, and check that Enum has no members
         first_enum = bases[-1]
@@ -971,12 +981,20 @@ class EnumType(type):
                     return base._value_repr_
                 elif '__repr__' in base.__dict__:
                     # this is our data repr
-                    return base.__dict__['__repr__']
+                    # double-check if a dataclass with a default __repr__
+                    if (
+                            '__dataclass_fields__' in base.__dict__
+                            and '__dataclass_params__' in base.__dict__
+                            and base.__dict__['__dataclass_params__'].repr
+                        ):
+                        return _dataclass_repr
+                    else:
+                        return base.__dict__['__repr__']
         return None
 
     @classmethod
     def _find_data_type_(mcls, class_name, bases):
-        # a datatype has a __new__ method
+        # a datatype has a __new__ method, or a __dataclass_fields__ attribute
         data_types = set()
         base_chain = set()
         for chain in bases:
@@ -990,8 +1008,6 @@ class EnumType(type):
                         data_types.add(base._member_type_)
                         break
                 elif '__new__' in base.__dict__ or '__dataclass_fields__' in base.__dict__:
-                    if isinstance(base, EnumType):
-                        continue
                     data_types.add(candidate or base)
                     break
                 else:
@@ -1063,20 +1079,20 @@ class Enum(metaclass=EnumType):
 
     Access them by:
 
-    - attribute access::
+    - attribute access:
 
-    >>> Color.RED
-    <Color.RED: 1>
+      >>> Color.RED
+      <Color.RED: 1>
 
     - value lookup:
 
-    >>> Color(1)
-    <Color.RED: 1>
+      >>> Color(1)
+      <Color.RED: 1>
 
     - name lookup:
 
-    >>> Color['RED']
-    <Color.RED: 1>
+      >>> Color['RED']
+      <Color.RED: 1>
 
     Enumerations can be iterated over, and know how many members they have:
 
@@ -1090,6 +1106,13 @@ class Enum(metaclass=EnumType):
     attributes -- see the documentation for details.
     """
 
+    @classmethod
+    def __signature__(cls):
+        if cls._member_names_:
+            return '(*values)'
+        else:
+            return '(new_class_name, /, names, *, module=None, qualname=None, type=None, start=1, boundary=None)'
+
     def __new__(cls, value):
         # all enum instances are actually created during class construction
         # without calling this method; this method is called by the metaclass'
@@ -1149,6 +1172,7 @@ class Enum(metaclass=EnumType):
     def __init__(self, *args, **kwds):
         pass
 
+    @staticmethod
     def _generate_next_value_(name, start, count, last_values):
         """
         Generate the next value when not given.
@@ -1242,10 +1266,10 @@ class Enum(metaclass=EnumType):
     # enum.property is used to provide access to the `name` and
     # `value` attributes of enum members while keeping some measure of
     # protection from modification, while still allowing for an enumeration
-    # to have members named `name` and `value`.  This works because enumeration
-    # members are not set directly on the enum class; they are kept in a
-    # separate structure, _member_map_, which is where enum.property looks for
-    # them
+    # to have members named `name` and `value`.  This works because each
+    # instance of enum.property saves its companion member, which it returns
+    # on class lookup; on instance lookup it either executes a provided function
+    # or raises an AttributeError.
 
     @property
     def name(self):
@@ -1296,6 +1320,7 @@ class StrEnum(str, ReprEnum):
         member._value_ = value
         return member
 
+    @staticmethod
     def _generate_next_value_(name, start, count, last_values):
         """
         Return the lower-cased version of the member name.
@@ -1334,6 +1359,7 @@ class Flag(Enum, boundary=STRICT):
 
     _numeric_repr_ = repr
 
+    @staticmethod
     def _generate_next_value_(name, start, count, last_values):
         """
         Generate the next value when not given.
@@ -1572,10 +1598,13 @@ def unique(enumeration):
                 (enumeration, alias_details))
     return enumeration
 
-def _power_of_two(value):
-    if value < 1:
-        return False
-    return value == 2 ** _high_bit(value)
+def _dataclass_repr(self):
+    dcf = self.__dataclass_fields__
+    return ', '.join(
+            '%s=%r' % (k, getattr(self, k))
+            for k in dcf.keys()
+            if dcf[k].repr
+            )
 
 def global_enum_repr(self):
     """
@@ -1719,10 +1748,12 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
                     value = gnv(name, 1, len(member_names), gnv_last_values)
                 if value in value2member_map:
                     # an alias to an existing member
+                    member = value2member_map[value]
                     redirect = property()
+                    redirect.member = member
                     redirect.__set_name__(enum_class, name)
                     setattr(enum_class, name, redirect)
-                    member_map[name] = value2member_map[value]
+                    member_map[name] = member
                 else:
                     # create the member
                     if use_args:
@@ -1738,6 +1769,7 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
                     member.__objclass__ = enum_class
                     member.__init__(value)
                     redirect = property()
+                    redirect.member = member
                     redirect.__set_name__(enum_class, name)
                     setattr(enum_class, name, redirect)
                     member_map[name] = member
@@ -1766,10 +1798,12 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
                     value = value.value
                 if value in value2member_map:
                     # an alias to an existing member
+                    member = value2member_map[value]
                     redirect = property()
+                    redirect.member = member
                     redirect.__set_name__(enum_class, name)
                     setattr(enum_class, name, redirect)
-                    member_map[name] = value2member_map[value]
+                    member_map[name] = member
                 else:
                     # create the member
                     if use_args:
@@ -1786,6 +1820,7 @@ def _simple_enum(etype=Enum, *, boundary=None, use_args=None):
                     member.__init__(value)
                     member._sort_order_ = len(member_names)
                     redirect = property()
+                    redirect.member = member
                     redirect.__set_name__(enum_class, name)
                     setattr(enum_class, name, redirect)
                     member_map[name] = member
diff --git a/contrib/tools/python3/src/Lib/filecmp.py b/contrib/tools/python3/src/Lib/filecmp.py
index 70a4b23c98..30bd900fa8 100644
--- a/contrib/tools/python3/src/Lib/filecmp.py
+++ b/contrib/tools/python3/src/Lib/filecmp.py
@@ -157,17 +157,17 @@ class dircmp:
             a_path = os.path.join(self.left, x)
             b_path = os.path.join(self.right, x)
 
-            ok = 1
+            ok = True
             try:
                 a_stat = os.stat(a_path)
             except OSError:
                 # print('Can\'t stat', a_path, ':', why.args[1])
-                ok = 0
+                ok = False
             try:
                 b_stat = os.stat(b_path)
             except OSError:
                 # print('Can\'t stat', b_path, ':', why.args[1])
-                ok = 0
+                ok = False
 
             if ok:
                 a_type = stat.S_IFMT(a_stat.st_mode)
@@ -242,7 +242,7 @@ class dircmp:
 
     methodmap = dict(subdirs=phase4,
                      same_files=phase3, diff_files=phase3, funny_files=phase3,
-                     common_dirs = phase2, common_files=phase2, common_funny=phase2,
+                     common_dirs=phase2, common_files=phase2, common_funny=phase2,
                      common=phase1, left_only=phase1, right_only=phase1,
                      left_list=phase0, right_list=phase0)
 
diff --git a/contrib/tools/python3/src/Lib/fractions.py b/contrib/tools/python3/src/Lib/fractions.py
index a7a7fea5ca..88b418fe38 100644
--- a/contrib/tools/python3/src/Lib/fractions.py
+++ b/contrib/tools/python3/src/Lib/fractions.py
@@ -4,6 +4,7 @@
 """Fraction, infinite-precision, rational numbers."""
 
 from decimal import Decimal
+import functools
 import math
 import numbers
 import operator
@@ -20,13 +21,46 @@ _PyHASH_MODULUS = sys.hash_info.modulus
 # _PyHASH_MODULUS.
 _PyHASH_INF = sys.hash_info.inf
 
+@functools.lru_cache(maxsize = 1 << 14)
+def _hash_algorithm(numerator, denominator):
+
+    # To make sure that the hash of a Fraction agrees with the hash
+    # of a numerically equal integer, float or Decimal instance, we
+    # follow the rules for numeric hashes outlined in the
+    # documentation.  (See library docs, 'Built-in Types').
+
+    try:
+        dinv = pow(denominator, -1, _PyHASH_MODULUS)
+    except ValueError:
+        # ValueError means there is no modular inverse.
+        hash_ = _PyHASH_INF
+    else:
+        # The general algorithm now specifies that the absolute value of
+        # the hash is
+        #    (|N| * dinv) % P
+        # where N is self._numerator and P is _PyHASH_MODULUS.  That's
+        # optimized here in two ways:  first, for a non-negative int i,
+        # hash(i) == i % P, but the int hash implementation doesn't need
+        # to divide, and is faster than doing % P explicitly.  So we do
+        #    hash(|N| * dinv)
+        # instead.  Second, N is unbounded, so its product with dinv may
+        # be arbitrarily expensive to compute.  The final answer is the
+        # same if we use the bounded |N| % P instead, which can again
+        # be done with an int hash() call.  If 0 <= i < P, hash(i) == i,
+        # so this nested hash() call wastes a bit of time making a
+        # redundant copy when |N| < P, but can save an arbitrarily large
+        # amount of computation for large |N|.
+        hash_ = hash(hash(abs(numerator)) * dinv)
+    result = hash_ if numerator >= 0 else -hash_
+    return -2 if result == -1 else result
+
 _RATIONAL_FORMAT = re.compile(r"""
     \A\s*                                  # optional whitespace at the start,
     (?P<sign>[-+]?)                        # an optional sign, then
     (?=\d|\.\d)                            # lookahead for digit or .digit
     (?P<num>\d*|\d+(_\d+)*)                # numerator (possibly empty)
     (?:                                    # followed by
-       (?:/(?P<denom>\d+(_\d+)*))?         # an optional denominator
+       (?:\s*/\s*(?P<denom>\d+(_\d+)*))?   # an optional denominator
     |                                      # or
        (?:\.(?P<decimal>\d*|\d+(_\d+)*))?  # an optional fractional part
        (?:E(?P<exp>[-+]?\d+(_\d+)*))?      # and optional exponent
@@ -35,6 +69,96 @@ _RATIONAL_FORMAT = re.compile(r"""
 """, re.VERBOSE | re.IGNORECASE)
 
 
+# Helpers for formatting
+
+def _round_to_exponent(n, d, exponent, no_neg_zero=False):
+    """Round a rational number to the nearest multiple of a given power of 10.
+
+    Rounds the rational number n/d to the nearest integer multiple of
+    10**exponent, rounding to the nearest even integer multiple in the case of
+    a tie. Returns a pair (sign: bool, significand: int) representing the
+    rounded value (-1)**sign * significand * 10**exponent.
+
+    If no_neg_zero is true, then the returned sign will always be False when
+    the significand is zero. Otherwise, the sign reflects the sign of the
+    input.
+
+    d must be positive, but n and d need not be relatively prime.
+    """
+    if exponent >= 0:
+        d *= 10**exponent
+    else:
+        n *= 10**-exponent
+
+    # The divmod quotient is correct for round-ties-towards-positive-infinity;
+    # In the case of a tie, we zero out the least significant bit of q.
+    q, r = divmod(n + (d >> 1), d)
+    if r == 0 and d & 1 == 0:
+        q &= -2
+
+    sign = q < 0 if no_neg_zero else n < 0
+    return sign, abs(q)
+
+
+def _round_to_figures(n, d, figures):
+    """Round a rational number to a given number of significant figures.
+
+    Rounds the rational number n/d to the given number of significant figures
+    using the round-ties-to-even rule, and returns a triple
+    (sign: bool, significand: int, exponent: int) representing the rounded
+    value (-1)**sign * significand * 10**exponent.
+
+    In the special case where n = 0, returns a significand of zero and
+    an exponent of 1 - figures, for compatibility with formatting.
+    Otherwise, the returned significand satisfies
+    10**(figures - 1) <= significand < 10**figures.
+
+    d must be positive, but n and d need not be relatively prime.
+    figures must be positive.
+    """
+    # Special case for n == 0.
+    if n == 0:
+        return False, 0, 1 - figures
+
+    # Find integer m satisfying 10**(m - 1) <= abs(n)/d <= 10**m. (If abs(n)/d
+    # is a power of 10, either of the two possible values for m is fine.)
+    str_n, str_d = str(abs(n)), str(d)
+    m = len(str_n) - len(str_d) + (str_d <= str_n)
+
+    # Round to a multiple of 10**(m - figures). The significand we get
+    # satisfies 10**(figures - 1) <= significand <= 10**figures.
+    exponent = m - figures
+    sign, significand = _round_to_exponent(n, d, exponent)
+
+    # Adjust in the case where significand == 10**figures, to ensure that
+    # 10**(figures - 1) <= significand < 10**figures.
+    if len(str(significand)) == figures + 1:
+        significand //= 10
+        exponent += 1
+
+    return sign, significand, exponent
+
+
+# Pattern for matching float-style format specifications;
+# supports 'e', 'E', 'f', 'F', 'g', 'G' and '%' presentation types.
+_FLOAT_FORMAT_SPECIFICATION_MATCHER = re.compile(r"""
+    (?:
+        (?P<fill>.)?
+        (?P<align>[<>=^])
+    )?
+    (?P<sign>[-+ ]?)
+    (?P<no_neg_zero>z)?
+    (?P<alt>\#)?
+    # A '0' that's *not* followed by another digit is parsed as a minimum width
+    # rather than a zeropad flag.
+    (?P<zeropad>0(?=[0-9]))?
+    (?P<minimumwidth>0|[1-9][0-9]*)?
+    (?P<thousands_sep>[,_])?
+    (?:\.(?P<precision>0|[1-9][0-9]*))?
+    (?P<presentation_type>[eEfFgG%])
+""", re.DOTALL | re.VERBOSE).fullmatch
+
+
 class Fraction(numbers.Rational):
     """This class implements rational numbers.
 
@@ -59,7 +183,7 @@ class Fraction(numbers.Rational):
     __slots__ = ('_numerator', '_denominator')
 
     # We're immutable, so use __new__ not __init__
-    def __new__(cls, numerator=0, denominator=None, *, _normalize=True):
+    def __new__(cls, numerator=0, denominator=None):
         """Constructs a Rational.
 
         Takes a string like '3/2' or '1.5', another Rational instance, a
@@ -155,12 +279,11 @@ class Fraction(numbers.Rational):
 
         if denominator == 0:
             raise ZeroDivisionError('Fraction(%s, 0)' % numerator)
-        if _normalize:
-            g = math.gcd(numerator, denominator)
-            if denominator < 0:
-                g = -g
-            numerator //= g
-            denominator //= g
+        g = math.gcd(numerator, denominator)
+        if denominator < 0:
+            g = -g
+        numerator //= g
+        denominator //= g
         self._numerator = numerator
         self._denominator = denominator
         return self
@@ -177,7 +300,7 @@ class Fraction(numbers.Rational):
         elif not isinstance(f, float):
             raise TypeError("%s.from_float() only takes floats, not %r (%s)" %
                             (cls.__name__, f, type(f).__name__))
-        return cls(*f.as_integer_ratio())
+        return cls._from_coprime_ints(*f.as_integer_ratio())
 
     @classmethod
     def from_decimal(cls, dec):
@@ -189,13 +312,28 @@ class Fraction(numbers.Rational):
             raise TypeError(
                 "%s.from_decimal() only takes Decimals, not %r (%s)" %
                 (cls.__name__, dec, type(dec).__name__))
-        return cls(*dec.as_integer_ratio())
+        return cls._from_coprime_ints(*dec.as_integer_ratio())
+
+    @classmethod
+    def _from_coprime_ints(cls, numerator, denominator, /):
+        """Convert a pair of ints to a rational number, for internal use.
+
+        The ratio of integers should be in lowest terms and the denominator
+        should be positive.
+        """
+        obj = super(Fraction, cls).__new__(cls)
+        obj._numerator = numerator
+        obj._denominator = denominator
+        return obj
+
+    def is_integer(self):
+        """Return True if the Fraction is an integer."""
+        return self._denominator == 1
 
     def as_integer_ratio(self):
-        """Return the integer ratio as a tuple.
+        """Return a pair of integers, whose ratio is equal to the original Fraction.
 
-        Return a tuple of two integers, whose ratio is equal to the
-        Fraction and with a positive denominator.
+        The ratio is in lowest terms and has a positive denominator.
         """
         return (self._numerator, self._denominator)
 
@@ -245,14 +383,16 @@ class Fraction(numbers.Rational):
                 break
             p0, q0, p1, q1 = p1, q1, p0+a*p1, q2
             n, d = d, n-a*d
-
         k = (max_denominator-q0)//q1
-        bound1 = Fraction(p0+k*p1, q0+k*q1)
-        bound2 = Fraction(p1, q1)
-        if abs(bound2 - self) <= abs(bound1-self):
-            return bound2
+
+        # Determine which of the candidates (p0+k*p1)/(q0+k*q1) and p1/q1 is
+        # closer to self. The distance between them is 1/(q1*(q0+k*q1)), while
+        # the distance from p1/q1 to self is d/(q1*self._denominator). So we
+        # need to compare 2*(q0+k*q1) with self._denominator/d.
+        if 2*d*(q0+k*q1) <= self._denominator:
+            return Fraction._from_coprime_ints(p1, q1)
         else:
-            return bound1
+            return Fraction._from_coprime_ints(p0+k*p1, q0+k*q1)
 
     @property
     def numerator(a):
@@ -274,6 +414,122 @@ class Fraction(numbers.Rational):
         else:
             return '%s/%s' % (self._numerator, self._denominator)
 
+    def __format__(self, format_spec, /):
+        """Format this fraction according to the given format specification."""
+
+        # Backwards compatiblility with existing formatting.
+        if not format_spec:
+            return str(self)
+
+        # Validate and parse the format specifier.
+        match = _FLOAT_FORMAT_SPECIFICATION_MATCHER(format_spec)
+        if match is None:
+            raise ValueError(
+                f"Invalid format specifier {format_spec!r} "
+                f"for object of type {type(self).__name__!r}"
+            )
+        elif match["align"] is not None and match["zeropad"] is not None:
+            # Avoid the temptation to guess.
+            raise ValueError(
+                f"Invalid format specifier {format_spec!r} "
+                f"for object of type {type(self).__name__!r}; "
+                "can't use explicit alignment when zero-padding"
+            )
+        fill = match["fill"] or " "
+        align = match["align"] or ">"
+        pos_sign = "" if match["sign"] == "-" else match["sign"]
+        no_neg_zero = bool(match["no_neg_zero"])
+        alternate_form = bool(match["alt"])
+        zeropad = bool(match["zeropad"])
+        minimumwidth = int(match["minimumwidth"] or "0")
+        thousands_sep = match["thousands_sep"]
+        precision = int(match["precision"] or "6")
+        presentation_type = match["presentation_type"]
+        trim_zeros = presentation_type in "gG" and not alternate_form
+        trim_point = not alternate_form
+        exponent_indicator = "E" if presentation_type in "EFG" else "e"
+
+        # Round to get the digits we need, figure out where to place the point,
+        # and decide whether to use scientific notation. 'point_pos' is the
+        # relative to the _end_ of the digit string: that is, it's the number
+        # of digits that should follow the point.
+        if presentation_type in "fF%":
+            exponent = -precision
+            if presentation_type == "%":
+                exponent -= 2
+            negative, significand = _round_to_exponent(
+                self._numerator, self._denominator, exponent, no_neg_zero)
+            scientific = False
+            point_pos = precision
+        else:  # presentation_type in "eEgG"
+            figures = (
+                max(precision, 1)
+                if presentation_type in "gG"
+                else precision + 1
+            )
+            negative, significand, exponent = _round_to_figures(
+                self._numerator, self._denominator, figures)
+            scientific = (
+                presentation_type in "eE"
+                or exponent > 0
+                or exponent + figures <= -4
+            )
+            point_pos = figures - 1 if scientific else -exponent
+
+        # Get the suffix - the part following the digits, if any.
+        if presentation_type == "%":
+            suffix = "%"
+        elif scientific:
+            suffix = f"{exponent_indicator}{exponent + point_pos:+03d}"
+        else:
+            suffix = ""
+
+        # String of output digits, padded sufficiently with zeros on the left
+        # so that we'll have at least one digit before the decimal point.
+        digits = f"{significand:0{point_pos + 1}d}"
+
+        # Before padding, the output has the form f"{sign}{leading}{trailing}",
+        # where `leading` includes thousands separators if necessary and
+        # `trailing` includes the decimal separator where appropriate.
+        sign = "-" if negative else pos_sign
+        leading = digits[: len(digits) - point_pos]
+        frac_part = digits[len(digits) - point_pos :]
+        if trim_zeros:
+            frac_part = frac_part.rstrip("0")
+        separator = "" if trim_point and not frac_part else "."
+        trailing = separator + frac_part + suffix
+
+        # Do zero padding if required.
+        if zeropad:
+            min_leading = minimumwidth - len(sign) - len(trailing)
+            # When adding thousands separators, they'll be added to the
+            # zero-padded portion too, so we need to compensate.
+            leading = leading.zfill(
+                3 * min_leading // 4 + 1 if thousands_sep else min_leading
+            )
+
+        # Insert thousands separators if required.
+        if thousands_sep:
+            first_pos = 1 + (len(leading) - 1) % 3
+            leading = leading[:first_pos] + "".join(
+                thousands_sep + leading[pos : pos + 3]
+                for pos in range(first_pos, len(leading), 3)
+            )
+
+        # We now have a sign and a body. Pad with fill character if necessary
+        # and return.
+        body = leading + trailing
+        padding = fill * (minimumwidth - len(sign) - len(body))
+        if align == ">":
+            return padding + sign + body
+        elif align == "<":
+            return sign + body + padding
+        elif align == "^":
+            half = len(padding) // 2
+            return padding[:half] + sign + body + padding[half:]
+        else:  # align == "="
+            return sign + padding + body
+
     def _operator_fallbacks(monomorphic_operator, fallback_operator):
         """Generates forward and reverse operators given a purely-rational
         operator and a function from the operator module.
@@ -355,8 +611,10 @@ class Fraction(numbers.Rational):
 
         """
         def forward(a, b):
-            if isinstance(b, (int, Fraction)):
+            if isinstance(b, Fraction):
                 return monomorphic_operator(a, b)
+            elif isinstance(b, int):
+                return monomorphic_operator(a, Fraction(b))
             elif isinstance(b, float):
                 return fallback_operator(float(a), b)
             elif isinstance(b, complex):
@@ -369,7 +627,7 @@ class Fraction(numbers.Rational):
         def reverse(b, a):
             if isinstance(a, numbers.Rational):
                 # Includes ints.
-                return monomorphic_operator(a, b)
+                return monomorphic_operator(Fraction(a), b)
             elif isinstance(a, numbers.Real):
                 return fallback_operator(float(a), float(b))
             elif isinstance(a, numbers.Complex):
@@ -451,40 +709,40 @@ class Fraction(numbers.Rational):
 
     def _add(a, b):
         """a + b"""
-        na, da = a.numerator, a.denominator
-        nb, db = b.numerator, b.denominator
+        na, da = a._numerator, a._denominator
+        nb, db = b._numerator, b._denominator
         g = math.gcd(da, db)
         if g == 1:
-            return Fraction(na * db + da * nb, da * db, _normalize=False)
+            return Fraction._from_coprime_ints(na * db + da * nb, da * db)
         s = da // g
         t = na * (db // g) + nb * s
         g2 = math.gcd(t, g)
         if g2 == 1:
-            return Fraction(t, s * db, _normalize=False)
-        return Fraction(t // g2, s * (db // g2), _normalize=False)
+            return Fraction._from_coprime_ints(t, s * db)
+        return Fraction._from_coprime_ints(t // g2, s * (db // g2))
 
     __add__, __radd__ = _operator_fallbacks(_add, operator.add)
 
     def _sub(a, b):
         """a - b"""
-        na, da = a.numerator, a.denominator
-        nb, db = b.numerator, b.denominator
+        na, da = a._numerator, a._denominator
+        nb, db = b._numerator, b._denominator
         g = math.gcd(da, db)
         if g == 1:
-            return Fraction(na * db - da * nb, da * db, _normalize=False)
+            return Fraction._from_coprime_ints(na * db - da * nb, da * db)
         s = da // g
         t = na * (db // g) - nb * s
         g2 = math.gcd(t, g)
         if g2 == 1:
-            return Fraction(t, s * db, _normalize=False)
-        return Fraction(t // g2, s * (db // g2), _normalize=False)
+            return Fraction._from_coprime_ints(t, s * db)
+        return Fraction._from_coprime_ints(t // g2, s * (db // g2))
 
     __sub__, __rsub__ = _operator_fallbacks(_sub, operator.sub)
 
     def _mul(a, b):
         """a * b"""
-        na, da = a.numerator, a.denominator
-        nb, db = b.numerator, b.denominator
+        na, da = a._numerator, a._denominator
+        nb, db = b._numerator, b._denominator
         g1 = math.gcd(na, db)
         if g1 > 1:
             na //= g1
@@ -493,15 +751,17 @@ class Fraction(numbers.Rational):
         if g2 > 1:
             nb //= g2
             da //= g2
-        return Fraction(na * nb, db * da, _normalize=False)
+        return Fraction._from_coprime_ints(na * nb, db * da)
 
     __mul__, __rmul__ = _operator_fallbacks(_mul, operator.mul)
 
     def _div(a, b):
         """a / b"""
         # Same as _mul(), with inversed b.
-        na, da = a.numerator, a.denominator
-        nb, db = b.numerator, b.denominator
+        nb, db = b._numerator, b._denominator
+        if nb == 0:
+            raise ZeroDivisionError('Fraction(%s, 0)' % db)
+        na, da = a._numerator, a._denominator
         g1 = math.gcd(na, nb)
         if g1 > 1:
             na //= g1
@@ -513,7 +773,7 @@ class Fraction(numbers.Rational):
         n, d = na * db, nb * da
         if d < 0:
             n, d = -n, -d
-        return Fraction(n, d, _normalize=False)
+        return Fraction._from_coprime_ints(n, d)
 
     __truediv__, __rtruediv__ = _operator_fallbacks(_div, operator.truediv)
 
@@ -550,17 +810,17 @@ class Fraction(numbers.Rational):
             if b.denominator == 1:
                 power = b.numerator
                 if power >= 0:
-                    return Fraction(a._numerator ** power,
-                                    a._denominator ** power,
-                                    _normalize=False)
-                elif a._numerator >= 0:
-                    return Fraction(a._denominator ** -power,
-                                    a._numerator ** -power,
-                                    _normalize=False)
+                    return Fraction._from_coprime_ints(a._numerator ** power,
+                                                       a._denominator ** power)
+                elif a._numerator > 0:
+                    return Fraction._from_coprime_ints(a._denominator ** -power,
+                                                       a._numerator ** -power)
+                elif a._numerator == 0:
+                    raise ZeroDivisionError('Fraction(%s, 0)' %
+                                            a._denominator ** -power)
                 else:
-                    return Fraction((-a._denominator) ** -power,
-                                    (-a._numerator) ** -power,
-                                    _normalize=False)
+                    return Fraction._from_coprime_ints((-a._denominator) ** -power,
+                                                       (-a._numerator) ** -power)
             else:
                 # A fractional power will generally produce an
                 # irrational number.
@@ -584,15 +844,15 @@ class Fraction(numbers.Rational):
 
     def __pos__(a):
         """+a: Coerces a subclass instance to Fraction"""
-        return Fraction(a._numerator, a._denominator, _normalize=False)
+        return Fraction._from_coprime_ints(a._numerator, a._denominator)
 
     def __neg__(a):
         """-a"""
-        return Fraction(-a._numerator, a._denominator, _normalize=False)
+        return Fraction._from_coprime_ints(-a._numerator, a._denominator)
 
     def __abs__(a):
         """abs(a)"""
-        return Fraction(abs(a._numerator), a._denominator, _normalize=False)
+        return Fraction._from_coprime_ints(abs(a._numerator), a._denominator)
 
     def __int__(a, _index=operator.index):
         """int(a)"""
@@ -610,12 +870,12 @@ class Fraction(numbers.Rational):
 
     def __floor__(a):
         """math.floor(a)"""
-        return a.numerator // a.denominator
+        return a._numerator // a._denominator
 
     def __ceil__(a):
         """math.ceil(a)"""
         # The negations cleverly convince floordiv to return the ceiling.
-        return -(-a.numerator // a.denominator)
+        return -(-a._numerator // a._denominator)
 
     def __round__(self, ndigits=None):
         """round(self, ndigits)
@@ -623,10 +883,11 @@ class Fraction(numbers.Rational):
         Rounds half toward even.
         """
         if ndigits is None:
-            floor, remainder = divmod(self.numerator, self.denominator)
-            if remainder * 2 < self.denominator:
+            d = self._denominator
+            floor, remainder = divmod(self._numerator, d)
+            if remainder * 2 < d:
                 return floor
-            elif remainder * 2 > self.denominator:
+            elif remainder * 2 > d:
                 return floor + 1
             # Deal with the half case:
             elif floor % 2 == 0:
@@ -644,36 +905,7 @@ class Fraction(numbers.Rational):
 
     def __hash__(self):
         """hash(self)"""
-
-        # To make sure that the hash of a Fraction agrees with the hash
-        # of a numerically equal integer, float or Decimal instance, we
-        # follow the rules for numeric hashes outlined in the
-        # documentation.  (See library docs, 'Built-in Types').
-
-        try:
-            dinv = pow(self._denominator, -1, _PyHASH_MODULUS)
-        except ValueError:
-            # ValueError means there is no modular inverse.
-            hash_ = _PyHASH_INF
-        else:
-            # The general algorithm now specifies that the absolute value of
-            # the hash is
-            #    (|N| * dinv) % P
-            # where N is self._numerator and P is _PyHASH_MODULUS.  That's
-            # optimized here in two ways:  first, for a non-negative int i,
-            # hash(i) == i % P, but the int hash implementation doesn't need
-            # to divide, and is faster than doing % P explicitly.  So we do
-            #    hash(|N| * dinv)
-            # instead.  Second, N is unbounded, so its product with dinv may
-            # be arbitrarily expensive to compute.  The final answer is the
-            # same if we use the bounded |N| % P instead, which can again
-            # be done with an int hash() call.  If 0 <= i < P, hash(i) == i,
-            # so this nested hash() call wastes a bit of time making a
-            # redundant copy when |N| < P, but can save an arbitrarily large
-            # amount of computation for large |N|.
-            hash_ = hash(hash(abs(self._numerator)) * dinv)
-        result = hash_ if self._numerator >= 0 else -hash_
-        return -2 if result == -1 else result
+        return _hash_algorithm(self._numerator, self._denominator)
 
     def __eq__(a, b):
         """a == b"""
diff --git a/contrib/tools/python3/src/Lib/ftplib.py b/contrib/tools/python3/src/Lib/ftplib.py
index 40a76c9ca4..10c5d1ea08 100644
--- a/contrib/tools/python3/src/Lib/ftplib.py
+++ b/contrib/tools/python3/src/Lib/ftplib.py
@@ -434,10 +434,7 @@ class FTP:
         """
         self.voidcmd('TYPE I')
         with self.transfercmd(cmd, rest) as conn:
-            while 1:
-                data = conn.recv(blocksize)
-                if not data:
-                    break
+            while data := conn.recv(blocksize):
                 callback(data)
             # shutdown ssl layer
             if _SSLSocket is not None and isinstance(conn, _SSLSocket):
@@ -496,10 +493,7 @@ class FTP:
         """
         self.voidcmd('TYPE I')
         with self.transfercmd(cmd, rest) as conn:
-            while 1:
-                buf = fp.read(blocksize)
-                if not buf:
-                    break
+            while buf := fp.read(blocksize):
                 conn.sendall(buf)
                 if callback:
                     callback(buf)
@@ -561,7 +555,7 @@ class FTP:
         LIST command.  (This *should* only be used for a pathname.)'''
         cmd = 'LIST'
         func = None
-        if args[-1:] and type(args[-1]) != type(''):
+        if args[-1:] and not isinstance(args[-1], str):
             args, func = args[:-1], args[-1]
         for arg in args:
             if arg:
@@ -713,28 +707,12 @@ else:
         '221 Goodbye.'
         >>>
         '''
-        ssl_version = ssl.PROTOCOL_TLS_CLIENT
 
         def __init__(self, host='', user='', passwd='', acct='',
-                     keyfile=None, certfile=None, context=None,
-                     timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None, *,
-                     encoding='utf-8'):
-            if context is not None and keyfile is not None:
-                raise ValueError("context and keyfile arguments are mutually "
-                                 "exclusive")
-            if context is not None and certfile is not None:
-                raise ValueError("context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom context instead", DeprecationWarning, 2)
-            self.keyfile = keyfile
-            self.certfile = certfile
+                     *, context=None, timeout=_GLOBAL_DEFAULT_TIMEOUT,
+                     source_address=None, encoding='utf-8'):
             if context is None:
-                context = ssl._create_stdlib_context(self.ssl_version,
-                                                     certfile=certfile,
-                                                     keyfile=keyfile)
+                context = ssl._create_stdlib_context()
             self.context = context
             self._prot_p = False
             super().__init__(host, user, passwd, acct,
@@ -749,7 +727,7 @@ else:
             '''Set up secure control connection by using TLS/SSL.'''
             if isinstance(self.sock, ssl.SSLSocket):
                 raise ValueError("Already using TLS")
-            if self.ssl_version >= ssl.PROTOCOL_TLS:
+            if self.context.protocol >= ssl.PROTOCOL_TLS:
                 resp = self.voidcmd('AUTH TLS')
             else:
                 resp = self.voidcmd('AUTH SSL')
diff --git a/contrib/tools/python3/src/Lib/functools.py b/contrib/tools/python3/src/Lib/functools.py
index 43ead512e1..2ae4290f98 100644
--- a/contrib/tools/python3/src/Lib/functools.py
+++ b/contrib/tools/python3/src/Lib/functools.py
@@ -30,7 +30,7 @@ from types import GenericAlias
 # wrapper functions that can handle naive introspection
 
 WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__qualname__', '__doc__',
-                       '__annotations__')
+                       '__annotations__', '__type_params__')
 WRAPPER_UPDATES = ('__dict__',)
 def update_wrapper(wrapper,
                    wrapped,
@@ -956,18 +956,16 @@ class singledispatchmethod:
 
 
 ################################################################################
-### cached_property() - computed once per instance, cached as attribute
+### cached_property() - property result cached as instance attribute
 ################################################################################
 
 _NOT_FOUND = object()
 
-
 class cached_property:
     def __init__(self, func):
         self.func = func
         self.attrname = None
         self.__doc__ = func.__doc__
-        self.lock = RLock()
 
     def __set_name__(self, owner, name):
         if self.attrname is None:
@@ -994,19 +992,15 @@ class cached_property:
             raise TypeError(msg) from None
         val = cache.get(self.attrname, _NOT_FOUND)
         if val is _NOT_FOUND:
-            with self.lock:
-                # check if another thread filled cache while we awaited lock
-                val = cache.get(self.attrname, _NOT_FOUND)
-                if val is _NOT_FOUND:
-                    val = self.func(instance)
-                    try:
-                        cache[self.attrname] = val
-                    except TypeError:
-                        msg = (
-                            f"The '__dict__' attribute on {type(instance).__name__!r} instance "
-                            f"does not support item assignment for caching {self.attrname!r} property."
-                        )
-                        raise TypeError(msg) from None
+            val = self.func(instance)
+            try:
+                cache[self.attrname] = val
+            except TypeError:
+                msg = (
+                    f"The '__dict__' attribute on {type(instance).__name__!r} instance "
+                    f"does not support item assignment for caching {self.attrname!r} property."
+                )
+                raise TypeError(msg) from None
         return val
 
     __class_getitem__ = classmethod(GenericAlias)
diff --git a/contrib/tools/python3/src/Lib/genericpath.py b/contrib/tools/python3/src/Lib/genericpath.py
index ce36451a3a..1bd5b3897c 100644
--- a/contrib/tools/python3/src/Lib/genericpath.py
+++ b/contrib/tools/python3/src/Lib/genericpath.py
@@ -7,7 +7,7 @@ import os
 import stat
 
 __all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime',
-           'getsize', 'isdir', 'isfile', 'samefile', 'sameopenfile',
+           'getsize', 'isdir', 'isfile', 'islink', 'samefile', 'sameopenfile',
            'samestat']
 
 
@@ -45,6 +45,18 @@ def isdir(s):
     return stat.S_ISDIR(st.st_mode)
 
 
+# Is a path a symbolic link?
+# This will always return false on systems where os.lstat doesn't exist.
+
+def islink(path):
+    """Test whether a path is a symbolic link"""
+    try:
+        st = os.lstat(path)
+    except (OSError, ValueError, AttributeError):
+        return False
+    return stat.S_ISLNK(st.st_mode)
+
+
 def getsize(filename):
     """Return the size of a file, reported by os.stat()."""
     return os.stat(filename).st_size
diff --git a/contrib/tools/python3/src/Lib/getopt.py b/contrib/tools/python3/src/Lib/getopt.py
index 9d4cab1bac..5419d77f5d 100644
--- a/contrib/tools/python3/src/Lib/getopt.py
+++ b/contrib/tools/python3/src/Lib/getopt.py
@@ -81,7 +81,7 @@ def getopt(args, shortopts, longopts = []):
     """
 
     opts = []
-    if type(longopts) == type(""):
+    if isinstance(longopts, str):
         longopts = [longopts]
     else:
         longopts = list(longopts)
diff --git a/contrib/tools/python3/src/Lib/gzip.py b/contrib/tools/python3/src/Lib/gzip.py
index 5b20e5ba69..177f9080dc 100644
--- a/contrib/tools/python3/src/Lib/gzip.py
+++ b/contrib/tools/python3/src/Lib/gzip.py
@@ -21,6 +21,9 @@ _COMPRESS_LEVEL_FAST = 1
 _COMPRESS_LEVEL_TRADEOFF = 6
 _COMPRESS_LEVEL_BEST = 9
 
+READ_BUFFER_SIZE = 128 * 1024
+_WRITE_BUFFER_SIZE = 4 * io.DEFAULT_BUFFER_SIZE
+
 
 def open(filename, mode="rb", compresslevel=_COMPRESS_LEVEL_BEST,
          encoding=None, errors=None, newline=None):
@@ -118,6 +121,21 @@ class BadGzipFile(OSError):
     """Exception raised in some cases for invalid gzip files."""
 
 
+class _WriteBufferStream(io.RawIOBase):
+    """Minimal object to pass WriteBuffer flushes into GzipFile"""
+    def __init__(self, gzip_file):
+        self.gzip_file = gzip_file
+
+    def write(self, data):
+        return self.gzip_file._write_raw(data)
+
+    def seekable(self):
+        return False
+
+    def writable(self):
+        return True
+
+
 class GzipFile(_compression.BaseStream):
     """The GzipFile class simulates most of the methods of a file object with
     the exception of the truncate() method.
@@ -182,6 +200,7 @@ class GzipFile(_compression.BaseStream):
         if mode is None:
             mode = getattr(fileobj, 'mode', 'rb')
 
+
         if mode.startswith('r'):
             self.mode = READ
             raw = _GzipReader(fileobj)
@@ -204,6 +223,9 @@ class GzipFile(_compression.BaseStream):
                                              zlib.DEF_MEM_LEVEL,
                                              0)
             self._write_mtime = mtime
+            self._buffer_size = _WRITE_BUFFER_SIZE
+            self._buffer = io.BufferedWriter(_WriteBufferStream(self),
+                                             buffer_size=self._buffer_size)
         else:
             raise ValueError("Invalid mode: {!r}".format(mode))
 
@@ -213,14 +235,6 @@ class GzipFile(_compression.BaseStream):
             self._write_gzip_header(compresslevel)
 
     @property
-    def filename(self):
-        import warnings
-        warnings.warn("use the name attribute", DeprecationWarning, 2)
-        if self.mode == WRITE and self.name[-3:] != ".gz":
-            return self.name + ".gz"
-        return self.name
-
-    @property
     def mtime(self):
         """Last modification time read from stream, or None"""
         return self._buffer.raw._last_mtime
@@ -237,6 +251,11 @@ class GzipFile(_compression.BaseStream):
         self.bufsize = 0
         self.offset = 0  # Current file offset for seek(), tell(), etc
 
+    def tell(self):
+        self._check_not_closed()
+        self._buffer.flush()
+        return super().tell()
+
     def _write_gzip_header(self, compresslevel):
         self.fileobj.write(b'\037\213')             # magic header
         self.fileobj.write(b'\010')                 # compression method
@@ -278,6 +297,10 @@ class GzipFile(_compression.BaseStream):
         if self.fileobj is None:
             raise ValueError("write() on closed GzipFile object")
 
+        return self._buffer.write(data)
+
+    def _write_raw(self, data):
+        # Called by our self._buffer underlying WriteBufferStream.
         if isinstance(data, (bytes, bytearray)):
             length = len(data)
         else:
@@ -328,9 +351,9 @@ class GzipFile(_compression.BaseStream):
         fileobj = self.fileobj
         if fileobj is None:
             return
-        self.fileobj = None
         try:
             if self.mode == WRITE:
+                self._buffer.flush()
                 fileobj.write(self.compress.flush())
                 write32u(fileobj, self.crc)
                 # self.size may exceed 2 GiB, or even 4 GiB
@@ -338,6 +361,7 @@ class GzipFile(_compression.BaseStream):
             elif self.mode == READ:
                 self._buffer.close()
         finally:
+            self.fileobj = None
             myfileobj = self.myfileobj
             if myfileobj:
                 self.myfileobj = None
@@ -346,6 +370,7 @@ class GzipFile(_compression.BaseStream):
     def flush(self,zlib_mode=zlib.Z_SYNC_FLUSH):
         self._check_not_closed()
         if self.mode == WRITE:
+            self._buffer.flush()
             # Ensure the compressor's buffer is flushed
             self.fileobj.write(self.compress.flush(zlib_mode))
             self.fileobj.flush()
@@ -376,6 +401,9 @@ class GzipFile(_compression.BaseStream):
 
     def seek(self, offset, whence=io.SEEK_SET):
         if self.mode == WRITE:
+            self._check_not_closed()
+            # Flush buffer to ensure validity of self.offset
+            self._buffer.flush()
             if whence != io.SEEK_SET:
                 if whence == io.SEEK_CUR:
                     offset = self.offset + offset
@@ -384,10 +412,10 @@ class GzipFile(_compression.BaseStream):
             if offset < self.offset:
                 raise OSError('Negative seek in write mode')
             count = offset - self.offset
-            chunk = b'\0' * 1024
-            for i in range(count // 1024):
+            chunk = b'\0' * self._buffer_size
+            for i in range(count // self._buffer_size):
                 self.write(chunk)
-            self.write(b'\0' * (count % 1024))
+            self.write(b'\0' * (count % self._buffer_size))
         elif self.mode == READ:
             self._check_not_closed()
             return self._buffer.seek(offset, whence)
@@ -454,7 +482,7 @@ def _read_gzip_header(fp):
 
 class _GzipReader(_compression.DecompressReader):
     def __init__(self, fp):
-        super().__init__(_PaddedFile(fp), zlib.decompressobj,
+        super().__init__(_PaddedFile(fp), zlib._ZlibDecompressor,
                          wbits=-zlib.MAX_WBITS)
         # Set flag indicating start of a new member
         self._new_member = True
@@ -502,12 +530,13 @@ class _GzipReader(_compression.DecompressReader):
                 self._new_member = False
 
             # Read a chunk of data from the file
-            buf = self._fp.read(io.DEFAULT_BUFFER_SIZE)
+            if self._decompressor.needs_input:
+                buf = self._fp.read(READ_BUFFER_SIZE)
+                uncompress = self._decompressor.decompress(buf, size)
+            else:
+                uncompress = self._decompressor.decompress(b"", size)
 
-            uncompress = self._decompressor.decompress(buf, size)
-            if self._decompressor.unconsumed_tail != b"":
-                self._fp.prepend(self._decompressor.unconsumed_tail)
-            elif self._decompressor.unused_data != b"":
+            if self._decompressor.unused_data != b"":
                 # Prepend the already read bytes to the fileobj so they can
                 # be seen by _read_eof() and _read_gzip_header()
                 self._fp.prepend(self._decompressor.unused_data)
@@ -518,14 +547,11 @@ class _GzipReader(_compression.DecompressReader):
                 raise EOFError("Compressed file ended before the "
                                "end-of-stream marker was reached")
 
-        self._add_read_data( uncompress )
+        self._crc = zlib.crc32(uncompress, self._crc)
+        self._stream_size += len(uncompress)
         self._pos += len(uncompress)
         return uncompress
 
-    def _add_read_data(self, data):
-        self._crc = zlib.crc32(data, self._crc)
-        self._stream_size = self._stream_size + len(data)
-
     def _read_eof(self):
         # We've read to the end of the file
         # We check that the computed CRC and size of the
@@ -655,7 +681,7 @@ def main():
                 f = builtins.open(arg, "rb")
                 g = open(arg + ".gz", "wb")
         while True:
-            chunk = f.read(io.DEFAULT_BUFFER_SIZE)
+            chunk = f.read(READ_BUFFER_SIZE)
             if not chunk:
                 break
             g.write(chunk)
diff --git a/contrib/tools/python3/src/Lib/hashlib.py b/contrib/tools/python3/src/Lib/hashlib.py
index b546a3fd79..1b16441cb6 100644
--- a/contrib/tools/python3/src/Lib/hashlib.py
+++ b/contrib/tools/python3/src/Lib/hashlib.py
@@ -65,7 +65,7 @@ algorithms_guaranteed = set(__always_supported)
 algorithms_available = set(__always_supported)
 
 __all__ = __always_supported + ('new', 'algorithms_guaranteed',
-                                'algorithms_available', 'pbkdf2_hmac', 'file_digest')
+                                'algorithms_available', 'file_digest')
 
 
 __builtin_constructor_cache = {}
@@ -92,13 +92,13 @@ def __get_builtin_constructor(name):
             import _md5
             cache['MD5'] = cache['md5'] = _md5.md5
         elif name in {'SHA256', 'sha256', 'SHA224', 'sha224'}:
-            import _sha256
-            cache['SHA224'] = cache['sha224'] = _sha256.sha224
-            cache['SHA256'] = cache['sha256'] = _sha256.sha256
+            import _sha2
+            cache['SHA224'] = cache['sha224'] = _sha2.sha224
+            cache['SHA256'] = cache['sha256'] = _sha2.sha256
         elif name in {'SHA512', 'sha512', 'SHA384', 'sha384'}:
-            import _sha512
-            cache['SHA384'] = cache['sha384'] = _sha512.sha384
-            cache['SHA512'] = cache['sha512'] = _sha512.sha512
+            import _sha2
+            cache['SHA384'] = cache['sha384'] = _sha2.sha384
+            cache['SHA512'] = cache['sha512'] = _sha2.sha512
         elif name in {'blake2b', 'blake2s'}:
             import _blake2
             cache['blake2b'] = _blake2.blake2b
@@ -180,72 +180,10 @@ except ImportError:
 try:
     # OpenSSL's PKCS5_PBKDF2_HMAC requires OpenSSL 1.0+ with HMAC and SHA
     from _hashlib import pbkdf2_hmac
+    __all__ += ('pbkdf2_hmac',)
 except ImportError:
-    from warnings import warn as _warn
-    _trans_5C = bytes((x ^ 0x5C) for x in range(256))
-    _trans_36 = bytes((x ^ 0x36) for x in range(256))
-
-    def pbkdf2_hmac(hash_name, password, salt, iterations, dklen=None):
-        """Password based key derivation function 2 (PKCS #5 v2.0)
-
-        This Python implementations based on the hmac module about as fast
-        as OpenSSL's PKCS5_PBKDF2_HMAC for short passwords and much faster
-        for long passwords.
-        """
-        _warn(
-            "Python implementation of pbkdf2_hmac() is deprecated.",
-            category=DeprecationWarning,
-            stacklevel=2
-        )
-        if not isinstance(hash_name, str):
-            raise TypeError(hash_name)
-
-        if not isinstance(password, (bytes, bytearray)):
-            password = bytes(memoryview(password))
-        if not isinstance(salt, (bytes, bytearray)):
-            salt = bytes(memoryview(salt))
-
-        # Fast inline HMAC implementation
-        inner = new(hash_name)
-        outer = new(hash_name)
-        blocksize = getattr(inner, 'block_size', 64)
-        if len(password) > blocksize:
-            password = new(hash_name, password).digest()
-        password = password + b'\x00' * (blocksize - len(password))
-        inner.update(password.translate(_trans_36))
-        outer.update(password.translate(_trans_5C))
-
-        def prf(msg, inner=inner, outer=outer):
-            # PBKDF2_HMAC uses the password as key. We can re-use the same
-            # digest objects and just update copies to skip initialization.
-            icpy = inner.copy()
-            ocpy = outer.copy()
-            icpy.update(msg)
-            ocpy.update(icpy.digest())
-            return ocpy.digest()
-
-        if iterations < 1:
-            raise ValueError(iterations)
-        if dklen is None:
-            dklen = outer.digest_size
-        if dklen < 1:
-            raise ValueError(dklen)
-
-        dkey = b''
-        loop = 1
-        from_bytes = int.from_bytes
-        while len(dkey) < dklen:
-            prev = prf(salt + loop.to_bytes(4))
-            # endianness doesn't matter here as long to / from use the same
-            rkey = from_bytes(prev)
-            for i in range(iterations - 1):
-                prev = prf(prev)
-                # rkey = rkey ^ prev
-                rkey ^= from_bytes(prev)
-            loop += 1
-            dkey += rkey.to_bytes(inner.digest_size)
-
-        return dkey[:dklen]
+    pass
+
 
 try:
     # OpenSSL's scrypt requires OpenSSL 1.1+
diff --git a/contrib/tools/python3/src/Lib/html/entities.py b/contrib/tools/python3/src/Lib/html/entities.py
index dc508631ac..eb6dc12190 100644
--- a/contrib/tools/python3/src/Lib/html/entities.py
+++ b/contrib/tools/python3/src/Lib/html/entities.py
@@ -3,8 +3,7 @@
 __all__ = ['html5', 'name2codepoint', 'codepoint2name', 'entitydefs']
 
 
-# maps the HTML entity name to the Unicode code point
-# from https://html.spec.whatwg.org/multipage/named-characters.html
+# maps HTML4 entity name to the Unicode code point
 name2codepoint = {
     'AElig':    0x00c6, # latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1
     'Aacute':   0x00c1, # latin capital letter A with acute, U+00C1 ISOlat1
@@ -261,7 +260,11 @@ name2codepoint = {
 }
 
 
-# maps the HTML5 named character references to the equivalent Unicode character(s)
+# HTML5 named character references
+# Generated by Tools/build/parse_html5_entities.py
+# from https://html.spec.whatwg.org/entities.json and
+# https://html.spec.whatwg.org/multipage/named-characters.html.
+# Map HTML5 named character references to the equivalent Unicode character(s).
 html5 = {
     'Aacute': '\xc1',
     'aacute': '\xe1',
diff --git a/contrib/tools/python3/src/Lib/html/parser.py b/contrib/tools/python3/src/Lib/html/parser.py
index bef0f4fe4b..13c95c34e5 100644
--- a/contrib/tools/python3/src/Lib/html/parser.py
+++ b/contrib/tools/python3/src/Lib/html/parser.py
@@ -89,6 +89,7 @@ class HTMLParser(_markupbase.ParserBase):
         If convert_charrefs is True (the default), all character references
         are automatically converted to the corresponding Unicode characters.
         """
+        super().__init__()
         self.convert_charrefs = convert_charrefs
         self.reset()
 
@@ -98,7 +99,7 @@ class HTMLParser(_markupbase.ParserBase):
         self.lasttag = '???'
         self.interesting = interesting_normal
         self.cdata_elem = None
-        _markupbase.ParserBase.reset(self)
+        super().reset()
 
     def feed(self, data):
         r"""Feed data to the parser.
diff --git a/contrib/tools/python3/src/Lib/http/__init__.py b/contrib/tools/python3/src/Lib/http/__init__.py
index cd2885dc77..e093a1fec4 100644
--- a/contrib/tools/python3/src/Lib/http/__init__.py
+++ b/contrib/tools/python3/src/Lib/http/__init__.py
@@ -31,6 +31,26 @@ class HTTPStatus:
         obj.description = description
         return obj
 
+    @property
+    def is_informational(self):
+        return 100 <= self <= 199
+
+    @property
+    def is_success(self):
+        return 200 <= self <= 299
+
+    @property
+    def is_redirection(self):
+        return 300 <= self <= 399
+
+    @property
+    def is_client_error(self):
+        return 400 <= self <= 499
+
+    @property
+    def is_server_error(self):
+        return 500 <= self <= 599
+
     # informational
     CONTINUE = 100, 'Continue', 'Request received, please continue'
     SWITCHING_PROTOCOLS = (101, 'Switching Protocols',
diff --git a/contrib/tools/python3/src/Lib/http/client.py b/contrib/tools/python3/src/Lib/http/client.py
index 1ee22989ae..5eebfccafb 100644
--- a/contrib/tools/python3/src/Lib/http/client.py
+++ b/contrib/tools/python3/src/Lib/http/client.py
@@ -228,8 +228,9 @@ def _read_headers(fp):
             break
     return headers
 
-def parse_headers(fp, _class=HTTPMessage):
-    """Parses only RFC2822 headers from a file pointer.
+def _parse_header_lines(header_lines, _class=HTTPMessage):
+    """
+    Parses only RFC2822 headers from header lines.
 
     email Parser wants to see strings rather than bytes.
     But a TextIOWrapper around self.rfile would buffer too many bytes
@@ -238,10 +239,15 @@ def parse_headers(fp, _class=HTTPMessage):
     to parse.
 
     """
-    headers = _read_headers(fp)
-    hstring = b''.join(headers).decode('iso-8859-1')
+    hstring = b''.join(header_lines).decode('iso-8859-1')
     return email.parser.Parser(_class=_class).parsestr(hstring)
 
+def parse_headers(fp, _class=HTTPMessage):
+    """Parses only RFC2822 headers from a file pointer."""
+
+    headers = _read_headers(fp)
+    return _parse_header_lines(headers, _class)
+
 
 class HTTPResponse(io.BufferedIOBase):
 
@@ -586,11 +592,7 @@ class HTTPResponse(io.BufferedIOBase):
         assert self.chunked != _UNKNOWN
         value = []
         try:
-            while True:
-                chunk_left = self._get_chunk_left()
-                if chunk_left is None:
-                    break
-
+            while (chunk_left := self._get_chunk_left()) is not None:
                 if amt is not None and amt <= chunk_left:
                     value.append(self._safe_read(amt))
                     self.chunk_left = chunk_left - amt
@@ -798,6 +800,20 @@ class HTTPResponse(io.BufferedIOBase):
         '''
         return self.status
 
+
+def _create_https_context(http_version):
+    # Function also used by urllib.request to be able to set the check_hostname
+    # attribute on a context object.
+    context = ssl._create_default_https_context()
+    # send ALPN extension to indicate HTTP/1.1 protocol
+    if http_version == 11:
+        context.set_alpn_protocols(['http/1.1'])
+    # enable PHA for TLS 1.3 connections if available
+    if context.post_handshake_auth is not None:
+        context.post_handshake_auth = True
+    return context
+
+
 class HTTPConnection:
 
     _http_vsn = 11
@@ -859,6 +875,7 @@ class HTTPConnection:
         self._tunnel_host = None
         self._tunnel_port = None
         self._tunnel_headers = {}
+        self._raw_proxy_headers = None
 
         (self.host, self.port) = self._get_hostport(host, port)
 
@@ -871,9 +888,9 @@ class HTTPConnection:
     def set_tunnel(self, host, port=None, headers=None):
         """Set up host and port for HTTP CONNECT tunnelling.
 
-        In a connection that uses HTTP CONNECT tunneling, the host passed to the
-        constructor is used as a proxy server that relays all communication to
-        the endpoint passed to `set_tunnel`. This done by sending an HTTP
+        In a connection that uses HTTP CONNECT tunnelling, the host passed to
+        the constructor is used as a proxy server that relays all communication
+        to the endpoint passed to `set_tunnel`. This done by sending an HTTP
         CONNECT request to the proxy server when the connection is established.
 
         This method must be called before the HTTP connection has been
@@ -881,6 +898,13 @@ class HTTPConnection:
 
         The headers argument should be a mapping of extra HTTP headers to send
         with the CONNECT request.
+
+        As HTTP/1.1 is used for HTTP CONNECT tunnelling request, as per the RFC
+        (https://tools.ietf.org/html/rfc7231#section-4.3.6), a HTTP Host:
+        header must be provided, matching the authority-form of the request
+        target provided as the destination for the CONNECT request. If a
+        HTTP Host: header is not provided via the headers argument, one
+        is generated and transmitted automatically.
         """
 
         if self.sock:
@@ -888,10 +912,15 @@ class HTTPConnection:
 
         self._tunnel_host, self._tunnel_port = self._get_hostport(host, port)
         if headers:
-            self._tunnel_headers = headers
+            self._tunnel_headers = headers.copy()
         else:
             self._tunnel_headers.clear()
 
+        if not any(header.lower() == "host" for header in self._tunnel_headers):
+            encoded_host = self._tunnel_host.encode("idna").decode("ascii")
+            self._tunnel_headers["Host"] = "%s:%d" % (
+                encoded_host, self._tunnel_port)
+
     def _get_hostport(self, host, port):
         if port is None:
             i = host.rfind(':')
@@ -916,8 +945,9 @@ class HTTPConnection:
         self.debuglevel = level
 
     def _tunnel(self):
-        connect = b"CONNECT %s:%d HTTP/1.0\r\n" % (
-            self._tunnel_host.encode("ascii"), self._tunnel_port)
+        connect = b"CONNECT %s:%d %s\r\n" % (
+            self._tunnel_host.encode("idna"), self._tunnel_port,
+            self._http_vsn_str.encode("ascii"))
         headers = [connect]
         for header, value in self._tunnel_headers.items():
             headers.append(f"{header}: {value}\r\n".encode("latin-1"))
@@ -932,24 +962,33 @@ class HTTPConnection:
         try:
             (version, code, message) = response._read_status()
 
+            self._raw_proxy_headers = _read_headers(response.fp)
+
+            if self.debuglevel > 0:
+                for header in self._raw_proxy_headers:
+                    print('header:', header.decode())
+
             if code != http.HTTPStatus.OK:
                 self.close()
                 raise OSError(f"Tunnel connection failed: {code} {message.strip()}")
-            while True:
-                line = response.fp.readline(_MAXLINE + 1)
-                if len(line) > _MAXLINE:
-                    raise LineTooLong("header line")
-                if not line:
-                    # for sites which EOF without sending a trailer
-                    break
-                if line in (b'\r\n', b'\n', b''):
-                    break
 
-                if self.debuglevel > 0:
-                    print('header:', line.decode())
         finally:
             response.close()
 
+    def get_proxy_response_headers(self):
+        """
+        Returns a dictionary with the headers of the response
+        received from the proxy server to the CONNECT request
+        sent to set the tunnel.
+
+        If the CONNECT request was not sent, the method returns None.
+        """
+        return (
+            _parse_header_lines(self._raw_proxy_headers)
+            if self._raw_proxy_headers is not None
+            else None
+        )
+
     def connect(self):
         """Connect to the host and port specified in __init__."""
         sys.audit("http.client.connect", self, self.host, self.port)
@@ -999,10 +1038,7 @@ class HTTPConnection:
             encode = self._is_textIO(data)
             if encode and self.debuglevel > 0:
                 print("encoding file using iso-8859-1")
-            while 1:
-                datablock = data.read(self.blocksize)
-                if not datablock:
-                    break
+            while datablock := data.read(self.blocksize):
                 if encode:
                     datablock = datablock.encode("iso-8859-1")
                 sys.audit("http.client.send", self, datablock)
@@ -1032,10 +1068,7 @@ class HTTPConnection:
         encode = self._is_textIO(readable)
         if encode and self.debuglevel > 0:
             print("encoding file using iso-8859-1")
-        while True:
-            datablock = readable.read(self.blocksize)
-            if not datablock:
-                break
+        while datablock := readable.read(self.blocksize):
             if encode:
                 datablock = datablock.encode("iso-8859-1")
             yield datablock
@@ -1416,46 +1449,15 @@ else:
 
         default_port = HTTPS_PORT
 
-        # XXX Should key_file and cert_file be deprecated in favour of context?
-
-        def __init__(self, host, port=None, key_file=None, cert_file=None,
-                     timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
-                     source_address=None, *, context=None,
-                     check_hostname=None, blocksize=8192):
+        def __init__(self, host, port=None,
+                     *, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+                     source_address=None, context=None, blocksize=8192):
             super(HTTPSConnection, self).__init__(host, port, timeout,
                                                   source_address,
                                                   blocksize=blocksize)
-            if (key_file is not None or cert_file is not None or
-                        check_hostname is not None):
-                import warnings
-                warnings.warn("key_file, cert_file and check_hostname are "
-                              "deprecated, use a custom context instead.",
-                              DeprecationWarning, 2)
-            self.key_file = key_file
-            self.cert_file = cert_file
             if context is None:
-                context = ssl._create_default_https_context()
-                # send ALPN extension to indicate HTTP/1.1 protocol
-                if self._http_vsn == 11:
-                    context.set_alpn_protocols(['http/1.1'])
-                # enable PHA for TLS 1.3 connections if available
-                if context.post_handshake_auth is not None:
-                    context.post_handshake_auth = True
-            will_verify = context.verify_mode != ssl.CERT_NONE
-            if check_hostname is None:
-                check_hostname = context.check_hostname
-            if check_hostname and not will_verify:
-                raise ValueError("check_hostname needs a SSL context with "
-                                 "either CERT_OPTIONAL or CERT_REQUIRED")
-            if key_file or cert_file:
-                context.load_cert_chain(cert_file, key_file)
-                # cert and key file means the user wants to authenticate.
-                # enable TLS 1.3 PHA implicitly even for custom contexts.
-                if context.post_handshake_auth is not None:
-                    context.post_handshake_auth = True
+                context = _create_https_context(self._http_vsn)
             self._context = context
-            if check_hostname is not None:
-                self._context.check_hostname = check_hostname
 
         def connect(self):
             "Connect to a host on a given (SSL) port."
diff --git a/contrib/tools/python3/src/Lib/http/cookiejar.py b/contrib/tools/python3/src/Lib/http/cookiejar.py
index e622fc36cb..bd89370e16 100644
--- a/contrib/tools/python3/src/Lib/http/cookiejar.py
+++ b/contrib/tools/python3/src/Lib/http/cookiejar.py
@@ -104,9 +104,9 @@ def time2isoz(t=None):
 
     """
     if t is None:
-        dt = datetime.datetime.utcnow()
+        dt = datetime.datetime.now(tz=datetime.UTC)
     else:
-        dt = datetime.datetime.utcfromtimestamp(t)
+        dt = datetime.datetime.fromtimestamp(t, tz=datetime.UTC)
     return "%04d-%02d-%02d %02d:%02d:%02dZ" % (
         dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second)
 
@@ -122,9 +122,9 @@ def time2netscape(t=None):
 
     """
     if t is None:
-        dt = datetime.datetime.utcnow()
+        dt = datetime.datetime.now(tz=datetime.UTC)
     else:
-        dt = datetime.datetime.utcfromtimestamp(t)
+        dt = datetime.datetime.fromtimestamp(t, tz=datetime.UTC)
     return "%s, %02d-%s-%04d %02d:%02d:%02d GMT" % (
         DAYS[dt.weekday()], dt.day, MONTHS[dt.month-1],
         dt.year, dt.hour, dt.minute, dt.second)
@@ -640,7 +640,7 @@ def eff_request_host(request):
 
     """
     erhn = req_host = request_host(request)
-    if req_host.find(".") == -1 and not IPV4_RE.search(req_host):
+    if "." not in req_host:
         erhn = req_host + ".local"
     return req_host, erhn
 
@@ -1918,9 +1918,7 @@ class LWPCookieJar(FileCookieJar):
                        "comment", "commenturl")
 
         try:
-            while 1:
-                line = f.readline()
-                if line == "": break
+            while (line := f.readline()) != "":
                 if not line.startswith(header):
                     continue
                 line = line[len(header):].strip()
@@ -2020,12 +2018,9 @@ class MozillaCookieJar(FileCookieJar):
                 filename)
 
         try:
-            while 1:
-                line = f.readline()
+            while (line := f.readline()) != "":
                 rest = {}
 
-                if line == "": break
-
                 # httponly is a cookie flag as defined in rfc6265
                 # when encoded in a netscape cookie file,
                 # the line is prepended with "#HttpOnly_"
diff --git a/contrib/tools/python3/src/Lib/http/server.py b/contrib/tools/python3/src/Lib/http/server.py
index da07f110f1..ca6240d9a9 100644
--- a/contrib/tools/python3/src/Lib/http/server.py
+++ b/contrib/tools/python3/src/Lib/http/server.py
@@ -657,6 +657,7 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
     """
 
     server_version = "SimpleHTTP/" + __version__
+    index_pages = ("index.html", "index.htm")
     extensions_map = _encodings_map_default = {
         '.gz': 'application/gzip',
         '.Z': 'application/octet-stream',
@@ -710,7 +711,7 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
                 self.send_header("Content-Length", "0")
                 self.end_headers()
                 return None
-            for index in "index.html", "index.htm":
+            for index in self.index_pages:
                 index = os.path.join(path, index)
                 if os.path.isfile(index):
                     path = index
diff --git a/contrib/tools/python3/src/Lib/imaplib.py b/contrib/tools/python3/src/Lib/imaplib.py
index fa4c0f8f62..577b4b9b03 100644
--- a/contrib/tools/python3/src/Lib/imaplib.py
+++ b/contrib/tools/python3/src/Lib/imaplib.py
@@ -1285,16 +1285,12 @@ if HAVE_SSL:
 
         """IMAP4 client class over SSL connection
 
-        Instantiate with: IMAP4_SSL([host[, port[, keyfile[, certfile[, ssl_context[, timeout=None]]]]]])
+        Instantiate with: IMAP4_SSL([host[, port[, ssl_context[, timeout=None]]]])
 
                 host - host's name (default: localhost);
                 port - port number (default: standard IMAP4 SSL port);
-                keyfile - PEM formatted file that contains your private key (default: None);
-                certfile - PEM formatted certificate chain file (default: None);
                 ssl_context - a SSLContext object that contains your certificate chain
                               and private key (default: None)
-                Note: if ssl_context is provided, then parameters keyfile or
-                certfile should not be set otherwise ValueError is raised.
                 timeout - socket timeout (default: None) If timeout is not given or is None,
                           the global default socket timeout is used
 
@@ -1302,23 +1298,10 @@ if HAVE_SSL:
         """
 
 
-        def __init__(self, host='', port=IMAP4_SSL_PORT, keyfile=None,
-                     certfile=None, ssl_context=None, timeout=None):
-            if ssl_context is not None and keyfile is not None:
-                raise ValueError("ssl_context and keyfile arguments are mutually "
-                                 "exclusive")
-            if ssl_context is not None and certfile is not None:
-                raise ValueError("ssl_context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom ssl_context instead", DeprecationWarning, 2)
-            self.keyfile = keyfile
-            self.certfile = certfile
+        def __init__(self, host='', port=IMAP4_SSL_PORT,
+                     *, ssl_context=None, timeout=None):
             if ssl_context is None:
-                ssl_context = ssl._create_stdlib_context(certfile=certfile,
-                                                         keyfile=keyfile)
+                ssl_context = ssl._create_stdlib_context()
             self.ssl_context = ssl_context
             IMAP4.__init__(self, host, port, timeout)
 
diff --git a/contrib/tools/python3/src/Lib/imghdr.py b/contrib/tools/python3/src/Lib/imghdr.py
index 6a372e66c7..3386888347 100644
--- a/contrib/tools/python3/src/Lib/imghdr.py
+++ b/contrib/tools/python3/src/Lib/imghdr.py
@@ -14,6 +14,7 @@ warnings._deprecated(__name__, remove=(3, 13))
 #-------------------------#
 
 def what(file, h=None):
+    """Return the type of image contained in a file or byte stream."""
     f = None
     try:
         if h is None:
@@ -40,7 +41,7 @@ def what(file, h=None):
 tests = []
 
 def test_jpeg(h, f):
-    """JPEG data with JFIF or Exif markers; and raw JPEG"""
+    """Test for JPEG data with JFIF or Exif markers; and raw JPEG."""
     if h[6:10] in (b'JFIF', b'Exif'):
         return 'jpeg'
     elif h[:4] == b'\xff\xd8\xff\xdb':
@@ -49,34 +50,35 @@ def test_jpeg(h, f):
 tests.append(test_jpeg)
 
 def test_png(h, f):
+    """Verify if the image is a PNG."""
     if h.startswith(b'\211PNG\r\n\032\n'):
         return 'png'
 
 tests.append(test_png)
 
 def test_gif(h, f):
-    """GIF ('87 and '89 variants)"""
+    """Verify if the image is a GIF ('87 or '89 variants)."""
     if h[:6] in (b'GIF87a', b'GIF89a'):
         return 'gif'
 
 tests.append(test_gif)
 
 def test_tiff(h, f):
-    """TIFF (can be in Motorola or Intel byte order)"""
+    """Verify if the image is a TIFF (can be in Motorola or Intel byte order)."""
     if h[:2] in (b'MM', b'II'):
         return 'tiff'
 
 tests.append(test_tiff)
 
 def test_rgb(h, f):
-    """SGI image library"""
+    """test for the SGI image library."""
     if h.startswith(b'\001\332'):
         return 'rgb'
 
 tests.append(test_rgb)
 
 def test_pbm(h, f):
-    """PBM (portable bitmap)"""
+    """Verify if the image is a PBM (portable bitmap)."""
     if len(h) >= 3 and \
         h[0] == ord(b'P') and h[1] in b'14' and h[2] in b' \t\n\r':
         return 'pbm'
@@ -84,7 +86,7 @@ def test_pbm(h, f):
 tests.append(test_pbm)
 
 def test_pgm(h, f):
-    """PGM (portable graymap)"""
+    """Verify if the image is a PGM (portable graymap)."""
     if len(h) >= 3 and \
         h[0] == ord(b'P') and h[1] in b'25' and h[2] in b' \t\n\r':
         return 'pgm'
@@ -92,7 +94,7 @@ def test_pgm(h, f):
 tests.append(test_pgm)
 
 def test_ppm(h, f):
-    """PPM (portable pixmap)"""
+    """Verify if the image is a PPM (portable pixmap)."""
     if len(h) >= 3 and \
         h[0] == ord(b'P') and h[1] in b'36' and h[2] in b' \t\n\r':
         return 'ppm'
@@ -100,32 +102,35 @@ def test_ppm(h, f):
 tests.append(test_ppm)
 
 def test_rast(h, f):
-    """Sun raster file"""
+    """test for the Sun raster file."""
     if h.startswith(b'\x59\xA6\x6A\x95'):
         return 'rast'
 
 tests.append(test_rast)
 
 def test_xbm(h, f):
-    """X bitmap (X10 or X11)"""
+    """Verify if the image is a X bitmap (X10 or X11)."""
     if h.startswith(b'#define '):
         return 'xbm'
 
 tests.append(test_xbm)
 
 def test_bmp(h, f):
+    """Verify if the image is a BMP file."""
     if h.startswith(b'BM'):
         return 'bmp'
 
 tests.append(test_bmp)
 
 def test_webp(h, f):
+    """Verify if the image is a WebP."""
     if h.startswith(b'RIFF') and h[8:12] == b'WEBP':
         return 'webp'
 
 tests.append(test_webp)
 
 def test_exr(h, f):
+    """verify is the image ia a OpenEXR fileOpenEXR."""
     if h.startswith(b'\x76\x2f\x31\x01'):
         return 'exr'
 
diff --git a/contrib/tools/python3/src/Lib/imp.py b/contrib/tools/python3/src/Lib/imp.py
deleted file mode 100644
index fc42c15765..0000000000
--- a/contrib/tools/python3/src/Lib/imp.py
+++ /dev/null
@@ -1,346 +0,0 @@
-"""This module provides the components needed to build your own __import__
-function.  Undocumented functions are obsolete.
-
-In most cases it is preferred you consider using the importlib module's
-functionality over this module.
-
-"""
-# (Probably) need to stay in _imp
-from _imp import (lock_held, acquire_lock, release_lock,
-                  get_frozen_object, is_frozen_package,
-                  init_frozen, is_builtin, is_frozen,
-                  _fix_co_filename, _frozen_module_names)
-try:
-    from _imp import create_dynamic
-except ImportError:
-    # Platform doesn't support dynamic loading.
-    create_dynamic = None
-
-from importlib._bootstrap import _ERR_MSG, _exec, _load, _builtin_from_name
-from importlib._bootstrap_external import SourcelessFileLoader
-
-from importlib import machinery
-from importlib import util
-import importlib
-import os
-import sys
-import tokenize
-import types
-import warnings
-
-warnings.warn("the imp module is deprecated in favour of importlib and slated "
-              "for removal in Python 3.12; "
-              "see the module's documentation for alternative uses",
-              DeprecationWarning, stacklevel=2)
-
-# DEPRECATED
-SEARCH_ERROR = 0
-PY_SOURCE = 1
-PY_COMPILED = 2
-C_EXTENSION = 3
-PY_RESOURCE = 4
-PKG_DIRECTORY = 5
-C_BUILTIN = 6
-PY_FROZEN = 7
-PY_CODERESOURCE = 8
-IMP_HOOK = 9
-
-
-def new_module(name):
-    """**DEPRECATED**
-
-    Create a new module.
-
-    The module is not entered into sys.modules.
-
-    """
-    return types.ModuleType(name)
-
-
-def get_magic():
-    """**DEPRECATED**
-
-    Return the magic number for .pyc files.
-    """
-    return util.MAGIC_NUMBER
-
-
-def get_tag():
-    """Return the magic tag for .pyc files."""
-    return sys.implementation.cache_tag
-
-
-def cache_from_source(path, debug_override=None):
-    """**DEPRECATED**
-
-    Given the path to a .py file, return the path to its .pyc file.
-
-    The .py file does not need to exist; this simply returns the path to the
-    .pyc file calculated as if the .py file were imported.
-
-    If debug_override is not None, then it must be a boolean and is used in
-    place of sys.flags.optimize.
-
-    If sys.implementation.cache_tag is None then NotImplementedError is raised.
-
-    """
-    with warnings.catch_warnings():
-        warnings.simplefilter('ignore')
-        return util.cache_from_source(path, debug_override)
-
-
-def source_from_cache(path):
-    """**DEPRECATED**
-
-    Given the path to a .pyc. file, return the path to its .py file.
-
-    The .pyc file does not need to exist; this simply returns the path to
-    the .py file calculated to correspond to the .pyc file.  If path does
-    not conform to PEP 3147 format, ValueError will be raised. If
-    sys.implementation.cache_tag is None then NotImplementedError is raised.
-
-    """
-    return util.source_from_cache(path)
-
-
-def get_suffixes():
-    """**DEPRECATED**"""
-    extensions = [(s, 'rb', C_EXTENSION) for s in machinery.EXTENSION_SUFFIXES]
-    source = [(s, 'r', PY_SOURCE) for s in machinery.SOURCE_SUFFIXES]
-    bytecode = [(s, 'rb', PY_COMPILED) for s in machinery.BYTECODE_SUFFIXES]
-
-    return extensions + source + bytecode
-
-
-class NullImporter:
-
-    """**DEPRECATED**
-
-    Null import object.
-
-    """
-
-    def __init__(self, path):
-        if path == '':
-            raise ImportError('empty pathname', path='')
-        elif os.path.isdir(path):
-            raise ImportError('existing directory', path=path)
-
-    def find_module(self, fullname):
-        """Always returns None."""
-        return None
-
-
-class _HackedGetData:
-
-    """Compatibility support for 'file' arguments of various load_*()
-    functions."""
-
-    def __init__(self, fullname, path, file=None):
-        super().__init__(fullname, path)
-        self.file = file
-
-    def get_data(self, path):
-        """Gross hack to contort loader to deal w/ load_*()'s bad API."""
-        if self.file and path == self.path:
-            # The contract of get_data() requires us to return bytes. Reopen the
-            # file in binary mode if needed.
-            if not self.file.closed:
-                file = self.file
-                if 'b' not in file.mode:
-                    file.close()
-            if self.file.closed:
-                self.file = file = open(self.path, 'rb')
-
-            with file:
-                return file.read()
-        else:
-            return super().get_data(path)
-
-
-class _LoadSourceCompatibility(_HackedGetData, machinery.SourceFileLoader):
-
-    """Compatibility support for implementing load_source()."""
-
-
-def load_source(name, pathname, file=None):
-    loader = _LoadSourceCompatibility(name, pathname, file)
-    spec = util.spec_from_file_location(name, pathname, loader=loader)
-    if name in sys.modules:
-        module = _exec(spec, sys.modules[name])
-    else:
-        module = _load(spec)
-    # To allow reloading to potentially work, use a non-hacked loader which
-    # won't rely on a now-closed file object.
-    module.__loader__ = machinery.SourceFileLoader(name, pathname)
-    module.__spec__.loader = module.__loader__
-    return module
-
-
-class _LoadCompiledCompatibility(_HackedGetData, SourcelessFileLoader):
-
-    """Compatibility support for implementing load_compiled()."""
-
-
-def load_compiled(name, pathname, file=None):
-    """**DEPRECATED**"""
-    loader = _LoadCompiledCompatibility(name, pathname, file)
-    spec = util.spec_from_file_location(name, pathname, loader=loader)
-    if name in sys.modules:
-        module = _exec(spec, sys.modules[name])
-    else:
-        module = _load(spec)
-    # To allow reloading to potentially work, use a non-hacked loader which
-    # won't rely on a now-closed file object.
-    module.__loader__ = SourcelessFileLoader(name, pathname)
-    module.__spec__.loader = module.__loader__
-    return module
-
-
-def load_package(name, path):
-    """**DEPRECATED**"""
-    if os.path.isdir(path):
-        extensions = (machinery.SOURCE_SUFFIXES[:] +
-                      machinery.BYTECODE_SUFFIXES[:])
-        for extension in extensions:
-            init_path = os.path.join(path, '__init__' + extension)
-            if os.path.exists(init_path):
-                path = init_path
-                break
-        else:
-            raise ValueError('{!r} is not a package'.format(path))
-    spec = util.spec_from_file_location(name, path,
-                                        submodule_search_locations=[])
-    if name in sys.modules:
-        return _exec(spec, sys.modules[name])
-    else:
-        return _load(spec)
-
-
-def load_module(name, file, filename, details):
-    """**DEPRECATED**
-
-    Load a module, given information returned by find_module().
-
-    The module name must include the full package name, if any.
-
-    """
-    suffix, mode, type_ = details
-    if mode and (not mode.startswith('r') or '+' in mode):
-        raise ValueError('invalid file open mode {!r}'.format(mode))
-    elif file is None and type_ in {PY_SOURCE, PY_COMPILED}:
-        msg = 'file object required for import (type code {})'.format(type_)
-        raise ValueError(msg)
-    elif type_ == PY_SOURCE:
-        return load_source(name, filename, file)
-    elif type_ == PY_COMPILED:
-        return load_compiled(name, filename, file)
-    elif type_ == C_EXTENSION and load_dynamic is not None:
-        if file is None:
-            with open(filename, 'rb') as opened_file:
-                return load_dynamic(name, filename, opened_file)
-        else:
-            return load_dynamic(name, filename, file)
-    elif type_ == PKG_DIRECTORY:
-        return load_package(name, filename)
-    elif type_ == C_BUILTIN:
-        return init_builtin(name)
-    elif type_ == PY_FROZEN:
-        return init_frozen(name)
-    else:
-        msg =  "Don't know how to import {} (type code {})".format(name, type_)
-        raise ImportError(msg, name=name)
-
-
-def find_module(name, path=None):
-    """**DEPRECATED**
-
-    Search for a module.
-
-    If path is omitted or None, search for a built-in, frozen or special
-    module and continue search in sys.path. The module name cannot
-    contain '.'; to search for a submodule of a package, pass the
-    submodule name and the package's __path__.
-
-    """
-    if not isinstance(name, str):
-        raise TypeError("'name' must be a str, not {}".format(type(name)))
-    elif not isinstance(path, (type(None), list)):
-        # Backwards-compatibility
-        raise RuntimeError("'path' must be None or a list, "
-                           "not {}".format(type(path)))
-
-    if path is None:
-        if is_builtin(name):
-            return None, None, ('', '', C_BUILTIN)
-        elif is_frozen(name):
-            return None, None, ('', '', PY_FROZEN)
-        else:
-            path = sys.path
-
-    for entry in path:
-        package_directory = os.path.join(entry, name)
-        for suffix in ['.py', machinery.BYTECODE_SUFFIXES[0]]:
-            package_file_name = '__init__' + suffix
-            file_path = os.path.join(package_directory, package_file_name)
-            if os.path.isfile(file_path):
-                return None, package_directory, ('', '', PKG_DIRECTORY)
-        for suffix, mode, type_ in get_suffixes():
-            file_name = name + suffix
-            file_path = os.path.join(entry, file_name)
-            if os.path.isfile(file_path):
-                break
-        else:
-            continue
-        break  # Break out of outer loop when breaking out of inner loop.
-    else:
-        raise ImportError(_ERR_MSG.format(name), name=name)
-
-    encoding = None
-    if 'b' not in mode:
-        with open(file_path, 'rb') as file:
-            encoding = tokenize.detect_encoding(file.readline)[0]
-    file = open(file_path, mode, encoding=encoding)
-    return file, file_path, (suffix, mode, type_)
-
-
-def reload(module):
-    """**DEPRECATED**
-
-    Reload the module and return it.
-
-    The module must have been successfully imported before.
-
-    """
-    return importlib.reload(module)
-
-
-def init_builtin(name):
-    """**DEPRECATED**
-
-    Load and return a built-in module by name, or None is such module doesn't
-    exist
-    """
-    try:
-        return _builtin_from_name(name)
-    except ImportError:
-        return None
-
-
-if create_dynamic:
-    def load_dynamic(name, path, file=None):
-        """**DEPRECATED**
-
-        Load an extension module.
-        """
-        import importlib.machinery
-        loader = importlib.machinery.ExtensionFileLoader(name, path)
-
-        # Issue #24748: Skip the sys.modules check in _load_module_shim;
-        # always load new extension
-        spec = importlib.machinery.ModuleSpec(
-            name=name, loader=loader, origin=path)
-        return _load(spec)
-
-else:
-    load_dynamic = None
diff --git a/contrib/tools/python3/src/Lib/importlib/__init__.py b/contrib/tools/python3/src/Lib/importlib/__init__.py
index ce61883288..707c081cb2 100644
--- a/contrib/tools/python3/src/Lib/importlib/__init__.py
+++ b/contrib/tools/python3/src/Lib/importlib/__init__.py
@@ -70,41 +70,6 @@ def invalidate_caches():
             finder.invalidate_caches()
 
 
-def find_loader(name, path=None):
-    """Return the loader for the specified module.
-
-    This is a backward-compatible wrapper around find_spec().
-
-    This function is deprecated in favor of importlib.util.find_spec().
-
-    """
-    warnings.warn('Deprecated since Python 3.4 and slated for removal in '
-                  'Python 3.12; use importlib.util.find_spec() instead',
-                  DeprecationWarning, stacklevel=2)
-    try:
-        loader = sys.modules[name].__loader__
-        if loader is None:
-            raise ValueError('{}.__loader__ is None'.format(name))
-        else:
-            return loader
-    except KeyError:
-        pass
-    except AttributeError:
-        raise ValueError('{}.__loader__ is not set'.format(name)) from None
-
-    spec = _bootstrap._find_spec(name, path)
-    # We won't worry about malformed specs (missing attributes).
-    if spec is None:
-        return None
-    if spec.loader is None:
-        if spec.submodule_search_locations is None:
-            raise ImportError('spec for {} missing loader'.format(name),
-                              name=name)
-        raise ImportError('namespace packages do not have loaders',
-                          name=name)
-    return spec.loader
-
-
 def import_module(name, package=None):
     """Import a module.
 
@@ -116,9 +81,8 @@ def import_module(name, package=None):
     level = 0
     if name.startswith('.'):
         if not package:
-            msg = ("the 'package' argument is required to perform a relative "
-                   "import for {!r}")
-            raise TypeError(msg.format(name))
+            raise TypeError("the 'package' argument is required to perform a "
+                            f"relative import for {name!r}")
         for character in name:
             if character != '.':
                 break
@@ -144,8 +108,7 @@ def reload(module):
             raise TypeError("reload() argument must be a module")
 
     if sys.modules.get(name) is not module:
-        msg = "module {} not in sys.modules"
-        raise ImportError(msg.format(name), name=name)
+        raise ImportError(f"module {name} not in sys.modules", name=name)
     if name in _RELOADING:
         return _RELOADING[name]
     _RELOADING[name] = module
@@ -155,8 +118,7 @@ def reload(module):
             try:
                 parent = sys.modules[parent_name]
             except KeyError:
-                msg = "parent {!r} not in sys.modules"
-                raise ImportError(msg.format(parent_name),
+                raise ImportError(f"parent {parent_name!r} not in sys.modules",
                                   name=parent_name) from None
             else:
                 pkgpath = parent.__path__
diff --git a/contrib/tools/python3/src/Lib/importlib/_abc.py b/contrib/tools/python3/src/Lib/importlib/_abc.py
index f80348fc7f..693b466112 100644
--- a/contrib/tools/python3/src/Lib/importlib/_abc.py
+++ b/contrib/tools/python3/src/Lib/importlib/_abc.py
@@ -1,7 +1,6 @@
 """Subset of importlib.abc used to reduce importlib.util imports."""
 from . import _bootstrap
 import abc
-import warnings
 
 
 class Loader(metaclass=abc.ABCMeta):
@@ -38,17 +37,3 @@ class Loader(metaclass=abc.ABCMeta):
             raise ImportError
         # Warning implemented in _load_module_shim().
         return _bootstrap._load_module_shim(self, fullname)
-
-    def module_repr(self, module):
-        """Return a module's repr.
-
-        Used by the module type when the method does not raise
-        NotImplementedError.
-
-        This method is deprecated.
-
-        """
-        warnings.warn("importlib.abc.Loader.module_repr() is deprecated and "
-                      "slated for removal in Python 3.12", DeprecationWarning)
-        # The exception will cause ModuleType.__repr__ to ignore this method.
-        raise NotImplementedError
diff --git a/contrib/tools/python3/src/Lib/importlib/_bootstrap.py b/contrib/tools/python3/src/Lib/importlib/_bootstrap.py
index ee93ebc396..d942045f3d 100644
--- a/contrib/tools/python3/src/Lib/importlib/_bootstrap.py
+++ b/contrib/tools/python3/src/Lib/importlib/_bootstrap.py
@@ -51,17 +51,178 @@ def _new_module(name):
 
 # Module-level locking ########################################################
 
-# A dict mapping module names to weakrefs of _ModuleLock instances
-# Dictionary protected by the global import lock
+# For a list that can have a weakref to it.
+class _List(list):
+    pass
+
+
+# Copied from weakref.py with some simplifications and modifications unique to
+# bootstrapping importlib. Many methods were simply deleting for simplicity, so if they
+# are needed in the future they may work if simply copied back in.
+class _WeakValueDictionary:
+
+    def __init__(self):
+        self_weakref = _weakref.ref(self)
+
+        # Inlined to avoid issues with inheriting from _weakref.ref before _weakref is
+        # set by _setup(). Since there's only one instance of this class, this is
+        # not expensive.
+        class KeyedRef(_weakref.ref):
+
+            __slots__ = "key",
+
+            def __new__(type, ob, key):
+                self = super().__new__(type, ob, type.remove)
+                self.key = key
+                return self
+
+            def __init__(self, ob, key):
+                super().__init__(ob, self.remove)
+
+            @staticmethod
+            def remove(wr):
+                nonlocal self_weakref
+
+                self = self_weakref()
+                if self is not None:
+                    if self._iterating:
+                        self._pending_removals.append(wr.key)
+                    else:
+                        _weakref._remove_dead_weakref(self.data, wr.key)
+
+        self._KeyedRef = KeyedRef
+        self.clear()
+
+    def clear(self):
+        self._pending_removals = []
+        self._iterating = set()
+        self.data = {}
+
+    def _commit_removals(self):
+        pop = self._pending_removals.pop
+        d = self.data
+        while True:
+            try:
+                key = pop()
+            except IndexError:
+                return
+            _weakref._remove_dead_weakref(d, key)
+
+    def get(self, key, default=None):
+        if self._pending_removals:
+            self._commit_removals()
+        try:
+            wr = self.data[key]
+        except KeyError:
+            return default
+        else:
+            if (o := wr()) is None:
+                return default
+            else:
+                return o
+
+    def setdefault(self, key, default=None):
+        try:
+            o = self.data[key]()
+        except KeyError:
+            o = None
+        if o is None:
+            if self._pending_removals:
+                self._commit_removals()
+            self.data[key] = self._KeyedRef(default, key)
+            return default
+        else:
+            return o
+
+
+# A dict mapping module names to weakrefs of _ModuleLock instances.
+# Dictionary protected by the global import lock.
 _module_locks = {}
-# A dict mapping thread ids to _ModuleLock instances
-_blocking_on = {}
+
+# A dict mapping thread IDs to weakref'ed lists of _ModuleLock instances.
+# This maps a thread to the module locks it is blocking on acquiring.  The
+# values are lists because a single thread could perform a re-entrant import
+# and be "in the process" of blocking on locks for more than one module.  A
+# thread can be "in the process" because a thread cannot actually block on
+# acquiring more than one lock but it can have set up bookkeeping that reflects
+# that it intends to block on acquiring more than one lock.
+#
+# The dictionary uses a WeakValueDictionary to avoid keeping unnecessary
+# lists around, regardless of GC runs. This way there's no memory leak if
+# the list is no longer needed (GH-106176).
+_blocking_on = None
+
+
+class _BlockingOnManager:
+    """A context manager responsible to updating ``_blocking_on``."""
+    def __init__(self, thread_id, lock):
+        self.thread_id = thread_id
+        self.lock = lock
+
+    def __enter__(self):
+        """Mark the running thread as waiting for self.lock. via _blocking_on."""
+        # Interactions with _blocking_on are *not* protected by the global
+        # import lock here because each thread only touches the state that it
+        # owns (state keyed on its thread id).  The global import lock is
+        # re-entrant (i.e., a single thread may take it more than once) so it
+        # wouldn't help us be correct in the face of re-entrancy either.
+
+        self.blocked_on = _blocking_on.setdefault(self.thread_id, _List())
+        self.blocked_on.append(self.lock)
+
+    def __exit__(self, *args, **kwargs):
+        """Remove self.lock from this thread's _blocking_on list."""
+        self.blocked_on.remove(self.lock)
 
 
 class _DeadlockError(RuntimeError):
     pass
 
 
+
+def _has_deadlocked(target_id, *, seen_ids, candidate_ids, blocking_on):
+    """Check if 'target_id' is holding the same lock as another thread(s).
+
+    The search within 'blocking_on' starts with the threads listed in
+    'candidate_ids'.  'seen_ids' contains any threads that are considered
+    already traversed in the search.
+
+    Keyword arguments:
+    target_id     -- The thread id to try to reach.
+    seen_ids      -- A set of threads that have already been visited.
+    candidate_ids -- The thread ids from which to begin.
+    blocking_on   -- A dict representing the thread/blocking-on graph.  This may
+                     be the same object as the global '_blocking_on' but it is
+                     a parameter to reduce the impact that global mutable
+                     state has on the result of this function.
+    """
+    if target_id in candidate_ids:
+        # If we have already reached the target_id, we're done - signal that it
+        # is reachable.
+        return True
+
+    # Otherwise, try to reach the target_id from each of the given candidate_ids.
+    for tid in candidate_ids:
+        if not (candidate_blocking_on := blocking_on.get(tid)):
+            # There are no edges out from this node, skip it.
+            continue
+        elif tid in seen_ids:
+            # bpo 38091: the chain of tid's we encounter here eventually leads
+            # to a fixed point or a cycle, but does not reach target_id.
+            # This means we would not actually deadlock.  This can happen if
+            # other threads are at the beginning of acquire() below.
+            return False
+        seen_ids.add(tid)
+
+        # Follow the edges out from this thread.
+        edges = [lock.owner for lock in candidate_blocking_on]
+        if _has_deadlocked(target_id, seen_ids=seen_ids, candidate_ids=edges,
+                blocking_on=blocking_on):
+            return True
+
+    return False
+
+
 class _ModuleLock:
     """A recursive lock implementation which is able to detect deadlocks
     (e.g. thread 1 trying to take locks A then B, and thread 2 trying to
@@ -69,33 +230,76 @@ class _ModuleLock:
     """
 
     def __init__(self, name):
-        self.lock = _thread.allocate_lock()
+        # Create an RLock for protecting the import process for the
+        # corresponding module.  Since it is an RLock, a single thread will be
+        # able to take it more than once.  This is necessary to support
+        # re-entrancy in the import system that arises from (at least) signal
+        # handlers and the garbage collector.  Consider the case of:
+        #
+        #  import foo
+        #  -> ...
+        #     -> importlib._bootstrap._ModuleLock.acquire
+        #        -> ...
+        #           -> <garbage collector>
+        #              -> __del__
+        #                 -> import foo
+        #                    -> ...
+        #                       -> importlib._bootstrap._ModuleLock.acquire
+        #                          -> _BlockingOnManager.__enter__
+        #
+        # If a different thread than the running one holds the lock then the
+        # thread will have to block on taking the lock, which is what we want
+        # for thread safety.
+        self.lock = _thread.RLock()
         self.wakeup = _thread.allocate_lock()
+
+        # The name of the module for which this is a lock.
         self.name = name
+
+        # Can end up being set to None if this lock is not owned by any thread
+        # or the thread identifier for the owning thread.
         self.owner = None
-        self.count = 0
-        self.waiters = 0
+
+        # Represent the number of times the owning thread has acquired this lock
+        # via a list of True.  This supports RLock-like ("re-entrant lock")
+        # behavior, necessary in case a single thread is following a circular
+        # import dependency and needs to take the lock for a single module
+        # more than once.
+        #
+        # Counts are represented as a list of True because list.append(True)
+        # and list.pop() are both atomic and thread-safe in CPython and it's hard
+        # to find another primitive with the same properties.
+        self.count = []
+
+        # This is a count of the number of threads that are blocking on
+        # self.wakeup.acquire() awaiting to get their turn holding this module
+        # lock.  When the module lock is released, if this is greater than
+        # zero, it is decremented and `self.wakeup` is released one time.  The
+        # intent is that this will let one other thread make more progress on
+        # acquiring this module lock.  This repeats until all the threads have
+        # gotten a turn.
+        #
+        # This is incremented in self.acquire() when a thread notices it is
+        # going to have to wait for another thread to finish.
+        #
+        # See the comment above count for explanation of the representation.
+        self.waiters = []
 
     def has_deadlock(self):
-        # Deadlock avoidance for concurrent circular imports.
-        me = _thread.get_ident()
-        tid = self.owner
-        seen = set()
-        while True:
-            lock = _blocking_on.get(tid)
-            if lock is None:
-                return False
-            tid = lock.owner
-            if tid == me:
-                return True
-            if tid in seen:
-                # bpo 38091: the chain of tid's we encounter here
-                # eventually leads to a fixpoint or a cycle, but
-                # does not reach 'me'.  This means we would not
-                # actually deadlock.  This can happen if other
-                # threads are at the beginning of acquire() below.
-                return False
-            seen.add(tid)
+        # To avoid deadlocks for concurrent or re-entrant circular imports,
+        # look at _blocking_on to see if any threads are blocking
+        # on getting the import lock for any module for which the import lock
+        # is held by this thread.
+        return _has_deadlocked(
+            # Try to find this thread.
+            target_id=_thread.get_ident(),
+            seen_ids=set(),
+            # Start from the thread that holds the import lock for this
+            # module.
+            candidate_ids=[self.owner],
+            # Use the global "blocking on" state.
+            blocking_on=_blocking_on,
+        )
 
     def acquire(self):
         """
@@ -104,39 +308,82 @@ class _ModuleLock:
         Otherwise, the lock is always acquired and True is returned.
         """
         tid = _thread.get_ident()
-        _blocking_on[tid] = self
-        try:
+        with _BlockingOnManager(tid, self):
             while True:
+                # Protect interaction with state on self with a per-module
+                # lock.  This makes it safe for more than one thread to try to
+                # acquire the lock for a single module at the same time.
                 with self.lock:
-                    if self.count == 0 or self.owner == tid:
+                    if self.count == [] or self.owner == tid:
+                        # If the lock for this module is unowned then we can
+                        # take the lock immediately and succeed.  If the lock
+                        # for this module is owned by the running thread then
+                        # we can also allow the acquire to succeed.  This
+                        # supports circular imports (thread T imports module A
+                        # which imports module B which imports module A).
                         self.owner = tid
-                        self.count += 1
+                        self.count.append(True)
                         return True
+
+                    # At this point we know the lock is held (because count !=
+                    # 0) by another thread (because owner != tid).  We'll have
+                    # to get in line to take the module lock.
+
+                    # But first, check to see if this thread would create a
+                    # deadlock by acquiring this module lock.  If it would
+                    # then just stop with an error.
+                    #
+                    # It's not clear who is expected to handle this error.
+                    # There is one handler in _lock_unlock_module but many
+                    # times this method is called when entering the context
+                    # manager _ModuleLockManager instead - so _DeadlockError
+                    # will just propagate up to application code.
+                    #
+                    # This seems to be more than just a hypothetical -
+                    # https://stackoverflow.com/questions/59509154
+                    # https://github.com/encode/django-rest-framework/issues/7078
                     if self.has_deadlock():
-                        raise _DeadlockError('deadlock detected by %r' % self)
+                        raise _DeadlockError(f'deadlock detected by {self!r}')
+
+                    # Check to see if we're going to be able to acquire the
+                    # lock.  If we are going to have to wait then increment
+                    # the waiters so `self.release` will know to unblock us
+                    # later on.  We do this part non-blockingly so we don't
+                    # get stuck here before we increment waiters.  We have
+                    # this extra acquire call (in addition to the one below,
+                    # outside the self.lock context manager) to make sure
+                    # self.wakeup is held when the next acquire is called (so
+                    # we block).  This is probably needlessly complex and we
+                    # should just take self.wakeup in the return codepath
+                    # above.
                     if self.wakeup.acquire(False):
-                        self.waiters += 1
-                # Wait for a release() call
+                        self.waiters.append(None)
+
+                # Now take the lock in a blocking fashion.  This won't
+                # complete until the thread holding this lock
+                # (self.owner) calls self.release.
                 self.wakeup.acquire()
+
+                # Taking the lock has served its purpose (making us wait), so we can
+                # give it up now.  We'll take it w/o blocking again on the
+                # next iteration around this 'while' loop.
                 self.wakeup.release()
-        finally:
-            del _blocking_on[tid]
 
     def release(self):
         tid = _thread.get_ident()
         with self.lock:
             if self.owner != tid:
                 raise RuntimeError('cannot release un-acquired lock')
-            assert self.count > 0
-            self.count -= 1
-            if self.count == 0:
+            assert len(self.count) > 0
+            self.count.pop()
+            if not len(self.count):
                 self.owner = None
-                if self.waiters:
-                    self.waiters -= 1
+                if len(self.waiters) > 0:
+                    self.waiters.pop()
                     self.wakeup.release()
 
     def __repr__(self):
-        return '_ModuleLock({!r}) at {}'.format(self.name, id(self))
+        return f'_ModuleLock({self.name!r}) at {id(self)}'
 
 
 class _DummyModuleLock:
@@ -157,7 +404,7 @@ class _DummyModuleLock:
         self.count -= 1
 
     def __repr__(self):
-        return '_DummyModuleLock({!r}) at {}'.format(self.name, id(self))
+        return f'_DummyModuleLock({self.name!r}) at {id(self)}'
 
 
 class _ModuleLockManager:
@@ -253,7 +500,7 @@ def _requires_builtin(fxn):
     """Decorator to verify the named module is built-in."""
     def _requires_builtin_wrapper(self, fullname):
         if fullname not in sys.builtin_module_names:
-            raise ImportError('{!r} is not a built-in module'.format(fullname),
+            raise ImportError(f'{fullname!r} is not a built-in module',
                               name=fullname)
         return fxn(self, fullname)
     _wrap(_requires_builtin_wrapper, fxn)
@@ -264,7 +511,7 @@ def _requires_frozen(fxn):
     """Decorator to verify the named module is frozen."""
     def _requires_frozen_wrapper(self, fullname):
         if not _imp.is_frozen(fullname):
-            raise ImportError('{!r} is not a frozen module'.format(fullname),
+            raise ImportError(f'{fullname!r} is not a frozen module',
                               name=fullname)
         return fxn(self, fullname)
     _wrap(_requires_frozen_wrapper, fxn)
@@ -296,11 +543,6 @@ def _module_repr(module):
     loader = getattr(module, '__loader__', None)
     if spec := getattr(module, "__spec__", None):
         return _module_repr_from_spec(spec)
-    elif hasattr(loader, 'module_repr'):
-        try:
-            return loader.module_repr(module)
-        except Exception:
-            pass
     # Fall through to a catch-all which always succeeds.
     try:
         name = module.__name__
@@ -310,11 +552,11 @@ def _module_repr(module):
         filename = module.__file__
     except AttributeError:
         if loader is None:
-            return '<module {!r}>'.format(name)
+            return f'<module {name!r}>'
         else:
-            return '<module {!r} ({!r})>'.format(name, loader)
+            return f'<module {name!r} ({loader!r})>'
     else:
-        return '<module {!r} from {!r}>'.format(name, filename)
+        return f'<module {name!r} from {filename!r}>'
 
 
 class ModuleSpec:
@@ -368,14 +610,12 @@ class ModuleSpec:
         self._cached = None
 
     def __repr__(self):
-        args = ['name={!r}'.format(self.name),
-                'loader={!r}'.format(self.loader)]
+        args = [f'name={self.name!r}', f'loader={self.loader!r}']
         if self.origin is not None:
-            args.append('origin={!r}'.format(self.origin))
+            args.append(f'origin={self.origin!r}')
         if self.submodule_search_locations is not None:
-            args.append('submodule_search_locations={}'
-                        .format(self.submodule_search_locations))
-        return '{}({})'.format(self.__class__.__name__, ', '.join(args))
+            args.append(f'submodule_search_locations={self.submodule_search_locations}')
+        return f'{self.__class__.__name__}({", ".join(args)})'
 
     def __eq__(self, other):
         smsl = self.submodule_search_locations
@@ -582,18 +822,23 @@ def module_from_spec(spec):
 
 def _module_repr_from_spec(spec):
     """Return the repr to use for the module."""
-    # We mostly replicate _module_repr() using the spec attributes.
     name = '?' if spec.name is None else spec.name
     if spec.origin is None:
-        if spec.loader is None:
-            return '<module {!r}>'.format(name)
+        loader = spec.loader
+        if loader is None:
+            return f'<module {name!r}>'
+        elif (
+            _bootstrap_external is not None
+            and isinstance(loader, _bootstrap_external.NamespaceLoader)
+        ):
+            return f'<module {name!r} (namespace) from {list(loader._path)}>'
         else:
-            return '<module {!r} ({!r})>'.format(name, spec.loader)
+            return f'<module {name!r} ({loader!r})>'
     else:
         if spec.has_location:
-            return '<module {!r} from {!r}>'.format(name, spec.origin)
+            return f'<module {name!r} from {spec.origin!r}>'
         else:
-            return '<module {!r} ({})>'.format(spec.name, spec.origin)
+            return f'<module {spec.name!r} ({spec.origin})>'
 
 
 # Used by importlib.reload() and _load_module_shim().
@@ -602,7 +847,7 @@ def _exec(spec, module):
     name = spec.name
     with _ModuleLockManager(name):
         if sys.modules.get(name) is not module:
-            msg = 'module {!r} not in sys.modules'.format(name)
+            msg = f'module {name!r} not in sys.modules'
             raise ImportError(msg, name=name)
         try:
             if spec.loader is None:
@@ -734,17 +979,6 @@ class BuiltinImporter:
 
     _ORIGIN = "built-in"
 
-    @staticmethod
-    def module_repr(module):
-        """Return repr for the module.
-
-        The method is deprecated.  The import machinery does the job itself.
-
-        """
-        _warnings.warn("BuiltinImporter.module_repr() is deprecated and "
-                       "slated for removal in Python 3.12", DeprecationWarning)
-        return f'<module {module.__name__!r} ({BuiltinImporter._ORIGIN})>'
-
     @classmethod
     def find_spec(cls, fullname, path=None, target=None):
         if _imp.is_builtin(fullname):
@@ -752,26 +986,11 @@ class BuiltinImporter:
         else:
             return None
 
-    @classmethod
-    def find_module(cls, fullname, path=None):
-        """Find the built-in module.
-
-        If 'path' is ever specified then the search is considered a failure.
-
-        This method is deprecated.  Use find_spec() instead.
-
-        """
-        _warnings.warn("BuiltinImporter.find_module() is deprecated and "
-                       "slated for removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        spec = cls.find_spec(fullname, path)
-        return spec.loader if spec is not None else None
-
     @staticmethod
     def create_module(spec):
         """Create a built-in module"""
         if spec.name not in sys.builtin_module_names:
-            raise ImportError('{!r} is not a built-in module'.format(spec.name),
+            raise ImportError(f'{spec.name!r} is not a built-in module',
                               name=spec.name)
         return _call_with_frames_removed(_imp.create_builtin, spec)
 
@@ -812,17 +1031,6 @@ class FrozenImporter:
 
     _ORIGIN = "frozen"
 
-    @staticmethod
-    def module_repr(m):
-        """Return repr for the module.
-
-        The method is deprecated.  The import machinery does the job itself.
-
-        """
-        _warnings.warn("FrozenImporter.module_repr() is deprecated and "
-                       "slated for removal in Python 3.12", DeprecationWarning)
-        return '<module {!r} ({})>'.format(m.__name__, FrozenImporter._ORIGIN)
-
     @classmethod
     def _fix_up_module(cls, module):
         spec = module.__spec__
@@ -947,18 +1155,6 @@ class FrozenImporter:
             spec.submodule_search_locations.insert(0, pkgdir)
         return spec
 
-    @classmethod
-    def find_module(cls, fullname, path=None):
-        """Find a frozen module.
-
-        This method is deprecated.  Use find_spec() instead.
-
-        """
-        _warnings.warn("FrozenImporter.find_module() is deprecated and "
-                       "slated for removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        return cls if _imp.is_frozen(fullname) else None
-
     @staticmethod
     def create_module(spec):
         """Set __file__, if able."""
@@ -1038,17 +1234,7 @@ def _resolve_name(name, package, level):
     if len(bits) < level:
         raise ImportError('attempted relative import beyond top-level package')
     base = bits[0]
-    return '{}.{}'.format(base, name) if name else base
-
-
-def _find_spec_legacy(finder, name, path):
-    msg = (f"{_object_name(finder)}.find_spec() not found; "
-                           "falling back to find_module()")
-    _warnings.warn(msg, ImportWarning)
-    loader = finder.find_module(name, path)
-    if loader is None:
-        return None
-    return spec_from_loader(name, loader)
+    return f'{base}.{name}' if name else base
 
 
 def _find_spec(name, path, target=None):
@@ -1071,9 +1257,7 @@ def _find_spec(name, path, target=None):
             try:
                 find_spec = finder.find_spec
             except AttributeError:
-                spec = _find_spec_legacy(finder, name, path)
-                if spec is None:
-                    continue
+                continue
             else:
                 spec = find_spec(name, path, target)
         if spec is not None:
@@ -1101,7 +1285,7 @@ def _find_spec(name, path, target=None):
 def _sanity_check(name, package, level):
     """Verify arguments are "sane"."""
     if not isinstance(name, str):
-        raise TypeError('module name must be str, not {}'.format(type(name)))
+        raise TypeError(f'module name must be str, not {type(name)}')
     if level < 0:
         raise ValueError('level must be >= 0')
     if level > 0:
@@ -1131,13 +1315,13 @@ def _find_and_load_unlocked(name, import_):
         try:
             path = parent_module.__path__
         except AttributeError:
-            msg = (_ERR_MSG + '; {!r} is not a package').format(name, parent)
+            msg = f'{_ERR_MSG_PREFIX}{name!r}; {parent!r} is not a package'
             raise ModuleNotFoundError(msg, name=name) from None
         parent_spec = parent_module.__spec__
         child = name.rpartition('.')[2]
     spec = _find_spec(name, path)
     if spec is None:
-        raise ModuleNotFoundError(_ERR_MSG.format(name), name=name)
+        raise ModuleNotFoundError(f'{_ERR_MSG_PREFIX}{name!r}', name=name)
     else:
         if parent_spec:
             # Temporarily add child we are currently importing to parent's
@@ -1182,8 +1366,7 @@ def _find_and_load(name, import_):
         _lock_unlock_module(name)
 
     if module is None:
-        message = ('import of {} halted; '
-                   'None in sys.modules'.format(name))
+        message = f'import of {name} halted; None in sys.modules'
         raise ModuleNotFoundError(message, name=name)
 
     return module
@@ -1227,7 +1410,7 @@ def _handle_fromlist(module, fromlist, import_, *, recursive=False):
                 _handle_fromlist(module, module.__all__, import_,
                                  recursive=True)
         elif not hasattr(module, x):
-            from_name = '{}.{}'.format(module.__name__, x)
+            from_name = f'{module.__name__}.{x}'
             try:
                 _call_with_frames_removed(import_, from_name)
             except ModuleNotFoundError as exc:
@@ -1254,7 +1437,7 @@ def _calc___package__(globals):
         if spec is not None and package != spec.parent:
             _warnings.warn("__package__ != __spec__.parent "
                            f"({package!r} != {spec.parent!r})",
-                           ImportWarning, stacklevel=3)
+                           DeprecationWarning, stacklevel=3)
         return package
     elif spec is not None:
         return spec.parent
@@ -1320,7 +1503,7 @@ def _setup(sys_module, _imp_module):
     modules, those two modules must be explicitly passed in.
 
     """
-    global _imp, sys
+    global _imp, sys, _blocking_on
     _imp = _imp_module
     sys = sys_module
 
@@ -1348,6 +1531,9 @@ def _setup(sys_module, _imp_module):
             builtin_module = sys.modules[builtin_name]
         setattr(self_module, builtin_name, builtin_module)
 
+    # Instantiation requires _weakref to have been set.
+    _blocking_on = _WeakValueDictionary()
+
 
 def _install(sys_module, _imp_module):
     """Install importers for builtin and frozen modules"""
diff --git a/contrib/tools/python3/src/Lib/importlib/_bootstrap_external.py b/contrib/tools/python3/src/Lib/importlib/_bootstrap_external.py
index f603a89f7f..e6f75a9f6f 100644
--- a/contrib/tools/python3/src/Lib/importlib/_bootstrap_external.py
+++ b/contrib/tools/python3/src/Lib/importlib/_bootstrap_external.py
@@ -182,12 +182,22 @@ else:
         return path.startswith(path_separators)
 
 
+def _path_abspath(path):
+    """Replacement for os.path.abspath."""
+    if not _path_isabs(path):
+        for sep in path_separators:
+            path = path.removeprefix(f".{sep}")
+        return _path_join(_os.getcwd(), path)
+    else:
+        return path
+
+
 def _write_atomic(path, data, mode=0o666):
     """Best-effort function to write data to a path atomically.
     Be prepared to handle a FileExistsError if concurrent writing of the
     temporary file is attempted."""
     # id() is used to generate a pseudo-random filename.
-    path_tmp = '{}.{}'.format(path, id(path))
+    path_tmp = f'{path}.{id(path)}'
     fd = _os.open(path_tmp,
                   _os.O_EXCL | _os.O_CREAT | _os.O_WRONLY, mode & 0o666)
     try:
@@ -404,10 +414,45 @@ _code_type = type(_write_atomic.__code__)
 #     Python 3.11a7 3493 (Make JUMP_IF_TRUE_OR_POP/JUMP_IF_FALSE_OR_POP relative)
 #     Python 3.11a7 3494 (New location info table)
 #     Python 3.11b4 3495 (Set line number of module's RESUME instr to 0 per PEP 626)
-#     Python 3.12 will start with magic number 3500
-
+#     Python 3.12a1 3500 (Remove PRECALL opcode)
+#     Python 3.12a1 3501 (YIELD_VALUE oparg == stack_depth)
+#     Python 3.12a1 3502 (LOAD_FAST_CHECK, no NULL-check in LOAD_FAST)
+#     Python 3.12a1 3503 (Shrink LOAD_METHOD cache)
+#     Python 3.12a1 3504 (Merge LOAD_METHOD back into LOAD_ATTR)
+#     Python 3.12a1 3505 (Specialization/Cache for FOR_ITER)
+#     Python 3.12a1 3506 (Add BINARY_SLICE and STORE_SLICE instructions)
+#     Python 3.12a1 3507 (Set lineno of module's RESUME to 0)
+#     Python 3.12a1 3508 (Add CLEANUP_THROW)
+#     Python 3.12a1 3509 (Conditional jumps only jump forward)
+#     Python 3.12a2 3510 (FOR_ITER leaves iterator on the stack)
+#     Python 3.12a2 3511 (Add STOPITERATION_ERROR instruction)
+#     Python 3.12a2 3512 (Remove all unused consts from code objects)
+#     Python 3.12a4 3513 (Add CALL_INTRINSIC_1 instruction, removed STOPITERATION_ERROR, PRINT_EXPR, IMPORT_STAR)
+#     Python 3.12a4 3514 (Remove ASYNC_GEN_WRAP, LIST_TO_TUPLE, and UNARY_POSITIVE)
+#     Python 3.12a5 3515 (Embed jump mask in COMPARE_OP oparg)
+#     Python 3.12a5 3516 (Add COMPARE_AND_BRANCH instruction)
+#     Python 3.12a5 3517 (Change YIELD_VALUE oparg to exception block depth)
+#     Python 3.12a6 3518 (Add RETURN_CONST instruction)
+#     Python 3.12a6 3519 (Modify SEND instruction)
+#     Python 3.12a6 3520 (Remove PREP_RERAISE_STAR, add CALL_INTRINSIC_2)
+#     Python 3.12a7 3521 (Shrink the LOAD_GLOBAL caches)
+#     Python 3.12a7 3522 (Removed JUMP_IF_FALSE_OR_POP/JUMP_IF_TRUE_OR_POP)
+#     Python 3.12a7 3523 (Convert COMPARE_AND_BRANCH back to COMPARE_OP)
+#     Python 3.12a7 3524 (Shrink the BINARY_SUBSCR caches)
+#     Python 3.12b1 3525 (Shrink the CALL caches)
+#     Python 3.12b1 3526 (Add instrumentation support)
+#     Python 3.12b1 3527 (Add LOAD_SUPER_ATTR)
+#     Python 3.12b1 3528 (Add LOAD_SUPER_ATTR_METHOD specialization)
+#     Python 3.12b1 3529 (Inline list/dict/set comprehensions)
+#     Python 3.12b1 3530 (Shrink the LOAD_SUPER_ATTR caches)
+#     Python 3.12b1 3531 (Add PEP 695 changes)
+
+#     Python 3.13 will start with 3550
+
+#     Please don't copy-paste the same pre-release tag for new entries above!!!
+#     You should always use the *upcoming* tag. For example, if 3.12a6 came out
+#     a week ago, I should put "Python 3.12a7" next to my new magic number.
 
-#
 # MAGIC must change whenever the bytecode emitted by the compiler may no
 # longer be understood by older implementations of the eval loop (usually
 # due to the addition of new opcodes).
@@ -417,7 +462,7 @@ _code_type = type(_write_atomic.__code__)
 # Whenever MAGIC_NUMBER is changed, the ranges in the magic_values array
 # in PC/launcher.c must also be updated.
 
-MAGIC_NUMBER = (3495).to_bytes(2, 'little') + b'\r\n'
+MAGIC_NUMBER = (3531).to_bytes(2, 'little') + b'\r\n'
 
 _RAW_MAGIC_NUMBER = int.from_bytes(MAGIC_NUMBER, 'little')  # For import.c
 
@@ -474,8 +519,8 @@ def cache_from_source(path, debug_override=None, *, optimization=None):
     optimization = str(optimization)
     if optimization != '':
         if not optimization.isalnum():
-            raise ValueError('{!r} is not alphanumeric'.format(optimization))
-        almost_filename = '{}.{}{}'.format(almost_filename, _OPT, optimization)
+            raise ValueError(f'{optimization!r} is not alphanumeric')
+        almost_filename = f'{almost_filename}.{_OPT}{optimization}'
     filename = almost_filename + BYTECODE_SUFFIXES[0]
     if sys.pycache_prefix is not None:
         # We need an absolute path to the py file to avoid the possibility of
@@ -486,8 +531,7 @@ def cache_from_source(path, debug_override=None, *, optimization=None):
         # make it absolute (`C:\Somewhere\Foo\Bar`), then make it root-relative
         # (`Somewhere\Foo\Bar`), so we end up placing the bytecode file in an
         # unambiguous `C:\Bytecode\Somewhere\Foo\Bar\`.
-        if not _path_isabs(head):
-            head = _path_join(_os.getcwd(), head)
+        head = _path_abspath(head)
 
         # Strip initial drive from a Windows path. We know we have an absolute
         # path here, so the second part of the check rules out a POSIX path that
@@ -619,26 +663,6 @@ def _check_name(method):
     return _check_name_wrapper
 
 
-def _find_module_shim(self, fullname):
-    """Try to find a loader for the specified module by delegating to
-    self.find_loader().
-
-    This method is deprecated in favor of finder.find_spec().
-
-    """
-    _warnings.warn("find_module() is deprecated and "
-                   "slated for removal in Python 3.12; use find_spec() instead",
-                   DeprecationWarning)
-    # Call find_loader(). If it returns a string (indicating this
-    # is a namespace package portion), generate a warning and
-    # return None.
-    loader, portions = self.find_loader(fullname)
-    if loader is None and len(portions):
-        msg = 'Not importing directory {}: missing __init__'
-        _warnings.warn(msg.format(portions[0]), ImportWarning)
-    return loader
-
-
 def _classify_pyc(data, name, exc_details):
     """Perform basic validity checking of a pyc header and return the flags field,
     which determines how the pyc should be further validated against the source.
@@ -733,7 +757,7 @@ def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None):
             _imp._fix_co_filename(code, source_path)
         return code
     else:
-        raise ImportError('Non-code object in {!r}'.format(bytecode_path),
+        raise ImportError(f'Non-code object in {bytecode_path!r}',
                           name=name, path=bytecode_path)
 
 
@@ -800,11 +824,10 @@ def spec_from_file_location(name, location=None, *, loader=None,
                 pass
     else:
         location = _os.fspath(location)
-        if not _path_isabs(location):
-            try:
-                location = _path_join(_os.getcwd(), location)
-            except OSError:
-                pass
+        try:
+            location = _path_abspath(location)
+        except OSError:
+            pass
 
     # If the location is on the filesystem, but doesn't actually exist,
     # we could return None here, indicating that the location is not
@@ -846,6 +869,54 @@ def spec_from_file_location(name, location=None, *, loader=None,
     return spec
 
 
+def _bless_my_loader(module_globals):
+    """Helper function for _warnings.c
+
+    See GH#97850 for details.
+    """
+    # 2022-10-06(warsaw): For now, this helper is only used in _warnings.c and
+    # that use case only has the module globals.  This function could be
+    # extended to accept either that or a module object.  However, in the
+    # latter case, it would be better to raise certain exceptions when looking
+    # at a module, which should have either a __loader__ or __spec__.loader.
+    # For backward compatibility, it is possible that we'll get an empty
+    # dictionary for the module globals, and that cannot raise an exception.
+    if not isinstance(module_globals, dict):
+        return None
+
+    missing = object()
+    loader = module_globals.get('__loader__', None)
+    spec = module_globals.get('__spec__', missing)
+
+    if loader is None:
+        if spec is missing:
+            # If working with a module:
+            # raise AttributeError('Module globals is missing a __spec__')
+            return None
+        elif spec is None:
+            raise ValueError('Module globals is missing a __spec__.loader')
+
+    spec_loader = getattr(spec, 'loader', missing)
+
+    if spec_loader in (missing, None):
+        if loader is None:
+            exc = AttributeError if spec_loader is missing else ValueError
+            raise exc('Module globals is missing a __spec__.loader')
+        _warnings.warn(
+            'Module globals is missing a __spec__.loader',
+            DeprecationWarning)
+        spec_loader = loader
+
+    assert spec_loader is not None
+    if loader is not None and loader != spec_loader:
+        _warnings.warn(
+            'Module globals; __loader__ != __spec__.loader',
+            DeprecationWarning)
+        return loader
+
+    return spec_loader
+
+
 # Loaders #####################################################################
 
 class WindowsRegistryFinder:
@@ -898,22 +969,6 @@ class WindowsRegistryFinder:
                                                    origin=filepath)
                 return spec
 
-    @classmethod
-    def find_module(cls, fullname, path=None):
-        """Find module named in the registry.
-
-        This method is deprecated.  Use find_spec() instead.
-
-        """
-        _warnings.warn("WindowsRegistryFinder.find_module() is deprecated and "
-                       "slated for removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        spec = cls.find_spec(fullname, path)
-        if spec is not None:
-            return spec.loader
-        else:
-            return None
-
 
 class _LoaderBasics:
 
@@ -935,8 +990,8 @@ class _LoaderBasics:
         """Execute the module."""
         code = self.get_code(module.__name__)
         if code is None:
-            raise ImportError('cannot load module {!r} when get_code() '
-                              'returns None'.format(module.__name__))
+            raise ImportError(f'cannot load module {module.__name__!r} when '
+                              'get_code() returns None')
         _bootstrap._call_with_frames_removed(exec, code, module.__dict__)
 
     def load_module(self, fullname):
@@ -1077,7 +1132,8 @@ class SourceLoader(_LoaderBasics):
                 source_mtime is not None):
             if hash_based:
                 if source_hash is None:
-                    source_hash = _imp.source_hash(source_bytes)
+                    source_hash = _imp.source_hash(_RAW_MAGIC_NUMBER,
+                                                   source_bytes)
                 data = _code_to_hash_pyc(code_object, source_hash, check_source)
             else:
                 data = _code_to_timestamp_pyc(code_object, source_mtime,
@@ -1321,7 +1377,7 @@ class _NamespacePath:
         return len(self._recalculate())
 
     def __repr__(self):
-        return '_NamespacePath({!r})'.format(self._path)
+        return f'_NamespacePath({self._path!r})'
 
     def __contains__(self, item):
         return item in self._recalculate()
@@ -1332,22 +1388,11 @@ class _NamespacePath:
 
 # This class is actually exposed publicly in a namespace package's __loader__
 # attribute, so it should be available through a non-private name.
-# https://bugs.python.org/issue35673
+# https://github.com/python/cpython/issues/92054
 class NamespaceLoader:
     def __init__(self, name, path, path_finder):
         self._path = _NamespacePath(name, path, path_finder)
 
-    @staticmethod
-    def module_repr(module):
-        """Return repr for the module.
-
-        The method is deprecated.  The import machinery does the job itself.
-
-        """
-        _warnings.warn("NamespaceLoader.module_repr() is deprecated and "
-                       "slated for removal in Python 3.12", DeprecationWarning)
-        return '<module {!r} (namespace)>'.format(module.__name__)
-
     def is_package(self, fullname):
         return True
 
@@ -1441,27 +1486,6 @@ class PathFinder:
         return finder
 
     @classmethod
-    def _legacy_get_spec(cls, fullname, finder):
-        # This would be a good place for a DeprecationWarning if
-        # we ended up going that route.
-        if hasattr(finder, 'find_loader'):
-            msg = (f"{_bootstrap._object_name(finder)}.find_spec() not found; "
-                    "falling back to find_loader()")
-            _warnings.warn(msg, ImportWarning)
-            loader, portions = finder.find_loader(fullname)
-        else:
-            msg = (f"{_bootstrap._object_name(finder)}.find_spec() not found; "
-                    "falling back to find_module()")
-            _warnings.warn(msg, ImportWarning)
-            loader = finder.find_module(fullname)
-            portions = []
-        if loader is not None:
-            return _bootstrap.spec_from_loader(fullname, loader)
-        spec = _bootstrap.ModuleSpec(fullname, None)
-        spec.submodule_search_locations = portions
-        return spec
-
-    @classmethod
     def _get_spec(cls, fullname, path, target=None):
         """Find the loader or namespace_path for this module/package name."""
         # If this ends up being a namespace package, namespace_path is
@@ -1472,10 +1496,7 @@ class PathFinder:
                 continue
             finder = cls._path_importer_cache(entry)
             if finder is not None:
-                if hasattr(finder, 'find_spec'):
-                    spec = finder.find_spec(fullname, target)
-                else:
-                    spec = cls._legacy_get_spec(fullname, finder)
+                spec = finder.find_spec(fullname, target)
                 if spec is None:
                     continue
                 if spec.loader is not None:
@@ -1517,22 +1538,6 @@ class PathFinder:
         else:
             return spec
 
-    @classmethod
-    def find_module(cls, fullname, path=None):
-        """find the module on sys.path or 'path' based on sys.path_hooks and
-        sys.path_importer_cache.
-
-        This method is deprecated.  Use find_spec() instead.
-
-        """
-        _warnings.warn("PathFinder.find_module() is deprecated and "
-                       "slated for removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        spec = cls.find_spec(fullname, path)
-        if spec is None:
-            return None
-        return spec.loader
-
     @staticmethod
     def find_distributions(*args, **kwargs):
         """
@@ -1567,10 +1572,8 @@ class FileFinder:
         # Base (directory) path
         if not path or path == '.':
             self.path = _os.getcwd()
-        elif not _path_isabs(path):
-            self.path = _path_join(_os.getcwd(), path)
         else:
-            self.path = path
+            self.path = _path_abspath(path)
         self._path_mtime = -1
         self._path_cache = set()
         self._relaxed_path_cache = set()
@@ -1579,23 +1582,6 @@ class FileFinder:
         """Invalidate the directory mtime."""
         self._path_mtime = -1
 
-    find_module = _find_module_shim
-
-    def find_loader(self, fullname):
-        """Try to find a loader for the specified module, or the namespace
-        package portions. Returns (loader, list-of-portions).
-
-        This method is deprecated.  Use find_spec() instead.
-
-        """
-        _warnings.warn("FileFinder.find_loader() is deprecated and "
-                       "slated for removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        spec = self.find_spec(fullname)
-        if spec is None:
-            return None, []
-        return spec.loader, spec.submodule_search_locations or []
-
     def _get_spec(self, loader_class, fullname, path, smsl, target):
         loader = loader_class(fullname, path)
         return spec_from_file_location(fullname, path, loader=loader,
@@ -1675,7 +1661,7 @@ class FileFinder:
             for item in contents:
                 name, dot, suffix = item.partition('.')
                 if dot:
-                    new_name = '{}.{}'.format(name, suffix.lower())
+                    new_name = f'{name}.{suffix.lower()}'
                 else:
                     new_name = name
                 lower_suffix_contents.add(new_name)
@@ -1702,7 +1688,7 @@ class FileFinder:
         return path_hook_for_FileFinder
 
     def __repr__(self):
-        return 'FileFinder({!r})'.format(self.path)
+        return f'FileFinder({self.path!r})'
 
 
 # Import setup ###############################################################
@@ -1720,6 +1706,8 @@ def _fix_up_module(ns, name, pathname, cpathname=None):
             loader = SourceFileLoader(name, pathname)
     if not spec:
         spec = spec_from_file_location(name, pathname, loader=loader)
+        if cpathname:
+            spec.cached = _path_abspath(cpathname)
     try:
         ns['__spec__'] = spec
         ns['__loader__'] = loader
diff --git a/contrib/tools/python3/src/Lib/importlib/abc.py b/contrib/tools/python3/src/Lib/importlib/abc.py
index 3fa151f390..b56fa94eb9 100644
--- a/contrib/tools/python3/src/Lib/importlib/abc.py
+++ b/contrib/tools/python3/src/Lib/importlib/abc.py
@@ -15,20 +15,29 @@ from ._abc import Loader
 import abc
 import warnings
 
-# for compatibility with Python 3.10
-from .resources.abc import ResourceReader, Traversable, TraversableResources
+from .resources import abc as _resources_abc
 
 
 __all__ = [
-    'Loader', 'Finder', 'MetaPathFinder', 'PathEntryFinder',
+    'Loader', 'MetaPathFinder', 'PathEntryFinder',
     'ResourceLoader', 'InspectLoader', 'ExecutionLoader',
     'FileLoader', 'SourceLoader',
-
-    # for compatibility with Python 3.10
-    'ResourceReader', 'Traversable', 'TraversableResources',
 ]
 
 
+def __getattr__(name):
+    """
+    For backwards compatibility, continue to make names
+    from _resources_abc available through this module. #93963
+    """
+    if name in _resources_abc.__all__:
+        obj = getattr(_resources_abc, name)
+        warnings._deprecated(f"{__name__}.{name}", remove=(3, 14))
+        globals()[name] = obj
+        return obj
+    raise AttributeError(f'module {__name__!r} has no attribute {name!r}')
+
+
 def _register(abstract_cls, *classes):
     for cls in classes:
         abstract_cls.register(cls)
@@ -40,38 +49,6 @@ def _register(abstract_cls, *classes):
             abstract_cls.register(frozen_cls)
 
 
-class Finder(metaclass=abc.ABCMeta):
-
-    """Legacy abstract base class for import finders.
-
-    It may be subclassed for compatibility with legacy third party
-    reimplementations of the import system.  Otherwise, finder
-    implementations should derive from the more specific MetaPathFinder
-    or PathEntryFinder ABCs.
-
-    Deprecated since Python 3.3
-    """
-
-    def __init__(self):
-        warnings.warn("the Finder ABC is deprecated and "
-                       "slated for removal in Python 3.12; use MetaPathFinder "
-                       "or PathEntryFinder instead",
-                       DeprecationWarning)
-
-    @abc.abstractmethod
-    def find_module(self, fullname, path=None):
-        """An abstract method that should find a module.
-        The fullname is a str and the optional path is a str or None.
-        Returns a Loader object or None.
-        """
-        warnings.warn("importlib.abc.Finder along with its find_module() "
-                      "method are deprecated and "
-                       "slated for removal in Python 3.12; use "
-                       "MetaPathFinder.find_spec() or "
-                       "PathEntryFinder.find_spec() instead",
-                       DeprecationWarning)
-
-
 class MetaPathFinder(metaclass=abc.ABCMeta):
 
     """Abstract base class for import finders on sys.meta_path."""
@@ -79,27 +56,6 @@ class MetaPathFinder(metaclass=abc.ABCMeta):
     # We don't define find_spec() here since that would break
     # hasattr checks we do to support backward compatibility.
 
-    def find_module(self, fullname, path):
-        """Return a loader for the module.
-
-        If no module is found, return None.  The fullname is a str and
-        the path is a list of strings or None.
-
-        This method is deprecated since Python 3.4 in favor of
-        finder.find_spec(). If find_spec() exists then backwards-compatible
-        functionality is provided for this method.
-
-        """
-        warnings.warn("MetaPathFinder.find_module() is deprecated since Python "
-                      "3.4 in favor of MetaPathFinder.find_spec() and is "
-                      "slated for removal in Python 3.12",
-                      DeprecationWarning,
-                      stacklevel=2)
-        if not hasattr(self, 'find_spec'):
-            return None
-        found = self.find_spec(fullname, path)
-        return found.loader if found is not None else None
-
     def invalidate_caches(self):
         """An optional method for clearing the finder's cache, if any.
         This method is used by importlib.invalidate_caches().
@@ -113,43 +69,6 @@ class PathEntryFinder(metaclass=abc.ABCMeta):
 
     """Abstract base class for path entry finders used by PathFinder."""
 
-    # We don't define find_spec() here since that would break
-    # hasattr checks we do to support backward compatibility.
-
-    def find_loader(self, fullname):
-        """Return (loader, namespace portion) for the path entry.
-
-        The fullname is a str.  The namespace portion is a sequence of
-        path entries contributing to part of a namespace package. The
-        sequence may be empty.  If loader is not None, the portion will
-        be ignored.
-
-        The portion will be discarded if another path entry finder
-        locates the module as a normal module or package.
-
-        This method is deprecated since Python 3.4 in favor of
-        finder.find_spec(). If find_spec() is provided than backwards-compatible
-        functionality is provided.
-        """
-        warnings.warn("PathEntryFinder.find_loader() is deprecated since Python "
-                      "3.4 in favor of PathEntryFinder.find_spec() "
-                      "(available since 3.4)",
-                      DeprecationWarning,
-                      stacklevel=2)
-        if not hasattr(self, 'find_spec'):
-            return None, []
-        found = self.find_spec(fullname)
-        if found is not None:
-            if not found.submodule_search_locations:
-                portions = []
-            else:
-                portions = found.submodule_search_locations
-            return found.loader, portions
-        else:
-            return None, []
-
-    find_module = _bootstrap_external._find_module_shim
-
     def invalidate_caches(self):
         """An optional method for clearing the finder's cache, if any.
         This method is used by PathFinder.invalidate_caches().
diff --git a/contrib/tools/python3/src/Lib/importlib/metadata/__init__.py b/contrib/tools/python3/src/Lib/importlib/metadata/__init__.py
index bbdbceebe7..82e0ce1b28 100644
--- a/contrib/tools/python3/src/Lib/importlib/metadata/__init__.py
+++ b/contrib/tools/python3/src/Lib/importlib/metadata/__init__.py
@@ -12,7 +12,9 @@ import warnings
 import functools
 import itertools
 import posixpath
+import contextlib
 import collections
+import inspect
 
 from . import _adapters, _meta
 from ._collections import FreezableDefaultDict, Pair
@@ -24,7 +26,7 @@ from contextlib import suppress
 from importlib import import_module
 from importlib.abc import MetaPathFinder
 from itertools import starmap
-from typing import List, Mapping, Optional, Union
+from typing import List, Mapping, Optional, cast
 
 
 __all__ = [
@@ -134,6 +136,7 @@ class DeprecatedTuple:
     1
     """
 
+    # Do not remove prior to 2023-05-01 or Python 3.13
     _warn = functools.partial(
         warnings.warn,
         "EntryPoint tuple interface is deprecated. Access members by name.",
@@ -222,17 +225,6 @@ class EntryPoint(DeprecatedTuple):
         vars(self).update(dist=dist)
         return self
 
-    def __iter__(self):
-        """
-        Supply iter so one may construct dicts of EntryPoints by name.
-        """
-        msg = (
-            "Construction of dict of EntryPoints is deprecated in "
-            "favor of EntryPoints."
-        )
-        warnings.warn(msg, DeprecationWarning)
-        return iter((self.name, self))
-
     def matches(self, **params):
         """
         EntryPoint matches the given parameters.
@@ -278,77 +270,7 @@ class EntryPoint(DeprecatedTuple):
         return hash(self._key())
 
 
-class DeprecatedList(list):
-    """
-    Allow an otherwise immutable object to implement mutability
-    for compatibility.
-
-    >>> recwarn = getfixture('recwarn')
-    >>> dl = DeprecatedList(range(3))
-    >>> dl[0] = 1
-    >>> dl.append(3)
-    >>> del dl[3]
-    >>> dl.reverse()
-    >>> dl.sort()
-    >>> dl.extend([4])
-    >>> dl.pop(-1)
-    4
-    >>> dl.remove(1)
-    >>> dl += [5]
-    >>> dl + [6]
-    [1, 2, 5, 6]
-    >>> dl + (6,)
-    [1, 2, 5, 6]
-    >>> dl.insert(0, 0)
-    >>> dl
-    [0, 1, 2, 5]
-    >>> dl == [0, 1, 2, 5]
-    True
-    >>> dl == (0, 1, 2, 5)
-    True
-    >>> len(recwarn)
-    1
-    """
-
-    __slots__ = ()
-
-    _warn = functools.partial(
-        warnings.warn,
-        "EntryPoints list interface is deprecated. Cast to list if needed.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-
-    def _wrap_deprecated_method(method_name: str):  # type: ignore
-        def wrapped(self, *args, **kwargs):
-            self._warn()
-            return getattr(super(), method_name)(*args, **kwargs)
-
-        return method_name, wrapped
-
-    locals().update(
-        map(
-            _wrap_deprecated_method,
-            '__setitem__ __delitem__ append reverse extend pop remove '
-            '__iadd__ insert sort'.split(),
-        )
-    )
-
-    def __add__(self, other):
-        if not isinstance(other, tuple):
-            self._warn()
-            other = tuple(other)
-        return self.__class__(tuple(self) + other)
-
-    def __eq__(self, other):
-        if not isinstance(other, tuple):
-            self._warn()
-            other = tuple(other)
-
-        return tuple(self).__eq__(other)
-
-
-class EntryPoints(DeprecatedList):
+class EntryPoints(tuple):
     """
     An immutable collection of selectable EntryPoint objects.
     """
@@ -359,14 +281,6 @@ class EntryPoints(DeprecatedList):
         """
         Get the EntryPoint in self matching name.
         """
-        if isinstance(name, int):
-            warnings.warn(
-                "Accessing entry points by index is deprecated. "
-                "Cast to tuple if needed.",
-                DeprecationWarning,
-                stacklevel=2,
-            )
-            return super().__getitem__(name)
         try:
             return next(iter(self.select(name=name)))
         except StopIteration:
@@ -390,10 +304,6 @@ class EntryPoints(DeprecatedList):
     def groups(self):
         """
         Return the set of all groups of all entry points.
-
-        For coverage while SelectableGroups is present.
-        >>> EntryPoints().groups
-        set()
         """
         return {ep.group for ep in self}
 
@@ -409,101 +319,6 @@ class EntryPoints(DeprecatedList):
         )
 
 
-class Deprecated:
-    """
-    Compatibility add-in for mapping to indicate that
-    mapping behavior is deprecated.
-
-    >>> recwarn = getfixture('recwarn')
-    >>> class DeprecatedDict(Deprecated, dict): pass
-    >>> dd = DeprecatedDict(foo='bar')
-    >>> dd.get('baz', None)
-    >>> dd['foo']
-    'bar'
-    >>> list(dd)
-    ['foo']
-    >>> list(dd.keys())
-    ['foo']
-    >>> 'foo' in dd
-    True
-    >>> list(dd.values())
-    ['bar']
-    >>> len(recwarn)
-    1
-    """
-
-    _warn = functools.partial(
-        warnings.warn,
-        "SelectableGroups dict interface is deprecated. Use select.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-
-    def __getitem__(self, name):
-        self._warn()
-        return super().__getitem__(name)
-
-    def get(self, name, default=None):
-        self._warn()
-        return super().get(name, default)
-
-    def __iter__(self):
-        self._warn()
-        return super().__iter__()
-
-    def __contains__(self, *args):
-        self._warn()
-        return super().__contains__(*args)
-
-    def keys(self):
-        self._warn()
-        return super().keys()
-
-    def values(self):
-        self._warn()
-        return super().values()
-
-
-class SelectableGroups(Deprecated, dict):
-    """
-    A backward- and forward-compatible result from
-    entry_points that fully implements the dict interface.
-    """
-
-    @classmethod
-    def load(cls, eps):
-        by_group = operator.attrgetter('group')
-        ordered = sorted(eps, key=by_group)
-        grouped = itertools.groupby(ordered, by_group)
-        return cls((group, EntryPoints(eps)) for group, eps in grouped)
-
-    @property
-    def _all(self):
-        """
-        Reconstruct a list of all entrypoints from the groups.
-        """
-        groups = super(Deprecated, self).values()
-        return EntryPoints(itertools.chain.from_iterable(groups))
-
-    @property
-    def groups(self):
-        return self._all.groups
-
-    @property
-    def names(self):
-        """
-        for coverage:
-        >>> SelectableGroups().names
-        set()
-        """
-        return self._all.names
-
-    def select(self, **params):
-        if not params:
-            return self
-        return self._all.select(**params)
-
-
 class PackagePath(pathlib.PurePosixPath):
     """A reference to a path in a package"""
 
@@ -528,11 +343,30 @@ class FileHash:
         return f'<FileHash mode: {self.mode} value: {self.value}>'
 
 
-class Distribution:
+class DeprecatedNonAbstract:
+    def __new__(cls, *args, **kwargs):
+        all_names = {
+            name for subclass in inspect.getmro(cls) for name in vars(subclass)
+        }
+        abstract = {
+            name
+            for name in all_names
+            if getattr(getattr(cls, name), '__isabstractmethod__', False)
+        }
+        if abstract:
+            warnings.warn(
+                f"Unimplemented abstract methods {abstract}",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+        return super().__new__(cls)
+
+
+class Distribution(DeprecatedNonAbstract):
     """A Python distribution package."""
 
     @abc.abstractmethod
-    def read_text(self, filename):
+    def read_text(self, filename) -> Optional[str]:
         """Attempt to load metadata file given by the name.
 
         :param filename: The name of the file in the distribution info.
@@ -606,7 +440,7 @@ class Distribution:
         The returned object will have keys that name the various bits of
         metadata.  See PEP 566 for details.
         """
-        text = (
+        opt_text = (
             self.read_text('METADATA')
             or self.read_text('PKG-INFO')
             # This last clause is here to support old egg-info files.  Its
@@ -614,6 +448,7 @@ class Distribution:
             # (which points to the egg-info file) attribute unchanged.
             or self.read_text('')
         )
+        text = cast(str, opt_text)
         return _adapters.Message(email.message_from_string(text))
 
     @property
@@ -642,8 +477,8 @@ class Distribution:
         :return: List of PackagePath for this distribution or None
 
         Result is `None` if the metadata file that enumerates files
-        (i.e. RECORD for dist-info or SOURCES.txt for egg-info) is
-        missing.
+        (i.e. RECORD for dist-info, or installed-files.txt or
+        SOURCES.txt for egg-info) is missing.
         Result may be empty if the metadata exists but is empty.
         """
 
@@ -656,9 +491,19 @@ class Distribution:
 
         @pass_none
         def make_files(lines):
-            return list(starmap(make_file, csv.reader(lines)))
+            return starmap(make_file, csv.reader(lines))
 
-        return make_files(self._read_files_distinfo() or self._read_files_egginfo())
+        @pass_none
+        def skip_missing_files(package_paths):
+            return list(filter(lambda path: path.locate().exists(), package_paths))
+
+        return skip_missing_files(
+            make_files(
+                self._read_files_distinfo()
+                or self._read_files_egginfo_installed()
+                or self._read_files_egginfo_sources()
+            )
+        )
 
     def _read_files_distinfo(self):
         """
@@ -667,10 +512,45 @@ class Distribution:
         text = self.read_text('RECORD')
         return text and text.splitlines()
 
-    def _read_files_egginfo(self):
+    def _read_files_egginfo_installed(self):
+        """
+        Read installed-files.txt and return lines in a similar
+        CSV-parsable format as RECORD: each file must be placed
+        relative to the site-packages directory and must also be
+        quoted (since file names can contain literal commas).
+
+        This file is written when the package is installed by pip,
+        but it might not be written for other installation methods.
+        Assume the file is accurate if it exists.
         """
-        SOURCES.txt might contain literal commas, so wrap each line
-        in quotes.
+        text = self.read_text('installed-files.txt')
+        # Prepend the .egg-info/ subdir to the lines in this file.
+        # But this subdir is only available from PathDistribution's
+        # self._path.
+        subdir = getattr(self, '_path', None)
+        if not text or not subdir:
+            return
+
+        paths = (
+            (subdir / name)
+            .resolve()
+            .relative_to(self.locate_file('').resolve())
+            .as_posix()
+            for name in text.splitlines()
+        )
+        return map('"{}"'.format, paths)
+
+    def _read_files_egginfo_sources(self):
+        """
+        Read SOURCES.txt and return lines in a similar CSV-parsable
+        format as RECORD: each file name must be quoted (since it
+        might contain literal commas).
+
+        Note that SOURCES.txt is not a reliable source for what
+        files are installed by a package. This file is generated
+        for a source archive, and the files that are present
+        there (e.g. setup.py) may not correctly reflect the files
+        that are present after the package has been installed.
         """
         text = self.read_text('SOURCES.txt')
         return text and map('"{}"'.format, text.splitlines())
@@ -1017,27 +897,19 @@ Wrapper for ``distributions`` to return unique distributions by name.
 """
 
 
-def entry_points(**params) -> Union[EntryPoints, SelectableGroups]:
+def entry_points(**params) -> EntryPoints:
     """Return EntryPoint objects for all installed packages.
 
     Pass selection parameters (group or name) to filter the
     result to entry points matching those properties (see
     EntryPoints.select()).
 
-    For compatibility, returns ``SelectableGroups`` object unless
-    selection parameters are supplied. In the future, this function
-    will return ``EntryPoints`` instead of ``SelectableGroups``
-    even when no selection parameters are supplied.
-
-    For maximum future compatibility, pass selection parameters
-    or invoke ``.select`` with parameters on the result.
-
-    :return: EntryPoints or SelectableGroups for all installed packages.
+    :return: EntryPoints for all installed packages.
     """
     eps = itertools.chain.from_iterable(
         dist.entry_points for dist in _unique(distributions())
     )
-    return SelectableGroups.load(eps).select(**params)
+    return EntryPoints(eps).select(**params)
 
 
 def files(distribution_name):
@@ -1081,8 +953,13 @@ def _top_level_declared(dist):
 
 
 def _top_level_inferred(dist):
-    return {
-        f.parts[0] if len(f.parts) > 1 else f.with_suffix('').name
+    opt_names = {
+        f.parts[0] if len(f.parts) > 1 else inspect.getmodulename(f)
         for f in always_iterable(dist.files)
-        if f.suffix == ".py"
     }
+
+    @pass_none
+    def importable_name(name):
+        return '.' not in name
+
+    return filter(importable_name, opt_names)
diff --git a/contrib/tools/python3/src/Lib/importlib/metadata/_adapters.py b/contrib/tools/python3/src/Lib/importlib/metadata/_adapters.py
index aa460d3eda..6aed69a308 100644
--- a/contrib/tools/python3/src/Lib/importlib/metadata/_adapters.py
+++ b/contrib/tools/python3/src/Lib/importlib/metadata/_adapters.py
@@ -1,3 +1,5 @@
+import functools
+import warnings
 import re
 import textwrap
 import email.message
@@ -5,6 +7,15 @@ import email.message
 from ._text import FoldedCase
 
 
+# Do not remove prior to 2024-01-01 or Python 3.14
+_warn = functools.partial(
+    warnings.warn,
+    "Implicit None on return values is deprecated and will raise KeyErrors.",
+    DeprecationWarning,
+    stacklevel=2,
+)
+
+
 class Message(email.message.Message):
     multiple_use_keys = set(
         map(
@@ -39,6 +50,16 @@ class Message(email.message.Message):
     def __iter__(self):
         return super().__iter__()
 
+    def __getitem__(self, item):
+        """
+        Warn users that a ``KeyError`` can be expected when a
+        mising key is supplied. Ref python/importlib_metadata#371.
+        """
+        res = super().__getitem__(item)
+        if res is None:
+            _warn()
+        return res
+
     def _repair_headers(self):
         def redent(value):
             "Correct for RFC822 indentation"
diff --git a/contrib/tools/python3/src/Lib/importlib/metadata/_meta.py b/contrib/tools/python3/src/Lib/importlib/metadata/_meta.py
index d5c0576194..c9a7ef906a 100644
--- a/contrib/tools/python3/src/Lib/importlib/metadata/_meta.py
+++ b/contrib/tools/python3/src/Lib/importlib/metadata/_meta.py
@@ -1,4 +1,5 @@
-from typing import Any, Dict, Iterator, List, Protocol, TypeVar, Union
+from typing import Protocol
+from typing import Any, Dict, Iterator, List, Optional, TypeVar, Union, overload
 
 
 _T = TypeVar("_T")
@@ -17,7 +18,21 @@ class PackageMetadata(Protocol):
     def __iter__(self) -> Iterator[str]:
         ...  # pragma: no cover
 
-    def get_all(self, name: str, failobj: _T = ...) -> Union[List[Any], _T]:
+    @overload
+    def get(self, name: str, failobj: None = None) -> Optional[str]:
+        ...  # pragma: no cover
+
+    @overload
+    def get(self, name: str, failobj: _T) -> Union[str, _T]:
+        ...  # pragma: no cover
+
+    # overload per python/importlib_metadata#435
+    @overload
+    def get_all(self, name: str, failobj: None = None) -> Optional[List[Any]]:
+        ...  # pragma: no cover
+
+    @overload
+    def get_all(self, name: str, failobj: _T) -> Union[List[Any], _T]:
         """
         Return all values associated with a possibly multi-valued key.
         """
@@ -29,18 +44,19 @@ class PackageMetadata(Protocol):
         """
 
 
-class SimplePath(Protocol):
+class SimplePath(Protocol[_T]):
     """
     A minimal subset of pathlib.Path required by PathDistribution.
     """
 
-    def joinpath(self) -> 'SimplePath':
+    def joinpath(self) -> _T:
         ...  # pragma: no cover
 
-    def __truediv__(self) -> 'SimplePath':
+    def __truediv__(self, other: Union[str, _T]) -> _T:
         ...  # pragma: no cover
 
-    def parent(self) -> 'SimplePath':
+    @property
+    def parent(self) -> _T:
         ...  # pragma: no cover
 
     def read_text(self) -> str:
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/_adapters.py b/contrib/tools/python3/src/Lib/importlib/resources/_adapters.py
index ea363d86a5..50688fbb66 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/_adapters.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/_adapters.py
@@ -34,9 +34,7 @@ def _io_wrapper(file, mode='r', *args, **kwargs):
         return TextIOWrapper(file, *args, **kwargs)
     elif mode == 'rb':
         return file
-    raise ValueError(
-        "Invalid mode value '{}', only 'r' and 'rb' are supported".format(mode)
-    )
+    raise ValueError(f"Invalid mode value '{mode}', only 'r' and 'rb' are supported")
 
 
 class CompatibilityFiles:
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/_common.py b/contrib/tools/python3/src/Lib/importlib/resources/_common.py
index ca1fa8ab2f..a390253534 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/_common.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/_common.py
@@ -5,25 +5,58 @@ import functools
 import contextlib
 import types
 import importlib
+import inspect
+import warnings
+import itertools
 
-from typing import Union, Optional
+from typing import Union, Optional, cast
 from .abc import ResourceReader, Traversable
 
 from ._adapters import wrap_spec
 
 Package = Union[types.ModuleType, str]
+Anchor = Package
 
 
-def files(package):
-    # type: (Package) -> Traversable
+def package_to_anchor(func):
     """
-    Get a Traversable resource from a package
+    Replace 'package' parameter as 'anchor' and warn about the change.
+
+    Other errors should fall through.
+
+    >>> files('a', 'b')
+    Traceback (most recent call last):
+    TypeError: files() takes from 0 to 1 positional arguments but 2 were given
+    """
+    undefined = object()
+
+    @functools.wraps(func)
+    def wrapper(anchor=undefined, package=undefined):
+        if package is not undefined:
+            if anchor is not undefined:
+                return func(anchor, package)
+            warnings.warn(
+                "First parameter to files is renamed to 'anchor'",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            return func(package)
+        elif anchor is undefined:
+            return func()
+        return func(anchor)
+
+    return wrapper
+
+
+@package_to_anchor
+def files(anchor: Optional[Anchor] = None) -> Traversable:
+    """
+    Get a Traversable resource for an anchor.
     """
-    return from_package(get_package(package))
+    return from_package(resolve(anchor))
 
 
-def get_resource_reader(package):
-    # type: (types.ModuleType) -> Optional[ResourceReader]
+def get_resource_reader(package: types.ModuleType) -> Optional[ResourceReader]:
     """
     Return the package's loader if it's a ResourceReader.
     """
@@ -39,24 +72,39 @@ def get_resource_reader(package):
     return reader(spec.name)  # type: ignore
 
 
-def resolve(cand):
-    # type: (Package) -> types.ModuleType
-    return cand if isinstance(cand, types.ModuleType) else importlib.import_module(cand)
+@functools.singledispatch
+def resolve(cand: Optional[Anchor]) -> types.ModuleType:
+    return cast(types.ModuleType, cand)
+
+
+@resolve.register
+def _(cand: str) -> types.ModuleType:
+    return importlib.import_module(cand)
+
 
+@resolve.register
+def _(cand: None) -> types.ModuleType:
+    return resolve(_infer_caller().f_globals['__name__'])
 
-def get_package(package):
-    # type: (Package) -> types.ModuleType
-    """Take a package name or module object and return the module.
 
-    Raise an exception if the resolved module is not a package.
+def _infer_caller():
     """
-    resolved = resolve(package)
-    if wrap_spec(resolved).submodule_search_locations is None:
-        raise TypeError(f'{package!r} is not a package')
-    return resolved
+    Walk the stack and find the frame of the first caller not in this module.
+    """
+
+    def is_this_file(frame_info):
+        return frame_info.filename == __file__
+
+    def is_wrapper(frame_info):
+        return frame_info.function == 'wrapper'
+
+    not_this_file = itertools.filterfalse(is_this_file, inspect.stack())
+    # also exclude 'wrapper' due to singledispatch in the call stack
+    callers = itertools.filterfalse(is_wrapper, not_this_file)
+    return next(callers).frame
 
 
-def from_package(package):
+def from_package(package: types.ModuleType):
     """
     Return a Traversable object for the given package.
 
@@ -67,10 +115,14 @@ def from_package(package):
 
 
 @contextlib.contextmanager
-def _tempfile(reader, suffix='',
-              # gh-93353: Keep a reference to call os.remove() in late Python
-              # finalization.
-              *, _os_remove=os.remove):
+def _tempfile(
+    reader,
+    suffix='',
+    # gh-93353: Keep a reference to call os.remove() in late Python
+    # finalization.
+    *,
+    _os_remove=os.remove,
+):
     # Not using tempfile.NamedTemporaryFile as it leads to deeper 'try'
     # blocks due to the need to close the temporary file to work on Windows
     # properly.
@@ -89,13 +141,30 @@ def _tempfile(reader, suffix='',
             pass
 
 
+def _temp_file(path):
+    return _tempfile(path.read_bytes, suffix=path.name)
+
+
+def _is_present_dir(path: Traversable) -> bool:
+    """
+    Some Traversables implement ``is_dir()`` to raise an
+    exception (i.e. ``FileNotFoundError``) when the
+    directory doesn't exist. This function wraps that call
+    to always return a boolean and only return True
+    if there's a dir and it exists.
+    """
+    with contextlib.suppress(FileNotFoundError):
+        return path.is_dir()
+    return False
+
+
 @functools.singledispatch
 def as_file(path):
     """
     Given a Traversable object, return that object as a
     path on the local file system in a context manager.
     """
-    return _tempfile(path.read_bytes, suffix=path.name)
+    return _temp_dir(path) if _is_present_dir(path) else _temp_file(path)
 
 
 @as_file.register(pathlib.Path)
@@ -105,3 +174,34 @@ def _(path):
     Degenerate behavior for pathlib.Path objects.
     """
     yield path
+
+
+@contextlib.contextmanager
+def _temp_path(dir: tempfile.TemporaryDirectory):
+    """
+    Wrap tempfile.TemporyDirectory to return a pathlib object.
+    """
+    with dir as result:
+        yield pathlib.Path(result)
+
+
+@contextlib.contextmanager
+def _temp_dir(path):
+    """
+    Given a traversable dir, recursively replicate the whole tree
+    to the file system in a context manager.
+    """
+    assert path.is_dir()
+    with _temp_path(tempfile.TemporaryDirectory()) as temp_dir:
+        yield _write_contents(temp_dir, path)
+
+
+def _write_contents(target, source):
+    child = target.joinpath(source.name)
+    if source.is_dir():
+        child.mkdir()
+        for item in source.iterdir():
+            _write_contents(child, item)
+    else:
+        child.write_bytes(source.read_bytes())
+    return child
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/_itertools.py b/contrib/tools/python3/src/Lib/importlib/resources/_itertools.py
index cce05582ff..7b775ef5ae 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/_itertools.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/_itertools.py
@@ -1,35 +1,38 @@
-from itertools import filterfalse
+# from more_itertools 9.0
+def only(iterable, default=None, too_long=None):
+    """If *iterable* has only one item, return it.
+    If it has zero items, return *default*.
+    If it has more than one item, raise the exception given by *too_long*,
+    which is ``ValueError`` by default.
+    >>> only([], default='missing')
+    'missing'
+    >>> only([1])
+    1
+    >>> only([1, 2])  # doctest: +IGNORE_EXCEPTION_DETAIL
+    Traceback (most recent call last):
+    ...
+    ValueError: Expected exactly one item in iterable, but got 1, 2,
+     and perhaps more.'
+    >>> only([1, 2], too_long=TypeError)  # doctest: +IGNORE_EXCEPTION_DETAIL
+    Traceback (most recent call last):
+    ...
+    TypeError
+    Note that :func:`only` attempts to advance *iterable* twice to ensure there
+    is only one item.  See :func:`spy` or :func:`peekable` to check
+    iterable contents less destructively.
+    """
+    it = iter(iterable)
+    first_value = next(it, default)
 
-from typing import (
-    Callable,
-    Iterable,
-    Iterator,
-    Optional,
-    Set,
-    TypeVar,
-    Union,
-)
-
-# Type and type variable definitions
-_T = TypeVar('_T')
-_U = TypeVar('_U')
-
-
-def unique_everseen(
-    iterable: Iterable[_T], key: Optional[Callable[[_T], _U]] = None
-) -> Iterator[_T]:
-    "List unique elements, preserving order. Remember all elements ever seen."
-    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
-    # unique_everseen('ABBCcAD', str.lower) --> A B C D
-    seen: Set[Union[_T, _U]] = set()
-    seen_add = seen.add
-    if key is None:
-        for element in filterfalse(seen.__contains__, iterable):
-            seen_add(element)
-            yield element
+    try:
+        second_value = next(it)
+    except StopIteration:
+        pass
     else:
-        for element in iterable:
-            k = key(element)
-            if k not in seen:
-                seen_add(k)
-                yield element
+        msg = (
+            'Expected exactly one item in iterable, but got {!r}, {!r}, '
+            'and perhaps more.'.format(first_value, second_value)
+        )
+        raise too_long or ValueError(msg)
+
+    return first_value
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/_legacy.py b/contrib/tools/python3/src/Lib/importlib/resources/_legacy.py
index 1d5d3f1fbb..b1ea8105da 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/_legacy.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/_legacy.py
@@ -27,8 +27,7 @@ def deprecated(func):
     return wrapper
 
 
-def normalize_path(path):
-    # type: (Any) -> str
+def normalize_path(path: Any) -> str:
     """Normalize a path by ensuring it is a string.
 
     If the resulting string contains path separators, an exception is raised.
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/abc.py b/contrib/tools/python3/src/Lib/importlib/resources/abc.py
index 0b7bfdc415..6750a7aaf1 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/abc.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/abc.py
@@ -1,6 +1,8 @@
 import abc
 import io
+import itertools
 import os
+import pathlib
 from typing import Any, BinaryIO, Iterable, Iterator, NoReturn, Text, Optional
 from typing import runtime_checkable, Protocol
 from typing import Union
@@ -53,6 +55,10 @@ class ResourceReader(metaclass=abc.ABCMeta):
         raise FileNotFoundError
 
 
+class TraversalError(Exception):
+    pass
+
+
 @runtime_checkable
 class Traversable(Protocol):
     """
@@ -95,7 +101,6 @@ class Traversable(Protocol):
         Return True if self is a file
         """
 
-    @abc.abstractmethod
     def joinpath(self, *descendants: StrPath) -> "Traversable":
         """
         Return Traversable resolved with any descendants applied.
@@ -104,6 +109,22 @@ class Traversable(Protocol):
         and each may contain multiple levels separated by
         ``posixpath.sep`` (``/``).
         """
+        if not descendants:
+            return self
+        names = itertools.chain.from_iterable(
+            path.parts for path in map(pathlib.PurePosixPath, descendants)
+        )
+        target = next(names)
+        matches = (
+            traversable for traversable in self.iterdir() if traversable.name == target
+        )
+        try:
+            match = next(matches)
+        except StopIteration:
+            raise TraversalError(
+                "Target not found during traversal.", target, list(names)
+            )
+        return match.joinpath(*names)
 
     def __truediv__(self, child: StrPath) -> "Traversable":
         """
@@ -121,7 +142,8 @@ class Traversable(Protocol):
         accepted by io.TextIOWrapper.
         """
 
-    @abc.abstractproperty
+    @property
+    @abc.abstractmethod
     def name(self) -> str:
         """
         The base name of this object without any parent references.
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/readers.py b/contrib/tools/python3/src/Lib/importlib/resources/readers.py
index b470a2062b..c3cdf769cb 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/readers.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/readers.py
@@ -1,11 +1,12 @@
 import collections
-import operator
+import itertools
 import pathlib
+import operator
 import zipfile
 
 from . import abc
 
-from ._itertools import unique_everseen
+from ._itertools import only
 
 
 def remove_duplicates(items):
@@ -41,8 +42,10 @@ class ZipReader(abc.TraversableResources):
             raise FileNotFoundError(exc.args[0])
 
     def is_resource(self, path):
-        # workaround for `zipfile.Path.is_file` returning true
-        # for non-existent paths.
+        """
+        Workaround for `zipfile.Path.is_file` returning true
+        for non-existent paths.
+        """
         target = self.files().joinpath(path)
         return target.is_file() and target.exists()
 
@@ -67,8 +70,10 @@ class MultiplexedPath(abc.Traversable):
             raise NotADirectoryError('MultiplexedPath only supports directories')
 
     def iterdir(self):
-        files = (file for path in self._paths for file in path.iterdir())
-        return unique_everseen(files, key=operator.attrgetter('name'))
+        children = (child for path in self._paths for child in path.iterdir())
+        by_name = operator.attrgetter('name')
+        groups = itertools.groupby(sorted(children, key=by_name), key=by_name)
+        return map(self._follow, (locs for name, locs in groups))
 
     def read_bytes(self):
         raise FileNotFoundError(f'{self} is not a file')
@@ -82,15 +87,32 @@ class MultiplexedPath(abc.Traversable):
     def is_file(self):
         return False
 
-    def joinpath(self, child):
-        # first try to find child in current paths
-        for file in self.iterdir():
-            if file.name == child:
-                return file
-        # if it does not exist, construct it with the first path
-        return self._paths[0] / child
+    def joinpath(self, *descendants):
+        try:
+            return super().joinpath(*descendants)
+        except abc.TraversalError:
+            # One of the paths did not resolve (a directory does not exist).
+            # Just return something that will not exist.
+            return self._paths[0].joinpath(*descendants)
+
+    @classmethod
+    def _follow(cls, children):
+        """
+        Construct a MultiplexedPath if needed.
+
+        If children contains a sole element, return it.
+        Otherwise, return a MultiplexedPath of the items.
+        Unless one of the items is not a Directory, then return the first.
+        """
+        subdirs, one_dir, one_file = itertools.tee(children, 3)
 
-    __truediv__ = joinpath
+        try:
+            return only(one_dir)
+        except ValueError:
+            try:
+                return cls(*subdirs)
+            except NotADirectoryError:
+                return next(one_file)
 
     def open(self, *args, **kwargs):
         raise FileNotFoundError(f'{self} is not a file')
diff --git a/contrib/tools/python3/src/Lib/importlib/resources/simple.py b/contrib/tools/python3/src/Lib/importlib/resources/simple.py
index d0fbf23776..7770c922c8 100644
--- a/contrib/tools/python3/src/Lib/importlib/resources/simple.py
+++ b/contrib/tools/python3/src/Lib/importlib/resources/simple.py
@@ -16,31 +16,28 @@ class SimpleReader(abc.ABC):
     provider.
     """
 
-    @abc.abstractproperty
-    def package(self):
-        # type: () -> str
+    @property
+    @abc.abstractmethod
+    def package(self) -> str:
         """
         The name of the package for which this reader loads resources.
         """
 
     @abc.abstractmethod
-    def children(self):
-        # type: () -> List['SimpleReader']
+    def children(self) -> List['SimpleReader']:
         """
         Obtain an iterable of SimpleReader for available
         child containers (e.g. directories).
         """
 
     @abc.abstractmethod
-    def resources(self):
-        # type: () -> List[str]
+    def resources(self) -> List[str]:
         """
         Obtain available named resources for this virtual package.
         """
 
     @abc.abstractmethod
-    def open_binary(self, resource):
-        # type: (str) -> BinaryIO
+    def open_binary(self, resource: str) -> BinaryIO:
         """
         Obtain a File-like for a named resource.
         """
@@ -50,13 +47,35 @@ class SimpleReader(abc.ABC):
         return self.package.split('.')[-1]
 
 
+class ResourceContainer(Traversable):
+    """
+    Traversable container for a package's resources via its reader.
+    """
+
+    def __init__(self, reader: SimpleReader):
+        self.reader = reader
+
+    def is_dir(self):
+        return True
+
+    def is_file(self):
+        return False
+
+    def iterdir(self):
+        files = (ResourceHandle(self, name) for name in self.reader.resources)
+        dirs = map(ResourceContainer, self.reader.children())
+        return itertools.chain(files, dirs)
+
+    def open(self, *args, **kwargs):
+        raise IsADirectoryError()
+
+
 class ResourceHandle(Traversable):
     """
     Handle to a named resource in a ResourceReader.
     """
 
-    def __init__(self, parent, name):
-        # type: (ResourceContainer, str) -> None
+    def __init__(self, parent: ResourceContainer, name: str):
         self.parent = parent
         self.name = name  # type: ignore
 
@@ -76,44 +95,6 @@ class ResourceHandle(Traversable):
         raise RuntimeError("Cannot traverse into a resource")
 
 
-class ResourceContainer(Traversable):
-    """
-    Traversable container for a package's resources via its reader.
-    """
-
-    def __init__(self, reader):
-        # type: (SimpleReader) -> None
-        self.reader = reader
-
-    def is_dir(self):
-        return True
-
-    def is_file(self):
-        return False
-
-    def iterdir(self):
-        files = (ResourceHandle(self, name) for name in self.reader.resources)
-        dirs = map(ResourceContainer, self.reader.children())
-        return itertools.chain(files, dirs)
-
-    def open(self, *args, **kwargs):
-        raise IsADirectoryError()
-
-    @staticmethod
-    def _flatten(compound_names):
-        for name in compound_names:
-            yield from name.split('/')
-
-    def joinpath(self, *descendants):
-        if not descendants:
-            return self
-        names = self._flatten(descendants)
-        target = next(names)
-        return next(
-            traversable for traversable in self.iterdir() if traversable.name == target
-        ).joinpath(*names)
-
-
 class TraversableReader(TraversableResources, SimpleReader):
     """
     A TraversableResources based on SimpleReader. Resource providers
diff --git a/contrib/tools/python3/src/Lib/importlib/util.py b/contrib/tools/python3/src/Lib/importlib/util.py
index 8623c89840..f4d6e82331 100644
--- a/contrib/tools/python3/src/Lib/importlib/util.py
+++ b/contrib/tools/python3/src/Lib/importlib/util.py
@@ -11,12 +11,9 @@ from ._bootstrap_external import decode_source
 from ._bootstrap_external import source_from_cache
 from ._bootstrap_external import spec_from_file_location
 
-from contextlib import contextmanager
 import _imp
-import functools
 import sys
 import types
-import warnings
 
 
 def source_hash(source_bytes):
@@ -63,10 +60,10 @@ def _find_spec_from_path(name, path=None):
         try:
             spec = module.__spec__
         except AttributeError:
-            raise ValueError('{}.__spec__ is not set'.format(name)) from None
+            raise ValueError(f'{name}.__spec__ is not set') from None
         else:
             if spec is None:
-                raise ValueError('{}.__spec__ is None'.format(name))
+                raise ValueError(f'{name}.__spec__ is None')
             return spec
 
 
@@ -108,115 +105,64 @@ def find_spec(name, package=None):
         try:
             spec = module.__spec__
         except AttributeError:
-            raise ValueError('{}.__spec__ is not set'.format(name)) from None
+            raise ValueError(f'{name}.__spec__ is not set') from None
         else:
             if spec is None:
-                raise ValueError('{}.__spec__ is None'.format(name))
+                raise ValueError(f'{name}.__spec__ is None')
             return spec
 
 
-@contextmanager
-def _module_to_load(name):
-    is_reload = name in sys.modules
-
-    module = sys.modules.get(name)
-    if not is_reload:
-        # This must be done before open() is called as the 'io' module
-        # implicitly imports 'locale' and would otherwise trigger an
-        # infinite loop.
-        module = type(sys)(name)
-        # This must be done before putting the module in sys.modules
-        # (otherwise an optimization shortcut in import.c becomes wrong)
-        module.__initializing__ = True
-        sys.modules[name] = module
-    try:
-        yield module
-    except Exception:
-        if not is_reload:
-            try:
-                del sys.modules[name]
-            except KeyError:
-                pass
-    finally:
-        module.__initializing__ = False
+# Normally we would use contextlib.contextmanager.  However, this module
+# is imported by runpy, which means we want to avoid any unnecessary
+# dependencies.  Thus we use a class.
 
+class _incompatible_extension_module_restrictions:
+    """A context manager that can temporarily skip the compatibility check.
 
-def set_package(fxn):
-    """Set __package__ on the returned module.
+    NOTE: This function is meant to accommodate an unusual case; one
+    which is likely to eventually go away.  There's is a pretty good
+    chance this is not what you were looking for.
 
-    This function is deprecated.
+    WARNING: Using this function to disable the check can lead to
+    unexpected behavior and even crashes.  It should only be used during
+    extension module development.
 
-    """
-    @functools.wraps(fxn)
-    def set_package_wrapper(*args, **kwargs):
-        warnings.warn('The import system now takes care of this automatically; '
-                      'this decorator is slated for removal in Python 3.12',
-                      DeprecationWarning, stacklevel=2)
-        module = fxn(*args, **kwargs)
-        if getattr(module, '__package__', None) is None:
-            module.__package__ = module.__name__
-            if not hasattr(module, '__path__'):
-                module.__package__ = module.__package__.rpartition('.')[0]
-        return module
-    return set_package_wrapper
+    If "disable_check" is True then the compatibility check will not
+    happen while the context manager is active.  Otherwise the check
+    *will* happen.
 
+    Normally, extensions that do not support multiple interpreters
+    may not be imported in a subinterpreter.  That implies modules
+    that do not implement multi-phase init or that explicitly of out.
 
-def set_loader(fxn):
-    """Set __loader__ on the returned module.
+    Likewise for modules import in a subinterpeter with its own GIL
+    when the extension does not support a per-interpreter GIL.  This
+    implies the module does not have a Py_mod_multiple_interpreters slot
+    set to Py_MOD_PER_INTERPRETER_GIL_SUPPORTED.
 
-    This function is deprecated.
+    In both cases, this context manager may be used to temporarily
+    disable the check for compatible extension modules.
 
+    You can get the same effect as this function by implementing the
+    basic interface of multi-phase init (PEP 489) and lying about
+    support for mulitple interpreters (or per-interpreter GIL).
     """
-    @functools.wraps(fxn)
-    def set_loader_wrapper(self, *args, **kwargs):
-        warnings.warn('The import system now takes care of this automatically; '
-                      'this decorator is slated for removal in Python 3.12',
-                      DeprecationWarning, stacklevel=2)
-        module = fxn(self, *args, **kwargs)
-        if getattr(module, '__loader__', None) is None:
-            module.__loader__ = self
-        return module
-    return set_loader_wrapper
-
-
-def module_for_loader(fxn):
-    """Decorator to handle selecting the proper module for loaders.
-
-    The decorated function is passed the module to use instead of the module
-    name. The module passed in to the function is either from sys.modules if
-    it already exists or is a new module. If the module is new, then __name__
-    is set the first argument to the method, __loader__ is set to self, and
-    __package__ is set accordingly (if self.is_package() is defined) will be set
-    before it is passed to the decorated function (if self.is_package() does
-    not work for the module it will be set post-load).
-
-    If an exception is raised and the decorator created the module it is
-    subsequently removed from sys.modules.
-
-    The decorator assumes that the decorated function takes the module name as
-    the second argument.
 
-    """
-    warnings.warn('The import system now takes care of this automatically; '
-                  'this decorator is slated for removal in Python 3.12',
-                  DeprecationWarning, stacklevel=2)
-    @functools.wraps(fxn)
-    def module_for_loader_wrapper(self, fullname, *args, **kwargs):
-        with _module_to_load(fullname) as module:
-            module.__loader__ = self
-            try:
-                is_package = self.is_package(fullname)
-            except (ImportError, AttributeError):
-                pass
-            else:
-                if is_package:
-                    module.__package__ = fullname
-                else:
-                    module.__package__ = fullname.rpartition('.')[0]
-            # If __package__ was not set above, __import__() will do it later.
-            return fxn(self, module, *args, **kwargs)
-
-    return module_for_loader_wrapper
+    def __init__(self, *, disable_check):
+        self.disable_check = bool(disable_check)
+
+    def __enter__(self):
+        self.old = _imp._override_multi_interp_extensions_check(self.override)
+        return self
+
+    def __exit__(self, *args):
+        old = self.old
+        del self.old
+        _imp._override_multi_interp_extensions_check(old)
+
+    @property
+    def override(self):
+        return -1 if self.disable_check else 1
 
 
 class _LazyModule(types.ModuleType):
diff --git a/contrib/tools/python3/src/Lib/inspect.py b/contrib/tools/python3/src/Lib/inspect.py
index 655b04b0ee..a550202bb0 100644
--- a/contrib/tools/python3/src/Lib/inspect.py
+++ b/contrib/tools/python3/src/Lib/inspect.py
@@ -34,11 +34,16 @@ __author__ = ('Ka-Ping Yee <ping@lfw.org>',
               'Yury Selivanov <yselivanov@sprymix.com>')
 
 __all__ = [
+    "AGEN_CLOSED",
+    "AGEN_CREATED",
+    "AGEN_RUNNING",
+    "AGEN_SUSPENDED",
     "ArgInfo",
     "Arguments",
     "Attribute",
     "BlockFinder",
     "BoundArguments",
+    "BufferFlags",
     "CORO_CLOSED",
     "CORO_CREATED",
     "CORO_RUNNING",
@@ -77,6 +82,8 @@ __all__ = [
     "getabsfile",
     "getargs",
     "getargvalues",
+    "getasyncgenlocals",
+    "getasyncgenstate",
     "getattr_static",
     "getblock",
     "getcallargs",
@@ -125,6 +132,7 @@ __all__ = [
     "ismodule",
     "isroutine",
     "istraceback",
+    "markcoroutinefunction",
     "signature",
     "stack",
     "trace",
@@ -281,30 +289,15 @@ def get_annotations(obj, *, globals=None, locals=None, eval_str=False):
 
 # ----------------------------------------------------------- type-checking
 def ismodule(object):
-    """Return true if the object is a module.
-
-    Module objects provide these attributes:
-        __cached__      pathname to byte compiled file
-        __doc__         documentation string
-        __file__        filename (missing for built-in modules)"""
+    """Return true if the object is a module."""
     return isinstance(object, types.ModuleType)
 
 def isclass(object):
-    """Return true if the object is a class.
-
-    Class objects provide these attributes:
-        __doc__         documentation string
-        __module__      name of module in which this class was defined"""
+    """Return true if the object is a class."""
     return isinstance(object, type)
 
 def ismethod(object):
-    """Return true if the object is an instance method.
-
-    Instance method objects provide these attributes:
-        __doc__         documentation string
-        __name__        name with which this method was defined
-        __func__        function object containing implementation of method
-        __self__        instance to which this method is bound"""
+    """Return true if the object is an instance method."""
     return isinstance(object, types.MethodType)
 
 def ismethoddescriptor(object):
@@ -406,12 +399,31 @@ def isgeneratorfunction(obj):
     See help(isfunction) for a list of attributes."""
     return _has_code_flag(obj, CO_GENERATOR)
 
+# A marker for markcoroutinefunction and iscoroutinefunction.
+_is_coroutine_marker = object()
+
+def _has_coroutine_mark(f):
+    while ismethod(f):
+        f = f.__func__
+    f = functools._unwrap_partial(f)
+    return getattr(f, "_is_coroutine_marker", None) is _is_coroutine_marker
+
+def markcoroutinefunction(func):
+    """
+    Decorator to ensure callable is recognised as a coroutine function.
+    """
+    if hasattr(func, '__func__'):
+        func = func.__func__
+    func._is_coroutine_marker = _is_coroutine_marker
+    return func
+
 def iscoroutinefunction(obj):
     """Return true if the object is a coroutine function.
 
-    Coroutine functions are defined with "async def" syntax.
+    Coroutine functions are normally defined with "async def" syntax, but may
+    be marked via markcoroutinefunction.
     """
-    return _has_code_flag(obj, CO_COROUTINE)
+    return _has_code_flag(obj, CO_COROUTINE) or _has_coroutine_mark(obj)
 
 def isasyncgenfunction(obj):
     """Return true if the object is an asynchronous generator function.
@@ -552,7 +564,7 @@ def _getmembers(object, predicate, getter):
     processed = set()
     names = dir(object)
     if isclass(object):
-        mro = (object,) + getmro(object)
+        mro = getmro(object)
         # add any DynamicClassAttributes to the list of names if object is a class;
         # this may result in duplicate entries if, for example, a virtual
         # attribute with the same name as a DynamicClassAttribute exists
@@ -671,7 +683,7 @@ def classify_class_attrs(cls):
                 if name == '__dict__':
                     raise Exception("__dict__ is special, don't want the proxy")
                 get_obj = getattr(cls, name)
-            except Exception as exc:
+            except Exception:
                 pass
             else:
                 homecls = getattr(get_obj, "__objclass__", homecls)
@@ -946,6 +958,9 @@ def getsourcefile(object):
     elif any(filename.endswith(s) for s in
                  importlib.machinery.EXTENSION_SUFFIXES):
         return None
+    # return a filename found in the linecache even if it doesn't exist on disk
+    if filename in linecache.cache:
+        return filename
     if os.path.exists(filename):
         return filename
     # only return a non-existent filename if the module has a PEP 302 loader
@@ -954,9 +969,6 @@ def getsourcefile(object):
         return filename
     elif getattr(getattr(module, "__spec__", None), "loader", None) is not None:
         return filename
-    # or it is in the linecache
-    elif filename in linecache.cache:
-        return filename
 
 def getabsfile(object, _filename=None):
     """Return an absolute path to the source or compiled file for an object.
@@ -1230,6 +1242,14 @@ def getblock(lines):
             blockfinder.tokeneater(*_token)
     except (EndOfBlock, IndentationError):
         pass
+    except SyntaxError as e:
+        if "unmatched" not in e.msg:
+            raise e from None
+        _, *_token_info = _token
+        try:
+            blockfinder.tokeneater(tokenize.NEWLINE, *_token_info)
+        except (EndOfBlock, IndentationError):
+            pass
     return lines[:blockfinder.last]
 
 def getsourcelines(object):
@@ -1317,7 +1337,6 @@ def getargs(co):
     nkwargs = co.co_kwonlyargcount
     args = list(names[:nargs])
     kwonlyargs = list(names[nargs:nargs+nkwargs])
-    step = 0
 
     nargs += nkwargs
     varargs = None
@@ -1756,15 +1775,17 @@ def stack(context=1):
 
 def trace(context=1):
     """Return a list of records for the stack below the current exception."""
-    return getinnerframes(sys.exc_info()[2], context)
+    exc = sys.exception()
+    tb = None if exc is None else exc.__traceback__
+    return getinnerframes(tb, context)
 
 
 # ------------------------------------------------ static version of getattr
 
 _sentinel = object()
+_static_getmro = type.__dict__['__mro__'].__get__
+_get_dunder_dict_of_class = type.__dict__["__dict__"].__get__
 
-def _static_getmro(klass):
-    return type.__dict__['__mro__'].__get__(klass)
 
 def _check_instance(obj, attr):
     instance_dict = {}
@@ -1777,34 +1798,25 @@ def _check_instance(obj, attr):
 
 def _check_class(klass, attr):
     for entry in _static_getmro(klass):
-        if _shadowed_dict(type(entry)) is _sentinel:
-            try:
-                return entry.__dict__[attr]
-            except KeyError:
-                pass
+        if _shadowed_dict(type(entry)) is _sentinel and attr in entry.__dict__:
+            return entry.__dict__[attr]
     return _sentinel
 
-def _is_type(obj):
-    try:
-        _static_getmro(obj)
-    except TypeError:
-        return False
-    return True
-
-def _shadowed_dict(klass):
-    dict_attr = type.__dict__["__dict__"]
-    for entry in _static_getmro(klass):
-        try:
-            class_dict = dict_attr.__get__(entry)["__dict__"]
-        except KeyError:
-            pass
-        else:
+@functools.lru_cache()
+def _shadowed_dict_from_mro_tuple(mro):
+    for entry in mro:
+        dunder_dict = _get_dunder_dict_of_class(entry)
+        if '__dict__' in dunder_dict:
+            class_dict = dunder_dict['__dict__']
             if not (type(class_dict) is types.GetSetDescriptorType and
                     class_dict.__name__ == "__dict__" and
                     class_dict.__objclass__ is entry):
                 return class_dict
     return _sentinel
 
+def _shadowed_dict(klass):
+    return _shadowed_dict_from_mro_tuple(_static_getmro(klass))
+
 def getattr_static(obj, attr, default=_sentinel):
     """Retrieve attributes without triggering dynamic lookup via the
        descriptor protocol,  __getattr__ or __getattribute__.
@@ -1817,8 +1829,10 @@ def getattr_static(obj, attr, default=_sentinel):
        documentation for details.
     """
     instance_result = _sentinel
-    if not _is_type(obj):
-        klass = type(obj)
+
+    objtype = type(obj)
+    if type not in _static_getmro(objtype):
+        klass = objtype
         dict_attr = _shadowed_dict(klass)
         if (dict_attr is _sentinel or
             type(dict_attr) is types.MemberDescriptorType):
@@ -1843,11 +1857,11 @@ def getattr_static(obj, attr, default=_sentinel):
     if obj is klass:
         # for types we check the metaclass too
         for entry in _static_getmro(type(klass)):
-            if _shadowed_dict(type(entry)) is _sentinel:
-                try:
-                    return entry.__dict__[attr]
-                except KeyError:
-                    pass
+            if (
+                _shadowed_dict(type(entry)) is _sentinel
+                and attr in entry.__dict__
+            ):
+                return entry.__dict__[attr]
     if default is not _sentinel:
         return default
     raise AttributeError(attr)
@@ -1933,6 +1947,50 @@ def getcoroutinelocals(coroutine):
         return {}
 
 
+# ----------------------------------- asynchronous generator introspection
+
+AGEN_CREATED = 'AGEN_CREATED'
+AGEN_RUNNING = 'AGEN_RUNNING'
+AGEN_SUSPENDED = 'AGEN_SUSPENDED'
+AGEN_CLOSED = 'AGEN_CLOSED'
+
+
+def getasyncgenstate(agen):
+    """Get current state of an asynchronous generator object.
+
+    Possible states are:
+      AGEN_CREATED: Waiting to start execution.
+      AGEN_RUNNING: Currently being executed by the interpreter.
+      AGEN_SUSPENDED: Currently suspended at a yield expression.
+      AGEN_CLOSED: Execution has completed.
+    """
+    if agen.ag_running:
+        return AGEN_RUNNING
+    if agen.ag_suspended:
+        return AGEN_SUSPENDED
+    if agen.ag_frame is None:
+        return AGEN_CLOSED
+    return AGEN_CREATED
+
+
+def getasyncgenlocals(agen):
+    """
+    Get the mapping of asynchronous generator local variables to their current
+    values.
+
+    A dict is returned, with the keys the local variable names and values the
+    bound values."""
+
+    if not isasyncgen(agen):
+        raise TypeError(f"{agen!r} is not a Python async generator")
+
+    frame = getattr(agen, "ag_frame", None)
+    if frame is not None:
+        return agen.ag_frame.f_locals
+    else:
+        return {}
+
+
 ###############################################################################
 ### Function Signature Object (PEP 362)
 ###############################################################################
@@ -2104,26 +2162,21 @@ def _signature_strip_non_python_syntax(signature):
     Private helper function. Takes a signature in Argument Clinic's
     extended signature format.
 
-    Returns a tuple of three things:
-      * that signature re-rendered in standard Python syntax,
+    Returns a tuple of two things:
+      * that signature re-rendered in standard Python syntax, and
       * the index of the "self" parameter (generally 0), or None if
-        the function does not have a "self" parameter, and
-      * the index of the last "positional only" parameter,
-        or None if the signature has no positional-only parameters.
+        the function does not have a "self" parameter.
     """
 
     if not signature:
-        return signature, None, None
+        return signature, None
 
     self_parameter = None
-    last_positional_only = None
 
     lines = [l.encode('ascii') for l in signature.split('\n') if l]
     generator = iter(lines).__next__
     token_stream = tokenize.tokenize(generator)
 
-    delayed_comma = False
-    skip_next_comma = False
     text = []
     add = text.append
 
@@ -2140,35 +2193,18 @@ def _signature_strip_non_python_syntax(signature):
 
         if type == OP:
             if string == ',':
-                if skip_next_comma:
-                    skip_next_comma = False
-                else:
-                    assert not delayed_comma
-                    delayed_comma = True
-                    current_parameter += 1
-                continue
+                current_parameter += 1
 
-            if string == '/':
-                assert not skip_next_comma
-                assert last_positional_only is None
-                skip_next_comma = True
-                last_positional_only = current_parameter - 1
-                continue
-
-        if (type == ERRORTOKEN) and (string == '$'):
+        if (type == OP) and (string == '$'):
             assert self_parameter is None
             self_parameter = current_parameter
             continue
 
-        if delayed_comma:
-            delayed_comma = False
-            if not ((type == OP) and (string == ')')):
-                add(', ')
         add(string)
         if (string == ','):
             add(' ')
-    clean_signature = ''.join(text)
-    return clean_signature, self_parameter, last_positional_only
+    clean_signature = ''.join(text).strip().replace("\n", "")
+    return clean_signature, self_parameter
 
 
 def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
@@ -2177,8 +2213,7 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
     """
     Parameter = cls._parameter_cls
 
-    clean_signature, self_parameter, last_positional_only = \
-        _signature_strip_non_python_syntax(s)
+    clean_signature, self_parameter = _signature_strip_non_python_syntax(s)
 
     program = "def foo" + clean_signature + ": pass"
 
@@ -2267,17 +2302,17 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
         parameters.append(Parameter(name, kind, default=default, annotation=empty))
 
     # non-keyword-only parameters
-    args = reversed(f.args.args)
-    defaults = reversed(f.args.defaults)
-    iter = itertools.zip_longest(args, defaults, fillvalue=None)
-    if last_positional_only is not None:
-        kind = Parameter.POSITIONAL_ONLY
-    else:
-        kind = Parameter.POSITIONAL_OR_KEYWORD
-    for i, (name, default) in enumerate(reversed(list(iter))):
+    total_non_kw_args = len(f.args.posonlyargs) + len(f.args.args)
+    required_non_kw_args = total_non_kw_args - len(f.args.defaults)
+    defaults = itertools.chain(itertools.repeat(None, required_non_kw_args), f.args.defaults)
+
+    kind = Parameter.POSITIONAL_ONLY
+    for (name, default) in zip(f.args.posonlyargs, defaults):
+        p(name, default)
+
+    kind = Parameter.POSITIONAL_OR_KEYWORD
+    for (name, default) in zip(f.args.args, defaults):
         p(name, default)
-        if i == last_positional_only:
-            kind = Parameter.POSITIONAL_OR_KEYWORD
 
     # *args
     if f.args.vararg:
@@ -2476,10 +2511,18 @@ def _signature_from_callable(obj, *,
         pass
     else:
         if sig is not None:
+            # since __text_signature__ is not writable on classes, __signature__
+            # may contain text (or be a callable that returns text);
+            # if so, convert it
+            o_sig = sig
+            if not isinstance(sig, (Signature, str)) and callable(sig):
+                sig = sig()
+            if isinstance(sig, str):
+                sig = _signature_fromstr(sigcls, obj, sig)
             if not isinstance(sig, Signature):
                 raise TypeError(
                     'unexpected object {!r} in __signature__ '
-                    'attribute'.format(sig))
+                    'attribute'.format(o_sig))
             return sig
 
     try:
@@ -2796,7 +2839,7 @@ class Parameter:
         return '<{} "{}">'.format(self.__class__.__name__, self)
 
     def __hash__(self):
-        return hash((self.name, self.kind, self.annotation, self.default))
+        return hash((self._name, self._kind, self._annotation, self._default))
 
     def __eq__(self, other):
         if self is other:
@@ -3122,8 +3165,12 @@ class Signature:
                             parameters_ex = (param,)
                             break
                         else:
-                            msg = 'missing a required argument: {arg!r}'
-                            msg = msg.format(arg=param.name)
+                            if param.kind == _KEYWORD_ONLY:
+                                argtype = ' keyword-only'
+                            else:
+                                argtype = ''
+                            msg = 'missing a required{argtype} argument: {arg!r}'
+                            msg = msg.format(arg=param.name, argtype=argtype)
                             raise TypeError(msg) from None
             else:
                 # We have a positional argument to process
@@ -3281,6 +3328,28 @@ def signature(obj, *, follow_wrapped=True, globals=None, locals=None, eval_str=F
                                    globals=globals, locals=locals, eval_str=eval_str)
 
 
+class BufferFlags(enum.IntFlag):
+    SIMPLE = 0x0
+    WRITABLE = 0x1
+    FORMAT = 0x4
+    ND = 0x8
+    STRIDES = 0x10 | ND
+    C_CONTIGUOUS = 0x20 | STRIDES
+    F_CONTIGUOUS = 0x40 | STRIDES
+    ANY_CONTIGUOUS = 0x80 | STRIDES
+    INDIRECT = 0x100 | STRIDES
+    CONTIG = ND | WRITABLE
+    CONTIG_RO = ND
+    STRIDED = STRIDES | WRITABLE
+    STRIDED_RO = STRIDES
+    RECORDS = STRIDES | WRITABLE | FORMAT
+    RECORDS_RO = STRIDES | FORMAT
+    FULL = INDIRECT | WRITABLE | FORMAT
+    FULL_RO = INDIRECT | FORMAT
+    READ = 0x100
+    WRITE = 0x200
+
+
 def _main():
     """ Logic for inspecting an object given at command line """
     import argparse
diff --git a/contrib/tools/python3/src/Lib/io.py b/contrib/tools/python3/src/Lib/io.py
index a58ab01ede..f0e2fa15d5 100644
--- a/contrib/tools/python3/src/Lib/io.py
+++ b/contrib/tools/python3/src/Lib/io.py
@@ -58,22 +58,6 @@ from _io import (DEFAULT_BUFFER_SIZE, BlockingIOError, UnsupportedOperation,
                  IncrementalNewlineDecoder, text_encoding, TextIOWrapper)
 
 
-def __getattr__(name):
-    if name == "OpenWrapper":
-        # bpo-43680: Until Python 3.9, _pyio.open was not a static method and
-        # builtins.open was set to OpenWrapper to not become a bound method
-        # when set to a class variable. _io.open is a built-in function whereas
-        # _pyio.open is a Python function. In Python 3.10, _pyio.open() is now
-        # a static method, and builtins.open() is now io.open().
-        import warnings
-        warnings.warn('OpenWrapper is deprecated, use open instead',
-                      DeprecationWarning, stacklevel=2)
-        global OpenWrapper
-        OpenWrapper = open
-        return OpenWrapper
-    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
-
-
 # Pretend this exception was created here.
 UnsupportedOperation.__module__ = "io"
 
diff --git a/contrib/tools/python3/src/Lib/ipaddress.py b/contrib/tools/python3/src/Lib/ipaddress.py
index 16ba16cd7d..9ca90fd0f7 100644
--- a/contrib/tools/python3/src/Lib/ipaddress.py
+++ b/contrib/tools/python3/src/Lib/ipaddress.py
@@ -1821,9 +1821,6 @@ class _BaseV6:
     def _explode_shorthand_ip_string(self):
         """Expand a shortened IPv6 address.
 
-        Args:
-            ip_str: A string, the IPv6 address.
-
         Returns:
             A string, the expanded IPv6 address.
 
diff --git a/contrib/tools/python3/src/Lib/keyword.py b/contrib/tools/python3/src/Lib/keyword.py
index cc2b46b722..e22c837835 100644
--- a/contrib/tools/python3/src/Lib/keyword.py
+++ b/contrib/tools/python3/src/Lib/keyword.py
@@ -56,7 +56,8 @@ kwlist = [
 softkwlist = [
     '_',
     'case',
-    'match'
+    'match',
+    'type'
 ]
 
 iskeyword = frozenset(kwlist).__contains__
diff --git a/contrib/tools/python3/src/Lib/locale.py b/contrib/tools/python3/src/Lib/locale.py
index f45841ed62..4965c97307 100644
--- a/contrib/tools/python3/src/Lib/locale.py
+++ b/contrib/tools/python3/src/Lib/locale.py
@@ -26,7 +26,7 @@ import functools
 # trying the import.  So __all__ is also fiddled at the end of the file.
 __all__ = ["getlocale", "getdefaultlocale", "getpreferredencoding", "Error",
            "setlocale", "resetlocale", "localeconv", "strcoll", "strxfrm",
-           "str", "atof", "atoi", "format", "format_string", "currency",
+           "str", "atof", "atoi", "format_string", "currency",
            "normalize", "LC_CTYPE", "LC_COLLATE", "LC_TIME", "LC_MONETARY",
            "LC_NUMERIC", "LC_ALL", "CHAR_MAX", "getencoding"]
 
@@ -247,21 +247,6 @@ def format_string(f, val, grouping=False, monetary=False):
 
     return new_f % val
 
-def format(percent, value, grouping=False, monetary=False, *additional):
-    """Deprecated, use format_string instead."""
-    import warnings
-    warnings.warn(
-        "This method will be removed in a future version of Python. "
-        "Use 'locale.format_string()' instead.",
-        DeprecationWarning, stacklevel=2
-    )
-
-    match = _percent_re.match(percent)
-    if not match or len(match.group())!= len(percent):
-        raise ValueError(("format() must be given exactly one %%char "
-                         "format specifier, %s not valid") % repr(percent))
-    return _format(percent, value, grouping, monetary, *additional)
-
 def currency(val, symbol=True, grouping=False, international=False):
     """Formats val according to the currency settings
     in the current locale."""
@@ -561,7 +546,10 @@ def getdefaultlocale(envvars=('LC_ALL', 'LC_CTYPE', 'LANG', 'LANGUAGE')):
         "{name!r} is deprecated and slated for removal in Python {remove}. "
         "Use setlocale(), getencoding() and getlocale() instead.",
         remove=(3, 15))
+    return _getdefaultlocale(envvars)
+
 
+def _getdefaultlocale(envvars=('LC_ALL', 'LC_CTYPE', 'LANG', 'LANGUAGE')):
     try:
         # check if it's supported by the _locale module
         import _locale
@@ -655,7 +643,7 @@ except ImportError:
             # On Android langinfo.h and CODESET are missing, and UTF-8 is
             # always used in mbstowcs() and wcstombs().
             return 'utf-8'
-        encoding = getdefaultlocale()[1]
+        encoding = _getdefaultlocale()[1]
         if encoding is None:
             # LANG not set, default to UTF-8
             encoding = 'utf-8'
@@ -976,7 +964,7 @@ locale_alias = {
     'c.ascii':                              'C',
     'c.en':                                 'C',
     'c.iso88591':                           'en_US.ISO8859-1',
-    'c.utf8':                               'en_US.UTF-8',
+    'c.utf8':                               'C.UTF-8',
     'c_c':                                  'C',
     'c_c.c':                                'C',
     'ca':                                   'ca_ES.ISO8859-1',
diff --git a/contrib/tools/python3/src/Lib/logging/__init__.py b/contrib/tools/python3/src/Lib/logging/__init__.py
index bcee2bab0b..056380fb22 100644
--- a/contrib/tools/python3/src/Lib/logging/__init__.py
+++ b/contrib/tools/python3/src/Lib/logging/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2001-2019 by Vinay Sajip. All Rights Reserved.
+# Copyright 2001-2022 by Vinay Sajip. All Rights Reserved.
 #
 # Permission to use, copy, modify, and distribute this software and its
 # documentation for any purpose and without fee is hereby granted,
@@ -18,7 +18,7 @@
 Logging package for Python. Based on PEP 282 and comments thereto in
 comp.lang.python.
 
-Copyright (C) 2001-2019 Vinay Sajip. All Rights Reserved.
+Copyright (C) 2001-2022 Vinay Sajip. All Rights Reserved.
 
 To use, simply 'import logging' and log away!
 """
@@ -38,7 +38,8 @@ __all__ = ['BASIC_FORMAT', 'BufferingFormatter', 'CRITICAL', 'DEBUG', 'ERROR',
            'exception', 'fatal', 'getLevelName', 'getLogger', 'getLoggerClass',
            'info', 'log', 'makeLogRecord', 'setLoggerClass', 'shutdown',
            'warn', 'warning', 'getLogRecordFactory', 'setLogRecordFactory',
-           'lastResort', 'raiseExceptions', 'getLevelNamesMapping']
+           'lastResort', 'raiseExceptions', 'getLevelNamesMapping',
+           'getHandlerByName', 'getHandlerNames']
 
 import threading
 
@@ -64,20 +65,25 @@ _startTime = time.time()
 raiseExceptions = True
 
 #
-# If you don't want threading information in the log, set this to zero
+# If you don't want threading information in the log, set this to False
 #
 logThreads = True
 
 #
-# If you don't want multiprocessing information in the log, set this to zero
+# If you don't want multiprocessing information in the log, set this to False
 #
 logMultiprocessing = True
 
 #
-# If you don't want process information in the log, set this to zero
+# If you don't want process information in the log, set this to False
 #
 logProcesses = True
 
+#
+# If you don't want asyncio task information in the log, set this to False
+#
+logAsyncioTasks = True
+
 #---------------------------------------------------------------------------
 #   Level related stuff
 #---------------------------------------------------------------------------
@@ -167,8 +173,8 @@ else: #pragma: no cover
         """Return the frame object for the caller's stack frame."""
         try:
             raise Exception
-        except Exception:
-            return sys.exc_info()[2].tb_frame.f_back
+        except Exception as exc:
+            return exc.__traceback__.tb_frame.f_back
 
 #
 # _srcfile is used when walking the stack to check when we've got the first
@@ -361,6 +367,15 @@ class LogRecord(object):
         else:
             self.process = None
 
+        self.taskName = None
+        if logAsyncioTasks:
+            asyncio = sys.modules.get('asyncio')
+            if asyncio:
+                try:
+                    self.taskName = asyncio.current_task().get_name()
+                except Exception:
+                    pass
+
     def __repr__(self):
         return '<LogRecord: %s, %s, %s, %s, "%s">'%(self.name, self.levelno,
             self.pathname, self.lineno, self.msg)
@@ -566,6 +581,7 @@ class Formatter(object):
                         (typically at application startup time)
     %(thread)d          Thread ID (if available)
     %(threadName)s      Thread name (if available)
+    %(taskName)s        Task name (if available)
     %(process)d         Process ID (if available)
     %(message)s         The result of record.getMessage(), computed just as
                         the record is emitted
@@ -817,23 +833,36 @@ class Filterer(object):
         Determine if a record is loggable by consulting all the filters.
 
         The default is to allow the record to be logged; any filter can veto
-        this and the record is then dropped. Returns a zero value if a record
-        is to be dropped, else non-zero.
+        this by returning a false value.
+        If a filter attached to a handler returns a log record instance,
+        then that instance is used in place of the original log record in
+        any further processing of the event by that handler.
+        If a filter returns any other true value, the original log record
+        is used in any further processing of the event by that handler.
+
+        If none of the filters return false values, this method returns
+        a log record.
+        If any of the filters return a false value, this method returns
+        a false value.
 
         .. versionchanged:: 3.2
 
            Allow filters to be just callables.
+
+        .. versionchanged:: 3.12
+           Allow filters to return a LogRecord instead of
+           modifying it in place.
         """
-        rv = True
         for f in self.filters:
             if hasattr(f, 'filter'):
                 result = f.filter(record)
             else:
                 result = f(record) # assume callable - will raise if not
             if not result:
-                rv = False
-                break
-        return rv
+                return False
+            if isinstance(result, LogRecord):
+                record = result
+        return record
 
 #---------------------------------------------------------------------------
 #   Handler classes and functions
@@ -870,6 +899,23 @@ def _addHandlerRef(handler):
     finally:
         _releaseLock()
 
+
+def getHandlerByName(name):
+    """
+    Get a handler with the specified *name*, or None if there isn't one with
+    that name.
+    """
+    return _handlers.get(name)
+
+
+def getHandlerNames():
+    """
+    Return all known handler names as an immutable set.
+    """
+    result = set(_handlers.keys())
+    return frozenset(result)
+
+
 class Handler(Filterer):
     """
     Handler instances dispatch logging events to specific destinations.
@@ -968,10 +1014,14 @@ class Handler(Filterer):
 
         Emission depends on filters which may have been added to the handler.
         Wrap the actual emission of the record with acquisition/release of
-        the I/O thread lock. Returns whether the filter passed the record for
-        emission.
+        the I/O thread lock.
+
+        Returns an instance of the log record that was emitted
+        if it passed all filters, otherwise a false value is returned.
         """
         rv = self.filter(record)
+        if isinstance(rv, LogRecord):
+            record = rv
         if rv:
             self.acquire()
             try:
@@ -1483,7 +1533,7 @@ class Logger(Filterer):
         To pass exception information, use the keyword argument exc_info with
         a true value, e.g.
 
-        logger.info("Houston, we have a %s", "interesting problem", exc_info=1)
+        logger.info("Houston, we have a %s", "notable problem", exc_info=1)
         """
         if self.isEnabledFor(INFO):
             self._log(INFO, msg, args, **kwargs)
@@ -1640,8 +1690,14 @@ class Logger(Filterer):
         This method is used for unpickled records received from a socket, as
         well as those created locally. Logger-level filtering is applied.
         """
-        if (not self.disabled) and self.filter(record):
-            self.callHandlers(record)
+        if self.disabled:
+            return
+        maybe_record = self.filter(record)
+        if not maybe_record:
+            return
+        if isinstance(maybe_record, LogRecord):
+            record = maybe_record
+        self.callHandlers(record)
 
     def addHandler(self, hdlr):
         """
@@ -1772,6 +1828,25 @@ class Logger(Filterer):
             suffix = '.'.join((self.name, suffix))
         return self.manager.getLogger(suffix)
 
+    def getChildren(self):
+
+        def _hierlevel(logger):
+            if logger is logger.manager.root:
+                return 0
+            return 1 + logger.name.count('.')
+
+        d = self.manager.loggerDict
+        _acquireLock()
+        try:
+            # exclude PlaceHolders - the last check is to ensure that lower-level
+            # descendants aren't returned - if there are placeholders, a logger's
+            # parent field might point to a grandparent or ancestor thereof.
+            return set(item for item in d.values()
+                       if isinstance(item, Logger) and item.parent is self and
+                       _hierlevel(item) == 1 + _hierlevel(item.parent))
+        finally:
+            _releaseLock()
+
     def __repr__(self):
         level = getLevelName(self.getEffectiveLevel())
         return '<%s %s (%s)>' % (self.__class__.__name__, self.name, level)
@@ -2189,7 +2264,11 @@ def shutdown(handlerList=_handlerList):
             if h:
                 try:
                     h.acquire()
-                    h.flush()
+                    # MemoryHandlers might not want to be flushed on close,
+                    # but circular imports prevent us scoping this to just
+                    # those handlers.  hence the default to True.
+                    if getattr(h, 'flushOnClose', True):
+                        h.flush()
                     h.close()
                 except (OSError, ValueError):
                     # Ignore errors which might be caused
diff --git a/contrib/tools/python3/src/Lib/logging/config.py b/contrib/tools/python3/src/Lib/logging/config.py
index 735ffbe194..33417b75d5 100644
--- a/contrib/tools/python3/src/Lib/logging/config.py
+++ b/contrib/tools/python3/src/Lib/logging/config.py
@@ -19,12 +19,13 @@ Configuration functions for the logging package for Python. The core package
 is based on PEP 282 and comments thereto in comp.lang.python, and influenced
 by Apache's log4j system.
 
-Copyright (C) 2001-2023 Vinay Sajip. All Rights Reserved.
+Copyright (C) 2001-2022 Vinay Sajip. All Rights Reserved.
 
 To use, simply 'import logging' and log away!
 """
 
 import errno
+import functools
 import io
 import logging
 import logging.handlers
@@ -123,11 +124,18 @@ def _create_formatters(cp):
         fs = cp.get(sectname, "format", raw=True, fallback=None)
         dfs = cp.get(sectname, "datefmt", raw=True, fallback=None)
         stl = cp.get(sectname, "style", raw=True, fallback='%')
+        defaults = cp.get(sectname, "defaults", raw=True, fallback=None)
+
         c = logging.Formatter
         class_name = cp[sectname].get("class")
         if class_name:
             c = _resolve(class_name)
-        f = c(fs, dfs, stl)
+
+        if defaults is not None:
+            defaults = eval(defaults, vars(logging))
+            f = c(fs, dfs, stl, defaults=defaults)
+        else:
+            f = c(fs, dfs, stl)
         formatters[form] = f
     return formatters
 
@@ -574,7 +582,7 @@ class DictConfigurator(BaseConfigurator):
                         handler.name = name
                         handlers[name] = handler
                     except Exception as e:
-                        if 'target not configured yet' in str(e.__cause__):
+                        if ' not configured yet' in str(e.__cause__):
                             deferred.append(name)
                         else:
                             raise ValueError('Unable to configure handler '
@@ -677,18 +685,27 @@ class DictConfigurator(BaseConfigurator):
             dfmt = config.get('datefmt', None)
             style = config.get('style', '%')
             cname = config.get('class', None)
+            defaults = config.get('defaults', None)
 
             if not cname:
                 c = logging.Formatter
             else:
                 c = _resolve(cname)
 
+            kwargs  = {}
+
+            # Add defaults only if it exists.
+            # Prevents TypeError in custom formatter callables that do not
+            # accept it.
+            if defaults is not None:
+                kwargs['defaults'] = defaults
+
             # A TypeError would be raised if "validate" key is passed in with a formatter callable
             # that does not accept "validate" as a parameter
             if 'validate' in config:  # if user hasn't mentioned it, the default will be fine
-                result = c(fmt, dfmt, style, config['validate'])
+                result = c(fmt, dfmt, style, config['validate'], **kwargs)
             else:
-                result = c(fmt, dfmt, style)
+                result = c(fmt, dfmt, style, **kwargs)
 
         return result
 
@@ -713,6 +730,21 @@ class DictConfigurator(BaseConfigurator):
             except Exception as e:
                 raise ValueError('Unable to add filter %r' % f) from e
 
+    def _configure_queue_handler(self, klass, **kwargs):
+        if 'queue' in kwargs:
+            q = kwargs['queue']
+        else:
+            q = queue.Queue()  # unbounded
+        rhl = kwargs.get('respect_handler_level', False)
+        if 'listener' in kwargs:
+            lklass = kwargs['listener']
+        else:
+            lklass = logging.handlers.QueueListener
+        listener = lklass(q, *kwargs.get('handlers', []), respect_handler_level=rhl)
+        handler = klass(q)
+        handler.listener = listener
+        return handler
+
     def configure_handler(self, config):
         """Configure a handler from a dictionary."""
         config_copy = dict(config)  # for restoring in case of error
@@ -732,26 +764,85 @@ class DictConfigurator(BaseConfigurator):
             factory = c
         else:
             cname = config.pop('class')
-            klass = self.resolve(cname)
-            #Special case for handler which refers to another handler
+            if callable(cname):
+                klass = cname
+            else:
+                klass = self.resolve(cname)
             if issubclass(klass, logging.handlers.MemoryHandler) and\
                 'target' in config:
+                # Special case for handler which refers to another handler
                 try:
-                    th = self.config['handlers'][config['target']]
+                    tn = config['target']
+                    th = self.config['handlers'][tn]
                     if not isinstance(th, logging.Handler):
                         config.update(config_copy)  # restore for deferred cfg
                         raise TypeError('target not configured yet')
                     config['target'] = th
                 except Exception as e:
-                    raise ValueError('Unable to set target handler '
-                                     '%r' % config['target']) from e
+                    raise ValueError('Unable to set target handler %r' % tn) from e
+            elif issubclass(klass, logging.handlers.QueueHandler):
+                # Another special case for handler which refers to other handlers
+                # if 'handlers' not in config:
+                    # raise ValueError('No handlers specified for a QueueHandler')
+                if 'queue' in config:
+                    from multiprocessing.queues import Queue as MPQueue
+                    qspec = config['queue']
+                    if not isinstance(qspec, (queue.Queue, MPQueue)):
+                        if isinstance(qspec, str):
+                            q = self.resolve(qspec)
+                            if not callable(q):
+                                raise TypeError('Invalid queue specifier %r' % qspec)
+                            q = q()
+                        elif isinstance(qspec, dict):
+                            if '()' not in qspec:
+                                raise TypeError('Invalid queue specifier %r' % qspec)
+                            q = self.configure_custom(dict(qspec))
+                        else:
+                            raise TypeError('Invalid queue specifier %r' % qspec)
+                        config['queue'] = q
+                if 'listener' in config:
+                    lspec = config['listener']
+                    if isinstance(lspec, type):
+                        if not issubclass(lspec, logging.handlers.QueueListener):
+                            raise TypeError('Invalid listener specifier %r' % lspec)
+                    else:
+                        if isinstance(lspec, str):
+                            listener = self.resolve(lspec)
+                            if isinstance(listener, type) and\
+                                not issubclass(listener, logging.handlers.QueueListener):
+                                raise TypeError('Invalid listener specifier %r' % lspec)
+                        elif isinstance(lspec, dict):
+                            if '()' not in lspec:
+                                raise TypeError('Invalid listener specifier %r' % lspec)
+                            listener = self.configure_custom(dict(lspec))
+                        else:
+                            raise TypeError('Invalid listener specifier %r' % lspec)
+                        if not callable(listener):
+                            raise TypeError('Invalid listener specifier %r' % lspec)
+                        config['listener'] = listener
+                if 'handlers' in config:
+                    hlist = []
+                    try:
+                        for hn in config['handlers']:
+                            h = self.config['handlers'][hn]
+                            if not isinstance(h, logging.Handler):
+                                config.update(config_copy)  # restore for deferred cfg
+                                raise TypeError('Required handler %r '
+                                                'is not configured yet' % hn)
+                            hlist.append(h)
+                    except Exception as e:
+                        raise ValueError('Unable to set required handler %r' % hn) from e
+                    config['handlers'] = hlist
             elif issubclass(klass, logging.handlers.SMTPHandler) and\
                 'mailhost' in config:
                 config['mailhost'] = self.as_tuple(config['mailhost'])
             elif issubclass(klass, logging.handlers.SysLogHandler) and\
                 'address' in config:
                 config['address'] = self.as_tuple(config['address'])
-            factory = klass
+            if issubclass(klass, logging.handlers.QueueHandler):
+                factory = functools.partial(self._configure_queue_handler, klass)
+            else:
+                factory = klass
         kwargs = {k: config[k] for k in config if (k != '.' and valid_ident(k))}
         try:
             result = factory(**kwargs)
diff --git a/contrib/tools/python3/src/Lib/logging/handlers.py b/contrib/tools/python3/src/Lib/logging/handlers.py
index 81041488c8..6e88184b51 100644
--- a/contrib/tools/python3/src/Lib/logging/handlers.py
+++ b/contrib/tools/python3/src/Lib/logging/handlers.py
@@ -1442,6 +1442,7 @@ class QueueHandler(logging.Handler):
         """
         logging.Handler.__init__(self)
         self.queue = queue
+        self.listener = None  # will be set to listener if configured via dictConfig()
 
     def enqueue(self, record):
         """
diff --git a/contrib/tools/python3/src/Lib/mailbox.py b/contrib/tools/python3/src/Lib/mailbox.py
index 334c7d5a95..c8b3444f64 100644
--- a/contrib/tools/python3/src/Lib/mailbox.py
+++ b/contrib/tools/python3/src/Lib/mailbox.py
@@ -1957,10 +1957,7 @@ class _ProxyFile:
 
     def __iter__(self):
         """Iterate over lines."""
-        while True:
-            line = self.readline()
-            if not line:
-                return
+        while line := self.readline():
             yield line
 
     def tell(self):
diff --git a/contrib/tools/python3/src/Lib/mailcap.py b/contrib/tools/python3/src/Lib/mailcap.py
index 7278ea7051..2f4656e854 100644
--- a/contrib/tools/python3/src/Lib/mailcap.py
+++ b/contrib/tools/python3/src/Lib/mailcap.py
@@ -90,9 +90,7 @@ def _readmailcapfile(fp, lineno):
     the viewing command is stored with the key "view".
     """
     caps = {}
-    while 1:
-        line = fp.readline()
-        if not line: break
+    while line := fp.readline():
         # Ignore comments and blank lines
         if line[0] == '#' or line.strip() == '':
             continue
diff --git a/contrib/tools/python3/src/Lib/mimetypes.py b/contrib/tools/python3/src/Lib/mimetypes.py
index f6c43b3b92..37228de482 100644
--- a/contrib/tools/python3/src/Lib/mimetypes.py
+++ b/contrib/tools/python3/src/Lib/mimetypes.py
@@ -217,10 +217,7 @@ class MimeTypes:
         list of standard types, else to the list of non-standard
         types.
         """
-        while 1:
-            line = fp.readline()
-            if not line:
-                break
+        while line := fp.readline():
             words = line.split()
             for i in range(len(words)):
                 if words[i][0] == '#':
@@ -427,8 +424,8 @@ def _default_mime_types():
     # Make sure the entry with the preferred file extension for a particular mime type
     # appears before any others of the same mimetype.
     types_map = _types_map_default = {
-        '.js'     : 'application/javascript',
-        '.mjs'    : 'application/javascript',
+        '.js'     : 'text/javascript',
+        '.mjs'    : 'text/javascript',
         '.json'   : 'application/json',
         '.webmanifest': 'application/manifest+json',
         '.doc'    : 'application/msword',
diff --git a/contrib/tools/python3/src/Lib/multiprocessing/connection.py b/contrib/tools/python3/src/Lib/multiprocessing/connection.py
index 8b81f9954e..dbbf106f68 100644
--- a/contrib/tools/python3/src/Lib/multiprocessing/connection.py
+++ b/contrib/tools/python3/src/Lib/multiprocessing/connection.py
@@ -739,39 +739,227 @@ if sys.platform == 'win32':
 # Authentication stuff
 #
 
-MESSAGE_LENGTH = 20
+MESSAGE_LENGTH = 40  # MUST be > 20
 
-CHALLENGE = b'#CHALLENGE#'
-WELCOME = b'#WELCOME#'
-FAILURE = b'#FAILURE#'
+_CHALLENGE = b'#CHALLENGE#'
+_WELCOME = b'#WELCOME#'
+_FAILURE = b'#FAILURE#'
 
-def deliver_challenge(connection, authkey):
+# multiprocessing.connection Authentication Handshake Protocol Description
+# (as documented for reference after reading the existing code)
+# =============================================================================
+#
+# On Windows: native pipes with "overlapped IO" are used to send the bytes,
+# instead of the length prefix SIZE scheme described below. (ie: the OS deals
+# with message sizes for us)
+#
+# Protocol error behaviors:
+#
+# On POSIX, any failure to receive the length prefix into SIZE, for SIZE greater
+# than the requested maxsize to receive, or receiving fewer than SIZE bytes
+# results in the connection being closed and auth to fail.
+#
+# On Windows, receiving too few bytes is never a low level _recv_bytes read
+# error, receiving too many will trigger an error only if receive maxsize
+# value was larger than 128 OR the if the data arrived in smaller pieces.
+#
+#      Serving side                           Client side
+#     ------------------------------  ---------------------------------------
+# 0.                                  Open a connection on the pipe.
+# 1.  Accept connection.
+# 2.  Random 20+ bytes -> MESSAGE
+#     Modern servers always send
+#     more than 20 bytes and include
+#     a {digest} prefix on it with
+#     their preferred HMAC digest.
+#     Legacy ones send ==20 bytes.
+# 3.  send 4 byte length (net order)
+#     prefix followed by:
+#       b'#CHALLENGE#' + MESSAGE
+# 4.                                  Receive 4 bytes, parse as network byte
+#                                     order integer. If it is -1, receive an
+#                                     additional 8 bytes, parse that as network
+#                                     byte order. The result is the length of
+#                                     the data that follows -> SIZE.
+# 5.                                  Receive min(SIZE, 256) bytes -> M1
+# 6.                                  Assert that M1 starts with:
+#                                       b'#CHALLENGE#'
+# 7.                                  Strip that prefix from M1 into -> M2
+# 7.1.                                Parse M2: if it is exactly 20 bytes in
+#                                     length this indicates a legacy server
+#                                     supporting only HMAC-MD5. Otherwise the
+# 7.2.                                preferred digest is looked up from an
+#                                     expected "{digest}" prefix on M2. No prefix
+#                                     or unsupported digest? <- AuthenticationError
+# 7.3.                                Put divined algorithm name in -> D_NAME
+# 8.                                  Compute HMAC-D_NAME of AUTHKEY, M2 -> C_DIGEST
+# 9.                                  Send 4 byte length prefix (net order)
+#                                     followed by C_DIGEST bytes.
+# 10. Receive 4 or 4+8 byte length
+#     prefix (#4 dance) -> SIZE.
+# 11. Receive min(SIZE, 256) -> C_D.
+# 11.1. Parse C_D: legacy servers
+#     accept it as is, "md5" -> D_NAME
+# 11.2. modern servers check the length
+#     of C_D, IF it is 16 bytes?
+# 11.2.1. "md5" -> D_NAME
+#         and skip to step 12.
+# 11.3. longer? expect and parse a "{digest}"
+#     prefix into -> D_NAME.
+#     Strip the prefix and store remaining
+#     bytes in -> C_D.
+# 11.4. Don't like D_NAME? <- AuthenticationError
+# 12. Compute HMAC-D_NAME of AUTHKEY,
+#     MESSAGE into -> M_DIGEST.
+# 13. Compare M_DIGEST == C_D:
+# 14a: Match? Send length prefix &
+#       b'#WELCOME#'
+#    <- RETURN
+# 14b: Mismatch? Send len prefix &
+#       b'#FAILURE#'
+#    <- CLOSE & AuthenticationError
+# 15.                                 Receive 4 or 4+8 byte length prefix (net
+#                                     order) again as in #4 into -> SIZE.
+# 16.                                 Receive min(SIZE, 256) bytes -> M3.
+# 17.                                 Compare M3 == b'#WELCOME#':
+# 17a.                                Match? <- RETURN
+# 17b.                                Mismatch? <- CLOSE & AuthenticationError
+#
+# If this RETURNed, the connection remains open: it has been authenticated.
+#
+# Length prefixes are used consistently. Even on the legacy protocol, this
+# was good fortune and allowed us to evolve the protocol by using the length
+# of the opening challenge or length of the returned digest as a signal as
+# to which protocol the other end supports.
+
+_ALLOWED_DIGESTS = frozenset(
+        {b'md5', b'sha256', b'sha384', b'sha3_256', b'sha3_384'})
+_MAX_DIGEST_LEN = max(len(_) for _ in _ALLOWED_DIGESTS)
+
+# Old hmac-md5 only server versions from Python <=3.11 sent a message of this
+# length. It happens to not match the length of any supported digest so we can
+# use a message of this length to indicate that we should work in backwards
+# compatible md5-only mode without a {digest_name} prefix on our response.
+_MD5ONLY_MESSAGE_LENGTH = 20
+_MD5_DIGEST_LEN = 16
+_LEGACY_LENGTHS = (_MD5ONLY_MESSAGE_LENGTH, _MD5_DIGEST_LEN)
+
+
+def _get_digest_name_and_payload(message: bytes) -> (str, bytes):
+    """Returns a digest name and the payload for a response hash.
+
+    If a legacy protocol is detected based on the message length
+    or contents the digest name returned will be empty to indicate
+    legacy mode where MD5 and no digest prefix should be sent.
+    """
+    # modern message format: b"{digest}payload" longer than 20 bytes
+    # legacy message format: 16 or 20 byte b"payload"
+    if len(message) in _LEGACY_LENGTHS:
+        # Either this was a legacy server challenge, or we're processing
+        # a reply from a legacy client that sent an unprefixed 16-byte
+        # HMAC-MD5 response. All messages using the modern protocol will
+        # be longer than either of these lengths.
+        return '', message
+    if (message.startswith(b'{') and
+        (curly := message.find(b'}', 1, _MAX_DIGEST_LEN+2)) > 0):
+        digest = message[1:curly]
+        if digest in _ALLOWED_DIGESTS:
+            payload = message[curly+1:]
+            return digest.decode('ascii'), payload
+    raise AuthenticationError(
+            'unsupported message length, missing digest prefix, '
+            f'or unsupported digest: {message=}')
+
+
+def _create_response(authkey, message):
+    """Create a MAC based on authkey and message
+
+    The MAC algorithm defaults to HMAC-MD5, unless MD5 is not available or
+    the message has a '{digest_name}' prefix. For legacy HMAC-MD5, the response
+    is the raw MAC, otherwise the response is prefixed with '{digest_name}',
+    e.g. b'{sha256}abcdefg...'
+
+    Note: The MAC protects the entire message including the digest_name prefix.
+    """
     import hmac
+    digest_name = _get_digest_name_and_payload(message)[0]
+    # The MAC protects the entire message: digest header and payload.
+    if not digest_name:
+        # Legacy server without a {digest} prefix on message.
+        # Generate a legacy non-prefixed HMAC-MD5 reply.
+        try:
+            return hmac.new(authkey, message, 'md5').digest()
+        except ValueError:
+            # HMAC-MD5 is not available (FIPS mode?), fall back to
+            # HMAC-SHA2-256 modern protocol. The legacy server probably
+            # doesn't support it and will reject us anyways. :shrug:
+            digest_name = 'sha256'
+    # Modern protocol, indicate the digest used in the reply.
+    response = hmac.new(authkey, message, digest_name).digest()
+    return b'{%s}%s' % (digest_name.encode('ascii'), response)
+
+
+def _verify_challenge(authkey, message, response):
+    """Verify MAC challenge
+
+    If our message did not include a digest_name prefix, the client is allowed
+    to select a stronger digest_name from _ALLOWED_DIGESTS.
+
+    In case our message is prefixed, a client cannot downgrade to a weaker
+    algorithm, because the MAC is calculated over the entire message
+    including the '{digest_name}' prefix.
+    """
+    import hmac
+    response_digest, response_mac = _get_digest_name_and_payload(response)
+    response_digest = response_digest or 'md5'
+    try:
+        expected = hmac.new(authkey, message, response_digest).digest()
+    except ValueError:
+        raise AuthenticationError(f'{response_digest=} unsupported')
+    if len(expected) != len(response_mac):
+        raise AuthenticationError(
+                f'expected {response_digest!r} of length {len(expected)} '
+                f'got {len(response_mac)}')
+    if not hmac.compare_digest(expected, response_mac):
+        raise AuthenticationError('digest received was wrong')
+
+
+def deliver_challenge(connection, authkey: bytes, digest_name='sha256'):
     if not isinstance(authkey, bytes):
         raise ValueError(
             "Authkey must be bytes, not {0!s}".format(type(authkey)))
+    assert MESSAGE_LENGTH > _MD5ONLY_MESSAGE_LENGTH, "protocol constraint"
     message = os.urandom(MESSAGE_LENGTH)
-    connection.send_bytes(CHALLENGE + message)
-    digest = hmac.new(authkey, message, 'md5').digest()
+    message = b'{%s}%s' % (digest_name.encode('ascii'), message)
+    # Even when sending a challenge to a legacy client that does not support
+    # digest prefixes, they'll take the entire thing as a challenge and
+    # respond to it with a raw HMAC-MD5.
+    connection.send_bytes(_CHALLENGE + message)
     response = connection.recv_bytes(256)        # reject large message
-    if response == digest:
-        connection.send_bytes(WELCOME)
+    try:
+        _verify_challenge(authkey, message, response)
+    except AuthenticationError:
+        connection.send_bytes(_FAILURE)
+        raise
     else:
-        connection.send_bytes(FAILURE)
-        raise AuthenticationError('digest received was wrong')
+        connection.send_bytes(_WELCOME)
 
-def answer_challenge(connection, authkey):
-    import hmac
+
+def answer_challenge(connection, authkey: bytes):
     if not isinstance(authkey, bytes):
         raise ValueError(
             "Authkey must be bytes, not {0!s}".format(type(authkey)))
     message = connection.recv_bytes(256)         # reject large message
-    assert message[:len(CHALLENGE)] == CHALLENGE, 'message = %r' % message
-    message = message[len(CHALLENGE):]
-    digest = hmac.new(authkey, message, 'md5').digest()
+    if not message.startswith(_CHALLENGE):
+        raise AuthenticationError(
+                f'Protocol error, expected challenge: {message=}')
+    message = message[len(_CHALLENGE):]
+    if len(message) < _MD5ONLY_MESSAGE_LENGTH:
+        raise AuthenticationError('challenge too short: {len(message)} bytes')
+    digest = _create_response(authkey, message)
     connection.send_bytes(digest)
     response = connection.recv_bytes(256)        # reject large message
-    if response != WELCOME:
+    if response != _WELCOME:
         raise AuthenticationError('digest sent was rejected')
 
 #
diff --git a/contrib/tools/python3/src/Lib/multiprocessing/context.py b/contrib/tools/python3/src/Lib/multiprocessing/context.py
index b1960ea296..de8a264829 100644
--- a/contrib/tools/python3/src/Lib/multiprocessing/context.py
+++ b/contrib/tools/python3/src/Lib/multiprocessing/context.py
@@ -258,6 +258,7 @@ class DefaultContext(BaseContext):
         return self._actual_context._name
 
     def get_all_start_methods(self):
+        """Returns a list of the supported start methods, default first."""
         if sys.platform == 'win32':
             return ['spawn']
         else:
diff --git a/contrib/tools/python3/src/Lib/multiprocessing/managers.py b/contrib/tools/python3/src/Lib/multiprocessing/managers.py
index 245b15f227..75d9c18c20 100644
--- a/contrib/tools/python3/src/Lib/multiprocessing/managers.py
+++ b/contrib/tools/python3/src/Lib/multiprocessing/managers.py
@@ -433,7 +433,6 @@ class Server(object):
                     self.id_to_refcount[ident] = 1
                     self.id_to_obj[ident] = \
                         self.id_to_local_proxy_obj[ident]
-                    obj, exposed, gettypeid = self.id_to_obj[ident]
                     util.debug('Server re-enabled tracking & INCREF %r', ident)
                 else:
                     raise ke
diff --git a/contrib/tools/python3/src/Lib/multiprocessing/pool.py b/contrib/tools/python3/src/Lib/multiprocessing/pool.py
index 961d7e5991..4f5d88cb97 100644
--- a/contrib/tools/python3/src/Lib/multiprocessing/pool.py
+++ b/contrib/tools/python3/src/Lib/multiprocessing/pool.py
@@ -696,7 +696,7 @@ class Pool(object):
 
         if (not result_handler.is_alive()) and (len(cache) != 0):
             raise AssertionError(
-                "Cannot have cache with result_hander not alive")
+                "Cannot have cache with result_handler not alive")
 
         result_handler._state = TERMINATE
         change_notifier.put(None)
diff --git a/contrib/tools/python3/src/Lib/multiprocessing/queues.py b/contrib/tools/python3/src/Lib/multiprocessing/queues.py
index f37f114a96..852ae87b27 100644
--- a/contrib/tools/python3/src/Lib/multiprocessing/queues.py
+++ b/contrib/tools/python3/src/Lib/multiprocessing/queues.py
@@ -158,6 +158,20 @@ class Queue(object):
         except AttributeError:
             pass
 
+    def _terminate_broken(self):
+        # Close a Queue on error.
+
+        # gh-94777: Prevent queue writing to a pipe which is no longer read.
+        self._reader.close()
+
+        # gh-107219: Close the connection writer which can unblock
+        # Queue._feed() if it was stuck in send_bytes().
+        if sys.platform == 'win32':
+            self._writer.close()
+
+        self.close()
+        self.join_thread()
+
     def _start_thread(self):
         debug('Queue._start_thread()')
 
@@ -169,13 +183,19 @@ class Queue(object):
                   self._wlock, self._reader.close, self._writer.close,
                   self._ignore_epipe, self._on_queue_feeder_error,
                   self._sem),
-            name='QueueFeederThread'
+            name='QueueFeederThread',
+            daemon=True,
         )
-        self._thread.daemon = True
 
-        debug('doing self._thread.start()')
-        self._thread.start()
-        debug('... done self._thread.start()')
+        try:
+            debug('doing self._thread.start()')
+            self._thread.start()
+            debug('... done self._thread.start()')
+        except:
+            # gh-109047: During Python finalization, creating a thread
+            # can fail with RuntimeError.
+            self._thread = None
+            raise
 
         if not self._joincancelled:
             self._jointhread = Finalize(
@@ -280,6 +300,8 @@ class Queue(object):
         import traceback
         traceback.print_exc()
 
+    __class_getitem__ = classmethod(types.GenericAlias)
+
 
 _sentinel = object()
 
diff --git a/contrib/tools/python3/src/Lib/netrc.py b/contrib/tools/python3/src/Lib/netrc.py
index c1358aac6a..b285fd8e35 100644
--- a/contrib/tools/python3/src/Lib/netrc.py
+++ b/contrib/tools/python3/src/Lib/netrc.py
@@ -2,7 +2,7 @@
 
 # Module and documentation by Eric S. Raymond, 21 Dec 1998
 
-import os, shlex, stat
+import os, stat
 
 __all__ = ["netrc", "NetrcParseError"]
 
diff --git a/contrib/tools/python3/src/Lib/ntpath.py b/contrib/tools/python3/src/Lib/ntpath.py
index 0246419485..df3402d46c 100644
--- a/contrib/tools/python3/src/Lib/ntpath.py
+++ b/contrib/tools/python3/src/Lib/ntpath.py
@@ -24,13 +24,13 @@ import genericpath
 from genericpath import *
 
 
-__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
+__all__ = ["normcase","isabs","join","splitdrive","splitroot","split","splitext",
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime", "islink","exists","lexists","isdir","isfile",
            "ismount", "expanduser","expandvars","normpath","abspath",
            "curdir","pardir","sep","pathsep","defpath","altsep",
            "extsep","devnull","realpath","supports_unicode_filenames","relpath",
-           "samefile", "sameopenfile", "samestat", "commonpath"]
+           "samefile", "sameopenfile", "samestat", "commonpath", "isjunction"]
 
 def _get_bothseps(path):
     if isinstance(path, bytes):
@@ -117,19 +117,21 @@ def join(path, *paths):
     try:
         if not paths:
             path[:0] + sep  #23780: Ensure compatible data type even if p is null.
-        result_drive, result_path = splitdrive(path)
+        result_drive, result_root, result_path = splitroot(path)
         for p in map(os.fspath, paths):
-            p_drive, p_path = splitdrive(p)
-            if p_path and p_path[0] in seps:
+            p_drive, p_root, p_path = splitroot(p)
+            if p_root:
                 # Second path is absolute
                 if p_drive or not result_drive:
                     result_drive = p_drive
+                result_root = p_root
                 result_path = p_path
                 continue
             elif p_drive and p_drive != result_drive:
                 if p_drive.lower() != result_drive.lower():
                     # Different drives => ignore the first path entirely
                     result_drive = p_drive
+                    result_root = p_root
                     result_path = p_path
                     continue
                 # Same drive in different case
@@ -139,10 +141,10 @@ def join(path, *paths):
                 result_path = result_path + sep
             result_path = result_path + p_path
         ## add separator between UNC and non-absolute path
-        if (result_path and result_path[0] not in seps and
-            result_drive and result_drive[-1:] != colon):
+        if (result_path and not result_root and
+            result_drive and result_drive[-1:] not in colon + seps):
             return result_drive + sep + result_path
-        return result_drive + result_path
+        return result_drive + result_root + result_path
     except (TypeError, AttributeError, BytesWarning):
         genericpath._check_arg_types('join', path, *paths)
         raise
@@ -170,34 +172,60 @@ def splitdrive(p):
     Paths cannot contain both a drive letter and a UNC path.
 
     """
+    drive, root, tail = splitroot(p)
+    return drive, root + tail
+
+
+def splitroot(p):
+    """Split a pathname into drive, root and tail. The drive is defined
+    exactly as in splitdrive(). On Windows, the root may be a single path
+    separator or an empty string. The tail contains anything after the root.
+    For example:
+
+        splitroot('//server/share/') == ('//server/share', '/', '')
+        splitroot('C:/Users/Barney') == ('C:', '/', 'Users/Barney')
+        splitroot('C:///spam///ham') == ('C:', '/', '//spam///ham')
+        splitroot('Windows/notepad') == ('', '', 'Windows/notepad')
+    """
     p = os.fspath(p)
-    if len(p) >= 2:
-        if isinstance(p, bytes):
-            sep = b'\\'
-            altsep = b'/'
-            colon = b':'
-            unc_prefix = b'\\\\?\\UNC\\'
-        else:
-            sep = '\\'
-            altsep = '/'
-            colon = ':'
-            unc_prefix = '\\\\?\\UNC\\'
-        normp = p.replace(altsep, sep)
-        if normp[0:2] == sep * 2:
+    if isinstance(p, bytes):
+        sep = b'\\'
+        altsep = b'/'
+        colon = b':'
+        unc_prefix = b'\\\\?\\UNC\\'
+        empty = b''
+    else:
+        sep = '\\'
+        altsep = '/'
+        colon = ':'
+        unc_prefix = '\\\\?\\UNC\\'
+        empty = ''
+    normp = p.replace(altsep, sep)
+    if normp[:1] == sep:
+        if normp[1:2] == sep:
             # UNC drives, e.g. \\server\share or \\?\UNC\server\share
             # Device drives, e.g. \\.\device or \\?\device
             start = 8 if normp[:8].upper() == unc_prefix else 2
             index = normp.find(sep, start)
             if index == -1:
-                return p, p[:0]
+                return p, empty, empty
             index2 = normp.find(sep, index + 1)
             if index2 == -1:
-                return p, p[:0]
-            return p[:index2], p[index2:]
-        if normp[1:2] == colon:
-            # Drive-letter drives, e.g. X:
-            return p[:2], p[2:]
-    return p[:0], p
+                return p, empty, empty
+            return p[:index2], p[index2:index2 + 1], p[index2 + 1:]
+        else:
+            # Relative path with root, e.g. \Windows
+            return empty, p[:1], p[1:]
+    elif normp[1:2] == colon:
+        if normp[2:3] == sep:
+            # Absolute drive-letter path, e.g. X:\Windows
+            return p[:2], p[2:3], p[3:]
+        else:
+            # Relative path with drive, e.g. X:Windows
+            return p[:2], empty, p[2:]
+    else:
+        # Relative path, e.g. Windows
+        return empty, empty, p
 
 
 # Split a path in head (everything up to the last '/') and tail (the
@@ -212,15 +240,13 @@ def split(p):
     Either part may be empty."""
     p = os.fspath(p)
     seps = _get_bothseps(p)
-    d, p = splitdrive(p)
+    d, r, p = splitroot(p)
     # set i to index beyond p's last slash
     i = len(p)
     while i and p[i-1] not in seps:
         i -= 1
     head, tail = p[:i], p[i:]  # now tail has no slashes
-    # remove trailing slashes from head, unless it's all slashes
-    head = head.rstrip(seps) or head
-    return d + head, tail
+    return d + r + head.rstrip(seps), tail
 
 
 # Split a path in root and extension.
@@ -250,18 +276,23 @@ def dirname(p):
     """Returns the directory component of a pathname"""
     return split(p)[0]
 
-# Is a path a symbolic link?
-# This will always return false on systems where os.lstat doesn't exist.
 
-def islink(path):
-    """Test whether a path is a symbolic link.
-    This will always return false for Windows prior to 6.0.
-    """
-    try:
-        st = os.lstat(path)
-    except (OSError, ValueError, AttributeError):
+# Is a path a junction?
+
+if hasattr(os.stat_result, 'st_reparse_tag'):
+    def isjunction(path):
+        """Test whether a path is a junction"""
+        try:
+            st = os.lstat(path)
+        except (OSError, ValueError, AttributeError):
+            return False
+        return bool(st.st_reparse_tag == stat.IO_REPARSE_TAG_MOUNT_POINT)
+else:
+    def isjunction(path):
+        """Test whether a path is a junction"""
+        os.fspath(path)
         return False
-    return stat.S_ISLNK(st.st_mode)
+
 
 # Being true for dangling symbolic links is also useful.
 
@@ -293,10 +324,10 @@ def ismount(path):
     path = os.fspath(path)
     seps = _get_bothseps(path)
     path = abspath(path)
-    root, rest = splitdrive(path)
-    if root and root[0] in seps:
-        return (not rest) or (rest in seps)
-    if rest and rest in seps:
+    drive, root, rest = splitroot(path)
+    if drive and drive[0] in seps:
+        return not rest
+    if root and not rest:
         return True
 
     if _getvolumepathname:
@@ -507,13 +538,8 @@ except ImportError:
             curdir = '.'
             pardir = '..'
         path = path.replace(altsep, sep)
-        prefix, path = splitdrive(path)
-
-        # collapse initial backslashes
-        if path.startswith(sep):
-            prefix += sep
-            path = path.lstrip(sep)
-
+        drive, root, path = splitroot(path)
+        prefix = drive + root
         comps = path.split(sep)
         i = 0
         while i < len(comps):
@@ -523,7 +549,7 @@ except ImportError:
                 if i > 0 and comps[i-1] != pardir:
                     del comps[i-1:i+1]
                     i -= 1
-                elif i == 0 and prefix.endswith(sep):
+                elif i == 0 and root:
                     del comps[i]
                 else:
                     i += 1
@@ -734,9 +760,8 @@ else:
         return path
 
 
-# Win9x family and earlier have no Unicode filename support.
-supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and
-                              sys.getwindowsversion()[3] >= 2)
+# All supported version have Unicode filename support.
+supports_unicode_filenames = True
 
 def relpath(path, start=None):
     """Return a relative version of a path"""
@@ -760,8 +785,8 @@ def relpath(path, start=None):
     try:
         start_abs = abspath(normpath(start))
         path_abs = abspath(normpath(path))
-        start_drive, start_rest = splitdrive(start_abs)
-        path_drive, path_rest = splitdrive(path_abs)
+        start_drive, _, start_rest = splitroot(start_abs)
+        path_drive, _, path_rest = splitroot(path_abs)
         if normcase(start_drive) != normcase(path_drive):
             raise ValueError("path is on mount %r, start on mount %r" % (
                 path_drive, start_drive))
@@ -811,21 +836,19 @@ def commonpath(paths):
         curdir = '.'
 
     try:
-        drivesplits = [splitdrive(p.replace(altsep, sep).lower()) for p in paths]
-        split_paths = [p.split(sep) for d, p in drivesplits]
+        drivesplits = [splitroot(p.replace(altsep, sep).lower()) for p in paths]
+        split_paths = [p.split(sep) for d, r, p in drivesplits]
 
-        try:
-            isabs, = set(p[:1] == sep for d, p in drivesplits)
-        except ValueError:
-            raise ValueError("Can't mix absolute and relative paths") from None
+        if len({r for d, r, p in drivesplits}) != 1:
+            raise ValueError("Can't mix absolute and relative paths")
 
         # Check that all drive letters or UNC paths match. The check is made only
         # now otherwise type errors for mixing strings and bytes would not be
         # caught.
-        if len(set(d for d, p in drivesplits)) != 1:
+        if len({d for d, r, p in drivesplits}) != 1:
             raise ValueError("Paths don't have the same drive")
 
-        drive, path = splitdrive(paths[0].replace(altsep, sep))
+        drive, root, path = splitroot(paths[0].replace(altsep, sep))
         common = path.split(sep)
         common = [c for c in common if c and c != curdir]
 
@@ -839,19 +862,36 @@ def commonpath(paths):
         else:
             common = common[:len(s1)]
 
-        prefix = drive + sep if isabs else drive
-        return prefix + sep.join(common)
+        return drive + root + sep.join(common)
     except (TypeError, AttributeError):
         genericpath._check_arg_types('commonpath', *paths)
         raise
 
 
 try:
-    # The genericpath.isdir implementation uses os.stat and checks the mode
-    # attribute to tell whether or not the path is a directory.
-    # This is overkill on Windows - just pass the path to GetFileAttributes
-    # and check the attribute from there.
-    from nt import _isdir as isdir
+    # The isdir(), isfile(), islink() and exists() implementations in
+    # genericpath use os.stat(). This is overkill on Windows. Use simpler
+    # builtin functions if they are available.
+    from nt import _path_isdir as isdir
+    from nt import _path_isfile as isfile
+    from nt import _path_islink as islink
+    from nt import _path_exists as exists
 except ImportError:
-    # Use genericpath.isdir as imported above.
+    # Use genericpath.* as imported above
     pass
+
+
+try:
+    from nt import _path_isdevdrive
+except ImportError:
+    def isdevdrive(path):
+        """Determines whether the specified path is on a Windows Dev Drive."""
+        # Never a Dev Drive
+        return False
+else:
+    def isdevdrive(path):
+        """Determines whether the specified path is on a Windows Dev Drive."""
+        try:
+            return _path_isdevdrive(abspath(path))
+        except OSError:
+            return False
diff --git a/contrib/tools/python3/src/Lib/numbers.py b/contrib/tools/python3/src/Lib/numbers.py
index 0985dd85f6..a2913e32cf 100644
--- a/contrib/tools/python3/src/Lib/numbers.py
+++ b/contrib/tools/python3/src/Lib/numbers.py
@@ -5,6 +5,31 @@
 
 TODO: Fill out more detailed documentation on the operators."""
 
+############ Maintenance notes #########################################
+#
+# ABCs are different from other standard library modules in that they
+# specify compliance tests.  In general, once an ABC has been published,
+# new methods (either abstract or concrete) cannot be added.
+#
+# Though classes that inherit from an ABC would automatically receive a
+# new mixin method, registered classes would become non-compliant and
+# violate the contract promised by ``isinstance(someobj, SomeABC)``.
+#
+# Though irritating, the correct procedure for adding new abstract or
+# mixin methods is to create a new ABC as a subclass of the previous
+# ABC.
+#
+# Because they are so hard to change, new ABCs should have their APIs
+# carefully thought through prior to publication.
+#
+# Since ABCMeta only checks for the presence of methods, it is possible
+# to alter the signature of a method by adding optional arguments
+# or changing parameter names.  This is still a bit dubious but at
+# least it won't cause isinstance() to return an incorrect result.
+#
+#
+#######################################################################
+
 from abc import ABCMeta, abstractmethod
 
 __all__ = ["Number", "Complex", "Real", "Rational", "Integral"]
@@ -118,7 +143,7 @@ class Complex(Number):
 
     @abstractmethod
     def __pow__(self, exponent):
-        """self**exponent; should promote to float or complex when necessary."""
+        """self ** exponent; should promote to float or complex when necessary."""
         raise NotImplementedError
 
     @abstractmethod
@@ -167,7 +192,7 @@ class Real(Complex):
         """trunc(self): Truncates self to an Integral.
 
         Returns an Integral i such that:
-          * i>0 iff self>0;
+          * i > 0 iff self > 0;
           * abs(i) <= abs(self);
           * for any Integral j satisfying the first two conditions,
             abs(i) >= abs(j) [i.e. i has "maximal" abs among those].
@@ -203,7 +228,7 @@ class Real(Complex):
         return (self // other, self % other)
 
     def __rdivmod__(self, other):
-        """divmod(other, self): The pair (self // other, self % other).
+        """divmod(other, self): The pair (other // self, other % self).
 
         Sometimes this can be computed faster than the pair of
         operations.
diff --git a/contrib/tools/python3/src/Lib/opcode.py b/contrib/tools/python3/src/Lib/opcode.py
index bc3c02af2b..6bb2f1c140 100644
--- a/contrib/tools/python3/src/Lib/opcode.py
+++ b/contrib/tools/python3/src/Lib/opcode.py
@@ -4,9 +4,9 @@ opcode module - potentially shared between dis and other modules which
 operate on bytecodes (e.g. peephole optimizers).
 """
 
-__all__ = ["cmp_op", "hasconst", "hasname", "hasjrel", "hasjabs",
-           "haslocal", "hascompare", "hasfree", "opname", "opmap",
-           "HAVE_ARGUMENT", "EXTENDED_ARG", "hasnargs"]
+__all__ = ["cmp_op", "hasarg", "hasconst", "hasname", "hasjrel", "hasjabs",
+           "haslocal", "hascompare", "hasfree", "hasexc", "opname", "opmap",
+           "HAVE_ARGUMENT", "EXTENDED_ARG"]
 
 # It's a chicken-and-egg I'm afraid:
 # We're imported before _opcode's made.
@@ -23,6 +23,7 @@ except ImportError:
 
 cmp_op = ('<', '<=', '==', '!=', '>', '>=')
 
+hasarg = []
 hasconst = []
 hasname = []
 hasjrel = []
@@ -30,13 +31,24 @@ hasjabs = []
 haslocal = []
 hascompare = []
 hasfree = []
-hasnargs = [] # unused
+hasexc = []
+
+
+ENABLE_SPECIALIZATION = True
+
+def is_pseudo(op):
+    return op >= MIN_PSEUDO_OPCODE and op <= MAX_PSEUDO_OPCODE
+
+oplists = [hasarg, hasconst, hasname, hasjrel, hasjabs,
+           haslocal, hascompare, hasfree, hasexc]
 
 opmap = {}
-opname = ['<%r>' % (op,) for op in range(256)]
+
+## pseudo opcodes (used in the compiler) mapped to the values
+## they can become in the actual code.
+_pseudo_ops = {}
 
 def def_op(name, op):
-    opname[op] = name
     opmap[name] = op
 
 def name_op(name, op):
@@ -51,21 +63,42 @@ def jabs_op(name, op):
     def_op(name, op)
     hasjabs.append(op)
 
+def pseudo_op(name, op, real_ops):
+    def_op(name, op)
+    _pseudo_ops[name] = real_ops
+    # add the pseudo opcode to the lists its targets are in
+    for oplist in oplists:
+        res = [opmap[rop] in oplist for rop in real_ops]
+        if any(res):
+            assert all(res)
+            oplist.append(op)
+
+
 # Instruction opcodes for compiled code
 # Blank lines correspond to available opcodes
 
 def_op('CACHE', 0)
 def_op('POP_TOP', 1)
 def_op('PUSH_NULL', 2)
+def_op('INTERPRETER_EXIT', 3)
+
+def_op('END_FOR', 4)
+def_op('END_SEND', 5)
 
 def_op('NOP', 9)
-def_op('UNARY_POSITIVE', 10)
+
 def_op('UNARY_NEGATIVE', 11)
 def_op('UNARY_NOT', 12)
 
 def_op('UNARY_INVERT', 15)
 
+# We reserve 17 as it is the initial value for the specializing counter
+# This helps us catch cases where we attempt to execute a cache.
+def_op('RESERVED', 17)
+
 def_op('BINARY_SUBSCR', 25)
+def_op('BINARY_SLICE', 26)
+def_op('STORE_SLICE', 27)
 
 def_op('GET_LEN', 30)
 def_op('MATCH_MAPPING', 31)
@@ -82,28 +115,27 @@ def_op('GET_ANEXT', 51)
 def_op('BEFORE_ASYNC_WITH', 52)
 def_op('BEFORE_WITH', 53)
 def_op('END_ASYNC_FOR', 54)
+def_op('CLEANUP_THROW', 55)
 
 def_op('STORE_SUBSCR', 60)
 def_op('DELETE_SUBSCR', 61)
 
 def_op('GET_ITER', 68)
 def_op('GET_YIELD_FROM_ITER', 69)
-def_op('PRINT_EXPR', 70)
+
 def_op('LOAD_BUILD_CLASS', 71)
 
 def_op('LOAD_ASSERTION_ERROR', 74)
 def_op('RETURN_GENERATOR', 75)
 
-def_op('LIST_TO_TUPLE', 82)
 def_op('RETURN_VALUE', 83)
-def_op('IMPORT_STAR', 84)
+
 def_op('SETUP_ANNOTATIONS', 85)
-def_op('YIELD_VALUE', 86)
-def_op('ASYNC_GEN_WRAP', 87)
-def_op('PREP_RERAISE_STAR', 88)
+def_op('LOAD_LOCALS', 87)
+
 def_op('POP_EXCEPT', 89)
 
-HAVE_ARGUMENT = 90              # Opcodes from here have an argument:
+HAVE_ARGUMENT = 90             # real opcodes from here have an argument:
 
 name_op('STORE_NAME', 90)       # Index in name list
 name_op('DELETE_NAME', 91)      # ""
@@ -128,25 +160,27 @@ hascompare.append(107)
 name_op('IMPORT_NAME', 108)     # Index in name list
 name_op('IMPORT_FROM', 109)     # Index in name list
 jrel_op('JUMP_FORWARD', 110)    # Number of words to skip
-jrel_op('JUMP_IF_FALSE_OR_POP', 111) # Number of words to skip
-jrel_op('JUMP_IF_TRUE_OR_POP', 112)  # ""
-jrel_op('POP_JUMP_FORWARD_IF_FALSE', 114)
-jrel_op('POP_JUMP_FORWARD_IF_TRUE', 115)
+jrel_op('POP_JUMP_IF_FALSE', 114)
+jrel_op('POP_JUMP_IF_TRUE', 115)
 name_op('LOAD_GLOBAL', 116)     # Index in name list
 def_op('IS_OP', 117)
 def_op('CONTAINS_OP', 118)
 def_op('RERAISE', 119)
 def_op('COPY', 120)
+def_op('RETURN_CONST', 121)
+hasconst.append(121)
 def_op('BINARY_OP', 122)
-jrel_op('SEND', 123) # Number of bytes to skip
-def_op('LOAD_FAST', 124)        # Local variable number
+jrel_op('SEND', 123)            # Number of words to skip
+def_op('LOAD_FAST', 124)        # Local variable number, no null check
 haslocal.append(124)
 def_op('STORE_FAST', 125)       # Local variable number
 haslocal.append(125)
 def_op('DELETE_FAST', 126)      # Local variable number
 haslocal.append(126)
-jrel_op('POP_JUMP_FORWARD_IF_NOT_NONE', 128)
-jrel_op('POP_JUMP_FORWARD_IF_NONE', 129)
+def_op('LOAD_FAST_CHECK', 127)  # Local variable number
+haslocal.append(127)
+jrel_op('POP_JUMP_IF_NOT_NONE', 128)
+jrel_op('POP_JUMP_IF_NONE', 129)
 def_op('RAISE_VARARGS', 130)    # Number of raise arguments (1, 2, or 3)
 def_op('GET_AWAITABLE', 131)
 def_op('MAKE_FUNCTION', 132)    # Flags
@@ -163,18 +197,19 @@ hasfree.append(138)
 def_op('DELETE_DEREF', 139)
 hasfree.append(139)
 jrel_op('JUMP_BACKWARD', 140)    # Number of words to skip (backwards)
-
+name_op('LOAD_SUPER_ATTR', 141)
 def_op('CALL_FUNCTION_EX', 142)  # Flags
+def_op('LOAD_FAST_AND_CLEAR', 143)  # Local variable number
+haslocal.append(143)
 
 def_op('EXTENDED_ARG', 144)
 EXTENDED_ARG = 144
 def_op('LIST_APPEND', 145)
 def_op('SET_ADD', 146)
 def_op('MAP_ADD', 147)
-def_op('LOAD_CLASSDEREF', 148)
 hasfree.append(148)
 def_op('COPY_FREE_VARS', 149)
-
+def_op('YIELD_VALUE', 150)
 def_op('RESUME', 151)   # This must be kept in sync with deepfreeze.py
 def_op('MATCH_CLASS', 152)
 
@@ -182,25 +217,74 @@ def_op('FORMAT_VALUE', 155)
 def_op('BUILD_CONST_KEY_MAP', 156)
 def_op('BUILD_STRING', 157)
 
-name_op('LOAD_METHOD', 160)
-
 def_op('LIST_EXTEND', 162)
 def_op('SET_UPDATE', 163)
 def_op('DICT_MERGE', 164)
 def_op('DICT_UPDATE', 165)
-def_op('PRECALL', 166)
 
 def_op('CALL', 171)
 def_op('KW_NAMES', 172)
 hasconst.append(172)
+def_op('CALL_INTRINSIC_1', 173)
+def_op('CALL_INTRINSIC_2', 174)
+
+name_op('LOAD_FROM_DICT_OR_GLOBALS', 175)
+def_op('LOAD_FROM_DICT_OR_DEREF', 176)
+hasfree.append(176)
+
+# Instrumented instructions
+MIN_INSTRUMENTED_OPCODE = 237
+
+def_op('INSTRUMENTED_LOAD_SUPER_ATTR', 237)
+def_op('INSTRUMENTED_POP_JUMP_IF_NONE', 238)
+def_op('INSTRUMENTED_POP_JUMP_IF_NOT_NONE', 239)
+def_op('INSTRUMENTED_RESUME', 240)
+def_op('INSTRUMENTED_CALL', 241)
+def_op('INSTRUMENTED_RETURN_VALUE', 242)
+def_op('INSTRUMENTED_YIELD_VALUE', 243)
+def_op('INSTRUMENTED_CALL_FUNCTION_EX', 244)
+def_op('INSTRUMENTED_JUMP_FORWARD', 245)
+def_op('INSTRUMENTED_JUMP_BACKWARD', 246)
+def_op('INSTRUMENTED_RETURN_CONST', 247)
+def_op('INSTRUMENTED_FOR_ITER', 248)
+def_op('INSTRUMENTED_POP_JUMP_IF_FALSE', 249)
+def_op('INSTRUMENTED_POP_JUMP_IF_TRUE', 250)
+def_op('INSTRUMENTED_END_FOR', 251)
+def_op('INSTRUMENTED_END_SEND', 252)
+def_op('INSTRUMENTED_INSTRUCTION', 253)
+def_op('INSTRUMENTED_LINE', 254)
+# 255 is reserved
+
+hasarg.extend([op for op in opmap.values() if op >= HAVE_ARGUMENT])
+
+MIN_PSEUDO_OPCODE = 256
+
+pseudo_op('SETUP_FINALLY', 256, ['NOP'])
+hasexc.append(256)
+pseudo_op('SETUP_CLEANUP', 257, ['NOP'])
+hasexc.append(257)
+pseudo_op('SETUP_WITH', 258, ['NOP'])
+hasexc.append(258)
+pseudo_op('POP_BLOCK', 259, ['NOP'])
+
+pseudo_op('JUMP', 260, ['JUMP_FORWARD', 'JUMP_BACKWARD'])
+pseudo_op('JUMP_NO_INTERRUPT', 261, ['JUMP_FORWARD', 'JUMP_BACKWARD_NO_INTERRUPT'])
+
+pseudo_op('LOAD_METHOD', 262, ['LOAD_ATTR'])
+pseudo_op('LOAD_SUPER_METHOD', 263, ['LOAD_SUPER_ATTR'])
+pseudo_op('LOAD_ZERO_SUPER_METHOD', 264, ['LOAD_SUPER_ATTR'])
+pseudo_op('LOAD_ZERO_SUPER_ATTR', 265, ['LOAD_SUPER_ATTR'])
+
+pseudo_op('STORE_FAST_MAYBE_NULL', 266, ['STORE_FAST'])
+
+MAX_PSEUDO_OPCODE = MIN_PSEUDO_OPCODE + len(_pseudo_ops) - 1
+
+del def_op, name_op, jrel_op, jabs_op, pseudo_op
+
+opname = ['<%r>' % (op,) for op in range(MAX_PSEUDO_OPCODE + 1)]
+for op, i in opmap.items():
+    opname[i] = op
 
-jrel_op('POP_JUMP_BACKWARD_IF_NOT_NONE', 173)
-jrel_op('POP_JUMP_BACKWARD_IF_NONE', 174)
-jrel_op('POP_JUMP_BACKWARD_IF_FALSE', 175)
-jrel_op('POP_JUMP_BACKWARD_IF_TRUE', 176)
-
-
-del def_op, name_op, jrel_op, jabs_op
 
 _nb_ops = [
     ("NB_ADD", "+"),
@@ -231,9 +315,31 @@ _nb_ops = [
     ("NB_INPLACE_XOR", "^="),
 ]
 
+_intrinsic_1_descs = [
+    "INTRINSIC_1_INVALID",
+    "INTRINSIC_PRINT",
+    "INTRINSIC_IMPORT_STAR",
+    "INTRINSIC_STOPITERATION_ERROR",
+    "INTRINSIC_ASYNC_GEN_WRAP",
+    "INTRINSIC_UNARY_POSITIVE",
+    "INTRINSIC_LIST_TO_TUPLE",
+    "INTRINSIC_TYPEVAR",
+    "INTRINSIC_PARAMSPEC",
+    "INTRINSIC_TYPEVARTUPLE",
+    "INTRINSIC_SUBSCRIPT_GENERIC",
+    "INTRINSIC_TYPEALIAS",
+]
+
+_intrinsic_2_descs = [
+    "INTRINSIC_2_INVALID",
+    "INTRINSIC_PREP_RERAISE_STAR",
+    "INTRINSIC_TYPEVAR_WITH_BOUND",
+    "INTRINSIC_TYPEVAR_WITH_CONSTRAINTS",
+    "INTRINSIC_SET_FUNCTION_TYPE_PARAMS",
+]
+
 _specializations = {
     "BINARY_OP": [
-        "BINARY_OP_ADAPTIVE",
         "BINARY_OP_ADD_FLOAT",
         "BINARY_OP_ADD_INT",
         "BINARY_OP_ADD_UNICODE",
@@ -244,35 +350,58 @@ _specializations = {
         "BINARY_OP_SUBTRACT_INT",
     ],
     "BINARY_SUBSCR": [
-        "BINARY_SUBSCR_ADAPTIVE",
         "BINARY_SUBSCR_DICT",
         "BINARY_SUBSCR_GETITEM",
         "BINARY_SUBSCR_LIST_INT",
         "BINARY_SUBSCR_TUPLE_INT",
     ],
     "CALL": [
-        "CALL_ADAPTIVE",
         "CALL_PY_EXACT_ARGS",
         "CALL_PY_WITH_DEFAULTS",
+        "CALL_BOUND_METHOD_EXACT_ARGS",
+        "CALL_BUILTIN_CLASS",
+        "CALL_BUILTIN_FAST_WITH_KEYWORDS",
+        "CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS",
+        "CALL_NO_KW_BUILTIN_FAST",
+        "CALL_NO_KW_BUILTIN_O",
+        "CALL_NO_KW_ISINSTANCE",
+        "CALL_NO_KW_LEN",
+        "CALL_NO_KW_LIST_APPEND",
+        "CALL_NO_KW_METHOD_DESCRIPTOR_FAST",
+        "CALL_NO_KW_METHOD_DESCRIPTOR_NOARGS",
+        "CALL_NO_KW_METHOD_DESCRIPTOR_O",
+        "CALL_NO_KW_STR_1",
+        "CALL_NO_KW_TUPLE_1",
+        "CALL_NO_KW_TYPE_1",
     ],
     "COMPARE_OP": [
-        "COMPARE_OP_ADAPTIVE",
-        "COMPARE_OP_FLOAT_JUMP",
-        "COMPARE_OP_INT_JUMP",
-        "COMPARE_OP_STR_JUMP",
+        "COMPARE_OP_FLOAT",
+        "COMPARE_OP_INT",
+        "COMPARE_OP_STR",
     ],
-    "EXTENDED_ARG": [
-        "EXTENDED_ARG_QUICK",
+    "FOR_ITER": [
+        "FOR_ITER_LIST",
+        "FOR_ITER_TUPLE",
+        "FOR_ITER_RANGE",
+        "FOR_ITER_GEN",
     ],
-    "JUMP_BACKWARD": [
-        "JUMP_BACKWARD_QUICK",
+    "LOAD_SUPER_ATTR": [
+        "LOAD_SUPER_ATTR_ATTR",
+        "LOAD_SUPER_ATTR_METHOD",
     ],
     "LOAD_ATTR": [
-        "LOAD_ATTR_ADAPTIVE",
+        # These potentially push [NULL, bound method] onto the stack.
+        "LOAD_ATTR_CLASS",
+        "LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN",
         "LOAD_ATTR_INSTANCE_VALUE",
         "LOAD_ATTR_MODULE",
+        "LOAD_ATTR_PROPERTY",
         "LOAD_ATTR_SLOT",
         "LOAD_ATTR_WITH_HINT",
+        # These will always push [unbound method, self] onto the stack.
+        "LOAD_ATTR_METHOD_LAZY_DICT",
+        "LOAD_ATTR_METHOD_NO_DICT",
+        "LOAD_ATTR_METHOD_WITH_VALUES",
     ],
     "LOAD_CONST": [
         "LOAD_CONST__LOAD_FAST",
@@ -282,42 +411,10 @@ _specializations = {
         "LOAD_FAST__LOAD_FAST",
     ],
     "LOAD_GLOBAL": [
-        "LOAD_GLOBAL_ADAPTIVE",
         "LOAD_GLOBAL_BUILTIN",
         "LOAD_GLOBAL_MODULE",
     ],
-    "LOAD_METHOD": [
-        "LOAD_METHOD_ADAPTIVE",
-        "LOAD_METHOD_CLASS",
-        "LOAD_METHOD_MODULE",
-        "LOAD_METHOD_NO_DICT",
-        "LOAD_METHOD_WITH_DICT",
-        "LOAD_METHOD_WITH_VALUES",
-    ],
-    "PRECALL": [
-        "PRECALL_ADAPTIVE",
-        "PRECALL_BOUND_METHOD",
-        "PRECALL_BUILTIN_CLASS",
-        "PRECALL_BUILTIN_FAST_WITH_KEYWORDS",
-        "PRECALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS",
-        "PRECALL_NO_KW_BUILTIN_FAST",
-        "PRECALL_NO_KW_BUILTIN_O",
-        "PRECALL_NO_KW_ISINSTANCE",
-        "PRECALL_NO_KW_LEN",
-        "PRECALL_NO_KW_LIST_APPEND",
-        "PRECALL_NO_KW_METHOD_DESCRIPTOR_FAST",
-        "PRECALL_NO_KW_METHOD_DESCRIPTOR_NOARGS",
-        "PRECALL_NO_KW_METHOD_DESCRIPTOR_O",
-        "PRECALL_NO_KW_STR_1",
-        "PRECALL_NO_KW_TUPLE_1",
-        "PRECALL_NO_KW_TYPE_1",
-        "PRECALL_PYFUNC",
-    ],
-    "RESUME": [
-        "RESUME_QUICK",
-    ],
     "STORE_ATTR": [
-        "STORE_ATTR_ADAPTIVE",
         "STORE_ATTR_INSTANCE_VALUE",
         "STORE_ATTR_SLOT",
         "STORE_ATTR_WITH_HINT",
@@ -327,34 +424,27 @@ _specializations = {
         "STORE_FAST__STORE_FAST",
     ],
     "STORE_SUBSCR": [
-        "STORE_SUBSCR_ADAPTIVE",
         "STORE_SUBSCR_DICT",
         "STORE_SUBSCR_LIST_INT",
     ],
     "UNPACK_SEQUENCE": [
-        "UNPACK_SEQUENCE_ADAPTIVE",
         "UNPACK_SEQUENCE_LIST",
         "UNPACK_SEQUENCE_TUPLE",
         "UNPACK_SEQUENCE_TWO_TUPLE",
     ],
+    "SEND": [
+        "SEND_GEN",
+    ],
 }
 _specialized_instructions = [
     opcode for family in _specializations.values() for opcode in family
 ]
-_specialization_stats = [
-    "success",
-    "failure",
-    "hit",
-    "deferred",
-    "miss",
-    "deopt",
-]
 
 _cache_format = {
     "LOAD_GLOBAL": {
         "counter": 1,
         "index": 1,
-        "module_keys_version": 2,
+        "module_keys_version": 1,
         "builtin_keys_version": 1,
     },
     "BINARY_OP": {
@@ -365,39 +455,35 @@ _cache_format = {
     },
     "COMPARE_OP": {
         "counter": 1,
-        "mask": 1,
     },
     "BINARY_SUBSCR": {
         "counter": 1,
-        "type_version": 2,
-        "func_version": 1,
+    },
+    "FOR_ITER": {
+        "counter": 1,
+    },
+    "LOAD_SUPER_ATTR": {
+        "counter": 1,
     },
     "LOAD_ATTR": {
         "counter": 1,
         "version": 2,
-        "index": 1,
+        "keys_version": 2,
+        "descr": 4,
     },
     "STORE_ATTR": {
         "counter": 1,
         "version": 2,
         "index": 1,
     },
-    "LOAD_METHOD": {
-        "counter": 1,
-        "type_version": 2,
-        "dict_offset": 1,
-        "keys_version": 2,
-        "descr": 4,
-    },
     "CALL": {
         "counter": 1,
         "func_version": 2,
-        "min_args": 1,
     },
-    "PRECALL": {
+    "STORE_SUBSCR": {
         "counter": 1,
     },
-    "STORE_SUBSCR": {
+    "SEND": {
         "counter": 1,
     },
 }
diff --git a/contrib/tools/python3/src/Lib/os.py b/contrib/tools/python3/src/Lib/os.py
index fd1e774fdc..598c9e5023 100644
--- a/contrib/tools/python3/src/Lib/os.py
+++ b/contrib/tools/python3/src/Lib/os.py
@@ -340,89 +340,95 @@ def walk(top, topdown=True, onerror=None, followlinks=False):
 
     """
     sys.audit("os.walk", top, topdown, onerror, followlinks)
-    return _walk(fspath(top), topdown, onerror, followlinks)
-
-def _walk(top, topdown, onerror, followlinks):
-    dirs = []
-    nondirs = []
-    walk_dirs = []
-
-    # We may not have read permission for top, in which case we can't
-    # get a list of the files the directory contains.  os.walk
-    # always suppressed the exception then, rather than blow up for a
-    # minor reason when (say) a thousand readable directories are still
-    # left to visit.  That logic is copied here.
-    try:
-        # Note that scandir is global in this module due
-        # to earlier import-*.
-        scandir_it = scandir(top)
-    except OSError as error:
-        if onerror is not None:
-            onerror(error)
-        return
 
-    with scandir_it:
-        while True:
-            try:
+    stack = [fspath(top)]
+    islink, join = path.islink, path.join
+    while stack:
+        top = stack.pop()
+        if isinstance(top, tuple):
+            yield top
+            continue
+
+        dirs = []
+        nondirs = []
+        walk_dirs = []
+
+        # We may not have read permission for top, in which case we can't
+        # get a list of the files the directory contains.
+        # We suppress the exception here, rather than blow up for a
+        # minor reason when (say) a thousand readable directories are still
+        # left to visit.
+        try:
+            scandir_it = scandir(top)
+        except OSError as error:
+            if onerror is not None:
+                onerror(error)
+            continue
+
+        cont = False
+        with scandir_it:
+            while True:
                 try:
-                    entry = next(scandir_it)
-                except StopIteration:
+                    try:
+                        entry = next(scandir_it)
+                    except StopIteration:
+                        break
+                except OSError as error:
+                    if onerror is not None:
+                        onerror(error)
+                    cont = True
                     break
-            except OSError as error:
-                if onerror is not None:
-                    onerror(error)
-                return
 
-            try:
-                is_dir = entry.is_dir()
-            except OSError:
-                # If is_dir() raises an OSError, consider that the entry is not
-                # a directory, same behaviour than os.path.isdir().
-                is_dir = False
-
-            if is_dir:
-                dirs.append(entry.name)
-            else:
-                nondirs.append(entry.name)
+                try:
+                    is_dir = entry.is_dir()
+                except OSError:
+                    # If is_dir() raises an OSError, consider the entry not to
+                    # be a directory, same behaviour as os.path.isdir().
+                    is_dir = False
 
-            if not topdown and is_dir:
-                # Bottom-up: recurse into sub-directory, but exclude symlinks to
-                # directories if followlinks is False
-                if followlinks:
-                    walk_into = True
+                if is_dir:
+                    dirs.append(entry.name)
                 else:
-                    try:
-                        is_symlink = entry.is_symlink()
-                    except OSError:
-                        # If is_symlink() raises an OSError, consider that the
-                        # entry is not a symbolic link, same behaviour than
-                        # os.path.islink().
-                        is_symlink = False
-                    walk_into = not is_symlink
-
-                if walk_into:
-                    walk_dirs.append(entry.path)
-
-    # Yield before recursion if going top down
-    if topdown:
-        yield top, dirs, nondirs
-
-        # Recurse into sub-directories
-        islink, join = path.islink, path.join
-        for dirname in dirs:
-            new_path = join(top, dirname)
-            # Issue #23605: os.path.islink() is used instead of caching
-            # entry.is_symlink() result during the loop on os.scandir() because
-            # the caller can replace the directory entry during the "yield"
-            # above.
-            if followlinks or not islink(new_path):
-                yield from _walk(new_path, topdown, onerror, followlinks)
-    else:
-        # Recurse into sub-directories
-        for new_path in walk_dirs:
-            yield from _walk(new_path, topdown, onerror, followlinks)
-        # Yield after recursion if going bottom up
-        yield top, dirs, nondirs
+                    nondirs.append(entry.name)
+
+                if not topdown and is_dir:
+                    # Bottom-up: traverse into sub-directory, but exclude
+                    # symlinks to directories if followlinks is False
+                    if followlinks:
+                        walk_into = True
+                    else:
+                        try:
+                            is_symlink = entry.is_symlink()
+                        except OSError:
+                            # If is_symlink() raises an OSError, consider the
+                            # entry not to be a symbolic link, same behaviour
+                            # as os.path.islink().
+                            is_symlink = False
+                        walk_into = not is_symlink
+
+                    if walk_into:
+                        walk_dirs.append(entry.path)
+        if cont:
+            continue
+
+        if topdown:
+            # Yield before sub-directory traversal if going top down
+            yield top, dirs, nondirs
+            # Traverse into sub-directories
+            for dirname in reversed(dirs):
+                new_path = join(top, dirname)
+                # bpo-23605: os.path.islink() is used instead of caching
+                # entry.is_symlink() result during the loop on os.scandir() because
+                # the caller can replace the directory entry during the "yield"
+                # above.
+                if followlinks or not islink(new_path):
+                    stack.append(new_path)
+        else:
+            # Yield after sub-directory traversal if going bottom up
+            stack.append((top, dirs, nondirs))
+            # Traverse into sub-directories
+            for new_path in reversed(walk_dirs):
+                stack.append(new_path)
 
 __all__.append("walk")
 
diff --git a/contrib/tools/python3/src/Lib/pathlib.py b/contrib/tools/python3/src/Lib/pathlib.py
index ecb1e8a40d..bd5a096f9e 100644
--- a/contrib/tools/python3/src/Lib/pathlib.py
+++ b/contrib/tools/python3/src/Lib/pathlib.py
@@ -1,3 +1,10 @@
+"""Object-oriented filesystem paths.
+
+This module provides classes to represent abstract paths and concrete
+paths with operations that have semantics appropriate for different
+operating systems.
+"""
+
 import fnmatch
 import functools
 import io
@@ -9,7 +16,6 @@ import sys
 import warnings
 from _collections_abc import Sequence
 from errno import ENOENT, ENOTDIR, EBADF, ELOOP
-from operator import attrgetter
 from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
 from urllib.parse import quote_from_bytes as urlquote_from_bytes
 
@@ -23,6 +29,14 @@ __all__ = [
 # Internals
 #
 
+# Reference for Windows paths can be found at
+# https://learn.microsoft.com/en-gb/windows/win32/fileio/naming-a-file .
+_WIN_RESERVED_NAMES = frozenset(
+    {'CON', 'PRN', 'AUX', 'NUL', 'CONIN$', 'CONOUT$'} |
+    {f'COM{c}' for c in '123456789\xb9\xb2\xb3'} |
+    {f'LPT{c}' for c in '123456789\xb9\xb2\xb3'}
+)
+
 _WINERROR_NOT_READY = 21  # drive exists but is not accessible
 _WINERROR_INVALID_NAME = 123  # fix for bpo-35306
 _WINERROR_CANT_RESOLVE_FILENAME = 1921  # broken symlink pointing to itself
@@ -40,271 +54,108 @@ def _ignore_error(exception):
             getattr(exception, 'winerror', None) in _IGNORED_WINERRORS)
 
 
-def _is_wildcard_pattern(pat):
-    # Whether this pattern needs actual matching using fnmatch, or can
-    # be looked up directly as a file.
-    return "*" in pat or "?" in pat or "[" in pat
+@functools.cache
+def _is_case_sensitive(flavour):
+    return flavour.normcase('Aa') == 'Aa'
 
+#
+# Globbing helpers
+#
 
-class _Flavour(object):
-    """A flavour implements a particular (platform-specific) set of path
-    semantics."""
 
-    def __init__(self):
-        self.join = self.sep.join
+# fnmatch.translate() returns a regular expression that includes a prefix and
+# a suffix, which enable matching newlines and ensure the end of the string is
+# matched, respectively. These features are undesirable for our implementation
+# of PurePatch.match(), which represents path separators as newlines and joins
+# pattern segments together. As a workaround, we define a slice object that
+# can remove the prefix and suffix from any translate() result. See the
+# _compile_pattern_lines() function for more details.
+_FNMATCH_PREFIX, _FNMATCH_SUFFIX = fnmatch.translate('_').split('_')
+_FNMATCH_SLICE = slice(len(_FNMATCH_PREFIX), -len(_FNMATCH_SUFFIX))
+_SWAP_SEP_AND_NEWLINE = {
+    '/': str.maketrans({'/': '\n', '\n': '/'}),
+    '\\': str.maketrans({'\\': '\n', '\n': '\\'}),
+}
 
-    def parse_parts(self, parts):
-        parsed = []
-        sep = self.sep
-        altsep = self.altsep
-        drv = root = ''
-        it = reversed(parts)
-        for part in it:
-            if not part:
-                continue
-            if altsep:
-                part = part.replace(altsep, sep)
-            drv, root, rel = self.splitroot(part)
-            if sep in rel:
-                for x in reversed(rel.split(sep)):
-                    if x and x != '.':
-                        parsed.append(sys.intern(x))
-            else:
-                if rel and rel != '.':
-                    parsed.append(sys.intern(rel))
-            if drv or root:
-                if not drv:
-                    # If no drive is present, try to find one in the previous
-                    # parts. This makes the result of parsing e.g.
-                    # ("C:", "/", "a") reasonably intuitive.
-                    for part in it:
-                        if not part:
-                            continue
-                        if altsep:
-                            part = part.replace(altsep, sep)
-                        drv = self.splitroot(part)[0]
-                        if drv:
-                            break
-                break
-        if drv or root:
-            parsed.append(drv + root)
-        parsed.reverse()
-        return drv, root, parsed
-
-    def join_parsed_parts(self, drv, root, parts, drv2, root2, parts2):
-        """
-        Join the two paths represented by the respective
-        (drive, root, parts) tuples.  Return a new (drive, root, parts) tuple.
-        """
-        if root2:
-            if not drv2 and drv:
-                return drv, root2, [drv + root2] + parts2[1:]
-        elif drv2:
-            if drv2 == drv or self.casefold(drv2) == self.casefold(drv):
-                # Same drive => second path is relative to the first
-                return drv, root, parts + parts2[1:]
-        else:
-            # Second path is non-anchored (common case)
-            return drv, root, parts + parts2
-        return drv2, root2, parts2
-
-
-class _WindowsFlavour(_Flavour):
-    # Reference for Windows paths can be found at
-    # http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
-
-    sep = '\\'
-    altsep = '/'
-    has_drv = True
-    pathmod = ntpath
-
-    is_supported = (os.name == 'nt')
-
-    drive_letters = set('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ')
-    ext_namespace_prefix = '\\\\?\\'
-
-    reserved_names = (
-        {'CON', 'PRN', 'AUX', 'NUL', 'CONIN$', 'CONOUT$'} |
-        {'COM%s' % c for c in '123456789\xb9\xb2\xb3'} |
-        {'LPT%s' % c for c in '123456789\xb9\xb2\xb3'}
-        )
-
-    # Interesting findings about extended paths:
-    # * '\\?\c:\a' is an extended path, which bypasses normal Windows API
-    #   path processing. Thus relative paths are not resolved and slash is not
-    #   translated to backslash. It has the native NT path limit of 32767
-    #   characters, but a bit less after resolving device symbolic links,
-    #   such as '\??\C:' => '\Device\HarddiskVolume2'.
-    # * '\\?\c:/a' looks for a device named 'C:/a' because slash is a
-    #   regular name character in the object namespace.
-    # * '\\?\c:\foo/bar' is invalid because '/' is illegal in NT filesystems.
-    #   The only path separator at the filesystem level is backslash.
-    # * '//?/c:\a' and '//?/c:/a' are effectively equivalent to '\\.\c:\a' and
-    #   thus limited to MAX_PATH.
-    # * Prior to Windows 8, ANSI API bytes paths are limited to MAX_PATH,
-    #   even with the '\\?\' prefix.
-
-    def splitroot(self, part, sep=sep):
-        first = part[0:1]
-        second = part[1:2]
-        if (second == sep and first == sep):
-            # XXX extended paths should also disable the collapsing of "."
-            # components (according to MSDN docs).
-            prefix, part = self._split_extended_path(part)
-            first = part[0:1]
-            second = part[1:2]
-        else:
-            prefix = ''
-        third = part[2:3]
-        if (second == sep and first == sep and third != sep):
-            # is a UNC path:
-            # vvvvvvvvvvvvvvvvvvvvv root
-            # \\machine\mountpoint\directory\etc\...
-            #            directory ^^^^^^^^^^^^^^
-            index = part.find(sep, 2)
-            if index != -1:
-                index2 = part.find(sep, index + 1)
-                # a UNC path can't have two slashes in a row
-                # (after the initial two)
-                if index2 != index + 1:
-                    if index2 == -1:
-                        index2 = len(part)
-                    if prefix:
-                        return prefix + part[1:index2], sep, part[index2+1:]
-                    else:
-                        return part[:index2], sep, part[index2+1:]
-        drv = root = ''
-        if second == ':' and first in self.drive_letters:
-            drv = part[:2]
-            part = part[2:]
-            first = third
-        if first == sep:
-            root = first
-            part = part.lstrip(sep)
-        return prefix + drv, root, part
-
-    def casefold(self, s):
-        return s.lower()
-
-    def casefold_parts(self, parts):
-        return [p.lower() for p in parts]
-
-    def compile_pattern(self, pattern):
-        return re.compile(fnmatch.translate(pattern), re.IGNORECASE).fullmatch
-
-    def _split_extended_path(self, s, ext_prefix=ext_namespace_prefix):
-        prefix = ''
-        if s.startswith(ext_prefix):
-            prefix = s[:4]
-            s = s[4:]
-            if s.startswith('UNC\\'):
-                prefix += s[:3]
-                s = '\\' + s[3:]
-        return prefix, s
-
-    def is_reserved(self, parts):
-        # NOTE: the rules for reserved names seem somewhat complicated
-        # (e.g. r"..\NUL" is reserved but not r"foo\NUL" if "foo" does not
-        # exist). We err on the side of caution and return True for paths
-        # which are not considered reserved by Windows.
-        if not parts:
-            return False
-        if parts[0].startswith('\\\\'):
-            # UNC paths are never reserved
-            return False
-        name = parts[-1].partition('.')[0].partition(':')[0].rstrip(' ')
-        return name.upper() in self.reserved_names
 
-    def make_uri(self, path):
-        # Under Windows, file URIs use the UTF-8 encoding.
-        drive = path.drive
-        if len(drive) == 2 and drive[1] == ':':
-            # It's a path on a local drive => 'file:///c:/a/b'
-            rest = path.as_posix()[2:].lstrip('/')
-            return 'file:///%s/%s' % (
-                drive, urlquote_from_bytes(rest.encode('utf-8')))
+@functools.lru_cache()
+def _make_selector(pattern_parts, flavour, case_sensitive):
+    pat = pattern_parts[0]
+    if not pat:
+        return _TerminatingSelector()
+    if pat == '**':
+        child_parts_idx = 1
+        while child_parts_idx < len(pattern_parts) and pattern_parts[child_parts_idx] == '**':
+            child_parts_idx += 1
+        child_parts = pattern_parts[child_parts_idx:]
+        if '**' in child_parts:
+            cls = _DoubleRecursiveWildcardSelector
         else:
-            # It's a path on a network drive => 'file://host/share/a/b'
-            return 'file:' + urlquote_from_bytes(path.as_posix().encode('utf-8'))
-
-
-class _PosixFlavour(_Flavour):
-    sep = '/'
-    altsep = ''
-    has_drv = False
-    pathmod = posixpath
-
-    is_supported = (os.name != 'nt')
-
-    def splitroot(self, part, sep=sep):
-        if part and part[0] == sep:
-            stripped_part = part.lstrip(sep)
-            # According to POSIX path resolution:
-            # http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap04.html#tag_04_11
-            # "A pathname that begins with two successive slashes may be
-            # interpreted in an implementation-defined manner, although more
-            # than two leading slashes shall be treated as a single slash".
-            if len(part) - len(stripped_part) == 2:
-                return '', sep * 2, stripped_part
-            else:
-                return '', sep, stripped_part
+            cls = _RecursiveWildcardSelector
+    else:
+        child_parts = pattern_parts[1:]
+        if pat == '..':
+            cls = _ParentSelector
+        elif '**' in pat:
+            raise ValueError("Invalid pattern: '**' can only be an entire path component")
         else:
-            return '', '', part
-
-    def casefold(self, s):
-        return s
+            cls = _WildcardSelector
+    return cls(pat, child_parts, flavour, case_sensitive)
 
-    def casefold_parts(self, parts):
-        return parts
 
-    def compile_pattern(self, pattern):
-        return re.compile(fnmatch.translate(pattern)).fullmatch
+@functools.lru_cache(maxsize=256)
+def _compile_pattern(pat, case_sensitive):
+    flags = re.NOFLAG if case_sensitive else re.IGNORECASE
+    return re.compile(fnmatch.translate(pat), flags).match
 
-    def is_reserved(self, parts):
-        return False
 
-    def make_uri(self, path):
-        # We represent the path using the local filesystem encoding,
-        # for portability to other applications.
-        bpath = bytes(path)
-        return 'file://' + urlquote_from_bytes(bpath)
+@functools.lru_cache()
+def _compile_pattern_lines(pattern_lines, case_sensitive):
+    """Compile the given pattern lines to an `re.Pattern` object.
 
+    The *pattern_lines* argument is a glob-style pattern (e.g. '*/*.py') with
+    its path separators and newlines swapped (e.g. '*\n*.py`). By using
+    newlines to separate path components, and not setting `re.DOTALL`, we
+    ensure that the `*` wildcard cannot match path separators.
 
-_windows_flavour = _WindowsFlavour()
-_posix_flavour = _PosixFlavour()
-
-
-#
-# Globbing helpers
-#
-
-def _make_selector(pattern_parts, flavour):
-    pat = pattern_parts[0]
-    child_parts = pattern_parts[1:]
-    if not pat:
-        return _TerminatingSelector()
-    if pat == '**':
-        cls = _RecursiveWildcardSelector
-    elif '**' in pat:
-        raise ValueError("Invalid pattern: '**' can only be an entire path component")
-    elif _is_wildcard_pattern(pat):
-        cls = _WildcardSelector
-    else:
-        cls = _PreciseSelector
-    return cls(pat, child_parts, flavour)
+    The returned `re.Pattern` object may have its `match()` method called to
+    match a complete pattern, or `search()` to match from the right. The
+    argument supplied to these methods must also have its path separators and
+    newlines swapped.
+    """
 
-if hasattr(functools, "lru_cache"):
-    _make_selector = functools.lru_cache()(_make_selector)
+    # Match the start of the path, or just after a path separator
+    parts = ['^']
+    for part in pattern_lines.splitlines(keepends=True):
+        if part == '*\n':
+            part = r'.+\n'
+        elif part == '*':
+            part = r'.+'
+        else:
+            # Any other component: pass to fnmatch.translate(). We slice off
+            # the common prefix and suffix added by translate() to ensure that
+            # re.DOTALL is not set, and the end of the string not matched,
+            # respectively. With DOTALL not set, '*' wildcards will not match
+            # path separators, because the '.' characters in the pattern will
+            # not match newlines.
+            part = fnmatch.translate(part)[_FNMATCH_SLICE]
+        parts.append(part)
+    # Match the end of the path, always.
+    parts.append(r'\Z')
+    flags = re.MULTILINE
+    if not case_sensitive:
+        flags |= re.IGNORECASE
+    return re.compile(''.join(parts), flags=flags)
 
 
 class _Selector:
     """A selector matches a specific glob pattern part against the children
     of a given path."""
 
-    def __init__(self, child_parts, flavour):
+    def __init__(self, child_parts, flavour, case_sensitive):
         self.child_parts = child_parts
         if child_parts:
-            self.successor = _make_selector(child_parts, flavour)
+            self.successor = _make_selector(child_parts, flavour, case_sensitive)
             self.dironly = True
         else:
             self.successor = _TerminatingSelector()
@@ -314,105 +165,95 @@ class _Selector:
         """Iterate over all child paths of `parent_path` matched by this
         selector.  This can contain parent_path itself."""
         path_cls = type(parent_path)
-        is_dir = path_cls.is_dir
-        exists = path_cls.exists
         scandir = path_cls._scandir
-        if not is_dir(parent_path):
+        if not parent_path.is_dir():
             return iter([])
-        return self._select_from(parent_path, is_dir, exists, scandir)
+        return self._select_from(parent_path, scandir)
 
 
 class _TerminatingSelector:
 
-    def _select_from(self, parent_path, is_dir, exists, scandir):
+    def _select_from(self, parent_path, scandir):
         yield parent_path
 
 
-class _PreciseSelector(_Selector):
+class _ParentSelector(_Selector):
 
-    def __init__(self, name, child_parts, flavour):
-        self.name = name
-        _Selector.__init__(self, child_parts, flavour)
+    def __init__(self, name, child_parts, flavour, case_sensitive):
+        _Selector.__init__(self, child_parts, flavour, case_sensitive)
 
-    def _select_from(self, parent_path, is_dir, exists, scandir):
-        try:
-            path = parent_path._make_child_relpath(self.name)
-            if (is_dir if self.dironly else exists)(path):
-                for p in self.successor._select_from(path, is_dir, exists, scandir):
-                    yield p
-        except PermissionError:
-            return
+    def _select_from(self,  parent_path, scandir):
+        path = parent_path._make_child_relpath('..')
+        for p in self.successor._select_from(path, scandir):
+            yield p
 
 
 class _WildcardSelector(_Selector):
 
-    def __init__(self, pat, child_parts, flavour):
-        self.match = flavour.compile_pattern(pat)
-        _Selector.__init__(self, child_parts, flavour)
+    def __init__(self, pat, child_parts, flavour, case_sensitive):
+        _Selector.__init__(self, child_parts, flavour, case_sensitive)
+        if case_sensitive is None:
+            # TODO: evaluate case-sensitivity of each directory in _select_from()
+            case_sensitive = _is_case_sensitive(flavour)
+        self.match = _compile_pattern(pat, case_sensitive)
 
-    def _select_from(self, parent_path, is_dir, exists, scandir):
+    def _select_from(self, parent_path, scandir):
         try:
+            # We must close the scandir() object before proceeding to
+            # avoid exhausting file descriptors when globbing deep trees.
             with scandir(parent_path) as scandir_it:
                 entries = list(scandir_it)
+        except OSError:
+            pass
+        else:
             for entry in entries:
                 if self.dironly:
                     try:
-                        # "entry.is_dir()" can raise PermissionError
-                        # in some cases (see bpo-38894), which is not
-                        # among the errors ignored by _ignore_error()
                         if not entry.is_dir():
                             continue
-                    except OSError as e:
-                        if not _ignore_error(e):
-                            raise
+                    except OSError:
                         continue
                 name = entry.name
                 if self.match(name):
                     path = parent_path._make_child_relpath(name)
-                    for p in self.successor._select_from(path, is_dir, exists, scandir):
+                    for p in self.successor._select_from(path, scandir):
                         yield p
-        except PermissionError:
-            return
 
 
 class _RecursiveWildcardSelector(_Selector):
 
-    def __init__(self, pat, child_parts, flavour):
-        _Selector.__init__(self, child_parts, flavour)
+    def __init__(self, pat, child_parts, flavour, case_sensitive):
+        _Selector.__init__(self, child_parts, flavour, case_sensitive)
 
-    def _iterate_directories(self, parent_path, is_dir, scandir):
+    def _iterate_directories(self, parent_path):
         yield parent_path
-        try:
-            with scandir(parent_path) as scandir_it:
-                entries = list(scandir_it)
-            for entry in entries:
-                entry_is_dir = False
-                try:
-                    entry_is_dir = entry.is_dir(follow_symlinks=False)
-                except OSError as e:
-                    if not _ignore_error(e):
-                        raise
-                if entry_is_dir:
-                    path = parent_path._make_child_relpath(entry.name)
-                    for p in self._iterate_directories(path, is_dir, scandir):
-                        yield p
-        except PermissionError:
-            return
+        for dirpath, dirnames, _ in parent_path.walk():
+            for dirname in dirnames:
+                yield dirpath._make_child_relpath(dirname)
+
+    def _select_from(self, parent_path, scandir):
+        successor_select = self.successor._select_from
+        for starting_point in self._iterate_directories(parent_path):
+            for p in successor_select(starting_point, scandir):
+                yield p
+
+
+class _DoubleRecursiveWildcardSelector(_RecursiveWildcardSelector):
+    """
+    Like _RecursiveWildcardSelector, but also de-duplicates results from
+    successive selectors. This is necessary if the pattern contains
+    multiple non-adjacent '**' segments.
+    """
 
-    def _select_from(self, parent_path, is_dir, exists, scandir):
+    def _select_from(self, parent_path, scandir):
+        yielded = set()
         try:
-            yielded = set()
-            try:
-                successor_select = self.successor._select_from
-                for starting_point in self._iterate_directories(parent_path, is_dir, scandir):
-                    for p in successor_select(starting_point, is_dir, exists, scandir):
-                        if p not in yielded:
-                            yield p
-                            yielded.add(p)
-            finally:
-                yielded.clear()
-        except PermissionError:
-            return
+            for p in super()._select_from(parent_path, scandir):
+                if p not in yielded:
+                    yield p
+                    yielded.add(p)
+        finally:
+            yielded.clear()
 
 
 #
@@ -422,20 +263,16 @@ class _RecursiveWildcardSelector(_Selector):
 class _PathParents(Sequence):
     """This object provides sequence-like access to the logical ancestors
     of a path.  Don't try to construct it yourself."""
-    __slots__ = ('_pathcls', '_drv', '_root', '_parts')
+    __slots__ = ('_path', '_drv', '_root', '_tail')
 
     def __init__(self, path):
-        # We don't store the instance to avoid reference cycles
-        self._pathcls = type(path)
-        self._drv = path._drv
-        self._root = path._root
-        self._parts = path._parts
+        self._path = path
+        self._drv = path.drive
+        self._root = path.root
+        self._tail = path._tail
 
     def __len__(self):
-        if self._drv or self._root:
-            return len(self._parts) - 1
-        else:
-            return len(self._parts)
+        return len(self._tail)
 
     def __getitem__(self, idx):
         if isinstance(idx, slice):
@@ -445,11 +282,11 @@ class _PathParents(Sequence):
             raise IndexError(idx)
         if idx < 0:
             idx += len(self)
-        return self._pathcls._from_parsed_parts(self._drv, self._root,
-                                                self._parts[:-idx - 1])
+        return self._path._from_parsed_parts(self._drv, self._root,
+                                             self._tail[:-idx - 1])
 
     def __repr__(self):
-        return "<{}.parents>".format(self._pathcls.__name__)
+        return "<{}.parents>".format(type(self._path).__name__)
 
 
 class PurePath(object):
@@ -461,12 +298,49 @@ class PurePath(object):
     PureWindowsPath object.  You can also instantiate either of these classes
     directly, regardless of your system.
     """
+
     __slots__ = (
-        '_drv', '_root', '_parts',
-        '_str', '_hash', '_pparts', '_cached_cparts',
+        # The `_raw_paths` slot stores unnormalized string paths. This is set
+        # in the `__init__()` method.
+        '_raw_paths',
+
+        # The `_drv`, `_root` and `_tail_cached` slots store parsed and
+        # normalized parts of the path. They are set when any of the `drive`,
+        # `root` or `_tail` properties are accessed for the first time. The
+        # three-part division corresponds to the result of
+        # `os.path.splitroot()`, except that the tail is further split on path
+        # separators (i.e. it is a list of strings), and that the root and
+        # tail are normalized.
+        '_drv', '_root', '_tail_cached',
+
+        # The `_str` slot stores the string representation of the path,
+        # computed from the drive, root and tail when `__str__()` is called
+        # for the first time. It's used to implement `_str_normcase`
+        '_str',
+
+        # The `_str_normcase_cached` slot stores the string path with
+        # normalized case. It is set when the `_str_normcase` property is
+        # accessed for the first time. It's used to implement `__eq__()`
+        # `__hash__()`, and `_parts_normcase`
+        '_str_normcase_cached',
+
+        # The `_parts_normcase_cached` slot stores the case-normalized
+        # string path after splitting on path separators. It's set when the
+        # `_parts_normcase` property is accessed for the first time. It's used
+        # to implement comparison methods like `__lt__()`.
+        '_parts_normcase_cached',
+
+        # The `_lines_cached` slot stores the string path with path separators
+        # and newlines swapped. This is used to implement `match()`.
+        '_lines_cached',
+
+        # The `_hash` slot stores the hash of the case-normalized string
+        # path. It's set when `__hash__()` is called for the first time.
+        '_hash',
     )
+    _flavour = os.path
 
-    def __new__(cls, *args):
+    def __new__(cls, *args, **kwargs):
         """Construct a PurePath from one or several strings and or existing
         PurePath objects.  The strings and path objects are combined so as
         to yield a canonicalized path, which is incorporated into the
@@ -474,64 +348,91 @@ class PurePath(object):
         """
         if cls is PurePath:
             cls = PureWindowsPath if os.name == 'nt' else PurePosixPath
-        return cls._from_parts(args)
+        return object.__new__(cls)
 
     def __reduce__(self):
         # Using the parts tuple helps share interned path parts
         # when pickling related paths.
-        return (self.__class__, tuple(self._parts))
-
-    @classmethod
-    def _parse_args(cls, args):
-        # This is useful when you don't want to create an instance, just
-        # canonicalize some constructor arguments.
-        parts = []
-        for a in args:
-            if isinstance(a, PurePath):
-                parts += a._parts
-            else:
-                a = os.fspath(a)
-                if isinstance(a, str):
-                    # Force-cast str subclasses to str (issue #21127)
-                    parts.append(str(a))
+        return (self.__class__, self.parts)
+
+    def __init__(self, *args):
+        paths = []
+        for arg in args:
+            if isinstance(arg, PurePath):
+                if arg._flavour is ntpath and self._flavour is posixpath:
+                    # GH-103631: Convert separators for backwards compatibility.
+                    paths.extend(path.replace('\\', '/') for path in arg._raw_paths)
                 else:
+                    paths.extend(arg._raw_paths)
+            else:
+                try:
+                    path = os.fspath(arg)
+                except TypeError:
+                    path = arg
+                if not isinstance(path, str):
                     raise TypeError(
-                        "argument should be a str object or an os.PathLike "
-                        "object returning str, not %r"
-                        % type(a))
-        return cls._flavour.parse_parts(parts)
+                        "argument should be a str or an os.PathLike "
+                        "object where __fspath__ returns a str, "
+                        f"not {type(path).__name__!r}")
+                paths.append(path)
+        self._raw_paths = paths
 
-    @classmethod
-    def _from_parts(cls, args):
-        # We need to call _parse_args on the instance, so as to get the
-        # right flavour.
-        self = object.__new__(cls)
-        drv, root, parts = self._parse_args(args)
-        self._drv = drv
-        self._root = root
-        self._parts = parts
-        return self
+    def with_segments(self, *pathsegments):
+        """Construct a new path object from any number of path-like objects.
+        Subclasses may override this method to customize how new path objects
+        are created from methods like `iterdir()`.
+        """
+        return type(self)(*pathsegments)
 
     @classmethod
-    def _from_parsed_parts(cls, drv, root, parts):
-        self = object.__new__(cls)
+    def _parse_path(cls, path):
+        if not path:
+            return '', '', []
+        sep = cls._flavour.sep
+        altsep = cls._flavour.altsep
+        if altsep:
+            path = path.replace(altsep, sep)
+        drv, root, rel = cls._flavour.splitroot(path)
+        if not root and drv.startswith(sep) and not drv.endswith(sep):
+            drv_parts = drv.split(sep)
+            if len(drv_parts) == 4 and drv_parts[2] not in '?.':
+                # e.g. //server/share
+                root = sep
+            elif len(drv_parts) == 6:
+                # e.g. //?/unc/server/share
+                root = sep
+        parsed = [sys.intern(str(x)) for x in rel.split(sep) if x and x != '.']
+        return drv, root, parsed
+
+    def _load_parts(self):
+        paths = self._raw_paths
+        if len(paths) == 0:
+            path = ''
+        elif len(paths) == 1:
+            path = paths[0]
+        else:
+            path = self._flavour.join(*paths)
+        drv, root, tail = self._parse_path(path)
         self._drv = drv
         self._root = root
-        self._parts = parts
-        return self
+        self._tail_cached = tail
+
+    def _from_parsed_parts(self, drv, root, tail):
+        path_str = self._format_parsed_parts(drv, root, tail)
+        path = self.with_segments(path_str)
+        path._str = path_str or '.'
+        path._drv = drv
+        path._root = root
+        path._tail_cached = tail
+        return path
 
     @classmethod
-    def _format_parsed_parts(cls, drv, root, parts):
+    def _format_parsed_parts(cls, drv, root, tail):
         if drv or root:
-            return drv + root + cls._flavour.join(parts[1:])
-        else:
-            return cls._flavour.join(parts)
-
-    def _make_child(self, args):
-        drv, root, parts = self._parse_args(args)
-        drv, root, parts = self._flavour.join_parsed_parts(
-            self._drv, self._root, self._parts, drv, root, parts)
-        return self._from_parsed_parts(drv, root, parts)
+            return drv + root + cls._flavour.sep.join(tail)
+        elif tail and cls._flavour.splitdrive(tail[0])[0]:
+            tail = ['.'] + tail
+        return cls._flavour.sep.join(tail)
 
     def __str__(self):
         """Return the string representation of the path, suitable for
@@ -539,8 +440,8 @@ class PurePath(object):
         try:
             return self._str
         except AttributeError:
-            self._str = self._format_parsed_parts(self._drv, self._root,
-                                                  self._parts) or '.'
+            self._str = self._format_parsed_parts(self.drive, self.root,
+                                                  self._tail) or '.'
             return self._str
 
     def __fspath__(self):
@@ -564,68 +465,128 @@ class PurePath(object):
         """Return the path as a 'file' URI."""
         if not self.is_absolute():
             raise ValueError("relative path can't be expressed as a file URI")
-        return self._flavour.make_uri(self)
+
+        drive = self.drive
+        if len(drive) == 2 and drive[1] == ':':
+            # It's a path on a local drive => 'file:///c:/a/b'
+            prefix = 'file:///' + drive
+            path = self.as_posix()[2:]
+        elif drive:
+            # It's a path on a network drive => 'file://host/share/a/b'
+            prefix = 'file:'
+            path = self.as_posix()
+        else:
+            # It's a posix path => 'file:///etc/hosts'
+            prefix = 'file://'
+            path = str(self)
+        return prefix + urlquote_from_bytes(os.fsencode(path))
+
+    @property
+    def _str_normcase(self):
+        # String with normalized case, for hashing and equality checks
+        try:
+            return self._str_normcase_cached
+        except AttributeError:
+            if _is_case_sensitive(self._flavour):
+                self._str_normcase_cached = str(self)
+            else:
+                self._str_normcase_cached = str(self).lower()
+            return self._str_normcase_cached
 
     @property
-    def _cparts(self):
-        # Cached casefolded parts, for hashing and comparison
+    def _parts_normcase(self):
+        # Cached parts with normalized case, for comparisons.
         try:
-            return self._cached_cparts
+            return self._parts_normcase_cached
         except AttributeError:
-            self._cached_cparts = self._flavour.casefold_parts(self._parts)
-            return self._cached_cparts
+            self._parts_normcase_cached = self._str_normcase.split(self._flavour.sep)
+            return self._parts_normcase_cached
+
+    @property
+    def _lines(self):
+        # Path with separators and newlines swapped, for pattern matching.
+        try:
+            return self._lines_cached
+        except AttributeError:
+            path_str = str(self)
+            if path_str == '.':
+                self._lines_cached = ''
+            else:
+                trans = _SWAP_SEP_AND_NEWLINE[self._flavour.sep]
+                self._lines_cached = path_str.translate(trans)
+            return self._lines_cached
 
     def __eq__(self, other):
         if not isinstance(other, PurePath):
             return NotImplemented
-        return self._cparts == other._cparts and self._flavour is other._flavour
+        return self._str_normcase == other._str_normcase and self._flavour is other._flavour
 
     def __hash__(self):
         try:
             return self._hash
         except AttributeError:
-            self._hash = hash(tuple(self._cparts))
+            self._hash = hash(self._str_normcase)
             return self._hash
 
     def __lt__(self, other):
         if not isinstance(other, PurePath) or self._flavour is not other._flavour:
             return NotImplemented
-        return self._cparts < other._cparts
+        return self._parts_normcase < other._parts_normcase
 
     def __le__(self, other):
         if not isinstance(other, PurePath) or self._flavour is not other._flavour:
             return NotImplemented
-        return self._cparts <= other._cparts
+        return self._parts_normcase <= other._parts_normcase
 
     def __gt__(self, other):
         if not isinstance(other, PurePath) or self._flavour is not other._flavour:
             return NotImplemented
-        return self._cparts > other._cparts
+        return self._parts_normcase > other._parts_normcase
 
     def __ge__(self, other):
         if not isinstance(other, PurePath) or self._flavour is not other._flavour:
             return NotImplemented
-        return self._cparts >= other._cparts
+        return self._parts_normcase >= other._parts_normcase
 
-    drive = property(attrgetter('_drv'),
-                     doc="""The drive prefix (letter or UNC path), if any.""")
+    @property
+    def drive(self):
+        """The drive prefix (letter or UNC path), if any."""
+        try:
+            return self._drv
+        except AttributeError:
+            self._load_parts()
+            return self._drv
 
-    root = property(attrgetter('_root'),
-                    doc="""The root of the path, if any.""")
+    @property
+    def root(self):
+        """The root of the path, if any."""
+        try:
+            return self._root
+        except AttributeError:
+            self._load_parts()
+            return self._root
+
+    @property
+    def _tail(self):
+        try:
+            return self._tail_cached
+        except AttributeError:
+            self._load_parts()
+            return self._tail_cached
 
     @property
     def anchor(self):
         """The concatenation of the drive and root, or ''."""
-        anchor = self._drv + self._root
+        anchor = self.drive + self.root
         return anchor
 
     @property
     def name(self):
         """The final path component, if any."""
-        parts = self._parts
-        if len(parts) == (1 if (self._drv or self._root) else 0):
+        tail = self._tail
+        if not tail:
             return ''
-        return parts[-1]
+        return tail[-1]
 
     @property
     def suffix(self):
@@ -668,12 +629,11 @@ class PurePath(object):
         """Return a new path with the file name changed."""
         if not self.name:
             raise ValueError("%r has an empty name" % (self,))
-        drv, root, parts = self._flavour.parse_parts((name,))
-        if (not name or name[-1] in [self._flavour.sep, self._flavour.altsep]
-            or drv or root or len(parts) != 1):
+        f = self._flavour
+        if not name or f.sep in name or (f.altsep and f.altsep in name) or name == '.':
             raise ValueError("Invalid name %r" % (name))
-        return self._from_parsed_parts(self._drv, self._root,
-                                       self._parts[:-1] + [name])
+        return self._from_parsed_parts(self.drive, self.root,
+                                       self._tail[:-1] + [name])
 
     def with_stem(self, stem):
         """Return a new path with the stem changed."""
@@ -697,137 +657,144 @@ class PurePath(object):
             name = name + suffix
         else:
             name = name[:-len(old_suffix)] + suffix
-        return self._from_parsed_parts(self._drv, self._root,
-                                       self._parts[:-1] + [name])
+        return self._from_parsed_parts(self.drive, self.root,
+                                       self._tail[:-1] + [name])
 
-    def relative_to(self, *other):
+    def relative_to(self, other, /, *_deprecated, walk_up=False):
         """Return the relative path to another path identified by the passed
         arguments.  If the operation is not possible (because this is not
-        a subpath of the other path), raise ValueError.
-        """
-        # For the purpose of this method, drive and root are considered
-        # separate parts, i.e.:
-        #   Path('c:/').relative_to('c:')  gives Path('/')
-        #   Path('c:/').relative_to('/')   raise ValueError
-        if not other:
-            raise TypeError("need at least one argument")
-        parts = self._parts
-        drv = self._drv
-        root = self._root
-        if root:
-            abs_parts = [drv, root] + parts[1:]
-        else:
-            abs_parts = parts
-        to_drv, to_root, to_parts = self._parse_args(other)
-        if to_root:
-            to_abs_parts = [to_drv, to_root] + to_parts[1:]
+        related to the other path), raise ValueError.
+
+        The *walk_up* parameter controls whether `..` may be used to resolve
+        the path.
+        """
+        if _deprecated:
+            msg = ("support for supplying more than one positional argument "
+                   "to pathlib.PurePath.relative_to() is deprecated and "
+                   "scheduled for removal in Python {remove}")
+            warnings._deprecated("pathlib.PurePath.relative_to(*args)", msg,
+                                 remove=(3, 14))
+        other = self.with_segments(other, *_deprecated)
+        for step, path in enumerate([other] + list(other.parents)):
+            if self.is_relative_to(path):
+                break
+            elif not walk_up:
+                raise ValueError(f"{str(self)!r} is not in the subpath of {str(other)!r}")
+            elif path.name == '..':
+                raise ValueError(f"'..' segment in {str(other)!r} cannot be walked")
         else:
-            to_abs_parts = to_parts
-        n = len(to_abs_parts)
-        cf = self._flavour.casefold_parts
-        if (root or drv) if n == 0 else cf(abs_parts[:n]) != cf(to_abs_parts):
-            formatted = self._format_parsed_parts(to_drv, to_root, to_parts)
-            raise ValueError("{!r} is not in the subpath of {!r}"
-                    " OR one path is relative and the other is absolute."
-                             .format(str(self), str(formatted)))
-        return self._from_parsed_parts('', root if n == 1 else '',
-                                       abs_parts[n:])
-
-    def is_relative_to(self, *other):
+            raise ValueError(f"{str(self)!r} and {str(other)!r} have different anchors")
+        parts = ['..'] * step + self._tail[len(path._tail):]
+        return self.with_segments(*parts)
+
+    def is_relative_to(self, other, /, *_deprecated):
         """Return True if the path is relative to another path or False.
         """
-        try:
-            self.relative_to(*other)
-            return True
-        except ValueError:
-            return False
+        if _deprecated:
+            msg = ("support for supplying more than one argument to "
+                   "pathlib.PurePath.is_relative_to() is deprecated and "
+                   "scheduled for removal in Python {remove}")
+            warnings._deprecated("pathlib.PurePath.is_relative_to(*args)",
+                                 msg, remove=(3, 14))
+        other = self.with_segments(other, *_deprecated)
+        return other == self or other in self.parents
 
     @property
     def parts(self):
         """An object providing sequence-like access to the
         components in the filesystem path."""
-        # We cache the tuple to avoid building a new one each time .parts
-        # is accessed.  XXX is this necessary?
-        try:
-            return self._pparts
-        except AttributeError:
-            self._pparts = tuple(self._parts)
-            return self._pparts
+        if self.drive or self.root:
+            return (self.drive + self.root,) + tuple(self._tail)
+        else:
+            return tuple(self._tail)
 
-    def joinpath(self, *args):
+    def joinpath(self, *pathsegments):
         """Combine this path with one or several arguments, and return a
         new path representing either a subpath (if all arguments are relative
         paths) or a totally different path (if one of the arguments is
         anchored).
         """
-        return self._make_child(args)
+        return self.with_segments(self, *pathsegments)
 
     def __truediv__(self, key):
         try:
-            return self._make_child((key,))
+            return self.joinpath(key)
         except TypeError:
             return NotImplemented
 
     def __rtruediv__(self, key):
         try:
-            return self._from_parts([key] + self._parts)
+            return self.with_segments(key, self)
         except TypeError:
             return NotImplemented
 
     @property
     def parent(self):
         """The logical parent of the path."""
-        drv = self._drv
-        root = self._root
-        parts = self._parts
-        if len(parts) == 1 and (drv or root):
+        drv = self.drive
+        root = self.root
+        tail = self._tail
+        if not tail:
             return self
-        return self._from_parsed_parts(drv, root, parts[:-1])
+        return self._from_parsed_parts(drv, root, tail[:-1])
 
     @property
     def parents(self):
         """A sequence of this path's logical parents."""
+        # The value of this property should not be cached on the path object,
+        # as doing so would introduce a reference cycle.
         return _PathParents(self)
 
     def is_absolute(self):
         """True if the path is absolute (has both a root and, if applicable,
         a drive)."""
-        if not self._root:
+        if self._flavour is ntpath:
+            # ntpath.isabs() is defective - see GH-44626.
+            return bool(self.drive and self.root)
+        elif self._flavour is posixpath:
+            # Optimization: work with raw paths on POSIX.
+            for path in self._raw_paths:
+                if path.startswith('/'):
+                    return True
             return False
-        return not self._flavour.has_drv or bool(self._drv)
+        else:
+            return self._flavour.isabs(str(self))
 
     def is_reserved(self):
         """Return True if the path contains one of the special names reserved
         by the system, if any."""
-        return self._flavour.is_reserved(self._parts)
+        if self._flavour is posixpath or not self._tail:
+            return False
 
-    def match(self, path_pattern):
+        # NOTE: the rules for reserved names seem somewhat complicated
+        # (e.g. r"..\NUL" is reserved but not r"foo\NUL" if "foo" does not
+        # exist). We err on the side of caution and return True for paths
+        # which are not considered reserved by Windows.
+        if self.drive.startswith('\\\\'):
+            # UNC paths are never reserved.
+            return False
+        name = self._tail[-1].partition('.')[0].partition(':')[0].rstrip(' ')
+        return name.upper() in _WIN_RESERVED_NAMES
+
+    def match(self, path_pattern, *, case_sensitive=None):
         """
         Return True if this path matches the given pattern.
         """
-        cf = self._flavour.casefold
-        path_pattern = cf(path_pattern)
-        drv, root, pat_parts = self._flavour.parse_parts((path_pattern,))
-        if not pat_parts:
+        if not isinstance(path_pattern, PurePath):
+            path_pattern = self.with_segments(path_pattern)
+        if case_sensitive is None:
+            case_sensitive = _is_case_sensitive(self._flavour)
+        pattern = _compile_pattern_lines(path_pattern._lines, case_sensitive)
+        if path_pattern.drive or path_pattern.root:
+            return pattern.match(self._lines) is not None
+        elif path_pattern._tail:
+            return pattern.search(self._lines) is not None
+        else:
             raise ValueError("empty pattern")
-        if drv and drv != cf(self._drv):
-            return False
-        if root and root != cf(self._root):
-            return False
-        parts = self._cparts
-        if drv or root:
-            if len(pat_parts) != len(parts):
-                return False
-            pat_parts = pat_parts[1:]
-        elif len(pat_parts) > len(parts):
-            return False
-        for part, pat in zip(reversed(parts), reversed(pat_parts)):
-            if not fnmatch.fnmatchcase(part, pat):
-                return False
-        return True
+
 
 # Can't subclass os.PathLike from PurePath and keep the constructor
-# optimizations in PurePath._parse_args().
+# optimizations in PurePath.__slots__.
 os.PathLike.register(PurePath)
 
 
@@ -837,7 +804,7 @@ class PurePosixPath(PurePath):
     On a POSIX system, instantiating a PurePath should return this object.
     However, you can also instantiate it directly on any system.
     """
-    _flavour = _posix_flavour
+    _flavour = posixpath
     __slots__ = ()
 
 
@@ -847,7 +814,7 @@ class PureWindowsPath(PurePath):
     On a Windows system, instantiating a PurePath should return this object.
     However, you can also instantiate it directly on any system.
     """
-    _flavour = _windows_flavour
+    _flavour = ntpath
     __slots__ = ()
 
 
@@ -865,53 +832,164 @@ class Path(PurePath):
     """
     __slots__ = ()
 
-    def __new__(cls, *args, **kwargs):
-        if cls is Path:
-            cls = WindowsPath if os.name == 'nt' else PosixPath
-        self = cls._from_parts(args)
-        if not self._flavour.is_supported:
-            raise NotImplementedError("cannot instantiate %r on your system"
-                                      % (cls.__name__,))
-        return self
+    def stat(self, *, follow_symlinks=True):
+        """
+        Return the result of the stat() system call on this path, like
+        os.stat() does.
+        """
+        return os.stat(self, follow_symlinks=follow_symlinks)
 
-    def _make_child_relpath(self, part):
-        # This is an optimization used for dir walking.  `part` must be
-        # a single part relative to this path.
-        parts = self._parts + [part]
-        return self._from_parsed_parts(self._drv, self._root, parts)
+    def lstat(self):
+        """
+        Like stat(), except if the path points to a symlink, the symlink's
+        status information is returned, rather than its target's.
+        """
+        return self.stat(follow_symlinks=False)
 
-    def __enter__(self):
-        # In previous versions of pathlib, __exit__() marked this path as
-        # closed; subsequent attempts to perform I/O would raise an IOError.
-        # This functionality was never documented, and had the effect of
-        # making Path objects mutable, contrary to PEP 428.
-        # In Python 3.9 __exit__() was made a no-op.
-        # In Python 3.11 __enter__() began emitting DeprecationWarning.
-        # In Python 3.13 __enter__() and __exit__() should be removed.
-        warnings.warn("pathlib.Path.__enter__() is deprecated and scheduled "
-                      "for removal in Python 3.13; Path objects as a context "
-                      "manager is a no-op",
-                      DeprecationWarning, stacklevel=2)
-        return self
 
-    def __exit__(self, t, v, tb):
-        pass
+    # Convenience functions for querying the stat results
 
-    # Public API
+    def exists(self, *, follow_symlinks=True):
+        """
+        Whether this path exists.
 
-    @classmethod
-    def cwd(cls):
-        """Return a new path pointing to the current working directory
-        (as returned by os.getcwd()).
+        This method normally follows symlinks; to check whether a symlink exists,
+        add the argument follow_symlinks=False.
         """
-        return cls(os.getcwd())
+        try:
+            self.stat(follow_symlinks=follow_symlinks)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+        return True
 
-    @classmethod
-    def home(cls):
-        """Return a new path pointing to the user's home directory (as
-        returned by os.path.expanduser('~')).
+    def is_dir(self):
         """
-        return cls("~").expanduser()
+        Whether this path is a directory.
+        """
+        try:
+            return S_ISDIR(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_file(self):
+        """
+        Whether this path is a regular file (also True for symlinks pointing
+        to regular files).
+        """
+        try:
+            return S_ISREG(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_mount(self):
+        """
+        Check if this path is a mount point
+        """
+        return self._flavour.ismount(self)
+
+    def is_symlink(self):
+        """
+        Whether this path is a symbolic link.
+        """
+        try:
+            return S_ISLNK(self.lstat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_junction(self):
+        """
+        Whether this path is a junction.
+        """
+        return self._flavour.isjunction(self)
+
+    def is_block_device(self):
+        """
+        Whether this path is a block device.
+        """
+        try:
+            return S_ISBLK(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_char_device(self):
+        """
+        Whether this path is a character device.
+        """
+        try:
+            return S_ISCHR(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_fifo(self):
+        """
+        Whether this path is a FIFO.
+        """
+        try:
+            return S_ISFIFO(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
+
+    def is_socket(self):
+        """
+        Whether this path is a socket.
+        """
+        try:
+            return S_ISSOCK(self.stat().st_mode)
+        except OSError as e:
+            if not _ignore_error(e):
+                raise
+            # Path doesn't exist or is a broken symlink
+            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
+            return False
+        except ValueError:
+            # Non-encodable path
+            return False
 
     def samefile(self, other_path):
         """Return whether other_path is the same or not as this file
@@ -921,12 +999,59 @@ class Path(PurePath):
         try:
             other_st = other_path.stat()
         except AttributeError:
-            other_st = self.__class__(other_path).stat()
-        return os.path.samestat(st, other_st)
+            other_st = self.with_segments(other_path).stat()
+        return self._flavour.samestat(st, other_st)
+
+    def open(self, mode='r', buffering=-1, encoding=None,
+             errors=None, newline=None):
+        """
+        Open the file pointed by this path and return a file object, as
+        the built-in open() function does.
+        """
+        if "b" not in mode:
+            encoding = io.text_encoding(encoding)
+        return io.open(self, mode, buffering, encoding, errors, newline)
+
+    def read_bytes(self):
+        """
+        Open the file in bytes mode, read it, and close the file.
+        """
+        with self.open(mode='rb') as f:
+            return f.read()
+
+    def read_text(self, encoding=None, errors=None):
+        """
+        Open the file in text mode, read it, and close the file.
+        """
+        encoding = io.text_encoding(encoding)
+        with self.open(mode='r', encoding=encoding, errors=errors) as f:
+            return f.read()
+
+    def write_bytes(self, data):
+        """
+        Open the file in bytes mode, write to it, and close the file.
+        """
+        # type-check for the buffer interface before truncating the file
+        view = memoryview(data)
+        with self.open(mode='wb') as f:
+            return f.write(view)
+
+    def write_text(self, data, encoding=None, errors=None, newline=None):
+        """
+        Open the file in text mode, write to it, and close the file.
+        """
+        if not isinstance(data, str):
+            raise TypeError('data must be str, not %s' %
+                            data.__class__.__name__)
+        encoding = io.text_encoding(encoding)
+        with self.open(mode='w', encoding=encoding, errors=errors, newline=newline) as f:
+            return f.write(data)
 
     def iterdir(self):
-        """Iterate over the files in this directory.  Does not yield any
-        result for the special paths '.' and '..'.
+        """Yield path objects of the directory contents.
+
+        The children are yielded in arbitrary order, and the
+        special entries '.' and '..' are not included.
         """
         for name in os.listdir(self):
             yield self._make_child_relpath(name)
@@ -937,37 +1062,145 @@ class Path(PurePath):
         # includes scandir(), which is used to implement glob().
         return os.scandir(self)
 
-    def glob(self, pattern):
+    def _make_child_relpath(self, name):
+        path_str = str(self)
+        tail = self._tail
+        if tail:
+            path_str = f'{path_str}{self._flavour.sep}{name}'
+        elif path_str != '.':
+            path_str = f'{path_str}{name}'
+        else:
+            path_str = name
+        path = self.with_segments(path_str)
+        path._str = path_str
+        path._drv = self.drive
+        path._root = self.root
+        path._tail_cached = tail + [name]
+        return path
+
+    def glob(self, pattern, *, case_sensitive=None):
         """Iterate over this subtree and yield all existing files (of any
         kind, including directories) matching the given relative pattern.
         """
         sys.audit("pathlib.Path.glob", self, pattern)
         if not pattern:
             raise ValueError("Unacceptable pattern: {!r}".format(pattern))
-        drv, root, pattern_parts = self._flavour.parse_parts((pattern,))
+        drv, root, pattern_parts = self._parse_path(pattern)
         if drv or root:
             raise NotImplementedError("Non-relative patterns are unsupported")
         if pattern[-1] in (self._flavour.sep, self._flavour.altsep):
             pattern_parts.append('')
-        selector = _make_selector(tuple(pattern_parts), self._flavour)
+        selector = _make_selector(tuple(pattern_parts), self._flavour, case_sensitive)
         for p in selector.select_from(self):
             yield p
 
-    def rglob(self, pattern):
+    def rglob(self, pattern, *, case_sensitive=None):
         """Recursively yield all existing files (of any kind, including
         directories) matching the given relative pattern, anywhere in
         this subtree.
         """
         sys.audit("pathlib.Path.rglob", self, pattern)
-        drv, root, pattern_parts = self._flavour.parse_parts((pattern,))
+        drv, root, pattern_parts = self._parse_path(pattern)
         if drv or root:
             raise NotImplementedError("Non-relative patterns are unsupported")
         if pattern and pattern[-1] in (self._flavour.sep, self._flavour.altsep):
             pattern_parts.append('')
-        selector = _make_selector(("**",) + tuple(pattern_parts), self._flavour)
+        selector = _make_selector(("**",) + tuple(pattern_parts), self._flavour, case_sensitive)
         for p in selector.select_from(self):
             yield p
 
+    def walk(self, top_down=True, on_error=None, follow_symlinks=False):
+        """Walk the directory tree from this directory, similar to os.walk()."""
+        sys.audit("pathlib.Path.walk", self, on_error, follow_symlinks)
+        paths = [self]
+
+        while paths:
+            path = paths.pop()
+            if isinstance(path, tuple):
+                yield path
+                continue
+
+            # We may not have read permission for self, in which case we can't
+            # get a list of the files the directory contains. os.walk()
+            # always suppressed the exception in that instance, rather than
+            # blow up for a minor reason when (say) a thousand readable
+            # directories are still left to visit. That logic is copied here.
+            try:
+                scandir_it = path._scandir()
+            except OSError as error:
+                if on_error is not None:
+                    on_error(error)
+                continue
+
+            with scandir_it:
+                dirnames = []
+                filenames = []
+                for entry in scandir_it:
+                    try:
+                        is_dir = entry.is_dir(follow_symlinks=follow_symlinks)
+                    except OSError:
+                        # Carried over from os.path.isdir().
+                        is_dir = False
+
+                    if is_dir:
+                        dirnames.append(entry.name)
+                    else:
+                        filenames.append(entry.name)
+
+            if top_down:
+                yield path, dirnames, filenames
+            else:
+                paths.append((path, dirnames, filenames))
+
+            paths += [path._make_child_relpath(d) for d in reversed(dirnames)]
+
+    def __init__(self, *args, **kwargs):
+        if kwargs:
+            msg = ("support for supplying keyword arguments to pathlib.PurePath "
+                   "is deprecated and scheduled for removal in Python {remove}")
+            warnings._deprecated("pathlib.PurePath(**kwargs)", msg, remove=(3, 14))
+        super().__init__(*args)
+
+    def __new__(cls, *args, **kwargs):
+        if cls is Path:
+            cls = WindowsPath if os.name == 'nt' else PosixPath
+        return object.__new__(cls)
+
+    def __enter__(self):
+        # In previous versions of pathlib, __exit__() marked this path as
+        # closed; subsequent attempts to perform I/O would raise an IOError.
+        # This functionality was never documented, and had the effect of
+        # making Path objects mutable, contrary to PEP 428.
+        # In Python 3.9 __exit__() was made a no-op.
+        # In Python 3.11 __enter__() began emitting DeprecationWarning.
+        # In Python 3.13 __enter__() and __exit__() should be removed.
+        warnings.warn("pathlib.Path.__enter__() is deprecated and scheduled "
+                      "for removal in Python 3.13; Path objects as a context "
+                      "manager is a no-op",
+                      DeprecationWarning, stacklevel=2)
+        return self
+
+    def __exit__(self, t, v, tb):
+        pass
+
+    # Public API
+
+    @classmethod
+    def cwd(cls):
+        """Return a new path pointing to the current working directory."""
+        # We call 'absolute()' rather than using 'os.getcwd()' directly to
+        # enable users to replace the implementation of 'absolute()' in a
+        # subclass and benefit from the new behaviour here. This works because
+        # os.path.abspath('.') == os.getcwd().
+        return cls().absolute()
+
+    @classmethod
+    def home(cls):
+        """Return a new path pointing to the user's home directory (as
+        returned by os.path.expanduser('~')).
+        """
+        return cls("~").expanduser()
+
     def absolute(self):
         """Return an absolute version of this path by prepending the current
         working directory. No normalization or symlink resolution is performed.
@@ -976,7 +1209,21 @@ class Path(PurePath):
         """
         if self.is_absolute():
             return self
-        return self._from_parts([self.cwd()] + self._parts)
+        elif self.drive:
+            # There is a CWD on each drive-letter drive.
+            cwd = self._flavour.abspath(self.drive)
+        else:
+            cwd = os.getcwd()
+            # Fast path for "empty" paths, e.g. Path("."), Path("") or Path().
+            # We pass only one argument to with_segments() to avoid the cost
+            # of joining, and we exploit the fact that getcwd() returns a
+            # fully-normalized string by storing it in _str. This is used to
+            # implement Path.cwd().
+            if not self.root and not self._tail:
+                result = self.with_segments(cwd)
+                result._str = cwd
+                return result
+        return self.with_segments(cwd, self)
 
     def resolve(self, strict=False):
         """
@@ -990,11 +1237,11 @@ class Path(PurePath):
                 raise RuntimeError("Symlink loop from %r" % e.filename)
 
         try:
-            s = os.path.realpath(self, strict=strict)
+            s = self._flavour.realpath(self, strict=strict)
         except OSError as e:
             check_eloop(e)
             raise
-        p = self._from_parts((s,))
+        p = self.with_segments(s)
 
         # In non-strict mode, realpath() doesn't raise on symlink loops.
         # Ensure we get an exception by calling stat()
@@ -1005,13 +1252,6 @@ class Path(PurePath):
                 check_eloop(e)
         return p
 
-    def stat(self, *, follow_symlinks=True):
-        """
-        Return the result of the stat() system call on this path, like
-        os.stat() does.
-        """
-        return os.stat(self, follow_symlinks=follow_symlinks)
-
     def owner(self):
         """
         Return the login name of the file owner.
@@ -1033,58 +1273,13 @@ class Path(PurePath):
         except ImportError:
             raise NotImplementedError("Path.group() is unsupported on this system")
 
-    def open(self, mode='r', buffering=-1, encoding=None,
-             errors=None, newline=None):
-        """
-        Open the file pointed by this path and return a file object, as
-        the built-in open() function does.
-        """
-        if "b" not in mode:
-            encoding = io.text_encoding(encoding)
-        return io.open(self, mode, buffering, encoding, errors, newline)
-
-    def read_bytes(self):
-        """
-        Open the file in bytes mode, read it, and close the file.
-        """
-        with self.open(mode='rb') as f:
-            return f.read()
-
-    def read_text(self, encoding=None, errors=None):
-        """
-        Open the file in text mode, read it, and close the file.
-        """
-        encoding = io.text_encoding(encoding)
-        with self.open(mode='r', encoding=encoding, errors=errors) as f:
-            return f.read()
-
-    def write_bytes(self, data):
-        """
-        Open the file in bytes mode, write to it, and close the file.
-        """
-        # type-check for the buffer interface before truncating the file
-        view = memoryview(data)
-        with self.open(mode='wb') as f:
-            return f.write(view)
-
-    def write_text(self, data, encoding=None, errors=None, newline=None):
-        """
-        Open the file in text mode, write to it, and close the file.
-        """
-        if not isinstance(data, str):
-            raise TypeError('data must be str, not %s' %
-                            data.__class__.__name__)
-        encoding = io.text_encoding(encoding)
-        with self.open(mode='w', encoding=encoding, errors=errors, newline=newline) as f:
-            return f.write(data)
-
     def readlink(self):
         """
         Return the path to which the symbolic link points.
         """
         if not hasattr(os, "readlink"):
             raise NotImplementedError("os.readlink() not available on this system")
-        return self._from_parts((os.readlink(self),))
+        return self.with_segments(os.readlink(self))
 
     def touch(self, mode=0o666, exist_ok=True):
         """
@@ -1155,13 +1350,6 @@ class Path(PurePath):
         """
         os.rmdir(self)
 
-    def lstat(self):
-        """
-        Like stat(), except if the path points to a symlink, the symlink's
-        status information is returned, rather than its target's.
-        """
-        return self.stat(follow_symlinks=False)
-
     def rename(self, target):
         """
         Rename this path to the target path.
@@ -1173,7 +1361,7 @@ class Path(PurePath):
         Returns the new Path instance pointing to the target path.
         """
         os.rename(self, target)
-        return self.__class__(target)
+        return self.with_segments(target)
 
     def replace(self, target):
         """
@@ -1186,7 +1374,7 @@ class Path(PurePath):
         Returns the new Path instance pointing to the target path.
         """
         os.replace(self, target)
-        return self.__class__(target)
+        return self.with_segments(target)
 
     def symlink_to(self, target, target_is_directory=False):
         """
@@ -1207,183 +1395,17 @@ class Path(PurePath):
             raise NotImplementedError("os.link() not available on this system")
         os.link(target, self)
 
-    def link_to(self, target):
-        """
-        Make the target path a hard link pointing to this path.
-
-        Note this function does not make this path a hard link to *target*,
-        despite the implication of the function and argument names. The order
-        of arguments (target, link) is the reverse of Path.symlink_to, but
-        matches that of os.link.
-
-        Deprecated since Python 3.10 and scheduled for removal in Python 3.12.
-        Use `hardlink_to()` instead.
-        """
-        warnings.warn("pathlib.Path.link_to() is deprecated and is scheduled "
-                      "for removal in Python 3.12. "
-                      "Use pathlib.Path.hardlink_to() instead.",
-                      DeprecationWarning, stacklevel=2)
-        self.__class__(target).hardlink_to(self)
-
-    # Convenience functions for querying the stat results
-
-    def exists(self):
-        """
-        Whether this path exists.
-        """
-        try:
-            self.stat()
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-        return True
-
-    def is_dir(self):
-        """
-        Whether this path is a directory.
-        """
-        try:
-            return S_ISDIR(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_file(self):
-        """
-        Whether this path is a regular file (also True for symlinks pointing
-        to regular files).
-        """
-        try:
-            return S_ISREG(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_mount(self):
-        """
-        Check if this path is a POSIX mount point
-        """
-        # Need to exist and be a dir
-        if not self.exists() or not self.is_dir():
-            return False
-
-        try:
-            parent_dev = self.parent.stat().st_dev
-        except OSError:
-            return False
-
-        dev = self.stat().st_dev
-        if dev != parent_dev:
-            return True
-        ino = self.stat().st_ino
-        parent_ino = self.parent.stat().st_ino
-        return ino == parent_ino
-
-    def is_symlink(self):
-        """
-        Whether this path is a symbolic link.
-        """
-        try:
-            return S_ISLNK(self.lstat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_block_device(self):
-        """
-        Whether this path is a block device.
-        """
-        try:
-            return S_ISBLK(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_char_device(self):
-        """
-        Whether this path is a character device.
-        """
-        try:
-            return S_ISCHR(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_fifo(self):
-        """
-        Whether this path is a FIFO.
-        """
-        try:
-            return S_ISFIFO(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
-    def is_socket(self):
-        """
-        Whether this path is a socket.
-        """
-        try:
-            return S_ISSOCK(self.stat().st_mode)
-        except OSError as e:
-            if not _ignore_error(e):
-                raise
-            # Path doesn't exist or is a broken symlink
-            # (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
-            return False
-        except ValueError:
-            # Non-encodable path
-            return False
-
     def expanduser(self):
         """ Return a new path with expanded ~ and ~user constructs
         (as returned by os.path.expanduser)
         """
-        if (not (self._drv or self._root) and
-            self._parts and self._parts[0][:1] == '~'):
-            homedir = os.path.expanduser(self._parts[0])
+        if (not (self.drive or self.root) and
+            self._tail and self._tail[0][:1] == '~'):
+            homedir = self._flavour.expanduser(self._tail[0])
             if homedir[:1] == "~":
                 raise RuntimeError("Could not determine home directory.")
-            return self._from_parts([homedir] + self._parts[1:])
+            drv, root, tail = self._parse_path(homedir)
+            return self._from_parsed_parts(drv, root, tail + self._tail[1:])
 
         return self
 
@@ -1395,6 +1417,11 @@ class PosixPath(Path, PurePosixPath):
     """
     __slots__ = ()
 
+    if os.name == 'nt':
+        def __new__(cls, *args, **kwargs):
+            raise NotImplementedError(
+                f"cannot instantiate {cls.__name__!r} on your system")
+
 class WindowsPath(Path, PureWindowsPath):
     """Path subclass for Windows systems.
 
@@ -1402,5 +1429,7 @@ class WindowsPath(Path, PureWindowsPath):
     """
     __slots__ = ()
 
-    def is_mount(self):
-        raise NotImplementedError("Path.is_mount() is unsupported on this system")
+    if os.name != 'nt':
+        def __new__(cls, *args, **kwargs):
+            raise NotImplementedError(
+                f"cannot instantiate {cls.__name__!r} on your system")
diff --git a/contrib/tools/python3/src/Lib/pdb.py b/contrib/tools/python3/src/Lib/pdb.py
index 4a4a0b9d90..a838a26b03 100755
--- a/contrib/tools/python3/src/Lib/pdb.py
+++ b/contrib/tools/python3/src/Lib/pdb.py
@@ -76,6 +76,7 @@ import bdb
 import dis
 import code
 import glob
+import token
 import pprint
 import signal
 import inspect
@@ -276,6 +277,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         self.lineno = None
         self.stack = []
         self.curindex = 0
+        if hasattr(self, 'curframe') and self.curframe:
+            self.curframe.f_globals.pop('__pdb_convenience_variables', None)
         self.curframe = None
         self.tb_lineno.clear()
 
@@ -294,6 +297,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         # locals whenever the .f_locals accessor is called, so we
         # cache it here to ensure that modifications are not overwritten.
         self.curframe_locals = self.curframe.f_locals
+        self.set_convenience_variable(self.curframe, '_frame', self.curframe)
         return self.execRcLines()
 
     # Can be executed earlier than 'setup' if desired
@@ -365,6 +369,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         if self._wait_for_mainpyfile:
             return
         frame.f_locals['__return__'] = return_value
+        self.set_convenience_variable(frame, '_retval', return_value)
         self.message('--Return--')
         self.interaction(frame, None)
 
@@ -375,6 +380,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
             return
         exc_type, exc_value, exc_traceback = exc_info
         frame.f_locals['__exception__'] = exc_type, exc_value
+        self.set_convenience_variable(frame, '_exception', exc_value)
 
         # An 'Internal StopIteration' exception is an exception debug event
         # issued by the interpreter when handling a subgenerator run with
@@ -383,8 +389,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         # stop when the debuggee is returning from such generators.
         prefix = 'Internal ' if (not exc_traceback
                                     and exc_type is StopIteration) else ''
-        self.message('%s%s' % (prefix,
-            traceback.format_exception_only(exc_type, exc_value)[-1].strip()))
+        self.message('%s%s' % (prefix, self._format_exc(exc_value)))
         self.interaction(frame, exc_traceback)
 
     # General interaction function
@@ -401,6 +406,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
                 self.message('--KeyboardInterrupt--')
 
     # Called before loop, handles display expressions
+    # Set up convenience variable containers
     def preloop(self):
         displaying = self.displaying.get(self.curframe)
         if displaying:
@@ -442,7 +448,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
             self.message(repr(obj))
 
     def default(self, line):
-        if line[:1] == '!': line = line[1:]
+        if line[:1] == '!': line = line[1:].strip()
         locals = self.curframe_locals
         globals = self.curframe.f_globals
         try:
@@ -462,6 +468,39 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         except:
             self._error_exc()
 
+    def _replace_convenience_variables(self, line):
+        """Replace the convenience variables in 'line' with their values.
+           e.g. $foo is replaced by __pdb_convenience_variables["foo"].
+           Note: such pattern in string literals will be skipped"""
+
+        if "$" not in line:
+            return line
+
+        dollar_start = dollar_end = -1
+        replace_variables = []
+        try:
+            for t in tokenize.generate_tokens(io.StringIO(line).readline):
+                token_type, token_string, start, end, _ = t
+                if token_type == token.OP and token_string == '$':
+                    dollar_start, dollar_end = start, end
+                elif start == dollar_end and token_type == token.NAME:
+                    # line is a one-line command so we only care about column
+                    replace_variables.append((dollar_start[1], end[1], token_string))
+        except tokenize.TokenError:
+            return line
+
+        if not replace_variables:
+            return line
+
+        last_end = 0
+        line_pieces = []
+        for start, end, name in replace_variables:
+            line_pieces.append(line[last_end:start] + f'__pdb_convenience_variables["{name}"]')
+            last_end = end
+        line_pieces.append(line[last_end:])
+
+        return ''.join(line_pieces)
+
     def precmd(self, line):
         """Handle alias expansion and ';;' separator."""
         if not line.strip():
@@ -485,6 +524,10 @@ class Pdb(bdb.Bdb, cmd.Cmd):
                 next = line[marker+2:].lstrip()
                 self.cmdqueue.append(next)
                 line = line[:marker].rstrip()
+
+        # Replace all the convenience variables
+        line = self._replace_convenience_variables(line)
+
         return line
 
     def onecmd(self, line):
@@ -535,6 +578,13 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     def error(self, msg):
         print('***', msg, file=self.stdout)
 
+    # convenience variables
+
+    def set_convenience_variable(self, frame, name, value):
+        if '__pdb_convenience_variables' not in frame.f_globals:
+            frame.f_globals['__pdb_convenience_variables'] = {}
+        frame.f_globals['__pdb_convenience_variables'][name] = value
+
     # Generic completion functions.  Individual complete_foo methods can be
     # assigned below to one of these functions.
 
@@ -594,7 +644,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     # Return true to exit from the command loop
 
     def do_commands(self, arg):
-        """commands [bpnumber]
+        """(Pdb) commands [bpnumber]
         (com) ...
         (com) end
         (Pdb)
@@ -680,6 +730,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_break(self, arg, temporary = 0):
         """b(reak) [ ([filename:]lineno | function) [, condition] ]
+
         Without argument, list all breaks.
 
         With a line number argument, set a break at this line in the
@@ -709,6 +760,9 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         if comma > 0:
             # parse stuff after comma: "condition"
             cond = arg[comma+1:].lstrip()
+            if err := self._compile_error_message(cond):
+                self.error('Invalid condition %s: %r' % (cond, err))
+                return
             arg = arg[:comma].rstrip()
         # parse stuff before comma: [filename:]lineno | function
         colon = arg.rfind(':')
@@ -785,6 +839,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_tbreak(self, arg):
         """tbreak [ ([filename:]lineno | function) [, condition] ]
+
         Same arguments as break, but sets a temporary breakpoint: it
         is automatically deleted when first hit.
         """
@@ -849,6 +904,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_enable(self, arg):
         """enable bpnumber [bpnumber ...]
+
         Enables the breakpoints given as a space separated list of
         breakpoint numbers.
         """
@@ -866,6 +922,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_disable(self, arg):
         """disable bpnumber [bpnumber ...]
+
         Disables the breakpoints given as a space separated list of
         breakpoint numbers.  Disabling a breakpoint means it cannot
         cause the program to stop execution, but unlike clearing a
@@ -886,6 +943,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_condition(self, arg):
         """condition bpnumber [condition]
+
         Set a new condition for the breakpoint, an expression which
         must evaluate to true before the breakpoint is honored.  If
         condition is absent, any existing condition is removed; i.e.,
@@ -894,6 +952,9 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         args = arg.split(' ', 1)
         try:
             cond = args[1]
+            if err := self._compile_error_message(cond):
+                self.error('Invalid condition %s: %r' % (cond, err))
+                return
         except IndexError:
             cond = None
         try:
@@ -913,6 +974,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_ignore(self, arg):
         """ignore bpnumber [count]
+
         Set the ignore count for the given breakpoint number.  If
         count is omitted, the ignore count is set to 0.  A breakpoint
         becomes active when the ignore count is zero.  When non-zero,
@@ -947,7 +1009,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     complete_ignore = _complete_bpnumber
 
     def do_clear(self, arg):
-        """cl(ear) filename:lineno\ncl(ear) [bpnumber [bpnumber...]]
+        """cl(ear) [filename:lineno | bpnumber ...]
+
         With a space separated list of breakpoint numbers, clear
         those breakpoints.  Without argument, clear all breaks (but
         first ask confirmation).  With a filename:lineno argument,
@@ -999,6 +1062,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_where(self, arg):
         """w(here)
+
         Print a stack trace, with the most recent frame at the bottom.
         An arrow indicates the "current frame", which determines the
         context of most commands.  'bt' is an alias for this command.
@@ -1012,11 +1076,13 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         self.curindex = number
         self.curframe = self.stack[self.curindex][0]
         self.curframe_locals = self.curframe.f_locals
+        self.set_convenience_variable(self.curframe, '_frame', self.curframe)
         self.print_stack_entry(self.stack[self.curindex])
         self.lineno = None
 
     def do_up(self, arg):
         """u(p) [count]
+
         Move the current frame count (default one) levels up in the
         stack trace (to an older frame).
         """
@@ -1037,6 +1103,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_down(self, arg):
         """d(own) [count]
+
         Move the current frame count (default one) levels down in the
         stack trace (to a newer frame).
         """
@@ -1057,6 +1124,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_until(self, arg):
         """unt(il) [lineno]
+
         Without argument, continue execution until the line with a
         number greater than the current one is reached.  With a line
         number, continue execution until a line with a number greater
@@ -1081,6 +1149,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_step(self, arg):
         """s(tep)
+
         Execute the current line, stop at the first possible occasion
         (either in a function that is called or in the current
         function).
@@ -1091,6 +1160,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_next(self, arg):
         """n(ext)
+
         Continue execution until the next line in the current function
         is reached or it returns.
         """
@@ -1100,6 +1170,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_run(self, arg):
         """run [args...]
+
         Restart the debugged python program. If a string is supplied
         it is split with "shlex", and the result is used as the new
         sys.argv.  History, breakpoints, actions and debugger options
@@ -1121,6 +1192,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_return(self, arg):
         """r(eturn)
+
         Continue execution until the current function returns.
         """
         self.set_return(self.curframe)
@@ -1129,6 +1201,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_continue(self, arg):
         """c(ont(inue))
+
         Continue execution, only stop when a breakpoint is encountered.
         """
         if not self.nosigint:
@@ -1147,6 +1220,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_jump(self, arg):
         """j(ump) lineno
+
         Set the next line that will be executed.  Only available in
         the bottom-most frame.  This lets you jump back and execute
         code again, or jump forward to skip code that you don't want
@@ -1176,6 +1250,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_debug(self, arg):
         """debug code
+
         Enter a recursive debugger that steps through the code
         argument (which is an arbitrary expression or statement to be
         executed in the current environment).
@@ -1197,7 +1272,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     complete_debug = _complete_expression
 
     def do_quit(self, arg):
-        """q(uit)\nexit
+        """q(uit) | exit
+
         Quit from the debugger. The program being executed is aborted.
         """
         self._user_requested_quit = True
@@ -1209,6 +1285,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_EOF(self, arg):
         """EOF
+
         Handles the receipt of EOF as a command.
         """
         self.message('')
@@ -1218,6 +1295,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_args(self, arg):
         """a(rgs)
+
         Print the argument list of the current function.
         """
         co = self.curframe.f_code
@@ -1235,6 +1313,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_retval(self, arg):
         """retval
+
         Print the return value for the last return of a function.
         """
         if '__return__' in self.curframe_locals:
@@ -1256,14 +1335,12 @@ class Pdb(bdb.Bdb, cmd.Cmd):
                 return eval(arg, self.curframe.f_globals, self.curframe_locals)
             else:
                 return eval(arg, frame.f_globals, frame.f_locals)
-        except:
-            exc_info = sys.exc_info()[:2]
-            err = traceback.format_exception_only(*exc_info)[-1].strip()
-            return _rstr('** raised %s **' % err)
+        except BaseException as exc:
+            return _rstr('** raised %s **' % self._format_exc(exc))
 
     def _error_exc(self):
-        exc_info = sys.exc_info()[:2]
-        self.error(traceback.format_exception_only(*exc_info)[-1].strip())
+        exc = sys.exception()
+        self.error(self._format_exc(exc))
 
     def _msg_val_func(self, arg, func):
         try:
@@ -1283,12 +1360,14 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_p(self, arg):
         """p expression
+
         Print the value of the expression.
         """
         self._msg_val_func(arg, repr)
 
     def do_pp(self, arg):
         """pp expression
+
         Pretty-print the value of the expression.
         """
         self._msg_val_func(arg, pprint.pformat)
@@ -1298,7 +1377,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     complete_pp = _complete_expression
 
     def do_list(self, arg):
-        """l(ist) [first [,last] | .]
+        """l(ist) [first[, last] | .]
 
         List source code for the current file.  Without arguments,
         list 11 lines around the current line or continue the previous
@@ -1355,7 +1434,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     do_l = do_list
 
     def do_longlist(self, arg):
-        """longlist | ll
+        """ll | longlist
+
         List the whole source code for the current function or frame.
         """
         filename = self.curframe.f_code.co_filename
@@ -1370,6 +1450,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_source(self, arg):
         """source expression
+
         Try to get source code for the given object and display it.
         """
         try:
@@ -1407,7 +1488,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
             self.message(s + '\t' + line.rstrip())
 
     def do_whatis(self, arg):
-        """whatis arg
+        """whatis expression
+
         Print the type of the argument.
         """
         try:
@@ -1450,13 +1532,19 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         Without expression, list all display expressions for the current frame.
         """
         if not arg:
-            self.message('Currently displaying:')
-            for key, val in self.displaying.get(self.curframe, {}).items():
-                self.message('%s: %s' % (key, self._safe_repr(val, key)))
+            if self.displaying:
+                self.message('Currently displaying:')
+                for key, val in self.displaying.get(self.curframe, {}).items():
+                    self.message('%s: %s' % (key, self._safe_repr(val, key)))
+            else:
+                self.message('No expression is being displayed')
         else:
-            val = self._getval_except(arg)
-            self.displaying.setdefault(self.curframe, {})[arg] = val
-            self.message('display %s: %s' % (arg, self._safe_repr(val, arg)))
+            if err := self._compile_error_message(arg):
+                self.error('Unable to display %s: %r' % (arg, err))
+            else:
+                val = self._getval_except(arg)
+                self.displaying.setdefault(self.curframe, {})[arg] = val
+                self.message('display %s: %s' % (arg, self._safe_repr(val, arg)))
 
     complete_display = _complete_expression
 
@@ -1489,7 +1577,8 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         code.interact("*interactive*", local=ns)
 
     def do_alias(self, arg):
-        """alias [name [command [parameter parameter ...] ]]
+        """alias [name [command]]
+
         Create an alias called 'name' that executes 'command'.  The
         command must *not* be enclosed in quotes.  Replaceable
         parameters can be indicated by %1, %2, and so on, while %* is
@@ -1528,6 +1617,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_unalias(self, arg):
         """unalias name
+
         Delete the specified alias.
         """
         args = arg.split()
@@ -1570,6 +1660,7 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
     def do_help(self, arg):
         """h(elp)
+
         Without argument, print the list of available commands.
         With a command name as argument, print help about that command.
         "help pdb" shows the full pdb documentation.
@@ -1593,17 +1684,21 @@ class Pdb(bdb.Bdb, cmd.Cmd):
             if command.__doc__ is None:
                 self.error('No help for %r; __doc__ string missing' % arg)
                 return
-            self.message(command.__doc__.rstrip())
+            self.message(self._help_message_from_doc(command.__doc__))
 
     do_h = do_help
 
     def help_exec(self):
         """(!) statement
+
         Execute the (one-line) statement in the context of the current
         stack frame.  The exclamation point can be omitted unless the
-        first word of the statement resembles a debugger command.  To
-        assign to a global variable you must always prefix the command
-        with a 'global' command, e.g.:
+        first word of the statement resembles a debugger command, e.g.:
+        (Pdb) ! n=42
+        (Pdb)
+
+        To assign to a global variable you must always prefix the command with
+        a 'global' command, e.g.:
         (Pdb) global list_options; list_options = ['-l']
         (Pdb)
         """
@@ -1661,6 +1756,14 @@ class Pdb(bdb.Bdb, cmd.Cmd):
     def _format_exc(self, exc: BaseException):
         return traceback.format_exception_only(exc)[-1].strip()
 
+    def _compile_error_message(self, expr):
+        """Return the error message as string if compiling `expr` fails."""
+        try:
+            compile(expr, "<stdin>", "eval")
+        except SyntaxError as exc:
+            return _rstr(self._format_exc(exc))
+        return ""
+
     def _getsourcelines(self, obj):
         # GH-103319
         # inspect.getsourcelines() returns lineno = 0 for
@@ -1671,6 +1774,26 @@ class Pdb(bdb.Bdb, cmd.Cmd):
         lineno = max(1, lineno)
         return lines, lineno
 
+    def _help_message_from_doc(self, doc):
+        lines = [line.strip() for line in doc.rstrip().splitlines()]
+        if not lines:
+            return "No help message found."
+        if "" in lines:
+            usage_end = lines.index("")
+        else:
+            usage_end = 1
+        formatted = []
+        indent = " " * len(self.prompt)
+        for i, line in enumerate(lines):
+            if i == 0:
+                prefix = "Usage: "
+            elif i < usage_end:
+                prefix = "       "
+            else:
+                prefix = ""
+            formatted.append(indent + prefix + line)
+        return "\n".join(formatted)
+
 # Collect all command help into docstring, if not run with -OO
 
 if __doc__ is not None:
@@ -1693,9 +1816,27 @@ if __doc__ is not None:
 # Simplified interface
 
 def run(statement, globals=None, locals=None):
+    """Execute the *statement* (given as a string or a code object)
+    under debugger control.
+
+    The debugger prompt appears before any code is executed; you can set
+    breakpoints and type continue, or you can step through the statement
+    using step or next.
+
+    The optional *globals* and *locals* arguments specify the
+    environment in which the code is executed; by default the
+    dictionary of the module __main__ is used (see the explanation of
+    the built-in exec() or eval() functions.).
+    """
     Pdb().run(statement, globals, locals)
 
 def runeval(expression, globals=None, locals=None):
+    """Evaluate the *expression* (given as a string or a code object)
+    under debugger control.
+
+    When runeval() returns, it returns the value of the expression.
+    Otherwise this function is similar to run().
+    """
     return Pdb().runeval(expression, globals, locals)
 
 def runctx(statement, globals, locals):
@@ -1703,9 +1844,23 @@ def runctx(statement, globals, locals):
     run(statement, globals, locals)
 
 def runcall(*args, **kwds):
+    """Call the function (a function or method object, not a string)
+    with the given arguments.
+
+    When runcall() returns, it returns whatever the function call
+    returned. The debugger prompt appears as soon as the function is
+    entered.
+    """
     return Pdb().runcall(*args, **kwds)
 
 def set_trace(*, header=None):
+    """Enter the debugger at the calling stack frame.
+
+    This is useful to hard-code a breakpoint at a given point in a
+    program, even if the code is not otherwise being debugged (e.g. when
+    an assertion fails). If given, *header* is printed to the console
+    just before debugging begins.
+    """
     pdb = Pdb()
     if header is not None:
         pdb.message(header)
@@ -1714,11 +1869,18 @@ def set_trace(*, header=None):
 # Post-Mortem interface
 
 def post_mortem(t=None):
+    """Enter post-mortem debugging of the given *traceback* object.
+
+    If no traceback is given, it uses the one of the exception that is
+    currently being handled (an exception must be being handled if the
+    default is to be used).
+    """
     # handling the default
     if t is None:
-        # sys.exc_info() returns (type, value, traceback) if an exception is
-        # being handled, otherwise it returns None
-        t = sys.exc_info()[2]
+        exc = sys.exception()
+        if exc is not None:
+            t = exc.__traceback__
+
     if t is None:
         raise ValueError("A valid traceback must be passed if no "
                          "exception is being handled")
@@ -1728,7 +1890,12 @@ def post_mortem(t=None):
     p.interaction(None, t)
 
 def pm():
-    post_mortem(sys.last_traceback)
+    """Enter post-mortem debugging of the traceback found in sys.last_traceback."""
+    if hasattr(sys, 'last_exc'):
+        tb = sys.last_exc.__traceback__
+    else:
+        tb = sys.last_traceback
+    post_mortem(tb)
 
 
 # Main program for testing
@@ -1797,18 +1964,18 @@ def main():
         except Restart:
             print("Restarting", target, "with arguments:")
             print("\t" + " ".join(sys.argv[1:]))
-        except SystemExit:
+        except SystemExit as e:
             # In most cases SystemExit does not warrant a post-mortem session.
             print("The program exited via sys.exit(). Exit status:", end=' ')
-            print(sys.exc_info()[1])
+            print(e)
         except SyntaxError:
             traceback.print_exc()
             sys.exit(1)
-        except:
+        except BaseException as e:
             traceback.print_exc()
             print("Uncaught exception. Entering post mortem debugging")
             print("Running 'cont' or 'step' will restart the program")
-            t = sys.exc_info()[2]
+            t = e.__traceback__
             pdb.interaction(None, t)
             print("Post mortem debugger finished. The " + target +
                   " will be restarted")
diff --git a/contrib/tools/python3/src/Lib/pickle.py b/contrib/tools/python3/src/Lib/pickle.py
index f760bcdcba..6e3c61fd0b 100644
--- a/contrib/tools/python3/src/Lib/pickle.py
+++ b/contrib/tools/python3/src/Lib/pickle.py
@@ -98,12 +98,6 @@ class _Stop(Exception):
     def __init__(self, value):
         self.value = value
 
-# Jython has PyStringMap; it's a dict subclass with string keys
-try:
-    from org.python.core import PyStringMap
-except ImportError:
-    PyStringMap = None
-
 # Pickle opcodes.  See pickletools.py for extensive docs.  The listing
 # here is in kind-of alphabetical order of 1-character pickle code.
 # pickletools groups them by purpose.
@@ -972,8 +966,6 @@ class _Pickler:
         self._batch_setitems(obj.items())
 
     dispatch[dict] = save_dict
-    if PyStringMap is not None:
-        dispatch[PyStringMap] = save_dict
 
     def _batch_setitems(self, items):
         # Helper to batch up SETITEMS sequences; proto >= 1 only
@@ -1489,7 +1481,7 @@ class _Unpickler:
                 value = klass(*args)
             except TypeError as err:
                 raise TypeError("in constructor for %s: %s" %
-                                (klass.__name__, str(err)), sys.exc_info()[2])
+                                (klass.__name__, str(err)), err.__traceback__)
         else:
             value = klass.__new__(klass)
         self.append(value)
diff --git a/contrib/tools/python3/src/Lib/pkgutil.py b/contrib/tools/python3/src/Lib/pkgutil.py
index 56731de64a..dccbec52aa 100644
--- a/contrib/tools/python3/src/Lib/pkgutil.py
+++ b/contrib/tools/python3/src/Lib/pkgutil.py
@@ -14,7 +14,7 @@ import warnings
 __all__ = [
     'get_importer', 'iter_importers', 'get_loader', 'find_loader',
     'walk_packages', 'iter_modules', 'get_data',
-    'ImpImporter', 'ImpLoader', 'read_code', 'extend_path',
+    'read_code', 'extend_path',
     'ModuleInfo',
 ]
 
@@ -23,20 +23,6 @@ ModuleInfo = namedtuple('ModuleInfo', 'module_finder name ispkg')
 ModuleInfo.__doc__ = 'A namedtuple with minimal info about a module.'
 
 
-def _get_spec(finder, name):
-    """Return the finder-specific module spec."""
-    # Works with legacy finders.
-    try:
-        find_spec = finder.find_spec
-    except AttributeError:
-        loader = finder.find_module(name)
-        if loader is None:
-            return None
-        return importlib.util.spec_from_loader(name, loader)
-    else:
-        return find_spec(name)
-
-
 def read_code(stream):
     # This helper is needed in order for the PEP 302 emulation to
     # correctly handle compiled files
@@ -185,187 +171,6 @@ iter_importer_modules.register(
     importlib.machinery.FileFinder, _iter_file_finder_modules)
 
 
-def _import_imp():
-    global imp
-    with warnings.catch_warnings():
-        warnings.simplefilter('ignore', DeprecationWarning)
-        imp = importlib.import_module('imp')
-
-class ImpImporter:
-    """PEP 302 Finder that wraps Python's "classic" import algorithm
-
-    ImpImporter(dirname) produces a PEP 302 finder that searches that
-    directory.  ImpImporter(None) produces a PEP 302 finder that searches
-    the current sys.path, plus any modules that are frozen or built-in.
-
-    Note that ImpImporter does not currently support being used by placement
-    on sys.meta_path.
-    """
-
-    def __init__(self, path=None):
-        global imp
-        warnings.warn("This emulation is deprecated and slated for removal "
-                      "in Python 3.12; use 'importlib' instead",
-             DeprecationWarning)
-        _import_imp()
-        self.path = path
-
-    def find_module(self, fullname, path=None):
-        # Note: we ignore 'path' argument since it is only used via meta_path
-        subname = fullname.split(".")[-1]
-        if subname != fullname and self.path is None:
-            return None
-        if self.path is None:
-            path = None
-        else:
-            path = [os.path.realpath(self.path)]
-        try:
-            file, filename, etc = imp.find_module(subname, path)
-        except ImportError:
-            return None
-        return ImpLoader(fullname, file, filename, etc)
-
-    def iter_modules(self, prefix=''):
-        if self.path is None or not os.path.isdir(self.path):
-            return
-
-        yielded = {}
-        import inspect
-        try:
-            filenames = os.listdir(self.path)
-        except OSError:
-            # ignore unreadable directories like import does
-            filenames = []
-        filenames.sort()  # handle packages before same-named modules
-
-        for fn in filenames:
-            modname = inspect.getmodulename(fn)
-            if modname=='__init__' or modname in yielded:
-                continue
-
-            path = os.path.join(self.path, fn)
-            ispkg = False
-
-            if not modname and os.path.isdir(path) and '.' not in fn:
-                modname = fn
-                try:
-                    dircontents = os.listdir(path)
-                except OSError:
-                    # ignore unreadable directories like import does
-                    dircontents = []
-                for fn in dircontents:
-                    subname = inspect.getmodulename(fn)
-                    if subname=='__init__':
-                        ispkg = True
-                        break
-                else:
-                    continue    # not a package
-
-            if modname and '.' not in modname:
-                yielded[modname] = 1
-                yield prefix + modname, ispkg
-
-
-class ImpLoader:
-    """PEP 302 Loader that wraps Python's "classic" import algorithm
-    """
-    code = source = None
-
-    def __init__(self, fullname, file, filename, etc):
-        warnings.warn("This emulation is deprecated and slated for removal in "
-                      "Python 3.12; use 'importlib' instead",
-                      DeprecationWarning)
-        _import_imp()
-        self.file = file
-        self.filename = filename
-        self.fullname = fullname
-        self.etc = etc
-
-    def load_module(self, fullname):
-        self._reopen()
-        try:
-            mod = imp.load_module(fullname, self.file, self.filename, self.etc)
-        finally:
-            if self.file:
-                self.file.close()
-        # Note: we don't set __loader__ because we want the module to look
-        # normal; i.e. this is just a wrapper for standard import machinery
-        return mod
-
-    def get_data(self, pathname):
-        with open(pathname, "rb") as file:
-            return file.read()
-
-    def _reopen(self):
-        if self.file and self.file.closed:
-            mod_type = self.etc[2]
-            if mod_type==imp.PY_SOURCE:
-                self.file = open(self.filename, 'r')
-            elif mod_type in (imp.PY_COMPILED, imp.C_EXTENSION):
-                self.file = open(self.filename, 'rb')
-
-    def _fix_name(self, fullname):
-        if fullname is None:
-            fullname = self.fullname
-        elif fullname != self.fullname:
-            raise ImportError("Loader for module %s cannot handle "
-                              "module %s" % (self.fullname, fullname))
-        return fullname
-
-    def is_package(self, fullname):
-        fullname = self._fix_name(fullname)
-        return self.etc[2]==imp.PKG_DIRECTORY
-
-    def get_code(self, fullname=None):
-        fullname = self._fix_name(fullname)
-        if self.code is None:
-            mod_type = self.etc[2]
-            if mod_type==imp.PY_SOURCE:
-                source = self.get_source(fullname)
-                self.code = compile(source, self.filename, 'exec')
-            elif mod_type==imp.PY_COMPILED:
-                self._reopen()
-                try:
-                    self.code = read_code(self.file)
-                finally:
-                    self.file.close()
-            elif mod_type==imp.PKG_DIRECTORY:
-                self.code = self._get_delegate().get_code()
-        return self.code
-
-    def get_source(self, fullname=None):
-        fullname = self._fix_name(fullname)
-        if self.source is None:
-            mod_type = self.etc[2]
-            if mod_type==imp.PY_SOURCE:
-                self._reopen()
-                try:
-                    self.source = self.file.read()
-                finally:
-                    self.file.close()
-            elif mod_type==imp.PY_COMPILED:
-                if os.path.exists(self.filename[:-1]):
-                    with open(self.filename[:-1], 'r') as f:
-                        self.source = f.read()
-            elif mod_type==imp.PKG_DIRECTORY:
-                self.source = self._get_delegate().get_source()
-        return self.source
-
-    def _get_delegate(self):
-        finder = ImpImporter(self.filename)
-        spec = _get_spec(finder, '__init__')
-        return spec.loader
-
-    def get_filename(self, fullname=None):
-        fullname = self._fix_name(fullname)
-        mod_type = self.etc[2]
-        if mod_type==imp.PKG_DIRECTORY:
-            return self._get_delegate().get_filename()
-        elif mod_type in (imp.PY_SOURCE, imp.PY_COMPILED, imp.C_EXTENSION):
-            return self.filename
-        return None
-
-
 try:
     import zipimport
     from zipimport import zipimporter
@@ -465,6 +270,10 @@ def get_loader(module_or_name):
     If the named module is not already imported, its containing package
     (if any) is imported, in order to establish the package __path__.
     """
+    warnings._deprecated("pkgutil.get_loader",
+                         f"{warnings._DEPRECATED_MSG}; "
+                         "use importlib.util.find_spec() instead",
+                         remove=(3, 14))
     if module_or_name in sys.modules:
         module_or_name = sys.modules[module_or_name]
         if module_or_name is None:
@@ -489,6 +298,10 @@ def find_loader(fullname):
     importlib.util.find_spec that converts most failures to ImportError
     and only returns the loader rather than the full spec
     """
+    warnings._deprecated("pkgutil.find_loader",
+                         f"{warnings._DEPRECATED_MSG}; "
+                         "use importlib.util.find_spec() instead",
+                         remove=(3, 14))
     if fullname.startswith('.'):
         msg = "Relative module name {!r} not supported".format(fullname)
         raise ImportError(msg)
diff --git a/contrib/tools/python3/src/Lib/platform.py b/contrib/tools/python3/src/Lib/platform.py
index 9b9d88bf58..7bb222088d 100755
--- a/contrib/tools/python3/src/Lib/platform.py
+++ b/contrib/tools/python3/src/Lib/platform.py
@@ -136,11 +136,11 @@ _ver_stages = {
     'pl': 200, 'p': 200,
 }
 
-_component_re = re.compile(r'([0-9]+|[._+-])')
 
 def _comparable_version(version):
+    component_re = re.compile(r'([0-9]+|[._+-])')
     result = []
-    for v in _component_re.split(version):
+    for v in component_re.split(version):
         if v not in '._+-':
             try:
                 v = int(v, 10)
@@ -152,11 +152,6 @@ def _comparable_version(version):
 
 ### Platform specific APIs
 
-_libc_search = re.compile(b'(__libc_init)'
-                          b'|'
-                          b'(GLIBC_([0-9.]+))'
-                          b'|'
-                          br'(libc(_\w+)?\.so(?:\.(\d[0-9.]*))?)', re.ASCII)
 
 def libc_ver(executable=None, lib='', version='', chunksize=16384):
 
@@ -190,6 +185,12 @@ def libc_ver(executable=None, lib='', version='', chunksize=16384):
             # sys.executable is not set.
             return lib, version
 
+    libc_search = re.compile(b'(__libc_init)'
+                          b'|'
+                          b'(GLIBC_([0-9.]+))'
+                          b'|'
+                          br'(libc(_\w+)?\.so(?:\.(\d[0-9.]*))?)', re.ASCII)
+
     V = _comparable_version
     # We use os.path.realpath()
     # here to work around problems with Cygwin not being
@@ -200,7 +201,7 @@ def libc_ver(executable=None, lib='', version='', chunksize=16384):
         pos = 0
         while pos < len(binary):
             if b'libc' in binary or b'GLIBC' in binary:
-                m = _libc_search.search(binary, pos)
+                m = libc_search.search(binary, pos)
             else:
                 m = None
             if not m or m.end() == len(binary):
@@ -247,9 +248,6 @@ def _norm_version(version, build=''):
     version = '.'.join(strings[:3])
     return version
 
-_ver_output = re.compile(r'(?:([\w ]+) ([\w.]+) '
-                         r'.*'
-                         r'\[.* ([\d.]+)\])')
 
 # Examples of VER command output:
 #
@@ -295,9 +293,13 @@ def _syscmd_ver(system='', release='', version='',
     else:
         return system, release, version
 
+    ver_output = re.compile(r'(?:([\w ]+) ([\w.]+) '
+                         r'.*'
+                         r'\[.* ([\d.]+)\])')
+
     # Parse the output
     info = info.strip()
-    m = _ver_output.match(info)
+    m = ver_output.match(info)
     if m is not None:
         system, release, version = m.groups()
         # Strip trailing dots from version and release
@@ -310,34 +312,52 @@ def _syscmd_ver(system='', release='', version='',
         version = _norm_version(version)
     return system, release, version
 
-_WIN32_CLIENT_RELEASES = {
-    (5, 0): "2000",
-    (5, 1): "XP",
-    # Strictly, 5.2 client is XP 64-bit, but platform.py historically
-    # has always called it 2003 Server
-    (5, 2): "2003Server",
-    (5, None): "post2003",
-
-    (6, 0): "Vista",
-    (6, 1): "7",
-    (6, 2): "8",
-    (6, 3): "8.1",
-    (6, None): "post8.1",
-
-    (10, 0): "10",
-    (10, None): "post10",
-}
-
-# Server release name lookup will default to client names if necessary
-_WIN32_SERVER_RELEASES = {
-    (5, 2): "2003Server",
-
-    (6, 0): "2008Server",
-    (6, 1): "2008ServerR2",
-    (6, 2): "2012Server",
-    (6, 3): "2012ServerR2",
-    (6, None): "post2012ServerR2",
-}
+try:
+    import _wmi
+except ImportError:
+    def _wmi_query(*keys):
+        raise OSError("not supported")
+else:
+    def _wmi_query(table, *keys):
+        table = {
+            "OS": "Win32_OperatingSystem",
+            "CPU": "Win32_Processor",
+        }[table]
+        data = _wmi.exec_query("SELECT {} FROM {}".format(
+            ",".join(keys),
+            table,
+        )).split("\0")
+        split_data = (i.partition("=") for i in data)
+        dict_data = {i[0]: i[2] for i in split_data}
+        return (dict_data[k] for k in keys)
+
+
+_WIN32_CLIENT_RELEASES = [
+    ((10, 1, 0), "post11"),
+    ((10, 0, 22000), "11"),
+    ((6, 4, 0), "10"),
+    ((6, 3, 0), "8.1"),
+    ((6, 2, 0), "8"),
+    ((6, 1, 0), "7"),
+    ((6, 0, 0), "Vista"),
+    ((5, 2, 3790), "XP64"),
+    ((5, 2, 0), "XPMedia"),
+    ((5, 1, 0), "XP"),
+    ((5, 0, 0), "2000"),
+]
+
+_WIN32_SERVER_RELEASES = [
+    ((10, 1, 0), "post2022Server"),
+    ((10, 0, 20348), "2022Server"),
+    ((10, 0, 17763), "2019Server"),
+    ((6, 4, 0), "2016Server"),
+    ((6, 3, 0), "2012ServerR2"),
+    ((6, 2, 0), "2012Server"),
+    ((6, 1, 0), "2008ServerR2"),
+    ((6, 0, 0), "2008Server"),
+    ((5, 2, 0), "2003Server"),
+    ((5, 0, 0), "2000Server"),
+]
 
 def win32_is_iot():
     return win32_edition() in ('IoTUAP', 'NanoServer', 'WindowsCoreHeadless', 'IoTEdgeOS')
@@ -360,22 +380,40 @@ def win32_edition():
 
     return None
 
-def win32_ver(release='', version='', csd='', ptype=''):
+def _win32_ver(version, csd, ptype):
+    # Try using WMI first, as this is the canonical source of data
+    try:
+        (version, product_type, ptype, spmajor, spminor)  = _wmi_query(
+            'OS',
+            'Version',
+            'ProductType',
+            'BuildType',
+            'ServicePackMajorVersion',
+            'ServicePackMinorVersion',
+        )
+        is_client = (int(product_type) == 1)
+        if spminor and spminor != '0':
+            csd = f'SP{spmajor}.{spminor}'
+        else:
+            csd = f'SP{spmajor}'
+        return version, csd, ptype, is_client
+    except OSError:
+        pass
+
+    # Fall back to a combination of sys.getwindowsversion and "ver"
     try:
         from sys import getwindowsversion
     except ImportError:
-        return release, version, csd, ptype
+        return version, csd, ptype, True
 
     winver = getwindowsversion()
+    is_client = (getattr(winver, 'product_type', 1) == 1)
     try:
-        major, minor, build = map(int, _syscmd_ver()[2].split('.'))
+        version = _syscmd_ver()[2]
+        major, minor, build = map(int, version.split('.'))
     except ValueError:
         major, minor, build = winver.platform_version or winver[:3]
-    version = '{0}.{1}.{2}'.format(major, minor, build)
-
-    release = (_WIN32_CLIENT_RELEASES.get((major, minor)) or
-               _WIN32_CLIENT_RELEASES.get((major, None)) or
-               release)
+        version = '{0}.{1}.{2}'.format(major, minor, build)
 
     # getwindowsversion() reflect the compatibility mode Python is
     # running under, and so the service pack value is only going to be
@@ -387,12 +425,6 @@ def win32_ver(release='', version='', csd='', ptype=''):
             if csd[:13] == 'Service Pack ':
                 csd = 'SP' + csd[13:]
 
-    # VER_NT_SERVER = 3
-    if getattr(winver, 'product_type', None) == 3:
-        release = (_WIN32_SERVER_RELEASES.get((major, minor)) or
-                   _WIN32_SERVER_RELEASES.get((major, None)) or
-                   release)
-
     try:
         try:
             import winreg
@@ -408,6 +440,18 @@ def win32_ver(release='', version='', csd='', ptype=''):
         except OSError:
             pass
 
+    return version, csd, ptype, is_client
+
+def win32_ver(release='', version='', csd='', ptype=''):
+    is_client = False
+
+    version, csd, ptype, is_client = _win32_ver(version, csd, ptype)
+
+    if version:
+        intversion = tuple(map(int, version.split('.')))
+        releases = _WIN32_CLIENT_RELEASES if is_client else _WIN32_SERVER_RELEASES
+        release = next((r for v, r in releases if v <= intversion), release)
+
     return release, version, csd, ptype
 
 
@@ -562,7 +606,7 @@ def _platform(*args):
     platform = platform.replace('unknown', '')
 
     # Fold '--'s and remove trailing '-'
-    while 1:
+    while True:
         cleaned = platform.replace('--', '-')
         if cleaned == platform:
             break
@@ -726,6 +770,21 @@ def _get_machine_win32():
     # http://www.geocities.com/rick_lively/MANUALS/ENV/MSWIN/PROCESSI.HTM
 
     # WOW64 processes mask the native architecture
+    try:
+        [arch, *_] = _wmi_query('CPU', 'Architecture')
+    except OSError:
+        pass
+    else:
+        try:
+            arch = ['x86', 'MIPS', 'Alpha', 'PowerPC', None,
+                    'ARM', 'ia64', None, None,
+                    'AMD64', None, None, 'ARM64',
+            ][int(arch)]
+        except (ValueError, IndexError):
+            pass
+        else:
+            if arch:
+                return arch
     return (
         os.environ.get('PROCESSOR_ARCHITEW6432', '') or
         os.environ.get('PROCESSOR_ARCHITECTURE', '')
@@ -739,7 +798,12 @@ class _Processor:
         return func() or ''
 
     def get_win32():
-        return os.environ.get('PROCESSOR_IDENTIFIER', _get_machine_win32())
+        try:
+            manufacturer, caption = _wmi_query('CPU', 'Manufacturer', 'Caption')
+        except OSError:
+            return os.environ.get('PROCESSOR_IDENTIFIER', _get_machine_win32())
+        else:
+            return f'{caption}, {manufacturer}'
 
     def get_OpenVMS():
         try:
@@ -971,32 +1035,6 @@ def processor():
 
 ### Various APIs for extracting information from sys.version
 
-_sys_version_parser = re.compile(
-    r'([\w.+]+)\s*'  # "version<space>"
-    r'\(#?([^,]+)'  # "(#buildno"
-    r'(?:,\s*([\w ]*)'  # ", builddate"
-    r'(?:,\s*([\w :]*))?)?\)\s*'  # ", buildtime)<space>"
-    r'\[([^\]]+)\]?', re.ASCII)  # "[compiler]"
-
-_ironpython_sys_version_parser = re.compile(
-    r'IronPython\s*'
-    r'([\d\.]+)'
-    r'(?: \(([\d\.]+)\))?'
-    r' on (.NET [\d\.]+)', re.ASCII)
-
-# IronPython covering 2.6 and 2.7
-_ironpython26_sys_version_parser = re.compile(
-    r'([\d.]+)\s*'
-    r'\(IronPython\s*'
-    r'[\d.]+\s*'
-    r'\(([\d.]+)\) on ([\w.]+ [\d.]+(?: \(\d+-bit\))?)\)'
-)
-
-_pypy_sys_version_parser = re.compile(
-    r'([\w.+]+)\s*'
-    r'\(#?([^,]+),\s*([\w ]+),\s*([\w :]+)\)\s*'
-    r'\[PyPy [^\]]+\]?')
-
 _sys_version_cache = {}
 
 def _sys_version(sys_version=None):
@@ -1028,28 +1066,17 @@ def _sys_version(sys_version=None):
     if result is not None:
         return result
 
-    # Parse it
-    if 'IronPython' in sys_version:
-        # IronPython
-        name = 'IronPython'
-        if sys_version.startswith('IronPython'):
-            match = _ironpython_sys_version_parser.match(sys_version)
-        else:
-            match = _ironpython26_sys_version_parser.match(sys_version)
+    sys_version_parser = re.compile(
+        r'([\w.+]+)\s*'  # "version<space>"
+        r'\(#?([^,]+)'  # "(#buildno"
+        r'(?:,\s*([\w ]*)'  # ", builddate"
+        r'(?:,\s*([\w :]*))?)?\)\s*'  # ", buildtime)<space>"
+        r'\[([^\]]+)\]?', re.ASCII)  # "[compiler]"
 
-        if match is None:
-            raise ValueError(
-                'failed to parse IronPython sys.version: %s' %
-                repr(sys_version))
-
-        version, alt_version, compiler = match.groups()
-        buildno = ''
-        builddate = ''
-
-    elif sys.platform.startswith('java'):
+    if sys.platform.startswith('java'):
         # Jython
         name = 'Jython'
-        match = _sys_version_parser.match(sys_version)
+        match = sys_version_parser.match(sys_version)
         if match is None:
             raise ValueError(
                 'failed to parse Jython sys.version: %s' %
@@ -1061,8 +1088,13 @@ def _sys_version(sys_version=None):
 
     elif "PyPy" in sys_version:
         # PyPy
+        pypy_sys_version_parser = re.compile(
+            r'([\w.+]+)\s*'
+            r'\(#?([^,]+),\s*([\w ]+),\s*([\w :]+)\)\s*'
+            r'\[PyPy [^\]]+\]?')
+
         name = "PyPy"
-        match = _pypy_sys_version_parser.match(sys_version)
+        match = pypy_sys_version_parser.match(sys_version)
         if match is None:
             raise ValueError("failed to parse PyPy sys.version: %s" %
                              repr(sys_version))
@@ -1071,7 +1103,7 @@ def _sys_version(sys_version=None):
 
     else:
         # CPython
-        match = _sys_version_parser.match(sys_version)
+        match = sys_version_parser.match(sys_version)
         if match is None:
             raise ValueError(
                 'failed to parse CPython sys.version: %s' %
@@ -1109,7 +1141,6 @@ def python_implementation():
 
         Currently, the following implementations are identified:
           'CPython' (C implementation of Python),
-          'IronPython' (.NET implementation of Python),
           'Jython' (Java implementation of Python),
           'PyPy' (Python implementation of Python).
 
@@ -1184,7 +1215,7 @@ def python_compiler():
 
 _platform_cache = {}
 
-def platform(aliased=0, terse=0):
+def platform(aliased=False, terse=False):
 
     """ Returns a single string identifying the underlying platform
         with as much useful information as possible (but no more :).
@@ -1230,7 +1261,7 @@ def platform(aliased=0, terse=0):
         else:
             platform = _platform(system, release, version, csd)
 
-    elif system in ('Linux',):
+    elif system == 'Linux':
         # check for libc vs. glibc
         libcname, libcversion = libc_ver()
         platform = _platform(system, release, machine, processor,
@@ -1261,13 +1292,6 @@ def platform(aliased=0, terse=0):
 ### freedesktop.org os-release standard
 # https://www.freedesktop.org/software/systemd/man/os-release.html
 
-# NAME=value with optional quotes (' or "). The regular expression is less
-# strict than shell lexer, but that's ok.
-_os_release_line = re.compile(
-    "^(?P<name>[a-zA-Z0-9_]+)=(?P<quote>[\"\']?)(?P<value>.*)(?P=quote)$"
-)
-# unescape five special characters mentioned in the standard
-_os_release_unescape = re.compile(r"\\([\\\$\"\'`])")
 # /etc takes precedence over /usr/lib
 _os_release_candidates = ("/etc/os-release", "/usr/lib/os-release")
 _os_release_cache = None
@@ -1282,10 +1306,18 @@ def _parse_os_release(lines):
         "PRETTY_NAME": "Linux",
     }
 
+    # NAME=value with optional quotes (' or "). The regular expression is less
+    # strict than shell lexer, but that's ok.
+    os_release_line = re.compile(
+        "^(?P<name>[a-zA-Z0-9_]+)=(?P<quote>[\"\']?)(?P<value>.*)(?P=quote)$"
+    )
+    # unescape five special characters mentioned in the standard
+    os_release_unescape = re.compile(r"\\([\\\$\"\'`])")
+
     for line in lines:
-        mo = _os_release_line.match(line)
+        mo = os_release_line.match(line)
         if mo is not None:
-            info[mo.group('name')] = _os_release_unescape.sub(
+            info[mo.group('name')] = os_release_unescape.sub(
                 r"\1", mo.group('value')
             )
 
diff --git a/contrib/tools/python3/src/Lib/plistlib.py b/contrib/tools/python3/src/Lib/plistlib.py
index 53e718f063..3292c30d5f 100644
--- a/contrib/tools/python3/src/Lib/plistlib.py
+++ b/contrib/tools/python3/src/Lib/plistlib.py
@@ -208,7 +208,7 @@ class _PlistParser:
 
     def add_object(self, value):
         if self.current_key is not None:
-            if not isinstance(self.stack[-1], type({})):
+            if not isinstance(self.stack[-1], dict):
                 raise ValueError("unexpected element at line %d" %
                                  self.parser.CurrentLineNumber)
             self.stack[-1][self.current_key] = value
@@ -217,7 +217,7 @@ class _PlistParser:
             # this is the root object
             self.root = value
         else:
-            if not isinstance(self.stack[-1], type([])):
+            if not isinstance(self.stack[-1], list):
                 raise ValueError("unexpected element at line %d" %
                                  self.parser.CurrentLineNumber)
             self.stack[-1].append(value)
@@ -241,7 +241,7 @@ class _PlistParser:
         self.stack.pop()
 
     def end_key(self):
-        if self.current_key or not isinstance(self.stack[-1], type({})):
+        if self.current_key or not isinstance(self.stack[-1], dict):
             raise ValueError("unexpected key at line %d" %
                              self.parser.CurrentLineNumber)
         self.current_key = self.get_data()
diff --git a/contrib/tools/python3/src/Lib/poplib.py b/contrib/tools/python3/src/Lib/poplib.py
index 0f8587317c..9a5ef03c98 100644
--- a/contrib/tools/python3/src/Lib/poplib.py
+++ b/contrib/tools/python3/src/Lib/poplib.py
@@ -419,35 +419,19 @@ if HAVE_SSL:
     class POP3_SSL(POP3):
         """POP3 client class over SSL connection
 
-        Instantiate with: POP3_SSL(hostname, port=995, keyfile=None, certfile=None,
-                                   context=None)
+        Instantiate with: POP3_SSL(hostname, port=995, context=None)
 
                hostname - the hostname of the pop3 over ssl server
                port - port number
-               keyfile - PEM formatted file that contains your private key
-               certfile - PEM formatted certificate chain file
                context - a ssl.SSLContext
 
         See the methods of the parent class POP3 for more documentation.
         """
 
-        def __init__(self, host, port=POP3_SSL_PORT, keyfile=None, certfile=None,
-                     timeout=socket._GLOBAL_DEFAULT_TIMEOUT, context=None):
-            if context is not None and keyfile is not None:
-                raise ValueError("context and keyfile arguments are mutually "
-                                 "exclusive")
-            if context is not None and certfile is not None:
-                raise ValueError("context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom context instead", DeprecationWarning, 2)
-            self.keyfile = keyfile
-            self.certfile = certfile
+        def __init__(self, host, port=POP3_SSL_PORT,
+                     *, timeout=socket._GLOBAL_DEFAULT_TIMEOUT, context=None):
             if context is None:
-                context = ssl._create_stdlib_context(certfile=certfile,
-                                                     keyfile=keyfile)
+                context = ssl._create_stdlib_context()
             self.context = context
             POP3.__init__(self, host, port, timeout)
 
@@ -457,7 +441,7 @@ if HAVE_SSL:
                                             server_hostname=self.host)
             return sock
 
-        def stls(self, keyfile=None, certfile=None, context=None):
+        def stls(self, context=None):
             """The method unconditionally raises an exception since the
             STLS command doesn't make any sense on an already established
             SSL/TLS session.
diff --git a/contrib/tools/python3/src/Lib/posixpath.py b/contrib/tools/python3/src/Lib/posixpath.py
index 5b4d78bca0..e4f155e41a 100644
--- a/contrib/tools/python3/src/Lib/posixpath.py
+++ b/contrib/tools/python3/src/Lib/posixpath.py
@@ -28,14 +28,14 @@ import stat
 import genericpath
 from genericpath import *
 
-__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
+__all__ = ["normcase","isabs","join","splitdrive","splitroot","split","splitext",
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","getctime","islink","exists","lexists","isdir","isfile",
            "ismount", "expanduser","expandvars","normpath","abspath",
            "samefile","sameopenfile","samestat",
            "curdir","pardir","sep","pathsep","defpath","altsep","extsep",
            "devnull","realpath","supports_unicode_filenames","relpath",
-           "commonpath"]
+           "commonpath", "isjunction"]
 
 
 def _get_sep(path):
@@ -135,6 +135,35 @@ def splitdrive(p):
     return p[:0], p
 
 
+def splitroot(p):
+    """Split a pathname into drive, root and tail. On Posix, drive is always
+    empty; the root may be empty, a single slash, or two slashes. The tail
+    contains anything after the root. For example:
+
+        splitroot('foo/bar') == ('', '', 'foo/bar')
+        splitroot('/foo/bar') == ('', '/', 'foo/bar')
+        splitroot('//foo/bar') == ('', '//', 'foo/bar')
+        splitroot('///foo/bar') == ('', '/', '//foo/bar')
+    """
+    p = os.fspath(p)
+    if isinstance(p, bytes):
+        sep = b'/'
+        empty = b''
+    else:
+        sep = '/'
+        empty = ''
+    if p[:1] != sep:
+        # Relative path, e.g.: 'foo'
+        return empty, empty, p
+    elif p[1:2] != sep or p[2:3] == sep:
+        # Absolute path, e.g.: '/foo', '///foo', '////foo', etc.
+        return empty, sep, p[1:]
+    else:
+        # Precisely two leading slashes, e.g.: '//foo'. Implementation defined per POSIX, see
+        # https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13
+        return empty, p[:2], p[2:]
+
+
 # Return the tail (basename) part of a path, same as split(path)[1].
 
 def basename(p):
@@ -158,16 +187,14 @@ def dirname(p):
     return head
 
 
-# Is a path a symbolic link?
-# This will always return false on systems where os.lstat doesn't exist.
+# Is a path a junction?
+
+def isjunction(path):
+    """Test whether a path is a junction
+    Junctions are not a part of posix semantics"""
+    os.fspath(path)
+    return False
 
-def islink(path):
-    """Test whether a path is a symbolic link"""
-    try:
-        st = os.lstat(path)
-    except (OSError, ValueError, AttributeError):
-        return False
-    return stat.S_ISLNK(st.st_mode)
 
 # Being true for dangling symbolic links is also useful.
 
@@ -362,13 +389,7 @@ except ImportError:
             dotdot = '..'
         if path == empty:
             return dot
-        initial_slashes = path.startswith(sep)
-        # POSIX allows one or two initial slashes, but treats three or more
-        # as single slash.
-        # (see https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13)
-        if (initial_slashes and
-            path.startswith(sep*2) and not path.startswith(sep*3)):
-            initial_slashes = 2
+        _, initial_slashes, path = splitroot(path)
         comps = path.split(sep)
         new_comps = []
         for comp in comps:
@@ -380,9 +401,7 @@ except ImportError:
             elif new_comps:
                 new_comps.pop()
         comps = new_comps
-        path = sep.join(comps)
-        if initial_slashes:
-            path = sep*initial_slashes + path
+        path = initial_slashes + sep.join(comps)
         return path or dot
 
 else:
diff --git a/contrib/tools/python3/src/Lib/pprint.py b/contrib/tools/python3/src/Lib/pprint.py
index d638794004..9314701db3 100644
--- a/contrib/tools/python3/src/Lib/pprint.py
+++ b/contrib/tools/python3/src/Lib/pprint.py
@@ -640,19 +640,6 @@ def _recursion(object):
             % (type(object).__name__, id(object)))
 
 
-def _perfcheck(object=None):
-    import time
-    if object is None:
-        object = [("string", (1, 2), [3, 4], {5: 6, 7: 8})] * 100000
-    p = PrettyPrinter()
-    t1 = time.perf_counter()
-    p._safe_repr(object, {}, None, 0, True)
-    t2 = time.perf_counter()
-    p.pformat(object)
-    t3 = time.perf_counter()
-    print("_safe_repr:", t2 - t1)
-    print("pformat:", t3 - t2)
-
 def _wrap_bytes_repr(object, width, allowance):
     current = b''
     last = len(object) // 4 * 4
@@ -669,6 +656,3 @@ def _wrap_bytes_repr(object, width, allowance):
             current = candidate
     if current:
         yield repr(current)
-
-if __name__ == "__main__":
-    _perfcheck()
diff --git a/contrib/tools/python3/src/Lib/profile.py b/contrib/tools/python3/src/Lib/profile.py
index 90c4e4c9ff..4b82523b03 100755
--- a/contrib/tools/python3/src/Lib/profile.py
+++ b/contrib/tools/python3/src/Lib/profile.py
@@ -24,6 +24,7 @@
 # governing permissions and limitations under the License.
 
 
+import importlib.machinery
 import io
 import sys
 import time
@@ -590,9 +591,12 @@ def main():
             sys.path.insert(0, os.path.dirname(progname))
             with io.open_code(progname) as fp:
                 code = compile(fp.read(), progname, 'exec')
+            spec = importlib.machinery.ModuleSpec(name='__main__', loader=None,
+                                                  origin=progname)
             globs = {
-                '__file__': progname,
-                '__name__': '__main__',
+                '__spec__': spec,
+                '__file__': spec.origin,
+                '__name__': spec.name,
                 '__package__': None,
                 '__cached__': None,
             }
diff --git a/contrib/tools/python3/src/Lib/pstats.py b/contrib/tools/python3/src/Lib/pstats.py
index 80408313e8..51bcca8418 100644
--- a/contrib/tools/python3/src/Lib/pstats.py
+++ b/contrib/tools/python3/src/Lib/pstats.py
@@ -223,8 +223,6 @@ class Stats:
             for word, tup in self.sort_arg_dict_default.items():
                 fragment = word
                 while fragment:
-                    if not fragment:
-                        break
                     if fragment in dict:
                         bad_list[fragment] = 0
                         break
diff --git a/contrib/tools/python3/src/Lib/pty.py b/contrib/tools/python3/src/Lib/pty.py
index fefb63abfb..1d97994abe 100644
--- a/contrib/tools/python3/src/Lib/pty.py
+++ b/contrib/tools/python3/src/Lib/pty.py
@@ -40,6 +40,9 @@ def master_open():
     Open a pty master and return the fd, and the filename of the slave end.
     Deprecated, use openpty() instead."""
 
+    import warnings
+    warnings.warn("Use pty.openpty() instead.", DeprecationWarning, stacklevel=2)  # Remove API in 3.14
+
     try:
         master_fd, slave_fd = os.openpty()
     except (AttributeError, OSError):
@@ -69,6 +72,9 @@ def slave_open(tty_name):
     opened filedescriptor.
     Deprecated, use openpty() instead."""
 
+    import warnings
+    warnings.warn("Use pty.openpty() instead.", DeprecationWarning, stacklevel=2)  # Remove API in 3.14
+
     result = os.open(tty_name, os.O_RDWR)
     try:
         from fcntl import ioctl, I_PUSH
@@ -101,20 +107,8 @@ def fork():
     master_fd, slave_fd = openpty()
     pid = os.fork()
     if pid == CHILD:
-        # Establish a new session.
-        os.setsid()
         os.close(master_fd)
-
-        # Slave becomes stdin/stdout/stderr of child.
-        os.dup2(slave_fd, STDIN_FILENO)
-        os.dup2(slave_fd, STDOUT_FILENO)
-        os.dup2(slave_fd, STDERR_FILENO)
-        if slave_fd > STDERR_FILENO:
-            os.close(slave_fd)
-
-        # Explicitly open the tty to make it become a controlling tty.
-        tmp_fd = os.open(os.ttyname(STDOUT_FILENO), os.O_RDWR)
-        os.close(tmp_fd)
+        os.login_tty(slave_fd)
     else:
         os.close(slave_fd)
 
@@ -192,7 +186,7 @@ def _copy(master_fd, master_read=_read, stdin_read=_read):
 
 def spawn(argv, master_read=_read, stdin_read=_read):
     """Create a spawned process."""
-    if type(argv) == type(''):
+    if isinstance(argv, str):
         argv = (argv,)
     sys.audit('pty.spawn', argv)
 
diff --git a/contrib/tools/python3/src/Lib/pydoc.py b/contrib/tools/python3/src/Lib/pydoc.py
index 14b99039b3..84bbf588dc 100755
--- a/contrib/tools/python3/src/Lib/pydoc.py
+++ b/contrib/tools/python3/src/Lib/pydoc.py
@@ -389,8 +389,17 @@ def synopsis(filename, cache={}):
 class ErrorDuringImport(Exception):
     """Errors that occurred while trying to import something to document it."""
     def __init__(self, filename, exc_info):
+        if not isinstance(exc_info, tuple):
+            assert isinstance(exc_info, BaseException)
+            self.exc = type(exc_info)
+            self.value = exc_info
+            self.tb = exc_info.__traceback__
+        else:
+            warnings.warn("A tuple value for exc_info is deprecated, use an exception instance",
+                          DeprecationWarning)
+
+            self.exc, self.value, self.tb = exc_info
         self.filename = filename
-        self.exc, self.value, self.tb = exc_info
 
     def __str__(self):
         exc = self.exc.__name__
@@ -411,8 +420,8 @@ def importfile(path):
     spec = importlib.util.spec_from_file_location(name, path, loader=loader)
     try:
         return importlib._bootstrap._load(spec)
-    except:
-        raise ErrorDuringImport(path, sys.exc_info())
+    except BaseException as err:
+        raise ErrorDuringImport(path, err)
 
 def safeimport(path, forceload=0, cache={}):
     """Import a module; handle errors; return None if the module isn't found.
@@ -439,25 +448,21 @@ def safeimport(path, forceload=0, cache={}):
                     # Prevent garbage collection.
                     cache[key] = sys.modules[key]
                     del sys.modules[key]
-        module = __import__(path)
-    except:
+        module = importlib.import_module(path)
+    except BaseException as err:
         # Did the error occur before or after the module was found?
-        (exc, value, tb) = info = sys.exc_info()
         if path in sys.modules:
             # An error occurred while executing the imported module.
-            raise ErrorDuringImport(sys.modules[path].__file__, info)
-        elif exc is SyntaxError:
+            raise ErrorDuringImport(sys.modules[path].__file__, err)
+        elif type(err) is SyntaxError:
             # A SyntaxError occurred before we could execute the module.
-            raise ErrorDuringImport(value.filename, info)
-        elif issubclass(exc, ImportError) and value.name == path:
+            raise ErrorDuringImport(err.filename, err)
+        elif isinstance(err, ImportError) and err.name == path:
             # No such module in the path.
             return None
         else:
             # Some other error occurred during the importing process.
-            raise ErrorDuringImport(path, sys.exc_info())
-    for part in path.split('.')[1:]:
-        try: module = getattr(module, part)
-        except AttributeError: return None
+            raise ErrorDuringImport(path, err)
     return module
 
 # ---------------------------------------------------- formatter base class
@@ -504,7 +509,7 @@ class Doc:
 
         basedir = os.path.normcase(basedir)
         if (isinstance(object, type(os)) and
-            (object.__name__ in ('errno', 'exceptions', 'gc', 'imp',
+            (object.__name__ in ('errno', 'exceptions', 'gc',
                                  'marshal', 'posix', 'signal', 'sys',
                                  '_thread', 'zipimport') or
              (file.startswith(basedir) and
@@ -686,9 +691,7 @@ class HTMLDoc(Doc):
                                 r'RFC[- ]?(\d+)|'
                                 r'PEP[- ]?(\d+)|'
                                 r'(self\.)?(\w+))')
-        while True:
-            match = pattern.search(text, here)
-            if not match: break
+        while match := pattern.search(text, here):
             start, end = match.span()
             results.append(escape(text[here:start]))
 
@@ -723,7 +726,7 @@ class HTMLDoc(Doc):
         """Produce HTML for a class tree as given by inspect.getclasstree()."""
         result = ''
         for entry in tree:
-            if type(entry) is type(()):
+            if isinstance(entry, tuple):
                 c, bases = entry
                 result = result + '<dt class="heading-text">'
                 result = result + self.classlink(c, modname)
@@ -733,7 +736,7 @@ class HTMLDoc(Doc):
                         parents.append(self.classlink(base, modname))
                     result = result + '(' + ', '.join(parents) + ')'
                 result = result + '\n</dt>'
-            elif type(entry) is type([]):
+            elif isinstance(entry, list):
                 result = result + '<dd>\n%s</dd>\n' % self.formattree(
                     entry, modname, c)
         return '<dl>\n%s</dl>\n' % result
@@ -1171,8 +1174,7 @@ class TextDoc(Doc):
     def indent(self, text, prefix='    '):
         """Indent text by prepending a given prefix to each line."""
         if not text: return ''
-        lines = [prefix + line for line in text.split('\n')]
-        if lines: lines[-1] = lines[-1].rstrip()
+        lines = [(prefix + line).rstrip() for line in text.split('\n')]
         return '\n'.join(lines)
 
     def section(self, title, contents):
@@ -1186,14 +1188,14 @@ class TextDoc(Doc):
         """Render in text a class tree as returned by inspect.getclasstree()."""
         result = ''
         for entry in tree:
-            if type(entry) is type(()):
+            if isinstance(entry, tuple):
                 c, bases = entry
                 result = result + prefix + classname(c, modname)
                 if bases and bases != (parent,):
                     parents = (classname(c, modname) for c in bases)
                     result = result + '(%s)' % ', '.join(parents)
                 result = result + '\n'
-            elif type(entry) is type([]):
+            elif isinstance(entry, list):
                 result = result + self.formattree(
                     entry, modname, c, prefix + '    ')
         return result
@@ -2009,8 +2011,8 @@ class Helper:
         if request is not self._GoInteractive:
             try:
                 self.help(request)
-            except ImportError as e:
-                self.output.write(f'{e}\n')
+            except ImportError as err:
+                self.output.write(f'{err}\n')
         else:
             self.intro()
             self.interact()
@@ -2139,7 +2141,7 @@ module "pydoc_data.topics" could not be found.
         if not target:
             self.output.write('no documentation found for %s\n' % repr(topic))
             return
-        if type(target) is type(''):
+        if isinstance(target, str):
             return self.showtopic(target, more_xrefs)
 
         label, xrefs = target
@@ -2248,7 +2250,7 @@ class ModuleScanner:
                 callback(None, modname, '')
             else:
                 try:
-                    spec = pkgutil._get_spec(importer, modname)
+                    spec = importer.find_spec(modname)
                 except SyntaxError:
                     # raised by tests for bad coding cookies or BOM
                     continue
@@ -2419,8 +2421,8 @@ def _start_server(urlhandler, hostname, port):
                 docsvr = DocServer(self.host, self.port, self.ready)
                 self.docserver = docsvr
                 docsvr.serve_until_quit()
-            except Exception as e:
-                self.error = e
+            except Exception as err:
+                self.error = err
 
         def ready(self, server):
             self.serving = True
diff --git a/contrib/tools/python3/src/Lib/pydoc_data/topics.py b/contrib/tools/python3/src/Lib/pydoc_data/topics.py
index d43b5c6b19..e97e543a87 100644
--- a/contrib/tools/python3/src/Lib/pydoc_data/topics.py
+++ b/contrib/tools/python3/src/Lib/pydoc_data/topics.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Autogenerated by Sphinx on Tue Feb  6 21:21:08 2024
+# Autogenerated by Sphinx on Tue Feb  6 21:16:37 2024
 # as part of the release process.
 topics = {'assert': 'The "assert" statement\n'
            '**********************\n'
@@ -539,77 +539,7 @@ topics = {'assert': 'The "assert" statement\n'
           '  **PEP 492** - Coroutines with async and await syntax\n'
           '     The proposal that made coroutines a proper standalone concept '
           'in\n'
-          '     Python, and added supporting syntax.\n'
-          '\n'
-          '-[ Footnotes ]-\n'
-          '\n'
-          '[1] The exception is propagated to the invocation stack unless '
-          'there\n'
-          '    is a "finally" clause which happens to raise another '
-          'exception.\n'
-          '    That new exception causes the old one to be lost.\n'
-          '\n'
-          '[2] In pattern matching, a sequence is defined as one of the\n'
-          '    following:\n'
-          '\n'
-          '    * a class that inherits from "collections.abc.Sequence"\n'
-          '\n'
-          '    * a Python class that has been registered as\n'
-          '      "collections.abc.Sequence"\n'
-          '\n'
-          '    * a builtin class that has its (CPython) "Py_TPFLAGS_SEQUENCE" '
-          'bit\n'
-          '      set\n'
-          '\n'
-          '    * a class that inherits from any of the above\n'
-          '\n'
-          '    The following standard library classes are sequences:\n'
-          '\n'
-          '    * "array.array"\n'
-          '\n'
-          '    * "collections.deque"\n'
-          '\n'
-          '    * "list"\n'
-          '\n'
-          '    * "memoryview"\n'
-          '\n'
-          '    * "range"\n'
-          '\n'
-          '    * "tuple"\n'
-          '\n'
-          '    Note:\n'
-          '\n'
-          '      Subject values of type "str", "bytes", and "bytearray" do '
-          'not\n'
-          '      match sequence patterns.\n'
-          '\n'
-          '[3] In pattern matching, a mapping is defined as one of the '
-          'following:\n'
-          '\n'
-          '    * a class that inherits from "collections.abc.Mapping"\n'
-          '\n'
-          '    * a Python class that has been registered as\n'
-          '      "collections.abc.Mapping"\n'
-          '\n'
-          '    * a builtin class that has its (CPython) "Py_TPFLAGS_MAPPING" '
-          'bit\n'
-          '      set\n'
-          '\n'
-          '    * a class that inherits from any of the above\n'
-          '\n'
-          '    The standard library classes "dict" and '
-          '"types.MappingProxyType"\n'
-          '    are mappings.\n'
-          '\n'
-          '[4] A string literal appearing as the first statement in the '
-          'function\n'
-          '    body is transformed into the function’s "__doc__" attribute '
-          'and\n'
-          '    therefore the function’s *docstring*.\n'
-          '\n'
-          '[5] A string literal appearing as the first statement in the class\n'
-          '    body is transformed into the namespace’s "__doc__" item and\n'
-          '    therefore the class’s *docstring*.\n',
+          '     Python, and added supporting syntax.\n',
  'atom-identifiers': 'Identifiers (Names)\n'
                      '*******************\n'
                      '\n'
@@ -1760,8 +1690,8 @@ topics = {'assert': 'The "assert" statement\n'
           'standard\n'
           'type hierarchy):\n'
           '\n'
-          '   classdef    ::= [decorators] "class" classname [inheritance] ":" '
-          'suite\n'
+          '   classdef    ::= [decorators] "class" classname [type_params] '
+          '[inheritance] ":" suite\n'
           '   inheritance ::= "(" [argument_list] ")"\n'
           '   classname   ::= identifier\n'
           '\n'
@@ -1825,6 +1755,19 @@ topics = {'assert': 'The "assert" statement\n'
           '"assignment_expression". Previously, the grammar was much more\n'
           'restrictive; see **PEP 614** for details.\n'
           '\n'
+          'A list of type parameters may be given in square brackets '
+          'immediately\n'
+          'after the class’s name. This indicates to static type checkers '
+          'that\n'
+          'the class is generic. At runtime, the type parameters can be '
+          'retrieved\n'
+          'from the class’s "__type_params__" attribute. See Generic classes '
+          'for\n'
+          'more.\n'
+          '\n'
+          'Changed in version 3.12: Type parameter lists are new in Python '
+          '3.12.\n'
+          '\n'
           '**Programmer’s note:** Variables defined in the class definition '
           'are\n'
           'class attributes; they are shared by instances.  Instance '
@@ -2585,15 +2528,12 @@ topics = {'assert': 'The "assert" statement\n'
              '\n'
              'Any remaining exceptions that were not handled by any "except*" '
              'clause\n'
-             'are re-raised at the end, combined into an exception group along '
-             'with\n'
-             'all exceptions that were raised from within "except*" clauses.\n'
-             '\n'
-             'From version 3.11.4, when the entire "ExceptionGroup" is handled '
-             'and\n'
-             'only one exception is raised from an "except*" clause, this '
-             'exception\n'
-             'is no longer wrapped to form a new "ExceptionGroup".\n'
+             'are re-raised at the end, along with all exceptions that were '
+             'raised\n'
+             'from within the "except*" clauses. If this list contains more '
+             'than one\n'
+             'exception to reraise, they are combined into an exception '
+             'group.\n'
              '\n'
              'If the raised exception is not an exception group and its type '
              'matches\n'
@@ -3570,8 +3510,8 @@ topics = {'assert': 'The "assert" statement\n'
              '(see\n'
              'section The standard type hierarchy):\n'
              '\n'
-             '   funcdef                   ::= [decorators] "def" funcname "(" '
-             '[parameter_list] ")"\n'
+             '   funcdef                   ::= [decorators] "def" funcname '
+             '[type_params] "(" [parameter_list] ")"\n'
              '               ["->" expression] ":" suite\n'
              '   decorators                ::= decorator+\n'
              '   decorator                 ::= "@" assignment_expression '
@@ -3633,6 +3573,19 @@ topics = {'assert': 'The "assert" statement\n'
              '"assignment_expression". Previously, the grammar was much more\n'
              'restrictive; see **PEP 614** for details.\n'
              '\n'
+             'A list of type parameters may be given in square brackets '
+             'between the\n'
+             'function’s name and the opening parenthesis for its parameter '
+             'list.\n'
+             'This indicates to static type checkers that the function is '
+             'generic.\n'
+             'At runtime, the type parameters can be retrieved from the '
+             'function’s\n'
+             '"__type_params__" attribute. See Generic functions for more.\n'
+             '\n'
+             'Changed in version 3.12: Type parameter lists are new in Python '
+             '3.12.\n'
+             '\n'
              'When one or more *parameters* have the form *parameter* "="\n'
              '*expression*, the function is said to have “default parameter '
              'values.”\n'
@@ -3780,8 +3733,8 @@ topics = {'assert': 'The "assert" statement\n'
              'standard\n'
              'type hierarchy):\n'
              '\n'
-             '   classdef    ::= [decorators] "class" classname [inheritance] '
-             '":" suite\n'
+             '   classdef    ::= [decorators] "class" classname [type_params] '
+             '[inheritance] ":" suite\n'
              '   inheritance ::= "(" [argument_list] ")"\n'
              '   classname   ::= identifier\n'
              '\n'
@@ -3849,6 +3802,19 @@ topics = {'assert': 'The "assert" statement\n'
              '"assignment_expression". Previously, the grammar was much more\n'
              'restrictive; see **PEP 614** for details.\n'
              '\n'
+             'A list of type parameters may be given in square brackets '
+             'immediately\n'
+             'after the class’s name. This indicates to static type checkers '
+             'that\n'
+             'the class is generic. At runtime, the type parameters can be '
+             'retrieved\n'
+             'from the class’s "__type_params__" attribute. See Generic '
+             'classes for\n'
+             'more.\n'
+             '\n'
+             'Changed in version 3.12: Type parameter lists are new in Python '
+             '3.12.\n'
+             '\n'
              '**Programmer’s note:** Variables defined in the class definition '
              'are\n'
              'class attributes; they are shared by instances.  Instance '
@@ -4006,6 +3972,272 @@ topics = {'assert': 'The "assert" statement\n'
              'concept in\n'
              '     Python, and added supporting syntax.\n'
              '\n'
+             '\n'
+             'Type parameter lists\n'
+             '====================\n'
+             '\n'
+             'New in version 3.12.\n'
+             '\n'
+             '   type_params  ::= "[" type_param ("," type_param)* "]"\n'
+             '   type_param   ::= typevar | typevartuple | paramspec\n'
+             '   typevar      ::= identifier (":" expression)?\n'
+             '   typevartuple ::= "*" identifier\n'
+             '   paramspec    ::= "**" identifier\n'
+             '\n'
+             'Functions (including coroutines), classes and type aliases may '
+             'contain\n'
+             'a type parameter list:\n'
+             '\n'
+             '   def max[T](args: list[T]) -> T:\n'
+             '       ...\n'
+             '\n'
+             '   async def amax[T](args: list[T]) -> T:\n'
+             '       ...\n'
+             '\n'
+             '   class Bag[T]:\n'
+             '       def __iter__(self) -> Iterator[T]:\n'
+             '           ...\n'
+             '\n'
+             '       def add(self, arg: T) -> None:\n'
+             '           ...\n'
+             '\n'
+             '   type ListOrSet[T] = list[T] | set[T]\n'
+             '\n'
+             'Semantically, this indicates that the function, class, or type '
+             'alias\n'
+             'is generic over a type variable. This information is primarily '
+             'used by\n'
+             'static type checkers, and at runtime, generic objects behave '
+             'much like\n'
+             'their non-generic counterparts.\n'
+             '\n'
+             'Type parameters are declared in square brackets ("[]") '
+             'immediately\n'
+             'after the name of the function, class, or type alias. The type\n'
+             'parameters are accessible within the scope of the generic '
+             'object, but\n'
+             'not elsewhere. Thus, after a declaration "def func[T](): pass", '
+             'the\n'
+             'name "T" is not available in the module scope. Below, the '
+             'semantics of\n'
+             'generic objects are described with more precision. The scope of '
+             'type\n'
+             'parameters is modeled with a special function (technically, an\n'
+             'annotation scope) that wraps the creation of the generic '
+             'object.\n'
+             '\n'
+             'Generic functions, classes, and type aliases have a '
+             '"__type_params__"\n'
+             'attribute listing their type parameters.\n'
+             '\n'
+             'Type parameters come in three kinds:\n'
+             '\n'
+             '* "typing.TypeVar", introduced by a plain name (e.g., "T").\n'
+             '  Semantically, this represents a single type to a type '
+             'checker.\n'
+             '\n'
+             '* "typing.TypeVarTuple", introduced by a name prefixed with a '
+             'single\n'
+             '  asterisk (e.g., "*Ts"). Semantically, this stands for a tuple '
+             'of any\n'
+             '  number of types.\n'
+             '\n'
+             '* "typing.ParamSpec", introduced by a name prefixed with two '
+             'asterisks\n'
+             '  (e.g., "**P"). Semantically, this stands for the parameters of '
+             'a\n'
+             '  callable.\n'
+             '\n'
+             '"typing.TypeVar" declarations can define *bounds* and '
+             '*constraints*\n'
+             'with a colon (":") followed by an expression. A single '
+             'expression\n'
+             'after the colon indicates a bound (e.g. "T: int"). Semantically, '
+             'this\n'
+             'means that the "typing.TypeVar" can only represent types that '
+             'are a\n'
+             'subtype of this bound. A parenthesized tuple of expressions '
+             'after the\n'
+             'colon indicates a set of constraints (e.g. "T: (str, bytes)"). '
+             'Each\n'
+             'member of the tuple should be a type (again, this is not '
+             'enforced at\n'
+             'runtime). Constrained type variables can only take on one of the '
+             'types\n'
+             'in the list of constraints.\n'
+             '\n'
+             'For "typing.TypeVar"s declared using the type parameter list '
+             'syntax,\n'
+             'the bound and constraints are not evaluated when the generic '
+             'object is\n'
+             'created, but only when the value is explicitly accessed through '
+             'the\n'
+             'attributes "__bound__" and "__constraints__". To accomplish '
+             'this, the\n'
+             'bounds or constraints are evaluated in a separate annotation '
+             'scope.\n'
+             '\n'
+             '"typing.TypeVarTuple"s and "typing.ParamSpec"s cannot have '
+             'bounds or\n'
+             'constraints.\n'
+             '\n'
+             'The following example indicates the full set of allowed type '
+             'parameter\n'
+             'declarations:\n'
+             '\n'
+             '   def overly_generic[\n'
+             '      SimpleTypeVar,\n'
+             '      TypeVarWithBound: int,\n'
+             '      TypeVarWithConstraints: (str, bytes),\n'
+             '      *SimpleTypeVarTuple,\n'
+             '      **SimpleParamSpec,\n'
+             '   ](\n'
+             '      a: SimpleTypeVar,\n'
+             '      b: TypeVarWithBound,\n'
+             '      c: Callable[SimpleParamSpec, TypeVarWithConstraints],\n'
+             '      *d: SimpleTypeVarTuple,\n'
+             '   ): ...\n'
+             '\n'
+             '\n'
+             'Generic functions\n'
+             '-----------------\n'
+             '\n'
+             'Generic functions are declared as follows:\n'
+             '\n'
+             '   def func[T](arg: T): ...\n'
+             '\n'
+             'This syntax is equivalent to:\n'
+             '\n'
+             '   annotation-def TYPE_PARAMS_OF_func():\n'
+             '       T = typing.TypeVar("T")\n'
+             '       def func(arg: T): ...\n'
+             '       func.__type_params__ = (T,)\n'
+             '       return func\n'
+             '   func = TYPE_PARAMS_OF_func()\n'
+             '\n'
+             'Here "annotation-def" indicates an annotation scope, which is '
+             'not\n'
+             'actually bound to any name at runtime. (One other liberty is '
+             'taken in\n'
+             'the translation: the syntax does not go through attribute access '
+             'on\n'
+             'the "typing" module, but creates an instance of '
+             '"typing.TypeVar"\n'
+             'directly.)\n'
+             '\n'
+             'The annotations of generic functions are evaluated within the\n'
+             'annotation scope used for declaring the type parameters, but '
+             'the\n'
+             'function’s defaults and decorators are not.\n'
+             '\n'
+             'The following example illustrates the scoping rules for these '
+             'cases,\n'
+             'as well as for additional flavors of type parameters:\n'
+             '\n'
+             '   @decorator\n'
+             '   def func[T: int, *Ts, **P](*args: *Ts, arg: Callable[P, T] = '
+             'some_default):\n'
+             '       ...\n'
+             '\n'
+             'Except for the lazy evaluation of the "TypeVar" bound, this is\n'
+             'equivalent to:\n'
+             '\n'
+             '   DEFAULT_OF_arg = some_default\n'
+             '\n'
+             '   annotation-def TYPE_PARAMS_OF_func():\n'
+             '\n'
+             '       annotation-def BOUND_OF_T():\n'
+             '           return int\n'
+             '       # In reality, BOUND_OF_T() is evaluated only on demand.\n'
+             '       T = typing.TypeVar("T", bound=BOUND_OF_T())\n'
+             '\n'
+             '       Ts = typing.TypeVarTuple("Ts")\n'
+             '       P = typing.ParamSpec("P")\n'
+             '\n'
+             '       def func(*args: *Ts, arg: Callable[P, T] = '
+             'DEFAULT_OF_arg):\n'
+             '           ...\n'
+             '\n'
+             '       func.__type_params__ = (T, Ts, P)\n'
+             '       return func\n'
+             '   func = decorator(TYPE_PARAMS_OF_func())\n'
+             '\n'
+             'The capitalized names like "DEFAULT_OF_arg" are not actually '
+             'bound at\n'
+             'runtime.\n'
+             '\n'
+             '\n'
+             'Generic classes\n'
+             '---------------\n'
+             '\n'
+             'Generic classes are declared as follows:\n'
+             '\n'
+             '   class Bag[T]: ...\n'
+             '\n'
+             'This syntax is equivalent to:\n'
+             '\n'
+             '   annotation-def TYPE_PARAMS_OF_Bag():\n'
+             '       T = typing.TypeVar("T")\n'
+             '       class Bag(typing.Generic[T]):\n'
+             '           __type_params__ = (T,)\n'
+             '           ...\n'
+             '       return Bag\n'
+             '   Bag = TYPE_PARAMS_OF_Bag()\n'
+             '\n'
+             'Here again "annotation-def" (not a real keyword) indicates an\n'
+             'annotation scope, and the name "TYPE_PARAMS_OF_Bag" is not '
+             'actually\n'
+             'bound at runtime.\n'
+             '\n'
+             'Generic classes implicitly inherit from "typing.Generic". The '
+             'base\n'
+             'classes and keyword arguments of generic classes are evaluated '
+             'within\n'
+             'the type scope for the type parameters, and decorators are '
+             'evaluated\n'
+             'outside that scope. This is illustrated by this example:\n'
+             '\n'
+             '   @decorator\n'
+             '   class Bag(Base[T], arg=T): ...\n'
+             '\n'
+             'This is equivalent to:\n'
+             '\n'
+             '   annotation-def TYPE_PARAMS_OF_Bag():\n'
+             '       T = typing.TypeVar("T")\n'
+             '       class Bag(Base[T], typing.Generic[T], arg=T):\n'
+             '           __type_params__ = (T,)\n'
+             '           ...\n'
+             '       return Bag\n'
+             '   Bag = decorator(TYPE_PARAMS_OF_Bag())\n'
+             '\n'
+             '\n'
+             'Generic type aliases\n'
+             '--------------------\n'
+             '\n'
+             'The "type" statement can also be used to create a generic type '
+             'alias:\n'
+             '\n'
+             '   type ListOrSet[T] = list[T] | set[T]\n'
+             '\n'
+             'Except for the lazy evaluation of the value, this is equivalent '
+             'to:\n'
+             '\n'
+             '   annotation-def TYPE_PARAMS_OF_ListOrSet():\n'
+             '       T = typing.TypeVar("T")\n'
+             '\n'
+             '       annotation-def VALUE_OF_ListOrSet():\n'
+             '           return list[T] | set[T]\n'
+             '       # In reality, the value is lazily evaluated\n'
+             '       return typing.TypeAliasType("ListOrSet", '
+             'VALUE_OF_ListOrSet(), type_params=(T,))\n'
+             '   ListOrSet = TYPE_PARAMS_OF_ListOrSet()\n'
+             '\n'
+             'Here, "annotation-def" (not a real keyword) indicates an '
+             'annotation\n'
+             'scope. The capitalized names like "TYPE_PARAMS_OF_ListOrSet" are '
+             'not\n'
+             'actually bound at runtime.\n'
+             '\n'
              '-[ Footnotes ]-\n'
              '\n'
              '[1] The exception is propagated to the invocation stack unless '
@@ -4953,6 +5185,29 @@ topics = {'assert': 'The "assert" statement\n'
              'implicit\n'
              'string concatenation "\';\'\';\'" or "";"";"".\n'
              '\n'
+             'To set a temporary global variable, use a *convenience '
+             'variable*. A\n'
+             '*convenience variable* is a variable whose name starts with '
+             '"$".  For\n'
+             'example, "$foo = 1" sets a global variable "$foo" which you can '
+             'use in\n'
+             'the debugger session.  The *convenience variables* are cleared '
+             'when\n'
+             'the program resumes execution so it’s less likely to interfere '
+             'with\n'
+             'your program compared to using normal variables like "foo = 1".\n'
+             '\n'
+             'There are three preset *convenience variables*:\n'
+             '\n'
+             '* "$_frame": the current frame you are debugging\n'
+             '\n'
+             '* "$_retval": the return value if the frame is returning\n'
+             '\n'
+             '* "$_exception": the exception if the frame is raising an '
+             'exception\n'
+             '\n'
+             'New in version 3.12.\n'
+             '\n'
              'If a file ".pdbrc" exists in the user’s home directory or in '
              'the\n'
              'current directory, it is read with "\'utf-8\'" encoding and '
@@ -5046,7 +5301,7 @@ topics = {'assert': 'The "assert" statement\n'
              'first\n'
              '   ask confirmation).\n'
              '\n'
-             'disable [bpnumber ...]\n'
+             'disable bpnumber [bpnumber ...]\n'
              '\n'
              '   Disable the breakpoints given as a space separated list of\n'
              '   breakpoint numbers.  Disabling a breakpoint means it cannot '
@@ -5055,7 +5310,7 @@ topics = {'assert': 'The "assert" statement\n'
              'breakpoint, it\n'
              '   remains in the list of breakpoints and can be (re-)enabled.\n'
              '\n'
-             'enable [bpnumber ...]\n'
+             'enable bpnumber [bpnumber ...]\n'
              '\n'
              '   Enable the breakpoints specified.\n'
              '\n'
@@ -5372,11 +5627,14 @@ topics = {'assert': 'The "assert" statement\n'
              'current\n'
              '   stack frame. The exclamation point can be omitted unless the '
              'first\n'
-             '   word of the statement resembles a debugger command.  To set '
-             'a\n'
-             '   global variable, you can prefix the assignment command with '
-             'a\n'
-             '   "global" statement on the same line, e.g.:\n'
+             '   word of the statement resembles a debugger command, e.g.:\n'
+             '\n'
+             '      (Pdb) ! n=42\n'
+             '      (Pdb)\n'
+             '\n'
+             '   To set a global variable, you can prefix the assignment '
+             'command\n'
+             '   with a "global" statement on the same line, e.g.:\n'
              '\n'
              "      (Pdb) global list_options; list_options = ['-l']\n"
              '      (Pdb)\n'
@@ -5688,6 +5946,10 @@ topics = {'assert': 'The "assert" statement\n'
               '\n'
               '* "import" statements.\n'
               '\n'
+              '* "type" statements.\n'
+              '\n'
+              '* type parameter lists.\n'
+              '\n'
               'The "import" statement of the form "from ... import *" binds '
               'all names\n'
               'defined in the imported module, except those beginning with an\n'
@@ -5794,7 +6056,9 @@ topics = {'assert': 'The "assert" statement\n'
               'scope.\n'
               '"SyntaxError" is raised at compile time if the given name does '
               'not\n'
-              'exist in any enclosing function scope.\n'
+              'exist in any enclosing function scope. Type parameters cannot '
+              'be\n'
+              'rebound with the "nonlocal" statement.\n'
               '\n'
               'The namespace for a module is automatically created the first '
               'time a\n'
@@ -5817,17 +6081,162 @@ topics = {'assert': 'The "assert" statement\n'
               'the class. The scope of names defined in a class block is '
               'limited to\n'
               'the class block; it does not extend to the code blocks of '
-              'methods –\n'
-              'this includes comprehensions and generator expressions since '
-              'they are\n'
-              'implemented using a function scope.  This means that the '
-              'following\n'
-              'will fail:\n'
+              'methods.\n'
+              'This includes comprehensions and generator expressions, but it '
+              'does\n'
+              'not include annotation scopes, which have access to their '
+              'enclosing\n'
+              'class scopes. This means that the following will fail:\n'
               '\n'
               '   class A:\n'
               '       a = 42\n'
               '       b = list(a + i for i in range(10))\n'
               '\n'
+              'However, the following will succeed:\n'
+              '\n'
+              '   class A:\n'
+              '       type Alias = Nested\n'
+              '       class Nested: pass\n'
+              '\n'
+              "   print(A.Alias.__value__)  # <type 'A.Nested'>\n"
+              '\n'
+              '\n'
+              'Annotation scopes\n'
+              '-----------------\n'
+              '\n'
+              'Type parameter lists and "type" statements introduce '
+              '*annotation\n'
+              'scopes*, which behave mostly like function scopes, but with '
+              'some\n'
+              'exceptions discussed below. *Annotations* currently do not use\n'
+              'annotation scopes, but they are expected to use annotation '
+              'scopes in\n'
+              'Python 3.13 when **PEP 649** is implemented.\n'
+              '\n'
+              'Annotation scopes are used in the following contexts:\n'
+              '\n'
+              '* Type parameter lists for generic type aliases.\n'
+              '\n'
+              '* Type parameter lists for generic functions. A generic '
+              'function’s\n'
+              '  annotations are executed within the annotation scope, but '
+              'its\n'
+              '  defaults and decorators are not.\n'
+              '\n'
+              '* Type parameter lists for generic classes. A generic class’s '
+              'base\n'
+              '  classes and keyword arguments are executed within the '
+              'annotation\n'
+              '  scope, but its decorators are not.\n'
+              '\n'
+              '* The bounds and constraints for type variables (lazily '
+              'evaluated).\n'
+              '\n'
+              '* The value of type aliases (lazily evaluated).\n'
+              '\n'
+              'Annotation scopes differ from function scopes in the following '
+              'ways:\n'
+              '\n'
+              '* Annotation scopes have access to their enclosing class '
+              'namespace. If\n'
+              '  an annotation scope is immediately within a class scope, or '
+              'within\n'
+              '  another annotation scope that is immediately within a class '
+              'scope,\n'
+              '  the code in the annotation scope can use names defined in the '
+              'class\n'
+              '  scope as if it were executed directly within the class body. '
+              'This\n'
+              '  contrasts with regular functions defined within classes, '
+              'which\n'
+              '  cannot access names defined in the class scope.\n'
+              '\n'
+              '* Expressions in annotation scopes cannot contain "yield", '
+              '"yield\n'
+              '  from", "await", or ":=" expressions. (These expressions are '
+              'allowed\n'
+              '  in other scopes contained within the annotation scope.)\n'
+              '\n'
+              '* Names defined in annotation scopes cannot be rebound with '
+              '"nonlocal"\n'
+              '  statements in inner scopes. This includes only type '
+              'parameters, as\n'
+              '  no other syntactic elements that can appear within annotation '
+              'scopes\n'
+              '  can introduce new names.\n'
+              '\n'
+              '* While annotation scopes have an internal name, that name is '
+              'not\n'
+              '  reflected in the *__qualname__* of objects defined within the '
+              'scope.\n'
+              '  Instead, the "__qualname__" of such objects is as if the '
+              'object were\n'
+              '  defined in the enclosing scope.\n'
+              '\n'
+              'New in version 3.12: Annotation scopes were introduced in '
+              'Python 3.12\n'
+              'as part of **PEP 695**.\n'
+              '\n'
+              '\n'
+              'Lazy evaluation\n'
+              '---------------\n'
+              '\n'
+              'The values of type aliases created through the "type" statement '
+              'are\n'
+              '*lazily evaluated*. The same applies to the bounds and '
+              'constraints of\n'
+              'type variables created through the type parameter syntax. This '
+              'means\n'
+              'that they are not evaluated when the type alias or type '
+              'variable is\n'
+              'created. Instead, they are only evaluated when doing so is '
+              'necessary\n'
+              'to resolve an attribute access.\n'
+              '\n'
+              'Example:\n'
+              '\n'
+              '   >>> type Alias = 1/0\n'
+              '   >>> Alias.__value__\n'
+              '   Traceback (most recent call last):\n'
+              '     ...\n'
+              '   ZeroDivisionError: division by zero\n'
+              '   >>> def func[T: 1/0](): pass\n'
+              '   >>> T = func.__type_params__[0]\n'
+              '   >>> T.__bound__\n'
+              '   Traceback (most recent call last):\n'
+              '     ...\n'
+              '   ZeroDivisionError: division by zero\n'
+              '\n'
+              'Here the exception is raised only when the "__value__" '
+              'attribute of\n'
+              'the type alias or the "__bound__" attribute of the type '
+              'variable is\n'
+              'accessed.\n'
+              '\n'
+              'This behavior is primarily useful for references to types that '
+              'have\n'
+              'not yet been defined when the type alias or type variable is '
+              'created.\n'
+              'For example, lazy evaluation enables creation of mutually '
+              'recursive\n'
+              'type aliases:\n'
+              '\n'
+              '   from typing import Literal\n'
+              '\n'
+              '   type SimpleExpr = int | Parenthesized\n'
+              '   type Parenthesized = tuple[Literal["("], Expr, '
+              'Literal[")"]]\n'
+              '   type Expr = SimpleExpr | tuple[SimpleExpr, Literal["+", '
+              '"-"], Expr]\n'
+              '\n'
+              'Lazily evaluated values are evaluated in annotation scope, '
+              'which means\n'
+              'that names that appear inside the lazily evaluated value are '
+              'looked up\n'
+              'as if they were used in the immediately enclosing scope.\n'
+              '\n'
+              'New in version 3.12.\n'
+              '\n'
               '\n'
               'Builtins and restricted execution\n'
               '---------------------------------\n'
@@ -6859,8 +7268,8 @@ topics = {'assert': 'The "assert" statement\n'
              '(see\n'
              'section The standard type hierarchy):\n'
              '\n'
-             '   funcdef                   ::= [decorators] "def" funcname "(" '
-             '[parameter_list] ")"\n'
+             '   funcdef                   ::= [decorators] "def" funcname '
+             '[type_params] "(" [parameter_list] ")"\n'
              '               ["->" expression] ":" suite\n'
              '   decorators                ::= decorator+\n'
              '   decorator                 ::= "@" assignment_expression '
@@ -6922,6 +7331,19 @@ topics = {'assert': 'The "assert" statement\n'
              '"assignment_expression". Previously, the grammar was much more\n'
              'restrictive; see **PEP 614** for details.\n'
              '\n'
+             'A list of type parameters may be given in square brackets '
+             'between the\n'
+             'function’s name and the opening parenthesis for its parameter '
+             'list.\n'
+             'This indicates to static type checkers that the function is '
+             'generic.\n'
+             'At runtime, the type parameters can be retrieved from the '
+             'function’s\n'
+             '"__type_params__" attribute. See Generic functions for more.\n'
+             '\n'
+             'Changed in version 3.12: Type parameter lists are new in Python '
+             '3.12.\n'
+             '\n'
              'When one or more *parameters* have the form *parameter* "="\n'
              '*expression*, the function is said to have “default parameter '
              'values.”\n'
@@ -7240,8 +7662,8 @@ topics = {'assert': 'The "assert" statement\n'
                 '\n'
                 'A non-normative HTML file listing all valid identifier '
                 'characters for\n'
-                'Unicode 14.0.0 can be found at\n'
-                'https://www.unicode.org/Public/14.0.0/ucd/DerivedCoreProperties.txt\n'
+                'Unicode 15.0.0 can be found at\n'
+                'https://www.unicode.org/Public/15.0.0/ucd/DerivedCoreProperties.txt\n'
                 '\n'
                 '\n'
                 'Keywords\n'
@@ -7269,19 +7691,24 @@ topics = {'assert': 'The "assert" statement\n'
                 '\n'
                 'Some identifiers are only reserved under specific contexts. '
                 'These are\n'
-                'known as *soft keywords*.  The identifiers "match", "case" '
-                'and "_" can\n'
-                'syntactically act as keywords in contexts related to the '
-                'pattern\n'
-                'matching statement, but this distinction is done at the '
-                'parser level,\n'
-                'not when tokenizing.\n'
+                'known as *soft keywords*.  The identifiers "match", "case", '
+                '"type" and\n'
+                '"_" can syntactically act as keywords in certain contexts, '
+                'but this\n'
+                'distinction is done at the parser level, not when '
+                'tokenizing.\n'
+                '\n'
+                'As soft keywords, their use in the grammar is possible while '
+                'still\n'
+                'preserving compatibility with existing code that uses these '
+                'names as\n'
+                'identifier names.\n'
                 '\n'
-                'As soft keywords, their use with pattern matching is possible '
-                'while\n'
-                'still preserving compatibility with existing code that uses '
-                '"match",\n'
-                '"case" and "_" as identifier names.\n'
+                '"match", "case", and "_" are used in the "match" statement. '
+                '"type" is\n'
+                'used in the "type" statement.\n'
+                '\n'
+                'Changed in version 3.12: "type" is now a soft keyword.\n'
                 '\n'
                 '\n'
                 'Reserved classes of identifiers\n'
@@ -7801,6 +8228,10 @@ topics = {'assert': 'The "assert" statement\n'
            '\n'
            '* "import" statements.\n'
            '\n'
+           '* "type" statements.\n'
+           '\n'
+           '* type parameter lists.\n'
+           '\n'
            'The "import" statement of the form "from ... import *" binds all '
            'names\n'
            'defined in the imported module, except those beginning with an\n'
@@ -7900,7 +8331,8 @@ topics = {'assert': 'The "assert" statement\n'
            'scope.\n'
            '"SyntaxError" is raised at compile time if the given name does '
            'not\n'
-           'exist in any enclosing function scope.\n'
+           'exist in any enclosing function scope. Type parameters cannot be\n'
+           'rebound with the "nonlocal" statement.\n'
            '\n'
            'The namespace for a module is automatically created the first time '
            'a\n'
@@ -7922,18 +8354,156 @@ topics = {'assert': 'The "assert" statement\n'
            'of\n'
            'the class. The scope of names defined in a class block is limited '
            'to\n'
-           'the class block; it does not extend to the code blocks of methods '
-           '–\n'
-           'this includes comprehensions and generator expressions since they '
-           'are\n'
-           'implemented using a function scope.  This means that the '
-           'following\n'
-           'will fail:\n'
+           'the class block; it does not extend to the code blocks of '
+           'methods.\n'
+           'This includes comprehensions and generator expressions, but it '
+           'does\n'
+           'not include annotation scopes, which have access to their '
+           'enclosing\n'
+           'class scopes. This means that the following will fail:\n'
            '\n'
            '   class A:\n'
            '       a = 42\n'
            '       b = list(a + i for i in range(10))\n'
            '\n'
+           'However, the following will succeed:\n'
+           '\n'
+           '   class A:\n'
+           '       type Alias = Nested\n'
+           '       class Nested: pass\n'
+           '\n'
+           "   print(A.Alias.__value__)  # <type 'A.Nested'>\n"
+           '\n'
+           '\n'
+           'Annotation scopes\n'
+           '=================\n'
+           '\n'
+           'Type parameter lists and "type" statements introduce *annotation\n'
+           'scopes*, which behave mostly like function scopes, but with some\n'
+           'exceptions discussed below. *Annotations* currently do not use\n'
+           'annotation scopes, but they are expected to use annotation scopes '
+           'in\n'
+           'Python 3.13 when **PEP 649** is implemented.\n'
+           '\n'
+           'Annotation scopes are used in the following contexts:\n'
+           '\n'
+           '* Type parameter lists for generic type aliases.\n'
+           '\n'
+           '* Type parameter lists for generic functions. A generic '
+           'function’s\n'
+           '  annotations are executed within the annotation scope, but its\n'
+           '  defaults and decorators are not.\n'
+           '\n'
+           '* Type parameter lists for generic classes. A generic class’s '
+           'base\n'
+           '  classes and keyword arguments are executed within the '
+           'annotation\n'
+           '  scope, but its decorators are not.\n'
+           '\n'
+           '* The bounds and constraints for type variables (lazily '
+           'evaluated).\n'
+           '\n'
+           '* The value of type aliases (lazily evaluated).\n'
+           '\n'
+           'Annotation scopes differ from function scopes in the following '
+           'ways:\n'
+           '\n'
+           '* Annotation scopes have access to their enclosing class '
+           'namespace. If\n'
+           '  an annotation scope is immediately within a class scope, or '
+           'within\n'
+           '  another annotation scope that is immediately within a class '
+           'scope,\n'
+           '  the code in the annotation scope can use names defined in the '
+           'class\n'
+           '  scope as if it were executed directly within the class body. '
+           'This\n'
+           '  contrasts with regular functions defined within classes, which\n'
+           '  cannot access names defined in the class scope.\n'
+           '\n'
+           '* Expressions in annotation scopes cannot contain "yield", "yield\n'
+           '  from", "await", or ":=" expressions. (These expressions are '
+           'allowed\n'
+           '  in other scopes contained within the annotation scope.)\n'
+           '\n'
+           '* Names defined in annotation scopes cannot be rebound with '
+           '"nonlocal"\n'
+           '  statements in inner scopes. This includes only type parameters, '
+           'as\n'
+           '  no other syntactic elements that can appear within annotation '
+           'scopes\n'
+           '  can introduce new names.\n'
+           '\n'
+           '* While annotation scopes have an internal name, that name is not\n'
+           '  reflected in the *__qualname__* of objects defined within the '
+           'scope.\n'
+           '  Instead, the "__qualname__" of such objects is as if the object '
+           'were\n'
+           '  defined in the enclosing scope.\n'
+           '\n'
+           'New in version 3.12: Annotation scopes were introduced in Python '
+           '3.12\n'
+           'as part of **PEP 695**.\n'
+           '\n'
+           '\n'
+           'Lazy evaluation\n'
+           '===============\n'
+           '\n'
+           'The values of type aliases created through the "type" statement '
+           'are\n'
+           '*lazily evaluated*. The same applies to the bounds and constraints '
+           'of\n'
+           'type variables created through the type parameter syntax. This '
+           'means\n'
+           'that they are not evaluated when the type alias or type variable '
+           'is\n'
+           'created. Instead, they are only evaluated when doing so is '
+           'necessary\n'
+           'to resolve an attribute access.\n'
+           '\n'
+           'Example:\n'
+           '\n'
+           '   >>> type Alias = 1/0\n'
+           '   >>> Alias.__value__\n'
+           '   Traceback (most recent call last):\n'
+           '     ...\n'
+           '   ZeroDivisionError: division by zero\n'
+           '   >>> def func[T: 1/0](): pass\n'
+           '   >>> T = func.__type_params__[0]\n'
+           '   >>> T.__bound__\n'
+           '   Traceback (most recent call last):\n'
+           '     ...\n'
+           '   ZeroDivisionError: division by zero\n'
+           '\n'
+           'Here the exception is raised only when the "__value__" attribute '
+           'of\n'
+           'the type alias or the "__bound__" attribute of the type variable '
+           'is\n'
+           'accessed.\n'
+           '\n'
+           'This behavior is primarily useful for references to types that '
+           'have\n'
+           'not yet been defined when the type alias or type variable is '
+           'created.\n'
+           'For example, lazy evaluation enables creation of mutually '
+           'recursive\n'
+           'type aliases:\n'
+           '\n'
+           '   from typing import Literal\n'
+           '\n'
+           '   type SimpleExpr = int | Parenthesized\n'
+           '   type Parenthesized = tuple[Literal["("], Expr, Literal[")"]]\n'
+           '   type Expr = SimpleExpr | tuple[SimpleExpr, Literal["+", "-"], '
+           'Expr]\n'
+           '\n'
+           'Lazily evaluated values are evaluated in annotation scope, which '
+           'means\n'
+           'that names that appear inside the lazily evaluated value are '
+           'looked up\n'
+           'as if they were used in the immediately enclosing scope.\n'
+           '\n'
+           'New in version 3.12.\n'
+           '\n'
            '\n'
            'Builtins and restricted execution\n'
            '=================================\n'
@@ -9098,6 +9668,14 @@ topics = {'assert': 'The "assert" statement\n'
                  '\n'
                  '   New in version 3.3.\n'
                  '\n'
+                 'definition.__type_params__\n'
+                 '\n'
+                 '   The type parameters of generic classes, functions, and '
+                 'type\n'
+                 '   aliases.\n'
+                 '\n'
+                 '   New in version 3.12.\n'
+                 '\n'
                  'class.__mro__\n'
                  '\n'
                  '   This attribute is a tuple of classes that are considered '
@@ -10277,6 +10855,11 @@ topics = {'assert': 'The "assert" statement\n'
                  '     Dynamically resolve bases that are not instances of '
                  '"type".\n'
                  '\n'
+                 '  "types.get_original_bases()"\n'
+                 '     Retrieve a class’s “original bases” prior to '
+                 'modifications by\n'
+                 '     "__mro_entries__()".\n'
+                 '\n'
                  '  **PEP 560**\n'
                  '     Core support for typing module and generic types.\n'
                  '\n'
@@ -11252,6 +11835,61 @@ topics = {'assert': 'The "assert" statement\n'
                  '     The specification for the Python "match" statement.\n'
                  '\n'
                  '\n'
+                 'Emulating buffer types\n'
+                 '======================\n'
+                 '\n'
+                 'The buffer protocol provides a way for Python objects to '
+                 'expose\n'
+                 'efficient access to a low-level memory array. This protocol '
+                 'is\n'
+                 'implemented by builtin types such as "bytes" and '
+                 '"memoryview", and\n'
+                 'third-party libraries may define additional buffer types.\n'
+                 '\n'
+                 'While buffer types are usually implemented in C, it is also '
+                 'possible\n'
+                 'to implement the protocol in Python.\n'
+                 '\n'
+                 'object.__buffer__(self, flags)\n'
+                 '\n'
+                 '   Called when a buffer is requested from *self* (for '
+                 'example, by the\n'
+                 '   "memoryview" constructor). The *flags* argument is an '
+                 'integer\n'
+                 '   representing the kind of buffer requested, affecting for '
+                 'example\n'
+                 '   whether the returned buffer is read-only or writable.\n'
+                 '   "inspect.BufferFlags" provides a convenient way to '
+                 'interpret the\n'
+                 '   flags. The method must return a "memoryview" object.\n'
+                 '\n'
+                 'object.__release_buffer__(self, buffer)\n'
+                 '\n'
+                 '   Called when a buffer is no longer needed. The *buffer* '
+                 'argument is\n'
+                 '   a "memoryview" object that was previously returned by\n'
+                 '   "__buffer__()". The method must release any resources '
+                 'associated\n'
+                 '   with the buffer. This method should return "None". Buffer '
+                 'objects\n'
+                 '   that do not need to perform any cleanup are not required '
+                 'to\n'
+                 '   implement this method.\n'
+                 '\n'
+                 'New in version 3.12.\n'
+                 '\n'
+                 'See also:\n'
+                 '\n'
+                 '  **PEP 688** - Making the buffer protocol accessible in '
+                 'Python\n'
+                 '     Introduces the Python "__buffer__" and '
+                 '"__release_buffer__"\n'
+                 '     methods.\n'
+                 '\n'
+                 '  "collections.abc.Buffer"\n'
+                 '     ABC for buffer types.\n'
+                 '\n'
+                 '\n'
                  'Special method lookup\n'
                  '=====================\n'
                  '\n'
@@ -11399,8 +12037,8 @@ topics = {'assert': 'The "assert" statement\n'
                    '   "casefold()" converts it to ""ss"".\n'
                    '\n'
                    '   The casefolding algorithm is described in section 3.13 '
-                   'of the\n'
-                   '   Unicode Standard.\n'
+                   '‘Default\n'
+                   '   Case Folding’ of the Unicode Standard.\n'
                    '\n'
                    '   New in version 3.3.\n'
                    '\n'
@@ -11617,9 +12255,10 @@ topics = {'assert': 'The "assert" statement\n'
                    'property\n'
                    '   being one of “Lm”, “Lt”, “Lu”, “Ll”, or “Lo”.  Note '
                    'that this is\n'
-                   '   different from the “Alphabetic” property defined in the '
-                   'Unicode\n'
-                   '   Standard.\n'
+                   '   different from the Alphabetic property defined in the '
+                   'section 4.10\n'
+                   '   ‘Letters, Alphabetic, and Ideographic’ of the Unicode '
+                   'Standard.\n'
                    '\n'
                    'str.isascii()\n'
                    '\n'
@@ -11666,9 +12305,9 @@ topics = {'assert': 'The "assert" statement\n'
                    'according to the\n'
                    '   language definition, section Identifiers and keywords.\n'
                    '\n'
-                   '   Call "keyword.iskeyword()" to test whether string "s" '
-                   'is a reserved\n'
-                   '   identifier, such as "def" and "class".\n'
+                   '   "keyword.iskeyword()" can be used to test whether '
+                   'string "s" is a\n'
+                   '   reserved identifier, such as "def" and "class".\n'
                    '\n'
                    '   Example:\n'
                    '\n'
@@ -11791,8 +12430,8 @@ topics = {'assert': 'The "assert" statement\n'
                    '   converted to lowercase.\n'
                    '\n'
                    '   The lowercasing algorithm used is described in section '
-                   '3.13 of the\n'
-                   '   Unicode Standard.\n'
+                   '3.13\n'
+                   '   ‘Default Case Folding’ of the Unicode Standard.\n'
                    '\n'
                    'str.lstrip([chars])\n'
                    '\n'
@@ -12258,8 +12897,8 @@ topics = {'assert': 'The "assert" statement\n'
                    '   uppercase), but e.g. “Lt” (Letter, titlecase).\n'
                    '\n'
                    '   The uppercasing algorithm used is described in section '
-                   '3.13 of the\n'
-                   '   Unicode Standard.\n'
+                   '3.13\n'
+                   '   ‘Default Case Folding’ of the Unicode Standard.\n'
                    '\n'
                    'str.zfill(width)\n'
                    '\n'
@@ -12328,12 +12967,15 @@ topics = {'assert': 'The "assert" statement\n'
             'single quotes ("\'") or double quotes (""").  They can also be '
             'enclosed\n'
             'in matching groups of three single or double quotes (these are\n'
-            'generally referred to as *triple-quoted strings*).  The '
-            'backslash\n'
-            '("\\") character is used to escape characters that otherwise have '
-            'a\n'
-            'special meaning, such as newline, backslash itself, or the quote\n'
+            'generally referred to as *triple-quoted strings*). The backslash '
+            '("\\")\n'
+            'character is used to give special meaning to otherwise ordinary\n'
+            'characters like "n", which means ‘newline’ when escaped ("\\n"). '
+            'It can\n'
+            'also be used to escape characters that otherwise have a special\n'
+            'meaning, such as newline, backslash itself, or the quote '
             'character.\n'
+            'See escape sequences below for examples.\n'
             '\n'
             'Bytes literals are always prefixed with "\'b\'" or "\'B\'"; they '
             'produce\n'
@@ -12472,10 +13114,12 @@ topics = {'assert': 'The "assert" statement\n'
             '2. As in Standard C, up to three octal digits are accepted.\n'
             '\n'
             '   Changed in version 3.11: Octal escapes with value larger than\n'
-            '   "0o377" produce a "DeprecationWarning". In a future Python '
-            'version\n'
-            '   they will be a "SyntaxWarning" and eventually a '
-            '"SyntaxError".\n'
+            '   "0o377" produce a "DeprecationWarning".\n'
+            '\n'
+            '   Changed in version 3.12: Octal escapes with value larger than\n'
+            '   "0o377" produce a "SyntaxWarning". In a future Python version '
+            'they\n'
+            '   will be eventually a "SyntaxError".\n'
             '\n'
             '3. Unlike in Standard C, exactly two hex digits are required.\n'
             '\n'
@@ -12509,8 +13153,12 @@ topics = {'assert': 'The "assert" statement\n'
             'literals.\n'
             '\n'
             'Changed in version 3.6: Unrecognized escape sequences produce a\n'
-            '"DeprecationWarning".  In a future Python version they will be a\n'
-            '"SyntaxWarning" and eventually a "SyntaxError".\n'
+            '"DeprecationWarning".\n'
+            '\n'
+            'Changed in version 3.12: Unrecognized escape sequences produce a\n'
+            '"SyntaxWarning". In a future Python version they will be '
+            'eventually a\n'
+            '"SyntaxError".\n'
             '\n'
             'Even in a raw literal, quotes can be escaped with a backslash, '
             'but the\n'
@@ -12795,14 +13443,10 @@ topics = {'assert': 'The "assert" statement\n'
         '\n'
         'Any remaining exceptions that were not handled by any "except*" '
         'clause\n'
-        'are re-raised at the end, combined into an exception group along '
-        'with\n'
-        'all exceptions that were raised from within "except*" clauses.\n'
-        '\n'
-        'From version 3.11.4, when the entire "ExceptionGroup" is handled and\n'
-        'only one exception is raised from an "except*" clause, this '
-        'exception\n'
-        'is no longer wrapped to form a new "ExceptionGroup".\n'
+        'are re-raised at the end, along with all exceptions that were raised\n'
+        'from within the "except*" clauses. If this list contains more than '
+        'one\n'
+        'exception to reraise, they are combined into an exception group.\n'
         '\n'
         'If the raised exception is not an exception group and its type '
         'matches\n'
@@ -13362,6 +14006,11 @@ topics = {'assert': 'The "assert" statement\n'
           '|                                                    | only '
           '*parameters*.                                 |\n'
           '+----------------------------------------------------+----------------------------------------------------+\n'
+          '| function.__type_params__                           | A "tuple" '
+          'containing the type parameters of a      |\n'
+          '|                                                    | generic '
+          'function.  New in version 3.12.            |\n'
+          '+----------------------------------------------------+----------------------------------------------------+\n'
           '\n'
           'Function objects also support getting and setting arbitrary\n'
           'attributes, which can be used, for example, to attach metadata to\n'
@@ -13713,6 +14362,9 @@ topics = {'assert': 'The "assert" statement\n'
           '      class body execution.  For best practices on working with\n'
           '      "__annotations__", please see Annotations Best Practices.\n'
           '\n'
+          '   "__type_params__"\n'
+          '      A tuple containing the type parameters of a generic class.\n'
+          '\n'
           '\n'
           'Class instances\n'
           '===============\n'
@@ -13886,7 +14538,11 @@ topics = {'assert': 'The "assert" statement\n'
           '|                                                    | offsets to '
           'line numbers. For details, see the      |\n'
           '|                                                    | source code '
-          'of the interpreter.                    |\n'
+          'of the interpreter.  Deprecated since  |\n'
+          '|                                                    | version '
+          '3.12: This attribute of code objects is    |\n'
+          '|                                                    | deprecated, '
+          'and may be removed in Python 3.14.     |\n'
           '+----------------------------------------------------+----------------------------------------------------+\n'
           '| codeobject.co_stacksize                            | The required '
           'stack size of the code object         |\n'
@@ -14415,6 +15071,7 @@ topics = {'assert': 'The "assert" statement\n'
                  '         >>> class Counter(dict):\n'
                  '         ...     def __missing__(self, key):\n'
                  '         ...         return 0\n'
+                 '         ...\n'
                  '         >>> c = Counter()\n'
                  "         >>> c['red']\n"
                  '         0\n'
@@ -14714,17 +15371,23 @@ topics = {'assert': 'The "assert" statement\n'
                  '\n'
                  'Keys views are set-like since their entries are unique and '
                  '*hashable*.\n'
-                 'If all values are hashable, so that "(key, value)" pairs are '
-                 'unique\n'
-                 'and hashable, then the items view is also set-like.  (Values '
-                 'views are\n'
-                 'not treated as set-like since the entries are generally not '
-                 'unique.)\n'
-                 'For set-like views, all of the operations defined for the '
-                 'abstract\n'
-                 'base class "collections.abc.Set" are available (for example, '
-                 '"==",\n'
-                 '"<", or "^").\n'
+                 'Items views also have set-like operations since the (key, '
+                 'value) pairs\n'
+                 'are unique and the keys are hashable. If all values in an '
+                 'items view\n'
+                 'are hashable as well, then the items view can interoperate '
+                 'with other\n'
+                 'sets. (Values views are not treated as set-like since the '
+                 'entries are\n'
+                 'generally not unique.)  For set-like views, all of the '
+                 'operations\n'
+                 'defined for the abstract base class "collections.abc.Set" '
+                 'are\n'
+                 'available (for example, "==", "<", or "^").  While using '
+                 'set\n'
+                 'operators, set-like views accept any iterable as the other '
+                 'operand,\n'
+                 'unlike sets which only accept sets as the input.\n'
                  '\n'
                  'An example of dictionary view usage:\n'
                  '\n'
@@ -14737,6 +15400,7 @@ topics = {'assert': 'The "assert" statement\n'
                  '   >>> n = 0\n'
                  '   >>> for val in values:\n'
                  '   ...     n += val\n'
+                 '   ...\n'
                  '   >>> print(n)\n'
                  '   504\n'
                  '\n'
diff --git a/contrib/tools/python3/src/Lib/quopri.py b/contrib/tools/python3/src/Lib/quopri.py
index 08899c5cb7..f36cf7b395 100755
--- a/contrib/tools/python3/src/Lib/quopri.py
+++ b/contrib/tools/python3/src/Lib/quopri.py
@@ -67,10 +67,7 @@ def encode(input, output, quotetabs, header=False):
             output.write(s + lineEnd)
 
     prevline = None
-    while 1:
-        line = input.readline()
-        if not line:
-            break
+    while line := input.readline():
         outline = []
         # Strip off any readline induced trailing newline
         stripped = b''
@@ -126,9 +123,7 @@ def decode(input, output, header=False):
         return
 
     new = b''
-    while 1:
-        line = input.readline()
-        if not line: break
+    while line := input.readline():
         i, n = 0, len(line)
         if n > 0 and line[n-1:n] == b'\n':
             partial = 0; n = n-1
diff --git a/contrib/tools/python3/src/Lib/random.py b/contrib/tools/python3/src/Lib/random.py
index d07fffba60..1cfc2ba2f0 100644
--- a/contrib/tools/python3/src/Lib/random.py
+++ b/contrib/tools/python3/src/Lib/random.py
@@ -32,6 +32,11 @@
            circular uniform
            von Mises
 
+    discrete distributions
+    ----------------------
+           binomial
+
+
 General notes on the underlying Mersenne Twister core generator:
 
 * The period is 2**19937-1.
@@ -49,8 +54,9 @@ from warnings import warn as _warn
 from math import log as _log, exp as _exp, pi as _pi, e as _e, ceil as _ceil
 from math import sqrt as _sqrt, acos as _acos, cos as _cos, sin as _sin
 from math import tau as TWOPI, floor as _floor, isfinite as _isfinite
+from math import lgamma as _lgamma, fabs as _fabs, log2 as _log2
 from os import urandom as _urandom
-from _collections_abc import Set as _Set, Sequence as _Sequence
+from _collections_abc import Sequence as _Sequence
 from operator import index as _index
 from itertools import accumulate as _accumulate, repeat as _repeat
 from bisect import bisect as _bisect
@@ -59,7 +65,7 @@ import _random
 
 try:
     # hashlib is pretty heavy to load, try lean internal module first
-    from _sha512 import sha512 as _sha512
+    from _sha2 import sha512 as _sha512
 except ImportError:
     # fallback to official implementation
     from hashlib import sha512 as _sha512
@@ -68,6 +74,7 @@ __all__ = [
     "Random",
     "SystemRandom",
     "betavariate",
+    "binomialvariate",
     "choice",
     "choices",
     "expovariate",
@@ -236,7 +243,7 @@ class Random(_random.Random):
         "Return a random int in the range [0,n).  Defined for n > 0."
 
         getrandbits = self.getrandbits
-        k = n.bit_length()  # don't use (n-1) here because n can be 1
+        k = n.bit_length()
         r = getrandbits(k)  # 0 <= r < 2**k
         while r >= n:
             r = getrandbits(k)
@@ -291,58 +298,25 @@ class Random(_random.Random):
 
         # This code is a bit messy to make it fast for the
         # common case while still doing adequate error checking.
-        try:
-            istart = _index(start)
-        except TypeError:
-            istart = int(start)
-            if istart != start:
-                _warn('randrange() will raise TypeError in the future',
-                      DeprecationWarning, 2)
-                raise ValueError("non-integer arg 1 for randrange()")
-            _warn('non-integer arguments to randrange() have been deprecated '
-                  'since Python 3.10 and will be removed in a subsequent '
-                  'version',
-                  DeprecationWarning, 2)
+        istart = _index(start)
         if stop is None:
             # We don't check for "step != 1" because it hasn't been
             # type checked and converted to an integer yet.
             if step is not _ONE:
-                raise TypeError('Missing a non-None stop argument')
+                raise TypeError("Missing a non-None stop argument")
             if istart > 0:
                 return self._randbelow(istart)
             raise ValueError("empty range for randrange()")
 
-        # stop argument supplied.
-        try:
-            istop = _index(stop)
-        except TypeError:
-            istop = int(stop)
-            if istop != stop:
-                _warn('randrange() will raise TypeError in the future',
-                      DeprecationWarning, 2)
-                raise ValueError("non-integer stop for randrange()")
-            _warn('non-integer arguments to randrange() have been deprecated '
-                  'since Python 3.10 and will be removed in a subsequent '
-                  'version',
-                  DeprecationWarning, 2)
+        # Stop argument supplied.
+        istop = _index(stop)
         width = istop - istart
-        try:
-            istep = _index(step)
-        except TypeError:
-            istep = int(step)
-            if istep != step:
-                _warn('randrange() will raise TypeError in the future',
-                      DeprecationWarning, 2)
-                raise ValueError("non-integer step for randrange()")
-            _warn('non-integer arguments to randrange() have been deprecated '
-                  'since Python 3.10 and will be removed in a subsequent '
-                  'version',
-                  DeprecationWarning, 2)
+        istep = _index(step)
         # Fast path.
         if istep == 1:
             if width > 0:
                 return istart + self._randbelow(width)
-            raise ValueError("empty range for randrange() (%d, %d, %d)" % (istart, istop, width))
+            raise ValueError(f"empty range in randrange({start}, {stop})")
 
         # Non-unit step argument supplied.
         if istep > 0:
@@ -352,7 +326,7 @@ class Random(_random.Random):
         else:
             raise ValueError("zero step for randrange()")
         if n <= 0:
-            raise ValueError("empty range for randrange()")
+            raise ValueError(f"empty range in randrange({start}, {stop}, {step})")
         return istart + istep * self._randbelow(n)
 
     def randint(self, a, b):
@@ -518,7 +492,14 @@ class Random(_random.Random):
     ## -------------------- real-valued distributions  -------------------
 
     def uniform(self, a, b):
-        "Get a random number in the range [a, b) or [a, b] depending on rounding."
+        """Get a random number in the range [a, b) or [a, b] depending on rounding.
+
+        The mean (expected value) and variance of the random variable are:
+
+            E[X] = (a + b) / 2
+            Var[X] = (b - a) ** 2 / 12
+
+        """
         return a + (b - a) * self.random()
 
     def triangular(self, low=0.0, high=1.0, mode=None):
@@ -529,6 +510,11 @@ class Random(_random.Random):
 
         http://en.wikipedia.org/wiki/Triangular_distribution
 
+        The mean (expected value) and variance of the random variable are:
+
+            E[X] = (low + high + mode) / 3
+            Var[X] = (low**2 + high**2 + mode**2 - low*high - low*mode - high*mode) / 18
+
         """
         u = self.random()
         try:
@@ -610,7 +596,7 @@ class Random(_random.Random):
         """
         return _exp(self.normalvariate(mu, sigma))
 
-    def expovariate(self, lambd):
+    def expovariate(self, lambd=1.0):
         """Exponential distribution.
 
         lambd is 1.0 divided by the desired mean.  It should be
@@ -619,12 +605,15 @@ class Random(_random.Random):
         positive infinity if lambd is positive, and from negative
         infinity to 0 if lambd is negative.
 
-        """
-        # lambd: rate lambd = 1/mean
-        # ('lambda' is a Python reserved word)
+        The mean (expected value) and variance of the random variable are:
 
+            E[X] = 1 / lambd
+            Var[X] = 1 / lambd ** 2
+
+        """
         # we use 1-random() instead of random() to preclude the
         # possibility of taking the log of zero.
+
         return -_log(1.0 - self.random()) / lambd
 
     def vonmisesvariate(self, mu, kappa):
@@ -680,8 +669,12 @@ class Random(_random.Random):
           pdf(x) =  --------------------------------------
                       math.gamma(alpha) * beta ** alpha
 
+        The mean (expected value) and variance of the random variable are:
+
+            E[X] = alpha * beta
+            Var[X] = alpha * beta ** 2
+
         """
-        # alpha > 0, beta > 0, mean is alpha*beta, variance is alpha*beta**2
 
         # Warning: a few older sources define the gamma distribution in terms
         # of alpha > -1.0
@@ -740,6 +733,11 @@ class Random(_random.Random):
         Conditions on the parameters are alpha > 0 and beta > 0.
         Returned values range between 0 and 1.
 
+        The mean (expected value) and variance of the random variable are:
+
+            E[X] = alpha / (alpha + beta)
+            Var[X] = alpha * beta / ((alpha + beta)**2 * (alpha + beta + 1))
+
         """
         ## See
         ## http://mail.python.org/pipermail/python-bugs-list/2001-January/003752.html
@@ -780,6 +778,97 @@ class Random(_random.Random):
         return alpha * (-_log(u)) ** (1.0 / beta)
 
 
+    ## -------------------- discrete  distributions  ---------------------
+
+    def binomialvariate(self, n=1, p=0.5):
+        """Binomial random variable.
+
+        Gives the number of successes for *n* independent trials
+        with the probability of success in each trial being *p*:
+
+            sum(random() < p for i in range(n))
+
+        Returns an integer in the range:   0 <= X <= n
+
+        The mean (expected value) and variance of the random variable are:
+
+            E[X] = n * p
+            Var[x] = n * p * (1 - p)
+
+        """
+        # Error check inputs and handle edge cases
+        if n < 0:
+            raise ValueError("n must be non-negative")
+        if p <= 0.0 or p >= 1.0:
+            if p == 0.0:
+                return 0
+            if p == 1.0:
+                return n
+            raise ValueError("p must be in the range 0.0 <= p <= 1.0")
+
+        random = self.random
+
+        # Fast path for a common case
+        if n == 1:
+            return _index(random() < p)
+
+        # Exploit symmetry to establish:  p <= 0.5
+        if p > 0.5:
+            return n - self.binomialvariate(n, 1.0 - p)
+
+        if n * p < 10.0:
+            # BG: Geometric method by Devroye with running time of O(np).
+            # https://dl.acm.org/doi/pdf/10.1145/42372.42381
+            x = y = 0
+            c = _log2(1.0 - p)
+            if not c:
+                return x
+            while True:
+                y += _floor(_log2(random()) / c) + 1
+                if y > n:
+                    return x
+                x += 1
+
+        # BTRS: Transformed rejection with squeeze method by Wolfgang Hörmann
+        # https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.47.8407&rep=rep1&type=pdf
+        assert n*p >= 10.0 and p <= 0.5
+        setup_complete = False
+
+        spq = _sqrt(n * p * (1.0 - p))  # Standard deviation of the distribution
+        b = 1.15 + 2.53 * spq
+        a = -0.0873 + 0.0248 * b + 0.01 * p
+        c = n * p + 0.5
+        vr = 0.92 - 4.2 / b
+
+        while True:
+
+            u = random()
+            u -= 0.5
+            us = 0.5 - _fabs(u)
+            k = _floor((2.0 * a / us + b) * u + c)
+            if k < 0 or k > n:
+                continue
+
+            # The early-out "squeeze" test substantially reduces
+            # the number of acceptance condition evaluations.
+            v = random()
+            if us >= 0.07 and v <= vr:
+                return k
+
+            # Acceptance-rejection test.
+            # Note, the original paper erroneously omits the call to log(v)
+            # when comparing to the log of the rescaled binomial distribution.
+            if not setup_complete:
+                alpha = (2.83 + 5.1 / b) * spq
+                lpq = _log(p / (1.0 - p))
+                m = _floor((n + 1) * p)         # Mode of the distribution
+                h = _lgamma(m + 1) + _lgamma(n - m + 1)
+                setup_complete = True           # Only needs to be done once
+            v *= alpha / (a / (us * us) + b)
+            if _log(v) <= h - _lgamma(k + 1) - _lgamma(n - k + 1) + (k - m) * lpq:
+                return k
+
+
 ## ------------------------------------------------------------------
 ## --------------- Operating System Random Source  ------------------
 
@@ -846,6 +935,7 @@ vonmisesvariate = _inst.vonmisesvariate
 gammavariate = _inst.gammavariate
 gauss = _inst.gauss
 betavariate = _inst.betavariate
+binomialvariate = _inst.binomialvariate
 paretovariate = _inst.paretovariate
 weibullvariate = _inst.weibullvariate
 getstate = _inst.getstate
@@ -870,15 +960,17 @@ def _test_generator(n, func, args):
     low = min(data)
     high = max(data)
 
-    print(f'{t1 - t0:.3f} sec, {n} times {func.__name__}')
+    print(f'{t1 - t0:.3f} sec, {n} times {func.__name__}{args!r}')
     print('avg %g, stddev %g, min %g, max %g\n' % (xbar, sigma, low, high))
 
 
-def _test(N=2000):
+def _test(N=10_000):
     _test_generator(N, random, ())
     _test_generator(N, normalvariate, (0.0, 1.0))
     _test_generator(N, lognormvariate, (0.0, 1.0))
     _test_generator(N, vonmisesvariate, (0.0, 1.0))
+    _test_generator(N, binomialvariate, (15, 0.60))
+    _test_generator(N, binomialvariate, (100, 0.75))
     _test_generator(N, gammavariate, (0.01, 1.0))
     _test_generator(N, gammavariate, (0.1, 1.0))
     _test_generator(N, gammavariate, (0.1, 2.0))
diff --git a/contrib/tools/python3/src/Lib/re/__init__.py b/contrib/tools/python3/src/Lib/re/__init__.py
index d58c2117ef..4515650a72 100644
--- a/contrib/tools/python3/src/Lib/re/__init__.py
+++ b/contrib/tools/python3/src/Lib/re/__init__.py
@@ -124,6 +124,7 @@ This module also defines an exception 'error'.
 import enum
 from . import _compiler, _parser
 import functools
+import _sre
 
 
 # public symbols
@@ -229,7 +230,8 @@ def compile(pattern, flags=0):
 def purge():
     "Clear the regular expression caches"
     _cache.clear()
-    _compile_repl.cache_clear()
+    _cache2.clear()
+    _compile_template.cache_clear()
 
 def template(pattern, flags=0):
     "Compile a template pattern, returning a Pattern object, deprecated"
@@ -266,61 +268,70 @@ Match = type(_compiler.compile('', 0).match(''))
 # --------------------------------------------------------------------
 # internals
 
-_cache = {}  # ordered!
-
+# Use the fact that dict keeps the insertion order.
+# _cache2 uses the simple FIFO policy which has better latency.
+# _cache uses the LRU policy which has better hit rate.
+_cache = {}  # LRU
+_cache2 = {}  # FIFO
 _MAXCACHE = 512
+_MAXCACHE2 = 256
+assert _MAXCACHE2 < _MAXCACHE
+
 def _compile(pattern, flags):
     # internal: compile pattern
     if isinstance(flags, RegexFlag):
         flags = flags.value
     try:
-        return _cache[type(pattern), pattern, flags]
+        return _cache2[type(pattern), pattern, flags]
     except KeyError:
         pass
-    if isinstance(pattern, Pattern):
-        if flags:
-            raise ValueError(
-                "cannot process flags argument with a compiled pattern")
-        return pattern
-    if not _compiler.isstring(pattern):
-        raise TypeError("first argument must be string or compiled pattern")
-    if flags & T:
-        import warnings
-        warnings.warn("The re.TEMPLATE/re.T flag is deprecated "
-                  "as it is an undocumented flag "
-                  "without an obvious purpose. "
-                  "Don't use it.",
-                  DeprecationWarning)
-    p = _compiler.compile(pattern, flags)
-    if not (flags & DEBUG):
+
+    key = (type(pattern), pattern, flags)
+    # Item in _cache should be moved to the end if found.
+    p = _cache.pop(key, None)
+    if p is None:
+        if isinstance(pattern, Pattern):
+            if flags:
+                raise ValueError(
+                    "cannot process flags argument with a compiled pattern")
+            return pattern
+        if not _compiler.isstring(pattern):
+            raise TypeError("first argument must be string or compiled pattern")
+        if flags & T:
+            import warnings
+            warnings.warn("The re.TEMPLATE/re.T flag is deprecated "
+                    "as it is an undocumented flag "
+                    "without an obvious purpose. "
+                    "Don't use it.",
+                    DeprecationWarning)
+        p = _compiler.compile(pattern, flags)
+        if flags & DEBUG:
+            return p
         if len(_cache) >= _MAXCACHE:
-            # Drop the oldest item
+            # Drop the least recently used item.
+            # next(iter(_cache)) is known to have linear amortized time,
+            # but it is used here to avoid a dependency from using OrderedDict.
+            # For the small _MAXCACHE value it doesn't make much of a difference.
             try:
                 del _cache[next(iter(_cache))]
             except (StopIteration, RuntimeError, KeyError):
                 pass
-        _cache[type(pattern), pattern, flags] = p
+    # Append to the end.
+    _cache[key] = p
+
+    if len(_cache2) >= _MAXCACHE2:
+        # Drop the oldest item.
+        try:
+            del _cache2[next(iter(_cache2))]
+        except (StopIteration, RuntimeError, KeyError):
+            pass
+    _cache2[key] = p
     return p
 
 @functools.lru_cache(_MAXCACHE)
-def _compile_repl(repl, pattern):
+def _compile_template(pattern, repl):
     # internal: compile replacement pattern
-    return _parser.parse_template(repl, pattern)
-
-def _expand(pattern, match, template):
-    # internal: Match.expand implementation hook
-    template = _parser.parse_template(template, pattern)
-    return _parser.expand_template(template, match)
-
-def _subx(pattern, template):
-    # internal: Pattern.sub/subn implementation helper
-    template = _compile_repl(template, pattern)
-    if not template[0] and len(template[1]) == 1:
-        # literal replacement
-        return template[1][0]
-    def filter(match, template=template):
-        return _parser.expand_template(template, match)
-    return filter
+    return _sre.template(pattern, _parser.parse_template(repl, pattern))
 
 # register myself for pickling
 
diff --git a/contrib/tools/python3/src/Lib/re/_constants.py b/contrib/tools/python3/src/Lib/re/_constants.py
index 10ee14bfab..d8718d3607 100644
--- a/contrib/tools/python3/src/Lib/re/_constants.py
+++ b/contrib/tools/python3/src/Lib/re/_constants.py
@@ -13,7 +13,7 @@
 
 # update when constants are added or removed
 
-MAGIC = 20220615
+MAGIC = 20221023
 
 from _sre import MAXREPEAT, MAXGROUPS
 
diff --git a/contrib/tools/python3/src/Lib/re/_parser.py b/contrib/tools/python3/src/Lib/re/_parser.py
index c795a7fb00..4a492b79e8 100644
--- a/contrib/tools/python3/src/Lib/re/_parser.py
+++ b/contrib/tools/python3/src/Lib/re/_parser.py
@@ -301,17 +301,13 @@ class Tokenizer:
             msg = msg.encode('ascii', 'backslashreplace').decode('ascii')
         return error(msg, self.string, self.tell() - offset)
 
-    def checkgroupname(self, name, offset, nested):
+    def checkgroupname(self, name, offset):
+        if not (self.istext or name.isascii()):
+            msg = "bad character in group name %a" % name
+            raise self.error(msg, len(name) + offset)
         if not name.isidentifier():
             msg = "bad character in group name %r" % name
             raise self.error(msg, len(name) + offset)
-        if not (self.istext or name.isascii()):
-            import warnings
-            warnings.warn(
-                "bad character in group name %a at position %d" %
-                (name, self.tell() - len(name) - offset),
-                DeprecationWarning, stacklevel=nested + 7
-            )
 
 def _class_escape(source, escape):
     # handle escape code inside character class
@@ -727,11 +723,11 @@ def _parse(source, state, verbose, nested, first=False):
                     if sourcematch("<"):
                         # named group: skip forward to end of name
                         name = source.getuntil(">", "group name")
-                        source.checkgroupname(name, 1, nested)
+                        source.checkgroupname(name, 1)
                     elif sourcematch("="):
                         # named backreference
                         name = source.getuntil(")", "group name")
-                        source.checkgroupname(name, 1, nested)
+                        source.checkgroupname(name, 1)
                         gid = state.groupdict.get(name)
                         if gid is None:
                             msg = "unknown group name %r" % name
@@ -792,20 +788,14 @@ def _parse(source, state, verbose, nested, first=False):
                 elif char == "(":
                     # conditional backreference group
                     condname = source.getuntil(")", "group name")
-                    if condname.isidentifier():
-                        source.checkgroupname(condname, 1, nested)
+                    if not (condname.isdecimal() and condname.isascii()):
+                        source.checkgroupname(condname, 1)
                         condgroup = state.groupdict.get(condname)
                         if condgroup is None:
                             msg = "unknown group name %r" % condname
                             raise source.error(msg, len(condname) + 1)
                     else:
-                        try:
-                            condgroup = int(condname)
-                            if condgroup < 0:
-                                raise ValueError
-                        except ValueError:
-                            msg = "bad character in group name %r" % condname
-                            raise source.error(msg, len(condname) + 1) from None
+                        condgroup = int(condname)
                         if not condgroup:
                             raise source.error("bad group number",
                                                len(condname) + 1)
@@ -1003,24 +993,28 @@ def parse(str, flags=0, state=None):
 
     return p
 
-def parse_template(source, state):
+def parse_template(source, pattern):
     # parse 're' replacement string into list of literals and
     # group references
     s = Tokenizer(source)
     sget = s.get
-    groups = []
-    literals = []
+    result = []
     literal = []
     lappend = literal.append
+    def addliteral():
+        if s.istext:
+            result.append(''.join(literal))
+        else:
+            # The tokenizer implicitly decodes bytes objects as latin-1, we must
+            # therefore re-encode the final representation.
+            result.append(''.join(literal).encode('latin-1'))
+        del literal[:]
     def addgroup(index, pos):
-        if index > state.groups:
+        if index > pattern.groups:
             raise s.error("invalid group reference %d" % index, pos)
-        if literal:
-            literals.append(''.join(literal))
-            del literal[:]
-        groups.append((len(literals), index))
-        literals.append(None)
-    groupindex = state.groupindex
+        addliteral()
+        result.append(index)
+    groupindex = pattern.groupindex
     while True:
         this = sget()
         if this is None:
@@ -1032,20 +1026,14 @@ def parse_template(source, state):
                 if not s.match("<"):
                     raise s.error("missing <")
                 name = s.getuntil(">", "group name")
-                if name.isidentifier():
-                    s.checkgroupname(name, 1, -1)
+                if not (name.isdecimal() and name.isascii()):
+                    s.checkgroupname(name, 1)
                     try:
                         index = groupindex[name]
                     except KeyError:
                         raise IndexError("unknown group name %r" % name) from None
                 else:
-                    try:
-                        index = int(name)
-                        if index < 0:
-                            raise ValueError
-                    except ValueError:
-                        raise s.error("bad character in group name %r" % name,
-                                      len(name) + 1) from None
+                    index = int(name)
                     if index >= MAXGROUPS:
                         raise s.error("invalid group reference %d" % index,
                                       len(name) + 1)
@@ -1088,22 +1076,5 @@ def parse_template(source, state):
                 lappend(this)
         else:
             lappend(this)
-    if literal:
-        literals.append(''.join(literal))
-    if not isinstance(source, str):
-        # The tokenizer implicitly decodes bytes objects as latin-1, we must
-        # therefore re-encode the final representation.
-        literals = [None if s is None else s.encode('latin-1') for s in literals]
-    return groups, literals
-
-def expand_template(template, match):
-    g = match.group
-    empty = match.string[:0]
-    groups, literals = template
-    literals = literals[:]
-    try:
-        for index, group in groups:
-            literals[index] = g(group) or empty
-    except IndexError:
-        raise error("invalid group reference %d" % index) from None
-    return empty.join(literals)
+    addliteral()
+    return result
diff --git a/contrib/tools/python3/src/Lib/reprlib.py b/contrib/tools/python3/src/Lib/reprlib.py
index f3518df105..a7b37630a4 100644
--- a/contrib/tools/python3/src/Lib/reprlib.py
+++ b/contrib/tools/python3/src/Lib/reprlib.py
@@ -29,25 +29,31 @@ def recursive_repr(fillvalue='...'):
         wrapper.__name__ = getattr(user_function, '__name__')
         wrapper.__qualname__ = getattr(user_function, '__qualname__')
         wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
+        wrapper.__type_params__ = getattr(user_function, '__type_params__', ())
         return wrapper
 
     return decorating_function
 
 class Repr:
 
-    def __init__(self):
-        self.fillvalue = '...'
-        self.maxlevel = 6
-        self.maxtuple = 6
-        self.maxlist = 6
-        self.maxarray = 5
-        self.maxdict = 4
-        self.maxset = 6
-        self.maxfrozenset = 6
-        self.maxdeque = 6
-        self.maxstring = 30
-        self.maxlong = 40
-        self.maxother = 30
+    def __init__(
+        self, *, maxlevel=6, maxtuple=6, maxlist=6, maxarray=5, maxdict=4,
+        maxset=6, maxfrozenset=6, maxdeque=6, maxstring=30, maxlong=40,
+        maxother=30, fillvalue='...', indent=None,
+    ):
+        self.maxlevel = maxlevel
+        self.maxtuple = maxtuple
+        self.maxlist = maxlist
+        self.maxarray = maxarray
+        self.maxdict = maxdict
+        self.maxset = maxset
+        self.maxfrozenset = maxfrozenset
+        self.maxdeque = maxdeque
+        self.maxstring = maxstring
+        self.maxlong = maxlong
+        self.maxother = maxother
+        self.fillvalue = fillvalue
+        self.indent = indent
 
     def repr(self, x):
         return self.repr1(x, self.maxlevel)
@@ -62,6 +68,26 @@ class Repr:
         else:
             return self.repr_instance(x, level)
 
+    def _join(self, pieces, level):
+        if self.indent is None:
+            return ', '.join(pieces)
+        if not pieces:
+            return ''
+        indent = self.indent
+        if isinstance(indent, int):
+            if indent < 0:
+                raise ValueError(
+                    f'Repr.indent cannot be negative int (was {indent!r})'
+                )
+            indent *= ' '
+        try:
+            sep = ',\n' + (self.maxlevel - level + 1) * indent
+        except TypeError as error:
+            raise TypeError(
+                f'Repr.indent must be a str, int or None, not {type(indent)}'
+            ) from error
+        return sep.join(('', *pieces, ''))[1:-len(indent) or None]
+
     def _repr_iterable(self, x, level, left, right, maxiter, trail=''):
         n = len(x)
         if level <= 0 and n:
@@ -72,8 +98,8 @@ class Repr:
             pieces = [repr1(elem, newlevel) for elem in islice(x, maxiter)]
             if n > maxiter:
                 pieces.append(self.fillvalue)
-            s = ', '.join(pieces)
-            if n == 1 and trail:
+            s = self._join(pieces, level)
+            if n == 1 and trail and self.indent is None:
                 right = trail + right
         return '%s%s%s' % (left, s, right)
 
@@ -120,7 +146,7 @@ class Repr:
             pieces.append('%s: %s' % (keyrepr, valrepr))
         if n > self.maxdict:
             pieces.append(self.fillvalue)
-        s = ', '.join(pieces)
+        s = self._join(pieces, level)
         return '{%s}' % (s,)
 
     def repr_str(self, x, level):
diff --git a/contrib/tools/python3/src/Lib/runpy.py b/contrib/tools/python3/src/Lib/runpy.py
index 54fc136d40..42f896c9cd 100644
--- a/contrib/tools/python3/src/Lib/runpy.py
+++ b/contrib/tools/python3/src/Lib/runpy.py
@@ -279,12 +279,7 @@ def run_path(path_name, init_globals=None, run_name=None):
     pkg_name = run_name.rpartition(".")[0]
     from pkgutil import get_importer
     importer = get_importer(path_name)
-    # Trying to avoid importing imp so as to not consume the deprecation warning.
-    is_NullImporter = False
-    if type(importer).__module__ == 'imp':
-        if type(importer).__name__ == 'NullImporter':
-            is_NullImporter = True
-    if isinstance(importer, type(None)) or is_NullImporter:
+    if isinstance(importer, type(None)):
         # Not a valid sys.path entry, so run the code directly
         # execfile() doesn't help as we want to allow compiled files
         code, fname = _get_code_from_file(run_name, path_name)
diff --git a/contrib/tools/python3/src/Lib/secrets.py b/contrib/tools/python3/src/Lib/secrets.py
index 900381a89f..566a09b731 100644
--- a/contrib/tools/python3/src/Lib/secrets.py
+++ b/contrib/tools/python3/src/Lib/secrets.py
@@ -13,7 +13,6 @@ __all__ = ['choice', 'randbelow', 'randbits', 'SystemRandom',
 
 
 import base64
-import binascii
 
 from hmac import compare_digest
 from random import SystemRandom
@@ -56,7 +55,7 @@ def token_hex(nbytes=None):
     'f9bf78b9a18ce6d46a0cd2b0b86df9da'
 
     """
-    return binascii.hexlify(token_bytes(nbytes)).decode('ascii')
+    return token_bytes(nbytes).hex()
 
 def token_urlsafe(nbytes=None):
     """Return a random URL-safe text string, in Base64 encoding.
diff --git a/contrib/tools/python3/src/Lib/shlex.py b/contrib/tools/python3/src/Lib/shlex.py
index 4801a6c1d4..f4821616b6 100644
--- a/contrib/tools/python3/src/Lib/shlex.py
+++ b/contrib/tools/python3/src/Lib/shlex.py
@@ -305,9 +305,7 @@ class shlex:
 def split(s, comments=False, posix=True):
     """Split the string *s* using shell-like syntax."""
     if s is None:
-        import warnings
-        warnings.warn("Passing None for 's' to shlex.split() is deprecated.",
-                      DeprecationWarning, stacklevel=2)
+        raise ValueError("s argument must not be None")
     lex = shlex(s, posix=posix)
     lex.whitespace_split = True
     if not comments:
@@ -335,10 +333,7 @@ def quote(s):
 
 
 def _print_tokens(lexer):
-    while 1:
-        tt = lexer.get_token()
-        if not tt:
-            break
+    while tt := lexer.get_token():
         print("Token: " + repr(tt))
 
 if __name__ == '__main__':
diff --git a/contrib/tools/python3/src/Lib/shutil.py b/contrib/tools/python3/src/Lib/shutil.py
index 79b38cf456..96463007d1 100644
--- a/contrib/tools/python3/src/Lib/shutil.py
+++ b/contrib/tools/python3/src/Lib/shutil.py
@@ -10,6 +10,7 @@ import stat
 import fnmatch
 import collections
 import errno
+import warnings
 
 try:
     import zlib
@@ -39,6 +40,11 @@ if os.name == 'posix':
 elif _WINDOWS:
     import nt
 
+if sys.platform == 'win32':
+    import _winapi
+else:
+    _winapi = None
+
 COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 64 * 1024
 # This should never be removed, see rationale in:
 # https://bugs.python.org/issue43743#msg393429
@@ -182,7 +188,8 @@ def _copyfileobj_readinto(fsrc, fdst, length=COPY_BUFSIZE):
                 break
             elif n < length:
                 with mv[:n] as smv:
-                    fdst.write(smv)
+                    fdst_write(smv)
+                break
             else:
                 fdst_write(mv)
 
@@ -193,10 +200,7 @@ def copyfileobj(fsrc, fdst, length=0):
     # Localize variable access to minimize overhead.
     fsrc_read = fsrc.read
     fdst_write = fdst.write
-    while True:
-        buf = fsrc_read(length)
-        if not buf:
-            break
+    while buf := fsrc_read(length):
         fdst_write(buf)
 
 def _samefile(src, dst):
@@ -334,7 +338,7 @@ if hasattr(os, 'listxattr'):
                 os.setxattr(dst, name, value, follow_symlinks=follow_symlinks)
             except OSError as e:
                 if e.errno not in (errno.EPERM, errno.ENOTSUP, errno.ENODATA,
-                                   errno.EINVAL):
+                                   errno.EINVAL, errno.EACCES):
                     raise
 else:
     def _copyxattr(*args, **kwargs):
@@ -445,6 +449,29 @@ def copy2(src, dst, *, follow_symlinks=True):
     """
     if os.path.isdir(dst):
         dst = os.path.join(dst, os.path.basename(src))
+
+    if hasattr(_winapi, "CopyFile2"):
+        src_ = os.fsdecode(src)
+        dst_ = os.fsdecode(dst)
+        flags = _winapi.COPY_FILE_ALLOW_DECRYPTED_DESTINATION # for compat
+        if not follow_symlinks:
+            flags |= _winapi.COPY_FILE_COPY_SYMLINK
+        try:
+            _winapi.CopyFile2(src_, dst_, flags)
+            return dst
+        except OSError as exc:
+            if (exc.winerror == _winapi.ERROR_PRIVILEGE_NOT_HELD
+                and not follow_symlinks):
+                # Likely encountered a symlink we aren't allowed to create.
+                # Fall back on the old code
+                pass
+            elif exc.winerror == _winapi.ERROR_ACCESS_DENIED:
+                # Possibly encountered a hidden or readonly file we can't
+                # overwrite. Fall back on old code
+                pass
+            else:
+                raise
+
     copyfile(src, dst, follow_symlinks=follow_symlinks)
     copystat(src, dst, follow_symlinks=follow_symlinks)
     return dst
@@ -576,18 +603,6 @@ def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
                      dirs_exist_ok=dirs_exist_ok)
 
 if hasattr(os.stat_result, 'st_file_attributes'):
-    # Special handling for directory junctions to make them behave like
-    # symlinks for shutil.rmtree, since in general they do not appear as
-    # regular links.
-    def _rmtree_isdir(entry):
-        try:
-            st = entry.stat(follow_symlinks=False)
-            return (stat.S_ISDIR(st.st_mode) and not
-                (st.st_file_attributes & stat.FILE_ATTRIBUTE_REPARSE_POINT
-                 and st.st_reparse_tag == stat.IO_REPARSE_TAG_MOUNT_POINT))
-        except OSError:
-            return False
-
     def _rmtree_islink(path):
         try:
             st = os.lstat(path)
@@ -597,54 +612,53 @@ if hasattr(os.stat_result, 'st_file_attributes'):
         except OSError:
             return False
 else:
-    def _rmtree_isdir(entry):
-        try:
-            return entry.is_dir(follow_symlinks=False)
-        except OSError:
-            return False
-
     def _rmtree_islink(path):
         return os.path.islink(path)
 
 # version vulnerable to race conditions
-def _rmtree_unsafe(path, onerror):
+def _rmtree_unsafe(path, onexc):
     try:
         with os.scandir(path) as scandir_it:
             entries = list(scandir_it)
-    except OSError:
-        onerror(os.scandir, path, sys.exc_info())
+    except OSError as err:
+        onexc(os.scandir, path, err)
         entries = []
     for entry in entries:
         fullname = entry.path
-        if _rmtree_isdir(entry):
+        try:
+            is_dir = entry.is_dir(follow_symlinks=False)
+        except OSError:
+            is_dir = False
+
+        if is_dir and not entry.is_junction():
             try:
                 if entry.is_symlink():
                     # This can only happen if someone replaces
                     # a directory with a symlink after the call to
                     # os.scandir or entry.is_dir above.
                     raise OSError("Cannot call rmtree on a symbolic link")
-            except OSError:
-                onerror(os.path.islink, fullname, sys.exc_info())
+            except OSError as err:
+                onexc(os.path.islink, fullname, err)
                 continue
-            _rmtree_unsafe(fullname, onerror)
+            _rmtree_unsafe(fullname, onexc)
         else:
             try:
                 os.unlink(fullname)
-            except OSError:
-                onerror(os.unlink, fullname, sys.exc_info())
+            except OSError as err:
+                onexc(os.unlink, fullname, err)
     try:
         os.rmdir(path)
-    except OSError:
-        onerror(os.rmdir, path, sys.exc_info())
+    except OSError as err:
+        onexc(os.rmdir, path, err)
 
 # Version using fd-based APIs to protect against races
-def _rmtree_safe_fd(topfd, path, onerror):
+def _rmtree_safe_fd(topfd, path, onexc):
     try:
         with os.scandir(topfd) as scandir_it:
             entries = list(scandir_it)
     except OSError as err:
         err.filename = path
-        onerror(os.scandir, path, sys.exc_info())
+        onexc(os.scandir, path, err)
         return
     for entry in entries:
         fullname = os.path.join(path, entry.name)
@@ -657,30 +671,30 @@ def _rmtree_safe_fd(topfd, path, onerror):
                 try:
                     orig_st = entry.stat(follow_symlinks=False)
                     is_dir = stat.S_ISDIR(orig_st.st_mode)
-                except OSError:
-                    onerror(os.lstat, fullname, sys.exc_info())
+                except OSError as err:
+                    onexc(os.lstat, fullname, err)
                     continue
         if is_dir:
             try:
                 dirfd = os.open(entry.name, os.O_RDONLY, dir_fd=topfd)
                 dirfd_closed = False
-            except OSError:
-                onerror(os.open, fullname, sys.exc_info())
+            except OSError as err:
+                onexc(os.open, fullname, err)
             else:
                 try:
                     if os.path.samestat(orig_st, os.fstat(dirfd)):
-                        _rmtree_safe_fd(dirfd, fullname, onerror)
+                        _rmtree_safe_fd(dirfd, fullname, onexc)
                         try:
                             os.close(dirfd)
-                        except OSError:
+                        except OSError as err:
                             # close() should not be retried after an error.
                             dirfd_closed = True
-                            onerror(os.close, fullname, sys.exc_info())
+                            onexc(os.close, fullname, err)
                         dirfd_closed = True
                         try:
                             os.rmdir(entry.name, dir_fd=topfd)
-                        except OSError:
-                            onerror(os.rmdir, fullname, sys.exc_info())
+                        except OSError as err:
+                            onexc(os.rmdir, fullname, err)
                     else:
                         try:
                             # This can only happen if someone replaces
@@ -688,26 +702,26 @@ def _rmtree_safe_fd(topfd, path, onerror):
                             # os.scandir or stat.S_ISDIR above.
                             raise OSError("Cannot call rmtree on a symbolic "
                                           "link")
-                        except OSError:
-                            onerror(os.path.islink, fullname, sys.exc_info())
+                        except OSError as err:
+                            onexc(os.path.islink, fullname, err)
                 finally:
                     if not dirfd_closed:
                         try:
                             os.close(dirfd)
-                        except OSError:
-                            onerror(os.close, fullname, sys.exc_info())
+                        except OSError as err:
+                            onexc(os.close, fullname, err)
         else:
             try:
                 os.unlink(entry.name, dir_fd=topfd)
-            except OSError:
-                onerror(os.unlink, fullname, sys.exc_info())
+            except OSError as err:
+                onexc(os.unlink, fullname, err)
 
 _use_fd_functions = ({os.open, os.stat, os.unlink, os.rmdir} <=
                      os.supports_dir_fd and
                      os.scandir in os.supports_fd and
                      os.stat in os.supports_follow_symlinks)
 
-def rmtree(path, ignore_errors=False, onerror=None, *, dir_fd=None):
+def rmtree(path, ignore_errors=False, onerror=None, *, onexc=None, dir_fd=None):
     """Recursively delete a directory tree.
 
     If dir_fd is not None, it should be a file descriptor open to a directory;
@@ -715,21 +729,40 @@ def rmtree(path, ignore_errors=False, onerror=None, *, dir_fd=None):
     dir_fd may not be implemented on your platform.
     If it is unavailable, using it will raise a NotImplementedError.
 
-    If ignore_errors is set, errors are ignored; otherwise, if onerror
-    is set, it is called to handle the error with arguments (func,
+    If ignore_errors is set, errors are ignored; otherwise, if onexc or
+    onerror is set, it is called to handle the error with arguments (func,
     path, exc_info) where func is platform and implementation dependent;
     path is the argument to that function that caused it to fail; and
-    exc_info is a tuple returned by sys.exc_info().  If ignore_errors
-    is false and onerror is None, an exception is raised.
+    the value of exc_info describes the exception. For onexc it is the
+    exception instance, and for onerror it is a tuple as returned by
+    sys.exc_info().  If ignore_errors is false and both onexc and
+    onerror are None, the exception is reraised.
 
+    onerror is deprecated and only remains for backwards compatibility.
+    If both onerror and onexc are set, onerror is ignored and onexc is used.
     """
+
     sys.audit("shutil.rmtree", path, dir_fd)
     if ignore_errors:
-        def onerror(*args):
+        def onexc(*args):
             pass
-    elif onerror is None:
-        def onerror(*args):
+    elif onerror is None and onexc is None:
+        def onexc(*args):
             raise
+    elif onexc is None:
+        if onerror is None:
+            def onexc(*args):
+                raise
+        else:
+            # delegate to onerror
+            def onexc(*args):
+                func, path, exc = args
+                if exc is None:
+                    exc_info = None, None, None
+                else:
+                    exc_info = type(exc), exc, exc.__traceback__
+                return onerror(func, path, exc_info)
+
     if _use_fd_functions:
         # While the unsafe rmtree works fine on bytes, the fd based does not.
         if isinstance(path, bytes):
@@ -738,41 +771,41 @@ def rmtree(path, ignore_errors=False, onerror=None, *, dir_fd=None):
         # lstat()/open()/fstat() trick.
         try:
             orig_st = os.lstat(path, dir_fd=dir_fd)
-        except Exception:
-            onerror(os.lstat, path, sys.exc_info())
+        except Exception as err:
+            onexc(os.lstat, path, err)
             return
         try:
             fd = os.open(path, os.O_RDONLY, dir_fd=dir_fd)
             fd_closed = False
-        except Exception:
-            onerror(os.open, path, sys.exc_info())
+        except Exception as err:
+            onexc(os.open, path, err)
             return
         try:
             if os.path.samestat(orig_st, os.fstat(fd)):
-                _rmtree_safe_fd(fd, path, onerror)
+                _rmtree_safe_fd(fd, path, onexc)
                 try:
                     os.close(fd)
-                except OSError:
+                except OSError as err:
                     # close() should not be retried after an error.
                     fd_closed = True
-                    onerror(os.close, path, sys.exc_info())
+                    onexc(os.close, path, err)
                 fd_closed = True
                 try:
                     os.rmdir(path, dir_fd=dir_fd)
-                except OSError:
-                    onerror(os.rmdir, path, sys.exc_info())
+                except OSError as err:
+                    onexc(os.rmdir, path, err)
             else:
                 try:
                     # symlinks to directories are forbidden, see bug #1669
                     raise OSError("Cannot call rmtree on a symbolic link")
-                except OSError:
-                    onerror(os.path.islink, path, sys.exc_info())
+                except OSError as err:
+                    onexc(os.path.islink, path, err)
         finally:
             if not fd_closed:
                 try:
                     os.close(fd)
-                except OSError:
-                    onerror(os.close, path, sys.exc_info())
+                except OSError as err:
+                    onexc(os.close, path, err)
     else:
         if dir_fd is not None:
             raise NotImplementedError("dir_fd unavailable on this platform")
@@ -780,11 +813,11 @@ def rmtree(path, ignore_errors=False, onerror=None, *, dir_fd=None):
             if _rmtree_islink(path):
                 # symlinks to directories are forbidden, see bug #1669
                 raise OSError("Cannot call rmtree on a symbolic link")
-        except OSError:
-            onerror(os.path.islink, path, sys.exc_info())
-            # can't continue even if onerror hook returns
+        except OSError as err:
+            onexc(os.path.islink, path, err)
+            # can't continue even if onexc hook returns
             return
-        return _rmtree_unsafe(path, onerror)
+        return _rmtree_unsafe(path, onexc)
 
 # Allow introspection of whether or not the hardening against symlink
 # attacks is supported on the current platform
@@ -1051,28 +1084,30 @@ def _make_zipfile(base_name, base_dir, verbose=0, dry_run=0,
         zip_filename = os.path.abspath(zip_filename)
     return zip_filename
 
+_make_tarball.supports_root_dir = True
+_make_zipfile.supports_root_dir = True
+
 # Maps the name of the archive format to a tuple containing:
 # * the archiving function
 # * extra keyword arguments
 # * description
-# * does it support the root_dir argument?
 _ARCHIVE_FORMATS = {
     'tar':   (_make_tarball, [('compress', None)],
-              "uncompressed tar file", True),
+              "uncompressed tar file"),
 }
 
 if _ZLIB_SUPPORTED:
     _ARCHIVE_FORMATS['gztar'] = (_make_tarball, [('compress', 'gzip')],
-                                "gzip'ed tar-file", True)
-    _ARCHIVE_FORMATS['zip'] = (_make_zipfile, [], "ZIP file", True)
+                                "gzip'ed tar-file")
+    _ARCHIVE_FORMATS['zip'] = (_make_zipfile, [], "ZIP file")
 
 if _BZ2_SUPPORTED:
     _ARCHIVE_FORMATS['bztar'] = (_make_tarball, [('compress', 'bzip2')],
-                                "bzip2'ed tar-file", True)
+                                "bzip2'ed tar-file")
 
 if _LZMA_SUPPORTED:
     _ARCHIVE_FORMATS['xztar'] = (_make_tarball, [('compress', 'xz')],
-                                "xz'ed tar-file", True)
+                                "xz'ed tar-file")
 
 def get_archive_formats():
     """Returns a list of supported formats for archiving and unarchiving.
@@ -1103,7 +1138,7 @@ def register_archive_format(name, function, extra_args=None, description=''):
         if not isinstance(element, (tuple, list)) or len(element) !=2:
             raise TypeError('extra_args elements are : (arg_name, value)')
 
-    _ARCHIVE_FORMATS[name] = (function, extra_args, description, False)
+    _ARCHIVE_FORMATS[name] = (function, extra_args, description)
 
 def unregister_archive_format(name):
     del _ARCHIVE_FORMATS[name]
@@ -1142,7 +1177,7 @@ def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0,
     if base_dir is None:
         base_dir = os.curdir
 
-    supports_root_dir = format_info[3]
+    supports_root_dir = getattr(func, 'supports_root_dir', False)
     save_cwd = None
     if root_dir is not None:
         stmd = os.stat(root_dir).st_mode
@@ -1477,6 +1512,16 @@ def _access_check(fn, mode):
             and not os.path.isdir(fn))
 
 
+def _win_path_needs_curdir(cmd, mode):
+    """
+    On Windows, we can use NeedCurrentDirectoryForExePath to figure out
+    if we should add the cwd to PATH when searching for executables if
+    the mode is executable.
+    """
+    return (not (mode & os.X_OK)) or _winapi.NeedCurrentDirectoryForExePath(
+                os.fsdecode(cmd))
+
+
 def which(cmd, mode=os.F_OK | os.X_OK, path=None):
     """Given a command, mode, and a PATH string, return the path which
     conforms to the given mode on the PATH, or None if there is no such
@@ -1487,60 +1532,62 @@ def which(cmd, mode=os.F_OK | os.X_OK, path=None):
     path.
 
     """
-    # If we're given a path with a directory part, look it up directly rather
-    # than referring to PATH directories. This includes checking relative to the
-    # current directory, e.g. ./script
-    if os.path.dirname(cmd):
-        if _access_check(cmd, mode):
-            return cmd
-        return None
-
     use_bytes = isinstance(cmd, bytes)
 
-    if path is None:
-        path = os.environ.get("PATH", None)
-        if path is None:
-            try:
-                path = os.confstr("CS_PATH")
-            except (AttributeError, ValueError):
-                # os.confstr() or CS_PATH is not available
-                path = os.defpath
-        # bpo-35755: Don't use os.defpath if the PATH environment variable is
-        # set to an empty string
-
-    # PATH='' doesn't match, whereas PATH=':' looks in the current directory
-    if not path:
-        return None
-
-    if use_bytes:
-        path = os.fsencode(path)
-        path = path.split(os.fsencode(os.pathsep))
+    # If we're given a path with a directory part, look it up directly rather
+    # than referring to PATH directories. This includes checking relative to
+    # the current directory, e.g. ./script
+    dirname, cmd = os.path.split(cmd)
+    if dirname:
+        path = [dirname]
     else:
-        path = os.fsdecode(path)
-        path = path.split(os.pathsep)
+        if path is None:
+            path = os.environ.get("PATH", None)
+            if path is None:
+                try:
+                    path = os.confstr("CS_PATH")
+                except (AttributeError, ValueError):
+                    # os.confstr() or CS_PATH is not available
+                    path = os.defpath
+            # bpo-35755: Don't use os.defpath if the PATH environment variable
+            # is set to an empty string
+
+        # PATH='' doesn't match, whereas PATH=':' looks in the current
+        # directory
+        if not path:
+            return None
 
-    if sys.platform == "win32":
-        # The current directory takes precedence on Windows.
-        curdir = os.curdir
         if use_bytes:
-            curdir = os.fsencode(curdir)
-        if curdir not in path:
+            path = os.fsencode(path)
+            path = path.split(os.fsencode(os.pathsep))
+        else:
+            path = os.fsdecode(path)
+            path = path.split(os.pathsep)
+
+        if sys.platform == "win32" and _win_path_needs_curdir(cmd, mode):
+            curdir = os.curdir
+            if use_bytes:
+                curdir = os.fsencode(curdir)
             path.insert(0, curdir)
 
+    if sys.platform == "win32":
         # PATHEXT is necessary to check on Windows.
         pathext_source = os.getenv("PATHEXT") or _WIN_DEFAULT_PATHEXT
         pathext = [ext for ext in pathext_source.split(os.pathsep) if ext]
 
         if use_bytes:
             pathext = [os.fsencode(ext) for ext in pathext]
-        # See if the given file matches any of the expected path extensions.
-        # This will allow us to short circuit when given "python.exe".
-        # If it does match, only test that one, otherwise we have to try
-        # others.
-        if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
-            files = [cmd]
-        else:
-            files = [cmd + ext for ext in pathext]
+
+        files = ([cmd] + [cmd + ext for ext in pathext])
+
+        # gh-109590. If we are looking for an executable, we need to look
+        # for a PATHEXT match. The first cmd is the direct match
+        # (e.g. python.exe instead of python)
+        # Check that direct match first if and only if the extension is in PATHEXT
+        # Otherwise check it last
+        suffix = os.path.splitext(files[0])[1].upper()
+        if mode & os.X_OK and not any(suffix == ext.upper() for ext in pathext):
+            files.append(files.pop(0))
     else:
         # On other platforms you don't have things like PATHEXT to tell you
         # what file suffixes are executable, so just pass on cmd as-is.
diff --git a/contrib/tools/python3/src/Lib/site.py b/contrib/tools/python3/src/Lib/site.py
index bce2841b60..ff959de5a6 100644
--- a/contrib/tools/python3/src/Lib/site.py
+++ b/contrib/tools/python3/src/Lib/site.py
@@ -199,11 +199,11 @@ def addpackage(sitedir, name, known_paths):
                 if not dircase in known_paths and os.path.exists(dir):
                     sys.path.append(dir)
                     known_paths.add(dircase)
-            except Exception:
+            except Exception as exc:
                 print("Error processing line {:d} of {}:\n".format(n+1, fullname),
                       file=sys.stderr)
                 import traceback
-                for record in traceback.format_exception(*sys.exc_info()):
+                for record in traceback.format_exception(exc):
                     for line in record.splitlines():
                         print('  '+line, file=sys.stderr)
                 print("\nRemainder of file ignored", file=sys.stderr)
@@ -414,12 +414,7 @@ def setquit():
 def setcopyright():
     """Set 'copyright' and 'credits' in builtins"""
     builtins.copyright = _sitebuiltins._Printer("copyright", sys.copyright)
-    if sys.platform[:4] == 'java':
-        builtins.credits = _sitebuiltins._Printer(
-            "credits",
-            "Jython is maintained by the Jython developers (www.jython.org).")
-    else:
-        builtins.credits = _sitebuiltins._Printer("credits", """\
+    builtins.credits = _sitebuiltins._Printer("credits", """\
     Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands
     for supporting Python development.  See www.python.org for more information.""")
     files, dirs = [], []
@@ -507,20 +502,23 @@ def venv(known_paths):
         executable = sys._base_executable = os.environ['__PYVENV_LAUNCHER__']
     else:
         executable = sys.executable
-    exe_dir, _ = os.path.split(os.path.abspath(executable))
+    exe_dir = os.path.dirname(os.path.abspath(executable))
     site_prefix = os.path.dirname(exe_dir)
     sys._home = None
     conf_basename = 'pyvenv.cfg'
-    candidate_confs = [
-        conffile for conffile in (
-            os.path.join(exe_dir, conf_basename),
-            os.path.join(site_prefix, conf_basename)
+    candidate_conf = next(
+        (
+            conffile for conffile in (
+                os.path.join(exe_dir, conf_basename),
+                os.path.join(site_prefix, conf_basename)
             )
-        if os.path.isfile(conffile)
-        ]
+            if os.path.isfile(conffile)
+        ),
+        None
+    )
 
-    if candidate_confs:
-        virtual_conf = candidate_confs[0]
+    if candidate_conf:
+        virtual_conf = candidate_conf
         system_site = "true"
         # Issue 25185: Use UTF-8, as that's what the venv module uses when
         # writing the file.
diff --git a/contrib/tools/python3/src/Lib/smtpd.py b/contrib/tools/python3/src/Lib/smtpd.py
deleted file mode 100755
index b23579f120..0000000000
--- a/contrib/tools/python3/src/Lib/smtpd.py
+++ /dev/null
@@ -1,885 +0,0 @@
-#! /usr/bin/env python3
-"""An RFC 5321 smtp proxy with optional RFC 1870 and RFC 6531 extensions.
-
-Usage: %(program)s [options] [localhost:localport [remotehost:remoteport]]
-
-Options:
-
-    --nosetuid
-    -n
-        This program generally tries to setuid `nobody', unless this flag is
-        set.  The setuid call will fail if this program is not run as root (in
-        which case, use this flag).
-
-    --version
-    -V
-        Print the version number and exit.
-
-    --class classname
-    -c classname
-        Use `classname' as the concrete SMTP proxy class.  Uses `PureProxy' by
-        default.
-
-    --size limit
-    -s limit
-        Restrict the total size of the incoming message to "limit" number of
-        bytes via the RFC 1870 SIZE extension.  Defaults to 33554432 bytes.
-
-    --smtputf8
-    -u
-        Enable the SMTPUTF8 extension and behave as an RFC 6531 smtp proxy.
-
-    --debug
-    -d
-        Turn on debugging prints.
-
-    --help
-    -h
-        Print this message and exit.
-
-Version: %(__version__)s
-
-If localhost is not given then `localhost' is used, and if localport is not
-given then 8025 is used.  If remotehost is not given then `localhost' is used,
-and if remoteport is not given, then 25 is used.
-"""
-
-# Overview:
-#
-# This file implements the minimal SMTP protocol as defined in RFC 5321.  It
-# has a hierarchy of classes which implement the backend functionality for the
-# smtpd.  A number of classes are provided:
-#
-#   SMTPServer - the base class for the backend.  Raises NotImplementedError
-#   if you try to use it.
-#
-#   DebuggingServer - simply prints each message it receives on stdout.
-#
-#   PureProxy - Proxies all messages to a real smtpd which does final
-#   delivery.  One known problem with this class is that it doesn't handle
-#   SMTP errors from the backend server at all.  This should be fixed
-#   (contributions are welcome!).
-#
-#
-# Author: Barry Warsaw <barry@python.org>
-#
-# TODO:
-#
-# - support mailbox delivery
-# - alias files
-# - Handle more ESMTP extensions
-# - handle error codes from the backend smtpd
-
-import sys
-import os
-import errno
-import getopt
-import time
-import socket
-import collections
-from warnings import _deprecated, warn
-from email._header_value_parser import get_addr_spec, get_angle_addr
-
-__all__ = [
-    "SMTPChannel", "SMTPServer", "DebuggingServer", "PureProxy",
-]
-
-_DEPRECATION_MSG = ('The {name} module is deprecated and unmaintained and will '
-                    'be removed in Python {remove}.  Please see aiosmtpd '
-                    '(https://aiosmtpd.readthedocs.io/) for the recommended '
-                    'replacement.')
-_deprecated(__name__, _DEPRECATION_MSG, remove=(3, 12))
-
-
-# These are imported after the above warning so that users get the correct
-# deprecation warning.
-import asyncore
-import asynchat
-
-
-program = sys.argv[0]
-__version__ = 'Python SMTP proxy version 0.3'
-
-
-class Devnull:
-    def write(self, msg): pass
-    def flush(self): pass
-
-
-DEBUGSTREAM = Devnull()
-NEWLINE = '\n'
-COMMASPACE = ', '
-DATA_SIZE_DEFAULT = 33554432
-
-
-def usage(code, msg=''):
-    print(__doc__ % globals(), file=sys.stderr)
-    if msg:
-        print(msg, file=sys.stderr)
-    sys.exit(code)
-
-
-class SMTPChannel(asynchat.async_chat):
-    COMMAND = 0
-    DATA = 1
-
-    command_size_limit = 512
-    command_size_limits = collections.defaultdict(lambda x=command_size_limit: x)
-
-    @property
-    def max_command_size_limit(self):
-        try:
-            return max(self.command_size_limits.values())
-        except ValueError:
-            return self.command_size_limit
-
-    def __init__(self, server, conn, addr, data_size_limit=DATA_SIZE_DEFAULT,
-                 map=None, enable_SMTPUTF8=False, decode_data=False):
-        asynchat.async_chat.__init__(self, conn, map=map)
-        self.smtp_server = server
-        self.conn = conn
-        self.addr = addr
-        self.data_size_limit = data_size_limit
-        self.enable_SMTPUTF8 = enable_SMTPUTF8
-        self._decode_data = decode_data
-        if enable_SMTPUTF8 and decode_data:
-            raise ValueError("decode_data and enable_SMTPUTF8 cannot"
-                             " be set to True at the same time")
-        if decode_data:
-            self._emptystring = ''
-            self._linesep = '\r\n'
-            self._dotsep = '.'
-            self._newline = NEWLINE
-        else:
-            self._emptystring = b''
-            self._linesep = b'\r\n'
-            self._dotsep = ord(b'.')
-            self._newline = b'\n'
-        self._set_rset_state()
-        self.seen_greeting = ''
-        self.extended_smtp = False
-        self.command_size_limits.clear()
-        self.fqdn = socket.getfqdn()
-        try:
-            self.peer = conn.getpeername()
-        except OSError as err:
-            # a race condition  may occur if the other end is closing
-            # before we can get the peername
-            self.close()
-            if err.errno != errno.ENOTCONN:
-                raise
-            return
-        print('Peer:', repr(self.peer), file=DEBUGSTREAM)
-        self.push('220 %s %s' % (self.fqdn, __version__))
-
-    def _set_post_data_state(self):
-        """Reset state variables to their post-DATA state."""
-        self.smtp_state = self.COMMAND
-        self.mailfrom = None
-        self.rcpttos = []
-        self.require_SMTPUTF8 = False
-        self.num_bytes = 0
-        self.set_terminator(b'\r\n')
-
-    def _set_rset_state(self):
-        """Reset all state variables except the greeting."""
-        self._set_post_data_state()
-        self.received_data = ''
-        self.received_lines = []
-
-
-    # properties for backwards-compatibility
-    @property
-    def __server(self):
-        warn("Access to __server attribute on SMTPChannel is deprecated, "
-            "use 'smtp_server' instead", DeprecationWarning, 2)
-        return self.smtp_server
-    @__server.setter
-    def __server(self, value):
-        warn("Setting __server attribute on SMTPChannel is deprecated, "
-            "set 'smtp_server' instead", DeprecationWarning, 2)
-        self.smtp_server = value
-
-    @property
-    def __line(self):
-        warn("Access to __line attribute on SMTPChannel is deprecated, "
-            "use 'received_lines' instead", DeprecationWarning, 2)
-        return self.received_lines
-    @__line.setter
-    def __line(self, value):
-        warn("Setting __line attribute on SMTPChannel is deprecated, "
-            "set 'received_lines' instead", DeprecationWarning, 2)
-        self.received_lines = value
-
-    @property
-    def __state(self):
-        warn("Access to __state attribute on SMTPChannel is deprecated, "
-            "use 'smtp_state' instead", DeprecationWarning, 2)
-        return self.smtp_state
-    @__state.setter
-    def __state(self, value):
-        warn("Setting __state attribute on SMTPChannel is deprecated, "
-            "set 'smtp_state' instead", DeprecationWarning, 2)
-        self.smtp_state = value
-
-    @property
-    def __greeting(self):
-        warn("Access to __greeting attribute on SMTPChannel is deprecated, "
-            "use 'seen_greeting' instead", DeprecationWarning, 2)
-        return self.seen_greeting
-    @__greeting.setter
-    def __greeting(self, value):
-        warn("Setting __greeting attribute on SMTPChannel is deprecated, "
-            "set 'seen_greeting' instead", DeprecationWarning, 2)
-        self.seen_greeting = value
-
-    @property
-    def __mailfrom(self):
-        warn("Access to __mailfrom attribute on SMTPChannel is deprecated, "
-            "use 'mailfrom' instead", DeprecationWarning, 2)
-        return self.mailfrom
-    @__mailfrom.setter
-    def __mailfrom(self, value):
-        warn("Setting __mailfrom attribute on SMTPChannel is deprecated, "
-            "set 'mailfrom' instead", DeprecationWarning, 2)
-        self.mailfrom = value
-
-    @property
-    def __rcpttos(self):
-        warn("Access to __rcpttos attribute on SMTPChannel is deprecated, "
-            "use 'rcpttos' instead", DeprecationWarning, 2)
-        return self.rcpttos
-    @__rcpttos.setter
-    def __rcpttos(self, value):
-        warn("Setting __rcpttos attribute on SMTPChannel is deprecated, "
-            "set 'rcpttos' instead", DeprecationWarning, 2)
-        self.rcpttos = value
-
-    @property
-    def __data(self):
-        warn("Access to __data attribute on SMTPChannel is deprecated, "
-            "use 'received_data' instead", DeprecationWarning, 2)
-        return self.received_data
-    @__data.setter
-    def __data(self, value):
-        warn("Setting __data attribute on SMTPChannel is deprecated, "
-            "set 'received_data' instead", DeprecationWarning, 2)
-        self.received_data = value
-
-    @property
-    def __fqdn(self):
-        warn("Access to __fqdn attribute on SMTPChannel is deprecated, "
-            "use 'fqdn' instead", DeprecationWarning, 2)
-        return self.fqdn
-    @__fqdn.setter
-    def __fqdn(self, value):
-        warn("Setting __fqdn attribute on SMTPChannel is deprecated, "
-            "set 'fqdn' instead", DeprecationWarning, 2)
-        self.fqdn = value
-
-    @property
-    def __peer(self):
-        warn("Access to __peer attribute on SMTPChannel is deprecated, "
-            "use 'peer' instead", DeprecationWarning, 2)
-        return self.peer
-    @__peer.setter
-    def __peer(self, value):
-        warn("Setting __peer attribute on SMTPChannel is deprecated, "
-            "set 'peer' instead", DeprecationWarning, 2)
-        self.peer = value
-
-    @property
-    def __conn(self):
-        warn("Access to __conn attribute on SMTPChannel is deprecated, "
-            "use 'conn' instead", DeprecationWarning, 2)
-        return self.conn
-    @__conn.setter
-    def __conn(self, value):
-        warn("Setting __conn attribute on SMTPChannel is deprecated, "
-            "set 'conn' instead", DeprecationWarning, 2)
-        self.conn = value
-
-    @property
-    def __addr(self):
-        warn("Access to __addr attribute on SMTPChannel is deprecated, "
-            "use 'addr' instead", DeprecationWarning, 2)
-        return self.addr
-    @__addr.setter
-    def __addr(self, value):
-        warn("Setting __addr attribute on SMTPChannel is deprecated, "
-            "set 'addr' instead", DeprecationWarning, 2)
-        self.addr = value
-
-    # Overrides base class for convenience.
-    def push(self, msg):
-        asynchat.async_chat.push(self, bytes(
-            msg + '\r\n', 'utf-8' if self.require_SMTPUTF8 else 'ascii'))
-
-    # Implementation of base class abstract method
-    def collect_incoming_data(self, data):
-        limit = None
-        if self.smtp_state == self.COMMAND:
-            limit = self.max_command_size_limit
-        elif self.smtp_state == self.DATA:
-            limit = self.data_size_limit
-        if limit and self.num_bytes > limit:
-            return
-        elif limit:
-            self.num_bytes += len(data)
-        if self._decode_data:
-            self.received_lines.append(str(data, 'utf-8'))
-        else:
-            self.received_lines.append(data)
-
-    # Implementation of base class abstract method
-    def found_terminator(self):
-        line = self._emptystring.join(self.received_lines)
-        print('Data:', repr(line), file=DEBUGSTREAM)
-        self.received_lines = []
-        if self.smtp_state == self.COMMAND:
-            sz, self.num_bytes = self.num_bytes, 0
-            if not line:
-                self.push('500 Error: bad syntax')
-                return
-            if not self._decode_data:
-                line = str(line, 'utf-8')
-            i = line.find(' ')
-            if i < 0:
-                command = line.upper()
-                arg = None
-            else:
-                command = line[:i].upper()
-                arg = line[i+1:].strip()
-            max_sz = (self.command_size_limits[command]
-                        if self.extended_smtp else self.command_size_limit)
-            if sz > max_sz:
-                self.push('500 Error: line too long')
-                return
-            method = getattr(self, 'smtp_' + command, None)
-            if not method:
-                self.push('500 Error: command "%s" not recognized' % command)
-                return
-            method(arg)
-            return
-        else:
-            if self.smtp_state != self.DATA:
-                self.push('451 Internal confusion')
-                self.num_bytes = 0
-                return
-            if self.data_size_limit and self.num_bytes > self.data_size_limit:
-                self.push('552 Error: Too much mail data')
-                self.num_bytes = 0
-                return
-            # Remove extraneous carriage returns and de-transparency according
-            # to RFC 5321, Section 4.5.2.
-            data = []
-            for text in line.split(self._linesep):
-                if text and text[0] == self._dotsep:
-                    data.append(text[1:])
-                else:
-                    data.append(text)
-            self.received_data = self._newline.join(data)
-            args = (self.peer, self.mailfrom, self.rcpttos, self.received_data)
-            kwargs = {}
-            if not self._decode_data:
-                kwargs = {
-                    'mail_options': self.mail_options,
-                    'rcpt_options': self.rcpt_options,
-                }
-            status = self.smtp_server.process_message(*args, **kwargs)
-            self._set_post_data_state()
-            if not status:
-                self.push('250 OK')
-            else:
-                self.push(status)
-
-    # SMTP and ESMTP commands
-    def smtp_HELO(self, arg):
-        if not arg:
-            self.push('501 Syntax: HELO hostname')
-            return
-        # See issue #21783 for a discussion of this behavior.
-        if self.seen_greeting:
-            self.push('503 Duplicate HELO/EHLO')
-            return
-        self._set_rset_state()
-        self.seen_greeting = arg
-        self.push('250 %s' % self.fqdn)
-
-    def smtp_EHLO(self, arg):
-        if not arg:
-            self.push('501 Syntax: EHLO hostname')
-            return
-        # See issue #21783 for a discussion of this behavior.
-        if self.seen_greeting:
-            self.push('503 Duplicate HELO/EHLO')
-            return
-        self._set_rset_state()
-        self.seen_greeting = arg
-        self.extended_smtp = True
-        self.push('250-%s' % self.fqdn)
-        if self.data_size_limit:
-            self.push('250-SIZE %s' % self.data_size_limit)
-            self.command_size_limits['MAIL'] += 26
-        if not self._decode_data:
-            self.push('250-8BITMIME')
-        if self.enable_SMTPUTF8:
-            self.push('250-SMTPUTF8')
-            self.command_size_limits['MAIL'] += 10
-        self.push('250 HELP')
-
-    def smtp_NOOP(self, arg):
-        if arg:
-            self.push('501 Syntax: NOOP')
-        else:
-            self.push('250 OK')
-
-    def smtp_QUIT(self, arg):
-        # args is ignored
-        self.push('221 Bye')
-        self.close_when_done()
-
-    def _strip_command_keyword(self, keyword, arg):
-        keylen = len(keyword)
-        if arg[:keylen].upper() == keyword:
-            return arg[keylen:].strip()
-        return ''
-
-    def _getaddr(self, arg):
-        if not arg:
-            return '', ''
-        if arg.lstrip().startswith('<'):
-            address, rest = get_angle_addr(arg)
-        else:
-            address, rest = get_addr_spec(arg)
-        if not address:
-            return address, rest
-        return address.addr_spec, rest
-
-    def _getparams(self, params):
-        # Return params as dictionary. Return None if not all parameters
-        # appear to be syntactically valid according to RFC 1869.
-        result = {}
-        for param in params:
-            param, eq, value = param.partition('=')
-            if not param.isalnum() or eq and not value:
-                return None
-            result[param] = value if eq else True
-        return result
-
-    def smtp_HELP(self, arg):
-        if arg:
-            extended = ' [SP <mail-parameters>]'
-            lc_arg = arg.upper()
-            if lc_arg == 'EHLO':
-                self.push('250 Syntax: EHLO hostname')
-            elif lc_arg == 'HELO':
-                self.push('250 Syntax: HELO hostname')
-            elif lc_arg == 'MAIL':
-                msg = '250 Syntax: MAIL FROM: <address>'
-                if self.extended_smtp:
-                    msg += extended
-                self.push(msg)
-            elif lc_arg == 'RCPT':
-                msg = '250 Syntax: RCPT TO: <address>'
-                if self.extended_smtp:
-                    msg += extended
-                self.push(msg)
-            elif lc_arg == 'DATA':
-                self.push('250 Syntax: DATA')
-            elif lc_arg == 'RSET':
-                self.push('250 Syntax: RSET')
-            elif lc_arg == 'NOOP':
-                self.push('250 Syntax: NOOP')
-            elif lc_arg == 'QUIT':
-                self.push('250 Syntax: QUIT')
-            elif lc_arg == 'VRFY':
-                self.push('250 Syntax: VRFY <address>')
-            else:
-                self.push('501 Supported commands: EHLO HELO MAIL RCPT '
-                          'DATA RSET NOOP QUIT VRFY')
-        else:
-            self.push('250 Supported commands: EHLO HELO MAIL RCPT DATA '
-                      'RSET NOOP QUIT VRFY')
-
-    def smtp_VRFY(self, arg):
-        if arg:
-            address, params = self._getaddr(arg)
-            if address:
-                self.push('252 Cannot VRFY user, but will accept message '
-                          'and attempt delivery')
-            else:
-                self.push('502 Could not VRFY %s' % arg)
-        else:
-            self.push('501 Syntax: VRFY <address>')
-
-    def smtp_MAIL(self, arg):
-        if not self.seen_greeting:
-            self.push('503 Error: send HELO first')
-            return
-        print('===> MAIL', arg, file=DEBUGSTREAM)
-        syntaxerr = '501 Syntax: MAIL FROM: <address>'
-        if self.extended_smtp:
-            syntaxerr += ' [SP <mail-parameters>]'
-        if arg is None:
-            self.push(syntaxerr)
-            return
-        arg = self._strip_command_keyword('FROM:', arg)
-        address, params = self._getaddr(arg)
-        if not address:
-            self.push(syntaxerr)
-            return
-        if not self.extended_smtp and params:
-            self.push(syntaxerr)
-            return
-        if self.mailfrom:
-            self.push('503 Error: nested MAIL command')
-            return
-        self.mail_options = params.upper().split()
-        params = self._getparams(self.mail_options)
-        if params is None:
-            self.push(syntaxerr)
-            return
-        if not self._decode_data:
-            body = params.pop('BODY', '7BIT')
-            if body not in ['7BIT', '8BITMIME']:
-                self.push('501 Error: BODY can only be one of 7BIT, 8BITMIME')
-                return
-        if self.enable_SMTPUTF8:
-            smtputf8 = params.pop('SMTPUTF8', False)
-            if smtputf8 is True:
-                self.require_SMTPUTF8 = True
-            elif smtputf8 is not False:
-                self.push('501 Error: SMTPUTF8 takes no arguments')
-                return
-        size = params.pop('SIZE', None)
-        if size:
-            if not size.isdigit():
-                self.push(syntaxerr)
-                return
-            elif self.data_size_limit and int(size) > self.data_size_limit:
-                self.push('552 Error: message size exceeds fixed maximum message size')
-                return
-        if len(params.keys()) > 0:
-            self.push('555 MAIL FROM parameters not recognized or not implemented')
-            return
-        self.mailfrom = address
-        print('sender:', self.mailfrom, file=DEBUGSTREAM)
-        self.push('250 OK')
-
-    def smtp_RCPT(self, arg):
-        if not self.seen_greeting:
-            self.push('503 Error: send HELO first');
-            return
-        print('===> RCPT', arg, file=DEBUGSTREAM)
-        if not self.mailfrom:
-            self.push('503 Error: need MAIL command')
-            return
-        syntaxerr = '501 Syntax: RCPT TO: <address>'
-        if self.extended_smtp:
-            syntaxerr += ' [SP <mail-parameters>]'
-        if arg is None:
-            self.push(syntaxerr)
-            return
-        arg = self._strip_command_keyword('TO:', arg)
-        address, params = self._getaddr(arg)
-        if not address:
-            self.push(syntaxerr)
-            return
-        if not self.extended_smtp and params:
-            self.push(syntaxerr)
-            return
-        self.rcpt_options = params.upper().split()
-        params = self._getparams(self.rcpt_options)
-        if params is None:
-            self.push(syntaxerr)
-            return
-        # XXX currently there are no options we recognize.
-        if len(params.keys()) > 0:
-            self.push('555 RCPT TO parameters not recognized or not implemented')
-            return
-        self.rcpttos.append(address)
-        print('recips:', self.rcpttos, file=DEBUGSTREAM)
-        self.push('250 OK')
-
-    def smtp_RSET(self, arg):
-        if arg:
-            self.push('501 Syntax: RSET')
-            return
-        self._set_rset_state()
-        self.push('250 OK')
-
-    def smtp_DATA(self, arg):
-        if not self.seen_greeting:
-            self.push('503 Error: send HELO first');
-            return
-        if not self.rcpttos:
-            self.push('503 Error: need RCPT command')
-            return
-        if arg:
-            self.push('501 Syntax: DATA')
-            return
-        self.smtp_state = self.DATA
-        self.set_terminator(b'\r\n.\r\n')
-        self.push('354 End data with <CR><LF>.<CR><LF>')
-
-    # Commands that have not been implemented
-    def smtp_EXPN(self, arg):
-        self.push('502 EXPN not implemented')
-
-
-class SMTPServer(asyncore.dispatcher):
-    # SMTPChannel class to use for managing client connections
-    channel_class = SMTPChannel
-
-    def __init__(self, localaddr, remoteaddr,
-                 data_size_limit=DATA_SIZE_DEFAULT, map=None,
-                 enable_SMTPUTF8=False, decode_data=False):
-        self._localaddr = localaddr
-        self._remoteaddr = remoteaddr
-        self.data_size_limit = data_size_limit
-        self.enable_SMTPUTF8 = enable_SMTPUTF8
-        self._decode_data = decode_data
-        if enable_SMTPUTF8 and decode_data:
-            raise ValueError("decode_data and enable_SMTPUTF8 cannot"
-                             " be set to True at the same time")
-        asyncore.dispatcher.__init__(self, map=map)
-        try:
-            gai_results = socket.getaddrinfo(*localaddr,
-                                             type=socket.SOCK_STREAM)
-            self.create_socket(gai_results[0][0], gai_results[0][1])
-            # try to re-use a server port if possible
-            self.set_reuse_addr()
-            self.bind(localaddr)
-            self.listen(5)
-        except:
-            self.close()
-            raise
-        else:
-            print('%s started at %s\n\tLocal addr: %s\n\tRemote addr:%s' % (
-                self.__class__.__name__, time.ctime(time.time()),
-                localaddr, remoteaddr), file=DEBUGSTREAM)
-
-    def handle_accepted(self, conn, addr):
-        print('Incoming connection from %s' % repr(addr), file=DEBUGSTREAM)
-        channel = self.channel_class(self,
-                                     conn,
-                                     addr,
-                                     self.data_size_limit,
-                                     self._map,
-                                     self.enable_SMTPUTF8,
-                                     self._decode_data)
-
-    # API for "doing something useful with the message"
-    def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
-        """Override this abstract method to handle messages from the client.
-
-        peer is a tuple containing (ipaddr, port) of the client that made the
-        socket connection to our smtp port.
-
-        mailfrom is the raw address the client claims the message is coming
-        from.
-
-        rcpttos is a list of raw addresses the client wishes to deliver the
-        message to.
-
-        data is a string containing the entire full text of the message,
-        headers (if supplied) and all.  It has been `de-transparencied'
-        according to RFC 821, Section 4.5.2.  In other words, a line
-        containing a `.' followed by other text has had the leading dot
-        removed.
-
-        kwargs is a dictionary containing additional information.  It is
-        empty if decode_data=True was given as init parameter, otherwise
-        it will contain the following keys:
-            'mail_options': list of parameters to the mail command.  All
-                            elements are uppercase strings.  Example:
-                            ['BODY=8BITMIME', 'SMTPUTF8'].
-            'rcpt_options': same, for the rcpt command.
-
-        This function should return None for a normal `250 Ok' response;
-        otherwise, it should return the desired response string in RFC 821
-        format.
-
-        """
-        raise NotImplementedError
-
-
-class DebuggingServer(SMTPServer):
-
-    def _print_message_content(self, peer, data):
-        inheaders = 1
-        lines = data.splitlines()
-        for line in lines:
-            # headers first
-            if inheaders and not line:
-                peerheader = 'X-Peer: ' + peer[0]
-                if not isinstance(data, str):
-                    # decoded_data=false; make header match other binary output
-                    peerheader = repr(peerheader.encode('utf-8'))
-                print(peerheader)
-                inheaders = 0
-            if not isinstance(data, str):
-                # Avoid spurious 'str on bytes instance' warning.
-                line = repr(line)
-            print(line)
-
-    def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
-        print('---------- MESSAGE FOLLOWS ----------')
-        if kwargs:
-            if kwargs.get('mail_options'):
-                print('mail options: %s' % kwargs['mail_options'])
-            if kwargs.get('rcpt_options'):
-                print('rcpt options: %s\n' % kwargs['rcpt_options'])
-        self._print_message_content(peer, data)
-        print('------------ END MESSAGE ------------')
-
-
-class PureProxy(SMTPServer):
-    def __init__(self, *args, **kwargs):
-        if 'enable_SMTPUTF8' in kwargs and kwargs['enable_SMTPUTF8']:
-            raise ValueError("PureProxy does not support SMTPUTF8.")
-        super(PureProxy, self).__init__(*args, **kwargs)
-
-    def process_message(self, peer, mailfrom, rcpttos, data):
-        lines = data.split('\n')
-        # Look for the last header
-        i = 0
-        for line in lines:
-            if not line:
-                break
-            i += 1
-        lines.insert(i, 'X-Peer: %s' % peer[0])
-        data = NEWLINE.join(lines)
-        refused = self._deliver(mailfrom, rcpttos, data)
-        # TBD: what to do with refused addresses?
-        print('we got some refusals:', refused, file=DEBUGSTREAM)
-
-    def _deliver(self, mailfrom, rcpttos, data):
-        import smtplib
-        refused = {}
-        try:
-            s = smtplib.SMTP()
-            s.connect(self._remoteaddr[0], self._remoteaddr[1])
-            try:
-                refused = s.sendmail(mailfrom, rcpttos, data)
-            finally:
-                s.quit()
-        except smtplib.SMTPRecipientsRefused as e:
-            print('got SMTPRecipientsRefused', file=DEBUGSTREAM)
-            refused = e.recipients
-        except (OSError, smtplib.SMTPException) as e:
-            print('got', e.__class__, file=DEBUGSTREAM)
-            # All recipients were refused.  If the exception had an associated
-            # error code, use it.  Otherwise,fake it with a non-triggering
-            # exception code.
-            errcode = getattr(e, 'smtp_code', -1)
-            errmsg = getattr(e, 'smtp_error', 'ignore')
-            for r in rcpttos:
-                refused[r] = (errcode, errmsg)
-        return refused
-
-
-class Options:
-    setuid = True
-    classname = 'PureProxy'
-    size_limit = None
-    enable_SMTPUTF8 = False
-
-
-def parseargs():
-    global DEBUGSTREAM
-    try:
-        opts, args = getopt.getopt(
-            sys.argv[1:], 'nVhc:s:du',
-            ['class=', 'nosetuid', 'version', 'help', 'size=', 'debug',
-             'smtputf8'])
-    except getopt.error as e:
-        usage(1, e)
-
-    options = Options()
-    for opt, arg in opts:
-        if opt in ('-h', '--help'):
-            usage(0)
-        elif opt in ('-V', '--version'):
-            print(__version__)
-            sys.exit(0)
-        elif opt in ('-n', '--nosetuid'):
-            options.setuid = False
-        elif opt in ('-c', '--class'):
-            options.classname = arg
-        elif opt in ('-d', '--debug'):
-            DEBUGSTREAM = sys.stderr
-        elif opt in ('-u', '--smtputf8'):
-            options.enable_SMTPUTF8 = True
-        elif opt in ('-s', '--size'):
-            try:
-                int_size = int(arg)
-                options.size_limit = int_size
-            except:
-                print('Invalid size: ' + arg, file=sys.stderr)
-                sys.exit(1)
-
-    # parse the rest of the arguments
-    if len(args) < 1:
-        localspec = 'localhost:8025'
-        remotespec = 'localhost:25'
-    elif len(args) < 2:
-        localspec = args[0]
-        remotespec = 'localhost:25'
-    elif len(args) < 3:
-        localspec = args[0]
-        remotespec = args[1]
-    else:
-        usage(1, 'Invalid arguments: %s' % COMMASPACE.join(args))
-
-    # split into host/port pairs
-    i = localspec.find(':')
-    if i < 0:
-        usage(1, 'Bad local spec: %s' % localspec)
-    options.localhost = localspec[:i]
-    try:
-        options.localport = int(localspec[i+1:])
-    except ValueError:
-        usage(1, 'Bad local port: %s' % localspec)
-    i = remotespec.find(':')
-    if i < 0:
-        usage(1, 'Bad remote spec: %s' % remotespec)
-    options.remotehost = remotespec[:i]
-    try:
-        options.remoteport = int(remotespec[i+1:])
-    except ValueError:
-        usage(1, 'Bad remote port: %s' % remotespec)
-    return options
-
-
-if __name__ == '__main__':
-    options = parseargs()
-    # Become nobody
-    classname = options.classname
-    if "." in classname:
-        lastdot = classname.rfind(".")
-        mod = __import__(classname[:lastdot], globals(), locals(), [""])
-        classname = classname[lastdot+1:]
-    else:
-        import __main__ as mod
-    class_ = getattr(mod, classname)
-    proxy = class_((options.localhost, options.localport),
-                   (options.remotehost, options.remoteport),
-                   options.size_limit, enable_SMTPUTF8=options.enable_SMTPUTF8)
-    if options.setuid:
-        try:
-            import pwd
-        except ImportError:
-            print('Cannot import module "pwd"; try running with -n option.', file=sys.stderr)
-            sys.exit(1)
-        nobody = pwd.getpwnam('nobody')[2]
-        try:
-            os.setuid(nobody)
-        except PermissionError:
-            print('Cannot setuid "nobody"; try running with -n option.', file=sys.stderr)
-            sys.exit(1)
-    try:
-        asyncore.loop()
-    except KeyboardInterrupt:
-        pass
diff --git a/contrib/tools/python3/src/Lib/smtplib.py b/contrib/tools/python3/src/Lib/smtplib.py
index 324a1c19f1..18c91746fd 100755
--- a/contrib/tools/python3/src/Lib/smtplib.py
+++ b/contrib/tools/python3/src/Lib/smtplib.py
@@ -749,14 +749,14 @@ class SMTP:
         # We could not login successfully.  Return result of last attempt.
         raise last_exception
 
-    def starttls(self, keyfile=None, certfile=None, context=None):
+    def starttls(self, *, context=None):
         """Puts the connection to the SMTP server into TLS mode.
 
         If there has been no previous EHLO or HELO command this session, this
         method tries ESMTP EHLO first.
 
         If the server supports TLS, this will encrypt the rest of the SMTP
-        session. If you provide the keyfile and certfile parameters,
+        session. If you provide the context parameter,
         the identity of the SMTP server and client can be checked. This,
         however, depends on whether the socket module really checks the
         certificates.
@@ -774,19 +774,8 @@ class SMTP:
         if resp == 220:
             if not _have_ssl:
                 raise RuntimeError("No SSL support included in this Python")
-            if context is not None and keyfile is not None:
-                raise ValueError("context and keyfile arguments are mutually "
-                                 "exclusive")
-            if context is not None and certfile is not None:
-                raise ValueError("context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom context instead", DeprecationWarning, 2)
             if context is None:
-                context = ssl._create_stdlib_context(certfile=certfile,
-                                                     keyfile=keyfile)
+                context = ssl._create_stdlib_context()
             self.sock = context.wrap_socket(self.sock,
                                             server_hostname=self._host)
             self.file = None
@@ -1017,35 +1006,18 @@ if _have_ssl:
         compiled with SSL support). If host is not specified, '' (the local
         host) is used. If port is omitted, the standard SMTP-over-SSL port
         (465) is used.  local_hostname and source_address have the same meaning
-        as they do in the SMTP class.  keyfile and certfile are also optional -
-        they can contain a PEM formatted private key and certificate chain file
-        for the SSL connection. context also optional, can contain a
-        SSLContext, and is an alternative to keyfile and certfile; If it is
-        specified both keyfile and certfile must be None.
+        as they do in the SMTP class.  context also optional, can contain a
+        SSLContext.
 
         """
 
         default_port = SMTP_SSL_PORT
 
         def __init__(self, host='', port=0, local_hostname=None,
-                     keyfile=None, certfile=None,
-                     timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+                     *, timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
                      source_address=None, context=None):
-            if context is not None and keyfile is not None:
-                raise ValueError("context and keyfile arguments are mutually "
-                                 "exclusive")
-            if context is not None and certfile is not None:
-                raise ValueError("context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom context instead", DeprecationWarning, 2)
-            self.keyfile = keyfile
-            self.certfile = certfile
             if context is None:
-                context = ssl._create_stdlib_context(certfile=certfile,
-                                                     keyfile=keyfile)
+                context = ssl._create_stdlib_context()
             self.context = context
             SMTP.__init__(self, host, port, local_hostname, timeout,
                           source_address)
@@ -1127,10 +1099,7 @@ if __name__ == '__main__':
     toaddrs = prompt("To").split(',')
     print("Enter message, end with ^D:")
     msg = ''
-    while 1:
-        line = sys.stdin.readline()
-        if not line:
-            break
+    while line := sys.stdin.readline():
         msg = msg + line
     print("Message length is %d" % len(msg))
 
diff --git a/contrib/tools/python3/src/Lib/socket.py b/contrib/tools/python3/src/Lib/socket.py
index a0567b76bc..42ee130773 100644
--- a/contrib/tools/python3/src/Lib/socket.py
+++ b/contrib/tools/python3/src/Lib/socket.py
@@ -28,6 +28,7 @@ socket.getdefaulttimeout() -- get the default timeout value
 socket.setdefaulttimeout() -- set the default timeout value
 create_connection() -- connects to an address, with an optional timeout and
                        optional source address.
+create_server() -- create a TCP socket and bind it to a specified address.
 
  [*] not available on all platforms!
 
diff --git a/contrib/tools/python3/src/Lib/socketserver.py b/contrib/tools/python3/src/Lib/socketserver.py
index 30a5cfa59f..cd028ef1c6 100644
--- a/contrib/tools/python3/src/Lib/socketserver.py
+++ b/contrib/tools/python3/src/Lib/socketserver.py
@@ -141,6 +141,8 @@ if hasattr(socket, "AF_UNIX"):
     __all__.extend(["UnixStreamServer","UnixDatagramServer",
                     "ThreadingUnixStreamServer",
                     "ThreadingUnixDatagramServer"])
+    if hasattr(os, "fork"):
+        __all__.extend(["ForkingUnixStreamServer", "ForkingUnixDatagramServer"])
 
 # poll/select have the advantage of not requiring any extra file descriptor,
 # contrarily to epoll/kqueue (also, they require a single syscall).
@@ -292,8 +294,7 @@ class BaseServer:
             selector.register(self, selectors.EVENT_READ)
 
             while True:
-                ready = selector.select(timeout)
-                if ready:
+                if selector.select(timeout):
                     return self._handle_request_noblock()
                 else:
                     if timeout is not None:
@@ -728,6 +729,11 @@ if hasattr(socket, 'AF_UNIX'):
 
     class ThreadingUnixDatagramServer(ThreadingMixIn, UnixDatagramServer): pass
 
+    if hasattr(os, "fork"):
+        class ForkingUnixStreamServer(ForkingMixIn, UnixStreamServer): pass
+
+        class ForkingUnixDatagramServer(ForkingMixIn, UnixDatagramServer): pass
+
 class BaseRequestHandler:
 
     """Base class for request handler classes.
diff --git a/contrib/tools/python3/src/Lib/sqlite3/__init__.py b/contrib/tools/python3/src/Lib/sqlite3/__init__.py
index 5a2dbd360f..927267cf0b 100644
--- a/contrib/tools/python3/src/Lib/sqlite3/__init__.py
+++ b/contrib/tools/python3/src/Lib/sqlite3/__init__.py
@@ -55,17 +55,16 @@ The sqlite3 module is written by Gerhard Häring <gh@ghaering.de>.
 """
 
 from sqlite3.dbapi2 import *
+from sqlite3.dbapi2 import (_deprecated_names,
+                            _deprecated_version_info,
+                            _deprecated_version)
 
 
-# bpo-42264: OptimizedUnicode was deprecated in Python 3.10.  It's scheduled
-# for removal in Python 3.12.
 def __getattr__(name):
-    if name == "OptimizedUnicode":
-        import warnings
-        msg = ("""
-            OptimizedUnicode is deprecated and will be removed in Python 3.12.
-            Since Python 3.3 it has simply been an alias for 'str'.
-        """)
-        warnings.warn(msg, DeprecationWarning, stacklevel=2)
-        return str
-    raise AttributeError(f"module 'sqlite3' has no attribute '{name}'")
+    if name in _deprecated_names:
+        from warnings import warn
+
+        warn(f"{name} is deprecated and will be removed in Python 3.14",
+             DeprecationWarning, stacklevel=2)
+        return globals()[f"_deprecated_{name}"]
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
diff --git a/contrib/tools/python3/src/Lib/sqlite3/__main__.py b/contrib/tools/python3/src/Lib/sqlite3/__main__.py
new file mode 100644
index 0000000000..3b59763375
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/sqlite3/__main__.py
@@ -0,0 +1,127 @@
+"""A simple SQLite CLI for the sqlite3 module.
+
+Apart from using 'argparse' for the command-line interface,
+this module implements the REPL as a thin wrapper around
+the InteractiveConsole class from the 'code' stdlib module.
+"""
+import sqlite3
+import sys
+
+from argparse import ArgumentParser
+from code import InteractiveConsole
+from textwrap import dedent
+
+
+def execute(c, sql, suppress_errors=True):
+    """Helper that wraps execution of SQL code.
+
+    This is used both by the REPL and by direct execution from the CLI.
+
+    'c' may be a cursor or a connection.
+    'sql' is the SQL string to execute.
+    """
+
+    try:
+        for row in c.execute(sql):
+            print(row)
+    except sqlite3.Error as e:
+        tp = type(e).__name__
+        try:
+            print(f"{tp} ({e.sqlite_errorname}): {e}", file=sys.stderr)
+        except AttributeError:
+            print(f"{tp}: {e}", file=sys.stderr)
+        if not suppress_errors:
+            sys.exit(1)
+
+
+class SqliteInteractiveConsole(InteractiveConsole):
+    """A simple SQLite REPL."""
+
+    def __init__(self, connection):
+        super().__init__()
+        self._con = connection
+        self._cur = connection.cursor()
+
+    def runsource(self, source, filename="<input>", symbol="single"):
+        """Override runsource, the core of the InteractiveConsole REPL.
+
+        Return True if more input is needed; buffering is done automatically.
+        Return False is input is a complete statement ready for execution.
+        """
+        match source:
+            case ".version":
+                print(f"{sqlite3.sqlite_version}")
+            case ".help":
+                print("Enter SQL code and press enter.")
+            case ".quit":
+                sys.exit(0)
+            case _:
+                if not sqlite3.complete_statement(source):
+                    return True
+                execute(self._cur, source)
+        return False
+
+
+def main(*args):
+    parser = ArgumentParser(
+        description="Python sqlite3 CLI",
+        prog="python -m sqlite3",
+    )
+    parser.add_argument(
+        "filename", type=str, default=":memory:", nargs="?",
+        help=(
+            "SQLite database to open (defaults to ':memory:'). "
+            "A new database is created if the file does not previously exist."
+        ),
+    )
+    parser.add_argument(
+        "sql", type=str, nargs="?",
+        help=(
+            "An SQL query to execute. "
+            "Any returned rows are printed to stdout."
+        ),
+    )
+    parser.add_argument(
+        "-v", "--version", action="version",
+        version=f"SQLite version {sqlite3.sqlite_version}",
+        help="Print underlying SQLite library version",
+    )
+    args = parser.parse_args(*args)
+
+    if args.filename == ":memory:":
+        db_name = "a transient in-memory database"
+    else:
+        db_name = repr(args.filename)
+
+    # Prepare REPL banner and prompts.
+    if sys.platform == "win32" and "idlelib.run" not in sys.modules:
+        eofkey = "CTRL-Z"
+    else:
+        eofkey = "CTRL-D"
+    banner = dedent(f"""
+        sqlite3 shell, running on SQLite version {sqlite3.sqlite_version}
+        Connected to {db_name}
+
+        Each command will be run using execute() on the cursor.
+        Type ".help" for more information; type ".quit" or {eofkey} to quit.
+    """).strip()
+    sys.ps1 = "sqlite> "
+    sys.ps2 = "    ... "
+
+    con = sqlite3.connect(args.filename, isolation_level=None)
+    try:
+        if args.sql:
+            # SQL statement provided on the command-line; execute it directly.
+            execute(con, args.sql, suppress_errors=False)
+        else:
+            # No SQL provided; start the REPL.
+            console = SqliteInteractiveConsole(con)
+            console.interact(banner, exitmsg="")
+    finally:
+        con.close()
+
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    main(sys.argv[1:])
diff --git a/contrib/tools/python3/src/Lib/sqlite3/dbapi2.py b/contrib/tools/python3/src/Lib/sqlite3/dbapi2.py
index 7cf4dd32d5..56fc0461e6 100644
--- a/contrib/tools/python3/src/Lib/sqlite3/dbapi2.py
+++ b/contrib/tools/python3/src/Lib/sqlite3/dbapi2.py
@@ -25,6 +25,9 @@ import time
 import collections.abc
 
 from _sqlite3 import *
+from _sqlite3 import _deprecated_version
+
+_deprecated_names = frozenset({"version", "version_info"})
 
 paramstyle = "qmark"
 
@@ -45,23 +48,32 @@ def TimeFromTicks(ticks):
 def TimestampFromTicks(ticks):
     return Timestamp(*time.localtime(ticks)[:6])
 
-version_info = tuple([int(x) for x in version.split(".")])
+_deprecated_version_info = tuple(map(int, _deprecated_version.split(".")))
 sqlite_version_info = tuple([int(x) for x in sqlite_version.split(".")])
 
 Binary = memoryview
 collections.abc.Sequence.register(Row)
 
 def register_adapters_and_converters():
+    from warnings import warn
+
+    msg = ("The default {what} is deprecated as of Python 3.12; "
+           "see the sqlite3 documentation for suggested replacement recipes")
+
     def adapt_date(val):
+        warn(msg.format(what="date adapter"), DeprecationWarning, stacklevel=2)
         return val.isoformat()
 
     def adapt_datetime(val):
+        warn(msg.format(what="datetime adapter"), DeprecationWarning, stacklevel=2)
         return val.isoformat(" ")
 
     def convert_date(val):
+        warn(msg.format(what="date converter"), DeprecationWarning, stacklevel=2)
         return datetime.date(*map(int, val.split(b"-")))
 
     def convert_timestamp(val):
+        warn(msg.format(what="timestamp converter"), DeprecationWarning, stacklevel=2)
         datepart, timepart = val.split(b" ")
         year, month, day = map(int, datepart.split(b"-"))
         timepart_full = timepart.split(b".")
@@ -82,20 +94,15 @@ def register_adapters_and_converters():
 
 register_adapters_and_converters()
 
-# bpo-24464: enable_shared_cache was deprecated in Python 3.10.  It's
-# scheduled for removal in Python 3.12.
-def enable_shared_cache(enable):
-    from _sqlite3 import enable_shared_cache as _old_enable_shared_cache
-    import warnings
-    msg = (
-        "enable_shared_cache is deprecated and will be removed in Python 3.12. "
-        "Shared cache is strongly discouraged by the SQLite 3 documentation. "
-        "If shared cache must be used, open the database in URI mode using"
-        "the cache=shared query parameter."
-    )
-    warnings.warn(msg, DeprecationWarning, stacklevel=2)
-    return _old_enable_shared_cache(enable)
-
 # Clean up namespace
 
 del(register_adapters_and_converters)
+
+def __getattr__(name):
+    if name in _deprecated_names:
+        from warnings import warn
+
+        warn(f"{name} is deprecated and will be removed in Python 3.14",
+             DeprecationWarning, stacklevel=2)
+        return globals()[f"_deprecated_{name}"]
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
diff --git a/contrib/tools/python3/src/Lib/ssl.py b/contrib/tools/python3/src/Lib/ssl.py
index ba4e47acf9..9c1fea6d36 100644
--- a/contrib/tools/python3/src/Lib/ssl.py
+++ b/contrib/tools/python3/src/Lib/ssl.py
@@ -106,7 +106,7 @@ from _ssl import (
     SSLSyscallError, SSLEOFError, SSLCertVerificationError
     )
 from _ssl import txt2obj as _txt2obj, nid2obj as _nid2obj
-from _ssl import RAND_status, RAND_add, RAND_bytes, RAND_pseudo_bytes
+from _ssl import RAND_status, RAND_add, RAND_bytes
 try:
     from _ssl import RAND_egd
 except ImportError:
@@ -373,68 +373,6 @@ def _ipaddress_match(cert_ipaddress, host_ip):
     return ip == host_ip
 
 
-def match_hostname(cert, hostname):
-    """Verify that *cert* (in decoded format as returned by
-    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
-    rules are followed.
-
-    The function matches IP addresses rather than dNSNames if hostname is a
-    valid ipaddress string. IPv4 addresses are supported on all platforms.
-    IPv6 addresses are supported on platforms with IPv6 support (AF_INET6
-    and inet_pton).
-
-    CertificateError is raised on failure. On success, the function
-    returns nothing.
-    """
-    warnings.warn(
-        "ssl.match_hostname() is deprecated",
-        category=DeprecationWarning,
-        stacklevel=2
-    )
-    if not cert:
-        raise ValueError("empty or no certificate, match_hostname needs a "
-                         "SSL socket or SSL context with either "
-                         "CERT_OPTIONAL or CERT_REQUIRED")
-    try:
-        host_ip = _inet_paton(hostname)
-    except ValueError:
-        # Not an IP address (common case)
-        host_ip = None
-    dnsnames = []
-    san = cert.get('subjectAltName', ())
-    for key, value in san:
-        if key == 'DNS':
-            if host_ip is None and _dnsname_match(value, hostname):
-                return
-            dnsnames.append(value)
-        elif key == 'IP Address':
-            if host_ip is not None and _ipaddress_match(value, host_ip):
-                return
-            dnsnames.append(value)
-    if not dnsnames:
-        # The subject is only checked when there is no dNSName entry
-        # in subjectAltName
-        for sub in cert.get('subject', ()):
-            for key, value in sub:
-                # XXX according to RFC 2818, the most specific Common Name
-                # must be used.
-                if key == 'commonName':
-                    if _dnsname_match(value, hostname):
-                        return
-                    dnsnames.append(value)
-    if len(dnsnames) > 1:
-        raise CertificateError("hostname %r "
-            "doesn't match either of %s"
-            % (hostname, ', '.join(map(repr, dnsnames))))
-    elif len(dnsnames) == 1:
-        raise CertificateError("hostname %r "
-            "doesn't match %r"
-            % (hostname, dnsnames[0]))
-    else:
-        raise CertificateError("no appropriate commonName or "
-            "subjectAltName fields were found")
-
-
 DefaultVerifyPaths = namedtuple("DefaultVerifyPaths",
     "cafile capath openssl_cafile_env openssl_cafile openssl_capath_env "
     "openssl_capath")
@@ -1472,36 +1410,6 @@ SSLContext.sslsocket_class = SSLSocket
 SSLContext.sslobject_class = SSLObject
 
 
-def wrap_socket(sock, keyfile=None, certfile=None,
-                server_side=False, cert_reqs=CERT_NONE,
-                ssl_version=PROTOCOL_TLS, ca_certs=None,
-                do_handshake_on_connect=True,
-                suppress_ragged_eofs=True,
-                ciphers=None):
-    warnings.warn(
-        "ssl.wrap_socket() is deprecated, use SSLContext.wrap_socket()",
-        category=DeprecationWarning,
-        stacklevel=2
-    )
-    if server_side and not certfile:
-        raise ValueError("certfile must be specified for server-side "
-                         "operations")
-    if keyfile and not certfile:
-        raise ValueError("certfile must be specified")
-    context = SSLContext(ssl_version)
-    context.verify_mode = cert_reqs
-    if ca_certs:
-        context.load_verify_locations(ca_certs)
-    if certfile:
-        context.load_cert_chain(certfile, keyfile)
-    if ciphers:
-        context.set_ciphers(ciphers)
-    return context.wrap_socket(
-        sock=sock, server_side=server_side,
-        do_handshake_on_connect=do_handshake_on_connect,
-        suppress_ragged_eofs=suppress_ragged_eofs
-    )
-
 # some utility functions
 
 def cert_time_to_seconds(cert_time):
diff --git a/contrib/tools/python3/src/Lib/statistics.py b/contrib/tools/python3/src/Lib/statistics.py
index 3b3b43babb..6bd214bbfe 100644
--- a/contrib/tools/python3/src/Lib/statistics.py
+++ b/contrib/tools/python3/src/Lib/statistics.py
@@ -134,11 +134,11 @@ import sys
 
 from fractions import Fraction
 from decimal import Decimal
-from itertools import groupby, repeat
+from itertools import count, groupby, repeat
 from bisect import bisect_left, bisect_right
-from math import hypot, sqrt, fabs, exp, erf, tau, log, fsum
+from math import hypot, sqrt, fabs, exp, erf, tau, log, fsum, sumprod
 from functools import reduce
-from operator import mul
+from operator import itemgetter
 from collections import Counter, namedtuple, defaultdict
 
 _SQRT2 = sqrt(2.0)
@@ -356,6 +356,60 @@ def _fail_neg(values, errmsg='negative value'):
         yield x
 
 
+def _rank(data, /, *, key=None, reverse=False, ties='average', start=1) -> list[float]:
+    """Rank order a dataset. The lowest value has rank 1.
+
+    Ties are averaged so that equal values receive the same rank:
+
+        >>> data = [31, 56, 31, 25, 75, 18]
+        >>> _rank(data)
+        [3.5, 5.0, 3.5, 2.0, 6.0, 1.0]
+
+    The operation is idempotent:
+
+        >>> _rank([3.5, 5.0, 3.5, 2.0, 6.0, 1.0])
+        [3.5, 5.0, 3.5, 2.0, 6.0, 1.0]
+
+    It is possible to rank the data in reverse order so that the
+    highest value has rank 1.  Also, a key-function can extract
+    the field to be ranked:
+
+        >>> goals = [('eagles', 45), ('bears', 48), ('lions', 44)]
+        >>> _rank(goals, key=itemgetter(1), reverse=True)
+        [2.0, 1.0, 3.0]
+
+    Ranks are conventionally numbered starting from one; however,
+    setting *start* to zero allows the ranks to be used as array indices:
+
+        >>> prize = ['Gold', 'Silver', 'Bronze', 'Certificate']
+        >>> scores = [8.1, 7.3, 9.4, 8.3]
+        >>> [prize[int(i)] for i in _rank(scores, start=0, reverse=True)]
+        ['Bronze', 'Certificate', 'Gold', 'Silver']
+
+    """
+    # If this function becomes public at some point, more thought
+    # needs to be given to the signature.  A list of ints is
+    # plausible when ties is "min" or "max".  When ties is "average",
+    # either list[float] or list[Fraction] is plausible.
+
+    # Default handling of ties matches scipy.stats.mstats.spearmanr.
+    if ties != 'average':
+        raise ValueError(f'Unknown tie resolution method: {ties!r}')
+    if key is not None:
+        data = map(key, data)
+    val_pos = sorted(zip(data, count()), reverse=reverse)
+    i = start - 1
+    result = [0] * len(val_pos)
+    for _, g in groupby(val_pos, key=itemgetter(0)):
+        group = list(g)
+        size = len(group)
+        rank = i + (size + 1) / 2
+        for value, orig_pos in group:
+            result[orig_pos] = rank
+        i += size
+    return result
+
+
 def _integer_sqrt_of_frac_rto(n: int, m: int) -> int:
     """Square root of n/m, rounded to the nearest integer using round-to-odd."""
     # Reference: https://www.lri.fr/~melquion/doc/05-imacs17_1-expose.pdf
@@ -442,28 +496,26 @@ def fmean(data, weights=None):
     >>> fmean([3.5, 4.0, 5.25])
     4.25
     """
-    try:
-        n = len(data)
-    except TypeError:
-        # Handle iterators that do not define __len__().
-        n = 0
-        def count(iterable):
-            nonlocal n
-            for n, x in enumerate(iterable, start=1):
-                yield x
-        data = count(data)
     if weights is None:
+        try:
+            n = len(data)
+        except TypeError:
+            # Handle iterators that do not define __len__().
+            n = 0
+            def count(iterable):
+                nonlocal n
+                for n, x in enumerate(iterable, start=1):
+                    yield x
+            data = count(data)
         total = fsum(data)
         if not n:
             raise StatisticsError('fmean requires at least one data point')
         return total / n
-    try:
-        num_weights = len(weights)
-    except TypeError:
+    if not isinstance(weights, (list, tuple)):
         weights = list(weights)
-        num_weights = len(weights)
-    num = fsum(map(mul, data, weights))
-    if n != num_weights:
+    try:
+        num = sumprod(data, weights)
+    except ValueError:
         raise StatisticsError('data and weights must be the same length')
     den = fsum(weights)
     if not den:
@@ -984,18 +1036,16 @@ def covariance(x, y, /):
         raise StatisticsError('covariance requires at least two data points')
     xbar = fsum(x) / n
     ybar = fsum(y) / n
-    sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
+    sxy = sumprod((xi - xbar for xi in x), (yi - ybar for yi in y))
     return sxy / (n - 1)
 
 
-def correlation(x, y, /):
+def correlation(x, y, /, *, method='linear'):
     """Pearson's correlation coefficient
 
     Return the Pearson's correlation coefficient for two inputs. Pearson's
-    correlation coefficient *r* takes values between -1 and +1. It measures the
-    strength and direction of the linear relationship, where +1 means very
-    strong, positive linear relationship, -1 very strong, negative linear
-    relationship, and 0 no linear relationship.
+    correlation coefficient *r* takes values between -1 and +1. It measures
+    the strength and direction of a linear relationship.
 
     >>> x = [1, 2, 3, 4, 5, 6, 7, 8, 9]
     >>> y = [9, 8, 7, 6, 5, 4, 3, 2, 1]
@@ -1004,17 +1054,34 @@ def correlation(x, y, /):
     >>> correlation(x, y)
     -1.0
 
+    If *method* is "ranked", computes Spearman's rank correlation coefficient
+    for two inputs.  The data is replaced by ranks.  Ties are averaged
+    so that equal values receive the same rank.  The resulting coefficient
+    measures the strength of a monotonic relationship.
+
+    Spearman's rank correlation coefficient is appropriate for ordinal
+    data or for continuous data that doesn't meet the linear proportion
+    requirement for Pearson's correlation coefficient.
     """
     n = len(x)
     if len(y) != n:
         raise StatisticsError('correlation requires that both inputs have same number of data points')
     if n < 2:
         raise StatisticsError('correlation requires at least two data points')
-    xbar = fsum(x) / n
-    ybar = fsum(y) / n
-    sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
-    sxx = fsum((d := xi - xbar) * d for xi in x)
-    syy = fsum((d := yi - ybar) * d for yi in y)
+    if method not in {'linear', 'ranked'}:
+        raise ValueError(f'Unknown method: {method!r}')
+    if method == 'ranked':
+        start = (n - 1) / -2            # Center rankings around zero
+        x = _rank(x, start=start)
+        y = _rank(y, start=start)
+    else:
+        xbar = fsum(x) / n
+        ybar = fsum(y) / n
+        x = [xi - xbar for xi in x]
+        y = [yi - ybar for yi in y]
+    sxy = sumprod(x, y)
+    sxx = sumprod(x, x)
+    syy = sumprod(y, y)
     try:
         return sxy / sqrt(sxx * syy)
     except ZeroDivisionError:
@@ -1067,14 +1134,13 @@ def linear_regression(x, y, /, *, proportional=False):
         raise StatisticsError('linear regression requires that both inputs have same number of data points')
     if n < 2:
         raise StatisticsError('linear regression requires at least two data points')
-    if proportional:
-        sxy = fsum(xi * yi for xi, yi in zip(x, y))
-        sxx = fsum(xi * xi for xi in x)
-    else:
+    if not proportional:
         xbar = fsum(x) / n
         ybar = fsum(y) / n
-        sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
-        sxx = fsum((d := xi - xbar) * d for xi in x)
+        x = [xi - xbar for xi in x]  # List because used three times below
+        y = (yi - ybar for yi in y)  # Generator because only used once below
+    sxy = sumprod(x, y) + 0.0        # Add zero to coerce result to a float
+    sxx = sumprod(x, x)
     try:
         slope = sxy / sxx   # equivalent to:  covariance(x, y) / variance(x)
     except ZeroDivisionError:
@@ -1193,7 +1259,7 @@ class NormalDist:
         "Generate *n* samples for a given mean and standard deviation."
         gauss = random.gauss if seed is None else random.Random(seed).gauss
         mu, sigma = self._mu, self._sigma
-        return [gauss(mu, sigma) for i in range(n)]
+        return [gauss(mu, sigma) for _ in repeat(None, n)]
 
     def pdf(self, x):
         "Probability density function.  P(x <= X < x+dx) / dx"
@@ -1221,8 +1287,6 @@ class NormalDist:
         """
         if p <= 0.0 or p >= 1.0:
             raise StatisticsError('p must be in the range 0.0 < p < 1.0')
-        if self._sigma <= 0.0:
-            raise StatisticsError('cdf() not defined when sigma at or below zero')
         return _normal_dist_inv_cdf(p, self._mu, self._sigma)
 
     def quantiles(self, n=4):
diff --git a/contrib/tools/python3/src/Lib/sunau.py b/contrib/tools/python3/src/Lib/sunau.py
index 94c42f1582..c6caab959a 100644
--- a/contrib/tools/python3/src/Lib/sunau.py
+++ b/contrib/tools/python3/src/Lib/sunau.py
@@ -160,7 +160,7 @@ def _write_u32(file, x):
 class Au_read:
 
     def __init__(self, f):
-        if type(f) == type(''):
+        if isinstance(f, str):
             import builtins
             f = builtins.open(f, 'rb')
             self._opened = True
@@ -312,7 +312,7 @@ class Au_read:
 class Au_write:
 
     def __init__(self, f):
-        if type(f) == type(''):
+        if isinstance(f, str):
             import builtins
             f = builtins.open(f, 'wb')
             self._opened = True
diff --git a/contrib/tools/python3/src/Lib/symtable.py b/contrib/tools/python3/src/Lib/symtable.py
index 5dd71ffc6b..4b0bc6f497 100644
--- a/contrib/tools/python3/src/Lib/symtable.py
+++ b/contrib/tools/python3/src/Lib/symtable.py
@@ -62,8 +62,8 @@ class SymbolTable:
     def get_type(self):
         """Return the type of the symbol table.
 
-        The values returned are 'class', 'module' and
-        'function'.
+        The values returned are 'class', 'module', 'function',
+        'annotation', 'TypeVar bound', 'type alias', and 'type parameter'.
         """
         if self._table.type == _symtable.TYPE_MODULE:
             return "module"
@@ -71,8 +71,15 @@ class SymbolTable:
             return "function"
         if self._table.type == _symtable.TYPE_CLASS:
             return "class"
-        assert self._table.type in (1, 2, 3), \
-               "unexpected type: {0}".format(self._table.type)
+        if self._table.type == _symtable.TYPE_ANNOTATION:
+            return "annotation"
+        if self._table.type == _symtable.TYPE_TYPE_VAR_BOUND:
+            return "TypeVar bound"
+        if self._table.type == _symtable.TYPE_TYPE_ALIAS:
+            return "type alias"
+        if self._table.type == _symtable.TYPE_TYPE_PARAM:
+            return "type parameter"
+        assert False, f"unexpected type: {self._table.type}"
 
     def get_id(self):
         """Return an identifier for the table.
diff --git a/contrib/tools/python3/src/Lib/sysconfig.py b/contrib/tools/python3/src/Lib/sysconfig.py
index 0070286b57..4fd5fbaab5 100644
--- a/contrib/tools/python3/src/Lib/sysconfig.py
+++ b/contrib/tools/python3/src/Lib/sysconfig.py
@@ -2,7 +2,8 @@
 
 import os
 import sys
-from os.path import pardir, realpath
+import threading
+from os.path import realpath
 
 __all__ = [
     'get_config_h_filename',
@@ -172,7 +173,11 @@ _PREFIX = os.path.normpath(sys.prefix)
 _BASE_PREFIX = os.path.normpath(sys.base_prefix)
 _EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
 _BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
+# Mutex guarding initialization of _CONFIG_VARS.
+_CONFIG_VARS_LOCK = threading.RLock()
 _CONFIG_VARS = None
+# True iff _CONFIG_VARS has been fully initialized.
+_CONFIG_VARS_INITIALIZED = False
 _USER_BASE = None
 
 # Regexes needed for parsing Makefile (and similar syntaxes,
@@ -539,7 +544,12 @@ def _init_non_posix(vars):
     vars['LIBDEST'] = get_path('stdlib')
     vars['BINLIBDEST'] = get_path('platstdlib')
     vars['INCLUDEPY'] = get_path('include')
-    vars['EXT_SUFFIX'] = _imp.extension_suffixes()[0]
+    try:
+        # GH-99201: _imp.extension_suffixes may be empty when
+        # HAVE_DYNAMIC_LOADING is not set. In this case, don't set EXT_SUFFIX.
+        vars['EXT_SUFFIX'] = _imp.extension_suffixes()[0]
+    except IndexError:
+        pass
     vars['EXE'] = '.exe'
     vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
     vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
@@ -626,6 +636,71 @@ def get_path(name, scheme=get_default_scheme(), vars=None, expand=True):
     return get_paths(scheme, vars, expand)[name]
 
 
+def _init_config_vars():
+    global _CONFIG_VARS
+    _CONFIG_VARS = {}
+    # Normalized versions of prefix and exec_prefix are handy to have;
+    # in fact, these are the standard versions used most places in the
+    # Distutils.
+    _CONFIG_VARS['prefix'] = _PREFIX
+    _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
+    _CONFIG_VARS['py_version'] = _PY_VERSION
+    _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
+    _CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT
+    _CONFIG_VARS['installed_base'] = _BASE_PREFIX
+    _CONFIG_VARS['base'] = _PREFIX
+    _CONFIG_VARS['installed_platbase'] = _BASE_EXEC_PREFIX
+    _CONFIG_VARS['platbase'] = _EXEC_PREFIX
+    _CONFIG_VARS['projectbase'] = _PROJECT_BASE
+    _CONFIG_VARS['platlibdir'] = sys.platlibdir
+    try:
+        _CONFIG_VARS['abiflags'] = sys.abiflags
+    except AttributeError:
+        # sys.abiflags may not be defined on all platforms.
+        _CONFIG_VARS['abiflags'] = ''
+    try:
+        _CONFIG_VARS['py_version_nodot_plat'] = sys.winver.replace('.', '')
+    except AttributeError:
+        _CONFIG_VARS['py_version_nodot_plat'] = ''
+
+    if os.name == 'nt':
+        _init_non_posix(_CONFIG_VARS)
+        _CONFIG_VARS['VPATH'] = sys._vpath
+    if os.name == 'posix':
+        _init_posix(_CONFIG_VARS)
+    if _HAS_USER_BASE:
+        # Setting 'userbase' is done below the call to the
+        # init function to enable using 'get_config_var' in
+        # the init-function.
+        _CONFIG_VARS['userbase'] = _getuserbase()
+
+    # Always convert srcdir to an absolute path
+    srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
+    if os.name == 'posix':
+        if _PYTHON_BUILD:
+            # If srcdir is a relative path (typically '.' or '..')
+            # then it should be interpreted relative to the directory
+            # containing Makefile.
+            base = os.path.dirname(get_makefile_filename())
+            srcdir = os.path.join(base, srcdir)
+        else:
+            # srcdir is not meaningful since the installation is
+            # spread about the filesystem.  We choose the
+            # directory containing the Makefile since we know it
+            # exists.
+            srcdir = os.path.dirname(get_makefile_filename())
+    _CONFIG_VARS['srcdir'] = _safe_realpath(srcdir)
+
+    # OS X platforms require special customization to handle
+    # multi-architecture, multi-os-version installers
+    if sys.platform == 'darwin':
+        import _osx_support
+        _osx_support.customize_config_vars(_CONFIG_VARS)
+
+    global _CONFIG_VARS_INITIALIZED
+    _CONFIG_VARS_INITIALIZED = True
+
+
 def get_config_vars(*args):
     """With no arguments, return a dictionary of all configuration
     variables relevant for the current platform.
@@ -636,66 +711,16 @@ def get_config_vars(*args):
     With arguments, return a list of values that result from looking up
     each argument in the configuration variable dictionary.
     """
-    global _CONFIG_VARS
-    if _CONFIG_VARS is None:
-        _CONFIG_VARS = {}
-        # Normalized versions of prefix and exec_prefix are handy to have;
-        # in fact, these are the standard versions used most places in the
-        # Distutils.
-        _CONFIG_VARS['prefix'] = _PREFIX
-        _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
-        _CONFIG_VARS['py_version'] = _PY_VERSION
-        _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
-        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT
-        _CONFIG_VARS['installed_base'] = _BASE_PREFIX
-        _CONFIG_VARS['base'] = _PREFIX
-        _CONFIG_VARS['installed_platbase'] = _BASE_EXEC_PREFIX
-        _CONFIG_VARS['platbase'] = _EXEC_PREFIX
-        _CONFIG_VARS['projectbase'] = _PROJECT_BASE
-        _CONFIG_VARS['platlibdir'] = sys.platlibdir
-        try:
-            _CONFIG_VARS['abiflags'] = sys.abiflags
-        except AttributeError:
-            # sys.abiflags may not be defined on all platforms.
-            _CONFIG_VARS['abiflags'] = ''
-        try:
-            _CONFIG_VARS['py_version_nodot_plat'] = sys.winver.replace('.', '')
-        except AttributeError:
-            _CONFIG_VARS['py_version_nodot_plat'] = ''
-
-        if os.name == 'nt':
-            _init_non_posix(_CONFIG_VARS)
-            _CONFIG_VARS['VPATH'] = sys._vpath
-        if os.name == 'posix':
-            _init_posix(_CONFIG_VARS)
-        if _HAS_USER_BASE:
-            # Setting 'userbase' is done below the call to the
-            # init function to enable using 'get_config_var' in
-            # the init-function.
-            _CONFIG_VARS['userbase'] = _getuserbase()
-
-        # Always convert srcdir to an absolute path
-        srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
-        if os.name == 'posix':
-            if _PYTHON_BUILD:
-                # If srcdir is a relative path (typically '.' or '..')
-                # then it should be interpreted relative to the directory
-                # containing Makefile.
-                base = os.path.dirname(get_makefile_filename())
-                srcdir = os.path.join(base, srcdir)
-            else:
-                # srcdir is not meaningful since the installation is
-                # spread about the filesystem.  We choose the
-                # directory containing the Makefile since we know it
-                # exists.
-                srcdir = os.path.dirname(get_makefile_filename())
-        _CONFIG_VARS['srcdir'] = _safe_realpath(srcdir)
-
-        # OS X platforms require special customization to handle
-        # multi-architecture, multi-os-version installers
-        if sys.platform == 'darwin':
-            import _osx_support
-            _osx_support.customize_config_vars(_CONFIG_VARS)
+
+    # Avoid claiming the lock once initialization is complete.
+    if not _CONFIG_VARS_INITIALIZED:
+        with _CONFIG_VARS_LOCK:
+            # Test again with the lock held to avoid races. Note that
+            # we test _CONFIG_VARS here, not _CONFIG_VARS_INITIALIZED,
+            # to ensure that recursive calls to get_config_vars()
+            # don't re-enter init_config_vars().
+            if _CONFIG_VARS is None:
+                _init_config_vars()
 
     if args:
         vals = []
diff --git a/contrib/tools/python3/src/Lib/tabnanny.py b/contrib/tools/python3/src/Lib/tabnanny.py
index a47f5a96b8..e2ac6837f1 100755
--- a/contrib/tools/python3/src/Lib/tabnanny.py
+++ b/contrib/tools/python3/src/Lib/tabnanny.py
@@ -35,6 +35,7 @@ def errprint(*args):
         sys.stderr.write(sep + str(arg))
         sep = " "
     sys.stderr.write("\n")
+    sys.exit(1)
 
 def main():
     import getopt
@@ -44,7 +45,6 @@ def main():
         opts, args = getopt.getopt(sys.argv[1:], "qv")
     except getopt.error as msg:
         errprint(msg)
-        return
     for o, a in opts:
         if o == '-q':
             filename_only = filename_only + 1
@@ -52,7 +52,6 @@ def main():
             verbose = verbose + 1
     if not args:
         errprint("Usage:", sys.argv[0], "[-v] file_or_directory ...")
-        return
     for arg in args:
         check(arg)
 
@@ -108,6 +107,10 @@ def check(file):
         errprint("%r: Token Error: %s" % (file, msg))
         return
 
+    except SyntaxError as msg:
+        errprint("%r: Token Error: %s" % (file, msg))
+        return
+
     except IndentationError as msg:
         errprint("%r: Indentation Error: %s" % (file, msg))
         return
@@ -273,6 +276,12 @@ def format_witnesses(w):
     return prefix + " " + ', '.join(firsts)
 
 def process_tokens(tokens):
+    try:
+        _process_tokens(tokens)
+    except TabError as e:
+        raise NannyNag(e.lineno, e.msg, e.text)
+
+def _process_tokens(tokens):
     INDENT = tokenize.INDENT
     DEDENT = tokenize.DEDENT
     NEWLINE = tokenize.NEWLINE
diff --git a/contrib/tools/python3/src/Lib/tarfile.py b/contrib/tools/python3/src/Lib/tarfile.py
index 612217b1ad..3bbbcaa621 100755
--- a/contrib/tools/python3/src/Lib/tarfile.py
+++ b/contrib/tools/python3/src/Lib/tarfile.py
@@ -58,19 +58,18 @@ except ImportError:
     grp = None
 
 # os.symlink on Windows prior to 6.0 raises NotImplementedError
-symlink_exception = (AttributeError, NotImplementedError)
-try:
-    # OSError (winerror=1314) will be raised if the caller does not hold the
-    # SeCreateSymbolicLinkPrivilege privilege
-    symlink_exception += (OSError,)
-except NameError:
-    pass
+# OSError (winerror=1314) will be raised if the caller does not hold the
+# SeCreateSymbolicLinkPrivilege privilege
+symlink_exception = (AttributeError, NotImplementedError, OSError)
 
 # from tarfile import *
 __all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError", "ReadError",
            "CompressionError", "StreamError", "ExtractError", "HeaderError",
            "ENCODING", "USTAR_FORMAT", "GNU_FORMAT", "PAX_FORMAT",
-           "DEFAULT_FORMAT", "open"]
+           "DEFAULT_FORMAT", "open","fully_trusted_filter", "data_filter",
+           "tar_filter", "FilterError", "AbsoluteLinkError",
+           "OutsideDestinationError", "SpecialFileError", "AbsolutePathError",
+           "LinkOutsideDestinationError"]
 
 
 #---------------------------------------------------------
@@ -341,7 +340,8 @@ class _Stream:
        _Stream is intended to be used only internally.
     """
 
-    def __init__(self, name, mode, comptype, fileobj, bufsize):
+    def __init__(self, name, mode, comptype, fileobj, bufsize,
+                 compresslevel):
         """Construct a _Stream object.
         """
         self._extfileobj = True
@@ -376,7 +376,7 @@ class _Stream:
                     self.exception = zlib.error
                     self._init_read_gz()
                 else:
-                    self._init_write_gz()
+                    self._init_write_gz(compresslevel)
 
             elif comptype == "bz2":
                 try:
@@ -388,7 +388,7 @@ class _Stream:
                     self.cmp = bz2.BZ2Decompressor()
                     self.exception = OSError
                 else:
-                    self.cmp = bz2.BZ2Compressor()
+                    self.cmp = bz2.BZ2Compressor(compresslevel)
 
             elif comptype == "xz":
                 try:
@@ -415,13 +415,14 @@ class _Stream:
         if hasattr(self, "closed") and not self.closed:
             self.close()
 
-    def _init_write_gz(self):
+    def _init_write_gz(self, compresslevel):
         """Initialize for writing with gzip compression.
         """
-        self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,
-                                            -self.zlib.MAX_WBITS,
-                                            self.zlib.DEF_MEM_LEVEL,
-                                            0)
+        self.cmp = self.zlib.compressobj(compresslevel,
+                                         self.zlib.DEFLATED,
+                                         -self.zlib.MAX_WBITS,
+                                         self.zlib.DEF_MEM_LEVEL,
+                                         0)
         timestamp = struct.pack("<L", int(time.time()))
         self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
         if self.name.endswith(".gz"):
@@ -608,12 +609,12 @@ class _FileInFile(object):
        object.
     """
 
-    def __init__(self, fileobj, offset, size, blockinfo=None):
+    def __init__(self, fileobj, offset, size, name, blockinfo=None):
         self.fileobj = fileobj
         self.offset = offset
         self.size = size
         self.position = 0
-        self.name = getattr(fileobj, "name", None)
+        self.name = name
         self.closed = False
 
         if blockinfo is None:
@@ -710,7 +711,7 @@ class ExFileObject(io.BufferedReader):
 
     def __init__(self, tarfile, tarinfo):
         fileobj = _FileInFile(tarfile.fileobj, tarinfo.offset_data,
-                tarinfo.size, tarinfo.sparse)
+                tarinfo.size, tarinfo.name, tarinfo.sparse)
         super().__init__(fileobj)
 #class ExFileObject
 
@@ -1435,11 +1436,7 @@ class TarInfo(object):
         # the newline. keyword and value are both UTF-8 encoded strings.
         regex = re.compile(br"(\d+) ([^=]+)=")
         pos = 0
-        while True:
-            match = regex.match(buf, pos)
-            if not match:
-                break
-
+        while match := regex.match(buf, pos):
             length, keyword = match.groups()
             length = int(length)
             if length == 0:
@@ -1832,7 +1829,9 @@ class TarFile(object):
             if filemode not in ("r", "w"):
                 raise ValueError("mode must be 'r' or 'w'")
 
-            stream = _Stream(name, filemode, comptype, fileobj, bufsize)
+            compresslevel = kwargs.pop("compresslevel", 9)
+            stream = _Stream(name, filemode, comptype, fileobj, bufsize,
+                             compresslevel)
             try:
                 t = cls(name, filemode, stream, **kwargs)
             except:
@@ -2219,6 +2218,11 @@ class TarFile(object):
         if filter is None:
             filter = self.extraction_filter
             if filter is None:
+                warnings.warn(
+                    'Python 3.14 will, by default, filter extracted tar '
+                    + 'archives and reject files or modify their metadata. '
+                    + 'Use the filter argument to control this behavior.',
+                    DeprecationWarning)
                 return fully_trusted_filter
             if isinstance(filter, str):
                 raise TypeError(
@@ -2689,10 +2693,8 @@ class TarFile(object):
         """Read through the entire archive file and look for readable
            members.
         """
-        while True:
-            tarinfo = self.next()
-            if tarinfo is None:
-                break
+        while self.next() is not None:
+            pass
         self._loaded = True
 
     def _check(self, mode=None):
diff --git a/contrib/tools/python3/src/Lib/tempfile.py b/contrib/tools/python3/src/Lib/tempfile.py
index abb5f45103..cbfc172a78 100644
--- a/contrib/tools/python3/src/Lib/tempfile.py
+++ b/contrib/tools/python3/src/Lib/tempfile.py
@@ -41,7 +41,6 @@ import warnings as _warnings
 import io as _io
 import os as _os
 import shutil as _shutil
-import stat as _stat
 import errno as _errno
 from random import Random as _Random
 import sys as _sys
@@ -393,7 +392,7 @@ def mkdtemp(suffix=None, prefix=None, dir=None):
                 continue
             else:
                 raise
-        return file
+        return _os.path.abspath(file)
 
     raise FileExistsError(_errno.EEXIST,
                           "No usable temporary directory name found")
@@ -435,42 +434,42 @@ class _TemporaryFileCloser:
     underlying file object, without adding a __del__ method to the
     temporary file."""
 
-    file = None  # Set here since __del__ checks it
+    cleanup_called = False
     close_called = False
 
-    def __init__(self, file, name, delete=True):
+    def __init__(self, file, name, delete=True, delete_on_close=True):
         self.file = file
         self.name = name
         self.delete = delete
+        self.delete_on_close = delete_on_close
 
-    # NT provides delete-on-close as a primitive, so we don't need
-    # the wrapper to do anything special.  We still use it so that
-    # file.name is useful (i.e. not "(fdopen)") with NamedTemporaryFile.
-    if _os.name != 'nt':
-        # Cache the unlinker so we don't get spurious errors at
-        # shutdown when the module-level "os" is None'd out.  Note
-        # that this must be referenced as self.unlink, because the
-        # name TemporaryFileWrapper may also get None'd out before
-        # __del__ is called.
-
-        def close(self, unlink=_os.unlink):
-            if not self.close_called and self.file is not None:
-                self.close_called = True
-                try:
+    def cleanup(self, windows=(_os.name == 'nt'), unlink=_os.unlink):
+        if not self.cleanup_called:
+            self.cleanup_called = True
+            try:
+                if not self.close_called:
+                    self.close_called = True
                     self.file.close()
-                finally:
-                    if self.delete:
+            finally:
+                # Windows provides delete-on-close as a primitive, in which
+                # case the file was deleted by self.file.close().
+                if self.delete and not (windows and self.delete_on_close):
+                    try:
                         unlink(self.name)
+                    except FileNotFoundError:
+                        pass
 
-        # Need to ensure the file is deleted on __del__
-        def __del__(self):
-            self.close()
-
-    else:
-        def close(self):
-            if not self.close_called:
-                self.close_called = True
+    def close(self):
+        if not self.close_called:
+            self.close_called = True
+            try:
                 self.file.close()
+            finally:
+                if self.delete and self.delete_on_close:
+                    self.cleanup()
+
+    def __del__(self):
+        self.cleanup()
 
 
 class _TemporaryFileWrapper:
@@ -481,11 +480,11 @@ class _TemporaryFileWrapper:
     remove the file when it is no longer needed.
     """
 
-    def __init__(self, file, name, delete=True):
+    def __init__(self, file, name, delete=True, delete_on_close=True):
         self.file = file
         self.name = name
-        self.delete = delete
-        self._closer = _TemporaryFileCloser(file, name, delete)
+        self._closer = _TemporaryFileCloser(file, name, delete,
+                                            delete_on_close)
 
     def __getattr__(self, name):
         # Attribute lookups are delegated to the underlying file
@@ -516,7 +515,7 @@ class _TemporaryFileWrapper:
     # deleted when used in a with statement
     def __exit__(self, exc, value, tb):
         result = self.file.__exit__(exc, value, tb)
-        self.close()
+        self._closer.cleanup()
         return result
 
     def close(self):
@@ -535,10 +534,10 @@ class _TemporaryFileWrapper:
         for line in self.file:
             yield line
 
-
 def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,
                        newline=None, suffix=None, prefix=None,
-                       dir=None, delete=True, *, errors=None):
+                       dir=None, delete=True, *, errors=None,
+                       delete_on_close=True):
     """Create and return a temporary file.
     Arguments:
     'prefix', 'suffix', 'dir' -- as for mkstemp.
@@ -546,7 +545,10 @@ def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,
     'buffering' -- the buffer size argument to io.open (default -1).
     'encoding' -- the encoding argument to io.open (default None)
     'newline' -- the newline argument to io.open (default None)
-    'delete' -- whether the file is deleted on close (default True).
+    'delete' -- whether the file is automatically deleted (default True).
+    'delete_on_close' -- if 'delete', whether the file is deleted on close
+       (default True) or otherwise either on context manager exit
+       (if context manager was used) or on object finalization. .
     'errors' -- the errors argument to io.open (default None)
     The file is created as mkstemp() would do it.
 
@@ -565,7 +567,7 @@ def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,
 
     # Setting O_TEMPORARY in the flags causes the OS to delete
     # the file when it is closed.  This is only supported by Windows.
-    if _os.name == 'nt' and delete:
+    if _os.name == 'nt' and delete and delete_on_close:
         flags |= _os.O_TEMPORARY
 
     if "b" not in mode:
@@ -584,12 +586,13 @@ def NamedTemporaryFile(mode='w+b', buffering=-1, encoding=None,
             raw = getattr(file, 'buffer', file)
             raw = getattr(raw, 'raw', raw)
             raw.name = name
-            return _TemporaryFileWrapper(file, name, delete)
+            return _TemporaryFileWrapper(file, name, delete, delete_on_close)
         except:
             file.close()
             raise
     except:
-        if name is not None and not (_os.name == 'nt' and delete):
+        if name is not None and not (
+            _os.name == 'nt' and delete and delete_on_close):
             _os.unlink(name)
         raise
 
@@ -863,22 +866,31 @@ class TemporaryDirectory:
             ...
 
     Upon exiting the context, the directory and everything contained
-    in it are removed.
+    in it are removed (unless delete=False is passed or an exception
+    is raised during cleanup and ignore_cleanup_errors is not True).
+
+    Optional Arguments:
+        suffix - A str suffix for the directory name.  (see mkdtemp)
+        prefix - A str prefix for the directory name.  (see mkdtemp)
+        dir - A directory to create this temp dir in.  (see mkdtemp)
+        ignore_cleanup_errors - False; ignore exceptions during cleanup?
+        delete - True; whether the directory is automatically deleted.
     """
 
     def __init__(self, suffix=None, prefix=None, dir=None,
-                 ignore_cleanup_errors=False):
+                 ignore_cleanup_errors=False, *, delete=True):
         self.name = mkdtemp(suffix, prefix, dir)
         self._ignore_cleanup_errors = ignore_cleanup_errors
+        self._delete = delete
         self._finalizer = _weakref.finalize(
             self, self._cleanup, self.name,
             warn_message="Implicitly cleaning up {!r}".format(self),
-            ignore_errors=self._ignore_cleanup_errors)
+            ignore_errors=self._ignore_cleanup_errors, delete=self._delete)
 
     @classmethod
     def _rmtree(cls, name, ignore_errors=False, repeated=False):
-        def onerror(func, path, exc_info):
-            if issubclass(exc_info[0], PermissionError):
+        def onexc(func, path, exc):
+            if isinstance(exc, PermissionError):
                 if repeated and path == name:
                     if ignore_errors:
                         return
@@ -901,18 +913,7 @@ class TemporaryDirectory:
                         # raise NotADirectoryError and mask the PermissionError.
                         # So we must re-raise the current PermissionError if
                         # path is not a directory.
-                        try:
-                            st = _os.lstat(path)
-                        except OSError:
-                            if ignore_errors:
-                                return
-                            raise
-                        if (_stat.S_ISLNK(st.st_mode) or
-                            not _stat.S_ISDIR(st.st_mode) or
-                            (hasattr(st, 'st_file_attributes') and
-                             st.st_file_attributes & _stat.FILE_ATTRIBUTE_REPARSE_POINT and
-                             st.st_reparse_tag == _stat.IO_REPARSE_TAG_MOUNT_POINT)
-                        ):
+                        if not _os.path.isdir(path) or _os.path.isjunction(path):
                             if ignore_errors:
                                 return
                             raise
@@ -920,18 +921,19 @@ class TemporaryDirectory:
                                     repeated=(path == name))
                 except FileNotFoundError:
                     pass
-            elif issubclass(exc_info[0], FileNotFoundError):
+            elif isinstance(exc, FileNotFoundError):
                 pass
             else:
                 if not ignore_errors:
                     raise
 
-        _shutil.rmtree(name, onerror=onerror)
+        _shutil.rmtree(name, onexc=onexc)
 
     @classmethod
-    def _cleanup(cls, name, warn_message, ignore_errors=False):
-        cls._rmtree(name, ignore_errors=ignore_errors)
-        _warnings.warn(warn_message, ResourceWarning)
+    def _cleanup(cls, name, warn_message, ignore_errors=False, delete=True):
+        if delete:
+            cls._rmtree(name, ignore_errors=ignore_errors)
+            _warnings.warn(warn_message, ResourceWarning)
 
     def __repr__(self):
         return "<{} {!r}>".format(self.__class__.__name__, self.name)
@@ -940,7 +942,8 @@ class TemporaryDirectory:
         return self.name
 
     def __exit__(self, exc, value, tb):
-        self.cleanup()
+        if self._delete:
+            self.cleanup()
 
     def cleanup(self):
         if self._finalizer.detach() or _os.path.exists(self.name):
diff --git a/contrib/tools/python3/src/Lib/threading.py b/contrib/tools/python3/src/Lib/threading.py
index 9e7048ffdf..3936074d72 100644
--- a/contrib/tools/python3/src/Lib/threading.py
+++ b/contrib/tools/python3/src/Lib/threading.py
@@ -7,7 +7,7 @@ import functools
 
 from time import monotonic as _time
 from _weakrefset import WeakSet
-from itertools import islice as _islice, count as _count
+from itertools import count as _count
 try:
     from _collections import deque as _deque
 except ImportError:
@@ -28,14 +28,30 @@ __all__ = ['get_ident', 'active_count', 'Condition', 'current_thread',
            'Event', 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Thread',
            'Barrier', 'BrokenBarrierError', 'Timer', 'ThreadError',
            'setprofile', 'settrace', 'local', 'stack_size',
-           'excepthook', 'ExceptHookArgs', 'gettrace', 'getprofile']
+           'excepthook', 'ExceptHookArgs', 'gettrace', 'getprofile',
+           'setprofile_all_threads','settrace_all_threads']
 
 # Rename some stuff so "from threading import *" is safe
 _start_new_thread = _thread.start_new_thread
+_daemon_threads_allowed = _thread.daemon_threads_allowed
 _allocate_lock = _thread.allocate_lock
 _set_sentinel = _thread._set_sentinel
 get_ident = _thread.get_ident
 try:
+    _is_main_interpreter = _thread._is_main_interpreter
+except AttributeError:
+    # See https://github.com/python/cpython/issues/112826.
+    # We can pretend a subinterpreter is the main interpreter for the
+    # sake of _shutdown(), since that only means we do not wait for the
+    # subinterpreter's threads to finish.  Instead, they will be stopped
+    # later by the mechanism we use for daemon threads.  The likelihood
+    # of this case is small because rarely will the _thread module be
+    # replaced by a module without _is_main_interpreter().
+    # Furthermore, this is all irrelevant in applications
+    # that do not use subinterpreters.
+    def _is_main_interpreter():
+        return True
+try:
     get_native_id = _thread.get_native_id
     _HAVE_THREAD_NATIVE_ID = True
     __all__.append('get_native_id')
@@ -60,11 +76,20 @@ def setprofile(func):
 
     The func will be passed to sys.setprofile() for each thread, before its
     run() method is called.
-
     """
     global _profile_hook
     _profile_hook = func
 
+def setprofile_all_threads(func):
+    """Set a profile function for all threads started from the threading module
+    and all Python threads that are currently executing.
+
+    The func will be passed to sys.setprofile() for each thread, before its
+    run() method is called.
+    """
+    setprofile(func)
+    _sys._setprofileallthreads(func)
+
 def getprofile():
     """Get the profiler function as set by threading.setprofile()."""
     return _profile_hook
@@ -74,11 +99,20 @@ def settrace(func):
 
     The func will be passed to sys.settrace() for each thread, before its run()
     method is called.
-
     """
     global _trace_hook
     _trace_hook = func
 
+def settrace_all_threads(func):
+    """Set a trace function for all threads started from the threading module
+    and all Python threads that are currently executing.
+
+    The func will be passed to sys.settrace() for each thread, before its run()
+    method is called.
+    """
+    settrace(func)
+    _sys._settraceallthreads(func)
+
 def gettrace():
     """Get the trace function as set by threading.settrace()."""
     return _trace_hook
@@ -250,18 +284,12 @@ class Condition:
         # If the lock defines _release_save() and/or _acquire_restore(),
         # these override the default implementations (which just call
         # release() and acquire() on the lock).  Ditto for _is_owned().
-        try:
+        if hasattr(lock, '_release_save'):
             self._release_save = lock._release_save
-        except AttributeError:
-            pass
-        try:
+        if hasattr(lock, '_acquire_restore'):
             self._acquire_restore = lock._acquire_restore
-        except AttributeError:
-            pass
-        try:
+        if hasattr(lock, '_is_owned'):
             self._is_owned = lock._is_owned
-        except AttributeError:
-            pass
         self._waiters = _deque()
 
     def _at_fork_reinit(self):
@@ -495,8 +523,7 @@ class Semaphore:
             raise ValueError('n must be one or more')
         with self._cond:
             self._value += n
-            for i in range(n):
-                self._cond.notify()
+            self._cond.notify(n)
 
     def __exit__(self, t, v, tb):
         self.release()
@@ -520,7 +547,7 @@ class BoundedSemaphore(Semaphore):
     """
 
     def __init__(self, value=1):
-        Semaphore.__init__(self, value)
+        super().__init__(value)
         self._initial_value = value
 
     def __repr__(self):
@@ -544,8 +571,7 @@ class BoundedSemaphore(Semaphore):
             if self._value + n > self._initial_value:
                 raise ValueError("Semaphore released too many times")
             self._value += n
-            for i in range(n):
-                self._cond.notify()
+            self._cond.notify(n)
 
 
 class Event:
@@ -895,6 +921,8 @@ class Thread:
         self._args = args
         self._kwargs = kwargs
         if daemon is not None:
+            if daemon and not _daemon_threads_allowed():
+                raise RuntimeError('daemon threads are disabled in this (sub)interpreter')
             self._daemonic = daemon
         else:
             self._daemonic = current_thread().daemon
@@ -1222,6 +1250,8 @@ class Thread:
     def daemon(self, daemonic):
         if not self._initialized:
             raise RuntimeError("Thread.__init__() not called")
+        if daemonic and not _daemon_threads_allowed():
+            raise RuntimeError('daemon threads are disabled in this interpreter')
         if self._started.is_set():
             raise RuntimeError("cannot set daemon status of active thread")
         self._daemonic = daemonic
@@ -1428,8 +1458,8 @@ class _MainThread(Thread):
 class _DummyThread(Thread):
 
     def __init__(self):
-        Thread.__init__(self, name=_newname("Dummy-%d"), daemon=True)
-
+        Thread.__init__(self, name=_newname("Dummy-%d"),
+                        daemon=_daemon_threads_allowed())
         self._started.set()
         self._set_ident()
         if _HAVE_THREAD_NATIVE_ID:
@@ -1480,6 +1510,8 @@ def active_count():
     enumerate().
 
     """
+    # NOTE: if the logic in here ever changes, update Modules/posixmodule.c
+    # warn_about_fork_with_threads() to match.
     with _active_limbo_lock:
         return len(_active) + len(_limbo)
 
@@ -1547,7 +1579,7 @@ def _shutdown():
     # the main thread's tstate_lock - that won't happen until the interpreter
     # is nearly dead.  So we release it here.  Note that just calling _stop()
     # isn't enough:  other threads may already be waiting on _tstate_lock.
-    if _main_thread._is_stopped:
+    if _main_thread._is_stopped and _is_main_interpreter():
         # _shutdown() was already called
         return
 
@@ -1600,6 +1632,7 @@ def main_thread():
     In normal conditions, the main thread is the thread from which the
     Python interpreter was started.
     """
+    # XXX Figure this out for subinterpreters.  (See gh-75698.)
     return _main_thread
 
 # get thread-local implementation, either from the thread
diff --git a/contrib/tools/python3/src/Lib/timeit.py b/contrib/tools/python3/src/Lib/timeit.py
index 3250563f42..02cfafaf36 100755
--- a/contrib/tools/python3/src/Lib/timeit.py
+++ b/contrib/tools/python3/src/Lib/timeit.py
@@ -264,10 +264,9 @@ def main(args=None, *, _wrap_timer=None):
         args = sys.argv[1:]
     import getopt
     try:
-        opts, args = getopt.getopt(args, "n:u:s:r:tcpvh",
+        opts, args = getopt.getopt(args, "n:u:s:r:pvh",
                                    ["number=", "setup=", "repeat=",
-                                    "time", "clock", "process",
-                                    "verbose", "unit=", "help"])
+                                    "process", "verbose", "unit=", "help"])
     except getopt.error as err:
         print(err)
         print("use -h/--help for command line help")
diff --git a/contrib/tools/python3/src/Lib/token.py b/contrib/tools/python3/src/Lib/token.py
index 9d0c0bf0fb..487f6edd3c 100644
--- a/contrib/tools/python3/src/Lib/token.py
+++ b/contrib/tools/python3/src/Lib/token.py
@@ -1,5 +1,5 @@
 """Token constants."""
-# Auto-generated by Tools/scripts/generate_token.py
+# Auto-generated by Tools/build/generate_token.py
 
 __all__ = ['tok_name', 'ISTERMINAL', 'ISNONTERMINAL', 'ISEOF']
 
@@ -57,18 +57,22 @@ ATEQUAL = 50
 RARROW = 51
 ELLIPSIS = 52
 COLONEQUAL = 53
-OP = 54
-AWAIT = 55
-ASYNC = 56
-TYPE_IGNORE = 57
-TYPE_COMMENT = 58
-SOFT_KEYWORD = 59
+EXCLAMATION = 54
+OP = 55
+AWAIT = 56
+ASYNC = 57
+TYPE_IGNORE = 58
+TYPE_COMMENT = 59
+SOFT_KEYWORD = 60
+FSTRING_START = 61
+FSTRING_MIDDLE = 62
+FSTRING_END = 63
+COMMENT = 64
+NL = 65
 # These aren't used by the C tokenizer but are needed for tokenize.py
-ERRORTOKEN = 60
-COMMENT = 61
-NL = 62
-ENCODING = 63
-N_TOKENS = 64
+ERRORTOKEN = 66
+ENCODING = 67
+N_TOKENS = 68
 # Special definitions for cooperation with parser
 NT_OFFSET = 256
 
@@ -78,6 +82,7 @@ tok_name = {value: name
 __all__.extend(tok_name.values())
 
 EXACT_TOKEN_TYPES = {
+    '!': EXCLAMATION,
     '!=': NOTEQUAL,
     '%': PERCENT,
     '%=': PERCENTEQUAL,
diff --git a/contrib/tools/python3/src/Lib/tokenize.py b/contrib/tools/python3/src/Lib/tokenize.py
index 46d2224f5c..49e8144edd 100644
--- a/contrib/tools/python3/src/Lib/tokenize.py
+++ b/contrib/tools/python3/src/Lib/tokenize.py
@@ -34,6 +34,7 @@ import re
 import sys
 from token import *
 from token import EXACT_TOKEN_TYPES
+import _tokenize
 
 cookie_re = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)', re.ASCII)
 blank_re = re.compile(br'^[ \t\f]*(?:[#\r\n]|$)', re.ASCII)
@@ -160,8 +161,8 @@ tabsize = 8
 
 class TokenError(Exception): pass
 
-class StopTokenizing(Exception): pass
 
+class StopTokenizing(Exception): pass
 
 class Untokenizer:
 
@@ -213,6 +214,14 @@ class Untokenizer:
                     self.tokens.append(indent)
                     self.prev_col = len(indent)
                 startline = False
+            elif tok_type == FSTRING_MIDDLE:
+                if '{' in token or '}' in token:
+                    end_line, end_col = end
+                    end = (end_line, end_col + token.count('{') + token.count('}'))
+                    token = re.sub('{', '{{', token)
+                    token = re.sub('}', '}}', token)
+
+
             self.add_whitespace(start)
             self.tokens.append(token)
             self.prev_row, self.prev_col = end
@@ -255,6 +264,11 @@ class Untokenizer:
             elif startline and indents:
                 toks_append(indents[-1])
                 startline = False
+            elif toknum == FSTRING_MIDDLE:
+                if '{' in tokval or '}' in tokval:
+                    tokval = re.sub('{', '{{', tokval)
+                    tokval = re.sub('}', '}}', tokval)
+
             toks_append(tokval)
 
 
@@ -404,7 +418,6 @@ def open(filename):
         buffer.close()
         raise
 
-
 def tokenize(readline):
     """
     The tokenize() generator requires one argument, readline, which
@@ -425,193 +438,13 @@ def tokenize(readline):
     which tells you which encoding was used to decode the bytes stream.
     """
     encoding, consumed = detect_encoding(readline)
-    empty = _itertools.repeat(b"")
-    rl_gen = _itertools.chain(consumed, iter(readline, b""), empty)
-    return _tokenize(rl_gen.__next__, encoding)
-
-
-def _tokenize(readline, encoding):
-    lnum = parenlev = continued = 0
-    numchars = '0123456789'
-    contstr, needcont = '', 0
-    contline = None
-    indents = [0]
-
+    rl_gen = _itertools.chain(consumed, iter(readline, b""))
     if encoding is not None:
         if encoding == "utf-8-sig":
             # BOM will already have been stripped.
             encoding = "utf-8"
         yield TokenInfo(ENCODING, encoding, (0, 0), (0, 0), '')
-    last_line = b''
-    line = b''
-    while True:                                # loop over lines in stream
-        try:
-            # We capture the value of the line variable here because
-            # readline uses the empty string '' to signal end of input,
-            # hence `line` itself will always be overwritten at the end
-            # of this loop.
-            last_line = line
-            line = readline()
-        except StopIteration:
-            line = b''
-
-        if encoding is not None:
-            line = line.decode(encoding)
-        lnum += 1
-        pos, max = 0, len(line)
-
-        if contstr:                            # continued string
-            if not line:
-                raise TokenError("EOF in multi-line string", strstart)
-            endmatch = endprog.match(line)
-            if endmatch:
-                pos = end = endmatch.end(0)
-                yield TokenInfo(STRING, contstr + line[:end],
-                       strstart, (lnum, end), contline + line)
-                contstr, needcont = '', 0
-                contline = None
-            elif needcont and line[-2:] != '\\\n' and line[-3:] != '\\\r\n':
-                yield TokenInfo(ERRORTOKEN, contstr + line,
-                           strstart, (lnum, len(line)), contline)
-                contstr = ''
-                contline = None
-                continue
-            else:
-                contstr = contstr + line
-                contline = contline + line
-                continue
-
-        elif parenlev == 0 and not continued:  # new statement
-            if not line: break
-            column = 0
-            while pos < max:                   # measure leading whitespace
-                if line[pos] == ' ':
-                    column += 1
-                elif line[pos] == '\t':
-                    column = (column//tabsize + 1)*tabsize
-                elif line[pos] == '\f':
-                    column = 0
-                else:
-                    break
-                pos += 1
-            if pos == max:
-                break
-
-            if line[pos] in '#\r\n':           # skip comments or blank lines
-                if line[pos] == '#':
-                    comment_token = line[pos:].rstrip('\r\n')
-                    yield TokenInfo(COMMENT, comment_token,
-                           (lnum, pos), (lnum, pos + len(comment_token)), line)
-                    pos += len(comment_token)
-
-                yield TokenInfo(NL, line[pos:],
-                           (lnum, pos), (lnum, len(line)), line)
-                continue
-
-            if column > indents[-1]:           # count indents or dedents
-                indents.append(column)
-                yield TokenInfo(INDENT, line[:pos], (lnum, 0), (lnum, pos), line)
-            while column < indents[-1]:
-                if column not in indents:
-                    raise IndentationError(
-                        "unindent does not match any outer indentation level",
-                        ("<tokenize>", lnum, pos, line))
-                indents = indents[:-1]
-
-                yield TokenInfo(DEDENT, '', (lnum, pos), (lnum, pos), line)
-
-        else:                                  # continued statement
-            if not line:
-                raise TokenError("EOF in multi-line statement", (lnum, 0))
-            continued = 0
-
-        while pos < max:
-            pseudomatch = _compile(PseudoToken).match(line, pos)
-            if pseudomatch:                                # scan for tokens
-                start, end = pseudomatch.span(1)
-                spos, epos, pos = (lnum, start), (lnum, end), end
-                if start == end:
-                    continue
-                token, initial = line[start:end], line[start]
-
-                if (initial in numchars or                 # ordinary number
-                    (initial == '.' and token != '.' and token != '...')):
-                    yield TokenInfo(NUMBER, token, spos, epos, line)
-                elif initial in '\r\n':
-                    if parenlev > 0:
-                        yield TokenInfo(NL, token, spos, epos, line)
-                    else:
-                        yield TokenInfo(NEWLINE, token, spos, epos, line)
-
-                elif initial == '#':
-                    assert not token.endswith("\n")
-                    yield TokenInfo(COMMENT, token, spos, epos, line)
-
-                elif token in triple_quoted:
-                    endprog = _compile(endpats[token])
-                    endmatch = endprog.match(line, pos)
-                    if endmatch:                           # all on one line
-                        pos = endmatch.end(0)
-                        token = line[start:pos]
-                        yield TokenInfo(STRING, token, spos, (lnum, pos), line)
-                    else:
-                        strstart = (lnum, start)           # multiple lines
-                        contstr = line[start:]
-                        contline = line
-                        break
-
-                # Check up to the first 3 chars of the token to see if
-                #  they're in the single_quoted set. If so, they start
-                #  a string.
-                # We're using the first 3, because we're looking for
-                #  "rb'" (for example) at the start of the token. If
-                #  we switch to longer prefixes, this needs to be
-                #  adjusted.
-                # Note that initial == token[:1].
-                # Also note that single quote checking must come after
-                #  triple quote checking (above).
-                elif (initial in single_quoted or
-                      token[:2] in single_quoted or
-                      token[:3] in single_quoted):
-                    if token[-1] == '\n':                  # continued string
-                        strstart = (lnum, start)
-                        # Again, using the first 3 chars of the
-                        #  token. This is looking for the matching end
-                        #  regex for the correct type of quote
-                        #  character. So it's really looking for
-                        #  endpats["'"] or endpats['"'], by trying to
-                        #  skip string prefix characters, if any.
-                        endprog = _compile(endpats.get(initial) or
-                                           endpats.get(token[1]) or
-                                           endpats.get(token[2]))
-                        contstr, needcont = line[start:], 1
-                        contline = line
-                        break
-                    else:                                  # ordinary string
-                        yield TokenInfo(STRING, token, spos, epos, line)
-
-                elif initial.isidentifier():               # ordinary name
-                    yield TokenInfo(NAME, token, spos, epos, line)
-                elif initial == '\\':                      # continued stmt
-                    continued = 1
-                else:
-                    if initial in '([{':
-                        parenlev += 1
-                    elif initial in ')]}':
-                        parenlev -= 1
-                    yield TokenInfo(OP, token, spos, epos, line)
-            else:
-                yield TokenInfo(ERRORTOKEN, line[pos],
-                           (lnum, pos), (lnum, pos+1), line)
-                pos += 1
-
-    # Add an implicit NEWLINE if the input doesn't end in one
-    if last_line and last_line[-1] not in '\r\n' and not last_line.strip().startswith("#"):
-        yield TokenInfo(NEWLINE, '', (lnum - 1, len(last_line)), (lnum - 1, len(last_line) + 1), '')
-    for indent in indents[1:]:                 # pop remaining indent levels
-        yield TokenInfo(DEDENT, '', (lnum, 0), (lnum, 0), '')
-    yield TokenInfo(ENDMARKER, '', (lnum, 0), (lnum, 0), '')
-
+    yield from _generate_tokens_from_c_tokenizer(rl_gen.__next__, encoding, extra_tokens=True)
 
 def generate_tokens(readline):
     """Tokenize a source reading Python code as unicode strings.
@@ -619,7 +452,7 @@ def generate_tokens(readline):
     This has the same API as tokenize(), except that it expects the *readline*
     callable to return str objects instead of bytes.
     """
-    return _tokenize(readline, None)
+    return _generate_tokens_from_c_tokenizer(readline, extra_tokens=True)
 
 def main():
     import argparse
@@ -656,7 +489,9 @@ def main():
                 tokens = list(tokenize(f.readline))
         else:
             filename = "<stdin>"
-            tokens = _tokenize(sys.stdin.readline, None)
+            tokens = _generate_tokens_from_c_tokenizer(
+                sys.stdin.readline, extra_tokens=True)
+
 
         # Output the tokenization
         for token in tokens:
@@ -682,12 +517,30 @@ def main():
         perror("unexpected error: %s" % err)
         raise
 
-def _generate_tokens_from_c_tokenizer(source):
+def _transform_msg(msg):
+    """Transform error messages from the C tokenizer into the Python tokenize
+
+    The C tokenizer is more picky than the Python one, so we need to massage
+    the error messages a bit for backwards compatibility.
+    """
+    if "unterminated triple-quoted string literal" in msg:
+        return "EOF in multi-line string"
+    return msg
+
+def _generate_tokens_from_c_tokenizer(source, encoding=None, extra_tokens=False):
     """Tokenize a source reading Python code as unicode strings using the internal C tokenizer"""
-    import _tokenize as c_tokenizer
-    for info in c_tokenizer.TokenizerIter(source):
-        tok, type, lineno, end_lineno, col_off, end_col_off, line = info
-        yield TokenInfo(type, tok, (lineno, col_off), (end_lineno, end_col_off), line)
+    if encoding is None:
+        it = _tokenize.TokenizerIter(source, extra_tokens=extra_tokens)
+    else:
+        it = _tokenize.TokenizerIter(source, encoding=encoding, extra_tokens=extra_tokens)
+    try:
+        for info in it:
+            yield TokenInfo._make(info)
+    except SyntaxError as e:
+        if type(e) != SyntaxError:
+            raise e from None
+        msg = _transform_msg(e.msg)
+        raise TokenError(msg, (e.lineno, e.offset)) from None
 
 
 if __name__ == "__main__":
diff --git a/contrib/tools/python3/src/Lib/traceback.py b/contrib/tools/python3/src/Lib/traceback.py
index e7026e545c..8247d8ff8c 100644
--- a/contrib/tools/python3/src/Lib/traceback.py
+++ b/contrib/tools/python3/src/Lib/traceback.py
@@ -176,20 +176,24 @@ def _safe_string(value, what, func=str):
 # --
 
 def print_exc(limit=None, file=None, chain=True):
-    """Shorthand for 'print_exception(*sys.exc_info(), limit, file)'."""
-    print_exception(*sys.exc_info(), limit=limit, file=file, chain=chain)
+    """Shorthand for 'print_exception(sys.exception(), limit, file, chain)'."""
+    print_exception(sys.exception(), limit=limit, file=file, chain=chain)
 
 def format_exc(limit=None, chain=True):
     """Like print_exc() but return a string."""
-    return "".join(format_exception(*sys.exc_info(), limit=limit, chain=chain))
+    return "".join(format_exception(sys.exception(), limit=limit, chain=chain))
 
 def print_last(limit=None, file=None, chain=True):
-    """This is a shorthand for 'print_exception(sys.last_type,
-    sys.last_value, sys.last_traceback, limit, file)'."""
-    if not hasattr(sys, "last_type"):
+    """This is a shorthand for 'print_exception(sys.last_exc, limit, file, chain)'."""
+    if not hasattr(sys, "last_exc") and not hasattr(sys, "last_type"):
         raise ValueError("no last exception")
-    print_exception(sys.last_type, sys.last_value, sys.last_traceback,
-                    limit, file, chain)
+
+    if hasattr(sys, "last_exc"):
+        print_exception(sys.last_exc, limit, file, chain)
+    else:
+        print_exception(sys.last_type, sys.last_value, sys.last_traceback,
+                        limit, file, chain)
+
 
 #
 # Printing and Extracting Stacks.
@@ -276,7 +280,8 @@ class FrameSummary:
         self._line = line
         if lookup_line:
             self.line
-        self.locals = {k: repr(v) for k, v in locals.items()} if locals else None
+        self.locals = {k: _safe_string(v, 'local', func=repr)
+            for k, v in locals.items()} if locals else None
         self.end_lineno = end_lineno
         self.colno = colno
         self.end_colno = end_colno
@@ -737,7 +742,7 @@ class TracebackException:
             self.__notes__ = getattr(exc_value, '__notes__', None)
         except Exception as e:
             self.__notes__ = [
-                f'Ignored error getting __notes__: {_safe_string(e, "__notes__", repr)}']
+                f'Ignored error getting __notes__: {_safe_string(e, '__notes__', repr)}']
 
         if exc_type and issubclass(exc_type, SyntaxError):
             # Handle SyntaxError's specially
@@ -750,6 +755,25 @@ class TracebackException:
             self.offset = exc_value.offset
             self.end_offset = exc_value.end_offset
             self.msg = exc_value.msg
+        elif exc_type and issubclass(exc_type, ImportError) and \
+                getattr(exc_value, "name_from", None) is not None:
+            wrong_name = getattr(exc_value, "name_from", None)
+            suggestion = _compute_suggestion_error(exc_value, exc_traceback, wrong_name)
+            if suggestion:
+                self._str += f". Did you mean: '{suggestion}'?"
+        elif exc_type and issubclass(exc_type, (NameError, AttributeError)) and \
+                getattr(exc_value, "name", None) is not None:
+            wrong_name = getattr(exc_value, "name", None)
+            suggestion = _compute_suggestion_error(exc_value, exc_traceback, wrong_name)
+            if suggestion:
+                self._str += f". Did you mean: '{suggestion}'?"
+            if issubclass(exc_type, NameError):
+                wrong_name = getattr(exc_value, "name", None)
+                if wrong_name is not None and wrong_name in sys.stdlib_module_names:
+                    if suggestion:
+                        self._str += f" Or did you forget to import '{wrong_name}'"
+                    else:
+                        self._str += f". Did you forget to import '{wrong_name}'"
         if lookup_lines:
             self._load_lines()
         self.__suppress_context__ = \
@@ -870,12 +894,16 @@ class TracebackException:
             yield _format_final_exc_line(stype, self._str)
         else:
             yield from self._format_syntax_error(stype)
-        if isinstance(self.__notes__, collections.abc.Sequence):
+
+        if (
+            isinstance(self.__notes__, collections.abc.Sequence)
+            and not isinstance(self.__notes__, (str, bytes))
+        ):
             for note in self.__notes__:
                 note = _safe_string(note, 'note')
                 yield from [l + '\n' for l in note.split('\n')]
         elif self.__notes__ is not None:
-            yield _safe_string(self.__notes__, '__notes__', func=repr)
+            yield "{}\n".format(_safe_string(self.__notes__, '__notes__', func=repr))
 
     def _format_syntax_error(self, stype):
         """Format SyntaxError exceptions (internal helper)."""
@@ -1020,3 +1048,140 @@ class TracebackException:
             file = sys.stderr
         for line in self.format(chain=chain):
             print(line, file=file, end="")
+
+
+_MAX_CANDIDATE_ITEMS = 750
+_MAX_STRING_SIZE = 40
+_MOVE_COST = 2
+_CASE_COST = 1
+
+
+def _substitution_cost(ch_a, ch_b):
+    if ch_a == ch_b:
+        return 0
+    if ch_a.lower() == ch_b.lower():
+        return _CASE_COST
+    return _MOVE_COST
+
+
+def _compute_suggestion_error(exc_value, tb, wrong_name):
+    if wrong_name is None or not isinstance(wrong_name, str):
+        return None
+    if isinstance(exc_value, AttributeError):
+        obj = exc_value.obj
+        try:
+            d = dir(obj)
+        except Exception:
+            return None
+    elif isinstance(exc_value, ImportError):
+        try:
+            mod = __import__(exc_value.name)
+            d = dir(mod)
+        except Exception:
+            return None
+    else:
+        assert isinstance(exc_value, NameError)
+        # find most recent frame
+        if tb is None:
+            return None
+        while tb.tb_next is not None:
+            tb = tb.tb_next
+        frame = tb.tb_frame
+        d = (
+            list(frame.f_locals)
+            + list(frame.f_globals)
+            + list(frame.f_builtins)
+        )
+
+        # Check first if we are in a method and the instance
+        # has the wrong name as attribute
+        if 'self' in frame.f_locals:
+            self = frame.f_locals['self']
+            if hasattr(self, wrong_name):
+                return f"self.{wrong_name}"
+
+    # Compute closest match
+
+    if len(d) > _MAX_CANDIDATE_ITEMS:
+        return None
+    wrong_name_len = len(wrong_name)
+    if wrong_name_len > _MAX_STRING_SIZE:
+        return None
+    best_distance = wrong_name_len
+    suggestion = None
+    for possible_name in d:
+        if possible_name == wrong_name:
+            # A missing attribute is "found". Don't suggest it (see GH-88821).
+            continue
+        # No more than 1/3 of the involved characters should need changed.
+        max_distance = (len(possible_name) + wrong_name_len + 3) * _MOVE_COST // 6
+        # Don't take matches we've already beaten.
+        max_distance = min(max_distance, best_distance - 1)
+        current_distance = _levenshtein_distance(wrong_name, possible_name, max_distance)
+        if current_distance > max_distance:
+            continue
+        if not suggestion or current_distance < best_distance:
+            suggestion = possible_name
+            best_distance = current_distance
+    return suggestion
+
+
+def _levenshtein_distance(a, b, max_cost):
+    # A Python implementation of Python/suggestions.c:levenshtein_distance.
+
+    # Both strings are the same
+    if a == b:
+        return 0
+
+    # Trim away common affixes
+    pre = 0
+    while a[pre:] and b[pre:] and a[pre] == b[pre]:
+        pre += 1
+    a = a[pre:]
+    b = b[pre:]
+    post = 0
+    while a[:post or None] and b[:post or None] and a[post-1] == b[post-1]:
+        post -= 1
+    a = a[:post or None]
+    b = b[:post or None]
+    if not a or not b:
+        return _MOVE_COST * (len(a) + len(b))
+    if len(a) > _MAX_STRING_SIZE or len(b) > _MAX_STRING_SIZE:
+        return max_cost + 1
+
+    # Prefer shorter buffer
+    if len(b) < len(a):
+        a, b = b, a
+
+    # Quick fail when a match is impossible
+    if (len(b) - len(a)) * _MOVE_COST > max_cost:
+        return max_cost + 1
+
+    # Instead of producing the whole traditional len(a)-by-len(b)
+    # matrix, we can update just one row in place.
+    # Initialize the buffer row
+    row = list(range(_MOVE_COST, _MOVE_COST * (len(a) + 1), _MOVE_COST))
+
+    result = 0
+    for bindex in range(len(b)):
+        bchar = b[bindex]
+        distance = result = bindex * _MOVE_COST
+        minimum = sys.maxsize
+        for index in range(len(a)):
+            # 1) Previous distance in this row is cost(b[:b_index], a[:index])
+            substitute = distance + _substitution_cost(bchar, a[index])
+            # 2) cost(b[:b_index], a[:index+1]) from previous row
+            distance = row[index]
+            # 3) existing result is cost(b[:b_index+1], a[index])
+
+            insert_delete = min(result, distance) + _MOVE_COST
+            result = min(insert_delete, substitute)
+
+            # cost(b[:b_index+1], a[:index+1])
+            row[index] = result
+            if result < minimum:
+                minimum = result
+        if minimum > max_cost:
+            # Everything in this row is too big, so bail early.
+            return max_cost + 1
+    return result
diff --git a/contrib/tools/python3/src/Lib/tty.py b/contrib/tools/python3/src/Lib/tty.py
index a72eb67554..5a49e04004 100644
--- a/contrib/tools/python3/src/Lib/tty.py
+++ b/contrib/tools/python3/src/Lib/tty.py
@@ -4,9 +4,9 @@
 
 from termios import *
 
-__all__ = ["setraw", "setcbreak"]
+__all__ = ["cfmakeraw", "cfmakecbreak", "setraw", "setcbreak"]
 
-# Indexes for termios list.
+# Indices for termios list.
 IFLAG = 0
 OFLAG = 1
 CFLAG = 2
@@ -15,22 +15,59 @@ ISPEED = 4
 OSPEED = 5
 CC = 6
 
-def setraw(fd, when=TCSAFLUSH):
-    """Put terminal into a raw mode."""
-    mode = tcgetattr(fd)
-    mode[IFLAG] = mode[IFLAG] & ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON)
-    mode[OFLAG] = mode[OFLAG] & ~(OPOST)
-    mode[CFLAG] = mode[CFLAG] & ~(CSIZE | PARENB)
-    mode[CFLAG] = mode[CFLAG] | CS8
-    mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON | IEXTEN | ISIG)
+def cfmakeraw(mode):
+    """Make termios mode raw."""
+    # Clear all POSIX.1-2017 input mode flags.
+    # See chapter 11 "General Terminal Interface"
+    # of POSIX.1-2017 Base Definitions.
+    mode[IFLAG] &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
+                     INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF)
+
+    # Do not post-process output.
+    mode[OFLAG] &= ~OPOST
+
+    # Disable parity generation and detection; clear character size mask;
+    # let character size be 8 bits.
+    mode[CFLAG] &= ~(PARENB | CSIZE)
+    mode[CFLAG] |= CS8
+
+    # Clear all POSIX.1-2017 local mode flags.
+    mode[LFLAG] &= ~(ECHO | ECHOE | ECHOK | ECHONL | ICANON |
+                     IEXTEN | ISIG | NOFLSH | TOSTOP)
+
+    # POSIX.1-2017, 11.1.7 Non-Canonical Mode Input Processing,
+    # Case B: MIN>0, TIME=0
+    # A pending read shall block until MIN (here 1) bytes are received,
+    # or a signal is received.
+    mode[CC] = list(mode[CC])
     mode[CC][VMIN] = 1
     mode[CC][VTIME] = 0
-    tcsetattr(fd, when, mode)
 
-def setcbreak(fd, when=TCSAFLUSH):
-    """Put terminal into a cbreak mode."""
-    mode = tcgetattr(fd)
-    mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON)
+def cfmakecbreak(mode):
+    """Make termios mode cbreak."""
+    # Do not echo characters; disable canonical input.
+    mode[LFLAG] &= ~(ECHO | ICANON)
+
+    # POSIX.1-2017, 11.1.7 Non-Canonical Mode Input Processing,
+    # Case B: MIN>0, TIME=0
+    # A pending read shall block until MIN (here 1) bytes are received,
+    # or a signal is received.
+    mode[CC] = list(mode[CC])
     mode[CC][VMIN] = 1
     mode[CC][VTIME] = 0
-    tcsetattr(fd, when, mode)
+
+def setraw(fd, when=TCSAFLUSH):
+    """Put terminal into raw mode."""
+    mode = tcgetattr(fd)
+    new = list(mode)
+    cfmakeraw(new)
+    tcsetattr(fd, when, new)
+    return mode
+
+def setcbreak(fd, when=TCSAFLUSH):
+    """Put terminal into cbreak mode."""
+    mode = tcgetattr(fd)
+    new = list(mode)
+    cfmakecbreak(new)
+    tcsetattr(fd, when, new)
+    return mode
diff --git a/contrib/tools/python3/src/Lib/turtle.py b/contrib/tools/python3/src/Lib/turtle.py
index 1b369327bc..811c5dfa49 100644
--- a/contrib/tools/python3/src/Lib/turtle.py
+++ b/contrib/tools/python3/src/Lib/turtle.py
@@ -21,7 +21,6 @@
 #    misrepresented as being the original software.
 # 3. This notice may not be removed or altered from any source distribution.
 
-
 """
 Turtle graphics is a popular way for introducing programming to
 kids. It was part of the original Logo programming language developed
@@ -97,13 +96,8 @@ Roughly it has the following features added:
 
 Behind the scenes there are some features included with possible
 extensions in mind. These will be commented and documented elsewhere.
-
 """
 
-_ver = "turtle 1.1b- - for Python 3.1   -  4. 5. 2009"
-
-# print(_ver)
-
 import tkinter as TK
 import types
 import math
@@ -135,13 +129,13 @@ _tg_turtle_functions = ['back', 'backward', 'begin_fill', 'begin_poly', 'bk',
         'pu', 'radians', 'right', 'reset', 'resizemode', 'rt',
         'seth', 'setheading', 'setpos', 'setposition', 'settiltangle',
         'setundobuffer', 'setx', 'sety', 'shape', 'shapesize', 'shapetransform', 'shearfactor', 'showturtle',
-        'speed', 'st', 'stamp', 'tilt', 'tiltangle', 'towards',
+        'speed', 'st', 'stamp', 'teleport', 'tilt', 'tiltangle', 'towards',
         'turtlesize', 'undo', 'undobufferentries', 'up', 'width',
         'write', 'xcor', 'ycor']
 _tg_utilities = ['write_docstringdict', 'done']
 
 __all__ = (_tg_classes + _tg_screen_functions + _tg_turtle_functions +
-           _tg_utilities + ['Terminator']) # + _math_functions)
+           _tg_utilities + ['Terminator'])
 
 _alias_list = ['addshape', 'backward', 'bk', 'fd', 'ht', 'lt', 'pd', 'pos',
                'pu', 'rt', 'seth', 'setpos', 'setposition', 'st',
@@ -598,9 +592,6 @@ class TurtleScreenBase(object):
         x0, y0, x1, y1 = self.cv.bbox(item)
         return item, x1-1
 
-##    def _dot(self, pos, size, color):
-##        """may be implemented for some other graphics toolkit"""
-
     def _onclick(self, item, fun, num=1, add=None):
         """Bind fun to mouse-click event on turtle.
         fun must be a function with two arguments, the coordinates
@@ -1614,6 +1605,13 @@ class TNavigator(object):
         """move turtle to position end."""
         self._position = end
 
+    def teleport(self, x=None, y=None, *, fill_gap: bool = False) -> None:
+        """To be overwritten by child class RawTurtle.
+        Includes no TPen references."""
+        new_x = x if x is not None else self._position[0]
+        new_y = y if y is not None else self._position[1]
+        self._position = Vec2D(new_x, new_y)
+
     def forward(self, distance):
         """Move the turtle forward by the specified distance.
 
@@ -2293,6 +2291,15 @@ class TPen(object):
         else:
             return self._color(self._fillcolor)
 
+    def teleport(self, x=None, y=None, *, fill_gap: bool = False) -> None:
+        """To be overwritten by child class RawTurtle.
+        Includes no TNavigator references.
+        """
+        pendown = self.isdown()
+        if pendown:
+            self.pen(pendown=False)
+        self.pen(pendown=pendown)
+
     def showturtle(self):
         """Makes the turtle visible.
 
@@ -2711,6 +2718,54 @@ class RawTurtle(TPen, TNavigator):
             raise TurtleGraphicsError("bad color sequence: %s" % str(args))
         return "#%02x%02x%02x" % (r, g, b)
 
+    def teleport(self, x=None, y=None, *, fill_gap: bool = False) -> None:
+        """Instantly move turtle to an absolute position.
+
+        Arguments:
+        x -- a number      or     None
+        y -- a number             None
+        fill_gap -- a boolean     This argument must be specified by name.
+
+        call: teleport(x, y)         # two coordinates
+        --or: teleport(x)            # teleport to x position, keeping y as is
+        --or: teleport(y=y)          # teleport to y position, keeping x as is
+        --or: teleport(x, y, fill_gap=True)
+                                     # teleport but fill the gap in between
+
+        Move turtle to an absolute position. Unlike goto(x, y), a line will not
+        be drawn. The turtle's orientation does not change. If currently
+        filling, the polygon(s) teleported from will be filled after leaving,
+        and filling will begin again after teleporting. This can be disabled
+        with fill_gap=True, which makes the imaginary line traveled during
+        teleporting act as a fill barrier like in goto(x, y).
+
+        Example (for a Turtle instance named turtle):
+        >>> tp = turtle.pos()
+        >>> tp
+        (0.00,0.00)
+        >>> turtle.teleport(60)
+        >>> turtle.pos()
+        (60.00,0.00)
+        >>> turtle.teleport(y=10)
+        >>> turtle.pos()
+        (60.00,10.00)
+        >>> turtle.teleport(20, 30)
+        >>> turtle.pos()
+        (20.00,30.00)
+        """
+        pendown = self.isdown()
+        was_filling = self.filling()
+        if pendown:
+            self.pen(pendown=False)
+        if was_filling and not fill_gap:
+            self.end_fill()
+        new_x = x if x is not None else self._position[0]
+        new_y = y if y is not None else self._position[1]
+        self._position = Vec2D(new_x, new_y)
+        self.pen(pendown=pendown)
+        if was_filling and not fill_gap:
+            self.begin_fill()
+
     def clone(self):
         """Create and return a clone of the turtle.
 
@@ -3391,27 +3446,22 @@ class RawTurtle(TPen, TNavigator):
             if size is None:
                 size = self._pensize + max(self._pensize, 4)
             color = self._colorstr(color)
-        if hasattr(self.screen, "_dot"):
-            item = self.screen._dot(self._position, size, color)
-            self.items.append(item)
-            if self.undobuffer:
-                self.undobuffer.push(("dot", item))
-        else:
-            pen = self.pen()
-            if self.undobuffer:
-                self.undobuffer.push(["seq"])
-                self.undobuffer.cumulate = True
-            try:
-                if self.resizemode() == 'auto':
-                    self.ht()
-                self.pendown()
-                self.pensize(size)
-                self.pencolor(color)
-                self.forward(0)
-            finally:
-                self.pen(pen)
-            if self.undobuffer:
-                self.undobuffer.cumulate = False
+        # If screen were to gain a dot function, see GH #104218.
+        pen = self.pen()
+        if self.undobuffer:
+            self.undobuffer.push(["seq"])
+            self.undobuffer.cumulate = True
+        try:
+            if self.resizemode() == 'auto':
+                self.ht()
+            self.pendown()
+            self.pensize(size)
+            self.pencolor(color)
+            self.forward(0)
+        finally:
+            self.pen(pen)
+        if self.undobuffer:
+            self.undobuffer.cumulate = False
 
     def _write(self, txt, align, font):
         """Performs the writing for write()
@@ -3687,11 +3737,6 @@ class _Screen(TurtleScreen):
     _title = _CFG["title"]
 
     def __init__(self):
-        # XXX there is no need for this code to be conditional,
-        # as there will be only a single _Screen instance, anyway
-        # XXX actually, the turtle demo is injecting root window,
-        # so perhaps the conditional creation of a root should be
-        # preserved (perhaps by passing it as an optional parameter)
         if _Screen._root is None:
             _Screen._root = self._root = _Root()
             self._root.title(_Screen._title)
@@ -3906,28 +3951,33 @@ def getmethparlist(ob):
     function definition and the second is suitable for use in function
     call.  The "self" parameter is not included.
     """
-    defText = callText = ""
+    orig_sig = inspect.signature(ob)
     # bit of a hack for methods - turn it into a function
     # but we drop the "self" param.
     # Try and build one for Python defined functions
-    args, varargs, varkw = inspect.getargs(ob.__code__)
-    items2 = args[1:]
-    realArgs = args[1:]
-    defaults = ob.__defaults__ or []
-    defaults = ["=%r" % (value,) for value in defaults]
-    defaults = [""] * (len(realArgs)-len(defaults)) + defaults
-    items1 = [arg + dflt for arg, dflt in zip(realArgs, defaults)]
-    if varargs is not None:
-        items1.append("*" + varargs)
-        items2.append("*" + varargs)
-    if varkw is not None:
-        items1.append("**" + varkw)
-        items2.append("**" + varkw)
-    defText = ", ".join(items1)
-    defText = "(%s)" % defText
-    callText = ", ".join(items2)
-    callText = "(%s)" % callText
-    return defText, callText
+    func_sig = orig_sig.replace(
+        parameters=list(orig_sig.parameters.values())[1:],
+    )
+
+    call_args = []
+    for param in func_sig.parameters.values():
+        match param.kind:
+            case (
+                inspect.Parameter.POSITIONAL_ONLY
+                | inspect.Parameter.POSITIONAL_OR_KEYWORD
+            ):
+                call_args.append(param.name)
+            case inspect.Parameter.VAR_POSITIONAL:
+                call_args.append(f'*{param.name}')
+            case inspect.Parameter.KEYWORD_ONLY:
+                call_args.append(f'{param.name}={param.name}')
+            case inspect.Parameter.VAR_KEYWORD:
+                call_args.append(f'**{param.name}')
+            case _:
+                raise RuntimeError('Unsupported parameter kind', param.kind)
+    call_text = f'({', '.join(call_args)})'
+
+    return str(func_sig), call_text
 
 def _turtle_docrevise(docstr):
     """To reduce docstrings from RawTurtle class for functions
diff --git a/contrib/tools/python3/src/Lib/types.py b/contrib/tools/python3/src/Lib/types.py
index 2e73fbc450..b4aa19cec4 100644
--- a/contrib/tools/python3/src/Lib/types.py
+++ b/contrib/tools/python3/src/Lib/types.py
@@ -56,11 +56,10 @@ except TypeError as exc:
     TracebackType = type(exc.__traceback__)
     FrameType = type(exc.__traceback__.tb_frame)
 
-# For Jython, the following two types are identical
 GetSetDescriptorType = type(FunctionType.__code__)
 MemberDescriptorType = type(FunctionType.__globals__)
 
-del sys, _f, _g, _C, _c, _ag  # Not for export
+del sys, _f, _g, _C, _c, _ag, _cell_factory  # Not for export
 
 
 # Provide a PEP 3115 compliant mechanism for class creation
@@ -144,6 +143,35 @@ def _calculate_meta(meta, bases):
                         "of the metaclasses of all its bases")
     return winner
 
+
+def get_original_bases(cls, /):
+    """Return the class's "original" bases prior to modification by `__mro_entries__`.
+
+    Examples::
+
+        from typing import TypeVar, Generic, NamedTuple, TypedDict
+
+        T = TypeVar("T")
+        class Foo(Generic[T]): ...
+        class Bar(Foo[int], float): ...
+        class Baz(list[str]): ...
+        Eggs = NamedTuple("Eggs", [("a", int), ("b", str)])
+        Spam = TypedDict("Spam", {"a": int, "b": str})
+
+        assert get_original_bases(Bar) == (Foo[int], float)
+        assert get_original_bases(Baz) == (list[str],)
+        assert get_original_bases(Eggs) == (NamedTuple,)
+        assert get_original_bases(Spam) == (TypedDict,)
+        assert get_original_bases(int) == (object,)
+    """
+    try:
+        return cls.__dict__.get("__orig_bases__", cls.__bases__)
+    except AttributeError:
+        raise TypeError(
+            f"Expected an instance of type, not {type(cls).__name__!r}"
+        ) from None
+
+
 class DynamicClassAttribute:
     """Route attribute access on a class to __getattr__.
 
diff --git a/contrib/tools/python3/src/Lib/typing.py b/contrib/tools/python3/src/Lib/typing.py
index 5289818950..ffe7ce8d8a 100644
--- a/contrib/tools/python3/src/Lib/typing.py
+++ b/contrib/tools/python3/src/Lib/typing.py
@@ -23,6 +23,7 @@ from abc import abstractmethod, ABCMeta
 import collections
 from collections import defaultdict
 import collections.abc
+import copyreg
 import contextlib
 import functools
 import operator
@@ -32,12 +33,16 @@ import types
 import warnings
 from types import WrapperDescriptorType, MethodWrapperType, MethodDescriptorType, GenericAlias
 
-
-try:
-    from _typing import _idfunc
-except ImportError:
-    def _idfunc(_, x):
-        return x
+from _typing import (
+    _idfunc,
+    TypeVar,
+    ParamSpec,
+    TypeVarTuple,
+    ParamSpecArgs,
+    ParamSpecKwargs,
+    TypeAliasType,
+    Generic,
+)
 
 # Please keep __all__ alphabetized within each category.
 __all__ = [
@@ -138,6 +143,7 @@ __all__ = [
     'NoReturn',
     'NotRequired',
     'overload',
+    'override',
     'ParamSpecArgs',
     'ParamSpecKwargs',
     'Required',
@@ -148,6 +154,7 @@ __all__ = [
     'TYPE_CHECKING',
     'TypeAlias',
     'TypeGuard',
+    'TypeAliasType',
     'Unpack',
 ]
 
@@ -235,16 +242,20 @@ def _type_repr(obj):
     typically enough to uniquely identify a type.  For everything
     else, we fall back on repr(obj).
     """
-    if isinstance(obj, types.GenericAlias):
-        return repr(obj)
+    # When changing this function, don't forget about
+    # `_collections_abc._type_repr`, which does the same thing
+    # and must be consistent with this one.
     if isinstance(obj, type):
         if obj.__module__ == 'builtins':
             return obj.__qualname__
         return f'{obj.__module__}.{obj.__qualname__}'
     if obj is ...:
-        return('...')
+        return '...'
     if isinstance(obj, types.FunctionType):
         return obj.__name__
+    if isinstance(obj, tuple):
+        # Special case for `repr` of types with `ParamSpec`:
+        return '[' + ', '.join(_type_repr(t) for t in obj) + ']'
     return repr(obj)
 
 
@@ -345,6 +356,7 @@ def _flatten_literal_params(parameters):
 
 
 _cleanups = []
+_caches = {}
 
 
 def _tp_cache(func=None, /, *, typed=False):
@@ -353,13 +365,20 @@ def _tp_cache(func=None, /, *, typed=False):
     For non-hashable arguments, the original function is used as a fallback.
     """
     def decorator(func):
-        cached = functools.lru_cache(typed=typed)(func)
-        _cleanups.append(cached.cache_clear)
+        # The callback 'inner' references the newly created lru_cache
+        # indirectly by performing a lookup in the global '_caches' dictionary.
+        # This breaks a reference that can be problematic when combined with
+        # C API extensions that leak references to types. See GH-98253.
+
+        cache = functools.lru_cache(typed=typed)(func)
+        _caches[func] = cache
+        _cleanups.append(cache.cache_clear)
+        del cache
 
         @functools.wraps(func)
         def inner(*args, **kwds):
             try:
-                return cached(*args, **kwds)
+                return _caches[func](*args, **kwds)
             except TypeError:
                 pass  # All real errors (not unhashable args) are raised below.
             return func(*args, **kwds)
@@ -413,17 +432,6 @@ class _Final:
         if '_root' not in kwds:
             raise TypeError("Cannot subclass special typing classes")
 
-class _Immutable:
-    """Mixin to indicate that object should not be copied."""
-
-    __slots__ = ()
-
-    def __copy__(self):
-        return self
-
-    def __deepcopy__(self, memo):
-        return self
-
 
 class _NotIterable:
     """Mixin to prevent iteration, without being compatible with Iterable.
@@ -706,6 +714,15 @@ def Union(self, parameters):
         return _UnionGenericAlias(self, parameters, name="Optional")
     return _UnionGenericAlias(self, parameters)
 
+def _make_union(left, right):
+    """Used from the C implementation of TypeVar.
+
+    TypeVar.__or__ calls this instead of returning types.UnionType
+    because we want to allow unions between TypeVars and strings
+    (forward references).
+    """
+    return Union[left, right]
+
 @_SpecialForm
 def Optional(self, parameters):
     """Optional[X] is equivalent to Union[X, None]."""
@@ -787,8 +804,7 @@ def Concatenate(self, parameters):
                         "ParamSpec variable or ellipsis.")
     msg = "Concatenate[arg, ...]: each arg must be a type."
     parameters = (*(_type_check(p, msg) for p in parameters[:-1]), parameters[-1])
-    return _ConcatenateGenericAlias(self, parameters,
-                                    _paramspec_tvars=True)
+    return _ConcatenateGenericAlias(self, parameters)
 
 
 @_SpecialForm
@@ -941,313 +957,162 @@ class _PickleUsingNameMixin:
         return self.__name__
 
 
-class _BoundVarianceMixin:
-    """Mixin giving __init__ bound and variance arguments.
-
-    This is used by TypeVar and ParamSpec, which both employ the notions of
-    a type 'bound' (restricting type arguments to be a subtype of some
-    specified type) and type 'variance' (determining subtype relations between
-    generic types).
-    """
-    def __init__(self, bound, covariant, contravariant):
-        """Used to setup TypeVars and ParamSpec's bound, covariant and
-        contravariant attributes.
-        """
-        if covariant and contravariant:
-            raise ValueError("Bivariant types are not supported.")
-        self.__covariant__ = bool(covariant)
-        self.__contravariant__ = bool(contravariant)
-        if bound:
-            self.__bound__ = _type_check(bound, "Bound must be a type.")
-        else:
-            self.__bound__ = None
-
-    def __or__(self, right):
-        return Union[self, right]
-
-    def __ror__(self, left):
-        return Union[left, self]
-
-    def __repr__(self):
-        if self.__covariant__:
-            prefix = '+'
-        elif self.__contravariant__:
-            prefix = '-'
-        else:
-            prefix = '~'
-        return prefix + self.__name__
-
-
-class TypeVar(_Final, _Immutable, _BoundVarianceMixin, _PickleUsingNameMixin,
-              _root=True):
-    """Type variable.
-
-    Usage::
-
-      T = TypeVar('T')  # Can be anything
-      A = TypeVar('A', str, bytes)  # Must be str or bytes
-
-    Type variables exist primarily for the benefit of static type
-    checkers.  They serve as the parameters for generic types as well
-    as for generic function definitions.  See class Generic for more
-    information on generic types.  Generic functions work as follows:
-
-      def repeat(x: T, n: int) -> List[T]:
-          '''Return a list containing n references to x.'''
-          return [x]*n
-
-      def longest(x: A, y: A) -> A:
-          '''Return the longest of two strings.'''
-          return x if len(x) >= len(y) else y
-
-    The latter example's signature is essentially the overloading
-    of (str, str) -> str and (bytes, bytes) -> bytes.  Also note
-    that if the arguments are instances of some subclass of str,
-    the return type is still plain str.
-
-    At runtime, isinstance(x, T) and issubclass(C, T) will raise TypeError.
-
-    Type variables defined with covariant=True or contravariant=True
-    can be used to declare covariant or contravariant generic types.
-    See PEP 484 for more details. By default generic types are invariant
-    in all type variables.
-
-    Type variables can be introspected. e.g.:
-
-      T.__name__ == 'T'
-      T.__constraints__ == ()
-      T.__covariant__ == False
-      T.__contravariant__ = False
-      A.__constraints__ == (str, bytes)
-
-    Note that only type variables defined in global scope can be pickled.
-    """
-
-    def __init__(self, name, *constraints, bound=None,
-                 covariant=False, contravariant=False):
-        self.__name__ = name
-        super().__init__(bound, covariant, contravariant)
-        if constraints and bound is not None:
-            raise TypeError("Constraints cannot be combined with bound=...")
-        if constraints and len(constraints) == 1:
-            raise TypeError("A single constraint is not allowed")
-        msg = "TypeVar(name, constraint, ...): constraints must be types."
-        self.__constraints__ = tuple(_type_check(t, msg) for t in constraints)
-        def_mod = _caller()
-        if def_mod != 'typing':
-            self.__module__ = def_mod
+def _typevar_subst(self, arg):
+    msg = "Parameters to generic types must be types."
+    arg = _type_check(arg, msg, is_argument=True)
+    if ((isinstance(arg, _GenericAlias) and arg.__origin__ is Unpack) or
+        (isinstance(arg, GenericAlias) and getattr(arg, '__unpacked__', False))):
+        raise TypeError(f"{arg} is not valid as type argument")
+    return arg
 
-    def __typing_subst__(self, arg):
-        msg = "Parameters to generic types must be types."
-        arg = _type_check(arg, msg, is_argument=True)
-        if ((isinstance(arg, _GenericAlias) and arg.__origin__ is Unpack) or
-            (isinstance(arg, GenericAlias) and getattr(arg, '__unpacked__', False))):
-            raise TypeError(f"{arg} is not valid as type argument")
-        return arg
 
+def _typevartuple_prepare_subst(self, alias, args):
+    params = alias.__parameters__
+    typevartuple_index = params.index(self)
+    for param in params[typevartuple_index + 1:]:
+        if isinstance(param, TypeVarTuple):
+            raise TypeError(f"More than one TypeVarTuple parameter in {alias}")
+
+    alen = len(args)
+    plen = len(params)
+    left = typevartuple_index
+    right = plen - typevartuple_index - 1
+    var_tuple_index = None
+    fillarg = None
+    for k, arg in enumerate(args):
+        if not isinstance(arg, type):
+            subargs = getattr(arg, '__typing_unpacked_tuple_args__', None)
+            if subargs and len(subargs) == 2 and subargs[-1] is ...:
+                if var_tuple_index is not None:
+                    raise TypeError("More than one unpacked arbitrary-length tuple argument")
+                var_tuple_index = k
+                fillarg = subargs[0]
+    if var_tuple_index is not None:
+        left = min(left, var_tuple_index)
+        right = min(right, alen - var_tuple_index - 1)
+    elif left + right > alen:
+        raise TypeError(f"Too few arguments for {alias};"
+                        f" actual {alen}, expected at least {plen-1}")
 
-class TypeVarTuple(_Final, _Immutable, _PickleUsingNameMixin, _root=True):
-    """Type variable tuple.
+    return (
+        *args[:left],
+        *([fillarg]*(typevartuple_index - left)),
+        tuple(args[left: alen - right]),
+        *([fillarg]*(plen - right - left - typevartuple_index - 1)),
+        *args[alen - right:],
+    )
 
-    Usage:
 
-      Ts = TypeVarTuple('Ts')  # Can be given any name
+def _paramspec_subst(self, arg):
+    if isinstance(arg, (list, tuple)):
+        arg = tuple(_type_check(a, "Expected a type.") for a in arg)
+    elif not _is_param_expr(arg):
+        raise TypeError(f"Expected a list of types, an ellipsis, "
+                        f"ParamSpec, or Concatenate. Got {arg}")
+    return arg
 
-    Just as a TypeVar (type variable) is a placeholder for a single type,
-    a TypeVarTuple is a placeholder for an *arbitrary* number of types. For
-    example, if we define a generic class using a TypeVarTuple:
 
-      class C(Generic[*Ts]): ...
+def _paramspec_prepare_subst(self, alias, args):
+    params = alias.__parameters__
+    i = params.index(self)
+    if i >= len(args):
+        raise TypeError(f"Too few arguments for {alias}")
+    # Special case where Z[[int, str, bool]] == Z[int, str, bool] in PEP 612.
+    if len(params) == 1 and not _is_param_expr(args[0]):
+        assert i == 0
+        args = (args,)
+    # Convert lists to tuples to help other libraries cache the results.
+    elif isinstance(args[i], list):
+        args = (*args[:i], tuple(args[i]), *args[i+1:])
+    return args
 
-    Then we can parameterize that class with an arbitrary number of type
-    arguments:
 
-      C[int]       # Fine
-      C[int, str]  # Also fine
-      C[()]        # Even this is fine
+@_tp_cache
+def _generic_class_getitem(cls, params):
+    """Parameterizes a generic class.
 
-    For more details, see PEP 646.
+    At least, parameterizing a generic class is the *main* thing this method
+    does. For example, for some generic class `Foo`, this is called when we
+    do `Foo[int]` - there, with `cls=Foo` and `params=int`.
 
-    Note that only TypeVarTuples defined in global scope can be pickled.
+    However, note that this method is also called when defining generic
+    classes in the first place with `class Foo(Generic[T]): ...`.
     """
+    if not isinstance(params, tuple):
+        params = (params,)
 
-    def __init__(self, name):
-        self.__name__ = name
-
-        # Used for pickling.
-        def_mod = _caller()
-        if def_mod != 'typing':
-            self.__module__ = def_mod
-
-    def __iter__(self):
-        yield Unpack[self]
-
-    def __repr__(self):
-        return self.__name__
+    params = tuple(_type_convert(p) for p in params)
+    is_generic_or_protocol = cls in (Generic, Protocol)
 
-    def __typing_subst__(self, arg):
-        raise TypeError("Substitution of bare TypeVarTuple is not supported")
+    if is_generic_or_protocol:
+        # Generic and Protocol can only be subscripted with unique type variables.
+        if not params:
+            raise TypeError(
+                f"Parameter list to {cls.__qualname__}[...] cannot be empty"
+            )
+        if not all(_is_typevar_like(p) for p in params):
+            raise TypeError(
+                f"Parameters to {cls.__name__}[...] must all be type variables "
+                f"or parameter specification variables.")
+        if len(set(params)) != len(params):
+            raise TypeError(
+                f"Parameters to {cls.__name__}[...] must all be unique")
+    else:
+        # Subscripting a regular Generic subclass.
+        for param in cls.__parameters__:
+            prepare = getattr(param, '__typing_prepare_subst__', None)
+            if prepare is not None:
+                params = prepare(cls, params)
+        _check_generic(cls, params, len(cls.__parameters__))
 
-    def __typing_prepare_subst__(self, alias, args):
-        params = alias.__parameters__
-        typevartuple_index = params.index(self)
-        for param in params[typevartuple_index + 1:]:
+        new_args = []
+        for param, new_arg in zip(cls.__parameters__, params):
             if isinstance(param, TypeVarTuple):
-                raise TypeError(f"More than one TypeVarTuple parameter in {alias}")
-
-        alen = len(args)
-        plen = len(params)
-        left = typevartuple_index
-        right = plen - typevartuple_index - 1
-        var_tuple_index = None
-        fillarg = None
-        for k, arg in enumerate(args):
-            if not isinstance(arg, type):
-                subargs = getattr(arg, '__typing_unpacked_tuple_args__', None)
-                if subargs and len(subargs) == 2 and subargs[-1] is ...:
-                    if var_tuple_index is not None:
-                        raise TypeError("More than one unpacked arbitrary-length tuple argument")
-                    var_tuple_index = k
-                    fillarg = subargs[0]
-        if var_tuple_index is not None:
-            left = min(left, var_tuple_index)
-            right = min(right, alen - var_tuple_index - 1)
-        elif left + right > alen:
-            raise TypeError(f"Too few arguments for {alias};"
-                            f" actual {alen}, expected at least {plen-1}")
-
-        return (
-            *args[:left],
-            *([fillarg]*(typevartuple_index - left)),
-            tuple(args[left: alen - right]),
-            *([fillarg]*(plen - right - left - typevartuple_index - 1)),
-            *args[alen - right:],
-        )
-
-
-class ParamSpecArgs(_Final, _Immutable, _root=True):
-    """The args for a ParamSpec object.
-
-    Given a ParamSpec object P, P.args is an instance of ParamSpecArgs.
-
-    ParamSpecArgs objects have a reference back to their ParamSpec:
-
-       P.args.__origin__ is P
-
-    This type is meant for runtime introspection and has no special meaning to
-    static type checkers.
-    """
-    def __init__(self, origin):
-        self.__origin__ = origin
-
-    def __repr__(self):
-        return f"{self.__origin__.__name__}.args"
-
-    def __eq__(self, other):
-        if not isinstance(other, ParamSpecArgs):
-            return NotImplemented
-        return self.__origin__ == other.__origin__
-
-
-class ParamSpecKwargs(_Final, _Immutable, _root=True):
-    """The kwargs for a ParamSpec object.
-
-    Given a ParamSpec object P, P.kwargs is an instance of ParamSpecKwargs.
-
-    ParamSpecKwargs objects have a reference back to their ParamSpec:
-
-       P.kwargs.__origin__ is P
-
-    This type is meant for runtime introspection and has no special meaning to
-    static type checkers.
-    """
-    def __init__(self, origin):
-        self.__origin__ = origin
-
-    def __repr__(self):
-        return f"{self.__origin__.__name__}.kwargs"
-
-    def __eq__(self, other):
-        if not isinstance(other, ParamSpecKwargs):
-            return NotImplemented
-        return self.__origin__ == other.__origin__
-
-
-class ParamSpec(_Final, _Immutable, _BoundVarianceMixin, _PickleUsingNameMixin,
-                _root=True):
-    """Parameter specification variable.
-
-    Usage::
-
-       P = ParamSpec('P')
-
-    Parameter specification variables exist primarily for the benefit of static
-    type checkers.  They are used to forward the parameter types of one
-    callable to another callable, a pattern commonly found in higher order
-    functions and decorators.  They are only valid when used in ``Concatenate``,
-    or as the first argument to ``Callable``, or as parameters for user-defined
-    Generics.  See class Generic for more information on generic types.  An
-    example for annotating a decorator::
-
-       T = TypeVar('T')
-       P = ParamSpec('P')
-
-       def add_logging(f: Callable[P, T]) -> Callable[P, T]:
-           '''A type-safe decorator to add logging to a function.'''
-           def inner(*args: P.args, **kwargs: P.kwargs) -> T:
-               logging.info(f'{f.__name__} was called')
-               return f(*args, **kwargs)
-           return inner
-
-       @add_logging
-       def add_two(x: float, y: float) -> float:
-           '''Add two numbers together.'''
-           return x + y
-
-    Parameter specification variables can be introspected. e.g.:
-
-       P.__name__ == 'P'
-
-    Note that only parameter specification variables defined in global scope can
-    be pickled.
-    """
-
-    @property
-    def args(self):
-        return ParamSpecArgs(self)
+                new_args.extend(new_arg)
+            else:
+                new_args.append(new_arg)
+        params = tuple(new_args)
 
-    @property
-    def kwargs(self):
-        return ParamSpecKwargs(self)
+    return _GenericAlias(cls, params)
 
-    def __init__(self, name, *, bound=None, covariant=False, contravariant=False):
-        self.__name__ = name
-        super().__init__(bound, covariant, contravariant)
-        def_mod = _caller()
-        if def_mod != 'typing':
-            self.__module__ = def_mod
 
-    def __typing_subst__(self, arg):
-        if isinstance(arg, (list, tuple)):
-            arg = tuple(_type_check(a, "Expected a type.") for a in arg)
-        elif not _is_param_expr(arg):
-            raise TypeError(f"Expected a list of types, an ellipsis, "
-                            f"ParamSpec, or Concatenate. Got {arg}")
-        return arg
+def _generic_init_subclass(cls, *args, **kwargs):
+    super(Generic, cls).__init_subclass__(*args, **kwargs)
+    tvars = []
+    if '__orig_bases__' in cls.__dict__:
+        error = Generic in cls.__orig_bases__
+    else:
+        error = (Generic in cls.__bases__ and
+                    cls.__name__ != 'Protocol' and
+                    type(cls) != _TypedDictMeta)
+    if error:
+        raise TypeError("Cannot inherit from plain Generic")
+    if '__orig_bases__' in cls.__dict__:
+        tvars = _collect_parameters(cls.__orig_bases__)
+        # Look for Generic[T1, ..., Tn].
+        # If found, tvars must be a subset of it.
+        # If not found, tvars is it.
+        # Also check for and reject plain Generic,
+        # and reject multiple Generic[...].
+        gvars = None
+        for base in cls.__orig_bases__:
+            if (isinstance(base, _GenericAlias) and
+                    base.__origin__ is Generic):
+                if gvars is not None:
+                    raise TypeError(
+                        "Cannot inherit from Generic[...] multiple times.")
+                gvars = base.__parameters__
+        if gvars is not None:
+            tvarset = set(tvars)
+            gvarset = set(gvars)
+            if not tvarset <= gvarset:
+                s_vars = ', '.join(str(t) for t in tvars if t not in gvarset)
+                s_args = ', '.join(str(g) for g in gvars)
+                raise TypeError(f"Some type variables ({s_vars}) are"
+                                f" not listed in Generic[{s_args}]")
+            tvars = gvars
+    cls.__parameters__ = tuple(tvars)
 
-    def __typing_prepare_subst__(self, alias, args):
-        params = alias.__parameters__
-        i = params.index(self)
-        if i >= len(args):
-            raise TypeError(f"Too few arguments for {alias}")
-        # Special case where Z[[int, str, bool]] == Z[int, str, bool] in PEP 612.
-        if len(params) == 1 and not _is_param_expr(args[0]):
-            assert i == 0
-            args = (args,)
-        # Convert lists to tuples to help other libraries cache the results.
-        elif isinstance(args[i], list):
-            args = (*args[:i], tuple(args[i]), *args[i+1:])
-        return args
 
 def _is_dunder(attr):
     return attr.startswith('__') and attr.endswith('__')
@@ -1302,8 +1167,7 @@ class _BaseGenericAlias(_Final, _root=True):
         raise AttributeError(attr)
 
     def __setattr__(self, attr, val):
-        if _is_dunder(attr) or attr in {'_name', '_inst', '_nparams',
-                                        '_paramspec_tvars'}:
+        if _is_dunder(attr) or attr in {'_name', '_inst', '_nparams'}:
             super().__setattr__(attr, val)
         else:
             setattr(self.__origin__, attr, val)
@@ -1341,8 +1205,7 @@ class _GenericAlias(_BaseGenericAlias, _root=True):
     #  * Note that native container types, e.g. `tuple`, `list`, use
     #    `types.GenericAlias` instead.
     # * Parameterized classes:
-    #     T = TypeVar('T')
-    #     class C(Generic[T]): pass
+    #     class C[T]: pass
     #     # C[int] is a _GenericAlias
     # * `Callable` aliases, generic `Callable` aliases, and
     #   parameterized `Callable` aliases:
@@ -1357,15 +1220,13 @@ class _GenericAlias(_BaseGenericAlias, _root=True):
     #     ClassVar[float]
     #     TypeVar[bool]
 
-    def __init__(self, origin, args, *, inst=True, name=None,
-                 _paramspec_tvars=False):
+    def __init__(self, origin, args, *, inst=True, name=None):
         super().__init__(origin, inst=inst, name=name)
         if not isinstance(args, tuple):
             args = (args,)
         self.__args__ = tuple(... if a is _TypingEllipsis else
                               a for a in args)
         self.__parameters__ = _collect_parameters(args)
-        self._paramspec_tvars = _paramspec_tvars
         if not name:
             self.__module__ = origin.__module__
 
@@ -1508,8 +1369,7 @@ class _GenericAlias(_BaseGenericAlias, _root=True):
         return new_args
 
     def copy_with(self, args):
-        return self.__class__(self.__origin__, args, name=self._name, inst=self._inst,
-                              _paramspec_tvars=self._paramspec_tvars)
+        return self.__class__(self.__origin__, args, name=self._name, inst=self._inst)
 
     def __repr__(self):
         if self._name:
@@ -1599,6 +1459,22 @@ class _SpecialGenericAlias(_NotIterable, _BaseGenericAlias, _root=True):
     def __ror__(self, left):
         return Union[left, self]
 
+
+class _DeprecatedGenericAlias(_SpecialGenericAlias, _root=True):
+    def __init__(
+        self, origin, nparams, *, removal_version, inst=True, name=None
+    ):
+        super().__init__(origin, nparams, inst=inst, name=name)
+        self._removal_version = removal_version
+
+    def __instancecheck__(self, inst):
+        import warnings
+        warnings._deprecated(
+            f"{self.__module__}.{self._name}", remove=self._removal_version
+        )
+        return super().__instancecheck__(inst)
+
+
 class _CallableGenericAlias(_NotIterable, _GenericAlias, _root=True):
     def __repr__(self):
         assert self._name == 'Callable'
@@ -1619,8 +1495,7 @@ class _CallableGenericAlias(_NotIterable, _GenericAlias, _root=True):
 class _CallableType(_SpecialGenericAlias, _root=True):
     def copy_with(self, params):
         return _CallableGenericAlias(self.__origin__, params,
-                                     name=self._name, inst=self._inst,
-                                     _paramspec_tvars=True)
+                                     name=self._name, inst=self._inst)
 
     def __getitem__(self, params):
         if not isinstance(params, tuple) or len(params) != 2:
@@ -1748,10 +1623,26 @@ def Unpack(self, parameters):
         Foo[*tuple[int, str]]
         class Bar(Generic[*Ts]): ...
 
+    And from Python 3.12, it can be done using built-in syntax for generics::
+
+        Foo[*tuple[int, str]]
+        class Bar[*Ts]: ...
+
+    The operator can also be used along with a `TypedDict` to annotate
+    `**kwargs` in a function signature::
+
+        class Movie(TypedDict):
+            name: str
+            year: int
+
+        # This function expects two keyword arguments - *name* of type `str` and
+        # *year* of type `int`.
+        def foo(**kwargs: Unpack[Movie]): ...
+
     Note that there is only some runtime checking of this operator. Not
     everything the runtime allows may be accepted by static type checkers.
 
-    For more information, see PEP 646.
+    For more information, see PEPs 646 and 692.
     """
     item = _type_check(parameters, f'{self} accepts only single type.')
     return _UnpackGenericAlias(origin=self, args=(item,))
@@ -1761,7 +1652,7 @@ class _UnpackGenericAlias(_GenericAlias, _root=True):
     def __repr__(self):
         # `Unpack` only takes one argument, so __args__ should contain only
         # a single item.
-        return '*' + repr(self.__args__[0])
+        return f'typing.Unpack[{_type_repr(self.__args__[0])}]'
 
     def __getitem__(self, args):
         if self.__typing_is_unpacked_typevartuple__:
@@ -1785,127 +1676,24 @@ class _UnpackGenericAlias(_GenericAlias, _root=True):
         return isinstance(self.__args__[0], TypeVarTuple)
 
 
-class Generic:
-    """Abstract base class for generic types.
-
-    A generic type is typically declared by inheriting from
-    this class parameterized with one or more type variables.
-    For example, a generic mapping type might be defined as::
-
-      class Mapping(Generic[KT, VT]):
-          def __getitem__(self, key: KT) -> VT:
-              ...
-          # Etc.
-
-    This class can then be used as follows::
-
-      def lookup_name(mapping: Mapping[KT, VT], key: KT, default: VT) -> VT:
-          try:
-              return mapping[key]
-          except KeyError:
-              return default
-    """
-    __slots__ = ()
-    _is_protocol = False
-
-    @_tp_cache
-    def __class_getitem__(cls, params):
-        """Parameterizes a generic class.
-
-        At least, parameterizing a generic class is the *main* thing this method
-        does. For example, for some generic class `Foo`, this is called when we
-        do `Foo[int]` - there, with `cls=Foo` and `params=int`.
-
-        However, note that this method is also called when defining generic
-        classes in the first place with `class Foo(Generic[T]): ...`.
-        """
-        if not isinstance(params, tuple):
-            params = (params,)
-
-        params = tuple(_type_convert(p) for p in params)
-        if cls in (Generic, Protocol):
-            # Generic and Protocol can only be subscripted with unique type variables.
-            if not params:
-                raise TypeError(
-                    f"Parameter list to {cls.__qualname__}[...] cannot be empty"
-                )
-            if not all(_is_typevar_like(p) for p in params):
-                raise TypeError(
-                    f"Parameters to {cls.__name__}[...] must all be type variables "
-                    f"or parameter specification variables.")
-            if len(set(params)) != len(params):
-                raise TypeError(
-                    f"Parameters to {cls.__name__}[...] must all be unique")
-        else:
-            # Subscripting a regular Generic subclass.
-            for param in cls.__parameters__:
-                prepare = getattr(param, '__typing_prepare_subst__', None)
-                if prepare is not None:
-                    params = prepare(cls, params)
-            _check_generic(cls, params, len(cls.__parameters__))
-
-            new_args = []
-            for param, new_arg in zip(cls.__parameters__, params):
-                if isinstance(param, TypeVarTuple):
-                    new_args.extend(new_arg)
-                else:
-                    new_args.append(new_arg)
-            params = tuple(new_args)
-
-        return _GenericAlias(cls, params,
-                             _paramspec_tvars=True)
-
-    def __init_subclass__(cls, *args, **kwargs):
-        super().__init_subclass__(*args, **kwargs)
-        tvars = []
-        if '__orig_bases__' in cls.__dict__:
-            error = Generic in cls.__orig_bases__
-        else:
-            error = (Generic in cls.__bases__ and
-                        cls.__name__ != 'Protocol' and
-                        type(cls) != _TypedDictMeta)
-        if error:
-            raise TypeError("Cannot inherit from plain Generic")
-        if '__orig_bases__' in cls.__dict__:
-            tvars = _collect_parameters(cls.__orig_bases__)
-            # Look for Generic[T1, ..., Tn].
-            # If found, tvars must be a subset of it.
-            # If not found, tvars is it.
-            # Also check for and reject plain Generic,
-            # and reject multiple Generic[...].
-            gvars = None
-            for base in cls.__orig_bases__:
-                if (isinstance(base, _GenericAlias) and
-                        base.__origin__ is Generic):
-                    if gvars is not None:
-                        raise TypeError(
-                            "Cannot inherit from Generic[...] multiple times.")
-                    gvars = base.__parameters__
-            if gvars is not None:
-                tvarset = set(tvars)
-                gvarset = set(gvars)
-                if not tvarset <= gvarset:
-                    s_vars = ', '.join(str(t) for t in tvars if t not in gvarset)
-                    s_args = ', '.join(str(g) for g in gvars)
-                    raise TypeError(f"Some type variables ({s_vars}) are"
-                                    f" not listed in Generic[{s_args}]")
-                tvars = gvars
-        cls.__parameters__ = tuple(tvars)
-
-
 class _TypingEllipsis:
     """Internal placeholder for ... (ellipsis)."""
 
 
-_TYPING_INTERNALS = ['__parameters__', '__orig_bases__',  '__orig_class__',
-                     '_is_protocol', '_is_runtime_protocol', '__final__']
+_TYPING_INTERNALS = frozenset({
+    '__parameters__', '__orig_bases__',  '__orig_class__',
+    '_is_protocol', '_is_runtime_protocol', '__protocol_attrs__',
+    '__non_callable_proto_members__', '__type_params__',
+})
 
-_SPECIAL_NAMES = ['__abstractmethods__', '__annotations__', '__dict__', '__doc__',
-                  '__init__', '__module__', '__new__', '__slots__',
-                  '__subclasshook__', '__weakref__', '__class_getitem__']
+_SPECIAL_NAMES = frozenset({
+    '__abstractmethods__', '__annotations__', '__dict__', '__doc__',
+    '__init__', '__module__', '__new__', '__slots__',
+    '__subclasshook__', '__weakref__', '__class_getitem__'
+})
 
 # These special attributes will be not collected as protocol members.
-EXCLUDED_ATTRIBUTES = _TYPING_INTERNALS + _SPECIAL_NAMES + ['_MutableMapping__marker']
+EXCLUDED_ATTRIBUTES = _TYPING_INTERNALS | _SPECIAL_NAMES | {'_MutableMapping__marker'}
 
 
 def _get_protocol_attrs(cls):
@@ -1916,20 +1704,15 @@ def _get_protocol_attrs(cls):
     """
     attrs = set()
     for base in cls.__mro__[:-1]:  # without object
-        if base.__name__ in ('Protocol', 'Generic'):
+        if base.__name__ in {'Protocol', 'Generic'}:
             continue
         annotations = getattr(base, '__annotations__', {})
-        for attr in list(base.__dict__.keys()) + list(annotations.keys()):
+        for attr in (*base.__dict__, *annotations):
             if not attr.startswith('_abc_') and attr not in EXCLUDED_ATTRIBUTES:
                 attrs.add(attr)
     return attrs
 
 
-def _is_callable_members_only(cls):
-    # PEP 544 prohibits using issubclass() with protocols that have non-method members.
-    return all(callable(getattr(cls, attr, None)) for attr in _get_protocol_attrs(cls))
-
-
 def _no_init_or_replace_init(self, *args, **kwargs):
     cls = type(self)
 
@@ -1961,12 +1744,16 @@ def _no_init_or_replace_init(self, *args, **kwargs):
 
 def _caller(depth=1, default='__main__'):
     try:
+        return sys._getframemodulename(depth + 1) or default
+    except AttributeError:  # For platforms without _getframemodulename()
+        pass
+    try:
         return sys._getframe(depth + 1).f_globals.get('__name__', default)
     except (AttributeError, ValueError):  # For platforms without _getframe()
-        return None
-
+        pass
+    return None
 
-def _allow_reckless_class_checks(depth=3):
+def _allow_reckless_class_checks(depth=2):
     """Allow instance and class checks for special stdlib modules.
 
     The abc and functools modules indiscriminately call isinstance() and
@@ -1978,38 +1765,143 @@ def _allow_reckless_class_checks(depth=3):
 _PROTO_ALLOWLIST = {
     'collections.abc': [
         'Callable', 'Awaitable', 'Iterable', 'Iterator', 'AsyncIterable',
-        'Hashable', 'Sized', 'Container', 'Collection', 'Reversible',
+        'Hashable', 'Sized', 'Container', 'Collection', 'Reversible', 'Buffer',
     ],
     'contextlib': ['AbstractContextManager', 'AbstractAsyncContextManager'],
 }
 
 
+@functools.cache
+def _lazy_load_getattr_static():
+    # Import getattr_static lazily so as not to slow down the import of typing.py
+    # Cache the result so we don't slow down _ProtocolMeta.__instancecheck__ unnecessarily
+    from inspect import getattr_static
+    return getattr_static
+
+
+_cleanups.append(_lazy_load_getattr_static.cache_clear)
+
+def _pickle_psargs(psargs):
+    return ParamSpecArgs, (psargs.__origin__,)
+
+copyreg.pickle(ParamSpecArgs, _pickle_psargs)
+
+def _pickle_pskwargs(pskwargs):
+    return ParamSpecKwargs, (pskwargs.__origin__,)
+
+copyreg.pickle(ParamSpecKwargs, _pickle_pskwargs)
+
+del _pickle_psargs, _pickle_pskwargs
+
+
 class _ProtocolMeta(ABCMeta):
-    # This metaclass is really unfortunate and exists only because of
-    # the lack of __instancehook__.
+    # This metaclass is somewhat unfortunate,
+    # but is necessary for several reasons...
+    def __new__(mcls, name, bases, namespace, /, **kwargs):
+        if name == "Protocol" and bases == (Generic,):
+            pass
+        elif Protocol in bases:
+            for base in bases:
+                if not (
+                    base in {object, Generic}
+                    or base.__name__ in _PROTO_ALLOWLIST.get(base.__module__, [])
+                    or (
+                        issubclass(base, Generic)
+                        and getattr(base, "_is_protocol", False)
+                    )
+                ):
+                    raise TypeError(
+                        f"Protocols can only inherit from other protocols, "
+                        f"got {base!r}"
+                    )
+        return super().__new__(mcls, name, bases, namespace, **kwargs)
+
+    def __init__(cls, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if getattr(cls, "_is_protocol", False):
+            cls.__protocol_attrs__ = _get_protocol_attrs(cls)
+
+    def __subclasscheck__(cls, other):
+        if cls is Protocol:
+            return type.__subclasscheck__(cls, other)
+        if (
+            getattr(cls, '_is_protocol', False)
+            and not _allow_reckless_class_checks()
+        ):
+            if not isinstance(other, type):
+                # Same error message as for issubclass(1, int).
+                raise TypeError('issubclass() arg 1 must be a class')
+            if not getattr(cls, '_is_runtime_protocol', False):
+                raise TypeError(
+                    "Instance and class checks can only be used with "
+                    "@runtime_checkable protocols"
+                )
+            if (
+                # this attribute is set by @runtime_checkable:
+                cls.__non_callable_proto_members__
+                and cls.__dict__.get("__subclasshook__") is _proto_hook
+            ):
+                raise TypeError(
+                    "Protocols with non-method members don't support issubclass()"
+                )
+        return super().__subclasscheck__(other)
+
     def __instancecheck__(cls, instance):
         # We need this method for situations where attributes are
         # assigned in __init__.
+        if cls is Protocol:
+            return type.__instancecheck__(cls, instance)
+        if not getattr(cls, "_is_protocol", False):
+            # i.e., it's a concrete subclass of a protocol
+            return super().__instancecheck__(instance)
+
         if (
-            getattr(cls, '_is_protocol', False) and
             not getattr(cls, '_is_runtime_protocol', False) and
-            not _allow_reckless_class_checks(depth=2)
+            not _allow_reckless_class_checks()
         ):
             raise TypeError("Instance and class checks can only be used with"
                             " @runtime_checkable protocols")
 
-        if ((not getattr(cls, '_is_protocol', False) or
-                _is_callable_members_only(cls)) and
-                issubclass(instance.__class__, cls)):
+        if super().__instancecheck__(instance):
             return True
-        if cls._is_protocol:
-            if all(hasattr(instance, attr) and
-                    # All *methods* can be blocked by setting them to None.
-                    (not callable(getattr(cls, attr, None)) or
-                     getattr(instance, attr) is not None)
-                    for attr in _get_protocol_attrs(cls)):
-                return True
-        return super().__instancecheck__(instance)
+
+        getattr_static = _lazy_load_getattr_static()
+        for attr in cls.__protocol_attrs__:
+            try:
+                val = getattr_static(instance, attr)
+            except AttributeError:
+                break
+            # this attribute is set by @runtime_checkable:
+            if val is None and attr not in cls.__non_callable_proto_members__:
+                break
+        else:
+            return True
+
+        return False
+
+
+@classmethod
+def _proto_hook(cls, other):
+    if not cls.__dict__.get('_is_protocol', False):
+        return NotImplemented
+
+    for attr in cls.__protocol_attrs__:
+        for base in other.__mro__:
+            # Check if the members appears in the class dictionary...
+            if attr in base.__dict__:
+                if base.__dict__[attr] is None:
+                    return NotImplemented
+                break
+
+            # ...or in annotations, if it is a sub-protocol.
+            annotations = getattr(base, '__annotations__', {})
+            if (isinstance(annotations, collections.abc.Mapping) and
+                    attr in annotations and
+                    issubclass(other, Generic) and getattr(other, '_is_protocol', False)):
+                break
+        else:
+            return NotImplemented
+    return True
 
 
 class Protocol(Generic, metaclass=_ProtocolMeta):
@@ -2040,7 +1932,7 @@ class Protocol(Generic, metaclass=_ProtocolMeta):
     only the presence of given attributes, ignoring their type signatures.
     Protocol classes can be generic, they are defined as::
 
-        class GenProto(Protocol[T]):
+        class GenProto[T](Protocol):
             def meth(self) -> T:
                 ...
     """
@@ -2057,60 +1949,11 @@ class Protocol(Generic, metaclass=_ProtocolMeta):
             cls._is_protocol = any(b is Protocol for b in cls.__bases__)
 
         # Set (or override) the protocol subclass hook.
-        def _proto_hook(other):
-            if not cls.__dict__.get('_is_protocol', False):
-                return NotImplemented
-
-            # First, perform various sanity checks.
-            if not getattr(cls, '_is_runtime_protocol', False):
-                if _allow_reckless_class_checks():
-                    return NotImplemented
-                raise TypeError("Instance and class checks can only be used with"
-                                " @runtime_checkable protocols")
-            if not _is_callable_members_only(cls):
-                if _allow_reckless_class_checks():
-                    return NotImplemented
-                raise TypeError("Protocols with non-method members"
-                                " don't support issubclass()")
-            if not isinstance(other, type):
-                # Same error message as for issubclass(1, int).
-                raise TypeError('issubclass() arg 1 must be a class')
-
-            # Second, perform the actual structural compatibility check.
-            for attr in _get_protocol_attrs(cls):
-                for base in other.__mro__:
-                    # Check if the members appears in the class dictionary...
-                    if attr in base.__dict__:
-                        if base.__dict__[attr] is None:
-                            return NotImplemented
-                        break
-
-                    # ...or in annotations, if it is a sub-protocol.
-                    annotations = getattr(base, '__annotations__', {})
-                    if (isinstance(annotations, collections.abc.Mapping) and
-                            attr in annotations and
-                            issubclass(other, Generic) and other._is_protocol):
-                        break
-                else:
-                    return NotImplemented
-            return True
-
         if '__subclasshook__' not in cls.__dict__:
             cls.__subclasshook__ = _proto_hook
 
-        # We have nothing more to do for non-protocols...
-        if not cls._is_protocol:
-            return
-
-        # ... otherwise check consistency of bases, and prohibit instantiation.
-        for base in cls.__bases__:
-            if not (base in (object, Generic) or
-                    base.__module__ in _PROTO_ALLOWLIST and
-                    base.__name__ in _PROTO_ALLOWLIST[base.__module__] or
-                    issubclass(base, Generic) and base._is_protocol):
-                raise TypeError('Protocols can only inherit from other'
-                                ' protocols, got %r' % base)
-        if cls.__init__ is Protocol.__init__:
+        # Prohibit instantiation for protocol classes
+        if cls._is_protocol and cls.__init__ is Protocol.__init__:
             cls.__init__ = _no_init_or_replace_init
 
 
@@ -2129,7 +1972,7 @@ class _AnnotatedAlias(_NotIterable, _GenericAlias, _root=True):
         if isinstance(origin, _AnnotatedAlias):
             metadata = origin.__metadata__ + metadata
             origin = origin.__origin__
-        super().__init__(origin, origin)
+        super().__init__(origin, origin, name='Annotated')
         self.__metadata__ = metadata
 
     def copy_with(self, params):
@@ -2162,6 +2005,9 @@ class _AnnotatedAlias(_NotIterable, _GenericAlias, _root=True):
             return 'Annotated'
         return super().__getattr__(attr)
 
+    def __mro_entries__(self, bases):
+        return (self.__origin__,)
+
 
 class Annotated:
     """Add context-specific metadata to a type.
@@ -2191,15 +2037,17 @@ class Annotated:
 
     - Annotated can be used as a generic type alias::
 
-        Optimized: TypeAlias = Annotated[T, runtime.Optimize()]
-        assert Optimized[int] == Annotated[int, runtime.Optimize()]
+        type Optimized[T] = Annotated[T, runtime.Optimize()]
+        # type checker will treat Optimized[int]
+        # as equivalent to Annotated[int, runtime.Optimize()]
 
-        OptimizedList: TypeAlias = Annotated[list[T], runtime.Optimize()]
-        assert OptimizedList[int] == Annotated[list[int], runtime.Optimize()]
+        type OptimizedList[T] = Annotated[list[T], runtime.Optimize()]
+        # type checker will treat OptimizedList[int]
+        # as equivalent to Annotated[list[int], runtime.Optimize()]
 
     - Annotated cannot be used with an unpacked TypeVarTuple::
 
-        Variadic: TypeAlias = Annotated[*Ts, Ann1]  # NOT valid
+        type Variadic[*Ts] = Annotated[*Ts, Ann1]  # NOT valid
 
       This would be equivalent to::
 
@@ -2258,10 +2106,26 @@ def runtime_checkable(cls):
     Warning: this will check only the presence of the required methods,
     not their type signatures!
     """
-    if not issubclass(cls, Generic) or not cls._is_protocol:
+    if not issubclass(cls, Generic) or not getattr(cls, '_is_protocol', False):
         raise TypeError('@runtime_checkable can be only applied to protocol classes,'
                         ' got %r' % cls)
     cls._is_runtime_protocol = True
+    # PEP 544 prohibits using issubclass()
+    # with protocols that have non-method members.
+    # See gh-113320 for why we compute this attribute here,
+    # rather than in `_ProtocolMeta.__init__`
+    cls.__non_callable_proto_members__ = set()
+    for attr in cls.__protocol_attrs__:
+        try:
+            is_callable = callable(getattr(cls, attr, None))
+        except Exception as e:
+            raise TypeError(
+                f"Failed to determine whether protocol member {attr!r} "
+                "is a method member"
+            ) from e
+        else:
+            if not is_callable:
+                cls.__non_callable_proto_members__.add(attr)
     return cls
 
 
@@ -2681,8 +2545,9 @@ def final(f):
     return f
 
 
-# Some unconstrained type variables.  These are used by the container types.
-# (These are not for export.)
+# Some unconstrained type variables.  These were initially used by the container types.
+# They were never meant for export and are now unused, but we keep them around to
+# avoid breaking compatibility with users who import them.
 T = TypeVar('T')  # Any type.
 KT = TypeVar('KT')  # Key type.
 VT = TypeVar('VT')  # Value type.
@@ -2693,6 +2558,7 @@ T_contra = TypeVar('T_contra', contravariant=True)  # Ditto contravariant.
 # Internal type variable used for Type[].
 CT_co = TypeVar('CT_co', covariant=True, bound=type)
 
+
 # A useful type variable with constraints.  This represents string types.
 # (This one *is* for export!)
 AnyStr = TypeVar('AnyStr', bytes, str)
@@ -2734,7 +2600,9 @@ Mapping = _alias(collections.abc.Mapping, 2)
 MutableMapping = _alias(collections.abc.MutableMapping, 2)
 Sequence = _alias(collections.abc.Sequence, 1)
 MutableSequence = _alias(collections.abc.MutableSequence, 1)
-ByteString = _alias(collections.abc.ByteString, 0)  # Not generic
+ByteString = _DeprecatedGenericAlias(
+    collections.abc.ByteString, 0, removal_version=(3, 14)  # Not generic.
+)
 # Tuple accepts variable number of parameters.
 Tuple = _TupleType(tuple, -1, inst=False, name='Tuple')
 Tuple.__doc__ = \
@@ -2780,8 +2648,7 @@ Type.__doc__ = \
     And a function that takes a class argument that's a subclass of
     User and returns an instance of the corresponding class::
 
-        U = TypeVar('U', bound=User)
-        def new_user(user_class: Type[U]) -> U:
+        def new_user[U](user_class: Type[U]) -> U:
             user = user_class()
             # (Here we could write the user object to a database)
             return user
@@ -2848,24 +2715,24 @@ class SupportsIndex(Protocol):
 
 
 @runtime_checkable
-class SupportsAbs(Protocol[T_co]):
+class SupportsAbs[T](Protocol):
     """An ABC with one abstract method __abs__ that is covariant in its return type."""
 
     __slots__ = ()
 
     @abstractmethod
-    def __abs__(self) -> T_co:
+    def __abs__(self) -> T:
         pass
 
 
 @runtime_checkable
-class SupportsRound(Protocol[T_co]):
+class SupportsRound[T](Protocol):
     """An ABC with one abstract method __round__ that is covariant in its return type."""
 
     __slots__ = ()
 
     @abstractmethod
-    def __round__(self, ndigits: int = 0) -> T_co:
+    def __round__(self, ndigits: int = 0) -> T:
         pass
 
 
@@ -2910,7 +2777,7 @@ class NamedTupleMeta(type):
                                module=ns['__module__'])
         nm_tpl.__bases__ = bases
         if Generic in bases:
-            class_getitem = Generic.__class_getitem__.__func__
+            class_getitem = _generic_class_getitem
             nm_tpl.__class_getitem__ = classmethod(class_getitem)
         # update from user namespace without overriding special namedtuple attributes
         for key in ns:
@@ -2948,7 +2815,9 @@ def NamedTuple(typename, fields=None, /, **kwargs):
     elif kwargs:
         raise TypeError("Either list of fields or keywords"
                         " can be provided to NamedTuple, not both")
-    return _make_nmtuple(typename, fields, module=_caller())
+    nt = _make_nmtuple(typename, fields, module=_caller())
+    nt.__orig_bases__ = (NamedTuple,)
+    return nt
 
 _NamedTuple = type.__new__(NamedTupleMeta, 'NamedTuple', (), {})
 
@@ -2980,6 +2849,9 @@ class _TypedDictMeta(type):
 
         tp_dict = type.__new__(_TypedDictMeta, name, (*generic_base, dict), ns)
 
+        if not hasattr(tp_dict, '__orig_bases__'):
+            tp_dict.__orig_bases__ = bases
+
         annotations = {}
         own_annotations = ns.get('__annotations__', {})
         msg = "TypedDict('Name', {f0: t0, f1: t1, ...}); each t must be a type"
@@ -3111,7 +2983,9 @@ def TypedDict(typename, fields=None, /, *, total=True, **kwargs):
         # Setting correct module is necessary to make typed dict classes pickleable.
         ns['__module__'] = module
 
-    return _TypedDictMeta(typename, (), ns, total=total)
+    td = _TypedDictMeta(typename, (), ns, total=total)
+    td.__orig_bases__ = (TypedDict,)
+    return td
 
 _TypedDict = type.__new__(_TypedDictMeta, 'TypedDict', (), {})
 TypedDict.__mro_entries__ = lambda bases: (_TypedDict,)
@@ -3418,7 +3292,7 @@ re.__name__ = __name__ + '.re'
 sys.modules[re.__name__] = re
 
 
-def reveal_type(obj: T, /) -> T:
+def reveal_type[T](obj: T, /) -> T:
     """Ask a static type checker to reveal the inferred type of an expression.
 
     When a static type checker encounters a call to ``reveal_type()``,
@@ -3437,24 +3311,28 @@ def reveal_type(obj: T, /) -> T:
     return obj
 
 
+class _IdentityCallable(Protocol):
+    def __call__[T](self, arg: T, /) -> T:
+        ...
+
+
 def dataclass_transform(
     *,
     eq_default: bool = True,
     order_default: bool = False,
     kw_only_default: bool = False,
+    frozen_default: bool = False,
     field_specifiers: tuple[type[Any] | Callable[..., Any], ...] = (),
     **kwargs: Any,
-) -> Callable[[T], T]:
+) -> _IdentityCallable:
     """Decorator to mark an object as providing dataclass-like behaviour.
 
     The decorator can be applied to a function, class, or metaclass.
 
     Example usage with a decorator function::
 
-        T = TypeVar("T")
-
         @dataclass_transform()
-        def create_model(cls: type[T]) -> type[T]:
+        def create_model[T](cls: type[T]) -> type[T]:
             ...
             return cls
 
@@ -3496,6 +3374,8 @@ def dataclass_transform(
         assumed to be True or False if it is omitted by the caller.
     - ``kw_only_default`` indicates whether the ``kw_only`` parameter is
         assumed to be True or False if it is omitted by the caller.
+    - ``frozen_default`` indicates whether the ``frozen`` parameter is
+        assumed to be True or False if it is omitted by the caller.
     - ``field_specifiers`` specifies a static list of supported classes
         or functions that describe fields, similar to ``dataclasses.field()``.
     - Arbitrary other keyword arguments are accepted in order to allow for
@@ -3512,8 +3392,47 @@ def dataclass_transform(
             "eq_default": eq_default,
             "order_default": order_default,
             "kw_only_default": kw_only_default,
+            "frozen_default": frozen_default,
             "field_specifiers": field_specifiers,
             "kwargs": kwargs,
         }
         return cls_or_fn
     return decorator
+
+
+type _Func = Callable[..., Any]
+
+
+def override[F: _Func](method: F, /) -> F:
+    """Indicate that a method is intended to override a method in a base class.
+
+    Usage::
+
+        class Base:
+            def method(self) -> None:
+                pass
+
+        class Child(Base):
+            @override
+            def method(self) -> None:
+                super().method()
+
+    When this decorator is applied to a method, the type checker will
+    validate that it overrides a method or attribute with the same name on a
+    base class.  This helps prevent bugs that may occur when a base class is
+    changed without an equivalent change to a child class.
+
+    There is no runtime checking of this property. The decorator attempts to
+    set the ``__override__`` attribute to ``True`` on the decorated object to
+    allow runtime introspection.
+
+    See PEP 698 for details.
+    """
+    try:
+        method.__override__ = True
+    except (AttributeError, TypeError):
+        # Skip the attribute silently if it is not writable.
+        # AttributeError happens if the object has __slots__ or a
+        # read-only property, TypeError if it's a builtin class.
+        pass
+    return method
diff --git a/contrib/tools/python3/src/Lib/unittest/__init__.py b/contrib/tools/python3/src/Lib/unittest/__init__.py
index 005d23f6d0..5bcbf83484 100644
--- a/contrib/tools/python3/src/Lib/unittest/__init__.py
+++ b/contrib/tools/python3/src/Lib/unittest/__init__.py
@@ -69,19 +69,6 @@ from .signals import installHandler, registerResult, removeResult, removeHandler
 # IsolatedAsyncioTestCase will be imported lazily.
 from .loader import makeSuite, getTestCaseNames, findTestCases
 
-# deprecated
-_TextTestResult = TextTestResult
-
-
-# There are no tests here, so don't try to run anything discovered from
-# introspecting the symbols (e.g. FunctionTestCase). Instead, all our
-# tests come from within unittest.test.
-def load_tests(loader, tests, pattern):
-    import os.path
-    # top level directory cached on loader instance
-    this_dir = os.path.dirname(__file__)
-    return loader.discover(start_dir=this_dir, pattern=pattern)
-
 
 # Lazy import of IsolatedAsyncioTestCase from .async_case
 # It imports asyncio, which is relatively heavy, but most tests
diff --git a/contrib/tools/python3/src/Lib/unittest/case.py b/contrib/tools/python3/src/Lib/unittest/case.py
index c4aa2d7721..001b640dc4 100644
--- a/contrib/tools/python3/src/Lib/unittest/case.py
+++ b/contrib/tools/python3/src/Lib/unittest/case.py
@@ -9,6 +9,7 @@ import warnings
 import collections
 import contextlib
 import traceback
+import time
 import types
 
 from . import result
@@ -572,6 +573,15 @@ class TestCase(object):
         else:
             addUnexpectedSuccess(self)
 
+    def _addDuration(self, result, elapsed):
+        try:
+            addDuration = result.addDuration
+        except AttributeError:
+            warnings.warn("TestResult has no addDuration method",
+                          RuntimeWarning)
+        else:
+            addDuration(self, elapsed)
+
     def _callSetUp(self):
         self.setUp()
 
@@ -612,6 +622,7 @@ class TestCase(object):
                 getattr(testMethod, "__unittest_expecting_failure__", False)
             )
             outcome = _Outcome(result)
+            start_time = time.perf_counter()
             try:
                 self._outcome = outcome
 
@@ -625,6 +636,7 @@ class TestCase(object):
                     with outcome.testPartExecutor(self):
                         self._callTearDown()
                 self.doCleanups()
+                self._addDuration(result, (time.perf_counter() - start_time))
 
                 if outcome.success:
                     if expecting_failure:
@@ -1171,35 +1183,6 @@ class TestCase(object):
             standardMsg = self._truncateMessage(standardMsg, diff)
             self.fail(self._formatMessage(msg, standardMsg))
 
-    def assertDictContainsSubset(self, subset, dictionary, msg=None):
-        """Checks whether dictionary is a superset of subset."""
-        warnings.warn('assertDictContainsSubset is deprecated',
-                      DeprecationWarning)
-        missing = []
-        mismatched = []
-        for key, value in subset.items():
-            if key not in dictionary:
-                missing.append(key)
-            elif value != dictionary[key]:
-                mismatched.append('%s, expected: %s, actual: %s' %
-                                  (safe_repr(key), safe_repr(value),
-                                   safe_repr(dictionary[key])))
-
-        if not (missing or mismatched):
-            return
-
-        standardMsg = ''
-        if missing:
-            standardMsg = 'Missing: %s' % ','.join(safe_repr(m) for m in
-                                                    missing)
-        if mismatched:
-            if standardMsg:
-                standardMsg += '; '
-            standardMsg += 'Mismatched values: %s' % ','.join(mismatched)
-
-        self.fail(self._formatMessage(msg, standardMsg))
-
-
     def assertCountEqual(self, first, second, msg=None):
         """Asserts that two iterables have the same elements, the same number of
         times, without regard to order.
@@ -1234,19 +1217,34 @@ class TestCase(object):
 
     def assertMultiLineEqual(self, first, second, msg=None):
         """Assert that two multi-line strings are equal."""
-        self.assertIsInstance(first, str, 'First argument is not a string')
-        self.assertIsInstance(second, str, 'Second argument is not a string')
+        self.assertIsInstance(first, str, "First argument is not a string")
+        self.assertIsInstance(second, str, "Second argument is not a string")
 
         if first != second:
-            # don't use difflib if the strings are too long
+            # Don't use difflib if the strings are too long
             if (len(first) > self._diffThreshold or
                 len(second) > self._diffThreshold):
                 self._baseAssertEqual(first, second, msg)
-            firstlines = first.splitlines(keepends=True)
-            secondlines = second.splitlines(keepends=True)
-            if len(firstlines) == 1 and first.strip('\r\n') == first:
-                firstlines = [first + '\n']
-                secondlines = [second + '\n']
+
+            # Append \n to both strings if either is missing the \n.
+            # This allows the final ndiff to show the \n difference. The
+            # exception here is if the string is empty, in which case no
+            # \n should be added
+            first_presplit = first
+            second_presplit = second
+            if first and second:
+                if first[-1] != '\n' or second[-1] != '\n':
+                    first_presplit += '\n'
+                    second_presplit += '\n'
+            elif second and second[-1] != '\n':
+                second_presplit += '\n'
+            elif first and first[-1] != '\n':
+                first_presplit += '\n'
+
+            firstlines = first_presplit.splitlines(keepends=True)
+            secondlines = second_presplit.splitlines(keepends=True)
+
+            # Generate the message and diff, then raise the exception
             standardMsg = '%s != %s' % _common_shorten_repr(first, second)
             diff = '\n' + ''.join(difflib.ndiff(firstlines, secondlines))
             standardMsg = self._truncateMessage(standardMsg, diff)
@@ -1363,27 +1361,6 @@ class TestCase(object):
             raise self.failureException(msg)
 
 
-    def _deprecate(original_func):
-        def deprecated_func(*args, **kwargs):
-            warnings.warn(
-                'Please use {0} instead.'.format(original_func.__name__),
-                DeprecationWarning, 2)
-            return original_func(*args, **kwargs)
-        return deprecated_func
-
-    # see #9424
-    failUnlessEqual = assertEquals = _deprecate(assertEqual)
-    failIfEqual = assertNotEquals = _deprecate(assertNotEqual)
-    failUnlessAlmostEqual = assertAlmostEquals = _deprecate(assertAlmostEqual)
-    failIfAlmostEqual = assertNotAlmostEquals = _deprecate(assertNotAlmostEqual)
-    failUnless = assert_ = _deprecate(assertTrue)
-    failUnlessRaises = _deprecate(assertRaises)
-    failIf = _deprecate(assertFalse)
-    assertRaisesRegexp = _deprecate(assertRaisesRegex)
-    assertRegexpMatches = _deprecate(assertRegex)
-    assertNotRegexpMatches = _deprecate(assertNotRegex)
-
-
 
 class FunctionTestCase(TestCase):
     """A test case that wraps a test function.
diff --git a/contrib/tools/python3/src/Lib/unittest/loader.py b/contrib/tools/python3/src/Lib/unittest/loader.py
index f4e3d6e8f2..f7c1d61f41 100644
--- a/contrib/tools/python3/src/Lib/unittest/loader.py
+++ b/contrib/tools/python3/src/Lib/unittest/loader.py
@@ -6,7 +6,6 @@ import sys
 import traceback
 import types
 import functools
-import warnings
 
 from fnmatch import fnmatch, fnmatchcase
 
@@ -57,9 +56,7 @@ def _make_skipped_test(methodname, exception, suiteClass):
     TestClass = type("ModuleSkipped", (case.TestCase,), attrs)
     return suiteClass((TestClass(methodname),))
 
-def _jython_aware_splitext(path):
-    if path.lower().endswith('$py.class'):
-        return path[:-9]
+def _splitext(path):
     return os.path.splitext(path)[0]
 
 
@@ -97,30 +94,8 @@ class TestLoader(object):
         loaded_suite = self.suiteClass(map(testCaseClass, testCaseNames))
         return loaded_suite
 
-    # XXX After Python 3.5, remove backward compatibility hacks for
-    # use_load_tests deprecation via *args and **kws.  See issue 16662.
-    def loadTestsFromModule(self, module, *args, pattern=None, **kws):
+    def loadTestsFromModule(self, module, *, pattern=None):
         """Return a suite of all test cases contained in the given module"""
-        # This method used to take an undocumented and unofficial
-        # use_load_tests argument.  For backward compatibility, we still
-        # accept the argument (which can also be the first position) but we
-        # ignore it and issue a deprecation warning if it's present.
-        if len(args) > 0 or 'use_load_tests' in kws:
-            warnings.warn('use_load_tests is deprecated and ignored',
-                          DeprecationWarning)
-            kws.pop('use_load_tests', None)
-        if len(args) > 1:
-            # Complain about the number of arguments, but don't forget the
-            # required `module` argument.
-            complaint = len(args) + 1
-            raise TypeError('loadTestsFromModule() takes 1 positional argument but {} were given'.format(complaint))
-        if len(kws) != 0:
-            # Since the keyword arguments are unsorted (see PEP 468), just
-            # pick the alphabetically sorted first argument to complain about,
-            # if multiple were given.  At least the error message will be
-            # predictable.
-            complaint = sorted(kws)[0]
-            raise TypeError("loadTestsFromModule() got an unexpected keyword argument '{}'".format(complaint))
         tests = []
         for name in dir(module):
             obj = getattr(module, name)
@@ -349,7 +324,7 @@ class TestLoader(object):
     def _get_name_from_path(self, path):
         if path == self._top_level_dir:
             return '.'
-        path = _jython_aware_splitext(os.path.normpath(path))
+        path = _splitext(os.path.normpath(path))
 
         _relpath = os.path.relpath(path, self._top_level_dir)
         assert not os.path.isabs(_relpath), "Path must be within the project"
@@ -427,13 +402,13 @@ class TestLoader(object):
             else:
                 mod_file = os.path.abspath(
                     getattr(module, '__file__', full_path))
-                realpath = _jython_aware_splitext(
+                realpath = _splitext(
                     os.path.realpath(mod_file))
-                fullpath_noext = _jython_aware_splitext(
+                fullpath_noext = _splitext(
                     os.path.realpath(full_path))
                 if realpath.lower() != fullpath_noext.lower():
                     module_dir = os.path.dirname(realpath)
-                    mod_name = _jython_aware_splitext(
+                    mod_name = _splitext(
                         os.path.basename(full_path))
                     expected_dir = os.path.dirname(full_path)
                     msg = ("%r module incorrectly imported from %r. Expected "
diff --git a/contrib/tools/python3/src/Lib/unittest/main.py b/contrib/tools/python3/src/Lib/unittest/main.py
index 046fbd3a45..dd4dbf7535 100644
--- a/contrib/tools/python3/src/Lib/unittest/main.py
+++ b/contrib/tools/python3/src/Lib/unittest/main.py
@@ -9,6 +9,7 @@ from . import loader, runner
 from .signals import installHandler
 
 __unittest = True
+_NO_TESTS_EXITCODE = 5
 
 MAIN_EXAMPLES = """\
 Examples:
@@ -66,7 +67,8 @@ class TestProgram(object):
     def __init__(self, module='__main__', defaultTest=None, argv=None,
                     testRunner=None, testLoader=loader.defaultTestLoader,
                     exit=True, verbosity=1, failfast=None, catchbreak=None,
-                    buffer=None, warnings=None, *, tb_locals=False):
+                    buffer=None, warnings=None, *, tb_locals=False,
+                    durations=None):
         if isinstance(module, str):
             self.module = __import__(module)
             for part in module.split('.')[1:]:
@@ -82,6 +84,7 @@ class TestProgram(object):
         self.verbosity = verbosity
         self.buffer = buffer
         self.tb_locals = tb_locals
+        self.durations = durations
         if warnings is None and not sys.warnoptions:
             # even if DeprecationWarnings are ignored by default
             # print them anyway unless other warnings settings are
@@ -178,6 +181,9 @@ class TestProgram(object):
         parser.add_argument('--locals', dest='tb_locals',
                             action='store_true',
                             help='Show local variables in tracebacks')
+        parser.add_argument('--durations', dest='durations', type=int,
+                            default=None, metavar="N",
+                            help='Show the N slowest test cases (N=0 for all)')
         if self.failfast is None:
             parser.add_argument('-f', '--failfast', dest='failfast',
                                 action='store_true',
@@ -258,9 +264,10 @@ class TestProgram(object):
                                                  failfast=self.failfast,
                                                  buffer=self.buffer,
                                                  warnings=self.warnings,
-                                                 tb_locals=self.tb_locals)
+                                                 tb_locals=self.tb_locals,
+                                                 durations=self.durations)
                 except TypeError:
-                    # didn't accept the tb_locals argument
+                    # didn't accept the tb_locals or durations argument
                     testRunner = self.testRunner(verbosity=self.verbosity,
                                                  failfast=self.failfast,
                                                  buffer=self.buffer,
@@ -273,6 +280,12 @@ class TestProgram(object):
             testRunner = self.testRunner
         self.result = testRunner.run(self.test)
         if self.exit:
-            sys.exit(not self.result.wasSuccessful())
+            if self.result.testsRun == 0 and len(self.result.skipped) == 0:
+                sys.exit(_NO_TESTS_EXITCODE)
+            elif self.result.wasSuccessful():
+                sys.exit(0)
+            else:
+                sys.exit(1)
+
 
 main = TestProgram
diff --git a/contrib/tools/python3/src/Lib/unittest/mock.py b/contrib/tools/python3/src/Lib/unittest/mock.py
index 3c96f1e864..a2187580af 100644
--- a/contrib/tools/python3/src/Lib/unittest/mock.py
+++ b/contrib/tools/python3/src/Lib/unittest/mock.py
@@ -417,15 +417,18 @@ class NonCallableMock(Base):
     # necessary.
     _lock = RLock()
 
-    def __new__(cls, /, *args, **kw):
+    def __new__(
+            cls, spec=None, wraps=None, name=None, spec_set=None,
+            parent=None, _spec_state=None, _new_name='', _new_parent=None,
+            _spec_as_instance=False, _eat_self=None, unsafe=False, **kwargs
+        ):
         # every instance has its own class
         # so we can create magic methods on the
         # class without stomping on other mocks
         bases = (cls,)
         if not issubclass(cls, AsyncMockMixin):
             # Check if spec is an async object or function
-            bound_args = _MOCK_SIG.bind_partial(cls, *args, **kw).arguments
-            spec_arg = bound_args.get('spec_set', bound_args.get('spec'))
+            spec_arg = spec_set or spec
             if spec_arg is not None and _is_async_obj(spec_arg):
                 bases = (AsyncMockMixin, cls)
         new = type(cls.__name__, bases, {'__doc__': cls.__doc__})
@@ -511,10 +514,6 @@ class NonCallableMock(Base):
         _spec_signature = None
         _spec_asyncs = []
 
-        for attr in dir(spec):
-            if iscoroutinefunction(getattr(spec, attr, None)):
-                _spec_asyncs.append(attr)
-
         if spec is not None and not _is_list(spec):
             if isinstance(spec, type):
                 _spec_class = spec
@@ -524,7 +523,13 @@ class NonCallableMock(Base):
                                         _spec_as_instance, _eat_self)
             _spec_signature = res and res[1]
 
-            spec = dir(spec)
+            spec_list = dir(spec)
+
+            for attr in spec_list:
+                if iscoroutinefunction(getattr(spec, attr, None)):
+                    _spec_asyncs.append(attr)
+
+            spec = spec_list
 
         __dict__ = self.__dict__
         __dict__['_spec_class'] = _spec_class
@@ -654,7 +659,7 @@ class NonCallableMock(Base):
         elif _is_magic(name):
             raise AttributeError(name)
         if not self._mock_unsafe and (not self._mock_methods or name not in self._mock_methods):
-            if name.startswith(('assert', 'assret', 'asert', 'aseert', 'assrt')):
+            if name.startswith(('assert', 'assret', 'asert', 'aseert', 'assrt')) or name in _ATTRIB_DENY_LIST:
                 raise AttributeError(
                     f"{name!r} is not a valid assertion. Use a spec "
                     f"for the mock if {name!r} is meant to be an attribute.")
@@ -1063,7 +1068,12 @@ class NonCallableMock(Base):
         return f"\n{prefix}: {safe_repr(self.mock_calls)}."
 
 
-_MOCK_SIG = inspect.signature(NonCallableMock.__init__)
+# Denylist for forbidden attribute names in safe mode
+_ATTRIB_DENY_LIST = frozenset({
+    name.removeprefix("assert_")
+    for name in dir(NonCallableMock)
+    if name.startswith("assert_")
+})
 
 
 class _AnyComparer(list):
@@ -1235,9 +1245,11 @@ class Mock(CallableMixin, NonCallableMock):
       `return_value` attribute.
 
     * `unsafe`: By default, accessing any attribute whose name starts with
-      *assert*, *assret*, *asert*, *aseert* or *assrt* will raise an
-       AttributeError. Passing `unsafe=True` will allow access to
-      these attributes.
+      *assert*, *assret*, *asert*, *aseert*, or *assrt* raises an AttributeError.
+      Additionally, an AttributeError is raised when accessing
+      attributes that match the name of an assertion method without the prefix
+      `assert_`, e.g. accessing `called_once` instead of `assert_called_once`.
+      Passing `unsafe=True` will allow access to these attributes.
 
     * `wraps`: Item for the mock object to wrap. If `wraps` is not None then
       calling the Mock will pass the call through to the wrapped object
@@ -2144,10 +2156,8 @@ class NonCallableMagicMock(MagicMixin, NonCallableMock):
 
 
 class AsyncMagicMixin(MagicMixin):
-    def __init__(self, /, *args, **kw):
-        self._mock_set_magics()  # make magic work for kwargs in init
-        _safe_super(AsyncMagicMixin, self).__init__(*args, **kw)
-        self._mock_set_magics()  # fix magic broken by upper level init
+    pass
+
 
 class MagicMock(MagicMixin, Mock):
     """
@@ -2189,6 +2199,13 @@ class MagicProxy(Base):
         return self.create_mock()
 
 
+try:
+    _CODE_SIG = inspect.signature(partial(CodeType.__init__, None))
+    _CODE_ATTRS = dir(CodeType)
+except ValueError:
+    _CODE_SIG = None
+
+
 class AsyncMockMixin(Base):
     await_count = _delegating_property('await_count')
     await_args = _delegating_property('await_args')
@@ -2206,7 +2223,12 @@ class AsyncMockMixin(Base):
         self.__dict__['_mock_await_count'] = 0
         self.__dict__['_mock_await_args'] = None
         self.__dict__['_mock_await_args_list'] = _CallList()
-        code_mock = NonCallableMock(spec_set=CodeType)
+        if _CODE_SIG:
+            code_mock = NonCallableMock(spec_set=_CODE_ATTRS)
+            code_mock.__dict__["_spec_class"] = CodeType
+            code_mock.__dict__["_spec_signature"] = _CODE_SIG
+        else:
+            code_mock = NonCallableMock(spec_set=CodeType)
         code_mock.co_flags = (
             inspect.CO_COROUTINE
             + inspect.CO_VARARGS
@@ -2777,6 +2799,7 @@ def create_autospec(spec, spec_set=False, instance=False, _parent=None,
                               _new_parent=parent,
                               **kwargs)
             mock._mock_children[entry] = new
+            new.return_value = child_klass()
             _check_signature(original, new, skipfirst=skipfirst)
 
         # so functions created with _set_signature become instance attributes,
diff --git a/contrib/tools/python3/src/Lib/unittest/result.py b/contrib/tools/python3/src/Lib/unittest/result.py
index 5ca4c23238..3ace0a5b7b 100644
--- a/contrib/tools/python3/src/Lib/unittest/result.py
+++ b/contrib/tools/python3/src/Lib/unittest/result.py
@@ -43,6 +43,7 @@ class TestResult(object):
         self.skipped = []
         self.expectedFailures = []
         self.unexpectedSuccesses = []
+        self.collectedDurations = []
         self.shouldStop = False
         self.buffer = False
         self.tb_locals = False
@@ -157,6 +158,17 @@ class TestResult(object):
         """Called when a test was expected to fail, but succeed."""
         self.unexpectedSuccesses.append(test)
 
+    def addDuration(self, test, elapsed):
+        """Called when a test finished to run, regardless of its outcome.
+        *test* is the test case corresponding to the test method.
+        *elapsed* is the time represented in seconds, and it includes the
+        execution of cleanup functions.
+        """
+        # support for a TextTestRunner using an old TestResult class
+        if hasattr(self, "collectedDurations"):
+            # Pass test repr and not the test object itself to avoid resources leak
+            self.collectedDurations.append((str(test), elapsed))
+
     def wasSuccessful(self):
         """Tells whether or not this result was a success."""
         # The hasattr check is for test_result's OldResult test.  That
diff --git a/contrib/tools/python3/src/Lib/unittest/runner.py b/contrib/tools/python3/src/Lib/unittest/runner.py
index cb452c7ade..2bcadf0c99 100644
--- a/contrib/tools/python3/src/Lib/unittest/runner.py
+++ b/contrib/tools/python3/src/Lib/unittest/runner.py
@@ -35,13 +35,16 @@ class TextTestResult(result.TestResult):
     separator1 = '=' * 70
     separator2 = '-' * 70
 
-    def __init__(self, stream, descriptions, verbosity):
+    def __init__(self, stream, descriptions, verbosity, *, durations=None):
+        """Construct a TextTestResult. Subclasses should accept **kwargs
+        to ensure compatibility as the interface changes."""
         super(TextTestResult, self).__init__(stream, descriptions, verbosity)
         self.stream = stream
         self.showAll = verbosity > 1
         self.dots = verbosity == 1
         self.descriptions = descriptions
         self._newline = True
+        self.durations = durations
 
     def getDescription(self, test):
         doc_first_line = test.shortDescription()
@@ -168,7 +171,7 @@ class TextTestRunner(object):
 
     def __init__(self, stream=None, descriptions=True, verbosity=1,
                  failfast=False, buffer=False, resultclass=None, warnings=None,
-                 *, tb_locals=False):
+                 *, tb_locals=False, durations=None):
         """Construct a TextTestRunner.
 
         Subclasses should accept **kwargs to ensure compatibility as the
@@ -182,12 +185,41 @@ class TextTestRunner(object):
         self.failfast = failfast
         self.buffer = buffer
         self.tb_locals = tb_locals
+        self.durations = durations
         self.warnings = warnings
         if resultclass is not None:
             self.resultclass = resultclass
 
     def _makeResult(self):
-        return self.resultclass(self.stream, self.descriptions, self.verbosity)
+        try:
+            return self.resultclass(self.stream, self.descriptions,
+                                    self.verbosity, durations=self.durations)
+        except TypeError:
+            # didn't accept the durations argument
+            return self.resultclass(self.stream, self.descriptions,
+                                    self.verbosity)
+
+    def _printDurations(self, result):
+        if not result.collectedDurations:
+            return
+        ls = sorted(result.collectedDurations, key=lambda x: x[1],
+                    reverse=True)
+        if self.durations > 0:
+            ls = ls[:self.durations]
+        self.stream.writeln("Slowest test durations")
+        if hasattr(result, 'separator2'):
+            self.stream.writeln(result.separator2)
+        hidden = False
+        for test, elapsed in ls:
+            if self.verbosity < 2 and elapsed < 0.001:
+                hidden = True
+                continue
+            self.stream.writeln("%-10s %s" % ("%.3fs" % elapsed, test))
+        if hidden:
+            self.stream.writeln("\n(durations < 0.001s were hidden; "
+                                "use -v to show these durations)")
+        else:
+            self.stream.writeln("")
 
     def run(self, test):
         "Run the given test case or test suite."
@@ -200,15 +232,6 @@ class TextTestRunner(object):
             if self.warnings:
                 # if self.warnings is set, use it to filter all the warnings
                 warnings.simplefilter(self.warnings)
-                # if the filter is 'default' or 'always', special-case the
-                # warnings from the deprecated unittest methods to show them
-                # no more than once per module, because they can be fairly
-                # noisy.  The -Wd and -Wa flags can be used to bypass this
-                # only when self.warnings is None.
-                if self.warnings in ['default', 'always']:
-                    warnings.filterwarnings('module',
-                            category=DeprecationWarning,
-                            message=r'Please use assert\w+ instead.')
             startTime = time.perf_counter()
             startTestRun = getattr(result, 'startTestRun', None)
             if startTestRun is not None:
@@ -222,8 +245,12 @@ class TextTestRunner(object):
             stopTime = time.perf_counter()
         timeTaken = stopTime - startTime
         result.printErrors()
+        if self.durations is not None:
+            self._printDurations(result)
+
         if hasattr(result, 'separator2'):
             self.stream.writeln(result.separator2)
+
         run = result.testsRun
         self.stream.writeln("Ran %d test%s in %.3fs" %
                             (run, run != 1 and "s" or "", timeTaken))
@@ -247,6 +274,8 @@ class TextTestRunner(object):
                 infos.append("failures=%d" % failed)
             if errored:
                 infos.append("errors=%d" % errored)
+        elif run == 0 and not skipped:
+            self.stream.write("NO TESTS RAN")
         else:
             self.stream.write("OK")
         if skipped:
diff --git a/contrib/tools/python3/src/Lib/urllib/parse.py b/contrib/tools/python3/src/Lib/urllib/parse.py
index c5bbe713cc..c129b0d797 100644
--- a/contrib/tools/python3/src/Lib/urllib/parse.py
+++ b/contrib/tools/python3/src/Lib/urllib/parse.py
@@ -33,8 +33,8 @@ It serves as a useful guide when making changes.
 
 from collections import namedtuple
 import functools
+import math
 import re
-import sys
 import types
 import warnings
 import ipaddress
@@ -59,7 +59,7 @@ uses_netloc = ['', 'ftp', 'http', 'gopher', 'nntp', 'telnet',
                'imap', 'wais', 'file', 'mms', 'https', 'shttp',
                'snews', 'prospero', 'rtsp', 'rtsps', 'rtspu', 'rsync',
                'svn', 'svn+ssh', 'sftp', 'nfs', 'git', 'git+ssh',
-               'ws', 'wss']
+               'ws', 'wss', 'itms-services']
 
 uses_params = ['', 'ftp', 'hdl', 'prospero', 'http', 'imap',
                'https', 'shttp', 'rtsp', 'rtsps', 'rtspu', 'sip',
@@ -626,6 +626,9 @@ _hextobyte = None
 
 def unquote_to_bytes(string):
     """unquote_to_bytes('abc%20def') -> b'abc def'."""
+    return bytes(_unquote_impl(string))
+
+def _unquote_impl(string: bytes | bytearray | str) -> bytes | bytearray:
     # Note: strings are encoded as UTF-8. This is only an issue if it contains
     # unescaped non-ASCII characters, which URIs should not.
     if not string:
@@ -637,8 +640,8 @@ def unquote_to_bytes(string):
     bits = string.split(b'%')
     if len(bits) == 1:
         return string
-    res = [bits[0]]
-    append = res.append
+    res = bytearray(bits[0])
+    append = res.extend
     # Delay the initialization of the table to not waste memory
     # if the function is never called
     global _hextobyte
@@ -652,10 +655,20 @@ def unquote_to_bytes(string):
         except KeyError:
             append(b'%')
             append(item)
-    return b''.join(res)
+    return res
 
 _asciire = re.compile('([\x00-\x7f]+)')
 
+def _generate_unquoted_parts(string, encoding, errors):
+    previous_match_end = 0
+    for ascii_match in _asciire.finditer(string):
+        start, end = ascii_match.span()
+        yield string[previous_match_end:start]  # Non-ASCII
+        # The ascii_match[1] group == string[start:end].
+        yield _unquote_impl(ascii_match[1]).decode(encoding, errors)
+        previous_match_end = end
+    yield string[previous_match_end:]  # Non-ASCII tail
+
 def unquote(string, encoding='utf-8', errors='replace'):
     """Replace %xx escapes by their single-character equivalent. The optional
     encoding and errors parameters specify how to decode percent-encoded
@@ -667,21 +680,16 @@ def unquote(string, encoding='utf-8', errors='replace'):
     unquote('abc%20def') -> 'abc def'.
     """
     if isinstance(string, bytes):
-        return unquote_to_bytes(string).decode(encoding, errors)
+        return _unquote_impl(string).decode(encoding, errors)
     if '%' not in string:
+        # Is it a string-like object?
         string.split
         return string
     if encoding is None:
         encoding = 'utf-8'
     if errors is None:
         errors = 'replace'
-    bits = _asciire.split(string)
-    res = [bits[0]]
-    append = res.append
-    for i in range(1, len(bits), 2):
-        append(unquote_to_bytes(bits[i]).decode(encoding, errors))
-        append(bits[i + 1])
-    return ''.join(res)
+    return ''.join(_generate_unquoted_parts(string, encoding, errors))
 
 
 def parse_qs(qs, keep_blank_values=False, strict_parsing=False,
@@ -932,7 +940,14 @@ def quote_from_bytes(bs, safe='/'):
     if not bs.rstrip(_ALWAYS_SAFE_BYTES + safe):
         return bs.decode()
     quoter = _byte_quoter_factory(safe)
-    return ''.join([quoter(char) for char in bs])
+    if (bs_len := len(bs)) < 200_000:
+        return ''.join(map(quoter, bs))
+    else:
+        # This saves memory - https://github.com/python/cpython/issues/95865
+        chunk_size = math.isqrt(bs_len)
+        chunks = [''.join(map(quoter, bs[i:i+chunk_size]))
+                  for i in range(0, bs_len, chunk_size)]
+        return ''.join(chunks)
 
 def urlencode(query, doseq=False, safe='', encoding=None, errors=None,
               quote_via=quote_plus):
diff --git a/contrib/tools/python3/src/Lib/urllib/request.py b/contrib/tools/python3/src/Lib/urllib/request.py
index 24911bb019..5314b3f260 100644
--- a/contrib/tools/python3/src/Lib/urllib/request.py
+++ b/contrib/tools/python3/src/Lib/urllib/request.py
@@ -88,7 +88,6 @@ import hashlib
 import http.client
 import io
 import os
-import posixpath
 import re
 import socket
 import string
@@ -266,10 +265,7 @@ def urlretrieve(url, filename=None, reporthook=None, data=None):
             if reporthook:
                 reporthook(blocknum, bs, size)
 
-            while True:
-                block = fp.read(bs)
-                if not block:
-                    break
+            while block := fp.read(bs):
                 read += len(block)
                 tfp.write(block)
                 blocknum += 1
@@ -1255,8 +1251,8 @@ class ProxyDigestAuthHandler(BaseHandler, AbstractDigestAuthHandler):
 
 class AbstractHTTPHandler(BaseHandler):
 
-    def __init__(self, debuglevel=0):
-        self._debuglevel = debuglevel
+    def __init__(self, debuglevel=None):
+        self._debuglevel = debuglevel if debuglevel is not None else http.client.HTTPConnection.debuglevel
 
     def set_http_debuglevel(self, level):
         self._debuglevel = level
@@ -1382,14 +1378,19 @@ if hasattr(http.client, 'HTTPSConnection'):
 
     class HTTPSHandler(AbstractHTTPHandler):
 
-        def __init__(self, debuglevel=0, context=None, check_hostname=None):
+        def __init__(self, debuglevel=None, context=None, check_hostname=None):
+            debuglevel = debuglevel if debuglevel is not None else http.client.HTTPSConnection.debuglevel
             AbstractHTTPHandler.__init__(self, debuglevel)
+            if context is None:
+                http_version = http.client.HTTPSConnection._http_vsn
+                context = http.client._create_https_context(http_version)
+            if check_hostname is not None:
+                context.check_hostname = check_hostname
             self._context = context
-            self._check_hostname = check_hostname
 
         def https_open(self, req):
             return self.do_open(http.client.HTTPSConnection, req,
-                context=self._context, check_hostname=self._check_hostname)
+                                context=self._context)
 
         https_request = AbstractHTTPHandler.do_request_
 
@@ -1844,10 +1845,7 @@ class URLopener:
                     size = int(headers["Content-Length"])
                 if reporthook:
                     reporthook(blocknum, bs, size)
-                while 1:
-                    block = fp.read(bs)
-                    if not block:
-                        break
+                while block := fp.read(bs):
                     read += len(block)
                     tfp.write(block)
                     blocknum += 1
@@ -1987,9 +1985,17 @@ class URLopener:
 
     if _have_ssl:
         def _https_connection(self, host):
-            return http.client.HTTPSConnection(host,
-                                           key_file=self.key_file,
-                                           cert_file=self.cert_file)
+            if self.key_file or self.cert_file:
+                http_version = http.client.HTTPSConnection._http_vsn
+                context = http.client._create_https_context(http_version)
+                context.load_cert_chain(self.cert_file, self.key_file)
+                # cert and key file means the user wants to authenticate.
+                # enable TLS 1.3 PHA implicitly even for custom contexts.
+                if context.post_handshake_auth is not None:
+                    context.post_handshake_auth = True
+            else:
+                context = None
+            return http.client.HTTPSConnection(host, context=context)
 
         def open_https(self, url, data=None):
             """Use HTTPS protocol."""
@@ -2503,28 +2509,34 @@ def getproxies_environment():
     this seems to be the standard convention.  If you need a
     different way, you can pass a proxies dictionary to the
     [Fancy]URLopener constructor.
-
     """
-    proxies = {}
     # in order to prefer lowercase variables, process environment in
     # two passes: first matches any, second pass matches lowercase only
-    for name, value in os.environ.items():
-        name = name.lower()
-        if value and name[-6:] == '_proxy':
-            proxies[name[:-6]] = value
+
+    # select only environment variables which end in (after making lowercase) _proxy
+    proxies = {}
+    environment = []
+    for name in os.environ.keys():
+        # fast screen underscore position before more expensive case-folding
+        if len(name) > 5 and name[-6] == "_" and name[-5:].lower() == "proxy":
+            value = os.environ[name]
+            proxy_name = name[:-6].lower()
+            environment.append((name, value, proxy_name))
+            if value:
+                proxies[proxy_name] = value
     # CVE-2016-1000110 - If we are running as CGI script, forget HTTP_PROXY
     # (non-all-lowercase) as it may be set from the web server by a "Proxy:"
     # header from the client
     # If "proxy" is lowercase, it will still be used thanks to the next block
     if 'REQUEST_METHOD' in os.environ:
         proxies.pop('http', None)
-    for name, value in os.environ.items():
+    for name, value, proxy_name in environment:
+        # not case-folded, checking here for lower-case env vars only
         if name[-6:] == '_proxy':
-            name = name.lower()
             if value:
-                proxies[name[:-6]] = value
+                proxies[proxy_name] = value
             else:
-                proxies.pop(name[:-6], None)
+                proxies.pop(proxy_name, None)
     return proxies
 
 def proxy_bypass_environment(host, proxies=None):
diff --git a/contrib/tools/python3/src/Lib/uuid.py b/contrib/tools/python3/src/Lib/uuid.py
index e863b63187..470bc0d685 100644
--- a/contrib/tools/python3/src/Lib/uuid.py
+++ b/contrib/tools/python3/src/Lib/uuid.py
@@ -53,7 +53,7 @@ from enum import Enum, _simple_enum
 __author__ = 'Ka-Ping Yee <ping@zesty.ca>'
 
 # The recognized platforms - known behaviors
-if sys.platform in ('win32', 'darwin'):
+if sys.platform in ('win32', 'darwin', 'emscripten', 'wasi'):
     _AIX = _LINUX = False
 else:
     import platform
@@ -401,7 +401,7 @@ def _get_command_stdout(command, *args):
 # over locally administered ones since the former are globally unique, but
 # we'll return the first of the latter found if that's all the machine has.
 #
-# See https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local
+# See https://en.wikipedia.org/wiki/MAC_address#Universal_vs._local_(U/L_bit)
 
 def _is_universal(mac):
     return not (mac & (1 << 41))
@@ -615,7 +615,7 @@ def _random_getnode():
     # significant bit of the first octet".  This works out to be the 41st bit
     # counting from 1 being the least significant bit, or 1<<40.
     #
-    # See https://en.wikipedia.org/wiki/MAC_address#Unicast_vs._multicast
+    # See https://en.wikipedia.org/w/index.php?title=MAC_address&oldid=1128764812#Universal_vs._local_(U/L_bit)
     import random
     return random.getrandbits(48) | (1 << 40)
 
@@ -711,9 +711,11 @@ def uuid1(node=None, clock_seq=None):
 
 def uuid3(namespace, name):
     """Generate a UUID from the MD5 hash of a namespace UUID and a name."""
+    if isinstance(name, str):
+        name = bytes(name, "utf-8")
     from hashlib import md5
     digest = md5(
-        namespace.bytes + bytes(name, "utf-8"),
+        namespace.bytes + name,
         usedforsecurity=False
     ).digest()
     return UUID(bytes=digest[:16], version=3)
@@ -724,13 +726,68 @@ def uuid4():
 
 def uuid5(namespace, name):
     """Generate a UUID from the SHA-1 hash of a namespace UUID and a name."""
+    if isinstance(name, str):
+        name = bytes(name, "utf-8")
     from hashlib import sha1
-    hash = sha1(namespace.bytes + bytes(name, "utf-8")).digest()
+    hash = sha1(namespace.bytes + name).digest()
     return UUID(bytes=hash[:16], version=5)
 
+
+def main():
+    """Run the uuid command line interface."""
+    uuid_funcs = {
+        "uuid1": uuid1,
+        "uuid3": uuid3,
+        "uuid4": uuid4,
+        "uuid5": uuid5
+    }
+    uuid_namespace_funcs = ("uuid3", "uuid5")
+    namespaces = {
+        "@dns": NAMESPACE_DNS,
+        "@url": NAMESPACE_URL,
+        "@oid": NAMESPACE_OID,
+        "@x500": NAMESPACE_X500
+    }
+
+    import argparse
+    parser = argparse.ArgumentParser(
+        description="Generates a uuid using the selected uuid function.")
+    parser.add_argument("-u", "--uuid", choices=uuid_funcs.keys(), default="uuid4",
+                        help="The function to use to generate the uuid. "
+                        "By default uuid4 function is used.")
+    parser.add_argument("-n", "--namespace",
+                        help="The namespace is a UUID, or '@ns' where 'ns' is a "
+                        "well-known predefined UUID addressed by namespace name. "
+                        "Such as @dns, @url, @oid, and @x500. "
+                        "Only required for uuid3/uuid5 functions.")
+    parser.add_argument("-N", "--name",
+                        help="The name used as part of generating the uuid. "
+                        "Only required for uuid3/uuid5 functions.")
+
+    args = parser.parse_args()
+    uuid_func = uuid_funcs[args.uuid]
+    namespace = args.namespace
+    name = args.name
+
+    if args.uuid in uuid_namespace_funcs:
+        if not namespace or not name:
+            parser.error(
+                "Incorrect number of arguments. "
+                f"{args.uuid} requires a namespace and a name. "
+                "Run 'python -m uuid -h' for more information."
+            )
+        namespace = namespaces[namespace] if namespace in namespaces else UUID(namespace)
+        print(uuid_func(namespace, name))
+    else:
+        print(uuid_func())
+
+
 # The following standard UUIDs are for use with uuid3() or uuid5().
 
 NAMESPACE_DNS = UUID('6ba7b810-9dad-11d1-80b4-00c04fd430c8')
 NAMESPACE_URL = UUID('6ba7b811-9dad-11d1-80b4-00c04fd430c8')
 NAMESPACE_OID = UUID('6ba7b812-9dad-11d1-80b4-00c04fd430c8')
 NAMESPACE_X500 = UUID('6ba7b814-9dad-11d1-80b4-00c04fd430c8')
+
+if __name__ == "__main__":
+    main()
diff --git a/contrib/tools/python3/src/Lib/venv/__init__.py b/contrib/tools/python3/src/Lib/venv/__init__.py
index 6bce308108..2173c9b13e 100644
--- a/contrib/tools/python3/src/Lib/venv/__init__.py
+++ b/contrib/tools/python3/src/Lib/venv/__init__.py
@@ -13,7 +13,7 @@ import sysconfig
 import types
 
 
-CORE_VENV_DEPS = ('pip', 'setuptools')
+CORE_VENV_DEPS = ('pip',)
 logger = logging.getLogger(__name__)
 
 
@@ -143,6 +143,7 @@ class EnvBuilder:
 
         context.inc_path = incpath
         create_if_needed(incpath)
+        context.lib_path = libpath
         create_if_needed(libpath)
         # Issue 21197: create lib64 as a symlink to lib on 64-bit non-OS X POSIX
         if ((sys.maxsize > 2**32) and (os.name == 'posix') and
@@ -222,7 +223,7 @@ class EnvBuilder:
             force_copy = not self.symlinks
             if not force_copy:
                 try:
-                    if not os.path.islink(dst): # can't link to itself!
+                    if not os.path.islink(dst):  # can't link to itself!
                         if relative_symlinks_ok:
                             assert os.path.dirname(src) == os.path.dirname(dst)
                             os.symlink(os.path.basename(src), dst)
@@ -417,11 +418,11 @@ class EnvBuilder:
         binpath = context.bin_path
         plen = len(path)
         for root, dirs, files in os.walk(path):
-            if root == path: # at top-level, remove irrelevant dirs
+            if root == path:  # at top-level, remove irrelevant dirs
                 for d in dirs[:]:
                     if d not in ('common', os.name):
                         dirs.remove(d)
-                continue # ignore files in top level
+                continue  # ignore files in top level
             for f in files:
                 if (os.name == 'nt' and f.startswith('python')
                         and f.endswith(('.exe', '.pdb'))):
@@ -467,83 +468,76 @@ def create(env_dir, system_site_packages=False, clear=False,
                          prompt=prompt, upgrade_deps=upgrade_deps)
     builder.create(env_dir)
 
+
 def main(args=None):
-    compatible = True
-    if sys.version_info < (3, 3):
-        compatible = False
-    elif not hasattr(sys, 'base_prefix'):
-        compatible = False
-    if not compatible:
-        raise ValueError('This script is only for use with Python >= 3.3')
+    import argparse
+
+    parser = argparse.ArgumentParser(prog=__name__,
+                                     description='Creates virtual Python '
+                                                 'environments in one or '
+                                                 'more target '
+                                                 'directories.',
+                                     epilog='Once an environment has been '
+                                            'created, you may wish to '
+                                            'activate it, e.g. by '
+                                            'sourcing an activate script '
+                                            'in its bin directory.')
+    parser.add_argument('dirs', metavar='ENV_DIR', nargs='+',
+                        help='A directory to create the environment in.')
+    parser.add_argument('--system-site-packages', default=False,
+                        action='store_true', dest='system_site',
+                        help='Give the virtual environment access to the '
+                             'system site-packages dir.')
+    if os.name == 'nt':
+        use_symlinks = False
     else:
-        import argparse
-
-        parser = argparse.ArgumentParser(prog=__name__,
-                                         description='Creates virtual Python '
-                                                     'environments in one or '
-                                                     'more target '
-                                                     'directories.',
-                                         epilog='Once an environment has been '
-                                                'created, you may wish to '
-                                                'activate it, e.g. by '
-                                                'sourcing an activate script '
-                                                'in its bin directory.')
-        parser.add_argument('dirs', metavar='ENV_DIR', nargs='+',
-                            help='A directory to create the environment in.')
-        parser.add_argument('--system-site-packages', default=False,
-                            action='store_true', dest='system_site',
-                            help='Give the virtual environment access to the '
-                                 'system site-packages dir.')
-        if os.name == 'nt':
-            use_symlinks = False
-        else:
-            use_symlinks = True
-        group = parser.add_mutually_exclusive_group()
-        group.add_argument('--symlinks', default=use_symlinks,
-                           action='store_true', dest='symlinks',
-                           help='Try to use symlinks rather than copies, '
-                                'when symlinks are not the default for '
-                                'the platform.')
-        group.add_argument('--copies', default=not use_symlinks,
-                           action='store_false', dest='symlinks',
-                           help='Try to use copies rather than symlinks, '
-                                'even when symlinks are the default for '
-                                'the platform.')
-        parser.add_argument('--clear', default=False, action='store_true',
-                            dest='clear', help='Delete the contents of the '
-                                               'environment directory if it '
-                                               'already exists, before '
-                                               'environment creation.')
-        parser.add_argument('--upgrade', default=False, action='store_true',
-                            dest='upgrade', help='Upgrade the environment '
-                                               'directory to use this version '
-                                               'of Python, assuming Python '
-                                               'has been upgraded in-place.')
-        parser.add_argument('--without-pip', dest='with_pip',
-                            default=True, action='store_false',
-                            help='Skips installing or upgrading pip in the '
-                                 'virtual environment (pip is bootstrapped '
-                                 'by default)')
-        parser.add_argument('--prompt',
-                            help='Provides an alternative prompt prefix for '
-                                 'this environment.')
-        parser.add_argument('--upgrade-deps', default=False, action='store_true',
-                            dest='upgrade_deps',
-                            help='Upgrade core dependencies: {} to the latest '
-                                 'version in PyPI'.format(
-                                 ' '.join(CORE_VENV_DEPS)))
-        options = parser.parse_args(args)
-        if options.upgrade and options.clear:
-            raise ValueError('you cannot supply --upgrade and --clear together.')
-        builder = EnvBuilder(system_site_packages=options.system_site,
-                             clear=options.clear,
-                             symlinks=options.symlinks,
-                             upgrade=options.upgrade,
-                             with_pip=options.with_pip,
-                             prompt=options.prompt,
-                             upgrade_deps=options.upgrade_deps)
-        for d in options.dirs:
-            builder.create(d)
+        use_symlinks = True
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument('--symlinks', default=use_symlinks,
+                       action='store_true', dest='symlinks',
+                       help='Try to use symlinks rather than copies, '
+                            'when symlinks are not the default for '
+                            'the platform.')
+    group.add_argument('--copies', default=not use_symlinks,
+                       action='store_false', dest='symlinks',
+                       help='Try to use copies rather than symlinks, '
+                            'even when symlinks are the default for '
+                            'the platform.')
+    parser.add_argument('--clear', default=False, action='store_true',
+                        dest='clear', help='Delete the contents of the '
+                                           'environment directory if it '
+                                           'already exists, before '
+                                           'environment creation.')
+    parser.add_argument('--upgrade', default=False, action='store_true',
+                        dest='upgrade', help='Upgrade the environment '
+                                             'directory to use this version '
+                                             'of Python, assuming Python '
+                                             'has been upgraded in-place.')
+    parser.add_argument('--without-pip', dest='with_pip',
+                        default=True, action='store_false',
+                        help='Skips installing or upgrading pip in the '
+                             'virtual environment (pip is bootstrapped '
+                             'by default)')
+    parser.add_argument('--prompt',
+                        help='Provides an alternative prompt prefix for '
+                             'this environment.')
+    parser.add_argument('--upgrade-deps', default=False, action='store_true',
+                        dest='upgrade_deps',
+                        help=f'Upgrade core dependencies ({", ".join(CORE_VENV_DEPS)}) '
+                             'to the latest version in PyPI')
+    options = parser.parse_args(args)
+    if options.upgrade and options.clear:
+        raise ValueError('you cannot supply --upgrade and --clear together.')
+    builder = EnvBuilder(system_site_packages=options.system_site,
+                         clear=options.clear,
+                         symlinks=options.symlinks,
+                         upgrade=options.upgrade,
+                         with_pip=options.with_pip,
+                         prompt=options.prompt,
+                         upgrade_deps=options.upgrade_deps)
+    for d in options.dirs:
+        builder.create(d)
+
 
 if __name__ == '__main__':
     rc = 1
diff --git a/contrib/tools/python3/src/Lib/warnings.py b/contrib/tools/python3/src/Lib/warnings.py
index 7c8a0943b8..391a501f72 100644
--- a/contrib/tools/python3/src/Lib/warnings.py
+++ b/contrib/tools/python3/src/Lib/warnings.py
@@ -270,22 +270,32 @@ def _getcategory(category):
     return cat
 
 
+def _is_internal_filename(filename):
+    return 'importlib' in filename and '_bootstrap' in filename
+
+
+def _is_filename_to_skip(filename, skip_file_prefixes):
+    return any(filename.startswith(prefix) for prefix in skip_file_prefixes)
+
+
 def _is_internal_frame(frame):
     """Signal whether the frame is an internal CPython implementation detail."""
-    filename = frame.f_code.co_filename
-    return 'importlib' in filename and '_bootstrap' in filename
+    return _is_internal_filename(frame.f_code.co_filename)
 
 
-def _next_external_frame(frame):
-    """Find the next frame that doesn't involve CPython internals."""
+def _next_external_frame(frame, skip_file_prefixes):
+    """Find the next frame that doesn't involve Python or user internals."""
     frame = frame.f_back
-    while frame is not None and _is_internal_frame(frame):
+    while frame is not None and (
+            _is_internal_filename(filename := frame.f_code.co_filename) or
+            _is_filename_to_skip(filename, skip_file_prefixes)):
         frame = frame.f_back
     return frame
 
 
 # Code typically replaced by _warnings
-def warn(message, category=None, stacklevel=1, source=None):
+def warn(message, category=None, stacklevel=1, source=None,
+         *, skip_file_prefixes=()):
     """Issue a warning, or maybe ignore it or raise an exception."""
     # Check if message is already a Warning object
     if isinstance(message, Warning):
@@ -296,6 +306,11 @@ def warn(message, category=None, stacklevel=1, source=None):
     if not (isinstance(category, type) and issubclass(category, Warning)):
         raise TypeError("category must be a Warning subclass, "
                         "not '{:s}'".format(type(category).__name__))
+    if not isinstance(skip_file_prefixes, tuple):
+        # The C version demands a tuple for implementation performance.
+        raise TypeError('skip_file_prefixes must be a tuple of strs.')
+    if skip_file_prefixes:
+        stacklevel = max(2, stacklevel)
     # Get context information
     try:
         if stacklevel <= 1 or _is_internal_frame(sys._getframe(1)):
@@ -306,7 +321,7 @@ def warn(message, category=None, stacklevel=1, source=None):
             frame = sys._getframe(1)
             # Look for one frame less since the above line starts us off.
             for x in range(stacklevel-1):
-                frame = _next_external_frame(frame)
+                frame = _next_external_frame(frame, skip_file_prefixes)
                 if frame is None:
                     raise ValueError
     except ValueError:
diff --git a/contrib/tools/python3/src/Lib/wave.py b/contrib/tools/python3/src/Lib/wave.py
index bcacbac4e7..4b0c683f6b 100644
--- a/contrib/tools/python3/src/Lib/wave.py
+++ b/contrib/tools/python3/src/Lib/wave.py
@@ -83,6 +83,9 @@ class Error(Exception):
     pass
 
 WAVE_FORMAT_PCM = 0x0001
+WAVE_FORMAT_EXTENSIBLE = 0xFFFE
+# Derived from uuid.UUID("00000001-0000-0010-8000-00aa00389b71").bytes_le
+KSDATAFORMAT_SUBTYPE_PCM = b'\x01\x00\x00\x00\x00\x00\x10\x00\x80\x00\x00\xaa\x008\x9bq'
 
 _array_fmts = None, 'b', 'h', None, 'i'
 
@@ -376,16 +379,31 @@ class Wave_read:
             wFormatTag, self._nchannels, self._framerate, dwAvgBytesPerSec, wBlockAlign = struct.unpack_from('<HHLLH', chunk.read(14))
         except struct.error:
             raise EOFError from None
-        if wFormatTag == WAVE_FORMAT_PCM:
+        if wFormatTag != WAVE_FORMAT_PCM and wFormatTag != WAVE_FORMAT_EXTENSIBLE:
+            raise Error('unknown format: %r' % (wFormatTag,))
+        try:
+            sampwidth = struct.unpack_from('<H', chunk.read(2))[0]
+        except struct.error:
+            raise EOFError from None
+        if wFormatTag == WAVE_FORMAT_EXTENSIBLE:
             try:
-                sampwidth = struct.unpack_from('<H', chunk.read(2))[0]
+                cbSize, wValidBitsPerSample, dwChannelMask = struct.unpack_from('<HHL', chunk.read(8))
+                # Read the entire UUID from the chunk
+                SubFormat = chunk.read(16)
+                if len(SubFormat) < 16:
+                    raise EOFError
             except struct.error:
                 raise EOFError from None
-            self._sampwidth = (sampwidth + 7) // 8
-            if not self._sampwidth:
-                raise Error('bad sample width')
-        else:
-            raise Error('unknown format: %r' % (wFormatTag,))
+            if SubFormat != KSDATAFORMAT_SUBTYPE_PCM:
+                try:
+                    import uuid
+                    subformat_msg = f'unknown extended format: {uuid.UUID(bytes_le=SubFormat)}'
+                except Exception:
+                    subformat_msg = 'unknown extended format'
+                raise Error(subformat_msg)
+        self._sampwidth = (sampwidth + 7) // 8
+        if not self._sampwidth:
+            raise Error('bad sample width')
         if not self._nchannels:
             raise Error('bad # of channels')
         self._framesize = self._nchannels * self._sampwidth
diff --git a/contrib/tools/python3/src/Lib/webbrowser.py b/contrib/tools/python3/src/Lib/webbrowser.py
index 5d72524c08..ba6711e4ef 100755
--- a/contrib/tools/python3/src/Lib/webbrowser.py
+++ b/contrib/tools/python3/src/Lib/webbrowser.py
@@ -292,19 +292,8 @@ class Mozilla(UnixBrowser):
     background = True
 
 
-class Netscape(UnixBrowser):
-    """Launcher class for Netscape browser."""
-
-    raise_opts = ["-noraise", "-raise"]
-    remote_args = ['-remote', 'openURL(%s%action)']
-    remote_action = ""
-    remote_action_newwin = ",new-window"
-    remote_action_newtab = ",new-tab"
-    background = True
-
-
-class Galeon(UnixBrowser):
-    """Launcher class for Galeon/Epiphany browsers."""
+class Epiphany(UnixBrowser):
+    """Launcher class for Epiphany browser."""
 
     raise_opts = ["-noraise", ""]
     remote_args = ['%action', '%s']
@@ -402,51 +391,14 @@ class Konqueror(BaseBrowser):
             return (p.poll() is None)
 
 
-class Grail(BaseBrowser):
-    # There should be a way to maintain a connection to Grail, but the
-    # Grail remote control protocol doesn't really allow that at this
-    # point.  It probably never will!
-    def _find_grail_rc(self):
-        import glob
-        import pwd
-        import socket
-        import tempfile
-        tempdir = os.path.join(tempfile.gettempdir(),
-                               ".grail-unix")
-        user = pwd.getpwuid(os.getuid())[0]
-        filename = os.path.join(glob.escape(tempdir), glob.escape(user) + "-*")
-        maybes = glob.glob(filename)
-        if not maybes:
-            return None
-        s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-        for fn in maybes:
-            # need to PING each one until we find one that's live
-            try:
-                s.connect(fn)
-            except OSError:
-                # no good; attempt to clean it out, but don't fail:
-                try:
-                    os.unlink(fn)
-                except OSError:
-                    pass
-            else:
-                return s
-
-    def _remote(self, action):
-        s = self._find_grail_rc()
-        if not s:
-            return 0
-        s.send(action)
-        s.close()
-        return 1
+class Edge(UnixBrowser):
+    "Launcher class for Microsoft Edge browser."
 
-    def open(self, url, new=0, autoraise=True):
-        sys.audit("webbrowser.open", url)
-        if new:
-            ok = self._remote("LOADNEW " + url)
-        else:
-            ok = self._remote("LOAD " + url)
-        return ok
+    remote_args = ['%action', '%s']
+    remote_action = ""
+    remote_action_newwin = "--new-window"
+    remote_action_newtab = ""
+    background = True
 
 
 #
@@ -475,35 +427,25 @@ def register_X_browsers():
     if "KDE_FULL_SESSION" in os.environ and shutil.which("kfmclient"):
         register("kfmclient", Konqueror, Konqueror("kfmclient"))
 
+    # Common symbolic link for the default X11 browser
     if shutil.which("x-www-browser"):
         register("x-www-browser", None, BackgroundBrowser("x-www-browser"))
 
     # The Mozilla browsers
-    for browser in ("firefox", "iceweasel", "iceape", "seamonkey"):
+    for browser in ("firefox", "iceweasel", "seamonkey", "mozilla-firefox",
+                    "mozilla"):
         if shutil.which(browser):
             register(browser, None, Mozilla(browser))
 
-    # The Netscape and old Mozilla browsers
-    for browser in ("mozilla-firefox",
-                    "mozilla-firebird", "firebird",
-                    "mozilla", "netscape"):
-        if shutil.which(browser):
-            register(browser, None, Netscape(browser))
-
     # Konqueror/kfm, the KDE browser.
     if shutil.which("kfm"):
         register("kfm", Konqueror, Konqueror("kfm"))
     elif shutil.which("konqueror"):
         register("konqueror", Konqueror, Konqueror("konqueror"))
 
-    # Gnome's Galeon and Epiphany
-    for browser in ("galeon", "epiphany"):
-        if shutil.which(browser):
-            register(browser, None, Galeon(browser))
-
-    # Skipstone, another Gtk/Mozilla based browser
-    if shutil.which("skipstone"):
-        register("skipstone", None, BackgroundBrowser("skipstone"))
+    # Gnome's Epiphany
+    if shutil.which("epiphany"):
+        register("epiphany", None, Epiphany("epiphany"))
 
     # Google Chrome/Chromium browsers
     for browser in ("google-chrome", "chrome", "chromium", "chromium-browser"):
@@ -514,13 +456,10 @@ def register_X_browsers():
     if shutil.which("opera"):
         register("opera", None, Opera("opera"))
 
-    # Next, Mosaic -- old but still in use.
-    if shutil.which("mosaic"):
-        register("mosaic", None, BackgroundBrowser("mosaic"))
 
-    # Grail, the Python browser. Does anybody still use it?
-    if shutil.which("grail"):
-        register("grail", Grail, None)
+    if shutil.which("microsoft-edge"):
+        register("microsoft-edge", None, Edge("microsoft-edge"))
+
 
 def register_standard_browsers():
     global _tryorder
@@ -542,13 +481,19 @@ def register_standard_browsers():
         # First try to use the default Windows browser
         register("windows-default", WindowsDefault)
 
-        # Detect some common Windows browsers, fallback to IE
-        iexplore = os.path.join(os.environ.get("PROGRAMFILES", "C:\\Program Files"),
-                                "Internet Explorer\\IEXPLORE.EXE")
-        for browser in ("firefox", "firebird", "seamonkey", "mozilla",
-                        "netscape", "opera", iexplore):
+        # Detect some common Windows browsers, fallback to Microsoft Edge
+        # location in 64-bit Windows
+        edge64 = os.path.join(os.environ.get("PROGRAMFILES(x86)", "C:\\Program Files (x86)"),
+                              "Microsoft\\Edge\\Application\\msedge.exe")
+        # location in 32-bit Windows
+        edge32 = os.path.join(os.environ.get("PROGRAMFILES", "C:\\Program Files"),
+                              "Microsoft\\Edge\\Application\\msedge.exe")
+        for browser in ("firefox", "seamonkey", "mozilla", "chrome",
+                        "opera", edge64, edge32):
             if shutil.which(browser):
                 register(browser, None, BackgroundBrowser(browser))
+        if shutil.which("MicrosoftEdge.exe"):
+            register("microsoft-edge", None, Edge("MicrosoftEdge.exe"))
     else:
         # Prefer X browsers if present
         if os.environ.get("DISPLAY") or os.environ.get("WAYLAND_DISPLAY"):
@@ -566,14 +511,15 @@ def register_standard_browsers():
 
         # Also try console browsers
         if os.environ.get("TERM"):
+            # Common symbolic link for the default text-based browser
             if shutil.which("www-browser"):
                 register("www-browser", None, GenericBrowser("www-browser"))
-            # The Links/elinks browsers <http://artax.karlin.mff.cuni.cz/~mikulas/links/>
+            # The Links/elinks browsers <http://links.twibright.com/>
             if shutil.which("links"):
                 register("links", None, GenericBrowser("links"))
             if shutil.which("elinks"):
                 register("elinks", None, Elinks("elinks"))
-            # The Lynx browser <http://lynx.isc.org/>, <http://lynx.browser.org/>
+            # The Lynx browser <https://lynx.invisible-island.net/>, <http://lynx.browser.org/>
             if shutil.which("lynx"):
                 register("lynx", None, GenericBrowser("lynx"))
             # The w3m browser <http://w3m.sourceforge.net/>
@@ -710,11 +656,12 @@ if sys.platform == 'darwin':
 
 def main():
     import getopt
-    usage = """Usage: %s [-n | -t] url
+    usage = """Usage: %s [-n | -t | -h] url
     -n: open new window
-    -t: open new tab""" % sys.argv[0]
+    -t: open new tab
+    -h, --help: show help""" % sys.argv[0]
     try:
-        opts, args = getopt.getopt(sys.argv[1:], 'ntd')
+        opts, args = getopt.getopt(sys.argv[1:], 'ntdh',['help'])
     except getopt.error as msg:
         print(msg, file=sys.stderr)
         print(usage, file=sys.stderr)
@@ -723,6 +670,9 @@ def main():
     for o, a in opts:
         if o == '-n': new_win = 1
         elif o == '-t': new_win = 2
+        elif o == '-h' or o == '--help':
+            print(usage, file=sys.stderr)
+            sys.exit()
     if len(args) != 1:
         print(usage, file=sys.stderr)
         sys.exit(1)
diff --git a/contrib/tools/python3/src/Lib/wsgiref/handlers.py b/contrib/tools/python3/src/Lib/wsgiref/handlers.py
index 6623b70053..cafe872c7a 100644
--- a/contrib/tools/python3/src/Lib/wsgiref/handlers.py
+++ b/contrib/tools/python3/src/Lib/wsgiref/handlers.py
@@ -237,9 +237,7 @@ class BaseHandler:
         self.status = status
         self.headers = self.headers_class(headers)
         status = self._convert_string_type(status, "Status")
-        assert len(status)>=4,"Status must be at least 4 characters"
-        assert status[:3].isdigit(), "Status message must begin w/3-digit code"
-        assert status[3]==" ", "Status message must have a space after code"
+        self._validate_status(status)
 
         if __debug__:
             for name, val in headers:
@@ -250,6 +248,14 @@ class BaseHandler:
 
         return self.write
 
+    def _validate_status(self, status):
+        if len(status) < 4:
+            raise AssertionError("Status must be at least 4 characters")
+        if not status[:3].isdigit():
+            raise AssertionError("Status message must begin w/3-digit code")
+        if status[3] != " ":
+            raise AssertionError("Status message must have a space after code")
+
     def _convert_string_type(self, value, title):
         """Convert/check value type."""
         if type(value) is str:
@@ -469,10 +475,7 @@ class SimpleHandler(BaseHandler):
         from warnings import warn
         warn("SimpleHandler.stdout.write() should not do partial writes",
             DeprecationWarning)
-        while True:
-            data = data[result:]
-            if not data:
-                break
+        while data := data[result:]:
             result = self.stdout.write(data)
 
     def _flush(self):
diff --git a/contrib/tools/python3/src/Lib/wsgiref/validate.py b/contrib/tools/python3/src/Lib/wsgiref/validate.py
index 6044e320a4..1a1853cd63 100644
--- a/contrib/tools/python3/src/Lib/wsgiref/validate.py
+++ b/contrib/tools/python3/src/Lib/wsgiref/validate.py
@@ -214,10 +214,7 @@ class InputWrapper:
         return lines
 
     def __iter__(self):
-        while 1:
-            line = self.readline()
-            if not line:
-                return
+        while line := self.readline():
             yield line
 
     def close(self):
diff --git a/contrib/tools/python3/src/Lib/xdrlib.py b/contrib/tools/python3/src/Lib/xdrlib.py
index b56ffa59b7..f8c2c18228 100644
--- a/contrib/tools/python3/src/Lib/xdrlib.py
+++ b/contrib/tools/python3/src/Lib/xdrlib.py
@@ -224,9 +224,7 @@ class Unpacker:
 
     def unpack_list(self, unpack_item):
         list = []
-        while 1:
-            x = self.unpack_uint()
-            if x == 0: break
+        while (x := self.unpack_uint()) != 0:
             if x != 1:
                 raise ConversionError('0 or 1 expected, got %r' % (x,))
             item = unpack_item()
diff --git a/contrib/tools/python3/src/Lib/xml/dom/expatbuilder.py b/contrib/tools/python3/src/Lib/xml/dom/expatbuilder.py
index 199c22d0af..7dd667bf3f 100644
--- a/contrib/tools/python3/src/Lib/xml/dom/expatbuilder.py
+++ b/contrib/tools/python3/src/Lib/xml/dom/expatbuilder.py
@@ -200,10 +200,7 @@ class ExpatBuilder:
         parser = self.getParser()
         first_buffer = True
         try:
-            while 1:
-                buffer = file.read(16*1024)
-                if not buffer:
-                    break
+            while buffer := file.read(16*1024):
                 parser.Parse(buffer, False)
                 if first_buffer and self.document.documentElement:
                     self._setup_subset(buffer)
diff --git a/contrib/tools/python3/src/Lib/xml/etree/ElementTree.py b/contrib/tools/python3/src/Lib/xml/etree/ElementTree.py
index fce0c2963a..bb7362d163 100644
--- a/contrib/tools/python3/src/Lib/xml/etree/ElementTree.py
+++ b/contrib/tools/python3/src/Lib/xml/etree/ElementTree.py
@@ -189,19 +189,6 @@ class Element:
         """
         return self.__class__(tag, attrib)
 
-    def copy(self):
-        """Return copy of current element.
-
-        This creates a shallow copy. Subelements will be shared with the
-        original tree.
-
-        """
-        warnings.warn(
-            "elem.copy() is deprecated. Use copy.copy(elem) instead.",
-            DeprecationWarning
-            )
-        return self.__copy__()
-
     def __copy__(self):
         elem = self.makeelement(self.tag, self.attrib)
         elem.text = self.text
@@ -214,9 +201,10 @@ class Element:
 
     def __bool__(self):
         warnings.warn(
-            "The behavior of this method will change in future versions.  "
+            "Testing an element's truth value will raise an exception in "
+            "future versions.  "
             "Use specific 'len(elem)' or 'elem is not None' test instead.",
-            FutureWarning, stacklevel=2
+            DeprecationWarning, stacklevel=2
             )
         return len(self._children) != 0 # emulate old behaviour, for now
 
@@ -580,10 +568,7 @@ class ElementTree:
                     # it with chunks.
                     self._root = parser._parse_whole(source)
                     return self._root
-            while True:
-                data = source.read(65536)
-                if not data:
-                    break
+            while data := source.read(65536):
                 parser.feed(data)
             self._root = parser.close()
             return self._root
diff --git a/contrib/tools/python3/src/Lib/xml/sax/__init__.py b/contrib/tools/python3/src/Lib/xml/sax/__init__.py
index 17b75879eb..b657310207 100644
--- a/contrib/tools/python3/src/Lib/xml/sax/__init__.py
+++ b/contrib/tools/python3/src/Lib/xml/sax/__init__.py
@@ -60,11 +60,7 @@ if _false:
 import os, sys
 if not sys.flags.ignore_environment and "PY_SAX_PARSER" in os.environ:
     default_parser_list = os.environ["PY_SAX_PARSER"].split(",")
-del os
-
-_key = "python.xml.sax.parser"
-if sys.platform[:4] == "java" and sys.registry.containsKey(_key):
-    default_parser_list = sys.registry.getProperty(_key).split(",")
+del os, sys
 
 
 def make_parser(parser_list=()):
@@ -93,15 +89,6 @@ def make_parser(parser_list=()):
 
 # --- Internal utility methods used by make_parser
 
-if sys.platform[ : 4] == "java":
-    def _create_parser(parser_name):
-        from org.python.core import imp
-        drv_module = imp.importName(parser_name, 0, globals())
-        return drv_module.create_parser()
-
-else:
-    def _create_parser(parser_name):
-        drv_module = __import__(parser_name,{},{},['create_parser'])
-        return drv_module.create_parser()
-
-del sys
+def _create_parser(parser_name):
+    drv_module = __import__(parser_name,{},{},['create_parser'])
+    return drv_module.create_parser()
diff --git a/contrib/tools/python3/src/Lib/xml/sax/_exceptions.py b/contrib/tools/python3/src/Lib/xml/sax/_exceptions.py
index a9b2ba35c6..f292dc3a8e 100644
--- a/contrib/tools/python3/src/Lib/xml/sax/_exceptions.py
+++ b/contrib/tools/python3/src/Lib/xml/sax/_exceptions.py
@@ -1,8 +1,4 @@
 """Different kinds of SAX Exceptions"""
-import sys
-if sys.platform[:4] == "java":
-    from java.lang import Exception
-del sys
 
 # ===== SAXEXCEPTION =====
 
diff --git a/contrib/tools/python3/src/Lib/xml/sax/expatreader.py b/contrib/tools/python3/src/Lib/xml/sax/expatreader.py
index e334ac9fea..b9ad52692d 100644
--- a/contrib/tools/python3/src/Lib/xml/sax/expatreader.py
+++ b/contrib/tools/python3/src/Lib/xml/sax/expatreader.py
@@ -12,12 +12,6 @@ from xml.sax.handler import feature_external_ges, feature_external_pes
 from xml.sax.handler import feature_string_interning
 from xml.sax.handler import property_xml_string, property_interning_dict
 
-# xml.parsers.expat does not raise ImportError in Jython
-import sys
-if sys.platform[:4] == "java":
-    raise SAXReaderNotAvailable("expat not available in Java", None)
-del sys
-
 try:
     from xml.parsers import expat
 except ImportError:
diff --git a/contrib/tools/python3/src/Lib/xml/sax/xmlreader.py b/contrib/tools/python3/src/Lib/xml/sax/xmlreader.py
index 716f228404..e906121d23 100644
--- a/contrib/tools/python3/src/Lib/xml/sax/xmlreader.py
+++ b/contrib/tools/python3/src/Lib/xml/sax/xmlreader.py
@@ -120,10 +120,8 @@ class IncrementalParser(XMLReader):
         file = source.getCharacterStream()
         if file is None:
             file = source.getByteStream()
-        buffer = file.read(self._bufsize)
-        while buffer:
+        while buffer := file.read(self._bufsize):
             self.feed(buffer)
-            buffer = file.read(self._bufsize)
         self.close()
 
     def feed(self, data):
diff --git a/contrib/tools/python3/src/Lib/xmlrpc/client.py b/contrib/tools/python3/src/Lib/xmlrpc/client.py
index a614cef6ab..ea8da766cb 100644
--- a/contrib/tools/python3/src/Lib/xmlrpc/client.py
+++ b/contrib/tools/python3/src/Lib/xmlrpc/client.py
@@ -850,9 +850,9 @@ class MultiCallIterator:
 
     def __getitem__(self, i):
         item = self.results[i]
-        if type(item) == type({}):
+        if isinstance(item, dict):
             raise Fault(item['faultCode'], item['faultString'])
-        elif type(item) == type([]):
+        elif isinstance(item, list):
             return item[0]
         else:
             raise ValueError("unexpected type in multicall result")
@@ -1339,10 +1339,7 @@ class Transport:
 
         p, u = self.getparser()
 
-        while 1:
-            data = stream.read(1024)
-            if not data:
-                break
+        while data := stream.read(1024):
             if self.verbose:
                 print("body:", repr(data))
             p.feed(data)
diff --git a/contrib/tools/python3/src/Lib/xmlrpc/server.py b/contrib/tools/python3/src/Lib/xmlrpc/server.py
index 0c4b558045..4dddb1d10e 100644
--- a/contrib/tools/python3/src/Lib/xmlrpc/server.py
+++ b/contrib/tools/python3/src/Lib/xmlrpc/server.py
@@ -720,9 +720,7 @@ class ServerHTMLDoc(pydoc.HTMLDoc):
                                 r'RFC[- ]?(\d+)|'
                                 r'PEP[- ]?(\d+)|'
                                 r'(self\.)?((?:\w|\.)+))\b')
-        while 1:
-            match = pattern.search(text, here)
-            if not match: break
+        while match := pattern.search(text, here):
             start, end = match.span()
             results.append(escape(text[here:start]))
 
diff --git a/contrib/tools/python3/src/Lib/ya.make b/contrib/tools/python3/src/Lib/ya.make
index f69f57310e..2bd807f000 100644
--- a/contrib/tools/python3/src/Lib/ya.make
+++ b/contrib/tools/python3/src/Lib/ya.make
@@ -4,9 +4,9 @@ ENABLE(PYBUILD_NO_PY)
 
 PY3_LIBRARY()
 
-VERSION(3.11.8)
+VERSION(3.12.2)
 
-ORIGINAL_SOURCE(https://github.com/python/cpython/archive/v3.11.8.tar.gz)
+ORIGINAL_SOURCE(https://github.com/python/cpython/archive/v3.12.2.tar.gz)
 
 LICENSE(Python-2.0)
 
@@ -24,15 +24,16 @@ PY_SRCS(
     __future__.py
     __hello__.py
     _aix_support.py
-    _bootsubprocess.py
     _collections_abc.py
     _compat_pickle.py
     _compression.py
     _markupbase.py
     _osx_support.py
     _py_abc.py
+    _pydatetime.py
     _pydecimal.py
     _pyio.py
+    _pylong.py
     _sitebuiltins.py
     _strptime.py
     _sysconfigdata_arcadia.py
@@ -43,7 +44,6 @@ PY_SRCS(
     antigravity.py
     argparse.py
     ast.py
-    asynchat.py
     asyncio/__init__.py
     asyncio/__main__.py
     asyncio/base_events.py
@@ -77,7 +77,6 @@ PY_SRCS(
     asyncio/unix_events.py
     asyncio/windows_events.py
     asyncio/windows_utils.py
-    asyncore.py
     base64.py
     bdb.py
     bisect.py
@@ -130,55 +129,6 @@ PY_SRCS(
     decimal.py
     difflib.py
     dis.py
-    distutils/__init__.py
-    distutils/_msvccompiler.py
-    distutils/archive_util.py
-    distutils/bcppcompiler.py
-    distutils/ccompiler.py
-    distutils/cmd.py
-    distutils/command/__init__.py
-    distutils/command/bdist.py
-    distutils/command/bdist_dumb.py
-    distutils/command/bdist_rpm.py
-    distutils/command/build.py
-    distutils/command/build_clib.py
-    distutils/command/build_ext.py
-    distutils/command/build_py.py
-    distutils/command/build_scripts.py
-    distutils/command/check.py
-    distutils/command/clean.py
-    distutils/command/config.py
-    distutils/command/install.py
-    distutils/command/install_data.py
-    distutils/command/install_egg_info.py
-    distutils/command/install_headers.py
-    distutils/command/install_lib.py
-    distutils/command/install_scripts.py
-    distutils/command/register.py
-    distutils/command/sdist.py
-    distutils/command/upload.py
-    distutils/config.py
-    distutils/core.py
-    distutils/cygwinccompiler.py
-    distutils/debug.py
-    distutils/dep_util.py
-    distutils/dir_util.py
-    distutils/dist.py
-    distutils/errors.py
-    distutils/extension.py
-    distutils/fancy_getopt.py
-    distutils/file_util.py
-    distutils/filelist.py
-    distutils/log.py
-    distutils/msvc9compiler.py
-    distutils/msvccompiler.py
-    distutils/spawn.py
-    distutils/sysconfig.py
-    distutils/text_file.py
-    distutils/unixccompiler.py
-    distutils/util.py
-    distutils/version.py
-    distutils/versionpredicate.py
     doctest.py
     email/__init__.py
     email/_encoded_words.py
@@ -361,7 +311,6 @@ PY_SRCS(
     http/server.py
     imaplib.py
     imghdr.py
-    imp.py
     importlib/__init__.py
     importlib/_abc.py
     importlib/_bootstrap.py
@@ -479,12 +428,12 @@ PY_SRCS(
     shutil.py
     signal.py
     site.py
-    smtpd.py
     smtplib.py
     sndhdr.py
     socket.py
     socketserver.py
     sqlite3/__init__.py
+    sqlite3/__main__.py
     sqlite3/dbapi2.py
     sqlite3/dump.py
     sre_compile.py
@@ -582,7 +531,10 @@ PY_SRCS(
     xmlrpc/client.py
     xmlrpc/server.py
     zipapp.py
-    zipfile.py
+    zipfile/__init__.py
+    zipfile/__main__.py
+    zipfile/_path/__init__.py
+    zipfile/_path/glob.py
     zipimport.py
     zoneinfo/__init__.py
     zoneinfo/_common.py
diff --git a/contrib/tools/python3/src/Lib/zipapp.py b/contrib/tools/python3/src/Lib/zipapp.py
index ce77632516..d8ebfcb6c7 100644
--- a/contrib/tools/python3/src/Lib/zipapp.py
+++ b/contrib/tools/python3/src/Lib/zipapp.py
@@ -136,7 +136,7 @@ def create_archive(source, target=None, interpreter=None, main=None,
         compression = (zipfile.ZIP_DEFLATED if compressed else
                        zipfile.ZIP_STORED)
         with zipfile.ZipFile(fd, 'w', compression=compression) as z:
-            for child in source.rglob('*'):
+            for child in sorted(source.rglob('*')):
                 arcname = child.relative_to(source)
                 if filter is None or filter(arcname):
                     z.write(child, arcname.as_posix())
diff --git a/contrib/tools/python3/src/Lib/zipfile.py b/contrib/tools/python3/src/Lib/zipfile/__init__.py
index 058d7163ea..8918484207 100644
--- a/contrib/tools/python3/src/Lib/zipfile.py
+++ b/contrib/tools/python3/src/Lib/zipfile/__init__.py
@@ -6,17 +6,13 @@ XXX references to utf-8 need further investigation.
 import binascii
 import importlib.util
 import io
-import itertools
 import os
-import posixpath
 import shutil
 import stat
 import struct
 import sys
 import threading
 import time
-import contextlib
-import pathlib
 
 try:
     import zlib # We may need its compression method
@@ -342,6 +338,24 @@ def _EndRecData(fpin):
     # Unable to find a valid end of central directory structure
     return None
 
+def _sanitize_filename(filename):
+    """Terminate the file name at the first null byte and
+    ensure paths always use forward slashes as the directory separator."""
+
+    # Terminate the file name at the first null byte.  Null bytes in file
+    # names are used as tricks by viruses in archives.
+    null_byte = filename.find(chr(0))
+    if null_byte >= 0:
+        filename = filename[0:null_byte]
+    # This is used to ensure paths in generated ZIP files always use
+    # forward slashes as the directory separator, as required by the
+    # ZIP format specification.
+    if os.sep != "/" and os.sep in filename:
+        filename = filename.replace(os.sep, "/")
+    if os.altsep and os.altsep != "/" and os.altsep in filename:
+        filename = filename.replace(os.altsep, "/")
+    return filename
+
 
 class ZipInfo (object):
     """Class with attributes describing each file in the ZIP archive."""
@@ -373,16 +387,9 @@ class ZipInfo (object):
     def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
         self.orig_filename = filename   # Original file name in archive
 
-        # Terminate the file name at the first null byte.  Null bytes in file
-        # names are used as tricks by viruses in archives.
-        null_byte = filename.find(chr(0))
-        if null_byte >= 0:
-            filename = filename[0:null_byte]
-        # This is used to ensure paths in generated ZIP files always use
-        # forward slashes as the directory separator, as required by the
-        # ZIP format specification.
-        if os.sep != "/" and os.sep in filename:
-            filename = filename.replace(os.sep, "/")
+        # Terminate the file name at the first null byte and
+        # ensure paths always use forward slashes as the directory separator.
+        filename = _sanitize_filename(filename)
 
         self.filename = filename        # Normalized file name
         self.date_time = date_time      # year, month, day, hour, min, sec
@@ -490,7 +497,7 @@ class ZipInfo (object):
         except UnicodeEncodeError:
             return self.filename.encode('utf-8'), self.flag_bits | _MASK_UTF_FILENAME
 
-    def _decodeExtra(self):
+    def _decodeExtra(self, filename_crc):
         # Try to decode the extra field.
         extra = self.extra
         unpack = struct.unpack
@@ -516,6 +523,22 @@ class ZipInfo (object):
                 except struct.error:
                     raise BadZipFile(f"Corrupt zip64 extra field. "
                                      f"{field} not found.") from None
+            elif tp == 0x7075:
+                data = extra[4:ln+4]
+                # Unicode Path Extra Field
+                try:
+                    up_version, up_name_crc = unpack('<BL', data[:5])
+                    if up_version == 1 and up_name_crc == filename_crc:
+                        up_unicode_name = data[5:].decode('utf-8')
+                        if up_unicode_name:
+                            self.filename = _sanitize_filename(up_unicode_name)
+                        else:
+                            import warnings
+                            warnings.warn("Empty unicode path extra field (0x7075)", stacklevel=2)
+                except struct.error as e:
+                    raise BadZipFile("Corrupt unicode path extra field (0x7075)") from e
+                except UnicodeDecodeError as e:
+                    raise BadZipFile('Corrupt unicode path extra field (0x7075): invalid utf-8 bytes') from e
 
             extra = extra[ln+4:]
 
@@ -559,7 +582,7 @@ class ZipInfo (object):
 
     def is_dir(self):
         """Return True if this archive member is a directory."""
-        return self.filename[-1] == '/'
+        return self.filename.endswith('/')
 
 
 # ZIP encryption uses the CRC32 one-byte primitive for scrambling some
@@ -853,6 +876,7 @@ class ZipExtFile(io.BufferedIOBase):
                 self._orig_compress_size = zipinfo.compress_size
                 self._orig_file_size = zipinfo.file_size
                 self._orig_start_crc = self._running_crc
+                self._orig_crc = self._expected_crc
                 self._seekable = True
         except AttributeError:
             pass
@@ -1075,17 +1099,17 @@ class ZipExtFile(io.BufferedIOBase):
             raise ValueError("I/O operation on closed file.")
         return self._seekable
 
-    def seek(self, offset, whence=0):
+    def seek(self, offset, whence=os.SEEK_SET):
         if self.closed:
             raise ValueError("seek on closed file.")
         if not self._seekable:
             raise io.UnsupportedOperation("underlying stream is not seekable")
         curr_pos = self.tell()
-        if whence == 0: # Seek from start of file
+        if whence == os.SEEK_SET:
             new_pos = offset
-        elif whence == 1: # Seek from current position
+        elif whence == os.SEEK_CUR:
             new_pos = curr_pos + offset
-        elif whence == 2: # Seek from EOF
+        elif whence == os.SEEK_END:
             new_pos = self._orig_file_size + offset
         else:
             raise ValueError("whence must be os.SEEK_SET (0), "
@@ -1104,10 +1128,23 @@ class ZipExtFile(io.BufferedIOBase):
             # Just move the _offset index if the new position is in the _readbuffer
             self._offset = buff_offset
             read_offset = 0
+        # Fast seek uncompressed unencrypted file
+        elif self._compress_type == ZIP_STORED and self._decrypter is None and read_offset > 0:
+            # disable CRC checking after first seeking - it would be invalid
+            self._expected_crc = None
+            # seek actual file taking already buffered data into account
+            read_offset -= len(self._readbuffer) - self._offset
+            self._fileobj.seek(read_offset, os.SEEK_CUR)
+            self._left -= read_offset
+            read_offset = 0
+            # flush read buffer
+            self._readbuffer = b''
+            self._offset = 0
         elif read_offset < 0:
             # Position is before the current position. Reset the ZipExtFile
             self._fileobj.seek(self._orig_compress_start)
             self._running_crc = self._orig_start_crc
+            self._expected_crc = self._orig_crc
             self._compress_left = self._orig_compress_size
             self._left = self._orig_file_size
             self._readbuffer = b''
@@ -1402,6 +1439,7 @@ class ZipFile:
             if self.debug > 2:
                 print(centdir)
             filename = fp.read(centdir[_CD_FILENAME_LENGTH])
+            orig_filename_crc = crc32(filename)
             flags = centdir[_CD_FLAG_BITS]
             if flags & _MASK_UTF_FILENAME:
                 # UTF-8 file names extension
@@ -1425,8 +1463,7 @@ class ZipFile:
             x._raw_time = t
             x.date_time = ( (d>>9)+1980, (d>>5)&0xF, d&0x1F,
                             t>>11, (t>>5)&0x3F, (t&0x1F) * 2 )
-
-            x._decodeExtra()
+            x._decodeExtra(orig_filename_crc)
             x.header_offset = x.header_offset + concat
             self.filelist.append(x)
             self.NameToInfo[x.filename] = x
@@ -1465,7 +1502,10 @@ class ZipFile:
                   file=file)
 
     def testzip(self):
-        """Read all the files and check the CRC."""
+        """Read all the files and check the CRC.
+
+        Return None if all files could be read successfully, or the name
+        of the offending file otherwise."""
         chunk_size = 2 ** 20
         for zinfo in self.filelist:
             try:
@@ -1577,7 +1617,7 @@ class ZipFile:
 
             fname = zef_file.read(fheader[_FH_FILENAME_LENGTH])
             if fheader[_FH_EXTRA_FIELD_LENGTH]:
-                zef_file.read(fheader[_FH_EXTRA_FIELD_LENGTH])
+                zef_file.seek(fheader[_FH_EXTRA_FIELD_LENGTH], whence=1)
 
             if zinfo.flag_bits & _MASK_COMPRESSED_PATCH:
                 # Zip 2.7: compressed patched data
@@ -1701,8 +1741,8 @@ class ZipFile:
             table = str.maketrans(illegal, '_' * len(illegal))
             cls._windows_illegal_name_trans_table = table
         arcname = arcname.translate(table)
-        # remove trailing dots
-        arcname = (x.rstrip('.') for x in arcname.split(pathsep))
+        # remove trailing dots and spaces
+        arcname = (x.rstrip(' .') for x in arcname.split(pathsep))
         # rejoin, removing empty parts.
         arcname = pathsep.join(x for x in arcname if x)
         return arcname
@@ -1730,6 +1770,9 @@ class ZipFile:
             # filter illegal characters on Windows
             arcname = self._sanitize_windows_name(arcname, os.path.sep)
 
+        if not arcname and not member.is_dir():
+            raise ValueError("Empty filename.")
+
         targetpath = os.path.join(targetpath, arcname)
         targetpath = os.path.normpath(targetpath)
 
@@ -1819,7 +1862,7 @@ class ZipFile:
                             date_time=time.localtime(time.time())[:6])
             zinfo.compress_type = self.compression
             zinfo._compresslevel = self.compresslevel
-            if zinfo.filename[-1] == '/':
+            if zinfo.filename.endswith('/'):
                 zinfo.external_attr = 0o40775 << 16   # drwxrwxr-x
                 zinfo.external_attr |= 0x10           # MS-DOS directory flag
             else:
@@ -2182,331 +2225,6 @@ class PyZipFile(ZipFile):
         return (fname, archivename)
 
 
-def _parents(path):
-    """
-    Given a path with elements separated by
-    posixpath.sep, generate all parents of that path.
-
-    >>> list(_parents('b/d'))
-    ['b']
-    >>> list(_parents('/b/d/'))
-    ['/b']
-    >>> list(_parents('b/d/f/'))
-    ['b/d', 'b']
-    >>> list(_parents('b'))
-    []
-    >>> list(_parents(''))
-    []
-    """
-    return itertools.islice(_ancestry(path), 1, None)
-
-
-def _ancestry(path):
-    """
-    Given a path with elements separated by
-    posixpath.sep, generate all elements of that path
-
-    >>> list(_ancestry('b/d'))
-    ['b/d', 'b']
-    >>> list(_ancestry('/b/d/'))
-    ['/b/d', '/b']
-    >>> list(_ancestry('b/d/f/'))
-    ['b/d/f', 'b/d', 'b']
-    >>> list(_ancestry('b'))
-    ['b']
-    >>> list(_ancestry(''))
-    []
-    """
-    path = path.rstrip(posixpath.sep)
-    while path and path != posixpath.sep:
-        yield path
-        path, tail = posixpath.split(path)
-
-
-_dedupe = dict.fromkeys
-"""Deduplicate an iterable in original order"""
-
-
-def _difference(minuend, subtrahend):
-    """
-    Return items in minuend not in subtrahend, retaining order
-    with O(1) lookup.
-    """
-    return itertools.filterfalse(set(subtrahend).__contains__, minuend)
-
-
-class CompleteDirs(ZipFile):
-    """
-    A ZipFile subclass that ensures that implied directories
-    are always included in the namelist.
-    """
-
-    @staticmethod
-    def _implied_dirs(names):
-        parents = itertools.chain.from_iterable(map(_parents, names))
-        as_dirs = (p + posixpath.sep for p in parents)
-        return _dedupe(_difference(as_dirs, names))
-
-    def namelist(self):
-        names = super(CompleteDirs, self).namelist()
-        return names + list(self._implied_dirs(names))
-
-    def _name_set(self):
-        return set(self.namelist())
-
-    def resolve_dir(self, name):
-        """
-        If the name represents a directory, return that name
-        as a directory (with the trailing slash).
-        """
-        names = self._name_set()
-        dirname = name + '/'
-        dir_match = name not in names and dirname in names
-        return dirname if dir_match else name
-
-    def getinfo(self, name):
-        """
-        Supplement getinfo for implied dirs.
-        """
-        try:
-            return super().getinfo(name)
-        except KeyError:
-            if not name.endswith('/') or name not in self._name_set():
-                raise
-            return ZipInfo(filename=name)
-
-    @classmethod
-    def make(cls, source):
-        """
-        Given a source (filename or zipfile), return an
-        appropriate CompleteDirs subclass.
-        """
-        if isinstance(source, CompleteDirs):
-            return source
-
-        if not isinstance(source, ZipFile):
-            return cls(source)
-
-        # Only allow for FastLookup when supplied zipfile is read-only
-        if 'r' not in source.mode:
-            cls = CompleteDirs
-
-        source.__class__ = cls
-        return source
-
-
-class FastLookup(CompleteDirs):
-    """
-    ZipFile subclass to ensure implicit
-    dirs exist and are resolved rapidly.
-    """
-
-    def namelist(self):
-        with contextlib.suppress(AttributeError):
-            return self.__names
-        self.__names = super(FastLookup, self).namelist()
-        return self.__names
-
-    def _name_set(self):
-        with contextlib.suppress(AttributeError):
-            return self.__lookup
-        self.__lookup = super(FastLookup, self)._name_set()
-        return self.__lookup
-
-
-def _extract_text_encoding(encoding=None, *args, **kwargs):
-    # stacklevel=3 so that the caller of the caller see any warning.
-    return io.text_encoding(encoding, 3), args, kwargs
-
-
-class Path:
-    """
-    A pathlib-compatible interface for zip files.
-
-    Consider a zip file with this structure::
-
-        .
-        ├── a.txt
-        └── b
-            ├── c.txt
-            └── d
-                └── e.txt
-
-    >>> data = io.BytesIO()
-    >>> zf = ZipFile(data, 'w')
-    >>> zf.writestr('a.txt', 'content of a')
-    >>> zf.writestr('b/c.txt', 'content of c')
-    >>> zf.writestr('b/d/e.txt', 'content of e')
-    >>> zf.filename = 'mem/abcde.zip'
-
-    Path accepts the zipfile object itself or a filename
-
-    >>> root = Path(zf)
-
-    From there, several path operations are available.
-
-    Directory iteration (including the zip file itself):
-
-    >>> a, b = root.iterdir()
-    >>> a
-    Path('mem/abcde.zip', 'a.txt')
-    >>> b
-    Path('mem/abcde.zip', 'b/')
-
-    name property:
-
-    >>> b.name
-    'b'
-
-    join with divide operator:
-
-    >>> c = b / 'c.txt'
-    >>> c
-    Path('mem/abcde.zip', 'b/c.txt')
-    >>> c.name
-    'c.txt'
-
-    Read text:
-
-    >>> c.read_text()
-    'content of c'
-
-    existence:
-
-    >>> c.exists()
-    True
-    >>> (b / 'missing.txt').exists()
-    False
-
-    Coercion to string:
-
-    >>> import os
-    >>> str(c).replace(os.sep, posixpath.sep)
-    'mem/abcde.zip/b/c.txt'
-
-    At the root, ``name``, ``filename``, and ``parent``
-    resolve to the zipfile. Note these attributes are not
-    valid and will raise a ``ValueError`` if the zipfile
-    has no filename.
-
-    >>> root.name
-    'abcde.zip'
-    >>> str(root.filename).replace(os.sep, posixpath.sep)
-    'mem/abcde.zip'
-    >>> str(root.parent)
-    'mem'
-    """
-
-    __repr = "{self.__class__.__name__}({self.root.filename!r}, {self.at!r})"
-
-    def __init__(self, root, at=""):
-        """
-        Construct a Path from a ZipFile or filename.
-
-        Note: When the source is an existing ZipFile object,
-        its type (__class__) will be mutated to a
-        specialized type. If the caller wishes to retain the
-        original type, the caller should either create a
-        separate ZipFile object or pass a filename.
-        """
-        self.root = FastLookup.make(root)
-        self.at = at
-
-    def open(self, mode='r', *args, pwd=None, **kwargs):
-        """
-        Open this entry as text or binary following the semantics
-        of ``pathlib.Path.open()`` by passing arguments through
-        to io.TextIOWrapper().
-        """
-        if self.is_dir():
-            raise IsADirectoryError(self)
-        zip_mode = mode[0]
-        if not self.exists() and zip_mode == 'r':
-            raise FileNotFoundError(self)
-        stream = self.root.open(self.at, zip_mode, pwd=pwd)
-        if 'b' in mode:
-            if args or kwargs:
-                raise ValueError("encoding args invalid for binary operation")
-            return stream
-        # Text mode:
-        encoding, args, kwargs = _extract_text_encoding(*args, **kwargs)
-        return io.TextIOWrapper(stream, encoding, *args, **kwargs)
-
-    def _base(self):
-        return pathlib.PurePosixPath(self.at or self.root.filename)
-
-    @property
-    def name(self):
-        return self._base().name
-
-    @property
-    def suffix(self):
-        return self._base().suffix
-
-    @property
-    def suffixes(self):
-        return self._base().suffixes
-
-    @property
-    def stem(self):
-        return self._base().stem
-
-    @property
-    def filename(self):
-        return pathlib.Path(self.root.filename).joinpath(self.at)
-
-    def read_text(self, *args, **kwargs):
-        encoding, args, kwargs = _extract_text_encoding(*args, **kwargs)
-        with self.open('r', encoding, *args, **kwargs) as strm:
-            return strm.read()
-
-    def read_bytes(self):
-        with self.open('rb') as strm:
-            return strm.read()
-
-    def _is_child(self, path):
-        return posixpath.dirname(path.at.rstrip("/")) == self.at.rstrip("/")
-
-    def _next(self, at):
-        return self.__class__(self.root, at)
-
-    def is_dir(self):
-        return not self.at or self.at.endswith("/")
-
-    def is_file(self):
-        return self.exists() and not self.is_dir()
-
-    def exists(self):
-        return self.at in self.root._name_set()
-
-    def iterdir(self):
-        if not self.is_dir():
-            raise ValueError("Can't listdir a file")
-        subs = map(self._next, self.root.namelist())
-        return filter(self._is_child, subs)
-
-    def __str__(self):
-        return posixpath.join(self.root.filename, self.at)
-
-    def __repr__(self):
-        return self.__repr.format(self=self)
-
-    def joinpath(self, *other):
-        next = posixpath.join(self.at, *other)
-        return self._next(self.root.resolve_dir(next))
-
-    __truediv__ = joinpath
-
-    @property
-    def parent(self):
-        if not self.at:
-            return self.filename.parent
-        parent_at = posixpath.dirname(self.at.rstrip('/'))
-        if parent_at:
-            parent_at += '/'
-        return self._next(parent_at)
-
-
 def main(args=None):
     import argparse
 
@@ -2577,5 +2295,9 @@ def main(args=None):
                 addToZip(zf, path, zippath)
 
 
-if __name__ == "__main__":
-    main()
+from ._path import (  # noqa: E402
+    Path,
+
+    # used privately for tests
+    CompleteDirs,  # noqa: F401
+)
diff --git a/contrib/tools/python3/src/Lib/zipfile/__main__.py b/contrib/tools/python3/src/Lib/zipfile/__main__.py
new file mode 100644
index 0000000000..868d99efc3
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/zipfile/__main__.py
@@ -0,0 +1,4 @@
+from . import main
+
+if __name__ == "__main__":
+    main()
diff --git a/contrib/tools/python3/src/Lib/zipfile/_path/__init__.py b/contrib/tools/python3/src/Lib/zipfile/_path/__init__.py
new file mode 100644
index 0000000000..78c413563b
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/zipfile/_path/__init__.py
@@ -0,0 +1,395 @@
+import io
+import posixpath
+import zipfile
+import itertools
+import contextlib
+import pathlib
+import re
+
+from .glob import translate
+
+
+__all__ = ['Path']
+
+
+def _parents(path):
+    """
+    Given a path with elements separated by
+    posixpath.sep, generate all parents of that path.
+
+    >>> list(_parents('b/d'))
+    ['b']
+    >>> list(_parents('/b/d/'))
+    ['/b']
+    >>> list(_parents('b/d/f/'))
+    ['b/d', 'b']
+    >>> list(_parents('b'))
+    []
+    >>> list(_parents(''))
+    []
+    """
+    return itertools.islice(_ancestry(path), 1, None)
+
+
+def _ancestry(path):
+    """
+    Given a path with elements separated by
+    posixpath.sep, generate all elements of that path
+
+    >>> list(_ancestry('b/d'))
+    ['b/d', 'b']
+    >>> list(_ancestry('/b/d/'))
+    ['/b/d', '/b']
+    >>> list(_ancestry('b/d/f/'))
+    ['b/d/f', 'b/d', 'b']
+    >>> list(_ancestry('b'))
+    ['b']
+    >>> list(_ancestry(''))
+    []
+    """
+    path = path.rstrip(posixpath.sep)
+    while path and path != posixpath.sep:
+        yield path
+        path, tail = posixpath.split(path)
+
+
+_dedupe = dict.fromkeys
+"""Deduplicate an iterable in original order"""
+
+
+def _difference(minuend, subtrahend):
+    """
+    Return items in minuend not in subtrahend, retaining order
+    with O(1) lookup.
+    """
+    return itertools.filterfalse(set(subtrahend).__contains__, minuend)
+
+
+class InitializedState:
+    """
+    Mix-in to save the initialization state for pickling.
+    """
+
+    def __init__(self, *args, **kwargs):
+        self.__args = args
+        self.__kwargs = kwargs
+        super().__init__(*args, **kwargs)
+
+    def __getstate__(self):
+        return self.__args, self.__kwargs
+
+    def __setstate__(self, state):
+        args, kwargs = state
+        super().__init__(*args, **kwargs)
+
+
+class CompleteDirs(InitializedState, zipfile.ZipFile):
+    """
+    A ZipFile subclass that ensures that implied directories
+    are always included in the namelist.
+
+    >>> list(CompleteDirs._implied_dirs(['foo/bar.txt', 'foo/bar/baz.txt']))
+    ['foo/', 'foo/bar/']
+    >>> list(CompleteDirs._implied_dirs(['foo/bar.txt', 'foo/bar/baz.txt', 'foo/bar/']))
+    ['foo/']
+    """
+
+    @staticmethod
+    def _implied_dirs(names):
+        parents = itertools.chain.from_iterable(map(_parents, names))
+        as_dirs = (p + posixpath.sep for p in parents)
+        return _dedupe(_difference(as_dirs, names))
+
+    def namelist(self):
+        names = super().namelist()
+        return names + list(self._implied_dirs(names))
+
+    def _name_set(self):
+        return set(self.namelist())
+
+    def resolve_dir(self, name):
+        """
+        If the name represents a directory, return that name
+        as a directory (with the trailing slash).
+        """
+        names = self._name_set()
+        dirname = name + '/'
+        dir_match = name not in names and dirname in names
+        return dirname if dir_match else name
+
+    def getinfo(self, name):
+        """
+        Supplement getinfo for implied dirs.
+        """
+        try:
+            return super().getinfo(name)
+        except KeyError:
+            if not name.endswith('/') or name not in self._name_set():
+                raise
+            return zipfile.ZipInfo(filename=name)
+
+    @classmethod
+    def make(cls, source):
+        """
+        Given a source (filename or zipfile), return an
+        appropriate CompleteDirs subclass.
+        """
+        if isinstance(source, CompleteDirs):
+            return source
+
+        if not isinstance(source, zipfile.ZipFile):
+            return cls(source)
+
+        # Only allow for FastLookup when supplied zipfile is read-only
+        if 'r' not in source.mode:
+            cls = CompleteDirs
+
+        source.__class__ = cls
+        return source
+
+
+class FastLookup(CompleteDirs):
+    """
+    ZipFile subclass to ensure implicit
+    dirs exist and are resolved rapidly.
+    """
+
+    def namelist(self):
+        with contextlib.suppress(AttributeError):
+            return self.__names
+        self.__names = super().namelist()
+        return self.__names
+
+    def _name_set(self):
+        with contextlib.suppress(AttributeError):
+            return self.__lookup
+        self.__lookup = super()._name_set()
+        return self.__lookup
+
+
+def _extract_text_encoding(encoding=None, *args, **kwargs):
+    # stacklevel=3 so that the caller of the caller see any warning.
+    return io.text_encoding(encoding, 3), args, kwargs
+
+
+class Path:
+    """
+    A pathlib-compatible interface for zip files.
+
+    Consider a zip file with this structure::
+
+        .
+        ├── a.txt
+        └── b
+            ├── c.txt
+            └── d
+                └── e.txt
+
+    >>> data = io.BytesIO()
+    >>> zf = ZipFile(data, 'w')
+    >>> zf.writestr('a.txt', 'content of a')
+    >>> zf.writestr('b/c.txt', 'content of c')
+    >>> zf.writestr('b/d/e.txt', 'content of e')
+    >>> zf.filename = 'mem/abcde.zip'
+
+    Path accepts the zipfile object itself or a filename
+
+    >>> root = Path(zf)
+
+    From there, several path operations are available.
+
+    Directory iteration (including the zip file itself):
+
+    >>> a, b = root.iterdir()
+    >>> a
+    Path('mem/abcde.zip', 'a.txt')
+    >>> b
+    Path('mem/abcde.zip', 'b/')
+
+    name property:
+
+    >>> b.name
+    'b'
+
+    join with divide operator:
+
+    >>> c = b / 'c.txt'
+    >>> c
+    Path('mem/abcde.zip', 'b/c.txt')
+    >>> c.name
+    'c.txt'
+
+    Read text:
+
+    >>> c.read_text(encoding='utf-8')
+    'content of c'
+
+    existence:
+
+    >>> c.exists()
+    True
+    >>> (b / 'missing.txt').exists()
+    False
+
+    Coercion to string:
+
+    >>> import os
+    >>> str(c).replace(os.sep, posixpath.sep)
+    'mem/abcde.zip/b/c.txt'
+
+    At the root, ``name``, ``filename``, and ``parent``
+    resolve to the zipfile. Note these attributes are not
+    valid and will raise a ``ValueError`` if the zipfile
+    has no filename.
+
+    >>> root.name
+    'abcde.zip'
+    >>> str(root.filename).replace(os.sep, posixpath.sep)
+    'mem/abcde.zip'
+    >>> str(root.parent)
+    'mem'
+    """
+
+    __repr = "{self.__class__.__name__}({self.root.filename!r}, {self.at!r})"
+
+    def __init__(self, root, at=""):
+        """
+        Construct a Path from a ZipFile or filename.
+
+        Note: When the source is an existing ZipFile object,
+        its type (__class__) will be mutated to a
+        specialized type. If the caller wishes to retain the
+        original type, the caller should either create a
+        separate ZipFile object or pass a filename.
+        """
+        self.root = FastLookup.make(root)
+        self.at = at
+
+    def __eq__(self, other):
+        """
+        >>> Path(zipfile.ZipFile(io.BytesIO(), 'w')) == 'foo'
+        False
+        """
+        if self.__class__ is not other.__class__:
+            return NotImplemented
+        return (self.root, self.at) == (other.root, other.at)
+
+    def __hash__(self):
+        return hash((self.root, self.at))
+
+    def open(self, mode='r', *args, pwd=None, **kwargs):
+        """
+        Open this entry as text or binary following the semantics
+        of ``pathlib.Path.open()`` by passing arguments through
+        to io.TextIOWrapper().
+        """
+        if self.is_dir():
+            raise IsADirectoryError(self)
+        zip_mode = mode[0]
+        if not self.exists() and zip_mode == 'r':
+            raise FileNotFoundError(self)
+        stream = self.root.open(self.at, zip_mode, pwd=pwd)
+        if 'b' in mode:
+            if args or kwargs:
+                raise ValueError("encoding args invalid for binary operation")
+            return stream
+        # Text mode:
+        encoding, args, kwargs = _extract_text_encoding(*args, **kwargs)
+        return io.TextIOWrapper(stream, encoding, *args, **kwargs)
+
+    def _base(self):
+        return pathlib.PurePosixPath(self.at or self.root.filename)
+
+    @property
+    def name(self):
+        return self._base().name
+
+    @property
+    def suffix(self):
+        return self._base().suffix
+
+    @property
+    def suffixes(self):
+        return self._base().suffixes
+
+    @property
+    def stem(self):
+        return self._base().stem
+
+    @property
+    def filename(self):
+        return pathlib.Path(self.root.filename).joinpath(self.at)
+
+    def read_text(self, *args, **kwargs):
+        encoding, args, kwargs = _extract_text_encoding(*args, **kwargs)
+        with self.open('r', encoding, *args, **kwargs) as strm:
+            return strm.read()
+
+    def read_bytes(self):
+        with self.open('rb') as strm:
+            return strm.read()
+
+    def _is_child(self, path):
+        return posixpath.dirname(path.at.rstrip("/")) == self.at.rstrip("/")
+
+    def _next(self, at):
+        return self.__class__(self.root, at)
+
+    def is_dir(self):
+        return not self.at or self.at.endswith("/")
+
+    def is_file(self):
+        return self.exists() and not self.is_dir()
+
+    def exists(self):
+        return self.at in self.root._name_set()
+
+    def iterdir(self):
+        if not self.is_dir():
+            raise ValueError("Can't listdir a file")
+        subs = map(self._next, self.root.namelist())
+        return filter(self._is_child, subs)
+
+    def match(self, path_pattern):
+        return pathlib.PurePosixPath(self.at).match(path_pattern)
+
+    def is_symlink(self):
+        """
+        Return whether this path is a symlink. Always false (python/cpython#82102).
+        """
+        return False
+
+    def glob(self, pattern):
+        if not pattern:
+            raise ValueError(f"Unacceptable pattern: {pattern!r}")
+
+        prefix = re.escape(self.at)
+        matches = re.compile(prefix + translate(pattern)).fullmatch
+        return map(self._next, filter(matches, self.root.namelist()))
+
+    def rglob(self, pattern):
+        return self.glob(f'**/{pattern}')
+
+    def relative_to(self, other, *extra):
+        return posixpath.relpath(str(self), str(other.joinpath(*extra)))
+
+    def __str__(self):
+        return posixpath.join(self.root.filename, self.at)
+
+    def __repr__(self):
+        return self.__repr.format(self=self)
+
+    def joinpath(self, *other):
+        next = posixpath.join(self.at, *other)
+        return self._next(self.root.resolve_dir(next))
+
+    __truediv__ = joinpath
+
+    @property
+    def parent(self):
+        if not self.at:
+            return self.filename.parent
+        parent_at = posixpath.dirname(self.at.rstrip('/'))
+        if parent_at:
+            parent_at += '/'
+        return self._next(parent_at)
diff --git a/contrib/tools/python3/src/Lib/zipfile/_path/glob.py b/contrib/tools/python3/src/Lib/zipfile/_path/glob.py
new file mode 100644
index 0000000000..4a2e665e27
--- /dev/null
+++ b/contrib/tools/python3/src/Lib/zipfile/_path/glob.py
@@ -0,0 +1,40 @@
+import re
+
+
+def translate(pattern):
+    r"""
+    Given a glob pattern, produce a regex that matches it.
+
+    >>> translate('*.txt')
+    '[^/]*\\.txt'
+    >>> translate('a?txt')
+    'a.txt'
+    >>> translate('**/*')
+    '.*/[^/]*'
+    """
+    return ''.join(map(replace, separate(pattern)))
+
+
+def separate(pattern):
+    """
+    Separate out character sets to avoid translating their contents.
+
+    >>> [m.group(0) for m in separate('*.txt')]
+    ['*.txt']
+    >>> [m.group(0) for m in separate('a[?]txt')]
+    ['a', '[?]', 'txt']
+    """
+    return re.finditer(r'([^\[]+)|(?P<set>[\[].*?[\]])|([\[][^\]]*$)', pattern)
+
+
+def replace(match):
+    """
+    Perform the replacements for a match from :func:`separate`.
+    """
+
+    return match.group('set') or (
+        re.escape(match.group(0))
+        .replace('\\*\\*', r'.*')
+        .replace('\\*', r'[^/]*')
+        .replace('\\?', r'.')
+    )
diff --git a/contrib/tools/python3/src/Lib/zipimport.py b/contrib/tools/python3/src/Lib/zipimport.py
index e9da8be5fa..a7333a4c49 100644
--- a/contrib/tools/python3/src/Lib/zipimport.py
+++ b/contrib/tools/python3/src/Lib/zipimport.py
@@ -101,64 +101,6 @@ class zipimporter(_bootstrap_external._LoaderBasics):
             self.prefix += path_sep
 
 
-    # Check whether we can satisfy the import of the module named by
-    # 'fullname', or whether it could be a portion of a namespace
-    # package. Return self if we can load it, a string containing the
-    # full path if it's a possible namespace portion, None if we
-    # can't load it.
-    def find_loader(self, fullname, path=None):
-        """find_loader(fullname, path=None) -> self, str or None.
-
-        Search for a module specified by 'fullname'. 'fullname' must be the
-        fully qualified (dotted) module name. It returns the zipimporter
-        instance itself if the module was found, a string containing the
-        full path name if it's possibly a portion of a namespace package,
-        or None otherwise. The optional 'path' argument is ignored -- it's
-        there for compatibility with the importer protocol.
-
-        Deprecated since Python 3.10. Use find_spec() instead.
-        """
-        _warnings.warn("zipimporter.find_loader() is deprecated and slated for "
-                       "removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        mi = _get_module_info(self, fullname)
-        if mi is not None:
-            # This is a module or package.
-            return self, []
-
-        # Not a module or regular package. See if this is a directory, and
-        # therefore possibly a portion of a namespace package.
-
-        # We're only interested in the last path component of fullname
-        # earlier components are recorded in self.prefix.
-        modpath = _get_module_path(self, fullname)
-        if _is_dir(self, modpath):
-            # This is possibly a portion of a namespace
-            # package. Return the string representing its path,
-            # without a trailing separator.
-            return None, [f'{self.archive}{path_sep}{modpath}']
-
-        return None, []
-
-
-    # Check whether we can satisfy the import of the module named by
-    # 'fullname'. Return self if we can, None if we can't.
-    def find_module(self, fullname, path=None):
-        """find_module(fullname, path=None) -> self or None.
-
-        Search for a module specified by 'fullname'. 'fullname' must be the
-        fully qualified (dotted) module name. It returns the zipimporter
-        instance itself if the module was found, or None if it wasn't.
-        The optional 'path' argument is ignored -- it's there for compatibility
-        with the importer protocol.
-
-        Deprecated since Python 3.10. Use find_spec() instead.
-        """
-        _warnings.warn("zipimporter.find_module() is deprecated and slated for "
-                       "removal in Python 3.12; use find_spec() instead",
-                       DeprecationWarning)
-        return self.find_loader(fullname, path)[0]
-
     def find_spec(self, fullname, target=None):
         """Create a ModuleSpec for the specified module.
 
diff --git a/contrib/tools/python3/src/Lib/zoneinfo/_tzpath.py b/contrib/tools/python3/src/Lib/zoneinfo/_tzpath.py
index 4985dce2dc..5db17bea04 100644
--- a/contrib/tools/python3/src/Lib/zoneinfo/_tzpath.py
+++ b/contrib/tools/python3/src/Lib/zoneinfo/_tzpath.py
@@ -2,7 +2,7 @@ import os
 import sysconfig
 
 
-def reset_tzpath(to=None):
+def _reset_tzpath(to=None, stacklevel=4):
     global TZPATH
 
     tzpaths = to
@@ -18,17 +18,22 @@ def reset_tzpath(to=None):
         base_tzpath = tzpaths
     else:
         env_var = os.environ.get("PYTHONTZPATH", None)
-        if env_var is not None:
-            base_tzpath = _parse_python_tzpath(env_var)
-        else:
-            base_tzpath = _parse_python_tzpath(
-                sysconfig.get_config_var("TZPATH")
-            )
+        if env_var is None:
+            env_var = sysconfig.get_config_var("TZPATH")
+        base_tzpath = _parse_python_tzpath(env_var, stacklevel)
 
     TZPATH = tuple(base_tzpath)
 
 
-def _parse_python_tzpath(env_var):
+def reset_tzpath(to=None):
+    """Reset global TZPATH."""
+    # We need `_reset_tzpath` helper function because it produces a warning,
+    # it is used as both a module-level call and a public API.
+    # This is how we equalize the stacklevel for both calls.
+    _reset_tzpath(to)
+
+
+def _parse_python_tzpath(env_var, stacklevel):
     if not env_var:
         return ()
 
@@ -45,6 +50,7 @@ def _parse_python_tzpath(env_var):
             "Invalid paths specified in PYTHONTZPATH environment variable. "
             + msg,
             InvalidTZPathWarning,
+            stacklevel=stacklevel,
         )
 
     return new_tzpath
@@ -172,4 +178,4 @@ class InvalidTZPathWarning(RuntimeWarning):
 
 
 TZPATH = ()
-reset_tzpath()
+_reset_tzpath(stacklevel=5)