Library import 16 (#2433)

Co-authored-by: robot-piglet <[email protected]>
Co-authored-by: deshevoy <[email protected]>
Co-authored-by: robot-contrib <[email protected]>
Co-authored-by: thegeorg <[email protected]>
Co-authored-by: robot-ya-builder <[email protected]>
Co-authored-by: svidyuk <[email protected]>
Co-authored-by: shadchin <[email protected]>
Co-authored-by: robot-ratatosk <[email protected]>
Co-authored-by: innokentii <[email protected]>
Co-authored-by: arkady-e1ppa <[email protected]>
Co-authored-by: snermolaev <[email protected]>
Co-authored-by: dimdim11 <[email protected]>
Co-authored-by: kickbutt <[email protected]>
Co-authored-by: abdullinsaid <[email protected]>
Co-authored-by: korsunandrei <[email protected]>
Co-authored-by: petrk <[email protected]>
Co-authored-by: miroslav2 <[email protected]>
Co-authored-by: serjflint <[email protected]>
Co-authored-by: akhropov <[email protected]>
Co-authored-by: prettyboy <[email protected]>
Co-authored-by: ilikepugs <[email protected]>
Co-authored-by: hiddenpath <[email protected]>
Co-authored-by: mikhnenko <[email protected]>
Co-authored-by: spreis <[email protected]>
Co-authored-by: andreyshspb <[email protected]>
Co-authored-by: dimaandreev <[email protected]>
Co-authored-by: rashid <[email protected]>
Co-authored-by: robot-ydb-importer <[email protected]>
Co-authored-by: r-vetrov <[email protected]>
Co-authored-by: ypodlesov <[email protected]>
Co-authored-by: zaverden <[email protected]>
Co-authored-by: vpozdyayev <[email protected]>
Co-authored-by: robot-cozmo <[email protected]>
Co-authored-by: v-korovin <[email protected]>
Co-authored-by: arikon <[email protected]>
Co-authored-by: khoden <[email protected]>
Co-authored-by: psydmm <[email protected]>
Co-authored-by: robot-javacom <[email protected]>
Co-authored-by: dtorilov <[email protected]>
Co-authored-by: sennikovmv <[email protected]>
Co-authored-by: hcpp <[email protected]>

1 files changed, 0 insertions, 529 deletions

diff --git a/contrib/tools/python3/src/Lib/pkgutil.py b/contrib/tools/python3/src/Lib/pkgutil.py
deleted file mode 100644
index dccbec52aa7..00000000000
--- a/contrib/tools/python3/src/Lib/pkgutil.py
+++ /dev/null
@@ -1,529 +0,0 @@
-"""Utilities to support packages."""
-
-from collections import namedtuple
-from functools import singledispatch as simplegeneric
-import importlib
-import importlib.util
-import importlib.machinery
-import os
-import os.path
-import sys
-from types import ModuleType
-import warnings
-
-__all__ = [
-    'get_importer', 'iter_importers', 'get_loader', 'find_loader',
-    'walk_packages', 'iter_modules', 'get_data',
-    'read_code', 'extend_path',
-    'ModuleInfo',
-]
-
-
-ModuleInfo = namedtuple('ModuleInfo', 'module_finder name ispkg')
-ModuleInfo.__doc__ = 'A namedtuple with minimal info about a module.'
-
-
-def read_code(stream):
-    # This helper is needed in order for the PEP 302 emulation to
-    # correctly handle compiled files
-    import marshal
-
-    magic = stream.read(4)
-    if magic != importlib.util.MAGIC_NUMBER:
-        return None
-
-    stream.read(12) # Skip rest of the header
-    return marshal.load(stream)
-
-
-def walk_packages(path=None, prefix='', onerror=None):
-    """Yields ModuleInfo for all modules recursively
-    on path, or, if path is None, all accessible modules.
-
-    'path' should be either None or a list of paths to look for
-    modules in.
-
-    'prefix' is a string to output on the front of every module name
-    on output.
-
-    Note that this function must import all *packages* (NOT all
-    modules!) on the given path, in order to access the __path__
-    attribute to find submodules.
-
-    'onerror' is a function which gets called with one argument (the
-    name of the package which was being imported) if any exception
-    occurs while trying to import a package.  If no onerror function is
-    supplied, ImportErrors are caught and ignored, while all other
-    exceptions are propagated, terminating the search.
-
-    Examples:
-
-    # list all modules python can access
-    walk_packages()
-
-    # list all submodules of ctypes
-    walk_packages(ctypes.__path__, ctypes.__name__+'.')
-    """
-
-    def seen(p, m={}):
-        if p in m:
-            return True
-        m[p] = True
-
-    for info in iter_modules(path, prefix):
-        yield info
-
-        if info.ispkg:
-            try:
-                __import__(info.name)
-            except ImportError:
-                if onerror is not None:
-                    onerror(info.name)
-            except Exception:
-                if onerror is not None:
-                    onerror(info.name)
-                else:
-                    raise
-            else:
-                path = getattr(sys.modules[info.name], '__path__', None) or []
-
-                # don't traverse path items we've seen before
-                path = [p for p in path if not seen(p)]
-
-                yield from walk_packages(path, info.name+'.', onerror)
-
-
-def iter_modules(path=None, prefix=''):
-    """Yields ModuleInfo for all submodules on path,
-    or, if path is None, all top-level modules on sys.path.
-
-    'path' should be either None or a list of paths to look for
-    modules in.
-
-    'prefix' is a string to output on the front of every module name
-    on output.
-    """
-    if path is None:
-        importers = iter_importers()
-    elif isinstance(path, str):
-        raise ValueError("path must be None or list of paths to look for "
-                        "modules in")
-    else:
-        importers = map(get_importer, path)
-
-    yielded = {}
-    for i in importers:
-        for name, ispkg in iter_importer_modules(i, prefix):
-            if name not in yielded:
-                yielded[name] = 1
-                yield ModuleInfo(i, name, ispkg)
-
-
-@simplegeneric
-def iter_importer_modules(importer, prefix=''):
-    if not hasattr(importer, 'iter_modules'):
-        return []
-    return importer.iter_modules(prefix)
-
-
-# Implement a file walker for the normal importlib path hook
-def _iter_file_finder_modules(importer, prefix=''):
-    if importer.path is None or not os.path.isdir(importer.path):
-        return
-
-    yielded = {}
-    import inspect
-    try:
-        filenames = os.listdir(importer.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(importer.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
-
-iter_importer_modules.register(
-    importlib.machinery.FileFinder, _iter_file_finder_modules)
-
-
-try:
-    import zipimport
-    from zipimport import zipimporter
-
-    def iter_zipimport_modules(importer, prefix=''):
-        dirlist = sorted(zipimport._zip_directory_cache[importer.archive])
-        _prefix = importer.prefix
-        plen = len(_prefix)
-        yielded = {}
-        import inspect
-        for fn in dirlist:
-            if not fn.startswith(_prefix):
-                continue
-
-            fn = fn[plen:].split(os.sep)
-
-            if len(fn)==2 and fn[1].startswith('__init__.py'):
-                if fn[0] not in yielded:
-                    yielded[fn[0]] = 1
-                    yield prefix + fn[0], True
-
-            if len(fn)!=1:
-                continue
-
-            modname = inspect.getmodulename(fn[0])
-            if modname=='__init__':
-                continue
-
-            if modname and '.' not in modname and modname not in yielded:
-                yielded[modname] = 1
-                yield prefix + modname, False
-
-    iter_importer_modules.register(zipimporter, iter_zipimport_modules)
-
-except ImportError:
-    pass
-
-
-def get_importer(path_item):
-    """Retrieve a finder for the given path item
-
-    The returned finder is cached in sys.path_importer_cache
-    if it was newly created by a path hook.
-
-    The cache (or part of it) can be cleared manually if a
-    rescan of sys.path_hooks is necessary.
-    """
-    path_item = os.fsdecode(path_item)
-    try:
-        importer = sys.path_importer_cache[path_item]
-    except KeyError:
-        for path_hook in sys.path_hooks:
-            try:
-                importer = path_hook(path_item)
-                sys.path_importer_cache.setdefault(path_item, importer)
-                break
-            except ImportError:
-                pass
-        else:
-            importer = None
-    return importer
-
-
-def iter_importers(fullname=""):
-    """Yield finders for the given module name
-
-    If fullname contains a '.', the finders will be for the package
-    containing fullname, otherwise they will be all registered top level
-    finders (i.e. those on both sys.meta_path and sys.path_hooks).
-
-    If the named module is in a package, that package is imported as a side
-    effect of invoking this function.
-
-    If no module name is specified, all top level finders are produced.
-    """
-    if fullname.startswith('.'):
-        msg = "Relative module name {!r} not supported".format(fullname)
-        raise ImportError(msg)
-    if '.' in fullname:
-        # Get the containing package's __path__
-        pkg_name = fullname.rpartition(".")[0]
-        pkg = importlib.import_module(pkg_name)
-        path = getattr(pkg, '__path__', None)
-        if path is None:
-            return
-    else:
-        yield from sys.meta_path
-        path = sys.path
-    for item in path:
-        yield get_importer(item)
-
-
-def get_loader(module_or_name):
-    """Get a "loader" object for module_or_name
-
-    Returns None if the module cannot be found or imported.
-    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:
-            return None
-    if isinstance(module_or_name, ModuleType):
-        module = module_or_name
-        loader = getattr(module, '__loader__', None)
-        if loader is not None:
-            return loader
-        if getattr(module, '__spec__', None) is None:
-            return None
-        fullname = module.__name__
-    else:
-        fullname = module_or_name
-    return find_loader(fullname)
-
-
-def find_loader(fullname):
-    """Find a "loader" object for fullname
-
-    This is a backwards compatibility wrapper around
-    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)
-    try:
-        spec = importlib.util.find_spec(fullname)
-    except (ImportError, AttributeError, TypeError, ValueError) as ex:
-        # This hack fixes an impedance mismatch between pkgutil and
-        # importlib, where the latter raises other errors for cases where
-        # pkgutil previously raised ImportError
-        msg = "Error while finding loader for {!r} ({}: {})"
-        raise ImportError(msg.format(fullname, type(ex), ex)) from ex
-    return spec.loader if spec is not None else None
-
-
-def extend_path(path, name):
-    """Extend a package's path.
-
-    Intended use is to place the following code in a package's __init__.py:
-
-        from pkgutil import extend_path
-        __path__ = extend_path(__path__, __name__)
-
-    For each directory on sys.path that has a subdirectory that
-    matches the package name, add the subdirectory to the package's
-    __path__.  This is useful if one wants to distribute different
-    parts of a single logical package as multiple directories.
-
-    It also looks for *.pkg files beginning where * matches the name
-    argument.  This feature is similar to *.pth files (see site.py),
-    except that it doesn't special-case lines starting with 'import'.
-    A *.pkg file is trusted at face value: apart from checking for
-    duplicates, all entries found in a *.pkg file are added to the
-    path, regardless of whether they are exist the filesystem.  (This
-    is a feature.)
-
-    If the input path is not a list (as is the case for frozen
-    packages) it is returned unchanged.  The input path is not
-    modified; an extended copy is returned.  Items are only appended
-    to the copy at the end.
-
-    It is assumed that sys.path is a sequence.  Items of sys.path that
-    are not (unicode or 8-bit) strings referring to existing
-    directories are ignored.  Unicode items of sys.path that cause
-    errors when used as filenames may cause this function to raise an
-    exception (in line with os.path.isdir() behavior).
-    """
-
-    if not isinstance(path, list):
-        # This could happen e.g. when this is called from inside a
-        # frozen package.  Return the path unchanged in that case.
-        return path
-
-    sname_pkg = name + ".pkg"
-
-    path = path[:] # Start with a copy of the existing path
-
-    parent_package, _, final_name = name.rpartition('.')
-    if parent_package:
-        try:
-            search_path = sys.modules[parent_package].__path__
-        except (KeyError, AttributeError):
-            # We can't do anything: find_loader() returns None when
-            # passed a dotted name.
-            return path
-    else:
-        search_path = sys.path
-
-    for dir in search_path:
-        if not isinstance(dir, str):
-            continue
-
-        finder = get_importer(dir)
-        if finder is not None:
-            portions = []
-            if hasattr(finder, 'find_spec'):
-                spec = finder.find_spec(final_name)
-                if spec is not None:
-                    portions = spec.submodule_search_locations or []
-            # Is this finder PEP 420 compliant?
-            elif hasattr(finder, 'find_loader'):
-                _, portions = finder.find_loader(final_name)
-
-            for portion in portions:
-                # XXX This may still add duplicate entries to path on
-                # case-insensitive filesystems
-                if portion not in path:
-                    path.append(portion)
-
-        # XXX Is this the right thing for subpackages like zope.app?
-        # It looks for a file named "zope.app.pkg"
-        pkgfile = os.path.join(dir, sname_pkg)
-        if os.path.isfile(pkgfile):
-            try:
-                f = open(pkgfile)
-            except OSError as msg:
-                sys.stderr.write("Can't open %s: %s\n" %
-                                 (pkgfile, msg))
-            else:
-                with f:
-                    for line in f:
-                        line = line.rstrip('\n')
-                        if not line or line.startswith('#'):
-                            continue
-                        path.append(line) # Don't check for existence!
-
-    return path
-
-
-def get_data(package, resource):
-    """Get a resource from a package.
-
-    This is a wrapper round the PEP 302 loader get_data API. The package
-    argument should be the name of a package, in standard module format
-    (foo.bar). The resource argument should be in the form of a relative
-    filename, using '/' as the path separator. The parent directory name '..'
-    is not allowed, and nor is a rooted name (starting with a '/').
-
-    The function returns a binary string, which is the contents of the
-    specified resource.
-
-    For packages located in the filesystem, which have already been imported,
-    this is the rough equivalent of
-
-        d = os.path.dirname(sys.modules[package].__file__)
-        data = open(os.path.join(d, resource), 'rb').read()
-
-    If the package cannot be located or loaded, or it uses a PEP 302 loader
-    which does not support get_data(), then None is returned.
-    """
-
-    spec = importlib.util.find_spec(package)
-    if spec is None:
-        return None
-    loader = spec.loader
-    if loader is None or not hasattr(loader, 'get_data'):
-        return None
-    # XXX needs test
-    mod = (sys.modules.get(package) or
-           importlib._bootstrap._load(spec))
-    if mod is None or not hasattr(mod, '__file__'):
-        return None
-
-    # Modify the resource name to be compatible with the loader.get_data
-    # signature - an os.path format "filename" starting with the dirname of
-    # the package's __file__
-    parts = resource.split('/')
-    parts.insert(0, os.path.dirname(mod.__file__))
-    resource_name = os.path.join(*parts)
-    return loader.get_data(resource_name)
-
-
-_NAME_PATTERN = None
-
-def resolve_name(name):
-    """
-    Resolve a name to an object.
-
-    It is expected that `name` will be a string in one of the following
-    formats, where W is shorthand for a valid Python identifier and dot stands
-    for a literal period in these pseudo-regexes:
-
-    W(.W)*
-    W(.W)*:(W(.W)*)?
-
-    The first form is intended for backward compatibility only. It assumes that
-    some part of the dotted name is a package, and the rest is an object
-    somewhere within that package, possibly nested inside other objects.
-    Because the place where the package stops and the object hierarchy starts
-    can't be inferred by inspection, repeated attempts to import must be done
-    with this form.
-
-    In the second form, the caller makes the division point clear through the
-    provision of a single colon: the dotted name to the left of the colon is a
-    package to be imported, and the dotted name to the right is the object
-    hierarchy within that package. Only one import is needed in this form. If
-    it ends with the colon, then a module object is returned.
-
-    The function will return an object (which might be a module), or raise one
-    of the following exceptions:
-
-    ValueError - if `name` isn't in a recognised format
-    ImportError - if an import failed when it shouldn't have
-    AttributeError - if a failure occurred when traversing the object hierarchy
-                     within the imported package to get to the desired object.
-    """
-    global _NAME_PATTERN
-    if _NAME_PATTERN is None:
-        # Lazy import to speedup Python startup time
-        import re
-        dotted_words = r'(?!\d)(\w+)(\.(?!\d)(\w+))*'
-        _NAME_PATTERN = re.compile(f'^(?P<pkg>{dotted_words})'
-                                   f'(?P<cln>:(?P<obj>{dotted_words})?)?$',
-                                   re.UNICODE)
-
-    m = _NAME_PATTERN.match(name)
-    if not m:
-        raise ValueError(f'invalid format: {name!r}')
-    gd = m.groupdict()
-    if gd.get('cln'):
-        # there is a colon - a one-step import is all that's needed
-        mod = importlib.import_module(gd['pkg'])
-        parts = gd.get('obj')
-        parts = parts.split('.') if parts else []
-    else:
-        # no colon - have to iterate to find the package boundary
-        parts = name.split('.')
-        modname = parts.pop(0)
-        # first part *must* be a module/package.
-        mod = importlib.import_module(modname)
-        while parts:
-            p = parts[0]
-            s = f'{modname}.{p}'
-            try:
-                mod = importlib.import_module(s)
-                parts.pop(0)
-                modname = s
-            except ImportError:
-                break
-    # if we reach this point, mod is the module, already imported, and
-    # parts is the list of parts in the object hierarchy to be traversed, or
-    # an empty list if just the module is wanted.
-    result = mod
-    for p in parts:
-        result = getattr(result, p)
-    return result