Restoring authorship annotation for <dshmatkov@yandex-team.ru>. Commit 1 of 2.

35 files changed, 12291 insertions, 12291 deletions

diff --git a/contrib/python/boto3/ya.make b/contrib/python/boto3/ya.make
index bd12ae12b7..8b0681428f 100644
--- a/contrib/python/boto3/ya.make
+++ b/contrib/python/boto3/ya.make
@@ -6,12 +6,12 @@ VERSION(1.17.112)
 
 LICENSE(Apache-2.0)
 
-PEERDIR(
-    contrib/python/botocore
+PEERDIR( 
+    contrib/python/botocore 
     contrib/python/jmespath
     contrib/python/s3transfer
-)
-
+) 
+ 
 NO_LINT()
 
 PY_SRCS(
diff --git a/contrib/python/dateutil/README.rst b/contrib/python/dateutil/README.rst
index 106023b324..8348478725 100644
--- a/contrib/python/dateutil/README.rst
+++ b/contrib/python/dateutil/README.rst
@@ -1,168 +1,168 @@
-dateutil - powerful extensions to datetime
-==========================================
-
+dateutil - powerful extensions to datetime 
+========================================== 
+ 
 |pypi| |support| |licence|
-
-|gitter| |readthedocs|
-
+ 
+|gitter| |readthedocs| 
+ 
 |travis| |appveyor| |pipelines| |coverage|
-
-.. |pypi| image:: https://img.shields.io/pypi/v/python-dateutil.svg?style=flat-square
-    :target: https://pypi.org/project/python-dateutil/
-    :alt: pypi version
-
-.. |support| image:: https://img.shields.io/pypi/pyversions/python-dateutil.svg?style=flat-square
-    :target: https://pypi.org/project/python-dateutil/
-    :alt: supported Python version
-
-.. |travis| image:: https://img.shields.io/travis/dateutil/dateutil/master.svg?style=flat-square&label=Travis%20Build
-    :target: https://travis-ci.org/dateutil/dateutil
-    :alt: travis build status
-
-.. |appveyor| image:: https://img.shields.io/appveyor/ci/dateutil/dateutil/master.svg?style=flat-square&logo=appveyor
-    :target: https://ci.appveyor.com/project/dateutil/dateutil
-    :alt: appveyor build status
-
+ 
+.. |pypi| image:: https://img.shields.io/pypi/v/python-dateutil.svg?style=flat-square 
+    :target: https://pypi.org/project/python-dateutil/ 
+    :alt: pypi version 
+ 
+.. |support| image:: https://img.shields.io/pypi/pyversions/python-dateutil.svg?style=flat-square 
+    :target: https://pypi.org/project/python-dateutil/ 
+    :alt: supported Python version 
+ 
+.. |travis| image:: https://img.shields.io/travis/dateutil/dateutil/master.svg?style=flat-square&label=Travis%20Build 
+    :target: https://travis-ci.org/dateutil/dateutil 
+    :alt: travis build status 
+ 
+.. |appveyor| image:: https://img.shields.io/appveyor/ci/dateutil/dateutil/master.svg?style=flat-square&logo=appveyor 
+    :target: https://ci.appveyor.com/project/dateutil/dateutil 
+    :alt: appveyor build status 
+ 
 .. |pipelines| image:: https://dev.azure.com/pythondateutilazure/dateutil/_apis/build/status/dateutil.dateutil?branchName=master
     :target: https://dev.azure.com/pythondateutilazure/dateutil/_build/latest?definitionId=1&branchName=master
     :alt: azure pipelines build status
 
 .. |coverage| image:: https://codecov.io/gh/dateutil/dateutil/branch/master/graphs/badge.svg?branch=master
     :target: https://codecov.io/gh/dateutil/dateutil?branch=master
-    :alt: Code coverage
-
-.. |gitter| image:: https://badges.gitter.im/dateutil/dateutil.svg
-   :alt: Join the chat at https://gitter.im/dateutil/dateutil
-   :target: https://gitter.im/dateutil/dateutil
-
-.. |licence| image:: https://img.shields.io/pypi/l/python-dateutil.svg?style=flat-square
-    :target: https://pypi.org/project/python-dateutil/
-    :alt: licence
-
-.. |readthedocs| image:: https://img.shields.io/readthedocs/dateutil/latest.svg?style=flat-square&label=Read%20the%20Docs
-   :alt: Read the documentation at https://dateutil.readthedocs.io/en/latest/
-   :target: https://dateutil.readthedocs.io/en/latest/
-
-The `dateutil` module provides powerful extensions to
-the standard `datetime` module, available in Python.
-
+    :alt: Code coverage 
+ 
+.. |gitter| image:: https://badges.gitter.im/dateutil/dateutil.svg 
+   :alt: Join the chat at https://gitter.im/dateutil/dateutil 
+   :target: https://gitter.im/dateutil/dateutil 
+ 
+.. |licence| image:: https://img.shields.io/pypi/l/python-dateutil.svg?style=flat-square 
+    :target: https://pypi.org/project/python-dateutil/ 
+    :alt: licence 
+ 
+.. |readthedocs| image:: https://img.shields.io/readthedocs/dateutil/latest.svg?style=flat-square&label=Read%20the%20Docs 
+   :alt: Read the documentation at https://dateutil.readthedocs.io/en/latest/ 
+   :target: https://dateutil.readthedocs.io/en/latest/ 
+ 
+The `dateutil` module provides powerful extensions to 
+the standard `datetime` module, available in Python. 
+ 
 Installation
 ============
 `dateutil` can be installed from PyPI using `pip` (note that the package name is
 different from the importable name)::
-
+ 
     pip install python-dateutil
 
-Download
-========
-dateutil is available on PyPI
-https://pypi.org/project/python-dateutil/
-
-The documentation is hosted at:
-https://dateutil.readthedocs.io/en/stable/
-
-Code
-====
+Download 
+======== 
+dateutil is available on PyPI 
+https://pypi.org/project/python-dateutil/ 
+ 
+The documentation is hosted at: 
+https://dateutil.readthedocs.io/en/stable/ 
+ 
+Code 
+==== 
 The code and issue tracker are hosted on GitHub:
-https://github.com/dateutil/dateutil/
-
-Features
-========
-
-* Computing of relative deltas (next month, next year,
+https://github.com/dateutil/dateutil/ 
+ 
+Features 
+======== 
+ 
+* Computing of relative deltas (next month, next year, 
   next Monday, last week of month, etc);
-* Computing of relative deltas between two given
-  date and/or datetime objects;
-* Computing of dates based on very flexible recurrence rules,
-  using a superset of the `iCalendar <https://www.ietf.org/rfc/rfc2445.txt>`_
-  specification. Parsing of RFC strings is supported as well.
-* Generic parsing of dates in almost any string format;
-* Timezone (tzinfo) implementations for tzfile(5) format
-  files (/etc/localtime, /usr/share/zoneinfo, etc), TZ
-  environment string (in all known formats), iCalendar
-  format files, given ranges (with help from relative deltas),
-  local machine timezone, fixed offset timezone, UTC timezone,
-  and Windows registry-based time zones.
-* Internal up-to-date world timezone information based on
-  Olson's database.
-* Computing of Easter Sunday dates for any given year,
-  using Western, Orthodox or Julian algorithms;
-* A comprehensive test suite.
-
-Quick example
-=============
-Here's a snapshot, just to give an idea about the power of the
-package. For more examples, look at the documentation.
-
-Suppose you want to know how much time is left, in
-years/months/days/etc, before the next easter happening on a
-year with a Friday 13th in August, and you want to get today's
-date out of the "date" unix system command. Here is the code:
-
-.. doctest:: readmeexample
-
-    >>> from dateutil.relativedelta import *
-    >>> from dateutil.easter import *
-    >>> from dateutil.rrule import *
-    >>> from dateutil.parser import *
-    >>> from datetime import *
-    >>> now = parse("Sat Oct 11 17:13:46 UTC 2003")
-    >>> today = now.date()
-    >>> year = rrule(YEARLY,dtstart=now,bymonth=8,bymonthday=13,byweekday=FR)[0].year
-    >>> rdelta = relativedelta(easter(year), today)
-    >>> print("Today is: %s" % today)
-    Today is: 2003-10-11
-    >>> print("Year with next Aug 13th on a Friday is: %s" % year)
-    Year with next Aug 13th on a Friday is: 2004
-    >>> print("How far is the Easter of that year: %s" % rdelta)
-    How far is the Easter of that year: relativedelta(months=+6)
-    >>> print("And the Easter of that year is: %s" % (today+rdelta))
-    And the Easter of that year is: 2004-04-11
-
-Being exactly 6 months ahead was **really** a coincidence :)
-
-Contributing
-============
-
-We welcome many types of contributions - bug reports, pull requests (code, infrastructure or documentation fixes). For more information about how to contribute to the project, see the ``CONTRIBUTING.md`` file in the repository.
-
-
-Author
-======
-The dateutil module was written by Gustavo Niemeyer <gustavo@niemeyer.net>
-in 2003.
-
-It is maintained by:
-
-* Gustavo Niemeyer <gustavo@niemeyer.net> 2003-2011
-* Tomi Pieviläinen <tomi.pievilainen@iki.fi> 2012-2014
-* Yaron de Leeuw <me@jarondl.net> 2014-2016
-* Paul Ganssle <paul@ganssle.io> 2015-
-
+* Computing of relative deltas between two given 
+  date and/or datetime objects; 
+* Computing of dates based on very flexible recurrence rules, 
+  using a superset of the `iCalendar <https://www.ietf.org/rfc/rfc2445.txt>`_ 
+  specification. Parsing of RFC strings is supported as well. 
+* Generic parsing of dates in almost any string format; 
+* Timezone (tzinfo) implementations for tzfile(5) format 
+  files (/etc/localtime, /usr/share/zoneinfo, etc), TZ 
+  environment string (in all known formats), iCalendar 
+  format files, given ranges (with help from relative deltas), 
+  local machine timezone, fixed offset timezone, UTC timezone, 
+  and Windows registry-based time zones. 
+* Internal up-to-date world timezone information based on 
+  Olson's database. 
+* Computing of Easter Sunday dates for any given year, 
+  using Western, Orthodox or Julian algorithms; 
+* A comprehensive test suite. 
+ 
+Quick example 
+============= 
+Here's a snapshot, just to give an idea about the power of the 
+package. For more examples, look at the documentation. 
+ 
+Suppose you want to know how much time is left, in 
+years/months/days/etc, before the next easter happening on a 
+year with a Friday 13th in August, and you want to get today's 
+date out of the "date" unix system command. Here is the code: 
+ 
+.. doctest:: readmeexample 
+ 
+    >>> from dateutil.relativedelta import * 
+    >>> from dateutil.easter import * 
+    >>> from dateutil.rrule import * 
+    >>> from dateutil.parser import * 
+    >>> from datetime import * 
+    >>> now = parse("Sat Oct 11 17:13:46 UTC 2003") 
+    >>> today = now.date() 
+    >>> year = rrule(YEARLY,dtstart=now,bymonth=8,bymonthday=13,byweekday=FR)[0].year 
+    >>> rdelta = relativedelta(easter(year), today) 
+    >>> print("Today is: %s" % today) 
+    Today is: 2003-10-11 
+    >>> print("Year with next Aug 13th on a Friday is: %s" % year) 
+    Year with next Aug 13th on a Friday is: 2004 
+    >>> print("How far is the Easter of that year: %s" % rdelta) 
+    How far is the Easter of that year: relativedelta(months=+6) 
+    >>> print("And the Easter of that year is: %s" % (today+rdelta)) 
+    And the Easter of that year is: 2004-04-11 
+ 
+Being exactly 6 months ahead was **really** a coincidence :) 
+ 
+Contributing 
+============ 
+ 
+We welcome many types of contributions - bug reports, pull requests (code, infrastructure or documentation fixes). For more information about how to contribute to the project, see the ``CONTRIBUTING.md`` file in the repository. 
+ 
+ 
+Author 
+====== 
+The dateutil module was written by Gustavo Niemeyer <gustavo@niemeyer.net> 
+in 2003. 
+ 
+It is maintained by: 
+ 
+* Gustavo Niemeyer <gustavo@niemeyer.net> 2003-2011 
+* Tomi Pieviläinen <tomi.pievilainen@iki.fi> 2012-2014 
+* Yaron de Leeuw <me@jarondl.net> 2014-2016 
+* Paul Ganssle <paul@ganssle.io> 2015- 
+ 
 Starting with version 2.4.1 and running until 2.8.2, all source and binary
 distributions will be signed by a PGP key that has, at the very least, been
 signed by the key which made the previous release. A table of release signing
 keys can be found below:
-
-===========  ============================
-Releases     Signing key fingerprint
-===========  ============================
+ 
+===========  ============================ 
+Releases     Signing key fingerprint 
+===========  ============================ 
 2.4.1-2.8.2  `6B49 ACBA DCF6 BD1C A206 67AB CD54 FCE3 D964 BEFB`_ 
-===========  ============================
-
+===========  ============================ 
+ 
 New releases *may* have signed tags, but binary and source distributions
 uploaded to PyPI will no longer have GPG signatures attached.
-
-Contact
-=======
-Our mailing list is available at `dateutil@python.org <https://mail.python.org/mailman/listinfo/dateutil>`_. As it is hosted by the PSF, it is subject to the `PSF code of
+ 
+Contact 
+======= 
+Our mailing list is available at `dateutil@python.org <https://mail.python.org/mailman/listinfo/dateutil>`_. As it is hosted by the PSF, it is subject to the `PSF code of 
 conduct <https://www.python.org/psf/conduct/>`_.
-
-License
-=======
-
-All contributions after December 1, 2017 released under dual license - either `Apache 2.0 License <https://www.apache.org/licenses/LICENSE-2.0>`_ or the `BSD 3-Clause License <https://opensource.org/licenses/BSD-3-Clause>`_. Contributions before December 1, 2017 - except those those explicitly relicensed - are released only under the BSD 3-Clause License.
-
-
-.. _6B49 ACBA DCF6 BD1C A206 67AB CD54 FCE3 D964 BEFB:
-   https://pgp.mit.edu/pks/lookup?op=vindex&search=0xCD54FCE3D964BEFB
+ 
+License 
+======= 
+ 
+All contributions after December 1, 2017 released under dual license - either `Apache 2.0 License <https://www.apache.org/licenses/LICENSE-2.0>`_ or the `BSD 3-Clause License <https://opensource.org/licenses/BSD-3-Clause>`_. Contributions before December 1, 2017 - except those those explicitly relicensed - are released only under the BSD 3-Clause License. 
+ 
+ 
+.. _6B49 ACBA DCF6 BD1C A206 67AB CD54 FCE3 D964 BEFB: 
+   https://pgp.mit.edu/pks/lookup?op=vindex&search=0xCD54FCE3D964BEFB 
diff --git a/contrib/python/dateutil/dateutil/__init__.py b/contrib/python/dateutil/dateutil/__init__.py
index 0defb82e21..f0bc8352db 100644
--- a/contrib/python/dateutil/dateutil/__init__.py
+++ b/contrib/python/dateutil/dateutil/__init__.py
@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
-try:
-    from ._version import version as __version__
-except ImportError:
-    __version__ = 'unknown'
-
-__all__ = ['easter', 'parser', 'relativedelta', 'rrule', 'tz',
-           'utils', 'zoneinfo']
+try: 
+    from ._version import version as __version__ 
+except ImportError: 
+    __version__ = 'unknown' 
+ 
+__all__ = ['easter', 'parser', 'relativedelta', 'rrule', 'tz', 
+           'utils', 'zoneinfo'] 
diff --git a/contrib/python/dateutil/dateutil/_common.py b/contrib/python/dateutil/dateutil/_common.py
index 4eb2659bd2..30cc3f7520 100644
--- a/contrib/python/dateutil/dateutil/_common.py
+++ b/contrib/python/dateutil/dateutil/_common.py
@@ -24,20 +24,20 @@ class weekday(object):
             return False
         return True
 
-    def __hash__(self):
-        return hash((
-          self.weekday,
-          self.n,
-        ))
-
-    def __ne__(self, other):
-        return not (self == other)
-
+    def __hash__(self): 
+        return hash(( 
+          self.weekday, 
+          self.n, 
+        )) 
+
+    def __ne__(self, other): 
+        return not (self == other) 
+ 
     def __repr__(self):
         s = ("MO", "TU", "WE", "TH", "FR", "SA", "SU")[self.weekday]
         if not self.n:
             return s
         else:
             return "%s(%+d)" % (s, self.n)
-
-# vim:ts=4:sw=4:et
+ 
+# vim:ts=4:sw=4:et 
diff --git a/contrib/python/dateutil/dateutil/easter.py b/contrib/python/dateutil/dateutil/easter.py
index f74d1f7442..14a16edbf9 100644
--- a/contrib/python/dateutil/dateutil/easter.py
+++ b/contrib/python/dateutil/dateutil/easter.py
@@ -41,11 +41,11 @@ def easter(year, method=EASTER_WESTERN):
 
     More about the algorithm may be found at:
 
-    `GM Arts: Easter Algorithms <http://www.gmarts.org/index.php?go=415>`_
+    `GM Arts: Easter Algorithms <http://www.gmarts.org/index.php?go=415>`_ 
 
     and
 
-    `The Calendar FAQ: Easter <https://www.tondering.dk/claus/cal/easter.php>`_
+    `The Calendar FAQ: Easter <https://www.tondering.dk/claus/cal/easter.php>`_ 
 
     """
 
diff --git a/contrib/python/dateutil/dateutil/parser/__init__.py b/contrib/python/dateutil/dateutil/parser/__init__.py
index d174b0e4dc..cda37f1a69 100644
--- a/contrib/python/dateutil/dateutil/parser/__init__.py
+++ b/contrib/python/dateutil/dateutil/parser/__init__.py
@@ -1,61 +1,61 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*- 
 from ._parser import parse, parser, parserinfo, ParserError
-from ._parser import DEFAULTPARSER, DEFAULTTZPARSER
-from ._parser import UnknownTimezoneWarning
-
-from ._parser import __doc__
-
-from .isoparser import isoparser, isoparse
-
-__all__ = ['parse', 'parser', 'parserinfo',
-           'isoparse', 'isoparser',
+from ._parser import DEFAULTPARSER, DEFAULTTZPARSER 
+from ._parser import UnknownTimezoneWarning 
+ 
+from ._parser import __doc__ 
+ 
+from .isoparser import isoparser, isoparse 
+ 
+__all__ = ['parse', 'parser', 'parserinfo', 
+           'isoparse', 'isoparser', 
            'ParserError',
-           'UnknownTimezoneWarning']
-
-
-###
-# Deprecate portions of the private interface so that downstream code that
-# is improperly relying on it is given *some* notice.
-
-
-def __deprecated_private_func(f):
-    from functools import wraps
-    import warnings
-
-    msg = ('{name} is a private function and may break without warning, '
-           'it will be moved and or renamed in future versions.')
-    msg = msg.format(name=f.__name__)
-
-    @wraps(f)
-    def deprecated_func(*args, **kwargs):
-        warnings.warn(msg, DeprecationWarning)
-        return f(*args, **kwargs)
-
-    return deprecated_func
-
-def __deprecate_private_class(c):
-    import warnings
-
-    msg = ('{name} is a private class and may break without warning, '
-           'it will be moved and or renamed in future versions.')
-    msg = msg.format(name=c.__name__)
-
-    class private_class(c):
-        __doc__ = c.__doc__
-
-        def __init__(self, *args, **kwargs):
-            warnings.warn(msg, DeprecationWarning)
-            super(private_class, self).__init__(*args, **kwargs)
-
-    private_class.__name__ = c.__name__
-
-    return private_class
-
-
+           'UnknownTimezoneWarning'] 
+ 
+ 
+### 
+# Deprecate portions of the private interface so that downstream code that 
+# is improperly relying on it is given *some* notice. 
+ 
+ 
+def __deprecated_private_func(f): 
+    from functools import wraps 
+    import warnings 
+ 
+    msg = ('{name} is a private function and may break without warning, ' 
+           'it will be moved and or renamed in future versions.') 
+    msg = msg.format(name=f.__name__) 
+ 
+    @wraps(f) 
+    def deprecated_func(*args, **kwargs): 
+        warnings.warn(msg, DeprecationWarning) 
+        return f(*args, **kwargs) 
+ 
+    return deprecated_func 
+ 
+def __deprecate_private_class(c): 
+    import warnings 
+ 
+    msg = ('{name} is a private class and may break without warning, ' 
+           'it will be moved and or renamed in future versions.') 
+    msg = msg.format(name=c.__name__) 
+ 
+    class private_class(c): 
+        __doc__ = c.__doc__ 
+ 
+        def __init__(self, *args, **kwargs): 
+            warnings.warn(msg, DeprecationWarning) 
+            super(private_class, self).__init__(*args, **kwargs) 
+ 
+    private_class.__name__ = c.__name__ 
+ 
+    return private_class 
+ 
+ 
 from ._parser import _timelex, _resultbase
 from ._parser import _tzparser, _parsetz
-
-_timelex = __deprecate_private_class(_timelex)
-_tzparser = __deprecate_private_class(_tzparser)
-_resultbase = __deprecate_private_class(_resultbase)
-_parsetz = __deprecated_private_func(_parsetz)
+ 
+_timelex = __deprecate_private_class(_timelex) 
+_tzparser = __deprecate_private_class(_tzparser) 
+_resultbase = __deprecate_private_class(_resultbase) 
+_parsetz = __deprecated_private_func(_parsetz) 
diff --git a/contrib/python/dateutil/dateutil/parser/_parser.py b/contrib/python/dateutil/dateutil/parser/_parser.py
index 37d1663b2f..fa81f84093 100644
--- a/contrib/python/dateutil/dateutil/parser/_parser.py
+++ b/contrib/python/dateutil/dateutil/parser/_parser.py
@@ -1,1135 +1,1135 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers a generic date/time string parser which is able to parse
-most known formats to represent a date and/or time.
-
-This module attempts to be forgiving with regards to unlikely input formats,
-returning a datetime object even for dates which are ambiguous. If an element
-of a date/time stamp is omitted, the following rules are applied:
-
-- If AM or PM is left unspecified, a 24-hour clock is assumed, however, an hour
-  on a 12-hour clock (``0 <= hour <= 12``) *must* be specified if AM or PM is
-  specified.
-- If a time zone is omitted, a timezone-naive datetime is returned.
-
-If any other elements are missing, they are taken from the
-:class:`datetime.datetime` object passed to the parameter ``default``. If this
-results in a day number exceeding the valid number of days per month, the
-value falls back to the end of the month.
-
-Additional resources about date/time string formats can be found below:
-
-- `A summary of the international standard date and time notation
+# -*- coding: utf-8 -*- 
+""" 
+This module offers a generic date/time string parser which is able to parse 
+most known formats to represent a date and/or time. 
+ 
+This module attempts to be forgiving with regards to unlikely input formats, 
+returning a datetime object even for dates which are ambiguous. If an element 
+of a date/time stamp is omitted, the following rules are applied: 
+ 
+- If AM or PM is left unspecified, a 24-hour clock is assumed, however, an hour 
+  on a 12-hour clock (``0 <= hour <= 12``) *must* be specified if AM or PM is 
+  specified. 
+- If a time zone is omitted, a timezone-naive datetime is returned. 
+ 
+If any other elements are missing, they are taken from the 
+:class:`datetime.datetime` object passed to the parameter ``default``. If this 
+results in a day number exceeding the valid number of days per month, the 
+value falls back to the end of the month. 
+ 
+Additional resources about date/time string formats can be found below: 
+ 
+- `A summary of the international standard date and time notation 
   <https://www.cl.cam.ac.uk/~mgk25/iso-time.html>`_
 - `W3C Date and Time Formats <https://www.w3.org/TR/NOTE-datetime>`_
-- `Time Formats (Planetary Rings Node) <https://pds-rings.seti.org:443/tools/time_formats.html>`_
-- `CPAN ParseDate module
+- `Time Formats (Planetary Rings Node) <https://pds-rings.seti.org:443/tools/time_formats.html>`_ 
+- `CPAN ParseDate module 
   <https://metacpan.org/pod/release/MUIR/Time-modules-2013.0912/lib/Time/ParseDate.pm>`_
-- `Java SimpleDateFormat Class
-  <https://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html>`_
-"""
-from __future__ import unicode_literals
-
-import datetime
-import re
-import string
-import time
-import warnings
-
-from calendar import monthrange
-from io import StringIO
-
-import six
+- `Java SimpleDateFormat Class 
+  <https://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html>`_ 
+""" 
+from __future__ import unicode_literals 
+ 
+import datetime 
+import re 
+import string 
+import time 
+import warnings 
+ 
+from calendar import monthrange 
+from io import StringIO 
+ 
+import six 
 from six import integer_types, text_type
-
-from decimal import Decimal
-
-from warnings import warn
-
-from .. import relativedelta
-from .. import tz
-
+ 
+from decimal import Decimal 
+ 
+from warnings import warn 
+ 
+from .. import relativedelta 
+from .. import tz 
+ 
 __all__ = ["parse", "parserinfo", "ParserError"]
-
-
-# TODO: pandas.core.tools.datetimes imports this explicitly.  Might be worth
-# making public and/or figuring out if there is something we can
-# take off their plate.
-class _timelex(object):
-    # Fractional seconds are sometimes split by a comma
-    _split_decimal = re.compile("([.,])")
-
-    def __init__(self, instream):
+ 
+ 
+# TODO: pandas.core.tools.datetimes imports this explicitly.  Might be worth 
+# making public and/or figuring out if there is something we can 
+# take off their plate. 
+class _timelex(object): 
+    # Fractional seconds are sometimes split by a comma 
+    _split_decimal = re.compile("([.,])") 
+ 
+    def __init__(self, instream): 
         if isinstance(instream, (bytes, bytearray)):
             instream = instream.decode()
-
-        if isinstance(instream, text_type):
-            instream = StringIO(instream)
-        elif getattr(instream, 'read', None) is None:
-            raise TypeError('Parser must be a string or character stream, not '
-                            '{itype}'.format(itype=instream.__class__.__name__))
-
-        self.instream = instream
-        self.charstack = []
-        self.tokenstack = []
-        self.eof = False
-
-    def get_token(self):
-        """
-        This function breaks the time string into lexical units (tokens), which
-        can be parsed by the parser. Lexical units are demarcated by changes in
-        the character set, so any continuous string of letters is considered
-        one unit, any continuous string of numbers is considered one unit.
-
-        The main complication arises from the fact that dots ('.') can be used
-        both as separators (e.g. "Sep.20.2009") or decimal points (e.g.
-        "4:30:21.447"). As such, it is necessary to read the full context of
-        any dot-separated strings before breaking it into tokens; as such, this
-        function maintains a "token stack", for when the ambiguous context
-        demands that multiple tokens be parsed at once.
-        """
-        if self.tokenstack:
-            return self.tokenstack.pop(0)
-
-        seenletters = False
-        token = None
-        state = None
-
-        while not self.eof:
-            # We only realize that we've reached the end of a token when we
-            # find a character that's not part of the current token - since
-            # that character may be part of the next token, it's stored in the
-            # charstack.
-            if self.charstack:
-                nextchar = self.charstack.pop(0)
-            else:
-                nextchar = self.instream.read(1)
-                while nextchar == '\x00':
-                    nextchar = self.instream.read(1)
-
-            if not nextchar:
-                self.eof = True
-                break
-            elif not state:
-                # First character of the token - determines if we're starting
-                # to parse a word, a number or something else.
-                token = nextchar
-                if self.isword(nextchar):
-                    state = 'a'
-                elif self.isnum(nextchar):
-                    state = '0'
-                elif self.isspace(nextchar):
-                    token = ' '
-                    break  # emit token
-                else:
-                    break  # emit token
-            elif state == 'a':
-                # If we've already started reading a word, we keep reading
-                # letters until we find something that's not part of a word.
-                seenletters = True
-                if self.isword(nextchar):
-                    token += nextchar
-                elif nextchar == '.':
-                    token += nextchar
-                    state = 'a.'
-                else:
-                    self.charstack.append(nextchar)
-                    break  # emit token
-            elif state == '0':
-                # If we've already started reading a number, we keep reading
-                # numbers until we find something that doesn't fit.
-                if self.isnum(nextchar):
-                    token += nextchar
-                elif nextchar == '.' or (nextchar == ',' and len(token) >= 2):
-                    token += nextchar
-                    state = '0.'
-                else:
-                    self.charstack.append(nextchar)
-                    break  # emit token
-            elif state == 'a.':
-                # If we've seen some letters and a dot separator, continue
-                # parsing, and the tokens will be broken up later.
-                seenletters = True
-                if nextchar == '.' or self.isword(nextchar):
-                    token += nextchar
-                elif self.isnum(nextchar) and token[-1] == '.':
-                    token += nextchar
-                    state = '0.'
-                else:
-                    self.charstack.append(nextchar)
-                    break  # emit token
-            elif state == '0.':
-                # If we've seen at least one dot separator, keep going, we'll
-                # break up the tokens later.
-                if nextchar == '.' or self.isnum(nextchar):
-                    token += nextchar
-                elif self.isword(nextchar) and token[-1] == '.':
-                    token += nextchar
-                    state = 'a.'
-                else:
-                    self.charstack.append(nextchar)
-                    break  # emit token
-
-        if (state in ('a.', '0.') and (seenletters or token.count('.') > 1 or
-                                       token[-1] in '.,')):
-            l = self._split_decimal.split(token)
-            token = l[0]
-            for tok in l[1:]:
-                if tok:
-                    self.tokenstack.append(tok)
-
-        if state == '0.' and token.count('.') == 0:
-            token = token.replace(',', '.')
-
-        return token
-
-    def __iter__(self):
-        return self
-
-    def __next__(self):
-        token = self.get_token()
-        if token is None:
-            raise StopIteration
-
-        return token
-
-    def next(self):
-        return self.__next__()  # Python 2.x support
-
-    @classmethod
-    def split(cls, s):
-        return list(cls(s))
-
-    @classmethod
-    def isword(cls, nextchar):
-        """ Whether or not the next character is part of a word """
-        return nextchar.isalpha()
-
-    @classmethod
-    def isnum(cls, nextchar):
-        """ Whether the next character is part of a number """
-        return nextchar.isdigit()
-
-    @classmethod
-    def isspace(cls, nextchar):
-        """ Whether the next character is whitespace """
-        return nextchar.isspace()
-
-
-class _resultbase(object):
-
-    def __init__(self):
-        for attr in self.__slots__:
-            setattr(self, attr, None)
-
-    def _repr(self, classname):
-        l = []
-        for attr in self.__slots__:
-            value = getattr(self, attr)
-            if value is not None:
-                l.append("%s=%s" % (attr, repr(value)))
-        return "%s(%s)" % (classname, ", ".join(l))
-
-    def __len__(self):
-        return (sum(getattr(self, attr) is not None
-                    for attr in self.__slots__))
-
-    def __repr__(self):
-        return self._repr(self.__class__.__name__)
-
-
-class parserinfo(object):
-    """
-    Class which handles what inputs are accepted. Subclass this to customize
-    the language and acceptable values for each parameter.
-
-    :param dayfirst:
-        Whether to interpret the first value in an ambiguous 3-integer date
-        (e.g. 01/05/09) as the day (``True``) or month (``False``). If
-        ``yearfirst`` is set to ``True``, this distinguishes between YDM
-        and YMD. Default is ``False``.
-
-    :param yearfirst:
-        Whether to interpret the first value in an ambiguous 3-integer date
-        (e.g. 01/05/09) as the year. If ``True``, the first number is taken
-        to be the year, otherwise the last number is taken to be the year.
-        Default is ``False``.
-    """
-
-    # m from a.m/p.m, t from ISO T separator
-    JUMP = [" ", ".", ",", ";", "-", "/", "'",
-            "at", "on", "and", "ad", "m", "t", "of",
-            "st", "nd", "rd", "th"]
-
-    WEEKDAYS = [("Mon", "Monday"),
-                ("Tue", "Tuesday"),     # TODO: "Tues"
-                ("Wed", "Wednesday"),
-                ("Thu", "Thursday"),    # TODO: "Thurs"
-                ("Fri", "Friday"),
-                ("Sat", "Saturday"),
-                ("Sun", "Sunday")]
-    MONTHS = [("Jan", "January"),
-              ("Feb", "February"),      # TODO: "Febr"
-              ("Mar", "March"),
-              ("Apr", "April"),
-              ("May", "May"),
-              ("Jun", "June"),
-              ("Jul", "July"),
-              ("Aug", "August"),
-              ("Sep", "Sept", "September"),
-              ("Oct", "October"),
-              ("Nov", "November"),
-              ("Dec", "December")]
-    HMS = [("h", "hour", "hours"),
-           ("m", "minute", "minutes"),
-           ("s", "second", "seconds")]
-    AMPM = [("am", "a"),
-            ("pm", "p")]
+ 
+        if isinstance(instream, text_type): 
+            instream = StringIO(instream) 
+        elif getattr(instream, 'read', None) is None: 
+            raise TypeError('Parser must be a string or character stream, not ' 
+                            '{itype}'.format(itype=instream.__class__.__name__)) 
+ 
+        self.instream = instream 
+        self.charstack = [] 
+        self.tokenstack = [] 
+        self.eof = False 
+ 
+    def get_token(self): 
+        """ 
+        This function breaks the time string into lexical units (tokens), which 
+        can be parsed by the parser. Lexical units are demarcated by changes in 
+        the character set, so any continuous string of letters is considered 
+        one unit, any continuous string of numbers is considered one unit. 
+ 
+        The main complication arises from the fact that dots ('.') can be used 
+        both as separators (e.g. "Sep.20.2009") or decimal points (e.g. 
+        "4:30:21.447"). As such, it is necessary to read the full context of 
+        any dot-separated strings before breaking it into tokens; as such, this 
+        function maintains a "token stack", for when the ambiguous context 
+        demands that multiple tokens be parsed at once. 
+        """ 
+        if self.tokenstack: 
+            return self.tokenstack.pop(0) 
+ 
+        seenletters = False 
+        token = None 
+        state = None 
+ 
+        while not self.eof: 
+            # We only realize that we've reached the end of a token when we 
+            # find a character that's not part of the current token - since 
+            # that character may be part of the next token, it's stored in the 
+            # charstack. 
+            if self.charstack: 
+                nextchar = self.charstack.pop(0) 
+            else: 
+                nextchar = self.instream.read(1) 
+                while nextchar == '\x00': 
+                    nextchar = self.instream.read(1) 
+ 
+            if not nextchar: 
+                self.eof = True 
+                break 
+            elif not state: 
+                # First character of the token - determines if we're starting 
+                # to parse a word, a number or something else. 
+                token = nextchar 
+                if self.isword(nextchar): 
+                    state = 'a' 
+                elif self.isnum(nextchar): 
+                    state = '0' 
+                elif self.isspace(nextchar): 
+                    token = ' ' 
+                    break  # emit token 
+                else: 
+                    break  # emit token 
+            elif state == 'a': 
+                # If we've already started reading a word, we keep reading 
+                # letters until we find something that's not part of a word. 
+                seenletters = True 
+                if self.isword(nextchar): 
+                    token += nextchar 
+                elif nextchar == '.': 
+                    token += nextchar 
+                    state = 'a.' 
+                else: 
+                    self.charstack.append(nextchar) 
+                    break  # emit token 
+            elif state == '0': 
+                # If we've already started reading a number, we keep reading 
+                # numbers until we find something that doesn't fit. 
+                if self.isnum(nextchar): 
+                    token += nextchar 
+                elif nextchar == '.' or (nextchar == ',' and len(token) >= 2): 
+                    token += nextchar 
+                    state = '0.' 
+                else: 
+                    self.charstack.append(nextchar) 
+                    break  # emit token 
+            elif state == 'a.': 
+                # If we've seen some letters and a dot separator, continue 
+                # parsing, and the tokens will be broken up later. 
+                seenletters = True 
+                if nextchar == '.' or self.isword(nextchar): 
+                    token += nextchar 
+                elif self.isnum(nextchar) and token[-1] == '.': 
+                    token += nextchar 
+                    state = '0.' 
+                else: 
+                    self.charstack.append(nextchar) 
+                    break  # emit token 
+            elif state == '0.': 
+                # If we've seen at least one dot separator, keep going, we'll 
+                # break up the tokens later. 
+                if nextchar == '.' or self.isnum(nextchar): 
+                    token += nextchar 
+                elif self.isword(nextchar) and token[-1] == '.': 
+                    token += nextchar 
+                    state = 'a.' 
+                else: 
+                    self.charstack.append(nextchar) 
+                    break  # emit token 
+ 
+        if (state in ('a.', '0.') and (seenletters or token.count('.') > 1 or 
+                                       token[-1] in '.,')): 
+            l = self._split_decimal.split(token) 
+            token = l[0] 
+            for tok in l[1:]: 
+                if tok: 
+                    self.tokenstack.append(tok) 
+ 
+        if state == '0.' and token.count('.') == 0: 
+            token = token.replace(',', '.') 
+ 
+        return token 
+ 
+    def __iter__(self): 
+        return self 
+ 
+    def __next__(self): 
+        token = self.get_token() 
+        if token is None: 
+            raise StopIteration 
+ 
+        return token 
+ 
+    def next(self): 
+        return self.__next__()  # Python 2.x support 
+ 
+    @classmethod 
+    def split(cls, s): 
+        return list(cls(s)) 
+ 
+    @classmethod 
+    def isword(cls, nextchar): 
+        """ Whether or not the next character is part of a word """ 
+        return nextchar.isalpha() 
+ 
+    @classmethod 
+    def isnum(cls, nextchar): 
+        """ Whether the next character is part of a number """ 
+        return nextchar.isdigit() 
+ 
+    @classmethod 
+    def isspace(cls, nextchar): 
+        """ Whether the next character is whitespace """ 
+        return nextchar.isspace() 
+ 
+ 
+class _resultbase(object): 
+ 
+    def __init__(self): 
+        for attr in self.__slots__: 
+            setattr(self, attr, None) 
+ 
+    def _repr(self, classname): 
+        l = [] 
+        for attr in self.__slots__: 
+            value = getattr(self, attr) 
+            if value is not None: 
+                l.append("%s=%s" % (attr, repr(value))) 
+        return "%s(%s)" % (classname, ", ".join(l)) 
+ 
+    def __len__(self): 
+        return (sum(getattr(self, attr) is not None 
+                    for attr in self.__slots__)) 
+ 
+    def __repr__(self): 
+        return self._repr(self.__class__.__name__) 
+ 
+ 
+class parserinfo(object): 
+    """ 
+    Class which handles what inputs are accepted. Subclass this to customize 
+    the language and acceptable values for each parameter. 
+ 
+    :param dayfirst: 
+        Whether to interpret the first value in an ambiguous 3-integer date 
+        (e.g. 01/05/09) as the day (``True``) or month (``False``). If 
+        ``yearfirst`` is set to ``True``, this distinguishes between YDM 
+        and YMD. Default is ``False``. 
+ 
+    :param yearfirst: 
+        Whether to interpret the first value in an ambiguous 3-integer date 
+        (e.g. 01/05/09) as the year. If ``True``, the first number is taken 
+        to be the year, otherwise the last number is taken to be the year. 
+        Default is ``False``. 
+    """ 
+ 
+    # m from a.m/p.m, t from ISO T separator 
+    JUMP = [" ", ".", ",", ";", "-", "/", "'", 
+            "at", "on", "and", "ad", "m", "t", "of", 
+            "st", "nd", "rd", "th"] 
+ 
+    WEEKDAYS = [("Mon", "Monday"), 
+                ("Tue", "Tuesday"),     # TODO: "Tues" 
+                ("Wed", "Wednesday"), 
+                ("Thu", "Thursday"),    # TODO: "Thurs" 
+                ("Fri", "Friday"), 
+                ("Sat", "Saturday"), 
+                ("Sun", "Sunday")] 
+    MONTHS = [("Jan", "January"), 
+              ("Feb", "February"),      # TODO: "Febr" 
+              ("Mar", "March"), 
+              ("Apr", "April"), 
+              ("May", "May"), 
+              ("Jun", "June"), 
+              ("Jul", "July"), 
+              ("Aug", "August"), 
+              ("Sep", "Sept", "September"), 
+              ("Oct", "October"), 
+              ("Nov", "November"), 
+              ("Dec", "December")] 
+    HMS = [("h", "hour", "hours"), 
+           ("m", "minute", "minutes"), 
+           ("s", "second", "seconds")] 
+    AMPM = [("am", "a"), 
+            ("pm", "p")] 
     UTCZONE = ["UTC", "GMT", "Z", "z"]
-    PERTAIN = ["of"]
-    TZOFFSET = {}
-    # TODO: ERA = ["AD", "BC", "CE", "BCE", "Stardate",
-    #              "Anno Domini", "Year of Our Lord"]
-
-    def __init__(self, dayfirst=False, yearfirst=False):
-        self._jump = self._convert(self.JUMP)
-        self._weekdays = self._convert(self.WEEKDAYS)
-        self._months = self._convert(self.MONTHS)
-        self._hms = self._convert(self.HMS)
-        self._ampm = self._convert(self.AMPM)
-        self._utczone = self._convert(self.UTCZONE)
-        self._pertain = self._convert(self.PERTAIN)
-
-        self.dayfirst = dayfirst
-        self.yearfirst = yearfirst
-
-        self._year = time.localtime().tm_year
-        self._century = self._year // 100 * 100
-
-    def _convert(self, lst):
-        dct = {}
-        for i, v in enumerate(lst):
-            if isinstance(v, tuple):
-                for v in v:
-                    dct[v.lower()] = i
-            else:
-                dct[v.lower()] = i
-        return dct
-
-    def jump(self, name):
-        return name.lower() in self._jump
-
-    def weekday(self, name):
-        try:
-            return self._weekdays[name.lower()]
-        except KeyError:
-            pass
-        return None
-
-    def month(self, name):
-        try:
-            return self._months[name.lower()] + 1
-        except KeyError:
-            pass
-        return None
-
-    def hms(self, name):
-        try:
-            return self._hms[name.lower()]
-        except KeyError:
-            return None
-
-    def ampm(self, name):
-        try:
-            return self._ampm[name.lower()]
-        except KeyError:
-            return None
-
-    def pertain(self, name):
-        return name.lower() in self._pertain
-
-    def utczone(self, name):
-        return name.lower() in self._utczone
-
-    def tzoffset(self, name):
-        if name in self._utczone:
-            return 0
-
-        return self.TZOFFSET.get(name)
-
-    def convertyear(self, year, century_specified=False):
-        """
-        Converts two-digit years to year within [-50, 49]
-        range of self._year (current local time)
-        """
-
-        # Function contract is that the year is always positive
-        assert year >= 0
-
-        if year < 100 and not century_specified:
-            # assume current century to start
-            year += self._century
-
-            if year >= self._year + 50:  # if too far in future
-                year -= 100
-            elif year < self._year - 50:  # if too far in past
-                year += 100
-
-        return year
-
-    def validate(self, res):
-        # move to info
-        if res.year is not None:
-            res.year = self.convertyear(res.year, res.century_specified)
-
+    PERTAIN = ["of"] 
+    TZOFFSET = {} 
+    # TODO: ERA = ["AD", "BC", "CE", "BCE", "Stardate", 
+    #              "Anno Domini", "Year of Our Lord"] 
+ 
+    def __init__(self, dayfirst=False, yearfirst=False): 
+        self._jump = self._convert(self.JUMP) 
+        self._weekdays = self._convert(self.WEEKDAYS) 
+        self._months = self._convert(self.MONTHS) 
+        self._hms = self._convert(self.HMS) 
+        self._ampm = self._convert(self.AMPM) 
+        self._utczone = self._convert(self.UTCZONE) 
+        self._pertain = self._convert(self.PERTAIN) 
+ 
+        self.dayfirst = dayfirst 
+        self.yearfirst = yearfirst 
+ 
+        self._year = time.localtime().tm_year 
+        self._century = self._year // 100 * 100 
+ 
+    def _convert(self, lst): 
+        dct = {} 
+        for i, v in enumerate(lst): 
+            if isinstance(v, tuple): 
+                for v in v: 
+                    dct[v.lower()] = i 
+            else: 
+                dct[v.lower()] = i 
+        return dct 
+ 
+    def jump(self, name): 
+        return name.lower() in self._jump 
+ 
+    def weekday(self, name): 
+        try: 
+            return self._weekdays[name.lower()] 
+        except KeyError: 
+            pass 
+        return None 
+ 
+    def month(self, name): 
+        try: 
+            return self._months[name.lower()] + 1 
+        except KeyError: 
+            pass 
+        return None 
+ 
+    def hms(self, name): 
+        try: 
+            return self._hms[name.lower()] 
+        except KeyError: 
+            return None 
+ 
+    def ampm(self, name): 
+        try: 
+            return self._ampm[name.lower()] 
+        except KeyError: 
+            return None 
+ 
+    def pertain(self, name): 
+        return name.lower() in self._pertain 
+ 
+    def utczone(self, name): 
+        return name.lower() in self._utczone 
+ 
+    def tzoffset(self, name): 
+        if name in self._utczone: 
+            return 0 
+ 
+        return self.TZOFFSET.get(name) 
+ 
+    def convertyear(self, year, century_specified=False): 
+        """ 
+        Converts two-digit years to year within [-50, 49] 
+        range of self._year (current local time) 
+        """ 
+ 
+        # Function contract is that the year is always positive 
+        assert year >= 0 
+ 
+        if year < 100 and not century_specified: 
+            # assume current century to start 
+            year += self._century 
+ 
+            if year >= self._year + 50:  # if too far in future 
+                year -= 100 
+            elif year < self._year - 50:  # if too far in past 
+                year += 100 
+ 
+        return year 
+ 
+    def validate(self, res): 
+        # move to info 
+        if res.year is not None: 
+            res.year = self.convertyear(res.year, res.century_specified) 
+ 
         if ((res.tzoffset == 0 and not res.tzname) or
              (res.tzname == 'Z' or res.tzname == 'z')):
-            res.tzname = "UTC"
-            res.tzoffset = 0
-        elif res.tzoffset != 0 and res.tzname and self.utczone(res.tzname):
-            res.tzoffset = 0
-        return True
-
-
-class _ymd(list):
-    def __init__(self, *args, **kwargs):
-        super(self.__class__, self).__init__(*args, **kwargs)
-        self.century_specified = False
-        self.dstridx = None
-        self.mstridx = None
-        self.ystridx = None
-
-    @property
-    def has_year(self):
-        return self.ystridx is not None
-
-    @property
-    def has_month(self):
-        return self.mstridx is not None
-
-    @property
-    def has_day(self):
-        return self.dstridx is not None
-
-    def could_be_day(self, value):
-        if self.has_day:
-            return False
-        elif not self.has_month:
-            return 1 <= value <= 31
-        elif not self.has_year:
+            res.tzname = "UTC" 
+            res.tzoffset = 0 
+        elif res.tzoffset != 0 and res.tzname and self.utczone(res.tzname): 
+            res.tzoffset = 0 
+        return True 
+ 
+ 
+class _ymd(list): 
+    def __init__(self, *args, **kwargs): 
+        super(self.__class__, self).__init__(*args, **kwargs) 
+        self.century_specified = False 
+        self.dstridx = None 
+        self.mstridx = None 
+        self.ystridx = None 
+ 
+    @property 
+    def has_year(self): 
+        return self.ystridx is not None 
+ 
+    @property 
+    def has_month(self): 
+        return self.mstridx is not None 
+ 
+    @property 
+    def has_day(self): 
+        return self.dstridx is not None 
+ 
+    def could_be_day(self, value): 
+        if self.has_day: 
+            return False 
+        elif not self.has_month: 
+            return 1 <= value <= 31 
+        elif not self.has_year: 
             # Be permissive, assume leap year
-            month = self[self.mstridx]
-            return 1 <= value <= monthrange(2000, month)[1]
-        else:
-            month = self[self.mstridx]
-            year = self[self.ystridx]
-            return 1 <= value <= monthrange(year, month)[1]
-
-    def append(self, val, label=None):
-        if hasattr(val, '__len__'):
-            if val.isdigit() and len(val) > 2:
-                self.century_specified = True
-                if label not in [None, 'Y']:  # pragma: no cover
-                    raise ValueError(label)
-                label = 'Y'
-        elif val > 100:
-            self.century_specified = True
-            if label not in [None, 'Y']:  # pragma: no cover
-                raise ValueError(label)
-            label = 'Y'
-
-        super(self.__class__, self).append(int(val))
-
-        if label == 'M':
-            if self.has_month:
-                raise ValueError('Month is already set')
-            self.mstridx = len(self) - 1
-        elif label == 'D':
-            if self.has_day:
-                raise ValueError('Day is already set')
-            self.dstridx = len(self) - 1
-        elif label == 'Y':
-            if self.has_year:
-                raise ValueError('Year is already set')
-            self.ystridx = len(self) - 1
-
-    def _resolve_from_stridxs(self, strids):
-        """
-        Try to resolve the identities of year/month/day elements using
-        ystridx, mstridx, and dstridx, if enough of these are specified.
-        """
-        if len(self) == 3 and len(strids) == 2:
-            # we can back out the remaining stridx value
-            missing = [x for x in range(3) if x not in strids.values()]
-            key = [x for x in ['y', 'm', 'd'] if x not in strids]
-            assert len(missing) == len(key) == 1
-            key = key[0]
-            val = missing[0]
-            strids[key] = val
-
-        assert len(self) == len(strids)  # otherwise this should not be called
-        out = {key: self[strids[key]] for key in strids}
-        return (out.get('y'), out.get('m'), out.get('d'))
-
-    def resolve_ymd(self, yearfirst, dayfirst):
-        len_ymd = len(self)
-        year, month, day = (None, None, None)
-
-        strids = (('y', self.ystridx),
-                  ('m', self.mstridx),
-                  ('d', self.dstridx))
-
-        strids = {key: val for key, val in strids if val is not None}
-        if (len(self) == len(strids) > 0 or
-                (len(self) == 3 and len(strids) == 2)):
-            return self._resolve_from_stridxs(strids)
-
-        mstridx = self.mstridx
-
-        if len_ymd > 3:
-            raise ValueError("More than three YMD values")
-        elif len_ymd == 1 or (mstridx is not None and len_ymd == 2):
-            # One member, or two members with a month string
-            if mstridx is not None:
-                month = self[mstridx]
-                # since mstridx is 0 or 1, self[mstridx-1] always
-                # looks up the other element
-                other = self[mstridx - 1]
-            else:
-                other = self[0]
-
-            if len_ymd > 1 or mstridx is None:
-                if other > 31:
-                    year = other
-                else:
-                    day = other
-
-        elif len_ymd == 2:
-            # Two members with numbers
-            if self[0] > 31:
-                # 99-01
-                year, month = self
-            elif self[1] > 31:
-                # 01-99
-                month, year = self
-            elif dayfirst and self[1] <= 12:
-                # 13-01
-                day, month = self
-            else:
-                # 01-13
-                month, day = self
-
-        elif len_ymd == 3:
-            # Three members
-            if mstridx == 0:
-                if self[1] > 31:
-                    # Apr-2003-25
-                    month, year, day = self
-                else:
-                    month, day, year = self
-            elif mstridx == 1:
-                if self[0] > 31 or (yearfirst and self[2] <= 31):
-                    # 99-Jan-01
-                    year, month, day = self
-                else:
-                    # 01-Jan-01
+            month = self[self.mstridx] 
+            return 1 <= value <= monthrange(2000, month)[1] 
+        else: 
+            month = self[self.mstridx] 
+            year = self[self.ystridx] 
+            return 1 <= value <= monthrange(year, month)[1] 
+ 
+    def append(self, val, label=None): 
+        if hasattr(val, '__len__'): 
+            if val.isdigit() and len(val) > 2: 
+                self.century_specified = True 
+                if label not in [None, 'Y']:  # pragma: no cover 
+                    raise ValueError(label) 
+                label = 'Y' 
+        elif val > 100: 
+            self.century_specified = True 
+            if label not in [None, 'Y']:  # pragma: no cover 
+                raise ValueError(label) 
+            label = 'Y' 
+ 
+        super(self.__class__, self).append(int(val)) 
+ 
+        if label == 'M': 
+            if self.has_month: 
+                raise ValueError('Month is already set') 
+            self.mstridx = len(self) - 1 
+        elif label == 'D': 
+            if self.has_day: 
+                raise ValueError('Day is already set') 
+            self.dstridx = len(self) - 1 
+        elif label == 'Y': 
+            if self.has_year: 
+                raise ValueError('Year is already set') 
+            self.ystridx = len(self) - 1 
+ 
+    def _resolve_from_stridxs(self, strids): 
+        """ 
+        Try to resolve the identities of year/month/day elements using 
+        ystridx, mstridx, and dstridx, if enough of these are specified. 
+        """ 
+        if len(self) == 3 and len(strids) == 2: 
+            # we can back out the remaining stridx value 
+            missing = [x for x in range(3) if x not in strids.values()] 
+            key = [x for x in ['y', 'm', 'd'] if x not in strids] 
+            assert len(missing) == len(key) == 1 
+            key = key[0] 
+            val = missing[0] 
+            strids[key] = val 
+ 
+        assert len(self) == len(strids)  # otherwise this should not be called 
+        out = {key: self[strids[key]] for key in strids} 
+        return (out.get('y'), out.get('m'), out.get('d')) 
+ 
+    def resolve_ymd(self, yearfirst, dayfirst): 
+        len_ymd = len(self) 
+        year, month, day = (None, None, None) 
+ 
+        strids = (('y', self.ystridx), 
+                  ('m', self.mstridx), 
+                  ('d', self.dstridx)) 
+ 
+        strids = {key: val for key, val in strids if val is not None} 
+        if (len(self) == len(strids) > 0 or 
+                (len(self) == 3 and len(strids) == 2)): 
+            return self._resolve_from_stridxs(strids) 
+ 
+        mstridx = self.mstridx 
+ 
+        if len_ymd > 3: 
+            raise ValueError("More than three YMD values") 
+        elif len_ymd == 1 or (mstridx is not None and len_ymd == 2): 
+            # One member, or two members with a month string 
+            if mstridx is not None: 
+                month = self[mstridx] 
+                # since mstridx is 0 or 1, self[mstridx-1] always 
+                # looks up the other element 
+                other = self[mstridx - 1] 
+            else: 
+                other = self[0] 
+ 
+            if len_ymd > 1 or mstridx is None: 
+                if other > 31: 
+                    year = other 
+                else: 
+                    day = other 
+ 
+        elif len_ymd == 2: 
+            # Two members with numbers 
+            if self[0] > 31: 
+                # 99-01 
+                year, month = self 
+            elif self[1] > 31: 
+                # 01-99 
+                month, year = self 
+            elif dayfirst and self[1] <= 12: 
+                # 13-01 
+                day, month = self 
+            else: 
+                # 01-13 
+                month, day = self 
+ 
+        elif len_ymd == 3: 
+            # Three members 
+            if mstridx == 0: 
+                if self[1] > 31: 
+                    # Apr-2003-25 
+                    month, year, day = self 
+                else: 
+                    month, day, year = self 
+            elif mstridx == 1: 
+                if self[0] > 31 or (yearfirst and self[2] <= 31): 
+                    # 99-Jan-01 
+                    year, month, day = self 
+                else: 
+                    # 01-Jan-01 
                     # Give precedence to day-first, since
-                    # two-digit years is usually hand-written.
-                    day, month, year = self
-
-            elif mstridx == 2:
-                # WTF!?
-                if self[1] > 31:
-                    # 01-99-Jan
-                    day, year, month = self
-                else:
-                    # 99-01-Jan
-                    year, day, month = self
-
-            else:
-                if (self[0] > 31 or
-                    self.ystridx == 0 or
-                        (yearfirst and self[1] <= 12 and self[2] <= 31)):
-                    # 99-01-01
-                    if dayfirst and self[2] <= 12:
-                        year, day, month = self
-                    else:
-                        year, month, day = self
-                elif self[0] > 12 or (dayfirst and self[1] <= 12):
-                    # 13-01-01
-                    day, month, year = self
-                else:
-                    # 01-13-01
-                    month, day, year = self
-
-        return year, month, day
-
-
-class parser(object):
-    def __init__(self, info=None):
-        self.info = info or parserinfo()
-
-    def parse(self, timestr, default=None,
-              ignoretz=False, tzinfos=None, **kwargs):
-        """
-        Parse the date/time string into a :class:`datetime.datetime` object.
-
-        :param timestr:
-            Any date/time string using the supported formats.
-
-        :param default:
-            The default datetime object, if this is a datetime object and not
-            ``None``, elements specified in ``timestr`` replace elements in the
-            default object.
-
-        :param ignoretz:
-            If set ``True``, time zones in parsed strings are ignored and a
-            naive :class:`datetime.datetime` object is returned.
-
-        :param tzinfos:
-            Additional time zone names / aliases which may be present in the
-            string. This argument maps time zone names (and optionally offsets
-            from those time zones) to time zones. This parameter can be a
-            dictionary with timezone aliases mapping time zone names to time
-            zones or a function taking two parameters (``tzname`` and
-            ``tzoffset``) and returning a time zone.
-
-            The timezones to which the names are mapped can be an integer
-            offset from UTC in seconds or a :class:`tzinfo` object.
-
-            .. doctest::
-               :options: +NORMALIZE_WHITESPACE
-
-                >>> from dateutil.parser import parse
-                >>> from dateutil.tz import gettz
-                >>> tzinfos = {"BRST": -7200, "CST": gettz("America/Chicago")}
-                >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos)
-                datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -7200))
-                >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos)
-                datetime.datetime(2012, 1, 19, 17, 21,
-                                  tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago'))
-
-            This parameter is ignored if ``ignoretz`` is set.
-
-        :param \\*\\*kwargs:
-            Keyword arguments as passed to ``_parse()``.
-
-        :return:
-            Returns a :class:`datetime.datetime` object or, if the
-            ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the
-            first element being a :class:`datetime.datetime` object, the second
-            a tuple containing the fuzzy tokens.
-
+                    # two-digit years is usually hand-written. 
+                    day, month, year = self 
+ 
+            elif mstridx == 2: 
+                # WTF!? 
+                if self[1] > 31: 
+                    # 01-99-Jan 
+                    day, year, month = self 
+                else: 
+                    # 99-01-Jan 
+                    year, day, month = self 
+ 
+            else: 
+                if (self[0] > 31 or 
+                    self.ystridx == 0 or 
+                        (yearfirst and self[1] <= 12 and self[2] <= 31)): 
+                    # 99-01-01 
+                    if dayfirst and self[2] <= 12: 
+                        year, day, month = self 
+                    else: 
+                        year, month, day = self 
+                elif self[0] > 12 or (dayfirst and self[1] <= 12): 
+                    # 13-01-01 
+                    day, month, year = self 
+                else: 
+                    # 01-13-01 
+                    month, day, year = self 
+ 
+        return year, month, day 
+ 
+ 
+class parser(object): 
+    def __init__(self, info=None): 
+        self.info = info or parserinfo() 
+ 
+    def parse(self, timestr, default=None, 
+              ignoretz=False, tzinfos=None, **kwargs): 
+        """ 
+        Parse the date/time string into a :class:`datetime.datetime` object. 
+ 
+        :param timestr: 
+            Any date/time string using the supported formats. 
+ 
+        :param default: 
+            The default datetime object, if this is a datetime object and not 
+            ``None``, elements specified in ``timestr`` replace elements in the 
+            default object. 
+ 
+        :param ignoretz: 
+            If set ``True``, time zones in parsed strings are ignored and a 
+            naive :class:`datetime.datetime` object is returned. 
+ 
+        :param tzinfos: 
+            Additional time zone names / aliases which may be present in the 
+            string. This argument maps time zone names (and optionally offsets 
+            from those time zones) to time zones. This parameter can be a 
+            dictionary with timezone aliases mapping time zone names to time 
+            zones or a function taking two parameters (``tzname`` and 
+            ``tzoffset``) and returning a time zone. 
+ 
+            The timezones to which the names are mapped can be an integer 
+            offset from UTC in seconds or a :class:`tzinfo` object. 
+ 
+            .. doctest:: 
+               :options: +NORMALIZE_WHITESPACE 
+ 
+                >>> from dateutil.parser import parse 
+                >>> from dateutil.tz import gettz 
+                >>> tzinfos = {"BRST": -7200, "CST": gettz("America/Chicago")} 
+                >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos) 
+                datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -7200)) 
+                >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos) 
+                datetime.datetime(2012, 1, 19, 17, 21, 
+                                  tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago')) 
+ 
+            This parameter is ignored if ``ignoretz`` is set. 
+ 
+        :param \\*\\*kwargs: 
+            Keyword arguments as passed to ``_parse()``. 
+ 
+        :return: 
+            Returns a :class:`datetime.datetime` object or, if the 
+            ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the 
+            first element being a :class:`datetime.datetime` object, the second 
+            a tuple containing the fuzzy tokens. 
+ 
         :raises ParserError:
-            Raised for invalid or unknown string format, if the provided
-            :class:`tzinfo` is not in a valid format, or if an invalid date
-            would be created.
-
-        :raises TypeError:
-            Raised for non-string or character stream input.
-
-        :raises OverflowError:
-            Raised if the parsed date exceeds the largest valid C integer on
-            your system.
-        """
-
-        if default is None:
-            default = datetime.datetime.now().replace(hour=0, minute=0,
-                                                      second=0, microsecond=0)
-
-        res, skipped_tokens = self._parse(timestr, **kwargs)
-
-        if res is None:
+            Raised for invalid or unknown string format, if the provided 
+            :class:`tzinfo` is not in a valid format, or if an invalid date 
+            would be created. 
+ 
+        :raises TypeError: 
+            Raised for non-string or character stream input. 
+ 
+        :raises OverflowError: 
+            Raised if the parsed date exceeds the largest valid C integer on 
+            your system. 
+        """ 
+ 
+        if default is None: 
+            default = datetime.datetime.now().replace(hour=0, minute=0, 
+                                                      second=0, microsecond=0) 
+ 
+        res, skipped_tokens = self._parse(timestr, **kwargs) 
+ 
+        if res is None: 
             raise ParserError("Unknown string format: %s", timestr)
-
-        if len(res) == 0:
+ 
+        if len(res) == 0: 
             raise ParserError("String does not contain a date: %s", timestr)
-
+ 
         try:
             ret = self._build_naive(res, default)
         except ValueError as e:
             six.raise_from(ParserError(str(e) + ": %s", timestr), e)
-
-        if not ignoretz:
-            ret = self._build_tzaware(ret, res, tzinfos)
-
-        if kwargs.get('fuzzy_with_tokens', False):
-            return ret, skipped_tokens
-        else:
-            return ret
-
-    class _result(_resultbase):
-        __slots__ = ["year", "month", "day", "weekday",
-                     "hour", "minute", "second", "microsecond",
-                     "tzname", "tzoffset", "ampm","any_unused_tokens"]
-
-    def _parse(self, timestr, dayfirst=None, yearfirst=None, fuzzy=False,
-               fuzzy_with_tokens=False):
-        """
-        Private method which performs the heavy lifting of parsing, called from
-        ``parse()``, which passes on its ``kwargs`` to this function.
-
-        :param timestr:
-            The string to parse.
-
-        :param dayfirst:
-            Whether to interpret the first value in an ambiguous 3-integer date
-            (e.g. 01/05/09) as the day (``True``) or month (``False``). If
-            ``yearfirst`` is set to ``True``, this distinguishes between YDM
-            and YMD. If set to ``None``, this value is retrieved from the
-            current :class:`parserinfo` object (which itself defaults to
-            ``False``).
-
-        :param yearfirst:
-            Whether to interpret the first value in an ambiguous 3-integer date
-            (e.g. 01/05/09) as the year. If ``True``, the first number is taken
-            to be the year, otherwise the last number is taken to be the year.
-            If this is set to ``None``, the value is retrieved from the current
-            :class:`parserinfo` object (which itself defaults to ``False``).
-
-        :param fuzzy:
-            Whether to allow fuzzy parsing, allowing for string like "Today is
-            January 1, 2047 at 8:21:00AM".
-
-        :param fuzzy_with_tokens:
-            If ``True``, ``fuzzy`` is automatically set to True, and the parser
-            will return a tuple where the first element is the parsed
-            :class:`datetime.datetime` datetimestamp and the second element is
-            a tuple containing the portions of the string which were ignored:
-
-            .. doctest::
-
-                >>> from dateutil.parser import parse
-                >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True)
-                (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))
-
-        """
-        if fuzzy_with_tokens:
-            fuzzy = True
-
-        info = self.info
-
-        if dayfirst is None:
-            dayfirst = info.dayfirst
-
-        if yearfirst is None:
-            yearfirst = info.yearfirst
-
-        res = self._result()
-        l = _timelex.split(timestr)         # Splits the timestr into tokens
-
-        skipped_idxs = []
-
-        # year/month/day list
-        ymd = _ymd()
-
-        len_l = len(l)
-        i = 0
-        try:
-            while i < len_l:
-
-                # Check if it's a number
-                value_repr = l[i]
-                try:
-                    value = float(value_repr)
-                except ValueError:
-                    value = None
-
-                if value is not None:
-                    # Numeric token
-                    i = self._parse_numeric_token(l, i, info, ymd, res, fuzzy)
-
-                # Check weekday
-                elif info.weekday(l[i]) is not None:
-                    value = info.weekday(l[i])
-                    res.weekday = value
-
-                # Check month name
-                elif info.month(l[i]) is not None:
-                    value = info.month(l[i])
-                    ymd.append(value, 'M')
-
-                    if i + 1 < len_l:
-                        if l[i + 1] in ('-', '/'):
-                            # Jan-01[-99]
-                            sep = l[i + 1]
-                            ymd.append(l[i + 2])
-
-                            if i + 3 < len_l and l[i + 3] == sep:
-                                # Jan-01-99
-                                ymd.append(l[i + 4])
-                                i += 2
-
-                            i += 2
-
-                        elif (i + 4 < len_l and l[i + 1] == l[i + 3] == ' ' and
-                              info.pertain(l[i + 2])):
-                            # Jan of 01
-                            # In this case, 01 is clearly year
-                            if l[i + 4].isdigit():
-                                # Convert it here to become unambiguous
-                                value = int(l[i + 4])
-                                year = str(info.convertyear(value))
-                                ymd.append(year, 'Y')
-                            else:
-                                # Wrong guess
-                                pass
-                                # TODO: not hit in tests
-                            i += 4
-
-                # Check am/pm
-                elif info.ampm(l[i]) is not None:
-                    value = info.ampm(l[i])
-                    val_is_ampm = self._ampm_valid(res.hour, res.ampm, fuzzy)
-
-                    if val_is_ampm:
-                        res.hour = self._adjust_ampm(res.hour, value)
-                        res.ampm = value
-
-                    elif fuzzy:
-                        skipped_idxs.append(i)
-
-                # Check for a timezone name
-                elif self._could_be_tzname(res.hour, res.tzname, res.tzoffset, l[i]):
-                    res.tzname = l[i]
-                    res.tzoffset = info.tzoffset(res.tzname)
-
-                    # Check for something like GMT+3, or BRST+3. Notice
-                    # that it doesn't mean "I am 3 hours after GMT", but
-                    # "my time +3 is GMT". If found, we reverse the
-                    # logic so that timezone parsing code will get it
-                    # right.
-                    if i + 1 < len_l and l[i + 1] in ('+', '-'):
-                        l[i + 1] = ('+', '-')[l[i + 1] == '+']
-                        res.tzoffset = None
-                        if info.utczone(res.tzname):
-                            # With something like GMT+3, the timezone
-                            # is *not* GMT.
-                            res.tzname = None
-
-                # Check for a numbered timezone
-                elif res.hour is not None and l[i] in ('+', '-'):
-                    signal = (-1, 1)[l[i] == '+']
-                    len_li = len(l[i + 1])
-
-                    # TODO: check that l[i + 1] is integer?
-                    if len_li == 4:
-                        # -0300
-                        hour_offset = int(l[i + 1][:2])
-                        min_offset = int(l[i + 1][2:])
-                    elif i + 2 < len_l and l[i + 2] == ':':
-                        # -03:00
-                        hour_offset = int(l[i + 1])
-                        min_offset = int(l[i + 3])  # TODO: Check that l[i+3] is minute-like?
-                        i += 2
-                    elif len_li <= 2:
-                        # -[0]3
-                        hour_offset = int(l[i + 1][:2])
-                        min_offset = 0
-                    else:
-                        raise ValueError(timestr)
-
-                    res.tzoffset = signal * (hour_offset * 3600 + min_offset * 60)
-
-                    # Look for a timezone name between parenthesis
-                    if (i + 5 < len_l and
-                            info.jump(l[i + 2]) and l[i + 3] == '(' and
-                            l[i + 5] == ')' and
-                            3 <= len(l[i + 4]) and
-                            self._could_be_tzname(res.hour, res.tzname,
-                                                  None, l[i + 4])):
-                        # -0300 (BRST)
-                        res.tzname = l[i + 4]
-                        i += 4
-
-                    i += 1
-
-                # Check jumps
-                elif not (info.jump(l[i]) or fuzzy):
-                    raise ValueError(timestr)
-
-                else:
-                    skipped_idxs.append(i)
-                i += 1
-
-            # Process year/month/day
-            year, month, day = ymd.resolve_ymd(yearfirst, dayfirst)
-
-            res.century_specified = ymd.century_specified
-            res.year = year
-            res.month = month
-            res.day = day
-
-        except (IndexError, ValueError):
-            return None, None
-
-        if not info.validate(res):
-            return None, None
-
-        if fuzzy_with_tokens:
-            skipped_tokens = self._recombine_skipped(l, skipped_idxs)
-            return res, tuple(skipped_tokens)
-        else:
-            return res, None
-
-    def _parse_numeric_token(self, tokens, idx, info, ymd, res, fuzzy):
-        # Token is a number
-        value_repr = tokens[idx]
-        try:
-            value = self._to_decimal(value_repr)
-        except Exception as e:
-            six.raise_from(ValueError('Unknown numeric token'), e)
-
-        len_li = len(value_repr)
-
-        len_l = len(tokens)
-
-        if (len(ymd) == 3 and len_li in (2, 4) and
-            res.hour is None and
-            (idx + 1 >= len_l or
-             (tokens[idx + 1] != ':' and
-              info.hms(tokens[idx + 1]) is None))):
-            # 19990101T23[59]
-            s = tokens[idx]
-            res.hour = int(s[:2])
-
-            if len_li == 4:
-                res.minute = int(s[2:])
-
-        elif len_li == 6 or (len_li > 6 and tokens[idx].find('.') == 6):
-            # YYMMDD or HHMMSS[.ss]
-            s = tokens[idx]
-
-            if not ymd and '.' not in tokens[idx]:
-                ymd.append(s[:2])
-                ymd.append(s[2:4])
-                ymd.append(s[4:])
-            else:
-                # 19990101T235959[.59]
-
-                # TODO: Check if res attributes already set.
-                res.hour = int(s[:2])
-                res.minute = int(s[2:4])
-                res.second, res.microsecond = self._parsems(s[4:])
-
-        elif len_li in (8, 12, 14):
-            # YYYYMMDD
-            s = tokens[idx]
-            ymd.append(s[:4], 'Y')
-            ymd.append(s[4:6])
-            ymd.append(s[6:8])
-
-            if len_li > 8:
-                res.hour = int(s[8:10])
-                res.minute = int(s[10:12])
-
-                if len_li > 12:
-                    res.second = int(s[12:])
-
-        elif self._find_hms_idx(idx, tokens, info, allow_jump=True) is not None:
-            # HH[ ]h or MM[ ]m or SS[.ss][ ]s
-            hms_idx = self._find_hms_idx(idx, tokens, info, allow_jump=True)
-            (idx, hms) = self._parse_hms(idx, tokens, info, hms_idx)
-            if hms is not None:
-                # TODO: checking that hour/minute/second are not
-                # already set?
-                self._assign_hms(res, value_repr, hms)
-
-        elif idx + 2 < len_l and tokens[idx + 1] == ':':
-            # HH:MM[:SS[.ss]]
-            res.hour = int(value)
-            value = self._to_decimal(tokens[idx + 2])  # TODO: try/except for this?
-            (res.minute, res.second) = self._parse_min_sec(value)
-
-            if idx + 4 < len_l and tokens[idx + 3] == ':':
-                res.second, res.microsecond = self._parsems(tokens[idx + 4])
-
-                idx += 2
-
-            idx += 2
-
-        elif idx + 1 < len_l and tokens[idx + 1] in ('-', '/', '.'):
-            sep = tokens[idx + 1]
-            ymd.append(value_repr)
-
-            if idx + 2 < len_l and not info.jump(tokens[idx + 2]):
-                if tokens[idx + 2].isdigit():
-                    # 01-01[-01]
-                    ymd.append(tokens[idx + 2])
-                else:
-                    # 01-Jan[-01]
-                    value = info.month(tokens[idx + 2])
-
-                    if value is not None:
-                        ymd.append(value, 'M')
-                    else:
-                        raise ValueError()
-
-                if idx + 3 < len_l and tokens[idx + 3] == sep:
-                    # We have three members
-                    value = info.month(tokens[idx + 4])
-
-                    if value is not None:
-                        ymd.append(value, 'M')
-                    else:
-                        ymd.append(tokens[idx + 4])
-                    idx += 2
-
-                idx += 1
-            idx += 1
-
-        elif idx + 1 >= len_l or info.jump(tokens[idx + 1]):
-            if idx + 2 < len_l and info.ampm(tokens[idx + 2]) is not None:
-                # 12 am
-                hour = int(value)
-                res.hour = self._adjust_ampm(hour, info.ampm(tokens[idx + 2]))
-                idx += 1
-            else:
-                # Year, month or day
-                ymd.append(value)
-            idx += 1
-
-        elif info.ampm(tokens[idx + 1]) is not None and (0 <= value < 24):
-            # 12am
-            hour = int(value)
-            res.hour = self._adjust_ampm(hour, info.ampm(tokens[idx + 1]))
-            idx += 1
-
-        elif ymd.could_be_day(value):
-            ymd.append(value)
-
-        elif not fuzzy:
-            raise ValueError()
-
-        return idx
-
-    def _find_hms_idx(self, idx, tokens, info, allow_jump):
-        len_l = len(tokens)
-
-        if idx+1 < len_l and info.hms(tokens[idx+1]) is not None:
-            # There is an "h", "m", or "s" label following this token.  We take
-            # assign the upcoming label to the current token.
-            # e.g. the "12" in 12h"
-            hms_idx = idx + 1
-
-        elif (allow_jump and idx+2 < len_l and tokens[idx+1] == ' ' and
-              info.hms(tokens[idx+2]) is not None):
-            # There is a space and then an "h", "m", or "s" label.
-            # e.g. the "12" in "12 h"
-            hms_idx = idx + 2
-
-        elif idx > 0 and info.hms(tokens[idx-1]) is not None:
+ 
+        if not ignoretz: 
+            ret = self._build_tzaware(ret, res, tzinfos) 
+ 
+        if kwargs.get('fuzzy_with_tokens', False): 
+            return ret, skipped_tokens 
+        else: 
+            return ret 
+ 
+    class _result(_resultbase): 
+        __slots__ = ["year", "month", "day", "weekday", 
+                     "hour", "minute", "second", "microsecond", 
+                     "tzname", "tzoffset", "ampm","any_unused_tokens"] 
+ 
+    def _parse(self, timestr, dayfirst=None, yearfirst=None, fuzzy=False, 
+               fuzzy_with_tokens=False): 
+        """ 
+        Private method which performs the heavy lifting of parsing, called from 
+        ``parse()``, which passes on its ``kwargs`` to this function. 
+ 
+        :param timestr: 
+            The string to parse. 
+ 
+        :param dayfirst: 
+            Whether to interpret the first value in an ambiguous 3-integer date 
+            (e.g. 01/05/09) as the day (``True``) or month (``False``). If 
+            ``yearfirst`` is set to ``True``, this distinguishes between YDM 
+            and YMD. If set to ``None``, this value is retrieved from the 
+            current :class:`parserinfo` object (which itself defaults to 
+            ``False``). 
+ 
+        :param yearfirst: 
+            Whether to interpret the first value in an ambiguous 3-integer date 
+            (e.g. 01/05/09) as the year. If ``True``, the first number is taken 
+            to be the year, otherwise the last number is taken to be the year. 
+            If this is set to ``None``, the value is retrieved from the current 
+            :class:`parserinfo` object (which itself defaults to ``False``). 
+ 
+        :param fuzzy: 
+            Whether to allow fuzzy parsing, allowing for string like "Today is 
+            January 1, 2047 at 8:21:00AM". 
+ 
+        :param fuzzy_with_tokens: 
+            If ``True``, ``fuzzy`` is automatically set to True, and the parser 
+            will return a tuple where the first element is the parsed 
+            :class:`datetime.datetime` datetimestamp and the second element is 
+            a tuple containing the portions of the string which were ignored: 
+ 
+            .. doctest:: 
+ 
+                >>> from dateutil.parser import parse 
+                >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True) 
+                (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at ')) 
+ 
+        """ 
+        if fuzzy_with_tokens: 
+            fuzzy = True 
+ 
+        info = self.info 
+ 
+        if dayfirst is None: 
+            dayfirst = info.dayfirst 
+ 
+        if yearfirst is None: 
+            yearfirst = info.yearfirst 
+ 
+        res = self._result() 
+        l = _timelex.split(timestr)         # Splits the timestr into tokens 
+ 
+        skipped_idxs = [] 
+ 
+        # year/month/day list 
+        ymd = _ymd() 
+ 
+        len_l = len(l) 
+        i = 0 
+        try: 
+            while i < len_l: 
+ 
+                # Check if it's a number 
+                value_repr = l[i] 
+                try: 
+                    value = float(value_repr) 
+                except ValueError: 
+                    value = None 
+ 
+                if value is not None: 
+                    # Numeric token 
+                    i = self._parse_numeric_token(l, i, info, ymd, res, fuzzy) 
+ 
+                # Check weekday 
+                elif info.weekday(l[i]) is not None: 
+                    value = info.weekday(l[i]) 
+                    res.weekday = value 
+ 
+                # Check month name 
+                elif info.month(l[i]) is not None: 
+                    value = info.month(l[i]) 
+                    ymd.append(value, 'M') 
+ 
+                    if i + 1 < len_l: 
+                        if l[i + 1] in ('-', '/'): 
+                            # Jan-01[-99] 
+                            sep = l[i + 1] 
+                            ymd.append(l[i + 2]) 
+ 
+                            if i + 3 < len_l and l[i + 3] == sep: 
+                                # Jan-01-99 
+                                ymd.append(l[i + 4]) 
+                                i += 2 
+ 
+                            i += 2 
+ 
+                        elif (i + 4 < len_l and l[i + 1] == l[i + 3] == ' ' and 
+                              info.pertain(l[i + 2])): 
+                            # Jan of 01 
+                            # In this case, 01 is clearly year 
+                            if l[i + 4].isdigit(): 
+                                # Convert it here to become unambiguous 
+                                value = int(l[i + 4]) 
+                                year = str(info.convertyear(value)) 
+                                ymd.append(year, 'Y') 
+                            else: 
+                                # Wrong guess 
+                                pass 
+                                # TODO: not hit in tests 
+                            i += 4 
+ 
+                # Check am/pm 
+                elif info.ampm(l[i]) is not None: 
+                    value = info.ampm(l[i]) 
+                    val_is_ampm = self._ampm_valid(res.hour, res.ampm, fuzzy) 
+ 
+                    if val_is_ampm: 
+                        res.hour = self._adjust_ampm(res.hour, value) 
+                        res.ampm = value 
+ 
+                    elif fuzzy: 
+                        skipped_idxs.append(i) 
+ 
+                # Check for a timezone name 
+                elif self._could_be_tzname(res.hour, res.tzname, res.tzoffset, l[i]): 
+                    res.tzname = l[i] 
+                    res.tzoffset = info.tzoffset(res.tzname) 
+ 
+                    # Check for something like GMT+3, or BRST+3. Notice 
+                    # that it doesn't mean "I am 3 hours after GMT", but 
+                    # "my time +3 is GMT". If found, we reverse the 
+                    # logic so that timezone parsing code will get it 
+                    # right. 
+                    if i + 1 < len_l and l[i + 1] in ('+', '-'): 
+                        l[i + 1] = ('+', '-')[l[i + 1] == '+'] 
+                        res.tzoffset = None 
+                        if info.utczone(res.tzname): 
+                            # With something like GMT+3, the timezone 
+                            # is *not* GMT. 
+                            res.tzname = None 
+ 
+                # Check for a numbered timezone 
+                elif res.hour is not None and l[i] in ('+', '-'): 
+                    signal = (-1, 1)[l[i] == '+'] 
+                    len_li = len(l[i + 1]) 
+ 
+                    # TODO: check that l[i + 1] is integer? 
+                    if len_li == 4: 
+                        # -0300 
+                        hour_offset = int(l[i + 1][:2]) 
+                        min_offset = int(l[i + 1][2:]) 
+                    elif i + 2 < len_l and l[i + 2] == ':': 
+                        # -03:00 
+                        hour_offset = int(l[i + 1]) 
+                        min_offset = int(l[i + 3])  # TODO: Check that l[i+3] is minute-like? 
+                        i += 2 
+                    elif len_li <= 2: 
+                        # -[0]3 
+                        hour_offset = int(l[i + 1][:2]) 
+                        min_offset = 0 
+                    else: 
+                        raise ValueError(timestr) 
+ 
+                    res.tzoffset = signal * (hour_offset * 3600 + min_offset * 60) 
+ 
+                    # Look for a timezone name between parenthesis 
+                    if (i + 5 < len_l and 
+                            info.jump(l[i + 2]) and l[i + 3] == '(' and 
+                            l[i + 5] == ')' and 
+                            3 <= len(l[i + 4]) and 
+                            self._could_be_tzname(res.hour, res.tzname, 
+                                                  None, l[i + 4])): 
+                        # -0300 (BRST) 
+                        res.tzname = l[i + 4] 
+                        i += 4 
+ 
+                    i += 1 
+ 
+                # Check jumps 
+                elif not (info.jump(l[i]) or fuzzy): 
+                    raise ValueError(timestr) 
+ 
+                else: 
+                    skipped_idxs.append(i) 
+                i += 1 
+ 
+            # Process year/month/day 
+            year, month, day = ymd.resolve_ymd(yearfirst, dayfirst) 
+ 
+            res.century_specified = ymd.century_specified 
+            res.year = year 
+            res.month = month 
+            res.day = day 
+ 
+        except (IndexError, ValueError): 
+            return None, None 
+ 
+        if not info.validate(res): 
+            return None, None 
+ 
+        if fuzzy_with_tokens: 
+            skipped_tokens = self._recombine_skipped(l, skipped_idxs) 
+            return res, tuple(skipped_tokens) 
+        else: 
+            return res, None 
+ 
+    def _parse_numeric_token(self, tokens, idx, info, ymd, res, fuzzy): 
+        # Token is a number 
+        value_repr = tokens[idx] 
+        try: 
+            value = self._to_decimal(value_repr) 
+        except Exception as e: 
+            six.raise_from(ValueError('Unknown numeric token'), e) 
+ 
+        len_li = len(value_repr) 
+ 
+        len_l = len(tokens) 
+ 
+        if (len(ymd) == 3 and len_li in (2, 4) and 
+            res.hour is None and 
+            (idx + 1 >= len_l or 
+             (tokens[idx + 1] != ':' and 
+              info.hms(tokens[idx + 1]) is None))): 
+            # 19990101T23[59] 
+            s = tokens[idx] 
+            res.hour = int(s[:2]) 
+ 
+            if len_li == 4: 
+                res.minute = int(s[2:]) 
+ 
+        elif len_li == 6 or (len_li > 6 and tokens[idx].find('.') == 6): 
+            # YYMMDD or HHMMSS[.ss] 
+            s = tokens[idx] 
+ 
+            if not ymd and '.' not in tokens[idx]: 
+                ymd.append(s[:2]) 
+                ymd.append(s[2:4]) 
+                ymd.append(s[4:]) 
+            else: 
+                # 19990101T235959[.59] 
+ 
+                # TODO: Check if res attributes already set. 
+                res.hour = int(s[:2]) 
+                res.minute = int(s[2:4]) 
+                res.second, res.microsecond = self._parsems(s[4:]) 
+ 
+        elif len_li in (8, 12, 14): 
+            # YYYYMMDD 
+            s = tokens[idx] 
+            ymd.append(s[:4], 'Y') 
+            ymd.append(s[4:6]) 
+            ymd.append(s[6:8]) 
+ 
+            if len_li > 8: 
+                res.hour = int(s[8:10]) 
+                res.minute = int(s[10:12]) 
+ 
+                if len_li > 12: 
+                    res.second = int(s[12:]) 
+ 
+        elif self._find_hms_idx(idx, tokens, info, allow_jump=True) is not None: 
+            # HH[ ]h or MM[ ]m or SS[.ss][ ]s 
+            hms_idx = self._find_hms_idx(idx, tokens, info, allow_jump=True) 
+            (idx, hms) = self._parse_hms(idx, tokens, info, hms_idx) 
+            if hms is not None: 
+                # TODO: checking that hour/minute/second are not 
+                # already set? 
+                self._assign_hms(res, value_repr, hms) 
+ 
+        elif idx + 2 < len_l and tokens[idx + 1] == ':': 
+            # HH:MM[:SS[.ss]] 
+            res.hour = int(value) 
+            value = self._to_decimal(tokens[idx + 2])  # TODO: try/except for this? 
+            (res.minute, res.second) = self._parse_min_sec(value) 
+ 
+            if idx + 4 < len_l and tokens[idx + 3] == ':': 
+                res.second, res.microsecond = self._parsems(tokens[idx + 4]) 
+ 
+                idx += 2 
+ 
+            idx += 2 
+ 
+        elif idx + 1 < len_l and tokens[idx + 1] in ('-', '/', '.'): 
+            sep = tokens[idx + 1] 
+            ymd.append(value_repr) 
+ 
+            if idx + 2 < len_l and not info.jump(tokens[idx + 2]): 
+                if tokens[idx + 2].isdigit(): 
+                    # 01-01[-01] 
+                    ymd.append(tokens[idx + 2]) 
+                else: 
+                    # 01-Jan[-01] 
+                    value = info.month(tokens[idx + 2]) 
+ 
+                    if value is not None: 
+                        ymd.append(value, 'M') 
+                    else: 
+                        raise ValueError() 
+ 
+                if idx + 3 < len_l and tokens[idx + 3] == sep: 
+                    # We have three members 
+                    value = info.month(tokens[idx + 4]) 
+ 
+                    if value is not None: 
+                        ymd.append(value, 'M') 
+                    else: 
+                        ymd.append(tokens[idx + 4]) 
+                    idx += 2 
+ 
+                idx += 1 
+            idx += 1 
+ 
+        elif idx + 1 >= len_l or info.jump(tokens[idx + 1]): 
+            if idx + 2 < len_l and info.ampm(tokens[idx + 2]) is not None: 
+                # 12 am 
+                hour = int(value) 
+                res.hour = self._adjust_ampm(hour, info.ampm(tokens[idx + 2])) 
+                idx += 1 
+            else: 
+                # Year, month or day 
+                ymd.append(value) 
+            idx += 1 
+ 
+        elif info.ampm(tokens[idx + 1]) is not None and (0 <= value < 24): 
+            # 12am 
+            hour = int(value) 
+            res.hour = self._adjust_ampm(hour, info.ampm(tokens[idx + 1])) 
+            idx += 1 
+ 
+        elif ymd.could_be_day(value): 
+            ymd.append(value) 
+ 
+        elif not fuzzy: 
+            raise ValueError() 
+ 
+        return idx 
+ 
+    def _find_hms_idx(self, idx, tokens, info, allow_jump): 
+        len_l = len(tokens) 
+ 
+        if idx+1 < len_l and info.hms(tokens[idx+1]) is not None: 
+            # There is an "h", "m", or "s" label following this token.  We take 
+            # assign the upcoming label to the current token. 
+            # e.g. the "12" in 12h" 
+            hms_idx = idx + 1 
+ 
+        elif (allow_jump and idx+2 < len_l and tokens[idx+1] == ' ' and 
+              info.hms(tokens[idx+2]) is not None): 
+            # There is a space and then an "h", "m", or "s" label. 
+            # e.g. the "12" in "12 h" 
+            hms_idx = idx + 2 
+ 
+        elif idx > 0 and info.hms(tokens[idx-1]) is not None: 
             # There is a "h", "m", or "s" preceding this token.  Since neither
-            # of the previous cases was hit, there is no label following this
-            # token, so we use the previous label.
-            # e.g. the "04" in "12h04"
-            hms_idx = idx-1
-
-        elif (1 < idx == len_l-1 and tokens[idx-1] == ' ' and
-              info.hms(tokens[idx-2]) is not None):
-            # If we are looking at the final token, we allow for a
-            # backward-looking check to skip over a space.
-            # TODO: Are we sure this is the right condition here?
-            hms_idx = idx - 2
-
-        else:
-            hms_idx = None
-
-        return hms_idx
-
-    def _assign_hms(self, res, value_repr, hms):
-        # See GH issue #427, fixing float rounding
-        value = self._to_decimal(value_repr)
-
-        if hms == 0:
-            # Hour
-            res.hour = int(value)
-            if value % 1:
-                res.minute = int(60*(value % 1))
-
-        elif hms == 1:
-            (res.minute, res.second) = self._parse_min_sec(value)
-
-        elif hms == 2:
-            (res.second, res.microsecond) = self._parsems(value_repr)
-
-    def _could_be_tzname(self, hour, tzname, tzoffset, token):
-        return (hour is not None and
-                tzname is None and
-                tzoffset is None and
-                len(token) <= 5 and
+            # of the previous cases was hit, there is no label following this 
+            # token, so we use the previous label. 
+            # e.g. the "04" in "12h04" 
+            hms_idx = idx-1 
+ 
+        elif (1 < idx == len_l-1 and tokens[idx-1] == ' ' and 
+              info.hms(tokens[idx-2]) is not None): 
+            # If we are looking at the final token, we allow for a 
+            # backward-looking check to skip over a space. 
+            # TODO: Are we sure this is the right condition here? 
+            hms_idx = idx - 2 
+ 
+        else: 
+            hms_idx = None 
+ 
+        return hms_idx 
+ 
+    def _assign_hms(self, res, value_repr, hms): 
+        # See GH issue #427, fixing float rounding 
+        value = self._to_decimal(value_repr) 
+ 
+        if hms == 0: 
+            # Hour 
+            res.hour = int(value) 
+            if value % 1: 
+                res.minute = int(60*(value % 1)) 
+ 
+        elif hms == 1: 
+            (res.minute, res.second) = self._parse_min_sec(value) 
+ 
+        elif hms == 2: 
+            (res.second, res.microsecond) = self._parsems(value_repr) 
+ 
+    def _could_be_tzname(self, hour, tzname, tzoffset, token): 
+        return (hour is not None and 
+                tzname is None and 
+                tzoffset is None and 
+                len(token) <= 5 and 
                 (all(x in string.ascii_uppercase for x in token)
                  or token in self.info.UTCZONE))
-
-    def _ampm_valid(self, hour, ampm, fuzzy):
-        """
-        For fuzzy parsing, 'a' or 'am' (both valid English words)
-        may erroneously trigger the AM/PM flag. Deal with that
-        here.
-        """
-        val_is_ampm = True
-
-        # If there's already an AM/PM flag, this one isn't one.
-        if fuzzy and ampm is not None:
-            val_is_ampm = False
-
-        # If AM/PM is found and hour is not, raise a ValueError
-        if hour is None:
-            if fuzzy:
-                val_is_ampm = False
-            else:
-                raise ValueError('No hour specified with AM or PM flag.')
-        elif not 0 <= hour <= 12:
-            # If AM/PM is found, it's a 12 hour clock, so raise
-            # an error for invalid range
-            if fuzzy:
-                val_is_ampm = False
-            else:
-                raise ValueError('Invalid hour specified for 12-hour clock.')
-
-        return val_is_ampm
-
-    def _adjust_ampm(self, hour, ampm):
-        if hour < 12 and ampm == 1:
-            hour += 12
-        elif hour == 12 and ampm == 0:
-            hour = 0
-        return hour
-
-    def _parse_min_sec(self, value):
-        # TODO: Every usage of this function sets res.second to the return
-        # value. Are there any cases where second will be returned as None and
+ 
+    def _ampm_valid(self, hour, ampm, fuzzy): 
+        """ 
+        For fuzzy parsing, 'a' or 'am' (both valid English words) 
+        may erroneously trigger the AM/PM flag. Deal with that 
+        here. 
+        """ 
+        val_is_ampm = True 
+ 
+        # If there's already an AM/PM flag, this one isn't one. 
+        if fuzzy and ampm is not None: 
+            val_is_ampm = False 
+ 
+        # If AM/PM is found and hour is not, raise a ValueError 
+        if hour is None: 
+            if fuzzy: 
+                val_is_ampm = False 
+            else: 
+                raise ValueError('No hour specified with AM or PM flag.') 
+        elif not 0 <= hour <= 12: 
+            # If AM/PM is found, it's a 12 hour clock, so raise 
+            # an error for invalid range 
+            if fuzzy: 
+                val_is_ampm = False 
+            else: 
+                raise ValueError('Invalid hour specified for 12-hour clock.') 
+ 
+        return val_is_ampm 
+ 
+    def _adjust_ampm(self, hour, ampm): 
+        if hour < 12 and ampm == 1: 
+            hour += 12 
+        elif hour == 12 and ampm == 0: 
+            hour = 0 
+        return hour 
+ 
+    def _parse_min_sec(self, value): 
+        # TODO: Every usage of this function sets res.second to the return 
+        # value. Are there any cases where second will be returned as None and 
         # we *don't* want to set res.second = None?
-        minute = int(value)
-        second = None
-
-        sec_remainder = value % 1
-        if sec_remainder:
-            second = int(60 * sec_remainder)
-        return (minute, second)
-
-    def _parse_hms(self, idx, tokens, info, hms_idx):
-        # TODO: Is this going to admit a lot of false-positives for when we
-        # just happen to have digits and "h", "m" or "s" characters in non-date
-        # text?  I guess hex hashes won't have that problem, but there's plenty
-        # of random junk out there.
-        if hms_idx is None:
-            hms = None
-            new_idx = idx
-        elif hms_idx > idx:
-            hms = info.hms(tokens[hms_idx])
-            new_idx = hms_idx
-        else:
-            # Looking backwards, increment one.
-            hms = info.hms(tokens[hms_idx]) + 1
-            new_idx = idx
-
-        return (new_idx, hms)
-
+        minute = int(value) 
+        second = None 
+ 
+        sec_remainder = value % 1 
+        if sec_remainder: 
+            second = int(60 * sec_remainder) 
+        return (minute, second) 
+ 
+    def _parse_hms(self, idx, tokens, info, hms_idx): 
+        # TODO: Is this going to admit a lot of false-positives for when we 
+        # just happen to have digits and "h", "m" or "s" characters in non-date 
+        # text?  I guess hex hashes won't have that problem, but there's plenty 
+        # of random junk out there. 
+        if hms_idx is None: 
+            hms = None 
+            new_idx = idx 
+        elif hms_idx > idx: 
+            hms = info.hms(tokens[hms_idx]) 
+            new_idx = hms_idx 
+        else: 
+            # Looking backwards, increment one. 
+            hms = info.hms(tokens[hms_idx]) + 1 
+            new_idx = idx 
+ 
+        return (new_idx, hms) 
+ 
     # ------------------------------------------------------------------
     # Handling for individual tokens.  These are kept as methods instead
     #  of functions for the sake of customizability via subclassing.
-
+ 
     def _parsems(self, value):
         """Parse a I[.F] seconds value into (seconds, microseconds)."""
         if "." not in value:
@@ -1137,7 +1137,7 @@ class parser(object):
         else:
             i, f = value.split(".")
             return int(i), int(f.ljust(6, "0")[:6])
-
+ 
     def _to_decimal(self, val):
         try:
             decimal_value = Decimal(val)
@@ -1156,97 +1156,97 @@ class parser(object):
     #  methods instead of functions for the sake of customizability via
     #  subclassing.
 
-    def _build_tzinfo(self, tzinfos, tzname, tzoffset):
-        if callable(tzinfos):
-            tzdata = tzinfos(tzname, tzoffset)
-        else:
-            tzdata = tzinfos.get(tzname)
-        # handle case where tzinfo is paased an options that returns None
-        # eg tzinfos = {'BRST' : None}
-        if isinstance(tzdata, datetime.tzinfo) or tzdata is None:
-            tzinfo = tzdata
-        elif isinstance(tzdata, text_type):
-            tzinfo = tz.tzstr(tzdata)
-        elif isinstance(tzdata, integer_types):
-            tzinfo = tz.tzoffset(tzname, tzdata)
+    def _build_tzinfo(self, tzinfos, tzname, tzoffset): 
+        if callable(tzinfos): 
+            tzdata = tzinfos(tzname, tzoffset) 
+        else: 
+            tzdata = tzinfos.get(tzname) 
+        # handle case where tzinfo is paased an options that returns None 
+        # eg tzinfos = {'BRST' : None} 
+        if isinstance(tzdata, datetime.tzinfo) or tzdata is None: 
+            tzinfo = tzdata 
+        elif isinstance(tzdata, text_type): 
+            tzinfo = tz.tzstr(tzdata) 
+        elif isinstance(tzdata, integer_types): 
+            tzinfo = tz.tzoffset(tzname, tzdata) 
         else:
             raise TypeError("Offset must be tzinfo subclass, tz string, "
                             "or int offset.")
-        return tzinfo
-
-    def _build_tzaware(self, naive, res, tzinfos):
-        if (callable(tzinfos) or (tzinfos and res.tzname in tzinfos)):
-            tzinfo = self._build_tzinfo(tzinfos, res.tzname, res.tzoffset)
-            aware = naive.replace(tzinfo=tzinfo)
-            aware = self._assign_tzname(aware, res.tzname)
-
-        elif res.tzname and res.tzname in time.tzname:
-            aware = naive.replace(tzinfo=tz.tzlocal())
-
-            # Handle ambiguous local datetime
-            aware = self._assign_tzname(aware, res.tzname)
-
-            # This is mostly relevant for winter GMT zones parsed in the UK
-            if (aware.tzname() != res.tzname and
-                    res.tzname in self.info.UTCZONE):
+        return tzinfo 
+ 
+    def _build_tzaware(self, naive, res, tzinfos): 
+        if (callable(tzinfos) or (tzinfos and res.tzname in tzinfos)): 
+            tzinfo = self._build_tzinfo(tzinfos, res.tzname, res.tzoffset) 
+            aware = naive.replace(tzinfo=tzinfo) 
+            aware = self._assign_tzname(aware, res.tzname) 
+ 
+        elif res.tzname and res.tzname in time.tzname: 
+            aware = naive.replace(tzinfo=tz.tzlocal()) 
+ 
+            # Handle ambiguous local datetime 
+            aware = self._assign_tzname(aware, res.tzname) 
+ 
+            # This is mostly relevant for winter GMT zones parsed in the UK 
+            if (aware.tzname() != res.tzname and 
+                    res.tzname in self.info.UTCZONE): 
                 aware = aware.replace(tzinfo=tz.UTC)
-
-        elif res.tzoffset == 0:
+ 
+        elif res.tzoffset == 0: 
             aware = naive.replace(tzinfo=tz.UTC)
-
-        elif res.tzoffset:
-            aware = naive.replace(tzinfo=tz.tzoffset(res.tzname, res.tzoffset))
-
-        elif not res.tzname and not res.tzoffset:
-            # i.e. no timezone information was found.
-            aware = naive
-
-        elif res.tzname:
-            # tz-like string was parsed but we don't know what to do
-            # with it
-            warnings.warn("tzname {tzname} identified but not understood.  "
-                          "Pass `tzinfos` argument in order to correctly "
-                          "return a timezone-aware datetime.  In a future "
-                          "version, this will raise an "
-                          "exception.".format(tzname=res.tzname),
-                          category=UnknownTimezoneWarning)
-            aware = naive
-
-        return aware
-
-    def _build_naive(self, res, default):
-        repl = {}
-        for attr in ("year", "month", "day", "hour",
-                     "minute", "second", "microsecond"):
-            value = getattr(res, attr)
-            if value is not None:
-                repl[attr] = value
-
-        if 'day' not in repl:
-            # If the default day exceeds the last day of the month, fall back
-            # to the end of the month.
-            cyear = default.year if res.year is None else res.year
-            cmonth = default.month if res.month is None else res.month
-            cday = default.day if res.day is None else res.day
-
-            if cday > monthrange(cyear, cmonth)[1]:
-                repl['day'] = monthrange(cyear, cmonth)[1]
-
-        naive = default.replace(**repl)
-
-        if res.weekday is not None and not res.day:
-            naive = naive + relativedelta.relativedelta(weekday=res.weekday)
-
-        return naive
-
-    def _assign_tzname(self, dt, tzname):
-        if dt.tzname() != tzname:
-            new_dt = tz.enfold(dt, fold=1)
-            if new_dt.tzname() == tzname:
-                return new_dt
-
-        return dt
-
+ 
+        elif res.tzoffset: 
+            aware = naive.replace(tzinfo=tz.tzoffset(res.tzname, res.tzoffset)) 
+ 
+        elif not res.tzname and not res.tzoffset: 
+            # i.e. no timezone information was found. 
+            aware = naive 
+ 
+        elif res.tzname: 
+            # tz-like string was parsed but we don't know what to do 
+            # with it 
+            warnings.warn("tzname {tzname} identified but not understood.  " 
+                          "Pass `tzinfos` argument in order to correctly " 
+                          "return a timezone-aware datetime.  In a future " 
+                          "version, this will raise an " 
+                          "exception.".format(tzname=res.tzname), 
+                          category=UnknownTimezoneWarning) 
+            aware = naive 
+ 
+        return aware 
+ 
+    def _build_naive(self, res, default): 
+        repl = {} 
+        for attr in ("year", "month", "day", "hour", 
+                     "minute", "second", "microsecond"): 
+            value = getattr(res, attr) 
+            if value is not None: 
+                repl[attr] = value 
+ 
+        if 'day' not in repl: 
+            # If the default day exceeds the last day of the month, fall back 
+            # to the end of the month. 
+            cyear = default.year if res.year is None else res.year 
+            cmonth = default.month if res.month is None else res.month 
+            cday = default.day if res.day is None else res.day 
+ 
+            if cday > monthrange(cyear, cmonth)[1]: 
+                repl['day'] = monthrange(cyear, cmonth)[1] 
+ 
+        naive = default.replace(**repl) 
+ 
+        if res.weekday is not None and not res.day: 
+            naive = naive + relativedelta.relativedelta(weekday=res.weekday) 
+ 
+        return naive 
+ 
+    def _assign_tzname(self, dt, tzname): 
+        if dt.tzname() != tzname: 
+            new_dt = tz.enfold(dt, fold=1) 
+            if new_dt.tzname() == tzname: 
+                return new_dt 
+ 
+        return dt 
+ 
     def _recombine_skipped(self, tokens, skipped_idxs):
         """
         >>> tokens = ["foo", " ", "bar", " ", "19June2000", "baz"]
@@ -1260,331 +1260,331 @@ class parser(object):
                 skipped_tokens[-1] = skipped_tokens[-1] + tokens[idx]
             else:
                 skipped_tokens.append(tokens[idx])
-
+ 
         return skipped_tokens
-
-
-DEFAULTPARSER = parser()
-
-
-def parse(timestr, parserinfo=None, **kwargs):
-    """
-
-    Parse a string in one of the supported formats, using the
-    ``parserinfo`` parameters.
-
-    :param timestr:
-        A string containing a date/time stamp.
-
-    :param parserinfo:
-        A :class:`parserinfo` object containing parameters for the parser.
-        If ``None``, the default arguments to the :class:`parserinfo`
-        constructor are used.
-
-    The ``**kwargs`` parameter takes the following keyword arguments:
-
-    :param default:
-        The default datetime object, if this is a datetime object and not
-        ``None``, elements specified in ``timestr`` replace elements in the
-        default object.
-
-    :param ignoretz:
-        If set ``True``, time zones in parsed strings are ignored and a naive
-        :class:`datetime` object is returned.
-
-    :param tzinfos:
-        Additional time zone names / aliases which may be present in the
-        string. This argument maps time zone names (and optionally offsets
-        from those time zones) to time zones. This parameter can be a
-        dictionary with timezone aliases mapping time zone names to time
-        zones or a function taking two parameters (``tzname`` and
-        ``tzoffset``) and returning a time zone.
-
-        The timezones to which the names are mapped can be an integer
-        offset from UTC in seconds or a :class:`tzinfo` object.
-
-        .. doctest::
-           :options: +NORMALIZE_WHITESPACE
-
-            >>> from dateutil.parser import parse
-            >>> from dateutil.tz import gettz
-            >>> tzinfos = {"BRST": -7200, "CST": gettz("America/Chicago")}
-            >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos)
-            datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -7200))
-            >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos)
-            datetime.datetime(2012, 1, 19, 17, 21,
-                              tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago'))
-
-        This parameter is ignored if ``ignoretz`` is set.
-
-    :param dayfirst:
-        Whether to interpret the first value in an ambiguous 3-integer date
-        (e.g. 01/05/09) as the day (``True``) or month (``False``). If
-        ``yearfirst`` is set to ``True``, this distinguishes between YDM and
-        YMD. If set to ``None``, this value is retrieved from the current
-        :class:`parserinfo` object (which itself defaults to ``False``).
-
-    :param yearfirst:
-        Whether to interpret the first value in an ambiguous 3-integer date
-        (e.g. 01/05/09) as the year. If ``True``, the first number is taken to
-        be the year, otherwise the last number is taken to be the year. If
-        this is set to ``None``, the value is retrieved from the current
-        :class:`parserinfo` object (which itself defaults to ``False``).
-
-    :param fuzzy:
-        Whether to allow fuzzy parsing, allowing for string like "Today is
-        January 1, 2047 at 8:21:00AM".
-
-    :param fuzzy_with_tokens:
-        If ``True``, ``fuzzy`` is automatically set to True, and the parser
-        will return a tuple where the first element is the parsed
-        :class:`datetime.datetime` datetimestamp and the second element is
-        a tuple containing the portions of the string which were ignored:
-
-        .. doctest::
-
-            >>> from dateutil.parser import parse
-            >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True)
-            (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at '))
-
-    :return:
-        Returns a :class:`datetime.datetime` object or, if the
-        ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the
-        first element being a :class:`datetime.datetime` object, the second
-        a tuple containing the fuzzy tokens.
-
+ 
+
+DEFAULTPARSER = parser() 
+ 
+ 
+def parse(timestr, parserinfo=None, **kwargs): 
+    """ 
+ 
+    Parse a string in one of the supported formats, using the 
+    ``parserinfo`` parameters. 
+ 
+    :param timestr: 
+        A string containing a date/time stamp. 
+ 
+    :param parserinfo: 
+        A :class:`parserinfo` object containing parameters for the parser. 
+        If ``None``, the default arguments to the :class:`parserinfo` 
+        constructor are used. 
+ 
+    The ``**kwargs`` parameter takes the following keyword arguments: 
+ 
+    :param default: 
+        The default datetime object, if this is a datetime object and not 
+        ``None``, elements specified in ``timestr`` replace elements in the 
+        default object. 
+ 
+    :param ignoretz: 
+        If set ``True``, time zones in parsed strings are ignored and a naive 
+        :class:`datetime` object is returned. 
+ 
+    :param tzinfos: 
+        Additional time zone names / aliases which may be present in the 
+        string. This argument maps time zone names (and optionally offsets 
+        from those time zones) to time zones. This parameter can be a 
+        dictionary with timezone aliases mapping time zone names to time 
+        zones or a function taking two parameters (``tzname`` and 
+        ``tzoffset``) and returning a time zone. 
+ 
+        The timezones to which the names are mapped can be an integer 
+        offset from UTC in seconds or a :class:`tzinfo` object. 
+ 
+        .. doctest:: 
+           :options: +NORMALIZE_WHITESPACE 
+ 
+            >>> from dateutil.parser import parse 
+            >>> from dateutil.tz import gettz 
+            >>> tzinfos = {"BRST": -7200, "CST": gettz("America/Chicago")} 
+            >>> parse("2012-01-19 17:21:00 BRST", tzinfos=tzinfos) 
+            datetime.datetime(2012, 1, 19, 17, 21, tzinfo=tzoffset(u'BRST', -7200)) 
+            >>> parse("2012-01-19 17:21:00 CST", tzinfos=tzinfos) 
+            datetime.datetime(2012, 1, 19, 17, 21, 
+                              tzinfo=tzfile('/usr/share/zoneinfo/America/Chicago')) 
+ 
+        This parameter is ignored if ``ignoretz`` is set. 
+ 
+    :param dayfirst: 
+        Whether to interpret the first value in an ambiguous 3-integer date 
+        (e.g. 01/05/09) as the day (``True``) or month (``False``). If 
+        ``yearfirst`` is set to ``True``, this distinguishes between YDM and 
+        YMD. If set to ``None``, this value is retrieved from the current 
+        :class:`parserinfo` object (which itself defaults to ``False``). 
+ 
+    :param yearfirst: 
+        Whether to interpret the first value in an ambiguous 3-integer date 
+        (e.g. 01/05/09) as the year. If ``True``, the first number is taken to 
+        be the year, otherwise the last number is taken to be the year. If 
+        this is set to ``None``, the value is retrieved from the current 
+        :class:`parserinfo` object (which itself defaults to ``False``). 
+ 
+    :param fuzzy: 
+        Whether to allow fuzzy parsing, allowing for string like "Today is 
+        January 1, 2047 at 8:21:00AM". 
+ 
+    :param fuzzy_with_tokens: 
+        If ``True``, ``fuzzy`` is automatically set to True, and the parser 
+        will return a tuple where the first element is the parsed 
+        :class:`datetime.datetime` datetimestamp and the second element is 
+        a tuple containing the portions of the string which were ignored: 
+ 
+        .. doctest:: 
+ 
+            >>> from dateutil.parser import parse 
+            >>> parse("Today is January 1, 2047 at 8:21:00AM", fuzzy_with_tokens=True) 
+            (datetime.datetime(2047, 1, 1, 8, 21), (u'Today is ', u' ', u'at ')) 
+ 
+    :return: 
+        Returns a :class:`datetime.datetime` object or, if the 
+        ``fuzzy_with_tokens`` option is ``True``, returns a tuple, the 
+        first element being a :class:`datetime.datetime` object, the second 
+        a tuple containing the fuzzy tokens. 
+ 
     :raises ParserError:
         Raised for invalid or unknown string formats, if the provided
         :class:`tzinfo` is not in a valid format, or if an invalid date would
         be created.
-
-    :raises OverflowError:
-        Raised if the parsed date exceeds the largest valid C integer on
-        your system.
-    """
-    if parserinfo:
-        return parser(parserinfo).parse(timestr, **kwargs)
-    else:
-        return DEFAULTPARSER.parse(timestr, **kwargs)
-
-
-class _tzparser(object):
-
-    class _result(_resultbase):
-
-        __slots__ = ["stdabbr", "stdoffset", "dstabbr", "dstoffset",
-                     "start", "end"]
-
-        class _attr(_resultbase):
-            __slots__ = ["month", "week", "weekday",
-                         "yday", "jyday", "day", "time"]
-
-        def __repr__(self):
-            return self._repr("")
-
-        def __init__(self):
-            _resultbase.__init__(self)
-            self.start = self._attr()
-            self.end = self._attr()
-
-    def parse(self, tzstr):
-        res = self._result()
-        l = [x for x in re.split(r'([,:.]|[a-zA-Z]+|[0-9]+)',tzstr) if x]
-        used_idxs = list()
-        try:
-
-            len_l = len(l)
-
-            i = 0
-            while i < len_l:
-                # BRST+3[BRDT[+2]]
-                j = i
-                while j < len_l and not [x for x in l[j]
-                                         if x in "0123456789:,-+"]:
-                    j += 1
-                if j != i:
-                    if not res.stdabbr:
-                        offattr = "stdoffset"
-                        res.stdabbr = "".join(l[i:j])
-                    else:
-                        offattr = "dstoffset"
-                        res.dstabbr = "".join(l[i:j])
-
-                    for ii in range(j):
-                        used_idxs.append(ii)
-                    i = j
-                    if (i < len_l and (l[i] in ('+', '-') or l[i][0] in
-                                       "0123456789")):
-                        if l[i] in ('+', '-'):
-                            # Yes, that's right.  See the TZ variable
-                            # documentation.
-                            signal = (1, -1)[l[i] == '+']
-                            used_idxs.append(i)
-                            i += 1
-                        else:
-                            signal = -1
-                        len_li = len(l[i])
-                        if len_li == 4:
-                            # -0300
-                            setattr(res, offattr, (int(l[i][:2]) * 3600 +
-                                                   int(l[i][2:]) * 60) * signal)
-                        elif i + 1 < len_l and l[i + 1] == ':':
-                            # -03:00
-                            setattr(res, offattr,
-                                    (int(l[i]) * 3600 +
-                                     int(l[i + 2]) * 60) * signal)
-                            used_idxs.append(i)
-                            i += 2
-                        elif len_li <= 2:
-                            # -[0]3
-                            setattr(res, offattr,
-                                    int(l[i][:2]) * 3600 * signal)
-                        else:
-                            return None
-                        used_idxs.append(i)
-                        i += 1
-                    if res.dstabbr:
-                        break
-                else:
-                    break
-
-
-            if i < len_l:
-                for j in range(i, len_l):
-                    if l[j] == ';':
-                        l[j] = ','
-
-                assert l[i] == ','
-
-                i += 1
-
-            if i >= len_l:
-                pass
-            elif (8 <= l.count(',') <= 9 and
-                  not [y for x in l[i:] if x != ','
-                       for y in x if y not in "0123456789+-"]):
-                # GMT0BST,3,0,30,3600,10,0,26,7200[,3600]
-                for x in (res.start, res.end):
-                    x.month = int(l[i])
-                    used_idxs.append(i)
-                    i += 2
-                    if l[i] == '-':
-                        value = int(l[i + 1]) * -1
-                        used_idxs.append(i)
-                        i += 1
-                    else:
-                        value = int(l[i])
-                    used_idxs.append(i)
-                    i += 2
-                    if value:
-                        x.week = value
-                        x.weekday = (int(l[i]) - 1) % 7
-                    else:
-                        x.day = int(l[i])
-                    used_idxs.append(i)
-                    i += 2
-                    x.time = int(l[i])
-                    used_idxs.append(i)
-                    i += 2
-                if i < len_l:
-                    if l[i] in ('-', '+'):
-                        signal = (-1, 1)[l[i] == "+"]
-                        used_idxs.append(i)
-                        i += 1
-                    else:
-                        signal = 1
-                    used_idxs.append(i)
-                    res.dstoffset = (res.stdoffset + int(l[i]) * signal)
-
-                # This was a made-up format that is not in normal use
-                warn(('Parsed time zone "%s"' % tzstr) +
-                     'is in a non-standard dateutil-specific format, which ' +
-                     'is now deprecated; support for parsing this format ' +
-                     'will be removed in future versions. It is recommended ' +
-                     'that you switch to a standard format like the GNU ' +
-                     'TZ variable format.', tz.DeprecatedTzFormatWarning)
-            elif (l.count(',') == 2 and l[i:].count('/') <= 2 and
-                  not [y for x in l[i:] if x not in (',', '/', 'J', 'M',
-                                                     '.', '-', ':')
-                       for y in x if y not in "0123456789"]):
-                for x in (res.start, res.end):
-                    if l[i] == 'J':
-                        # non-leap year day (1 based)
-                        used_idxs.append(i)
-                        i += 1
-                        x.jyday = int(l[i])
-                    elif l[i] == 'M':
-                        # month[-.]week[-.]weekday
-                        used_idxs.append(i)
-                        i += 1
-                        x.month = int(l[i])
-                        used_idxs.append(i)
-                        i += 1
-                        assert l[i] in ('-', '.')
-                        used_idxs.append(i)
-                        i += 1
-                        x.week = int(l[i])
-                        if x.week == 5:
-                            x.week = -1
-                        used_idxs.append(i)
-                        i += 1
-                        assert l[i] in ('-', '.')
-                        used_idxs.append(i)
-                        i += 1
-                        x.weekday = (int(l[i]) - 1) % 7
-                    else:
-                        # year day (zero based)
-                        x.yday = int(l[i]) + 1
-
-                    used_idxs.append(i)
-                    i += 1
-
-                    if i < len_l and l[i] == '/':
-                        used_idxs.append(i)
-                        i += 1
-                        # start time
-                        len_li = len(l[i])
-                        if len_li == 4:
-                            # -0300
-                            x.time = (int(l[i][:2]) * 3600 +
-                                      int(l[i][2:]) * 60)
-                        elif i + 1 < len_l and l[i + 1] == ':':
-                            # -03:00
-                            x.time = int(l[i]) * 3600 + int(l[i + 2]) * 60
-                            used_idxs.append(i)
-                            i += 2
-                            if i + 1 < len_l and l[i + 1] == ':':
-                                used_idxs.append(i)
-                                i += 2
-                                x.time += int(l[i])
-                        elif len_li <= 2:
-                            # -[0]3
-                            x.time = (int(l[i][:2]) * 3600)
-                        else:
-                            return None
-                        used_idxs.append(i)
-                        i += 1
-
-                    assert i == len_l or l[i] == ','
-
-                    i += 1
-
-                assert i >= len_l
-
-        except (IndexError, ValueError, AssertionError):
-            return None
-
-        unused_idxs = set(range(len_l)).difference(used_idxs)
-        res.any_unused_tokens = not {l[n] for n in unused_idxs}.issubset({",",":"})
-        return res
-
-
-DEFAULTTZPARSER = _tzparser()
-
-
-def _parsetz(tzstr):
-    return DEFAULTTZPARSER.parse(tzstr)
-
+ 
+    :raises OverflowError: 
+        Raised if the parsed date exceeds the largest valid C integer on 
+        your system. 
+    """ 
+    if parserinfo: 
+        return parser(parserinfo).parse(timestr, **kwargs) 
+    else: 
+        return DEFAULTPARSER.parse(timestr, **kwargs) 
+ 
+ 
+class _tzparser(object): 
+ 
+    class _result(_resultbase): 
+ 
+        __slots__ = ["stdabbr", "stdoffset", "dstabbr", "dstoffset", 
+                     "start", "end"] 
+ 
+        class _attr(_resultbase): 
+            __slots__ = ["month", "week", "weekday", 
+                         "yday", "jyday", "day", "time"] 
+ 
+        def __repr__(self): 
+            return self._repr("") 
+ 
+        def __init__(self): 
+            _resultbase.__init__(self) 
+            self.start = self._attr() 
+            self.end = self._attr() 
+ 
+    def parse(self, tzstr): 
+        res = self._result() 
+        l = [x for x in re.split(r'([,:.]|[a-zA-Z]+|[0-9]+)',tzstr) if x] 
+        used_idxs = list() 
+        try: 
+ 
+            len_l = len(l) 
+ 
+            i = 0 
+            while i < len_l: 
+                # BRST+3[BRDT[+2]] 
+                j = i 
+                while j < len_l and not [x for x in l[j] 
+                                         if x in "0123456789:,-+"]: 
+                    j += 1 
+                if j != i: 
+                    if not res.stdabbr: 
+                        offattr = "stdoffset" 
+                        res.stdabbr = "".join(l[i:j]) 
+                    else: 
+                        offattr = "dstoffset" 
+                        res.dstabbr = "".join(l[i:j]) 
+ 
+                    for ii in range(j): 
+                        used_idxs.append(ii) 
+                    i = j 
+                    if (i < len_l and (l[i] in ('+', '-') or l[i][0] in 
+                                       "0123456789")): 
+                        if l[i] in ('+', '-'): 
+                            # Yes, that's right.  See the TZ variable 
+                            # documentation. 
+                            signal = (1, -1)[l[i] == '+'] 
+                            used_idxs.append(i) 
+                            i += 1 
+                        else: 
+                            signal = -1 
+                        len_li = len(l[i]) 
+                        if len_li == 4: 
+                            # -0300 
+                            setattr(res, offattr, (int(l[i][:2]) * 3600 + 
+                                                   int(l[i][2:]) * 60) * signal) 
+                        elif i + 1 < len_l and l[i + 1] == ':': 
+                            # -03:00 
+                            setattr(res, offattr, 
+                                    (int(l[i]) * 3600 + 
+                                     int(l[i + 2]) * 60) * signal) 
+                            used_idxs.append(i) 
+                            i += 2 
+                        elif len_li <= 2: 
+                            # -[0]3 
+                            setattr(res, offattr, 
+                                    int(l[i][:2]) * 3600 * signal) 
+                        else: 
+                            return None 
+                        used_idxs.append(i) 
+                        i += 1 
+                    if res.dstabbr: 
+                        break 
+                else: 
+                    break 
+ 
+ 
+            if i < len_l: 
+                for j in range(i, len_l): 
+                    if l[j] == ';': 
+                        l[j] = ',' 
+ 
+                assert l[i] == ',' 
+ 
+                i += 1 
+ 
+            if i >= len_l: 
+                pass 
+            elif (8 <= l.count(',') <= 9 and 
+                  not [y for x in l[i:] if x != ',' 
+                       for y in x if y not in "0123456789+-"]): 
+                # GMT0BST,3,0,30,3600,10,0,26,7200[,3600] 
+                for x in (res.start, res.end): 
+                    x.month = int(l[i]) 
+                    used_idxs.append(i) 
+                    i += 2 
+                    if l[i] == '-': 
+                        value = int(l[i + 1]) * -1 
+                        used_idxs.append(i) 
+                        i += 1 
+                    else: 
+                        value = int(l[i]) 
+                    used_idxs.append(i) 
+                    i += 2 
+                    if value: 
+                        x.week = value 
+                        x.weekday = (int(l[i]) - 1) % 7 
+                    else: 
+                        x.day = int(l[i]) 
+                    used_idxs.append(i) 
+                    i += 2 
+                    x.time = int(l[i]) 
+                    used_idxs.append(i) 
+                    i += 2 
+                if i < len_l: 
+                    if l[i] in ('-', '+'): 
+                        signal = (-1, 1)[l[i] == "+"] 
+                        used_idxs.append(i) 
+                        i += 1 
+                    else: 
+                        signal = 1 
+                    used_idxs.append(i) 
+                    res.dstoffset = (res.stdoffset + int(l[i]) * signal) 
+ 
+                # This was a made-up format that is not in normal use 
+                warn(('Parsed time zone "%s"' % tzstr) + 
+                     'is in a non-standard dateutil-specific format, which ' + 
+                     'is now deprecated; support for parsing this format ' + 
+                     'will be removed in future versions. It is recommended ' + 
+                     'that you switch to a standard format like the GNU ' + 
+                     'TZ variable format.', tz.DeprecatedTzFormatWarning) 
+            elif (l.count(',') == 2 and l[i:].count('/') <= 2 and 
+                  not [y for x in l[i:] if x not in (',', '/', 'J', 'M', 
+                                                     '.', '-', ':') 
+                       for y in x if y not in "0123456789"]): 
+                for x in (res.start, res.end): 
+                    if l[i] == 'J': 
+                        # non-leap year day (1 based) 
+                        used_idxs.append(i) 
+                        i += 1 
+                        x.jyday = int(l[i]) 
+                    elif l[i] == 'M': 
+                        # month[-.]week[-.]weekday 
+                        used_idxs.append(i) 
+                        i += 1 
+                        x.month = int(l[i]) 
+                        used_idxs.append(i) 
+                        i += 1 
+                        assert l[i] in ('-', '.') 
+                        used_idxs.append(i) 
+                        i += 1 
+                        x.week = int(l[i]) 
+                        if x.week == 5: 
+                            x.week = -1 
+                        used_idxs.append(i) 
+                        i += 1 
+                        assert l[i] in ('-', '.') 
+                        used_idxs.append(i) 
+                        i += 1 
+                        x.weekday = (int(l[i]) - 1) % 7 
+                    else: 
+                        # year day (zero based) 
+                        x.yday = int(l[i]) + 1 
+ 
+                    used_idxs.append(i) 
+                    i += 1 
+ 
+                    if i < len_l and l[i] == '/': 
+                        used_idxs.append(i) 
+                        i += 1 
+                        # start time 
+                        len_li = len(l[i]) 
+                        if len_li == 4: 
+                            # -0300 
+                            x.time = (int(l[i][:2]) * 3600 + 
+                                      int(l[i][2:]) * 60) 
+                        elif i + 1 < len_l and l[i + 1] == ':': 
+                            # -03:00 
+                            x.time = int(l[i]) * 3600 + int(l[i + 2]) * 60 
+                            used_idxs.append(i) 
+                            i += 2 
+                            if i + 1 < len_l and l[i + 1] == ':': 
+                                used_idxs.append(i) 
+                                i += 2 
+                                x.time += int(l[i]) 
+                        elif len_li <= 2: 
+                            # -[0]3 
+                            x.time = (int(l[i][:2]) * 3600) 
+                        else: 
+                            return None 
+                        used_idxs.append(i) 
+                        i += 1 
+ 
+                    assert i == len_l or l[i] == ',' 
+ 
+                    i += 1 
+ 
+                assert i >= len_l 
+ 
+        except (IndexError, ValueError, AssertionError): 
+            return None 
+ 
+        unused_idxs = set(range(len_l)).difference(used_idxs) 
+        res.any_unused_tokens = not {l[n] for n in unused_idxs}.issubset({",",":"}) 
+        return res 
+ 
+ 
+DEFAULTTZPARSER = _tzparser() 
+ 
+ 
+def _parsetz(tzstr): 
+    return DEFAULTTZPARSER.parse(tzstr) 
+ 
 
 class ParserError(ValueError):
     """Exception subclass used for any failure to parse a datetime string.
@@ -1605,9 +1605,9 @@ class ParserError(ValueError):
         return "%s(%s)" % (self.__class__.__name__, args)
 
 
-class UnknownTimezoneWarning(RuntimeWarning):
+class UnknownTimezoneWarning(RuntimeWarning): 
     """Raised when the parser finds a timezone it cannot parse into a tzinfo.
 
     .. versionadded:: 2.7.0
     """
-# vim:ts=4:sw=4:et
+# vim:ts=4:sw=4:et 
diff --git a/contrib/python/dateutil/dateutil/parser/isoparser.py b/contrib/python/dateutil/dateutil/parser/isoparser.py
index 5d7bee3800..f01a196757 100644
--- a/contrib/python/dateutil/dateutil/parser/isoparser.py
+++ b/contrib/python/dateutil/dateutil/parser/isoparser.py
@@ -1,352 +1,352 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers a parser for ISO-8601 strings
-
-It is intended to support all valid date, time and datetime formats per the
-ISO-8601 specification.
-
-..versionadded:: 2.7.0
-"""
-from datetime import datetime, timedelta, time, date
-import calendar
-from dateutil import tz
-
-from functools import wraps
-
-import re
-import six
-
-__all__ = ["isoparse", "isoparser"]
-
-
-def _takes_ascii(f):
-    @wraps(f)
-    def func(self, str_in, *args, **kwargs):
-        # If it's a stream, read the whole thing
-        str_in = getattr(str_in, 'read', lambda: str_in)()
-
-        # If it's unicode, turn it into bytes, since ISO-8601 only covers ASCII
-        if isinstance(str_in, six.text_type):
-            # ASCII is the same in UTF-8
-            try:
-                str_in = str_in.encode('ascii')
-            except UnicodeEncodeError as e:
-                msg = 'ISO-8601 strings should contain only ASCII characters'
-                six.raise_from(ValueError(msg), e)
-
-        return f(self, str_in, *args, **kwargs)
-
-    return func
-
-
-class isoparser(object):
-    def __init__(self, sep=None):
-        """
-        :param sep:
-            A single character that separates date and time portions. If
-            ``None``, the parser will accept any single character.
-            For strict ISO-8601 adherence, pass ``'T'``.
-        """
-        if sep is not None:
-            if (len(sep) != 1 or ord(sep) >= 128 or sep in '0123456789'):
-                raise ValueError('Separator must be a single, non-numeric ' +
-                                 'ASCII character')
-
-            sep = sep.encode('ascii')
-
-        self._sep = sep
-
-    @_takes_ascii
-    def isoparse(self, dt_str):
-        """
-        Parse an ISO-8601 datetime string into a :class:`datetime.datetime`.
-
-        An ISO-8601 datetime string consists of a date portion, followed
-        optionally by a time portion - the date and time portions are separated
-        by a single character separator, which is ``T`` in the official
-        standard. Incomplete date formats (such as ``YYYY-MM``) may *not* be
-        combined with a time portion.
-
-        Supported date formats are:
-
-        Common:
-
-        - ``YYYY``
-        - ``YYYY-MM`` or ``YYYYMM``
-        - ``YYYY-MM-DD`` or ``YYYYMMDD``
-
-        Uncommon:
-
-        - ``YYYY-Www`` or ``YYYYWww`` - ISO week (day defaults to 0)
-        - ``YYYY-Www-D`` or ``YYYYWwwD`` - ISO week and day
-
-        The ISO week and day numbering follows the same logic as
-        :func:`datetime.date.isocalendar`.
-
-        Supported time formats are:
-
-        - ``hh``
-        - ``hh:mm`` or ``hhmm``
-        - ``hh:mm:ss`` or ``hhmmss``
+# -*- coding: utf-8 -*- 
+""" 
+This module offers a parser for ISO-8601 strings 
+ 
+It is intended to support all valid date, time and datetime formats per the 
+ISO-8601 specification. 
+ 
+..versionadded:: 2.7.0 
+""" 
+from datetime import datetime, timedelta, time, date 
+import calendar 
+from dateutil import tz 
+ 
+from functools import wraps 
+ 
+import re 
+import six 
+ 
+__all__ = ["isoparse", "isoparser"] 
+ 
+ 
+def _takes_ascii(f): 
+    @wraps(f) 
+    def func(self, str_in, *args, **kwargs): 
+        # If it's a stream, read the whole thing 
+        str_in = getattr(str_in, 'read', lambda: str_in)() 
+ 
+        # If it's unicode, turn it into bytes, since ISO-8601 only covers ASCII 
+        if isinstance(str_in, six.text_type): 
+            # ASCII is the same in UTF-8 
+            try: 
+                str_in = str_in.encode('ascii') 
+            except UnicodeEncodeError as e: 
+                msg = 'ISO-8601 strings should contain only ASCII characters' 
+                six.raise_from(ValueError(msg), e) 
+ 
+        return f(self, str_in, *args, **kwargs) 
+ 
+    return func 
+ 
+ 
+class isoparser(object): 
+    def __init__(self, sep=None): 
+        """ 
+        :param sep: 
+            A single character that separates date and time portions. If 
+            ``None``, the parser will accept any single character. 
+            For strict ISO-8601 adherence, pass ``'T'``. 
+        """ 
+        if sep is not None: 
+            if (len(sep) != 1 or ord(sep) >= 128 or sep in '0123456789'): 
+                raise ValueError('Separator must be a single, non-numeric ' + 
+                                 'ASCII character') 
+ 
+            sep = sep.encode('ascii') 
+ 
+        self._sep = sep 
+ 
+    @_takes_ascii 
+    def isoparse(self, dt_str): 
+        """ 
+        Parse an ISO-8601 datetime string into a :class:`datetime.datetime`. 
+ 
+        An ISO-8601 datetime string consists of a date portion, followed 
+        optionally by a time portion - the date and time portions are separated 
+        by a single character separator, which is ``T`` in the official 
+        standard. Incomplete date formats (such as ``YYYY-MM``) may *not* be 
+        combined with a time portion. 
+ 
+        Supported date formats are: 
+ 
+        Common: 
+ 
+        - ``YYYY`` 
+        - ``YYYY-MM`` or ``YYYYMM`` 
+        - ``YYYY-MM-DD`` or ``YYYYMMDD`` 
+ 
+        Uncommon: 
+ 
+        - ``YYYY-Www`` or ``YYYYWww`` - ISO week (day defaults to 0) 
+        - ``YYYY-Www-D`` or ``YYYYWwwD`` - ISO week and day 
+ 
+        The ISO week and day numbering follows the same logic as 
+        :func:`datetime.date.isocalendar`. 
+ 
+        Supported time formats are: 
+ 
+        - ``hh`` 
+        - ``hh:mm`` or ``hhmm`` 
+        - ``hh:mm:ss`` or ``hhmmss`` 
         - ``hh:mm:ss.ssssss`` (Up to 6 sub-second digits)
-
-        Midnight is a special case for `hh`, as the standard supports both
+ 
+        Midnight is a special case for `hh`, as the standard supports both 
         00:00 and 24:00 as a representation. The decimal separator can be
         either a dot or a comma.
-
-
-        .. caution::
-
-            Support for fractional components other than seconds is part of the
-            ISO-8601 standard, but is not currently implemented in this parser.
-
-        Supported time zone offset formats are:
-
-        - `Z` (UTC)
-        - `±HH:MM`
-        - `±HHMM`
-        - `±HH`
-
-        Offsets will be represented as :class:`dateutil.tz.tzoffset` objects,
-        with the exception of UTC, which will be represented as
-        :class:`dateutil.tz.tzutc`. Time zone offsets equivalent to UTC (such
-        as `+00:00`) will also be represented as :class:`dateutil.tz.tzutc`.
-
-        :param dt_str:
-            A string or stream containing only an ISO-8601 datetime string
-
-        :return:
-            Returns a :class:`datetime.datetime` representing the string.
-            Unspecified components default to their lowest value.
-
-        .. warning::
-
-            As of version 2.7.0, the strictness of the parser should not be
-            considered a stable part of the contract. Any valid ISO-8601 string
-            that parses correctly with the default settings will continue to
-            parse correctly in future versions, but invalid strings that
-            currently fail (e.g. ``2017-01-01T00:00+00:00:00``) are not
-            guaranteed to continue failing in future versions if they encode
-            a valid date.
-
-        .. versionadded:: 2.7.0
-        """
-        components, pos = self._parse_isodate(dt_str)
-
-        if len(dt_str) > pos:
-            if self._sep is None or dt_str[pos:pos + 1] == self._sep:
-                components += self._parse_isotime(dt_str[pos + 1:])
-            else:
-                raise ValueError('String contains unknown ISO components')
-
+ 
+
+        .. caution:: 
+ 
+            Support for fractional components other than seconds is part of the 
+            ISO-8601 standard, but is not currently implemented in this parser. 
+ 
+        Supported time zone offset formats are: 
+ 
+        - `Z` (UTC) 
+        - `±HH:MM` 
+        - `±HHMM` 
+        - `±HH` 
+ 
+        Offsets will be represented as :class:`dateutil.tz.tzoffset` objects, 
+        with the exception of UTC, which will be represented as 
+        :class:`dateutil.tz.tzutc`. Time zone offsets equivalent to UTC (such 
+        as `+00:00`) will also be represented as :class:`dateutil.tz.tzutc`. 
+ 
+        :param dt_str: 
+            A string or stream containing only an ISO-8601 datetime string 
+ 
+        :return: 
+            Returns a :class:`datetime.datetime` representing the string. 
+            Unspecified components default to their lowest value. 
+ 
+        .. warning:: 
+ 
+            As of version 2.7.0, the strictness of the parser should not be 
+            considered a stable part of the contract. Any valid ISO-8601 string 
+            that parses correctly with the default settings will continue to 
+            parse correctly in future versions, but invalid strings that 
+            currently fail (e.g. ``2017-01-01T00:00+00:00:00``) are not 
+            guaranteed to continue failing in future versions if they encode 
+            a valid date. 
+ 
+        .. versionadded:: 2.7.0 
+        """ 
+        components, pos = self._parse_isodate(dt_str) 
+ 
+        if len(dt_str) > pos: 
+            if self._sep is None or dt_str[pos:pos + 1] == self._sep: 
+                components += self._parse_isotime(dt_str[pos + 1:]) 
+            else: 
+                raise ValueError('String contains unknown ISO components') 
+ 
         if len(components) > 3 and components[3] == 24:
             components[3] = 0
             return datetime(*components) + timedelta(days=1)
 
-        return datetime(*components)
-
-    @_takes_ascii
-    def parse_isodate(self, datestr):
-        """
-        Parse the date portion of an ISO string.
-
-        :param datestr:
-            The string portion of an ISO string, without a separator
-
-        :return:
-            Returns a :class:`datetime.date` object
-        """
-        components, pos = self._parse_isodate(datestr)
-        if pos < len(datestr):
-            raise ValueError('String contains unknown ISO ' +
+        return datetime(*components) 
+ 
+    @_takes_ascii 
+    def parse_isodate(self, datestr): 
+        """ 
+        Parse the date portion of an ISO string. 
+ 
+        :param datestr: 
+            The string portion of an ISO string, without a separator 
+ 
+        :return: 
+            Returns a :class:`datetime.date` object 
+        """ 
+        components, pos = self._parse_isodate(datestr) 
+        if pos < len(datestr): 
+            raise ValueError('String contains unknown ISO ' + 
                              'components: {!r}'.format(datestr.decode('ascii')))
-        return date(*components)
-
-    @_takes_ascii
-    def parse_isotime(self, timestr):
-        """
-        Parse the time portion of an ISO string.
-
-        :param timestr:
-            The time portion of an ISO string, without a separator
-
-        :return:
-            Returns a :class:`datetime.time` object
-        """
+        return date(*components) 
+ 
+    @_takes_ascii 
+    def parse_isotime(self, timestr): 
+        """ 
+        Parse the time portion of an ISO string. 
+ 
+        :param timestr: 
+            The time portion of an ISO string, without a separator 
+ 
+        :return: 
+            Returns a :class:`datetime.time` object 
+        """ 
         components = self._parse_isotime(timestr)
         if components[0] == 24:
             components[0] = 0
         return time(*components)
-
-    @_takes_ascii
-    def parse_tzstr(self, tzstr, zero_as_utc=True):
-        """
-        Parse a valid ISO time zone string.
-
-        See :func:`isoparser.isoparse` for details on supported formats.
-
-        :param tzstr:
-            A string representing an ISO time zone offset
-
-        :param zero_as_utc:
-            Whether to return :class:`dateutil.tz.tzutc` for zero-offset zones
-
-        :return:
-            Returns :class:`dateutil.tz.tzoffset` for offsets and
-            :class:`dateutil.tz.tzutc` for ``Z`` and (if ``zero_as_utc`` is
-            specified) offsets equivalent to UTC.
-        """
-        return self._parse_tzstr(tzstr, zero_as_utc=zero_as_utc)
-
-    # Constants
-    _DATE_SEP = b'-'
-    _TIME_SEP = b':'
+ 
+    @_takes_ascii 
+    def parse_tzstr(self, tzstr, zero_as_utc=True): 
+        """ 
+        Parse a valid ISO time zone string. 
+ 
+        See :func:`isoparser.isoparse` for details on supported formats. 
+ 
+        :param tzstr: 
+            A string representing an ISO time zone offset 
+ 
+        :param zero_as_utc: 
+            Whether to return :class:`dateutil.tz.tzutc` for zero-offset zones 
+ 
+        :return: 
+            Returns :class:`dateutil.tz.tzoffset` for offsets and 
+            :class:`dateutil.tz.tzutc` for ``Z`` and (if ``zero_as_utc`` is 
+            specified) offsets equivalent to UTC. 
+        """ 
+        return self._parse_tzstr(tzstr, zero_as_utc=zero_as_utc) 
+ 
+    # Constants 
+    _DATE_SEP = b'-' 
+    _TIME_SEP = b':' 
     _FRACTION_REGEX = re.compile(b'[\\.,]([0-9]+)')
-
-    def _parse_isodate(self, dt_str):
-        try:
-            return self._parse_isodate_common(dt_str)
-        except ValueError:
-            return self._parse_isodate_uncommon(dt_str)
-
-    def _parse_isodate_common(self, dt_str):
-        len_str = len(dt_str)
-        components = [1, 1, 1]
-
-        if len_str < 4:
-            raise ValueError('ISO string too short')
-
-        # Year
-        components[0] = int(dt_str[0:4])
-        pos = 4
-        if pos >= len_str:
-            return components, pos
-
-        has_sep = dt_str[pos:pos + 1] == self._DATE_SEP
-        if has_sep:
-            pos += 1
-
-        # Month
-        if len_str - pos < 2:
-            raise ValueError('Invalid common month')
-
-        components[1] = int(dt_str[pos:pos + 2])
-        pos += 2
-
-        if pos >= len_str:
-            if has_sep:
-                return components, pos
-            else:
-                raise ValueError('Invalid ISO format')
-
-        if has_sep:
-            if dt_str[pos:pos + 1] != self._DATE_SEP:
-                raise ValueError('Invalid separator in ISO string')
-            pos += 1
-
-        # Day
-        if len_str - pos < 2:
-            raise ValueError('Invalid common day')
-        components[2] = int(dt_str[pos:pos + 2])
-        return components, pos + 2
-
-    def _parse_isodate_uncommon(self, dt_str):
-        if len(dt_str) < 4:
-            raise ValueError('ISO string too short')
-
-        # All ISO formats start with the year
-        year = int(dt_str[0:4])
-
-        has_sep = dt_str[4:5] == self._DATE_SEP
-
-        pos = 4 + has_sep       # Skip '-' if it's there
-        if dt_str[pos:pos + 1] == b'W':
-            # YYYY-?Www-?D?
-            pos += 1
-            weekno = int(dt_str[pos:pos + 2])
-            pos += 2
-
-            dayno = 1
-            if len(dt_str) > pos:
-                if (dt_str[pos:pos + 1] == self._DATE_SEP) != has_sep:
-                    raise ValueError('Inconsistent use of dash separator')
-
-                pos += has_sep
-
-                dayno = int(dt_str[pos:pos + 1])
-                pos += 1
-
-            base_date = self._calculate_weekdate(year, weekno, dayno)
-        else:
-            # YYYYDDD or YYYY-DDD
-            if len(dt_str) - pos < 3:
-                raise ValueError('Invalid ordinal day')
-
-            ordinal_day = int(dt_str[pos:pos + 3])
-            pos += 3
-
-            if ordinal_day < 1 or ordinal_day > (365 + calendar.isleap(year)):
-                raise ValueError('Invalid ordinal day' +
-                                 ' {} for year {}'.format(ordinal_day, year))
-
-            base_date = date(year, 1, 1) + timedelta(days=ordinal_day - 1)
-
-        components = [base_date.year, base_date.month, base_date.day]
-        return components, pos
-
-    def _calculate_weekdate(self, year, week, day):
-        """
-        Calculate the day of corresponding to the ISO year-week-day calendar.
-
-        This function is effectively the inverse of
-        :func:`datetime.date.isocalendar`.
-
-        :param year:
-            The year in the ISO calendar
-
-        :param week:
-            The week in the ISO calendar - range is [1, 53]
-
-        :param day:
-            The day in the ISO calendar - range is [1 (MON), 7 (SUN)]
-
-        :return:
-            Returns a :class:`datetime.date`
-        """
-        if not 0 < week < 54:
-            raise ValueError('Invalid week: {}'.format(week))
-
-        if not 0 < day < 8:     # Range is 1-7
-            raise ValueError('Invalid weekday: {}'.format(day))
-
-        # Get week 1 for the specific year:
-        jan_4 = date(year, 1, 4)   # Week 1 always has January 4th in it
-        week_1 = jan_4 - timedelta(days=jan_4.isocalendar()[2] - 1)
-
-        # Now add the specific number of weeks and days to get what we want
-        week_offset = (week - 1) * 7 + (day - 1)
-        return week_1 + timedelta(days=week_offset)
-
-    def _parse_isotime(self, timestr):
-        len_str = len(timestr)
-        components = [0, 0, 0, 0, None]
-        pos = 0
-        comp = -1
-
+ 
+    def _parse_isodate(self, dt_str): 
+        try: 
+            return self._parse_isodate_common(dt_str) 
+        except ValueError: 
+            return self._parse_isodate_uncommon(dt_str) 
+ 
+    def _parse_isodate_common(self, dt_str): 
+        len_str = len(dt_str) 
+        components = [1, 1, 1] 
+ 
+        if len_str < 4: 
+            raise ValueError('ISO string too short') 
+ 
+        # Year 
+        components[0] = int(dt_str[0:4]) 
+        pos = 4 
+        if pos >= len_str: 
+            return components, pos 
+ 
+        has_sep = dt_str[pos:pos + 1] == self._DATE_SEP 
+        if has_sep: 
+            pos += 1 
+ 
+        # Month 
+        if len_str - pos < 2: 
+            raise ValueError('Invalid common month') 
+ 
+        components[1] = int(dt_str[pos:pos + 2]) 
+        pos += 2 
+ 
+        if pos >= len_str: 
+            if has_sep: 
+                return components, pos 
+            else: 
+                raise ValueError('Invalid ISO format') 
+ 
+        if has_sep: 
+            if dt_str[pos:pos + 1] != self._DATE_SEP: 
+                raise ValueError('Invalid separator in ISO string') 
+            pos += 1 
+ 
+        # Day 
+        if len_str - pos < 2: 
+            raise ValueError('Invalid common day') 
+        components[2] = int(dt_str[pos:pos + 2]) 
+        return components, pos + 2 
+ 
+    def _parse_isodate_uncommon(self, dt_str): 
+        if len(dt_str) < 4: 
+            raise ValueError('ISO string too short') 
+ 
+        # All ISO formats start with the year 
+        year = int(dt_str[0:4]) 
+ 
+        has_sep = dt_str[4:5] == self._DATE_SEP 
+ 
+        pos = 4 + has_sep       # Skip '-' if it's there 
+        if dt_str[pos:pos + 1] == b'W': 
+            # YYYY-?Www-?D? 
+            pos += 1 
+            weekno = int(dt_str[pos:pos + 2]) 
+            pos += 2 
+ 
+            dayno = 1 
+            if len(dt_str) > pos: 
+                if (dt_str[pos:pos + 1] == self._DATE_SEP) != has_sep: 
+                    raise ValueError('Inconsistent use of dash separator') 
+ 
+                pos += has_sep 
+ 
+                dayno = int(dt_str[pos:pos + 1]) 
+                pos += 1 
+ 
+            base_date = self._calculate_weekdate(year, weekno, dayno) 
+        else: 
+            # YYYYDDD or YYYY-DDD 
+            if len(dt_str) - pos < 3: 
+                raise ValueError('Invalid ordinal day') 
+ 
+            ordinal_day = int(dt_str[pos:pos + 3]) 
+            pos += 3 
+ 
+            if ordinal_day < 1 or ordinal_day > (365 + calendar.isleap(year)): 
+                raise ValueError('Invalid ordinal day' + 
+                                 ' {} for year {}'.format(ordinal_day, year)) 
+ 
+            base_date = date(year, 1, 1) + timedelta(days=ordinal_day - 1) 
+ 
+        components = [base_date.year, base_date.month, base_date.day] 
+        return components, pos 
+ 
+    def _calculate_weekdate(self, year, week, day): 
+        """ 
+        Calculate the day of corresponding to the ISO year-week-day calendar. 
+ 
+        This function is effectively the inverse of 
+        :func:`datetime.date.isocalendar`. 
+ 
+        :param year: 
+            The year in the ISO calendar 
+ 
+        :param week: 
+            The week in the ISO calendar - range is [1, 53] 
+ 
+        :param day: 
+            The day in the ISO calendar - range is [1 (MON), 7 (SUN)] 
+ 
+        :return: 
+            Returns a :class:`datetime.date` 
+        """ 
+        if not 0 < week < 54: 
+            raise ValueError('Invalid week: {}'.format(week)) 
+ 
+        if not 0 < day < 8:     # Range is 1-7 
+            raise ValueError('Invalid weekday: {}'.format(day)) 
+ 
+        # Get week 1 for the specific year: 
+        jan_4 = date(year, 1, 4)   # Week 1 always has January 4th in it 
+        week_1 = jan_4 - timedelta(days=jan_4.isocalendar()[2] - 1) 
+ 
+        # Now add the specific number of weeks and days to get what we want 
+        week_offset = (week - 1) * 7 + (day - 1) 
+        return week_1 + timedelta(days=week_offset) 
+ 
+    def _parse_isotime(self, timestr): 
+        len_str = len(timestr) 
+        components = [0, 0, 0, 0, None] 
+        pos = 0 
+        comp = -1 
+ 
         if len_str < 2:
-            raise ValueError('ISO time too short')
-
+            raise ValueError('ISO time too short') 
+ 
         has_sep = False
-
-        while pos < len_str and comp < 5:
-            comp += 1
-
+ 
+        while pos < len_str and comp < 5: 
+            comp += 1 
+ 
             if timestr[pos:pos + 1] in b'-+Zz':
-                # Detect time zone boundary
-                components[-1] = self._parse_tzstr(timestr[pos:])
-                pos = len_str
-                break
-
+                # Detect time zone boundary 
+                components[-1] = self._parse_tzstr(timestr[pos:]) 
+                pos = len_str 
+                break 
+ 
             if comp == 1 and timestr[pos:pos+1] == self._TIME_SEP:
                 has_sep = True
                 pos += 1
@@ -355,62 +355,62 @@ class isoparser(object):
                     raise ValueError('Inconsistent use of colon separator')
                 pos += 1
 
-            if comp < 3:
-                # Hour, minute, second
-                components[comp] = int(timestr[pos:pos + 2])
-                pos += 2
-
-            if comp == 3:
+            if comp < 3: 
+                # Hour, minute, second 
+                components[comp] = int(timestr[pos:pos + 2]) 
+                pos += 2 
+ 
+            if comp == 3: 
                 # Fraction of a second
                 frac = self._FRACTION_REGEX.match(timestr[pos:])
                 if not frac:
-                    continue
-
+                    continue 
+ 
                 us_str = frac.group(1)[:6]  # Truncate to microseconds
-                components[comp] = int(us_str) * 10**(6 - len(us_str))
+                components[comp] = int(us_str) * 10**(6 - len(us_str)) 
                 pos += len(frac.group())
-
-        if pos < len_str:
-            raise ValueError('Unused components in ISO string')
-
-        if components[0] == 24:
-            # Standard supports 00:00 and 24:00 as representations of midnight
-            if any(component != 0 for component in components[1:4]):
-                raise ValueError('Hour may only be 24 at 24:00:00.000')
-
-        return components
-
-    def _parse_tzstr(self, tzstr, zero_as_utc=True):
+ 
+        if pos < len_str: 
+            raise ValueError('Unused components in ISO string') 
+ 
+        if components[0] == 24: 
+            # Standard supports 00:00 and 24:00 as representations of midnight 
+            if any(component != 0 for component in components[1:4]): 
+                raise ValueError('Hour may only be 24 at 24:00:00.000') 
+ 
+        return components 
+ 
+    def _parse_tzstr(self, tzstr, zero_as_utc=True): 
         if tzstr == b'Z' or tzstr == b'z':
             return tz.UTC
-
-        if len(tzstr) not in {3, 5, 6}:
-            raise ValueError('Time zone offset must be 1, 3, 5 or 6 characters')
-
-        if tzstr[0:1] == b'-':
-            mult = -1
-        elif tzstr[0:1] == b'+':
-            mult = 1
-        else:
-            raise ValueError('Time zone offset requires sign')
-
-        hours = int(tzstr[1:3])
-        if len(tzstr) == 3:
-            minutes = 0
-        else:
-            minutes = int(tzstr[(4 if tzstr[3:4] == self._TIME_SEP else 3):])
-
-        if zero_as_utc and hours == 0 and minutes == 0:
+ 
+        if len(tzstr) not in {3, 5, 6}: 
+            raise ValueError('Time zone offset must be 1, 3, 5 or 6 characters') 
+ 
+        if tzstr[0:1] == b'-': 
+            mult = -1 
+        elif tzstr[0:1] == b'+': 
+            mult = 1 
+        else: 
+            raise ValueError('Time zone offset requires sign') 
+ 
+        hours = int(tzstr[1:3]) 
+        if len(tzstr) == 3: 
+            minutes = 0 
+        else: 
+            minutes = int(tzstr[(4 if tzstr[3:4] == self._TIME_SEP else 3):]) 
+ 
+        if zero_as_utc and hours == 0 and minutes == 0: 
             return tz.UTC
-        else:
-            if minutes > 59:
-                raise ValueError('Invalid minutes in time zone offset')
-
-            if hours > 23:
-                raise ValueError('Invalid hours in time zone offset')
-
-            return tz.tzoffset(None, mult * (hours * 60 + minutes) * 60)
-
-
-DEFAULT_ISOPARSER = isoparser()
-isoparse = DEFAULT_ISOPARSER.isoparse
+        else: 
+            if minutes > 59: 
+                raise ValueError('Invalid minutes in time zone offset') 
+ 
+            if hours > 23: 
+                raise ValueError('Invalid hours in time zone offset') 
+ 
+            return tz.tzoffset(None, mult * (hours * 60 + minutes) * 60) 
+ 
+ 
+DEFAULT_ISOPARSER = isoparser() 
+isoparse = DEFAULT_ISOPARSER.isoparse 
diff --git a/contrib/python/dateutil/dateutil/relativedelta.py b/contrib/python/dateutil/dateutil/relativedelta.py
index a9e85f7e6c..35c0ae546f 100644
--- a/contrib/python/dateutil/dateutil/relativedelta.py
+++ b/contrib/python/dateutil/dateutil/relativedelta.py
@@ -23,7 +23,7 @@ class relativedelta(object):
 
     It is based on the specification of the excellent work done by M.-A. Lemburg
     in his
-    `mx.DateTime <https://www.egenix.com/products/python/mxBase/mxDateTime/>`_ extension.
+    `mx.DateTime <https://www.egenix.com/products/python/mxBase/mxDateTime/>`_ extension. 
     However, notice that this type does *NOT* implement the same algorithm as
     his work. Do *NOT* expect it to behave like mx.DateTime's counterpart.
 
@@ -38,7 +38,7 @@ class relativedelta(object):
 
         year, month, day, hour, minute, second, microsecond:
             Absolute information (argument is singular); adding or subtracting a
-            relativedelta with absolute information does not perform an arithmetic
+            relativedelta with absolute information does not perform an arithmetic 
             operation, but rather REPLACES the corresponding value in the
             original datetime with the value(s) in relativedelta.
 
@@ -48,7 +48,7 @@ class relativedelta(object):
             the corresponding arithmetic operation on the original datetime value
             with the information in the relativedelta.
 
-        weekday: 
+        weekday:  
             One of the weekday instances (MO, TU, etc) available in the
             relativedelta module. These instances may receive a parameter N,
             specifying the Nth weekday, which could be positive or negative
@@ -67,38 +67,38 @@ class relativedelta(object):
             Set the yearday or the non-leap year day (jump leap days).
             These are converted to day/month/leapdays information.
 
-    There are relative and absolute forms of the keyword
-    arguments. The plural is relative, and the singular is
-    absolute. For each argument in the order below, the absolute form
-    is applied first (by setting each attribute to that value) and
-    then the relative form (by adding the value to the attribute).
+    There are relative and absolute forms of the keyword 
+    arguments. The plural is relative, and the singular is 
+    absolute. For each argument in the order below, the absolute form 
+    is applied first (by setting each attribute to that value) and 
+    then the relative form (by adding the value to the attribute). 
 
-    The order of attributes considered when this relativedelta is
-    added to a datetime is:
+    The order of attributes considered when this relativedelta is 
+    added to a datetime is: 
 
-    1. Year
-    2. Month
-    3. Day
-    4. Hours
-    5. Minutes
-    6. Seconds
-    7. Microseconds
+    1. Year 
+    2. Month 
+    3. Day 
+    4. Hours 
+    5. Minutes 
+    6. Seconds 
+    7. Microseconds 
 
-    Finally, weekday is applied, using the rule described above.
+    Finally, weekday is applied, using the rule described above. 
 
-    For example
+    For example 
 
     >>> from datetime import datetime
     >>> from dateutil.relativedelta import relativedelta, MO
-    >>> dt = datetime(2018, 4, 9, 13, 37, 0)
-    >>> delta = relativedelta(hours=25, day=1, weekday=MO(1))
+    >>> dt = datetime(2018, 4, 9, 13, 37, 0) 
+    >>> delta = relativedelta(hours=25, day=1, weekday=MO(1)) 
     >>> dt + delta
     datetime.datetime(2018, 4, 2, 14, 37)
 
-    First, the day is set to 1 (the first of the month), then 25 hours
-    are added, to get to the 2nd day and 14th hour, finally the
-    weekday is applied, but since the 2nd is already a Monday there is
-    no effect.
+    First, the day is set to 1 (the first of the month), then 25 hours 
+    are added, to get to the 2nd day and 14th hour, finally the 
+    weekday is applied, but since the 2nd is already a Monday there is 
+    no effect. 
 
     """
 
@@ -168,14 +168,14 @@ class relativedelta(object):
             self.seconds = delta.seconds + delta.days * 86400
             self.microseconds = delta.microseconds
         else:
-            # Check for non-integer values in integer-only quantities
-            if any(x is not None and x != int(x) for x in (years, months)):
-                raise ValueError("Non-integer years and months are "
-                                 "ambiguous and not currently supported.")
-
+            # Check for non-integer values in integer-only quantities 
+            if any(x is not None and x != int(x) for x in (years, months)): 
+                raise ValueError("Non-integer years and months are " 
+                                 "ambiguous and not currently supported.") 
+ 
             # Relative information
-            self.years = int(years)
-            self.months = int(months)
+            self.years = int(years) 
+            self.months = int(months) 
             self.days = days + weeks * 7
             self.leapdays = leapdays
             self.hours = hours
@@ -263,7 +263,7 @@ class relativedelta(object):
 
     @property
     def weeks(self):
-        return int(self.days / 7.0)
+        return int(self.days / 7.0) 
 
     @weeks.setter
     def weeks(self, value):
@@ -436,24 +436,24 @@ class relativedelta(object):
                                           is not None else
                                           other.microsecond))
 
-    def __abs__(self):
-        return self.__class__(years=abs(self.years),
-                              months=abs(self.months),
-                              days=abs(self.days),
-                              hours=abs(self.hours),
-                              minutes=abs(self.minutes),
-                              seconds=abs(self.seconds),
-                              microseconds=abs(self.microseconds),
-                              leapdays=self.leapdays,
-                              year=self.year,
-                              month=self.month,
-                              day=self.day,
-                              weekday=self.weekday,
-                              hour=self.hour,
-                              minute=self.minute,
-                              second=self.second,
-                              microsecond=self.microsecond)
-
+    def __abs__(self): 
+        return self.__class__(years=abs(self.years), 
+                              months=abs(self.months), 
+                              days=abs(self.days), 
+                              hours=abs(self.hours), 
+                              minutes=abs(self.minutes), 
+                              seconds=abs(self.seconds), 
+                              microseconds=abs(self.microseconds), 
+                              leapdays=self.leapdays, 
+                              year=self.year, 
+                              month=self.month, 
+                              day=self.day, 
+                              weekday=self.weekday, 
+                              hour=self.hour, 
+                              minute=self.minute, 
+                              second=self.second, 
+                              microsecond=self.microsecond) 
+ 
     def __neg__(self):
         return self.__class__(years=-self.years,
                              months=-self.months,
@@ -544,25 +544,25 @@ class relativedelta(object):
                 self.second == other.second and
                 self.microsecond == other.microsecond)
 
-    def __hash__(self):
-        return hash((
-            self.weekday,
-            self.years,
-            self.months,
-            self.days,
-            self.hours,
-            self.minutes,
-            self.seconds,
-            self.microseconds,
-            self.leapdays,
-            self.year,
-            self.month,
-            self.day,
-            self.hour,
-            self.minute,
-            self.second,
-            self.microsecond,
-        ))
+    def __hash__(self): 
+        return hash(( 
+            self.weekday, 
+            self.years, 
+            self.months, 
+            self.days, 
+            self.hours, 
+            self.minutes, 
+            self.seconds, 
+            self.microseconds, 
+            self.leapdays, 
+            self.year, 
+            self.month, 
+            self.day, 
+            self.hour, 
+            self.minute, 
+            self.second, 
+            self.microsecond, 
+        )) 
 
     def __ne__(self, other):
         return not self.__eq__(other)
diff --git a/contrib/python/dateutil/dateutil/rrule.py b/contrib/python/dateutil/dateutil/rrule.py
index b3203393c6..ad1c8b3dae 100644
--- a/contrib/python/dateutil/dateutil/rrule.py
+++ b/contrib/python/dateutil/dateutil/rrule.py
@@ -2,14 +2,14 @@
 """
 The rrule module offers a small, complete, and very fast, implementation of
 the recurrence rules documented in the
-`iCalendar RFC <https://tools.ietf.org/html/rfc5545>`_,
+`iCalendar RFC <https://tools.ietf.org/html/rfc5545>`_, 
 including support for caching of results.
 """
 import calendar
 import datetime
 import heapq
 import itertools
-import re
+import re 
 import sys
 from functools import wraps
 # For warning about deprecation of until and count
@@ -390,11 +390,11 @@ class rrule(rrulebase):
     :param byyearday:
         If given, it must be either an integer, or a sequence of integers,
         meaning the year days to apply the recurrence to.
-    :param byeaster:
-        If given, it must be either an integer, or a sequence of integers,
-        positive or negative. Each integer will define an offset from the
-        Easter Sunday. Passing the offset 0 to byeaster will yield the Easter
-        Sunday itself. This is an extension to the RFC specification.
+    :param byeaster: 
+        If given, it must be either an integer, or a sequence of integers, 
+        positive or negative. Each integer will define an offset from the 
+        Easter Sunday. Passing the offset 0 to byeaster will yield the Easter 
+        Sunday itself. This is an extension to the RFC specification. 
     :param byweekno:
         If given, it must be either an integer, or a sequence of integers,
         meaning the week numbers to apply the recurrence to. Week numbers
@@ -420,10 +420,10 @@ class rrule(rrulebase):
     :param bysecond:
         If given, it must be either an integer, or a sequence of integers,
         meaning the seconds to apply the recurrence to.
-    :param cache:
-        If given, it must be a boolean value specifying to enable or disable
-        caching of results. If you will use the same rrule instance multiple
-        times, enabling caching will improve the performance considerably.
+    :param cache: 
+        If given, it must be a boolean value specifying to enable or disable 
+        caching of results. If you will use the same rrule instance multiple 
+        times, enabling caching will improve the performance considerably. 
      """
     def __init__(self, freq, dtstart=None,
                  interval=1, wkst=None, count=None, until=None, bysetpos=None,
@@ -434,10 +434,10 @@ class rrule(rrulebase):
         super(rrule, self).__init__(cache)
         global easter
         if not dtstart:
-            if until and until.tzinfo:
-                dtstart = datetime.datetime.now(tz=until.tzinfo).replace(microsecond=0)
+            if until and until.tzinfo: 
+                dtstart = datetime.datetime.now(tz=until.tzinfo).replace(microsecond=0) 
             else:
-                dtstart = datetime.datetime.now().replace(microsecond=0)
+                dtstart = datetime.datetime.now().replace(microsecond=0) 
         elif not isinstance(dtstart, datetime.datetime):
             dtstart = datetime.datetime.fromordinal(dtstart.toordinal())
         else:
@@ -458,22 +458,22 @@ class rrule(rrulebase):
             until = datetime.datetime.fromordinal(until.toordinal())
         self._until = until
 
-        if self._dtstart and self._until:
-            if (self._dtstart.tzinfo is not None) != (self._until.tzinfo is not None):
-                # According to RFC5545 Section 3.3.10:
-                # https://tools.ietf.org/html/rfc5545#section-3.3.10
-                #
-                # > If the "DTSTART" property is specified as a date with UTC
-                # > time or a date with local time and time zone reference,
-                # > then the UNTIL rule part MUST be specified as a date with
-                # > UTC time.
-                raise ValueError(
-                    'RRULE UNTIL values must be specified in UTC when DTSTART '
-                    'is timezone-aware'
-                )
-
+        if self._dtstart and self._until: 
+            if (self._dtstart.tzinfo is not None) != (self._until.tzinfo is not None): 
+                # According to RFC5545 Section 3.3.10: 
+                # https://tools.ietf.org/html/rfc5545#section-3.3.10 
+                # 
+                # > If the "DTSTART" property is specified as a date with UTC 
+                # > time or a date with local time and time zone reference, 
+                # > then the UNTIL rule part MUST be specified as a date with 
+                # > UTC time. 
+                raise ValueError( 
+                    'RRULE UNTIL values must be specified in UTC when DTSTART ' 
+                    'is timezone-aware' 
+                ) 
+ 
         if count is not None and until:
-            warn("Using both 'count' and 'until' is inconsistent with RFC 5545"
+            warn("Using both 'count' and 'until' is inconsistent with RFC 5545" 
                  " and has been deprecated in dateutil. Future versions will "
                  "raise an error.", DeprecationWarning)
 
@@ -610,13 +610,13 @@ class rrule(rrulebase):
                 self._byweekday = tuple(sorted(self._byweekday))
                 orig_byweekday = [weekday(x) for x in self._byweekday]
             else:
-                orig_byweekday = ()
+                orig_byweekday = () 
 
             if self._bynweekday is not None:
                 self._bynweekday = tuple(sorted(self._bynweekday))
                 orig_bynweekday = [weekday(*x) for x in self._bynweekday]
             else:
-                orig_bynweekday = ()
+                orig_bynweekday = () 
 
             if 'byweekday' not in self._original_rule:
                 self._original_rule['byweekday'] = tuple(itertools.chain(
@@ -625,7 +625,7 @@ class rrule(rrulebase):
         # byhour
         if byhour is None:
             if freq < HOURLY:
-                self._byhour = {dtstart.hour}
+                self._byhour = {dtstart.hour} 
             else:
                 self._byhour = None
         else:
@@ -645,7 +645,7 @@ class rrule(rrulebase):
         # byminute
         if byminute is None:
             if freq < MINUTELY:
-                self._byminute = {dtstart.minute}
+                self._byminute = {dtstart.minute} 
             else:
                 self._byminute = None
         else:
@@ -700,7 +700,7 @@ class rrule(rrulebase):
     def __str__(self):
         """
         Output a string that would generate this RRULE if passed to rrulestr.
-        This is mostly compatible with RFC5545, except for the
+        This is mostly compatible with RFC5545, except for the 
         dateutil-specific extension BYEASTER.
         """
 
@@ -725,7 +725,7 @@ class rrule(rrulebase):
 
         if self._original_rule.get('byweekday') is not None:
             # The str() method on weekday objects doesn't generate
-            # RFC5545-compliant strings, so we should modify that.
+            # RFC5545-compliant strings, so we should modify that. 
             original_rule = dict(self._original_rule)
             wday_strings = []
             for wday in original_rule['byweekday']:
@@ -756,7 +756,7 @@ class rrule(rrulebase):
                 parts.append(partfmt.format(name=name, vals=(','.join(str(v)
                                                              for v in value))))
 
-        output.append('RRULE:' + ';'.join(parts))
+        output.append('RRULE:' + ';'.join(parts)) 
         return '\n'.join(output)
 
     def replace(self, **kwargs):
@@ -1619,17 +1619,17 @@ class _rrulestr(object):
                    forceset=False,
                    compatible=False,
                    ignoretz=False,
-                   tzids=None,
+                   tzids=None, 
                    tzinfos=None):
         global parser
         if compatible:
             forceset = True
             unfold = True
-
-        TZID_NAMES = dict(map(
-            lambda x: (x.upper(), x),
-            re.findall('TZID=(?P<name>[^:]+):', s)
-        ))
+ 
+        TZID_NAMES = dict(map( 
+            lambda x: (x.upper(), x), 
+            re.findall('TZID=(?P<name>[^:]+):', s) 
+        )) 
         s = s.upper()
         if not s.strip():
             raise ValueError("empty string")
diff --git a/contrib/python/dateutil/dateutil/test/_common.py b/contrib/python/dateutil/dateutil/test/_common.py
index b8d2047374..3444ee9c9c 100644
--- a/contrib/python/dateutil/dateutil/test/_common.py
+++ b/contrib/python/dateutil/dateutil/test/_common.py
@@ -1,233 +1,233 @@
-from __future__ import unicode_literals
-import os
-import time
-import subprocess
-import warnings
-import tempfile
-import pickle
-
+from __future__ import unicode_literals 
+import os 
+import time 
+import subprocess 
+import warnings 
+import tempfile 
+import pickle 
+ 
 import pytest
-
-
-class PicklableMixin(object):
-    def _get_nobj_bytes(self, obj, dump_kwargs, load_kwargs):
-        """
-        Pickle and unpickle an object using ``pickle.dumps`` / ``pickle.loads``
-        """
-        pkl = pickle.dumps(obj, **dump_kwargs)
-        return pickle.loads(pkl, **load_kwargs)
-
-    def _get_nobj_file(self, obj, dump_kwargs, load_kwargs):
-        """
-        Pickle and unpickle an object using ``pickle.dump`` / ``pickle.load`` on
-        a temporary file.
-        """
-        with tempfile.TemporaryFile('w+b') as pkl:
-            pickle.dump(obj, pkl, **dump_kwargs)
-            pkl.seek(0)         # Reset the file to the beginning to read it
-            nobj = pickle.load(pkl, **load_kwargs)
-
-        return nobj
-
-    def assertPicklable(self, obj, singleton=False, asfile=False,
-                        dump_kwargs=None, load_kwargs=None):
-        """
-        Assert that an object can be pickled and unpickled. This assertion
-        assumes that the desired behavior is that the unpickled object compares
-        equal to the original object, but is not the same object.
-        """
-        get_nobj = self._get_nobj_file if asfile else self._get_nobj_bytes
-        dump_kwargs = dump_kwargs or {}
-        load_kwargs = load_kwargs or {}
-
-        nobj = get_nobj(obj, dump_kwargs, load_kwargs)
-        if not singleton:
-            self.assertIsNot(obj, nobj)
-        self.assertEqual(obj, nobj)
-
-
-class TZContextBase(object):
-    """
-    Base class for a context manager which allows changing of time zones.
-
-    Subclasses may define a guard variable to either block or or allow time
-    zone changes by redefining ``_guard_var_name`` and ``_guard_allows_change``.
-    The default is that the guard variable must be affirmatively set.
-
-    Subclasses must define ``get_current_tz`` and ``set_current_tz``.
-    """
-    _guard_var_name = "DATEUTIL_MAY_CHANGE_TZ"
-    _guard_allows_change = True
-
-    def __init__(self, tzval):
-        self.tzval = tzval
-        self._old_tz = None
-
-    @classmethod
-    def tz_change_allowed(cls):
-        """
-        Class method used to query whether or not this class allows time zone
-        changes.
-        """
+ 
+ 
+class PicklableMixin(object): 
+    def _get_nobj_bytes(self, obj, dump_kwargs, load_kwargs): 
+        """ 
+        Pickle and unpickle an object using ``pickle.dumps`` / ``pickle.loads`` 
+        """ 
+        pkl = pickle.dumps(obj, **dump_kwargs) 
+        return pickle.loads(pkl, **load_kwargs) 
+ 
+    def _get_nobj_file(self, obj, dump_kwargs, load_kwargs): 
+        """ 
+        Pickle and unpickle an object using ``pickle.dump`` / ``pickle.load`` on 
+        a temporary file. 
+        """ 
+        with tempfile.TemporaryFile('w+b') as pkl: 
+            pickle.dump(obj, pkl, **dump_kwargs) 
+            pkl.seek(0)         # Reset the file to the beginning to read it 
+            nobj = pickle.load(pkl, **load_kwargs) 
+ 
+        return nobj 
+ 
+    def assertPicklable(self, obj, singleton=False, asfile=False, 
+                        dump_kwargs=None, load_kwargs=None): 
+        """ 
+        Assert that an object can be pickled and unpickled. This assertion 
+        assumes that the desired behavior is that the unpickled object compares 
+        equal to the original object, but is not the same object. 
+        """ 
+        get_nobj = self._get_nobj_file if asfile else self._get_nobj_bytes 
+        dump_kwargs = dump_kwargs or {} 
+        load_kwargs = load_kwargs or {} 
+ 
+        nobj = get_nobj(obj, dump_kwargs, load_kwargs) 
+        if not singleton: 
+            self.assertIsNot(obj, nobj) 
+        self.assertEqual(obj, nobj) 
+ 
+ 
+class TZContextBase(object): 
+    """ 
+    Base class for a context manager which allows changing of time zones. 
+ 
+    Subclasses may define a guard variable to either block or or allow time 
+    zone changes by redefining ``_guard_var_name`` and ``_guard_allows_change``. 
+    The default is that the guard variable must be affirmatively set. 
+ 
+    Subclasses must define ``get_current_tz`` and ``set_current_tz``. 
+    """ 
+    _guard_var_name = "DATEUTIL_MAY_CHANGE_TZ" 
+    _guard_allows_change = True 
+ 
+    def __init__(self, tzval): 
+        self.tzval = tzval 
+        self._old_tz = None 
+ 
+    @classmethod 
+    def tz_change_allowed(cls): 
+        """ 
+        Class method used to query whether or not this class allows time zone 
+        changes. 
+        """ 
         guard = bool(os.environ.get(cls._guard_var_name, False))
-
-        # _guard_allows_change gives the "default" behavior - if True, the
-        # guard is overcoming a block. If false, the guard is causing a block.
-        # Whether tz_change is allowed is therefore the XNOR of the two.
+ 
+        # _guard_allows_change gives the "default" behavior - if True, the 
+        # guard is overcoming a block. If false, the guard is causing a block. 
+        # Whether tz_change is allowed is therefore the XNOR of the two. 
         return guard == cls._guard_allows_change
-
-    @classmethod
-    def tz_change_disallowed_message(cls):
-        """ Generate instructions on how to allow tz changes """
-        msg = ('Changing time zone not allowed. Set {envar} to {gval} '
-               'if you would like to allow this behavior')
-
-        return msg.format(envar=cls._guard_var_name,
-                          gval=cls._guard_allows_change)
-
-    def __enter__(self):
-        if not self.tz_change_allowed():
+ 
+    @classmethod 
+    def tz_change_disallowed_message(cls): 
+        """ Generate instructions on how to allow tz changes """ 
+        msg = ('Changing time zone not allowed. Set {envar} to {gval} ' 
+               'if you would like to allow this behavior') 
+ 
+        return msg.format(envar=cls._guard_var_name, 
+                          gval=cls._guard_allows_change) 
+ 
+    def __enter__(self): 
+        if not self.tz_change_allowed(): 
             msg = self.tz_change_disallowed_message()
             pytest.skip(msg)
-
+ 
             # If this is used outside of a test suite, we still want an error.
             raise ValueError(msg)  # pragma: no cover
 
-        self._old_tz = self.get_current_tz()
-        self.set_current_tz(self.tzval)
-
-    def __exit__(self, type, value, traceback):
-        if self._old_tz is not None:
-            self.set_current_tz(self._old_tz)
-
-        self._old_tz = None
-
-    def get_current_tz(self):
-        raise NotImplementedError
-
-    def set_current_tz(self):
-        raise NotImplementedError
-
-
-class TZEnvContext(TZContextBase):
-    """
-    Context manager that temporarily sets the `TZ` variable (for use on
-    *nix-like systems). Because the effect is local to the shell anyway, this
-    will apply *unless* a guard is set.
-
-    If you do not want the TZ environment variable set, you may set the
-    ``DATEUTIL_MAY_NOT_CHANGE_TZ_VAR`` variable to a truthy value.
-    """
-    _guard_var_name = "DATEUTIL_MAY_NOT_CHANGE_TZ_VAR"
-    _guard_allows_change = False
-
-    def get_current_tz(self):
-        return os.environ.get('TZ', UnsetTz)
-
-    def set_current_tz(self, tzval):
-        if tzval is UnsetTz and 'TZ' in os.environ:
-            del os.environ['TZ']
-        else:
-            os.environ['TZ'] = tzval
-
-        time.tzset()
-
-
-class TZWinContext(TZContextBase):
-    """
-    Context manager for changing local time zone on Windows.
-
-    Because the effect of this is system-wide and global, it may have
-    unintended side effect. Set the ``DATEUTIL_MAY_CHANGE_TZ`` environment
-    variable to a truthy value before using this context manager.
-    """
-    def get_current_tz(self):
-        p = subprocess.Popen(['tzutil', '/g'], stdout=subprocess.PIPE)
-
-        ctzname, err = p.communicate()
-        ctzname = ctzname.decode()     # Popen returns
-
-        if p.returncode:
-            raise OSError('Failed to get current time zone: ' + err)
-
-        return ctzname
-
-    def set_current_tz(self, tzname):
-        p = subprocess.Popen('tzutil /s "' + tzname + '"')
-
-        out, err = p.communicate()
-
-        if p.returncode:
-            raise OSError('Failed to set current time zone: ' +
-                          (err or 'Unknown error.'))
-
-
-###
-# Utility classes
-class NotAValueClass(object):
-    """
-    A class analogous to NaN that has operations defined for any type.
-    """
-    def _op(self, other):
-        return self             # Operation with NotAValue returns NotAValue
-
-    def _cmp(self, other):
-        return False
-
-    __add__ = __radd__ = _op
-    __sub__ = __rsub__ = _op
-    __mul__ = __rmul__ = _op
-    __div__ = __rdiv__ = _op
-    __truediv__ = __rtruediv__ = _op
-    __floordiv__ = __rfloordiv__ = _op
-
-    __lt__ = __rlt__ = _op
-    __gt__ = __rgt__ = _op
-    __eq__ = __req__ = _op
-    __le__ = __rle__ = _op
-    __ge__ = __rge__ = _op
-
-
-NotAValue = NotAValueClass()
-
-
-class ComparesEqualClass(object):
-    """
-    A class that is always equal to whatever you compare it to.
-    """
-
-    def __eq__(self, other):
-        return True
-
-    def __ne__(self, other):
-        return False
-
-    def __le__(self, other):
-        return True
-
-    def __ge__(self, other):
-        return True
-
-    def __lt__(self, other):
-        return False
-
-    def __gt__(self, other):
-        return False
-
-    __req__ = __eq__
-    __rne__ = __ne__
-    __rle__ = __le__
-    __rge__ = __ge__
-    __rlt__ = __lt__
-    __rgt__ = __gt__
-
-
-ComparesEqual = ComparesEqualClass()
-
-
-class UnsetTzClass(object):
-    """ Sentinel class for unset time zone variable """
-    pass
-
-
-UnsetTz = UnsetTzClass()
+        self._old_tz = self.get_current_tz() 
+        self.set_current_tz(self.tzval) 
+ 
+    def __exit__(self, type, value, traceback): 
+        if self._old_tz is not None: 
+            self.set_current_tz(self._old_tz) 
+ 
+        self._old_tz = None 
+ 
+    def get_current_tz(self): 
+        raise NotImplementedError 
+ 
+    def set_current_tz(self): 
+        raise NotImplementedError 
+ 
+ 
+class TZEnvContext(TZContextBase): 
+    """ 
+    Context manager that temporarily sets the `TZ` variable (for use on 
+    *nix-like systems). Because the effect is local to the shell anyway, this 
+    will apply *unless* a guard is set. 
+ 
+    If you do not want the TZ environment variable set, you may set the 
+    ``DATEUTIL_MAY_NOT_CHANGE_TZ_VAR`` variable to a truthy value. 
+    """ 
+    _guard_var_name = "DATEUTIL_MAY_NOT_CHANGE_TZ_VAR" 
+    _guard_allows_change = False 
+ 
+    def get_current_tz(self): 
+        return os.environ.get('TZ', UnsetTz) 
+ 
+    def set_current_tz(self, tzval): 
+        if tzval is UnsetTz and 'TZ' in os.environ: 
+            del os.environ['TZ'] 
+        else: 
+            os.environ['TZ'] = tzval 
+ 
+        time.tzset() 
+ 
+ 
+class TZWinContext(TZContextBase): 
+    """ 
+    Context manager for changing local time zone on Windows. 
+ 
+    Because the effect of this is system-wide and global, it may have 
+    unintended side effect. Set the ``DATEUTIL_MAY_CHANGE_TZ`` environment 
+    variable to a truthy value before using this context manager. 
+    """ 
+    def get_current_tz(self): 
+        p = subprocess.Popen(['tzutil', '/g'], stdout=subprocess.PIPE) 
+ 
+        ctzname, err = p.communicate() 
+        ctzname = ctzname.decode()     # Popen returns 
+ 
+        if p.returncode: 
+            raise OSError('Failed to get current time zone: ' + err) 
+ 
+        return ctzname 
+ 
+    def set_current_tz(self, tzname): 
+        p = subprocess.Popen('tzutil /s "' + tzname + '"') 
+ 
+        out, err = p.communicate() 
+ 
+        if p.returncode: 
+            raise OSError('Failed to set current time zone: ' + 
+                          (err or 'Unknown error.')) 
+ 
+ 
+### 
+# Utility classes 
+class NotAValueClass(object): 
+    """ 
+    A class analogous to NaN that has operations defined for any type. 
+    """ 
+    def _op(self, other): 
+        return self             # Operation with NotAValue returns NotAValue 
+ 
+    def _cmp(self, other): 
+        return False 
+ 
+    __add__ = __radd__ = _op 
+    __sub__ = __rsub__ = _op 
+    __mul__ = __rmul__ = _op 
+    __div__ = __rdiv__ = _op 
+    __truediv__ = __rtruediv__ = _op 
+    __floordiv__ = __rfloordiv__ = _op 
+ 
+    __lt__ = __rlt__ = _op 
+    __gt__ = __rgt__ = _op 
+    __eq__ = __req__ = _op 
+    __le__ = __rle__ = _op 
+    __ge__ = __rge__ = _op 
+ 
+ 
+NotAValue = NotAValueClass() 
+ 
+ 
+class ComparesEqualClass(object): 
+    """ 
+    A class that is always equal to whatever you compare it to. 
+    """ 
+ 
+    def __eq__(self, other): 
+        return True 
+ 
+    def __ne__(self, other): 
+        return False 
+ 
+    def __le__(self, other): 
+        return True 
+ 
+    def __ge__(self, other): 
+        return True 
+ 
+    def __lt__(self, other): 
+        return False 
+ 
+    def __gt__(self, other): 
+        return False 
+ 
+    __req__ = __eq__ 
+    __rne__ = __ne__ 
+    __rle__ = __le__ 
+    __rge__ = __ge__ 
+    __rlt__ = __lt__ 
+    __rgt__ = __gt__ 
+ 
+ 
+ComparesEqual = ComparesEqualClass() 
+ 
+ 
+class UnsetTzClass(object): 
+    """ Sentinel class for unset time zone variable """ 
+    pass 
+ 
+ 
+UnsetTz = UnsetTzClass() 
diff --git a/contrib/python/dateutil/dateutil/test/property/test_isoparse_prop.py b/contrib/python/dateutil/dateutil/test/property/test_isoparse_prop.py
index f8e288f3d6..9094886329 100644
--- a/contrib/python/dateutil/dateutil/test/property/test_isoparse_prop.py
+++ b/contrib/python/dateutil/dateutil/test/property/test_isoparse_prop.py
@@ -1,27 +1,27 @@
-from hypothesis import given, assume
-from hypothesis import strategies as st
-
-from dateutil import tz
-from dateutil.parser import isoparse
-
-import pytest
-
-# Strategies
+from hypothesis import given, assume 
+from hypothesis import strategies as st 
+ 
+from dateutil import tz 
+from dateutil.parser import isoparse 
+ 
+import pytest 
+ 
+# Strategies 
 TIME_ZONE_STRATEGY = st.sampled_from([None, tz.UTC] +
-    [tz.gettz(zname) for zname in ('US/Eastern', 'US/Pacific',
-                                   'Australia/Sydney', 'Europe/London')])
-ASCII_STRATEGY = st.characters(max_codepoint=127)
-
-
-@pytest.mark.isoparser
-@given(dt=st.datetimes(timezones=TIME_ZONE_STRATEGY), sep=ASCII_STRATEGY)
-def test_timespec_auto(dt, sep):
-    if dt.tzinfo is not None:
-        # Assume offset has no sub-second components
-        assume(dt.utcoffset().total_seconds() % 60 == 0)
-
-    sep = str(sep)          # Python 2.7 requires bytes
-    dtstr = dt.isoformat(sep=sep)
-    dt_rt = isoparse(dtstr)
-
-    assert dt_rt == dt
+    [tz.gettz(zname) for zname in ('US/Eastern', 'US/Pacific', 
+                                   'Australia/Sydney', 'Europe/London')]) 
+ASCII_STRATEGY = st.characters(max_codepoint=127) 
+ 
+ 
+@pytest.mark.isoparser 
+@given(dt=st.datetimes(timezones=TIME_ZONE_STRATEGY), sep=ASCII_STRATEGY) 
+def test_timespec_auto(dt, sep): 
+    if dt.tzinfo is not None: 
+        # Assume offset has no sub-second components 
+        assume(dt.utcoffset().total_seconds() % 60 == 0) 
+ 
+    sep = str(sep)          # Python 2.7 requires bytes 
+    dtstr = dt.isoformat(sep=sep) 
+    dt_rt = isoparse(dtstr) 
+ 
+    assert dt_rt == dt 
diff --git a/contrib/python/dateutil/dateutil/test/property/test_parser_prop.py b/contrib/python/dateutil/dateutil/test/property/test_parser_prop.py
index fdfd171e86..f8f5769409 100644
--- a/contrib/python/dateutil/dateutil/test/property/test_parser_prop.py
+++ b/contrib/python/dateutil/dateutil/test/property/test_parser_prop.py
@@ -1,22 +1,22 @@
-from hypothesis.strategies import integers
-from hypothesis import given
-
-import pytest
-
-from dateutil.parser import parserinfo
-
-
-@pytest.mark.parserinfo
-@given(integers(min_value=100, max_value=9999))
-def test_convertyear(n):
-    assert n == parserinfo().convertyear(n)
-
-
-@pytest.mark.parserinfo
-@given(integers(min_value=-50,
-                max_value=49))
-def test_convertyear_no_specified_century(n):
-    p = parserinfo()
-    new_year = p._year + n
-    result = p.convertyear(new_year % 100, century_specified=False)
-    assert result == new_year
+from hypothesis.strategies import integers 
+from hypothesis import given 
+ 
+import pytest 
+ 
+from dateutil.parser import parserinfo 
+ 
+ 
+@pytest.mark.parserinfo 
+@given(integers(min_value=100, max_value=9999)) 
+def test_convertyear(n): 
+    assert n == parserinfo().convertyear(n) 
+ 
+ 
+@pytest.mark.parserinfo 
+@given(integers(min_value=-50, 
+                max_value=49)) 
+def test_convertyear_no_specified_century(n): 
+    p = parserinfo() 
+    new_year = p._year + n 
+    result = p.convertyear(new_year % 100, century_specified=False) 
+    assert result == new_year 
diff --git a/contrib/python/dateutil/dateutil/test/test_easter.py b/contrib/python/dateutil/dateutil/test/test_easter.py
index cf2ec7f287..646ff98d0a 100644
--- a/contrib/python/dateutil/dateutil/test/test_easter.py
+++ b/contrib/python/dateutil/dateutil/test/test_easter.py
@@ -1,87 +1,87 @@
-from dateutil.easter import easter
-from dateutil.easter import EASTER_WESTERN, EASTER_ORTHODOX, EASTER_JULIAN
-
-from datetime import date
+from dateutil.easter import easter 
+from dateutil.easter import EASTER_WESTERN, EASTER_ORTHODOX, EASTER_JULIAN 
+ 
+from datetime import date 
 import pytest
-
-# List of easters between 1990 and 2050
-western_easter_dates = [
-    date(1990, 4, 15), date(1991, 3, 31), date(1992, 4, 19), date(1993, 4, 11),
-    date(1994, 4,  3), date(1995, 4, 16), date(1996, 4,  7), date(1997, 3, 30),
-    date(1998, 4, 12), date(1999, 4,  4),
-
-    date(2000, 4, 23), date(2001, 4, 15), date(2002, 3, 31), date(2003, 4, 20),
-    date(2004, 4, 11), date(2005, 3, 27), date(2006, 4, 16), date(2007, 4,  8),
-    date(2008, 3, 23), date(2009, 4, 12),
-
-    date(2010, 4,  4), date(2011, 4, 24), date(2012, 4,  8), date(2013, 3, 31),
-    date(2014, 4, 20), date(2015, 4,  5), date(2016, 3, 27), date(2017, 4, 16),
-    date(2018, 4,  1), date(2019, 4, 21),
-
-    date(2020, 4, 12), date(2021, 4,  4), date(2022, 4, 17), date(2023, 4,  9),
-    date(2024, 3, 31), date(2025, 4, 20), date(2026, 4,  5), date(2027, 3, 28),
-    date(2028, 4, 16), date(2029, 4,  1),
-
-    date(2030, 4, 21), date(2031, 4, 13), date(2032, 3, 28), date(2033, 4, 17),
-    date(2034, 4,  9), date(2035, 3, 25), date(2036, 4, 13), date(2037, 4,  5),
-    date(2038, 4, 25), date(2039, 4, 10),
-
-    date(2040, 4,  1), date(2041, 4, 21), date(2042, 4,  6), date(2043, 3, 29),
-    date(2044, 4, 17), date(2045, 4,  9), date(2046, 3, 25), date(2047, 4, 14),
-    date(2048, 4,  5), date(2049, 4, 18), date(2050, 4, 10)
-    ]
-
-orthodox_easter_dates = [
-    date(1990, 4, 15), date(1991, 4,  7), date(1992, 4, 26), date(1993, 4, 18),
-    date(1994, 5,  1), date(1995, 4, 23), date(1996, 4, 14), date(1997, 4, 27),
-    date(1998, 4, 19), date(1999, 4, 11),
-
-    date(2000, 4, 30), date(2001, 4, 15), date(2002, 5,  5), date(2003, 4, 27),
-    date(2004, 4, 11), date(2005, 5,  1), date(2006, 4, 23), date(2007, 4,  8),
-    date(2008, 4, 27), date(2009, 4, 19),
-
-    date(2010, 4,  4), date(2011, 4, 24), date(2012, 4, 15), date(2013, 5,  5),
-    date(2014, 4, 20), date(2015, 4, 12), date(2016, 5,  1), date(2017, 4, 16),
-    date(2018, 4,  8), date(2019, 4, 28),
-
-    date(2020, 4, 19), date(2021, 5,  2), date(2022, 4, 24), date(2023, 4, 16),
-    date(2024, 5,  5), date(2025, 4, 20), date(2026, 4, 12), date(2027, 5,  2),
-    date(2028, 4, 16), date(2029, 4,  8),
-
-    date(2030, 4, 28), date(2031, 4, 13), date(2032, 5,  2), date(2033, 4, 24),
-    date(2034, 4,  9), date(2035, 4, 29), date(2036, 4, 20), date(2037, 4,  5),
-    date(2038, 4, 25), date(2039, 4, 17),
-
-    date(2040, 5,  6), date(2041, 4, 21), date(2042, 4, 13), date(2043, 5,  3),
-    date(2044, 4, 24), date(2045, 4,  9), date(2046, 4, 29), date(2047, 4, 21),
-    date(2048, 4,  5), date(2049, 4, 25), date(2050, 4, 17)
-]
-
-# A random smattering of Julian dates.
-# Pulled values from http://www.kevinlaughery.com/east4099.html
-julian_easter_dates = [
-    date( 326, 4,  3), date( 375, 4,  5), date( 492, 4,  5), date( 552, 3, 31),
-    date( 562, 4,  9), date( 569, 4, 21), date( 597, 4, 14), date( 621, 4, 19),
-    date( 636, 3, 31), date( 655, 3, 29), date( 700, 4, 11), date( 725, 4,  8),
-    date( 750, 3, 29), date( 782, 4,  7), date( 835, 4, 18), date( 849, 4, 14),
-    date( 867, 3, 30), date( 890, 4, 12), date( 922, 4, 21), date( 934, 4,  6),
-    date(1049, 3, 26), date(1058, 4, 19), date(1113, 4,  6), date(1119, 3, 30),
-    date(1242, 4, 20), date(1255, 3, 28), date(1257, 4,  8), date(1258, 3, 24),
-    date(1261, 4, 24), date(1278, 4, 17), date(1333, 4,  4), date(1351, 4, 17),
-    date(1371, 4,  6), date(1391, 3, 26), date(1402, 3, 26), date(1412, 4,  3),
-    date(1439, 4,  5), date(1445, 3, 28), date(1531, 4,  9), date(1555, 4, 14)
-]
-
-
+ 
+# List of easters between 1990 and 2050 
+western_easter_dates = [ 
+    date(1990, 4, 15), date(1991, 3, 31), date(1992, 4, 19), date(1993, 4, 11), 
+    date(1994, 4,  3), date(1995, 4, 16), date(1996, 4,  7), date(1997, 3, 30), 
+    date(1998, 4, 12), date(1999, 4,  4), 
+ 
+    date(2000, 4, 23), date(2001, 4, 15), date(2002, 3, 31), date(2003, 4, 20), 
+    date(2004, 4, 11), date(2005, 3, 27), date(2006, 4, 16), date(2007, 4,  8), 
+    date(2008, 3, 23), date(2009, 4, 12), 
+ 
+    date(2010, 4,  4), date(2011, 4, 24), date(2012, 4,  8), date(2013, 3, 31), 
+    date(2014, 4, 20), date(2015, 4,  5), date(2016, 3, 27), date(2017, 4, 16), 
+    date(2018, 4,  1), date(2019, 4, 21), 
+ 
+    date(2020, 4, 12), date(2021, 4,  4), date(2022, 4, 17), date(2023, 4,  9), 
+    date(2024, 3, 31), date(2025, 4, 20), date(2026, 4,  5), date(2027, 3, 28), 
+    date(2028, 4, 16), date(2029, 4,  1), 
+ 
+    date(2030, 4, 21), date(2031, 4, 13), date(2032, 3, 28), date(2033, 4, 17), 
+    date(2034, 4,  9), date(2035, 3, 25), date(2036, 4, 13), date(2037, 4,  5), 
+    date(2038, 4, 25), date(2039, 4, 10), 
+ 
+    date(2040, 4,  1), date(2041, 4, 21), date(2042, 4,  6), date(2043, 3, 29), 
+    date(2044, 4, 17), date(2045, 4,  9), date(2046, 3, 25), date(2047, 4, 14), 
+    date(2048, 4,  5), date(2049, 4, 18), date(2050, 4, 10) 
+    ] 
+ 
+orthodox_easter_dates = [ 
+    date(1990, 4, 15), date(1991, 4,  7), date(1992, 4, 26), date(1993, 4, 18), 
+    date(1994, 5,  1), date(1995, 4, 23), date(1996, 4, 14), date(1997, 4, 27), 
+    date(1998, 4, 19), date(1999, 4, 11), 
+ 
+    date(2000, 4, 30), date(2001, 4, 15), date(2002, 5,  5), date(2003, 4, 27), 
+    date(2004, 4, 11), date(2005, 5,  1), date(2006, 4, 23), date(2007, 4,  8), 
+    date(2008, 4, 27), date(2009, 4, 19), 
+ 
+    date(2010, 4,  4), date(2011, 4, 24), date(2012, 4, 15), date(2013, 5,  5), 
+    date(2014, 4, 20), date(2015, 4, 12), date(2016, 5,  1), date(2017, 4, 16), 
+    date(2018, 4,  8), date(2019, 4, 28), 
+ 
+    date(2020, 4, 19), date(2021, 5,  2), date(2022, 4, 24), date(2023, 4, 16), 
+    date(2024, 5,  5), date(2025, 4, 20), date(2026, 4, 12), date(2027, 5,  2), 
+    date(2028, 4, 16), date(2029, 4,  8), 
+ 
+    date(2030, 4, 28), date(2031, 4, 13), date(2032, 5,  2), date(2033, 4, 24), 
+    date(2034, 4,  9), date(2035, 4, 29), date(2036, 4, 20), date(2037, 4,  5), 
+    date(2038, 4, 25), date(2039, 4, 17), 
+ 
+    date(2040, 5,  6), date(2041, 4, 21), date(2042, 4, 13), date(2043, 5,  3), 
+    date(2044, 4, 24), date(2045, 4,  9), date(2046, 4, 29), date(2047, 4, 21), 
+    date(2048, 4,  5), date(2049, 4, 25), date(2050, 4, 17) 
+] 
+ 
+# A random smattering of Julian dates. 
+# Pulled values from http://www.kevinlaughery.com/east4099.html 
+julian_easter_dates = [ 
+    date( 326, 4,  3), date( 375, 4,  5), date( 492, 4,  5), date( 552, 3, 31), 
+    date( 562, 4,  9), date( 569, 4, 21), date( 597, 4, 14), date( 621, 4, 19), 
+    date( 636, 3, 31), date( 655, 3, 29), date( 700, 4, 11), date( 725, 4,  8), 
+    date( 750, 3, 29), date( 782, 4,  7), date( 835, 4, 18), date( 849, 4, 14), 
+    date( 867, 3, 30), date( 890, 4, 12), date( 922, 4, 21), date( 934, 4,  6), 
+    date(1049, 3, 26), date(1058, 4, 19), date(1113, 4,  6), date(1119, 3, 30), 
+    date(1242, 4, 20), date(1255, 3, 28), date(1257, 4,  8), date(1258, 3, 24), 
+    date(1261, 4, 24), date(1278, 4, 17), date(1333, 4,  4), date(1351, 4, 17), 
+    date(1371, 4,  6), date(1391, 3, 26), date(1402, 3, 26), date(1412, 4,  3), 
+    date(1439, 4,  5), date(1445, 3, 28), date(1531, 4,  9), date(1555, 4, 14) 
+] 
+ 
+ 
 @pytest.mark.parametrize("easter_date", western_easter_dates)
 def test_easter_western(easter_date):
     assert easter_date == easter(easter_date.year, EASTER_WESTERN)
-
-
+ 
+ 
 @pytest.mark.parametrize("easter_date", orthodox_easter_dates)
 def test_easter_orthodox(easter_date):
     assert easter_date == easter(easter_date.year, EASTER_ORTHODOX)
-
+ 
 
 @pytest.mark.parametrize("easter_date", julian_easter_dates)
 def test_easter_julian(easter_date):
diff --git a/contrib/python/dateutil/dateutil/test/test_import_star.py b/contrib/python/dateutil/dateutil/test/test_import_star.py
index 2fb7098128..90ce0880c6 100644
--- a/contrib/python/dateutil/dateutil/test/test_import_star.py
+++ b/contrib/python/dateutil/dateutil/test/test_import_star.py
@@ -1,16 +1,16 @@
-"""Test for the "import *" functionality.
-
+"""Test for the "import *" functionality. 
+ 
 As import * can be only done at module level, it has been added in a separate file
-"""
+""" 
 import pytest
-
-prev_locals = list(locals())
-from dateutil import *
-new_locals = {name:value for name,value in locals().items()
-              if name not in prev_locals}
-new_locals.pop('prev_locals')
-
-
+ 
+prev_locals = list(locals()) 
+from dateutil import * 
+new_locals = {name:value for name,value in locals().items() 
+              if name not in prev_locals} 
+new_locals.pop('prev_locals') 
+ 
+ 
 @pytest.mark.import_star
 def test_imported_modules():
     """ Test that `from dateutil import *` adds modules in __all__ locally """
@@ -21,7 +21,7 @@ def test_imported_modules():
     import dateutil.tz
     import dateutil.utils
     import dateutil.zoneinfo
-
+ 
     assert dateutil.easter == new_locals.pop("easter")
     assert dateutil.parser == new_locals.pop("parser")
     assert dateutil.relativedelta == new_locals.pop("relativedelta")
@@ -29,5 +29,5 @@ def test_imported_modules():
     assert dateutil.tz == new_locals.pop("tz")
     assert dateutil.utils == new_locals.pop("utils")
     assert dateutil.zoneinfo == new_locals.pop("zoneinfo")
-
+ 
     assert not new_locals
diff --git a/contrib/python/dateutil/dateutil/test/test_imports.py b/contrib/python/dateutil/dateutil/test/test_imports.py
index 60b86005ca..38aad8da46 100644
--- a/contrib/python/dateutil/dateutil/test/test_imports.py
+++ b/contrib/python/dateutil/dateutil/test/test_imports.py
@@ -1,83 +1,83 @@
-import sys
+import sys 
 import pytest
-
+ 
 
 HOST_IS_WINDOWS = sys.platform.startswith('win')
 
 
 def test_import_version_str():
-    """ Test that dateutil.__version__ can be imported"""
+    """ Test that dateutil.__version__ can be imported""" 
     from dateutil import __version__
-
-
+ 
+ 
 def test_import_version_root():
     import dateutil
     assert hasattr(dateutil, '__version__')
-
-
+ 
+ 
 # Test that dateutil.easter-related imports work properly
 def test_import_easter_direct():
     import dateutil.easter
-
-
+ 
+ 
 def test_import_easter_from():
     from dateutil import easter
-
-
+ 
+ 
 def test_import_easter_start():
     from dateutil.easter import easter
-
-
+ 
+ 
 #  Test that dateutil.parser-related imports work properly
 def test_import_parser_direct():
     import dateutil.parser
-
-
+ 
+ 
 def test_import_parser_from():
     from dateutil import parser
-
-
+ 
+ 
 def test_import_parser_all():
     # All interface
     from dateutil.parser import parse
     from dateutil.parser import parserinfo
-
+ 
     # Other public classes
     from dateutil.parser import parser
-
+ 
     for var in (parse, parserinfo, parser):
         assert var is not None
-
-
+ 
+ 
 # Test that dateutil.relativedelta-related imports work properly
 def test_import_relative_delta_direct():
     import dateutil.relativedelta
-
-
+ 
+ 
 def test_import_relative_delta_from():
     from dateutil import relativedelta
-
+ 
 def test_import_relative_delta_all():
     from dateutil.relativedelta import relativedelta
     from dateutil.relativedelta import MO, TU, WE, TH, FR, SA, SU
-
+ 
     for var in (relativedelta, MO, TU, WE, TH, FR, SA, SU):
         assert var is not None
-
+ 
     # In the public interface but not in all
     from dateutil.relativedelta import weekday
     assert weekday is not  None
-
-
+ 
+ 
 # Test that dateutil.rrule related imports work properly
 def test_import_rrule_direct():
     import dateutil.rrule
-
-
+ 
+ 
 def test_import_rrule_from():
     from dateutil import rrule
-
-
+ 
+ 
 def test_import_rrule_all():
     from dateutil.rrule import rrule
     from dateutil.rrule import rruleset
@@ -85,29 +85,29 @@ def test_import_rrule_all():
     from dateutil.rrule import YEARLY, MONTHLY, WEEKLY, DAILY
     from dateutil.rrule import HOURLY, MINUTELY, SECONDLY
     from dateutil.rrule import MO, TU, WE, TH, FR, SA, SU
-
+ 
     rr_all = (rrule, rruleset, rrulestr,
               YEARLY, MONTHLY, WEEKLY, DAILY,
               HOURLY, MINUTELY, SECONDLY,
               MO, TU, WE, TH, FR, SA, SU)
-
+ 
     for var in rr_all:
        assert var is not None
-
+ 
     # In the public interface but not in all
     from dateutil.rrule import weekday
     assert weekday is not None
-
-
+ 
+ 
 # Test that dateutil.tz related imports work properly
 def test_import_tztest_direct():
     import dateutil.tz
-
-
+ 
+ 
 def test_import_tz_from():
     from dateutil import tz
-
-
+ 
+ 
 def test_import_tz_all():
     from dateutil.tz import tzutc
     from dateutil.tz import tzoffset
@@ -123,27 +123,27 @@ def test_import_tz_all():
     from dateutil.tz import datetime_ambiguous
     from dateutil.tz import datetime_exists
     from dateutil.tz import resolve_imaginary
-
+ 
     tz_all = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
               "tzstr", "tzical", "gettz", "datetime_ambiguous",
               "datetime_exists", "resolve_imaginary", "UTC"]
-
+ 
     tz_all += ["tzwin", "tzwinlocal"] if sys.platform.startswith("win") else []
     lvars = locals()
-
+ 
     for var in tz_all:
         assert lvars[var] is not None
-
+ 
 # Test that dateutil.tzwin related imports work properly
 @pytest.mark.skipif(not HOST_IS_WINDOWS, reason="Requires Windows")
 def test_import_tz_windows_direct():
     import dateutil.tzwin
-
-
+ 
+ 
 @pytest.mark.skipif(not HOST_IS_WINDOWS, reason="Requires Windows")
 def test_import_tz_windows_from():
     from dateutil import tzwin
-
+ 
 
 @pytest.mark.skipif(not HOST_IS_WINDOWS, reason="Requires Windows")
 def test_import_tz_windows_star():
diff --git a/contrib/python/dateutil/dateutil/test/test_internals.py b/contrib/python/dateutil/dateutil/test/test_internals.py
index 530813147d..c96776f14d 100644
--- a/contrib/python/dateutil/dateutil/test/test_internals.py
+++ b/contrib/python/dateutil/dateutil/test/test_internals.py
@@ -1,91 +1,91 @@
-# -*- coding: utf-8 -*-
-"""
-Tests for implementation details, not necessarily part of the user-facing
-API.
-
-The motivating case for these tests is #483, where we want to smoke-test
-code that may be difficult to reach through the standard API calls.
-"""
-
-import sys
-import pytest
-
-from dateutil.parser._parser import _ymd
-from dateutil import tz
-
-IS_PY32 = sys.version_info[0:2] == (3, 2)
-
-
+# -*- coding: utf-8 -*- 
+""" 
+Tests for implementation details, not necessarily part of the user-facing 
+API. 
+ 
+The motivating case for these tests is #483, where we want to smoke-test 
+code that may be difficult to reach through the standard API calls. 
+""" 
+ 
+import sys 
+import pytest 
+ 
+from dateutil.parser._parser import _ymd 
+from dateutil import tz 
+ 
+IS_PY32 = sys.version_info[0:2] == (3, 2) 
+ 
+ 
 @pytest.mark.smoke
 def test_YMD_could_be_day():
     ymd = _ymd('foo bar 124 baz')
-
+ 
     ymd.append(2, 'M')
     assert ymd.has_month
     assert not ymd.has_year
     assert ymd.could_be_day(4)
     assert not ymd.could_be_day(-6)
     assert not ymd.could_be_day(32)
-
+ 
     # Assumes leap year
     assert ymd.could_be_day(29)
-
+ 
     ymd.append(1999)
     assert ymd.has_year
     assert not ymd.could_be_day(29)
-
+ 
     ymd.append(16, 'D')
     assert ymd.has_day
     assert not ymd.could_be_day(1)
-
+ 
     ymd = _ymd('foo bar 124 baz')
     ymd.append(1999)
     assert ymd.could_be_day(31)
-
-
-###
-# Test that private interfaces in _parser are deprecated properly
-@pytest.mark.skipif(IS_PY32, reason='pytest.warns not supported on Python 3.2')
-def test_parser_private_warns():
-    from dateutil.parser import _timelex, _tzparser
-    from dateutil.parser import _parsetz
-
-    with pytest.warns(DeprecationWarning):
-        _tzparser()
-
-    with pytest.warns(DeprecationWarning):
-        _timelex('2014-03-03')
-
-    with pytest.warns(DeprecationWarning):
-        _parsetz('+05:00')
-
-
-@pytest.mark.skipif(IS_PY32, reason='pytest.warns not supported on Python 3.2')
-def test_parser_parser_private_not_warns():
-    from dateutil.parser._parser import _timelex, _tzparser
-    from dateutil.parser._parser import _parsetz
-
-    with pytest.warns(None) as recorder:
-        _tzparser()
-        assert len(recorder) == 0
-
-    with pytest.warns(None) as recorder:
-        _timelex('2014-03-03')
-
-        assert len(recorder) == 0
-
-    with pytest.warns(None) as recorder:
-        _parsetz('+05:00')
-        assert len(recorder) == 0
-
-
-@pytest.mark.tzstr
-def test_tzstr_internal_timedeltas():
-    with pytest.warns(tz.DeprecatedTzFormatWarning):
-        tz1 = tz.tzstr("EST5EDT,5,4,0,7200,11,-3,0,7200")
-
-    with pytest.warns(tz.DeprecatedTzFormatWarning):
-        tz2 = tz.tzstr("EST5EDT,4,1,0,7200,10,-1,0,7200")
-
-    assert tz1._start_delta != tz2._start_delta
-    assert tz1._end_delta != tz2._end_delta
+ 
+ 
+### 
+# Test that private interfaces in _parser are deprecated properly 
+@pytest.mark.skipif(IS_PY32, reason='pytest.warns not supported on Python 3.2') 
+def test_parser_private_warns(): 
+    from dateutil.parser import _timelex, _tzparser 
+    from dateutil.parser import _parsetz 
+ 
+    with pytest.warns(DeprecationWarning): 
+        _tzparser() 
+ 
+    with pytest.warns(DeprecationWarning): 
+        _timelex('2014-03-03') 
+ 
+    with pytest.warns(DeprecationWarning): 
+        _parsetz('+05:00') 
+ 
+ 
+@pytest.mark.skipif(IS_PY32, reason='pytest.warns not supported on Python 3.2') 
+def test_parser_parser_private_not_warns(): 
+    from dateutil.parser._parser import _timelex, _tzparser 
+    from dateutil.parser._parser import _parsetz 
+ 
+    with pytest.warns(None) as recorder: 
+        _tzparser() 
+        assert len(recorder) == 0 
+ 
+    with pytest.warns(None) as recorder: 
+        _timelex('2014-03-03') 
+ 
+        assert len(recorder) == 0 
+ 
+    with pytest.warns(None) as recorder: 
+        _parsetz('+05:00') 
+        assert len(recorder) == 0 
+ 
+ 
+@pytest.mark.tzstr 
+def test_tzstr_internal_timedeltas(): 
+    with pytest.warns(tz.DeprecatedTzFormatWarning): 
+        tz1 = tz.tzstr("EST5EDT,5,4,0,7200,11,-3,0,7200") 
+ 
+    with pytest.warns(tz.DeprecatedTzFormatWarning): 
+        tz2 = tz.tzstr("EST5EDT,4,1,0,7200,10,-1,0,7200") 
+ 
+    assert tz1._start_delta != tz2._start_delta 
+    assert tz1._end_delta != tz2._end_delta 
diff --git a/contrib/python/dateutil/dateutil/test/test_isoparser.py b/contrib/python/dateutil/dateutil/test/test_isoparser.py
index 35899ab9b1..d58bdae5a3 100644
--- a/contrib/python/dateutil/dateutil/test/test_isoparser.py
+++ b/contrib/python/dateutil/dateutil/test/test_isoparser.py
@@ -1,135 +1,135 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-from datetime import datetime, timedelta, date, time
-import itertools as it
-
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
+ 
+from datetime import datetime, timedelta, date, time 
+import itertools as it 
+ 
 from dateutil import tz
 from dateutil.tz import UTC
-from dateutil.parser import isoparser, isoparse
-
-import pytest
-import six
-
-
-def _generate_tzoffsets(limited):
-    def _mkoffset(hmtuple, fmt):
-        h, m = hmtuple
-        m_td = (-1 if h < 0 else 1) * m
-
-        tzo = tz.tzoffset(None, timedelta(hours=h, minutes=m_td))
-        return tzo, fmt.format(h, m)
-
-    out = []
-    if not limited:
-        # The subset that's just hours
-        hm_out_h = [(h, 0) for h in (-23, -5, 0, 5, 23)]
-        out.extend([_mkoffset(hm, '{:+03d}') for hm in hm_out_h])
-
-        # Ones that have hours and minutes
-        hm_out = [] + hm_out_h
-        hm_out += [(-12, 15), (11, 30), (10, 2), (5, 15), (-5, 30)]
-    else:
-        hm_out = [(-5, -0)]
-
-    fmts = ['{:+03d}:{:02d}', '{:+03d}{:02d}']
-    out += [_mkoffset(hm, fmt) for hm in hm_out for fmt in fmts]
-
-    # Also add in UTC and naive
+from dateutil.parser import isoparser, isoparse 
+ 
+import pytest 
+import six 
+ 
+ 
+def _generate_tzoffsets(limited): 
+    def _mkoffset(hmtuple, fmt): 
+        h, m = hmtuple 
+        m_td = (-1 if h < 0 else 1) * m 
+ 
+        tzo = tz.tzoffset(None, timedelta(hours=h, minutes=m_td)) 
+        return tzo, fmt.format(h, m) 
+ 
+    out = [] 
+    if not limited: 
+        # The subset that's just hours 
+        hm_out_h = [(h, 0) for h in (-23, -5, 0, 5, 23)] 
+        out.extend([_mkoffset(hm, '{:+03d}') for hm in hm_out_h]) 
+ 
+        # Ones that have hours and minutes 
+        hm_out = [] + hm_out_h 
+        hm_out += [(-12, 15), (11, 30), (10, 2), (5, 15), (-5, 30)] 
+    else: 
+        hm_out = [(-5, -0)] 
+ 
+    fmts = ['{:+03d}:{:02d}', '{:+03d}{:02d}'] 
+    out += [_mkoffset(hm, fmt) for hm in hm_out for fmt in fmts] 
+ 
+    # Also add in UTC and naive 
     out.append((UTC, 'Z'))
-    out.append((None, ''))
-
-    return out
-
-FULL_TZOFFSETS = _generate_tzoffsets(False)
-FULL_TZOFFSETS_AWARE = [x for x in FULL_TZOFFSETS if x[1]]
-TZOFFSETS = _generate_tzoffsets(True)
-
-DATES = [datetime(1996, 1, 1), datetime(2017, 1, 1)]
-@pytest.mark.parametrize('dt', tuple(DATES))
-def test_year_only(dt):
-    dtstr = dt.strftime('%Y')
-
-    assert isoparse(dtstr) == dt
-
-DATES += [datetime(2000, 2, 1), datetime(2017, 4, 1)]
-@pytest.mark.parametrize('dt', tuple(DATES))
-def test_year_month(dt):
-    fmt   = '%Y-%m'
-    dtstr = dt.strftime(fmt)
-
-    assert isoparse(dtstr) == dt
-
-DATES += [datetime(2016, 2, 29), datetime(2018, 3, 15)]
-YMD_FMTS = ('%Y%m%d', '%Y-%m-%d')
-@pytest.mark.parametrize('dt', tuple(DATES))
-@pytest.mark.parametrize('fmt', YMD_FMTS)
-def test_year_month_day(dt, fmt):
-    dtstr = dt.strftime(fmt)
-
-    assert isoparse(dtstr) == dt
-
-def _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset,
-                            microsecond_precision=None):
-    tzi, offset_str = tzoffset
-    fmt = date_fmt + 'T' + time_fmt
-    dt = dt.replace(tzinfo=tzi)
-    dtstr = dt.strftime(fmt)
-
-    if microsecond_precision is not None:
+    out.append((None, '')) 
+ 
+    return out 
+ 
+FULL_TZOFFSETS = _generate_tzoffsets(False) 
+FULL_TZOFFSETS_AWARE = [x for x in FULL_TZOFFSETS if x[1]] 
+TZOFFSETS = _generate_tzoffsets(True) 
+ 
+DATES = [datetime(1996, 1, 1), datetime(2017, 1, 1)] 
+@pytest.mark.parametrize('dt', tuple(DATES)) 
+def test_year_only(dt): 
+    dtstr = dt.strftime('%Y') 
+ 
+    assert isoparse(dtstr) == dt 
+ 
+DATES += [datetime(2000, 2, 1), datetime(2017, 4, 1)] 
+@pytest.mark.parametrize('dt', tuple(DATES)) 
+def test_year_month(dt): 
+    fmt   = '%Y-%m' 
+    dtstr = dt.strftime(fmt) 
+ 
+    assert isoparse(dtstr) == dt 
+ 
+DATES += [datetime(2016, 2, 29), datetime(2018, 3, 15)] 
+YMD_FMTS = ('%Y%m%d', '%Y-%m-%d') 
+@pytest.mark.parametrize('dt', tuple(DATES)) 
+@pytest.mark.parametrize('fmt', YMD_FMTS) 
+def test_year_month_day(dt, fmt): 
+    dtstr = dt.strftime(fmt) 
+ 
+    assert isoparse(dtstr) == dt 
+ 
+def _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset, 
+                            microsecond_precision=None): 
+    tzi, offset_str = tzoffset 
+    fmt = date_fmt + 'T' + time_fmt 
+    dt = dt.replace(tzinfo=tzi) 
+    dtstr = dt.strftime(fmt) 
+ 
+    if microsecond_precision is not None: 
         if not fmt.endswith('%f'):  # pragma: nocover
-            raise ValueError('Time format has no microseconds!')
-
+            raise ValueError('Time format has no microseconds!') 
+ 
         if microsecond_precision != 6: 
-            dtstr = dtstr[:-(6 - microsecond_precision)]
+            dtstr = dtstr[:-(6 - microsecond_precision)] 
         elif microsecond_precision > 6: # pragma: nocover
             raise ValueError('Precision must be 1-6') 
-
-    dtstr += offset_str
-
-    assert isoparse(dtstr) == dt
-
-DATETIMES = [datetime(1998, 4, 16, 12),
-             datetime(2019, 11, 18, 23),
-             datetime(2014, 12, 16, 4)]
-@pytest.mark.parametrize('dt', tuple(DATETIMES))
-@pytest.mark.parametrize('date_fmt', YMD_FMTS)
-@pytest.mark.parametrize('tzoffset', TZOFFSETS)
-def test_ymd_h(dt, date_fmt, tzoffset):
-    _isoparse_date_and_time(dt, date_fmt, '%H', tzoffset)
-
-DATETIMES = [datetime(2012, 1, 6, 9, 37)]
-@pytest.mark.parametrize('dt', tuple(DATETIMES))
-@pytest.mark.parametrize('date_fmt', YMD_FMTS)
-@pytest.mark.parametrize('time_fmt', ('%H%M', '%H:%M'))
-@pytest.mark.parametrize('tzoffset', TZOFFSETS)
-def test_ymd_hm(dt, date_fmt, time_fmt, tzoffset):
-    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset)
-
-DATETIMES = [datetime(2003, 9, 2, 22, 14, 2),
-             datetime(2003, 8, 8, 14, 9, 14),
-             datetime(2003, 4, 7, 6, 14, 59)]
-HMS_FMTS = ('%H%M%S', '%H:%M:%S')
-@pytest.mark.parametrize('dt', tuple(DATETIMES))
-@pytest.mark.parametrize('date_fmt', YMD_FMTS)
-@pytest.mark.parametrize('time_fmt', HMS_FMTS)
-@pytest.mark.parametrize('tzoffset', TZOFFSETS)
-def test_ymd_hms(dt, date_fmt, time_fmt, tzoffset):
-    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset)
-
-DATETIMES = [datetime(2017, 11, 27, 6, 14, 30, 123456)]
-@pytest.mark.parametrize('dt', tuple(DATETIMES))
-@pytest.mark.parametrize('date_fmt', YMD_FMTS)
+ 
+    dtstr += offset_str 
+ 
+    assert isoparse(dtstr) == dt 
+ 
+DATETIMES = [datetime(1998, 4, 16, 12), 
+             datetime(2019, 11, 18, 23), 
+             datetime(2014, 12, 16, 4)] 
+@pytest.mark.parametrize('dt', tuple(DATETIMES)) 
+@pytest.mark.parametrize('date_fmt', YMD_FMTS) 
+@pytest.mark.parametrize('tzoffset', TZOFFSETS) 
+def test_ymd_h(dt, date_fmt, tzoffset): 
+    _isoparse_date_and_time(dt, date_fmt, '%H', tzoffset) 
+ 
+DATETIMES = [datetime(2012, 1, 6, 9, 37)] 
+@pytest.mark.parametrize('dt', tuple(DATETIMES)) 
+@pytest.mark.parametrize('date_fmt', YMD_FMTS) 
+@pytest.mark.parametrize('time_fmt', ('%H%M', '%H:%M')) 
+@pytest.mark.parametrize('tzoffset', TZOFFSETS) 
+def test_ymd_hm(dt, date_fmt, time_fmt, tzoffset): 
+    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset) 
+ 
+DATETIMES = [datetime(2003, 9, 2, 22, 14, 2), 
+             datetime(2003, 8, 8, 14, 9, 14), 
+             datetime(2003, 4, 7, 6, 14, 59)] 
+HMS_FMTS = ('%H%M%S', '%H:%M:%S') 
+@pytest.mark.parametrize('dt', tuple(DATETIMES)) 
+@pytest.mark.parametrize('date_fmt', YMD_FMTS) 
+@pytest.mark.parametrize('time_fmt', HMS_FMTS) 
+@pytest.mark.parametrize('tzoffset', TZOFFSETS) 
+def test_ymd_hms(dt, date_fmt, time_fmt, tzoffset): 
+    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset) 
+ 
+DATETIMES = [datetime(2017, 11, 27, 6, 14, 30, 123456)] 
+@pytest.mark.parametrize('dt', tuple(DATETIMES)) 
+@pytest.mark.parametrize('date_fmt', YMD_FMTS) 
 @pytest.mark.parametrize('time_fmt', (x + sep + '%f' for x in HMS_FMTS
                                       for sep in '.,'))
-@pytest.mark.parametrize('tzoffset', TZOFFSETS)
-@pytest.mark.parametrize('precision', list(range(3, 7)))
-def test_ymd_hms_micro(dt, date_fmt, time_fmt, tzoffset, precision):
-    # Truncate the microseconds to the desired precision for the representation
-    dt = dt.replace(microsecond=int(round(dt.microsecond, precision-6)))
-
-    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset, precision)
-
+@pytest.mark.parametrize('tzoffset', TZOFFSETS) 
+@pytest.mark.parametrize('precision', list(range(3, 7))) 
+def test_ymd_hms_micro(dt, date_fmt, time_fmt, tzoffset, precision): 
+    # Truncate the microseconds to the desired precision for the representation 
+    dt = dt.replace(microsecond=int(round(dt.microsecond, precision-6))) 
+ 
+    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset, precision) 
+ 
 ###
 # Truncation of extra digits beyond microsecond precision
 @pytest.mark.parametrize('dt_str', [
@@ -139,262 +139,262 @@ def test_ymd_hms_micro(dt, date_fmt, time_fmt, tzoffset, precision):
 def test_extra_subsecond_digits(dt_str):
     assert isoparse(dt_str) == datetime(2018, 7, 3, 14, 7, 0, 123456)
 
-@pytest.mark.parametrize('tzoffset', FULL_TZOFFSETS)
-def test_full_tzoffsets(tzoffset):
-    dt = datetime(2017, 11, 27, 6, 14, 30, 123456)
-    date_fmt = '%Y-%m-%d'
-    time_fmt = '%H:%M:%S.%f'
-
-    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset)
-
-@pytest.mark.parametrize('dt_str', [
-    '2014-04-11T00',
+@pytest.mark.parametrize('tzoffset', FULL_TZOFFSETS) 
+def test_full_tzoffsets(tzoffset): 
+    dt = datetime(2017, 11, 27, 6, 14, 30, 123456) 
+    date_fmt = '%Y-%m-%d' 
+    time_fmt = '%H:%M:%S.%f' 
+ 
+    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset) 
+ 
+@pytest.mark.parametrize('dt_str', [ 
+    '2014-04-11T00', 
     '2014-04-10T24',
-    '2014-04-11T00:00',
+    '2014-04-11T00:00', 
     '2014-04-10T24:00',
-    '2014-04-11T00:00:00',
+    '2014-04-11T00:00:00', 
     '2014-04-10T24:00:00',
-    '2014-04-11T00:00:00.000',
+    '2014-04-11T00:00:00.000', 
     '2014-04-10T24:00:00.000',
-    '2014-04-11T00:00:00.000000',
+    '2014-04-11T00:00:00.000000', 
     '2014-04-10T24:00:00.000000']
-)
-def test_datetime_midnight(dt_str):
-    assert isoparse(dt_str) == datetime(2014, 4, 11, 0, 0, 0, 0)
-
-@pytest.mark.parametrize('datestr', [
-    '2014-01-01',
-    '20140101',
-])
-@pytest.mark.parametrize('sep', [' ', 'a', 'T', '_', '-'])
-def test_isoparse_sep_none(datestr, sep):
-    isostr = datestr + sep + '14:33:09'
-    assert isoparse(isostr) == datetime(2014, 1, 1, 14, 33, 9)
-
-##
-# Uncommon date formats
-TIME_ARGS = ('time_args',
-    ((None, time(0), None), ) + tuple(('%H:%M:%S.%f', _t, _tz)
-        for _t, _tz in it.product([time(0), time(9, 30), time(14, 47)],
-                                  TZOFFSETS)))
-
-@pytest.mark.parametrize('isocal,dt_expected',[
-    ((2017, 10), datetime(2017, 3, 6)),
-    ((2020, 1), datetime(2019, 12, 30)),    # ISO year != Cal year
-    ((2004, 53), datetime(2004, 12, 27)),   # Only half the week is in 2014
-])
-def test_isoweek(isocal, dt_expected):
-    # TODO: Figure out how to parametrize this on formats, too
-    for fmt in ('{:04d}-W{:02d}', '{:04d}W{:02d}'):
-        dtstr = fmt.format(*isocal)
-        assert isoparse(dtstr) == dt_expected
-
-@pytest.mark.parametrize('isocal,dt_expected',[
-    ((2016, 13, 7), datetime(2016, 4, 3)),
-    ((2004, 53, 7), datetime(2005, 1, 2)),      # ISO year != Cal year
-    ((2009, 1, 2), datetime(2008, 12, 30)),     # ISO year < Cal year
-    ((2009, 53, 6), datetime(2010, 1, 2))       # ISO year > Cal year
-])
-def test_isoweek_day(isocal, dt_expected):
-    # TODO: Figure out how to parametrize this on formats, too
-    for fmt in ('{:04d}-W{:02d}-{:d}', '{:04d}W{:02d}{:d}'):
-        dtstr = fmt.format(*isocal)
-        assert isoparse(dtstr) == dt_expected
-
-@pytest.mark.parametrize('isoord,dt_expected', [
-    ((2004, 1), datetime(2004, 1, 1)),
-    ((2016, 60), datetime(2016, 2, 29)),
-    ((2017, 60), datetime(2017, 3, 1)),
-    ((2016, 366), datetime(2016, 12, 31)),
-    ((2017, 365), datetime(2017, 12, 31))
-])
-def test_iso_ordinal(isoord, dt_expected):
-    for fmt in ('{:04d}-{:03d}', '{:04d}{:03d}'):
-        dtstr = fmt.format(*isoord)
-
-        assert isoparse(dtstr) == dt_expected
-
-
-###
-# Acceptance of bytes
-@pytest.mark.parametrize('isostr,dt', [
-    (b'2014', datetime(2014, 1, 1)),
-    (b'20140204', datetime(2014, 2, 4)),
-    (b'2014-02-04', datetime(2014, 2, 4)),
-    (b'2014-02-04T12', datetime(2014, 2, 4, 12)),
-    (b'2014-02-04T12:30', datetime(2014, 2, 4, 12, 30)),
-    (b'2014-02-04T12:30:15', datetime(2014, 2, 4, 12, 30, 15)),
-    (b'2014-02-04T12:30:15.224', datetime(2014, 2, 4, 12, 30, 15, 224000)),
-    (b'20140204T123015.224', datetime(2014, 2, 4, 12, 30, 15, 224000)),
-    (b'2014-02-04T12:30:15.224Z', datetime(2014, 2, 4, 12, 30, 15, 224000,
+) 
+def test_datetime_midnight(dt_str): 
+    assert isoparse(dt_str) == datetime(2014, 4, 11, 0, 0, 0, 0) 
+ 
+@pytest.mark.parametrize('datestr', [ 
+    '2014-01-01', 
+    '20140101', 
+]) 
+@pytest.mark.parametrize('sep', [' ', 'a', 'T', '_', '-']) 
+def test_isoparse_sep_none(datestr, sep): 
+    isostr = datestr + sep + '14:33:09' 
+    assert isoparse(isostr) == datetime(2014, 1, 1, 14, 33, 9) 
+ 
+## 
+# Uncommon date formats 
+TIME_ARGS = ('time_args', 
+    ((None, time(0), None), ) + tuple(('%H:%M:%S.%f', _t, _tz) 
+        for _t, _tz in it.product([time(0), time(9, 30), time(14, 47)], 
+                                  TZOFFSETS))) 
+ 
+@pytest.mark.parametrize('isocal,dt_expected',[ 
+    ((2017, 10), datetime(2017, 3, 6)), 
+    ((2020, 1), datetime(2019, 12, 30)),    # ISO year != Cal year 
+    ((2004, 53), datetime(2004, 12, 27)),   # Only half the week is in 2014 
+]) 
+def test_isoweek(isocal, dt_expected): 
+    # TODO: Figure out how to parametrize this on formats, too 
+    for fmt in ('{:04d}-W{:02d}', '{:04d}W{:02d}'): 
+        dtstr = fmt.format(*isocal) 
+        assert isoparse(dtstr) == dt_expected 
+ 
+@pytest.mark.parametrize('isocal,dt_expected',[ 
+    ((2016, 13, 7), datetime(2016, 4, 3)), 
+    ((2004, 53, 7), datetime(2005, 1, 2)),      # ISO year != Cal year 
+    ((2009, 1, 2), datetime(2008, 12, 30)),     # ISO year < Cal year 
+    ((2009, 53, 6), datetime(2010, 1, 2))       # ISO year > Cal year 
+]) 
+def test_isoweek_day(isocal, dt_expected): 
+    # TODO: Figure out how to parametrize this on formats, too 
+    for fmt in ('{:04d}-W{:02d}-{:d}', '{:04d}W{:02d}{:d}'): 
+        dtstr = fmt.format(*isocal) 
+        assert isoparse(dtstr) == dt_expected 
+ 
+@pytest.mark.parametrize('isoord,dt_expected', [ 
+    ((2004, 1), datetime(2004, 1, 1)), 
+    ((2016, 60), datetime(2016, 2, 29)), 
+    ((2017, 60), datetime(2017, 3, 1)), 
+    ((2016, 366), datetime(2016, 12, 31)), 
+    ((2017, 365), datetime(2017, 12, 31)) 
+]) 
+def test_iso_ordinal(isoord, dt_expected): 
+    for fmt in ('{:04d}-{:03d}', '{:04d}{:03d}'): 
+        dtstr = fmt.format(*isoord) 
+ 
+        assert isoparse(dtstr) == dt_expected 
+ 
+ 
+### 
+# Acceptance of bytes 
+@pytest.mark.parametrize('isostr,dt', [ 
+    (b'2014', datetime(2014, 1, 1)), 
+    (b'20140204', datetime(2014, 2, 4)), 
+    (b'2014-02-04', datetime(2014, 2, 4)), 
+    (b'2014-02-04T12', datetime(2014, 2, 4, 12)), 
+    (b'2014-02-04T12:30', datetime(2014, 2, 4, 12, 30)), 
+    (b'2014-02-04T12:30:15', datetime(2014, 2, 4, 12, 30, 15)), 
+    (b'2014-02-04T12:30:15.224', datetime(2014, 2, 4, 12, 30, 15, 224000)), 
+    (b'20140204T123015.224', datetime(2014, 2, 4, 12, 30, 15, 224000)), 
+    (b'2014-02-04T12:30:15.224Z', datetime(2014, 2, 4, 12, 30, 15, 224000, 
                                            UTC)),
     (b'2014-02-04T12:30:15.224z', datetime(2014, 2, 4, 12, 30, 15, 224000,
                                            UTC)),
-    (b'2014-02-04T12:30:15.224+05:00',
-        datetime(2014, 2, 4, 12, 30, 15, 224000,
-                 tzinfo=tz.tzoffset(None, timedelta(hours=5))))])
-def test_bytes(isostr, dt):
-    assert isoparse(isostr) == dt
-
-
-###
-# Invalid ISO strings
-@pytest.mark.parametrize('isostr,exception', [
-    ('201', ValueError),                        # ISO string too short
-    ('2012-0425', ValueError),                  # Inconsistent date separators
-    ('201204-25', ValueError),                  # Inconsistent date separators
-    ('20120425T0120:00', ValueError),           # Inconsistent time separators
+    (b'2014-02-04T12:30:15.224+05:00', 
+        datetime(2014, 2, 4, 12, 30, 15, 224000, 
+                 tzinfo=tz.tzoffset(None, timedelta(hours=5))))]) 
+def test_bytes(isostr, dt): 
+    assert isoparse(isostr) == dt 
+ 
+ 
+### 
+# Invalid ISO strings 
+@pytest.mark.parametrize('isostr,exception', [ 
+    ('201', ValueError),                        # ISO string too short 
+    ('2012-0425', ValueError),                  # Inconsistent date separators 
+    ('201204-25', ValueError),                  # Inconsistent date separators 
+    ('20120425T0120:00', ValueError),           # Inconsistent time separators 
     ('20120425T01:2000', ValueError),           # Inconsistent time separators
     ('14:3015', ValueError),                    # Inconsistent time separator
-    ('20120425T012500-334', ValueError),        # Wrong microsecond separator
-    ('2001-1', ValueError),                     # YYYY-M not valid
-    ('2012-04-9', ValueError),                  # YYYY-MM-D not valid
-    ('201204', ValueError),                     # YYYYMM not valid
-    ('20120411T03:30+', ValueError),            # Time zone too short
-    ('20120411T03:30+1234567', ValueError),     # Time zone too long
-    ('20120411T03:30-25:40', ValueError),       # Time zone invalid
-    ('2012-1a', ValueError),                    # Invalid month
-    ('20120411T03:30+00:60', ValueError),       # Time zone invalid minutes
-    ('20120411T03:30+00:61', ValueError),       # Time zone invalid minutes
-    ('20120411T033030.123456012:00',            # No sign in time zone
-        ValueError),
-    ('2012-W00', ValueError),                   # Invalid ISO week
-    ('2012-W55', ValueError),                   # Invalid ISO week
-    ('2012-W01-0', ValueError),                 # Invalid ISO week day
-    ('2012-W01-8', ValueError),                 # Invalid ISO week day
-    ('2013-000', ValueError),                   # Invalid ordinal day
-    ('2013-366', ValueError),                   # Invalid ordinal day
-    ('2013366', ValueError),                    # Invalid ordinal day
-    ('2014-03-12Т12:30:14', ValueError),        # Cyrillic T
-    ('2014-04-21T24:00:01', ValueError),        # Invalid use of 24 for midnight
-    ('2014_W01-1', ValueError),                 # Invalid separator
-    ('2014W01-1', ValueError),                  # Inconsistent use of dashes
-    ('2014-W011', ValueError),                  # Inconsistent use of dashes
-
-])
-def test_iso_raises(isostr, exception):
-    with pytest.raises(exception):
-        isoparse(isostr)
-
-
+    ('20120425T012500-334', ValueError),        # Wrong microsecond separator 
+    ('2001-1', ValueError),                     # YYYY-M not valid 
+    ('2012-04-9', ValueError),                  # YYYY-MM-D not valid 
+    ('201204', ValueError),                     # YYYYMM not valid 
+    ('20120411T03:30+', ValueError),            # Time zone too short 
+    ('20120411T03:30+1234567', ValueError),     # Time zone too long 
+    ('20120411T03:30-25:40', ValueError),       # Time zone invalid 
+    ('2012-1a', ValueError),                    # Invalid month 
+    ('20120411T03:30+00:60', ValueError),       # Time zone invalid minutes 
+    ('20120411T03:30+00:61', ValueError),       # Time zone invalid minutes 
+    ('20120411T033030.123456012:00',            # No sign in time zone 
+        ValueError), 
+    ('2012-W00', ValueError),                   # Invalid ISO week 
+    ('2012-W55', ValueError),                   # Invalid ISO week 
+    ('2012-W01-0', ValueError),                 # Invalid ISO week day 
+    ('2012-W01-8', ValueError),                 # Invalid ISO week day 
+    ('2013-000', ValueError),                   # Invalid ordinal day 
+    ('2013-366', ValueError),                   # Invalid ordinal day 
+    ('2013366', ValueError),                    # Invalid ordinal day 
+    ('2014-03-12Т12:30:14', ValueError),        # Cyrillic T 
+    ('2014-04-21T24:00:01', ValueError),        # Invalid use of 24 for midnight 
+    ('2014_W01-1', ValueError),                 # Invalid separator 
+    ('2014W01-1', ValueError),                  # Inconsistent use of dashes 
+    ('2014-W011', ValueError),                  # Inconsistent use of dashes 
+ 
+]) 
+def test_iso_raises(isostr, exception): 
+    with pytest.raises(exception): 
+        isoparse(isostr) 
+ 
+ 
 @pytest.mark.parametrize('sep_act, valid_sep, exception', [
     ('T', 'C', ValueError),
     ('C', 'T', ValueError),
-])
+]) 
 def test_iso_with_sep_raises(sep_act, valid_sep, exception):
     parser = isoparser(sep=valid_sep)
-    isostr = '2012-04-25' + sep_act + '01:25:00'
+    isostr = '2012-04-25' + sep_act + '01:25:00' 
     with pytest.raises(exception):
         parser.isoparse(isostr)
-
-
-###
-# Test ISOParser constructor
-@pytest.mark.parametrize('sep', ['  ', '9', '🍛'])
-def test_isoparser_invalid_sep(sep):
-    with pytest.raises(ValueError):
-        isoparser(sep=sep)
-
-
-# This only fails on Python 3
+ 
+ 
+### 
+# Test ISOParser constructor 
+@pytest.mark.parametrize('sep', ['  ', '9', '🍛']) 
+def test_isoparser_invalid_sep(sep): 
+    with pytest.raises(ValueError): 
+        isoparser(sep=sep) 
+ 
+ 
+# This only fails on Python 3 
 @pytest.mark.xfail(not six.PY2, reason="Fails on Python 3 only")
-def test_isoparser_byte_sep():
-    dt = datetime(2017, 12, 6, 12, 30, 45)
-    dt_str = dt.isoformat(sep=str('T'))
-
-    dt_rt = isoparser(sep=b'T').isoparse(dt_str)
-
-    assert dt == dt_rt
-
-
-###
-# Test parse_tzstr
-@pytest.mark.parametrize('tzoffset', FULL_TZOFFSETS)
-def test_parse_tzstr(tzoffset):
-    dt = datetime(2017, 11, 27, 6, 14, 30, 123456)
-    date_fmt = '%Y-%m-%d'
-    time_fmt = '%H:%M:%S.%f'
-
-    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset)
-
-
-@pytest.mark.parametrize('tzstr', [
-    '-00:00', '+00:00', '+00', '-00', '+0000', '-0000'
-])
-@pytest.mark.parametrize('zero_as_utc', [True, False])
-def test_parse_tzstr_zero_as_utc(tzstr, zero_as_utc):
-    tzi = isoparser().parse_tzstr(tzstr, zero_as_utc=zero_as_utc)
+def test_isoparser_byte_sep(): 
+    dt = datetime(2017, 12, 6, 12, 30, 45) 
+    dt_str = dt.isoformat(sep=str('T')) 
+ 
+    dt_rt = isoparser(sep=b'T').isoparse(dt_str) 
+ 
+    assert dt == dt_rt 
+ 
+ 
+### 
+# Test parse_tzstr 
+@pytest.mark.parametrize('tzoffset', FULL_TZOFFSETS) 
+def test_parse_tzstr(tzoffset): 
+    dt = datetime(2017, 11, 27, 6, 14, 30, 123456) 
+    date_fmt = '%Y-%m-%d' 
+    time_fmt = '%H:%M:%S.%f' 
+ 
+    _isoparse_date_and_time(dt, date_fmt, time_fmt, tzoffset) 
+ 
+ 
+@pytest.mark.parametrize('tzstr', [ 
+    '-00:00', '+00:00', '+00', '-00', '+0000', '-0000' 
+]) 
+@pytest.mark.parametrize('zero_as_utc', [True, False]) 
+def test_parse_tzstr_zero_as_utc(tzstr, zero_as_utc): 
+    tzi = isoparser().parse_tzstr(tzstr, zero_as_utc=zero_as_utc) 
     assert tzi == UTC
-    assert (type(tzi) == tz.tzutc) == zero_as_utc
-
-
-@pytest.mark.parametrize('tzstr,exception', [
-    ('00:00', ValueError),     # No sign
-    ('05:00', ValueError),     # No sign
-    ('_00:00', ValueError),    # Invalid sign
-    ('+25:00', ValueError),    # Offset too large
-    ('00:0000', ValueError),   # String too long
-])
-def test_parse_tzstr_fails(tzstr, exception):
-    with pytest.raises(exception):
-        isoparser().parse_tzstr(tzstr)
-
-###
-# Test parse_isodate
-def __make_date_examples():
-    dates_no_day = [
-        date(1999, 12, 1),
-        date(2016, 2, 1)
-    ]
-
+    assert (type(tzi) == tz.tzutc) == zero_as_utc 
+ 
+ 
+@pytest.mark.parametrize('tzstr,exception', [ 
+    ('00:00', ValueError),     # No sign 
+    ('05:00', ValueError),     # No sign 
+    ('_00:00', ValueError),    # Invalid sign 
+    ('+25:00', ValueError),    # Offset too large 
+    ('00:0000', ValueError),   # String too long 
+]) 
+def test_parse_tzstr_fails(tzstr, exception): 
+    with pytest.raises(exception): 
+        isoparser().parse_tzstr(tzstr) 
+ 
+### 
+# Test parse_isodate 
+def __make_date_examples(): 
+    dates_no_day = [ 
+        date(1999, 12, 1), 
+        date(2016, 2, 1) 
+    ] 
+ 
     if not six.PY2:
-        # strftime does not support dates before 1900 in Python 2
-        dates_no_day.append(date(1000, 11, 1))
-
-    # Only one supported format for dates with no day
-    o = zip(dates_no_day, it.repeat('%Y-%m'))
-
-    dates_w_day = [
-        date(1969, 12, 31),
-        date(1900, 1, 1),
-        date(2016, 2, 29),
-        date(2017, 11, 14)
-    ]
-
-    dates_w_day_fmts = ('%Y%m%d', '%Y-%m-%d')
-    o = it.chain(o, it.product(dates_w_day, dates_w_day_fmts))
-
-    return list(o)
-
-
-@pytest.mark.parametrize('d,dt_fmt', __make_date_examples())
-@pytest.mark.parametrize('as_bytes', [True, False])
-def test_parse_isodate(d, dt_fmt, as_bytes):
-    d_str = d.strftime(dt_fmt)
-    if isinstance(d_str, six.text_type) and as_bytes:
-        d_str = d_str.encode('ascii')
+        # strftime does not support dates before 1900 in Python 2 
+        dates_no_day.append(date(1000, 11, 1)) 
+ 
+    # Only one supported format for dates with no day 
+    o = zip(dates_no_day, it.repeat('%Y-%m')) 
+ 
+    dates_w_day = [ 
+        date(1969, 12, 31), 
+        date(1900, 1, 1), 
+        date(2016, 2, 29), 
+        date(2017, 11, 14) 
+    ] 
+ 
+    dates_w_day_fmts = ('%Y%m%d', '%Y-%m-%d') 
+    o = it.chain(o, it.product(dates_w_day, dates_w_day_fmts)) 
+ 
+    return list(o) 
+ 
+ 
+@pytest.mark.parametrize('d,dt_fmt', __make_date_examples()) 
+@pytest.mark.parametrize('as_bytes', [True, False]) 
+def test_parse_isodate(d, dt_fmt, as_bytes): 
+    d_str = d.strftime(dt_fmt) 
+    if isinstance(d_str, six.text_type) and as_bytes: 
+        d_str = d_str.encode('ascii') 
     elif isinstance(d_str, bytes) and not as_bytes:
-        d_str = d_str.decode('ascii')
-
-    iparser = isoparser()
-    assert iparser.parse_isodate(d_str) == d
-
-
-@pytest.mark.parametrize('isostr,exception', [
-    ('243', ValueError),                        # ISO string too short
-    ('2014-0423', ValueError),                  # Inconsistent date separators
-    ('201404-23', ValueError),                  # Inconsistent date separators
-    ('2014日03月14', ValueError),                # Not ASCII
-    ('2013-02-29', ValueError),                 # Not a leap year
-    ('2014/12/03', ValueError),                 # Wrong separators
-    ('2014-04-19T', ValueError),                # Unknown components
+        d_str = d_str.decode('ascii') 
+ 
+    iparser = isoparser() 
+    assert iparser.parse_isodate(d_str) == d 
+ 
+ 
+@pytest.mark.parametrize('isostr,exception', [ 
+    ('243', ValueError),                        # ISO string too short 
+    ('2014-0423', ValueError),                  # Inconsistent date separators 
+    ('201404-23', ValueError),                  # Inconsistent date separators 
+    ('2014日03月14', ValueError),                # Not ASCII 
+    ('2013-02-29', ValueError),                 # Not a leap year 
+    ('2014/12/03', ValueError),                 # Wrong separators 
+    ('2014-04-19T', ValueError),                # Unknown components 
     ('201202', ValueError),                     # Invalid format
-])
-def test_isodate_raises(isostr, exception):
-    with pytest.raises(exception):
-        isoparser().parse_isodate(isostr)
-
-
+]) 
+def test_isodate_raises(isostr, exception): 
+    with pytest.raises(exception): 
+        isoparser().parse_isodate(isostr) 
+ 
+ 
 def test_parse_isodate_error_text():
     with pytest.raises(ValueError) as excinfo:
         isoparser().parse_isodate('2014-0423')
@@ -407,66 +407,66 @@ def test_parse_isodate_error_text():
     assert expected_error == str(excinfo.value)
 
 
-###
-# Test parse_isotime
-def __make_time_examples():
-    outputs = []
-
-    # HH
-    time_h = [time(0), time(8), time(22)]
-    time_h_fmts = ['%H']
-
-    outputs.append(it.product(time_h, time_h_fmts))
-
-    # HHMM / HH:MM
-    time_hm = [time(0, 0), time(0, 30), time(8, 47), time(16, 1)]
-    time_hm_fmts = ['%H%M', '%H:%M']
-
-    outputs.append(it.product(time_hm, time_hm_fmts))
-
-    # HHMMSS / HH:MM:SS
-    time_hms = [time(0, 0, 0), time(0, 15, 30),
-                time(8, 2, 16), time(12, 0), time(16, 2), time(20, 45)]
-
-    time_hms_fmts = ['%H%M%S', '%H:%M:%S']
-
-    outputs.append(it.product(time_hms, time_hms_fmts))
-
-    # HHMMSS.ffffff / HH:MM:SS.ffffff
-    time_hmsu = [time(0, 0, 0, 0), time(4, 15, 3, 247993),
-                 time(14, 21, 59, 948730),
-                 time(23, 59, 59, 999999)]
-
-    time_hmsu_fmts = ['%H%M%S.%f', '%H:%M:%S.%f']
-
-    outputs.append(it.product(time_hmsu, time_hmsu_fmts))
-
-    outputs = list(map(list, outputs))
-
-    # Time zones
-    ex_naive = list(it.chain.from_iterable(x[0:2] for x in outputs))
-    o = it.product(ex_naive, TZOFFSETS)    # ((time, fmt), (tzinfo, offsetstr))
-    o = ((t.replace(tzinfo=tzi), fmt + off_str)
-         for (t, fmt), (tzi, off_str) in o)
-
-    outputs.append(o)
-
-    return list(it.chain.from_iterable(outputs))
-
-
-@pytest.mark.parametrize('time_val,time_fmt', __make_time_examples())
-@pytest.mark.parametrize('as_bytes', [True, False])
-def test_isotime(time_val, time_fmt, as_bytes):
-    tstr = time_val.strftime(time_fmt)
+### 
+# Test parse_isotime 
+def __make_time_examples(): 
+    outputs = [] 
+ 
+    # HH 
+    time_h = [time(0), time(8), time(22)] 
+    time_h_fmts = ['%H'] 
+ 
+    outputs.append(it.product(time_h, time_h_fmts)) 
+ 
+    # HHMM / HH:MM 
+    time_hm = [time(0, 0), time(0, 30), time(8, 47), time(16, 1)] 
+    time_hm_fmts = ['%H%M', '%H:%M'] 
+ 
+    outputs.append(it.product(time_hm, time_hm_fmts)) 
+ 
+    # HHMMSS / HH:MM:SS 
+    time_hms = [time(0, 0, 0), time(0, 15, 30), 
+                time(8, 2, 16), time(12, 0), time(16, 2), time(20, 45)] 
+ 
+    time_hms_fmts = ['%H%M%S', '%H:%M:%S'] 
+ 
+    outputs.append(it.product(time_hms, time_hms_fmts)) 
+ 
+    # HHMMSS.ffffff / HH:MM:SS.ffffff 
+    time_hmsu = [time(0, 0, 0, 0), time(4, 15, 3, 247993), 
+                 time(14, 21, 59, 948730), 
+                 time(23, 59, 59, 999999)] 
+ 
+    time_hmsu_fmts = ['%H%M%S.%f', '%H:%M:%S.%f'] 
+ 
+    outputs.append(it.product(time_hmsu, time_hmsu_fmts)) 
+ 
+    outputs = list(map(list, outputs)) 
+ 
+    # Time zones 
+    ex_naive = list(it.chain.from_iterable(x[0:2] for x in outputs)) 
+    o = it.product(ex_naive, TZOFFSETS)    # ((time, fmt), (tzinfo, offsetstr)) 
+    o = ((t.replace(tzinfo=tzi), fmt + off_str) 
+         for (t, fmt), (tzi, off_str) in o) 
+ 
+    outputs.append(o) 
+ 
+    return list(it.chain.from_iterable(outputs)) 
+ 
+ 
+@pytest.mark.parametrize('time_val,time_fmt', __make_time_examples()) 
+@pytest.mark.parametrize('as_bytes', [True, False]) 
+def test_isotime(time_val, time_fmt, as_bytes): 
+    tstr = time_val.strftime(time_fmt) 
     if isinstance(tstr, six.text_type) and as_bytes:
-        tstr = tstr.encode('ascii')
+        tstr = tstr.encode('ascii') 
     elif isinstance(tstr, bytes) and not as_bytes:
-        tstr = tstr.decode('ascii')
-
-    iparser = isoparser()
-
-    assert iparser.parse_isotime(tstr) == time_val
-
+        tstr = tstr.decode('ascii') 
+ 
+    iparser = isoparser() 
+ 
+    assert iparser.parse_isotime(tstr) == time_val 
+ 
 
 @pytest.mark.parametrize('isostr', [
     '24:00',
@@ -483,27 +483,27 @@ def test_isotime_midnight(isostr):
     assert iparser.parse_isotime(isostr) == time(0, 0, 0, 0)
 
 
-@pytest.mark.parametrize('isostr,exception', [
-    ('3', ValueError),                          # ISO string too short
-    ('14時30分15秒', ValueError),                # Not ASCII
-    ('14_30_15', ValueError),                   # Invalid separators
-    ('1430:15', ValueError),                    # Inconsistent separator use
-    ('25', ValueError),                         # Invalid hours
-    ('25:15', ValueError),                      # Invalid hours
-    ('14:60', ValueError),                      # Invalid minutes
-    ('14:59:61', ValueError),                   # Invalid seconds
+@pytest.mark.parametrize('isostr,exception', [ 
+    ('3', ValueError),                          # ISO string too short 
+    ('14時30分15秒', ValueError),                # Not ASCII 
+    ('14_30_15', ValueError),                   # Invalid separators 
+    ('1430:15', ValueError),                    # Inconsistent separator use 
+    ('25', ValueError),                         # Invalid hours 
+    ('25:15', ValueError),                      # Invalid hours 
+    ('14:60', ValueError),                      # Invalid minutes 
+    ('14:59:61', ValueError),                   # Invalid seconds 
     ('14:30:15.34468305:00', ValueError),       # No sign in time zone
-    ('14:30:15+', ValueError),                  # Time zone too short
-    ('14:30:15+1234567', ValueError),           # Time zone invalid
-    ('14:59:59+25:00', ValueError),             # Invalid tz hours
-    ('14:59:59+12:62', ValueError),             # Invalid tz minutes
-    ('14:59:30_344583', ValueError),            # Invalid microsecond separator
+    ('14:30:15+', ValueError),                  # Time zone too short 
+    ('14:30:15+1234567', ValueError),           # Time zone invalid 
+    ('14:59:59+25:00', ValueError),             # Invalid tz hours 
+    ('14:59:59+12:62', ValueError),             # Invalid tz minutes 
+    ('14:59:30_344583', ValueError),            # Invalid microsecond separator 
     ('24:01', ValueError),                      # 24 used for non-midnight time
     ('24:00:01', ValueError),                   # 24 used for non-midnight time
     ('24:00:00.001', ValueError),               # 24 used for non-midnight time
     ('24:00:00.000001', ValueError),            # 24 used for non-midnight time
-])
-def test_isotime_raises(isostr, exception):
-    iparser = isoparser()
-    with pytest.raises(exception):
-        iparser.parse_isotime(isostr)
+]) 
+def test_isotime_raises(isostr, exception): 
+    iparser = isoparser() 
+    with pytest.raises(exception): 
+        iparser.parse_isotime(isostr) 
diff --git a/contrib/python/dateutil/dateutil/test/test_parser.py b/contrib/python/dateutil/dateutil/test/test_parser.py
index 08a34dafbc..bfdb7b1aeb 100644
--- a/contrib/python/dateutil/dateutil/test/test_parser.py
+++ b/contrib/python/dateutil/dateutil/test/test_parser.py
@@ -1,34 +1,34 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-import itertools
-from datetime import datetime, timedelta
-import unittest
-import sys
-
-from dateutil import tz
-from dateutil.tz import tzoffset
-from dateutil.parser import parse, parserinfo
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
+ 
+import itertools 
+from datetime import datetime, timedelta 
+import unittest 
+import sys 
+ 
+from dateutil import tz 
+from dateutil.tz import tzoffset 
+from dateutil.parser import parse, parserinfo 
 from dateutil.parser import ParserError
-from dateutil.parser import UnknownTimezoneWarning
-
-from ._common import TZEnvContext
-
+from dateutil.parser import UnknownTimezoneWarning 
+ 
+from ._common import TZEnvContext 
+ 
 from six import assertRaisesRegex, PY2
 from io import StringIO
-
-import pytest
-
-# Platform info
-IS_WIN = sys.platform.startswith('win')
-
+ 
+import pytest 
+ 
+# Platform info 
+IS_WIN = sys.platform.startswith('win') 
+ 
 PLATFORM_HAS_DASH_D = False
-try:
+try: 
     if datetime.now().strftime('%-d'):
         PLATFORM_HAS_DASH_D = True
-except ValueError:
+except ValueError: 
     pass
-
+ 
 
 @pytest.fixture(params=[True, False])
 def fuzzy(request):
@@ -103,7 +103,7 @@ PARSER_TEST_CASES = [
 ]
 # Check that we don't have any duplicates
 assert len(set([x[0] for x in PARSER_TEST_CASES])) == len(PARSER_TEST_CASES)
-
+ 
 
 @pytest.mark.parametrize("parsable_text,expected_datetime,assertion_message", PARSER_TEST_CASES)
 def test_parser(parsable_text, expected_datetime, assertion_message):
@@ -174,7 +174,7 @@ def test_parse_dayfirst(sep):
     dstr = expected.strftime(fmt)
     result = parse(dstr, dayfirst=True)
     assert result == expected
-
+ 
 
 @pytest.mark.parametrize('sep', ['-', '.', '/', ' '])
 def test_parse_yearfirst(sep):
@@ -225,31 +225,31 @@ def test_parse_with_tzoffset(dstr, expected):
 
 class TestFormat(object):
 
-    def test_ybd(self):
-        # If we have a 4-digit year, a non-numeric month (abbreviated or not),
-        # and a day (1 or 2 digits), then there is no ambiguity as to which
-        # token is a year/month/day.  This holds regardless of what order the
-        # terms are in and for each of the separators below.
-
-        seps = ['-', ' ', '/', '.']
-
-        year_tokens = ['%Y']
-        month_tokens = ['%b', '%B']
-        day_tokens = ['%d']
-        if PLATFORM_HAS_DASH_D:
-            day_tokens.append('%-d')
-
-        prods = itertools.product(year_tokens, month_tokens, day_tokens)
-        perms = [y for x in prods for y in itertools.permutations(x)]
-        unambig_fmts = [sep.join(perm) for sep in seps for perm in perms]
-
-        actual = datetime(2003, 9, 25)
-
-        for fmt in unambig_fmts:
-            dstr = actual.strftime(fmt)
-            res = parse(dstr)
+    def test_ybd(self): 
+        # If we have a 4-digit year, a non-numeric month (abbreviated or not), 
+        # and a day (1 or 2 digits), then there is no ambiguity as to which 
+        # token is a year/month/day.  This holds regardless of what order the 
+        # terms are in and for each of the separators below. 
+ 
+        seps = ['-', ' ', '/', '.'] 
+ 
+        year_tokens = ['%Y'] 
+        month_tokens = ['%b', '%B'] 
+        day_tokens = ['%d'] 
+        if PLATFORM_HAS_DASH_D: 
+            day_tokens.append('%-d') 
+ 
+        prods = itertools.product(year_tokens, month_tokens, day_tokens) 
+        perms = [y for x in prods for y in itertools.permutations(x)] 
+        unambig_fmts = [sep.join(perm) for sep in seps for perm in perms] 
+ 
+        actual = datetime(2003, 9, 25) 
+ 
+        for fmt in unambig_fmts: 
+            dstr = actual.strftime(fmt) 
+            res = parse(dstr) 
             assert res == actual
-
+ 
     # TODO: some redundancy with PARSER_TEST_CASES cases
     @pytest.mark.parametrize("fmt,dstr", [
         ("%a %b %d %Y", "Thu Sep 25 2003"),
@@ -282,7 +282,7 @@ class TestFormat(object):
     ])
     def test_strftime_formats_2003Sep25(self, fmt, dstr):
         expected = datetime(2003, 9, 25)
-
+ 
         # First check that the format strings behave as expected
         #  (not strictly necessary, but nice to have)
         assert expected.strftime(fmt) == dstr
@@ -294,54 +294,54 @@ class TestFormat(object):
 class TestInputTypes(object):
     def test_empty_string_invalid(self):
         with pytest.raises(ParserError):
-            parse('')
-
+            parse('') 
+ 
     def test_none_invalid(self):
         with pytest.raises(TypeError):
-            parse(None)
-
+            parse(None) 
+ 
     def test_int_invalid(self):
         with pytest.raises(TypeError):
-            parse(13)
-
+            parse(13) 
+ 
     def test_duck_typing(self):
-        # We want to support arbitrary classes that implement the stream
-        # interface.
-
-        class StringPassThrough(object):
-            def __init__(self, stream):
-                self.stream = stream
-
-            def read(self, *args, **kwargs):
-                return self.stream.read(*args, **kwargs)
-
-        dstr = StringPassThrough(StringIO('2014 January 19'))
-
+        # We want to support arbitrary classes that implement the stream 
+        # interface. 
+ 
+        class StringPassThrough(object): 
+            def __init__(self, stream): 
+                self.stream = stream 
+ 
+            def read(self, *args, **kwargs): 
+                return self.stream.read(*args, **kwargs) 
+ 
+        dstr = StringPassThrough(StringIO('2014 January 19')) 
+ 
         res = parse(dstr)
         expected = datetime(2014, 1, 19)
         assert res == expected
-
+ 
     def test_parse_stream(self):
-        dstr = StringIO('2014 January 19')
-
+        dstr = StringIO('2014 January 19') 
+ 
         res = parse(dstr)
         expected = datetime(2014, 1, 19)
         assert res == expected
-
+ 
     def test_parse_str(self):
         # Parser should be able to handle bytestring and unicode
         uni_str = '2014-05-01 08:00:00'
         bytes_str = uni_str.encode()
-
+ 
         res = parse(bytes_str)
         expected = parse(uni_str)
         assert res == expected
-
+ 
     def test_parse_bytes(self):
         res = parse(b'2014 January 19')
         expected = datetime(2014, 1, 19)
         assert res == expected
-
+ 
     def test_parse_bytearray(self):
         # GH#417
         res = parse(bytearray(b'2014 January 19'))
@@ -417,315 +417,315 @@ class ParserTest(unittest.TestCase):
         cls.uni_str = '2014-05-01 08:00:00'
         cls.str_str = cls.uni_str.encode()
 
-    def testParserParseStr(self):
-        from dateutil.parser import parser
-
+    def testParserParseStr(self): 
+        from dateutil.parser import parser 
+ 
         assert parser().parse(self.str_str) == parser().parse(self.uni_str)
-
-    def testParseUnicodeWords(self):
-
-        class rus_parserinfo(parserinfo):
-            MONTHS = [("янв", "Январь"),
-                      ("фев", "Февраль"),
-                      ("мар", "Март"),
-                      ("апр", "Апрель"),
-                      ("май", "Май"),
-                      ("июн", "Июнь"),
-                      ("июл", "Июль"),
-                      ("авг", "Август"),
-                      ("сен", "Сентябрь"),
-                      ("окт", "Октябрь"),
-                      ("ноя", "Ноябрь"),
-                      ("дек", "Декабрь")]
-
+ 
+    def testParseUnicodeWords(self): 
+ 
+        class rus_parserinfo(parserinfo): 
+            MONTHS = [("янв", "Январь"), 
+                      ("фев", "Февраль"), 
+                      ("мар", "Март"), 
+                      ("апр", "Апрель"), 
+                      ("май", "Май"), 
+                      ("июн", "Июнь"), 
+                      ("июл", "Июль"), 
+                      ("авг", "Август"), 
+                      ("сен", "Сентябрь"), 
+                      ("окт", "Октябрь"), 
+                      ("ноя", "Ноябрь"), 
+                      ("дек", "Декабрь")] 
+ 
         expected = datetime(2015, 9, 10, 10, 20)
         res = parse('10 Сентябрь 2015 10:20', parserinfo=rus_parserinfo())
         assert res  == expected
-
-    def testParseWithNulls(self):
-        # This relies on the from __future__ import unicode_literals, because
-        # explicitly specifying a unicode literal is a syntax error in Py 3.2
-        # May want to switch to u'...' if we ever drop Python 3.2 support.
-        pstring = '\x00\x00August 29, 1924'
-
+ 
+    def testParseWithNulls(self): 
+        # This relies on the from __future__ import unicode_literals, because 
+        # explicitly specifying a unicode literal is a syntax error in Py 3.2 
+        # May want to switch to u'...' if we ever drop Python 3.2 support. 
+        pstring = '\x00\x00August 29, 1924' 
+ 
         assert parse(pstring) == datetime(1924, 8, 29)
-
-    def testDateCommandFormat(self):
-        self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003",
-                               tzinfos=self.tzinfos),
-                         datetime(2003, 9, 25, 10, 36, 28,
-                                  tzinfo=self.brsttz))
-
-    def testDateCommandFormatReversed(self):
-        self.assertEqual(parse("2003 10:36:28 BRST 25 Sep Thu",
-                               tzinfos=self.tzinfos),
-                         datetime(2003, 9, 25, 10, 36, 28,
-                                  tzinfo=self.brsttz))
-
-    def testDateCommandFormatWithLong(self):
+ 
+    def testDateCommandFormat(self): 
+        self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003", 
+                               tzinfos=self.tzinfos), 
+                         datetime(2003, 9, 25, 10, 36, 28, 
+                                  tzinfo=self.brsttz)) 
+ 
+    def testDateCommandFormatReversed(self): 
+        self.assertEqual(parse("2003 10:36:28 BRST 25 Sep Thu", 
+                               tzinfos=self.tzinfos), 
+                         datetime(2003, 9, 25, 10, 36, 28, 
+                                  tzinfo=self.brsttz)) 
+ 
+    def testDateCommandFormatWithLong(self): 
         if PY2:
-            self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003",
-                                   tzinfos={"BRST": long(-10800)}),
-                             datetime(2003, 9, 25, 10, 36, 28,
-                                      tzinfo=self.brsttz))
+            self.assertEqual(parse("Thu Sep 25 10:36:28 BRST 2003", 
+                                   tzinfos={"BRST": long(-10800)}), 
+                             datetime(2003, 9, 25, 10, 36, 28, 
+                                      tzinfo=self.brsttz)) 
 
-    def testISOFormatStrip2(self):
+    def testISOFormatStrip2(self): 
         self.assertEqual(parse("2003-09-25T10:49:41+03:00"),
                          datetime(2003, 9, 25, 10, 49, 41,
                                   tzinfo=tzoffset(None, 10800)))
-
-    def testISOStrippedFormatStrip2(self):
+ 
+    def testISOStrippedFormatStrip2(self): 
         self.assertEqual(parse("20030925T104941+0300"),
                          datetime(2003, 9, 25, 10, 49, 41,
                                   tzinfo=tzoffset(None, 10800)))
-
-    def testAMPMNoHour(self):
+ 
+    def testAMPMNoHour(self): 
         with pytest.raises(ParserError):
-            parse("AM")
-
+            parse("AM") 
+ 
         with pytest.raises(ParserError):
-            parse("Jan 20, 2015 PM")
-
-    def testAMPMRange(self):
+            parse("Jan 20, 2015 PM") 
+ 
+    def testAMPMRange(self): 
         with pytest.raises(ParserError):
-            parse("13:44 AM")
-
+            parse("13:44 AM") 
+ 
         with pytest.raises(ParserError):
-            parse("January 25, 1921 23:13 PM")
-
-    def testPertain(self):
-        self.assertEqual(parse("Sep 03", default=self.default),
-                         datetime(2003, 9, 3))
-        self.assertEqual(parse("Sep of 03", default=self.default),
-                         datetime(2003, 9, 25))
-
-    def testFuzzy(self):
-        s = "Today is 25 of September of 2003, exactly " \
-            "at 10:49:41 with timezone -03:00."
-        self.assertEqual(parse(s, fuzzy=True),
-                         datetime(2003, 9, 25, 10, 49, 41,
-                                  tzinfo=self.brsttz))
-
-    def testFuzzyWithTokens(self):
-        s1 = "Today is 25 of September of 2003, exactly " \
-            "at 10:49:41 with timezone -03:00."
-        self.assertEqual(parse(s1, fuzzy_with_tokens=True),
-                         (datetime(2003, 9, 25, 10, 49, 41,
-                                   tzinfo=self.brsttz),
-                         ('Today is ', 'of ', ', exactly at ',
-                          ' with timezone ', '.')))
-
-        s2 = "http://biz.yahoo.com/ipo/p/600221.html"
-        self.assertEqual(parse(s2, fuzzy_with_tokens=True),
-                         (datetime(2060, 2, 21, 0, 0, 0),
-                         ('http://biz.yahoo.com/ipo/p/', '.html')))
-
-    def testFuzzyAMPMProblem(self):
-        # Sometimes fuzzy parsing results in AM/PM flag being set without
-        # hours - if it's fuzzy it should ignore that.
-        s1 = "I have a meeting on March 1, 1974."
-        s2 = "On June 8th, 2020, I am going to be the first man on Mars"
-
-        # Also don't want any erroneous AM or PMs changing the parsed time
-        s3 = "Meet me at the AM/PM on Sunset at 3:00 AM on December 3rd, 2003"
-        s4 = "Meet me at 3:00AM on December 3rd, 2003 at the AM/PM on Sunset"
-
-        self.assertEqual(parse(s1, fuzzy=True), datetime(1974, 3, 1))
-        self.assertEqual(parse(s2, fuzzy=True), datetime(2020, 6, 8))
-        self.assertEqual(parse(s3, fuzzy=True), datetime(2003, 12, 3, 3))
-        self.assertEqual(parse(s4, fuzzy=True), datetime(2003, 12, 3, 3))
-
-    def testFuzzyIgnoreAMPM(self):
-        s1 = "Jan 29, 1945 14:45 AM I going to see you there?"
-        with pytest.warns(UnknownTimezoneWarning):
-            res = parse(s1, fuzzy=True)
-        self.assertEqual(res, datetime(1945, 1, 29, 14, 45))
-
-    def testRandomFormat24(self):
-        self.assertEqual(parse("0:00 PM, PST", default=self.default,
-                               ignoretz=True),
-                         datetime(2003, 9, 25, 12, 0))
-
-    def testRandomFormat26(self):
-        with pytest.warns(UnknownTimezoneWarning):
-            res = parse("5:50 A.M. on June 13, 1990")
-
-        self.assertEqual(res, datetime(1990, 6, 13, 5, 50))
-
-    def testUnspecifiedDayFallback(self):
-        # Test that for an unspecified day, the fallback behavior is correct.
-        self.assertEqual(parse("April 2009", default=datetime(2010, 1, 31)),
-                         datetime(2009, 4, 30))
-
-    def testUnspecifiedDayFallbackFebNoLeapYear(self):
-        self.assertEqual(parse("Feb 2007", default=datetime(2010, 1, 31)),
-                         datetime(2007, 2, 28))
-
-    def testUnspecifiedDayFallbackFebLeapYear(self):
-        self.assertEqual(parse("Feb 2008", default=datetime(2010, 1, 31)),
-                         datetime(2008, 2, 29))
-
-    def testErrorType01(self):
+            parse("January 25, 1921 23:13 PM") 
+ 
+    def testPertain(self): 
+        self.assertEqual(parse("Sep 03", default=self.default), 
+                         datetime(2003, 9, 3)) 
+        self.assertEqual(parse("Sep of 03", default=self.default), 
+                         datetime(2003, 9, 25)) 
+ 
+    def testFuzzy(self): 
+        s = "Today is 25 of September of 2003, exactly " \ 
+            "at 10:49:41 with timezone -03:00." 
+        self.assertEqual(parse(s, fuzzy=True), 
+                         datetime(2003, 9, 25, 10, 49, 41, 
+                                  tzinfo=self.brsttz)) 
+ 
+    def testFuzzyWithTokens(self): 
+        s1 = "Today is 25 of September of 2003, exactly " \ 
+            "at 10:49:41 with timezone -03:00." 
+        self.assertEqual(parse(s1, fuzzy_with_tokens=True), 
+                         (datetime(2003, 9, 25, 10, 49, 41, 
+                                   tzinfo=self.brsttz), 
+                         ('Today is ', 'of ', ', exactly at ', 
+                          ' with timezone ', '.'))) 
+ 
+        s2 = "http://biz.yahoo.com/ipo/p/600221.html" 
+        self.assertEqual(parse(s2, fuzzy_with_tokens=True), 
+                         (datetime(2060, 2, 21, 0, 0, 0), 
+                         ('http://biz.yahoo.com/ipo/p/', '.html'))) 
+ 
+    def testFuzzyAMPMProblem(self): 
+        # Sometimes fuzzy parsing results in AM/PM flag being set without 
+        # hours - if it's fuzzy it should ignore that. 
+        s1 = "I have a meeting on March 1, 1974." 
+        s2 = "On June 8th, 2020, I am going to be the first man on Mars" 
+ 
+        # Also don't want any erroneous AM or PMs changing the parsed time 
+        s3 = "Meet me at the AM/PM on Sunset at 3:00 AM on December 3rd, 2003" 
+        s4 = "Meet me at 3:00AM on December 3rd, 2003 at the AM/PM on Sunset" 
+ 
+        self.assertEqual(parse(s1, fuzzy=True), datetime(1974, 3, 1)) 
+        self.assertEqual(parse(s2, fuzzy=True), datetime(2020, 6, 8)) 
+        self.assertEqual(parse(s3, fuzzy=True), datetime(2003, 12, 3, 3)) 
+        self.assertEqual(parse(s4, fuzzy=True), datetime(2003, 12, 3, 3)) 
+ 
+    def testFuzzyIgnoreAMPM(self): 
+        s1 = "Jan 29, 1945 14:45 AM I going to see you there?" 
+        with pytest.warns(UnknownTimezoneWarning): 
+            res = parse(s1, fuzzy=True) 
+        self.assertEqual(res, datetime(1945, 1, 29, 14, 45)) 
+ 
+    def testRandomFormat24(self): 
+        self.assertEqual(parse("0:00 PM, PST", default=self.default, 
+                               ignoretz=True), 
+                         datetime(2003, 9, 25, 12, 0)) 
+ 
+    def testRandomFormat26(self): 
+        with pytest.warns(UnknownTimezoneWarning): 
+            res = parse("5:50 A.M. on June 13, 1990") 
+ 
+        self.assertEqual(res, datetime(1990, 6, 13, 5, 50)) 
+ 
+    def testUnspecifiedDayFallback(self): 
+        # Test that for an unspecified day, the fallback behavior is correct. 
+        self.assertEqual(parse("April 2009", default=datetime(2010, 1, 31)), 
+                         datetime(2009, 4, 30)) 
+ 
+    def testUnspecifiedDayFallbackFebNoLeapYear(self): 
+        self.assertEqual(parse("Feb 2007", default=datetime(2010, 1, 31)), 
+                         datetime(2007, 2, 28)) 
+ 
+    def testUnspecifiedDayFallbackFebLeapYear(self): 
+        self.assertEqual(parse("Feb 2008", default=datetime(2010, 1, 31)), 
+                         datetime(2008, 2, 29)) 
+ 
+    def testErrorType01(self): 
         with pytest.raises(ParserError):
             parse('shouldfail')
-
-    def testCorrectErrorOnFuzzyWithTokens(self):
+ 
+    def testCorrectErrorOnFuzzyWithTokens(self): 
         assertRaisesRegex(self, ParserError, 'Unknown string format',
-                          parse, '04/04/32/423', fuzzy_with_tokens=True)
+                          parse, '04/04/32/423', fuzzy_with_tokens=True) 
         assertRaisesRegex(self, ParserError, 'Unknown string format',
-                          parse, '04/04/04 +32423', fuzzy_with_tokens=True)
+                          parse, '04/04/04 +32423', fuzzy_with_tokens=True) 
         assertRaisesRegex(self, ParserError, 'Unknown string format',
-                          parse, '04/04/0d4', fuzzy_with_tokens=True)
-
-    def testIncreasingCTime(self):
-        # This test will check 200 different years, every month, every day,
-        # every hour, every minute, every second, and every weekday, using
-        # a delta of more or less 1 year, 1 month, 1 day, 1 minute and
-        # 1 second.
-        delta = timedelta(days=365+31+1, seconds=1+60+60*60)
-        dt = datetime(1900, 1, 1, 0, 0, 0, 0)
-        for i in range(200):
+                          parse, '04/04/0d4', fuzzy_with_tokens=True) 
+ 
+    def testIncreasingCTime(self): 
+        # This test will check 200 different years, every month, every day, 
+        # every hour, every minute, every second, and every weekday, using 
+        # a delta of more or less 1 year, 1 month, 1 day, 1 minute and 
+        # 1 second. 
+        delta = timedelta(days=365+31+1, seconds=1+60+60*60) 
+        dt = datetime(1900, 1, 1, 0, 0, 0, 0) 
+        for i in range(200): 
             assert parse(dt.ctime()) == dt
-            dt += delta
-
-    def testIncreasingISOFormat(self):
-        delta = timedelta(days=365+31+1, seconds=1+60+60*60)
-        dt = datetime(1900, 1, 1, 0, 0, 0, 0)
-        for i in range(200):
+            dt += delta 
+ 
+    def testIncreasingISOFormat(self): 
+        delta = timedelta(days=365+31+1, seconds=1+60+60*60) 
+        dt = datetime(1900, 1, 1, 0, 0, 0, 0) 
+        for i in range(200): 
             assert parse(dt.isoformat()) == dt
-            dt += delta
-
-    def testMicrosecondsPrecisionError(self):
-        # Skip found out that sad precision problem. :-(
-        dt1 = parse("00:11:25.01")
-        dt2 = parse("00:12:10.01")
+            dt += delta 
+ 
+    def testMicrosecondsPrecisionError(self): 
+        # Skip found out that sad precision problem. :-( 
+        dt1 = parse("00:11:25.01") 
+        dt2 = parse("00:12:10.01") 
         assert dt1.microsecond == 10000
         assert dt2.microsecond == 10000
-
-    def testMicrosecondPrecisionErrorReturns(self):
-        # One more precision issue, discovered by Eric Brown.  This should
-        # be the last one, as we're no longer using floating points.
-        for ms in [100001, 100000, 99999, 99998,
-                    10001,  10000,  9999,  9998,
-                     1001,   1000,   999,   998,
-                      101,    100,    99,    98]:
-            dt = datetime(2008, 2, 27, 21, 26, 1, ms)
+ 
+    def testMicrosecondPrecisionErrorReturns(self): 
+        # One more precision issue, discovered by Eric Brown.  This should 
+        # be the last one, as we're no longer using floating points. 
+        for ms in [100001, 100000, 99999, 99998, 
+                    10001,  10000,  9999,  9998, 
+                     1001,   1000,   999,   998, 
+                      101,    100,    99,    98]: 
+            dt = datetime(2008, 2, 27, 21, 26, 1, ms) 
             assert parse(dt.isoformat()) == dt
-
-    def testCustomParserInfo(self):
-        # Custom parser info wasn't working, as Michael Elsdörfer discovered.
-        from dateutil.parser import parserinfo, parser
-
-        class myparserinfo(parserinfo):
-            MONTHS = parserinfo.MONTHS[:]
-            MONTHS[0] = ("Foo", "Foo")
-        myparser = parser(myparserinfo())
-        dt = myparser.parse("01/Foo/2007")
+ 
+    def testCustomParserInfo(self): 
+        # Custom parser info wasn't working, as Michael Elsdörfer discovered. 
+        from dateutil.parser import parserinfo, parser 
+ 
+        class myparserinfo(parserinfo): 
+            MONTHS = parserinfo.MONTHS[:] 
+            MONTHS[0] = ("Foo", "Foo") 
+        myparser = parser(myparserinfo()) 
+        dt = myparser.parse("01/Foo/2007") 
         assert dt == datetime(2007, 1, 1)
-
-    def testCustomParserShortDaynames(self):
-        # Horacio Hoyos discovered that day names shorter than 3 characters,
-        # for example two letter German day name abbreviations, don't work:
-        # https://github.com/dateutil/dateutil/issues/343
-        from dateutil.parser import parserinfo, parser
-
-        class GermanParserInfo(parserinfo):
-            WEEKDAYS = [("Mo", "Montag"),
-                        ("Di", "Dienstag"),
-                        ("Mi", "Mittwoch"),
-                        ("Do", "Donnerstag"),
-                        ("Fr", "Freitag"),
-                        ("Sa", "Samstag"),
-                        ("So", "Sonntag")]
-
-        myparser = parser(GermanParserInfo())
-        dt = myparser.parse("Sa 21. Jan 2017")
-        self.assertEqual(dt, datetime(2017, 1, 21))
-
-    def testNoYearFirstNoDayFirst(self):
-        dtstr = '090107'
-
-        # Should be MMDDYY
-        self.assertEqual(parse(dtstr),
-                         datetime(2007, 9, 1))
-
-        self.assertEqual(parse(dtstr, yearfirst=False, dayfirst=False),
-                         datetime(2007, 9, 1))
-
-    def testYearFirst(self):
-        dtstr = '090107'
-
-        # Should be MMDDYY
-        self.assertEqual(parse(dtstr, yearfirst=True),
-                         datetime(2009, 1, 7))
-
-        self.assertEqual(parse(dtstr, yearfirst=True, dayfirst=False),
-                         datetime(2009, 1, 7))
-
-    def testDayFirst(self):
-        dtstr = '090107'
-
-        # Should be DDMMYY
-        self.assertEqual(parse(dtstr, dayfirst=True),
-                         datetime(2007, 1, 9))
-
-        self.assertEqual(parse(dtstr, yearfirst=False, dayfirst=True),
-                         datetime(2007, 1, 9))
-
-    def testDayFirstYearFirst(self):
-        dtstr = '090107'
-        # Should be YYDDMM
-        self.assertEqual(parse(dtstr, yearfirst=True, dayfirst=True),
-                         datetime(2009, 7, 1))
-
-    def testUnambiguousYearFirst(self):
-        dtstr = '2015 09 25'
-        self.assertEqual(parse(dtstr, yearfirst=True),
-                         datetime(2015, 9, 25))
-
-    def testUnambiguousDayFirst(self):
-        dtstr = '2015 09 25'
-        self.assertEqual(parse(dtstr, dayfirst=True),
-                         datetime(2015, 9, 25))
-
-    def testUnambiguousDayFirstYearFirst(self):
-        dtstr = '2015 09 25'
-        self.assertEqual(parse(dtstr, dayfirst=True, yearfirst=True),
-                         datetime(2015, 9, 25))
-
-    def test_mstridx(self):
-        # See GH408
-        dtstr = '2015-15-May'
-        self.assertEqual(parse(dtstr),
-                         datetime(2015, 5, 15))
-
-    def test_idx_check(self):
-        dtstr = '2017-07-17 06:15:'
-        # Pre-PR, the trailing colon will cause an IndexError at 824-825
-        # when checking `i < len_l` and then accessing `l[i+1]`
-        res = parse(dtstr, fuzzy=True)
+ 
+    def testCustomParserShortDaynames(self): 
+        # Horacio Hoyos discovered that day names shorter than 3 characters, 
+        # for example two letter German day name abbreviations, don't work: 
+        # https://github.com/dateutil/dateutil/issues/343 
+        from dateutil.parser import parserinfo, parser 
+ 
+        class GermanParserInfo(parserinfo): 
+            WEEKDAYS = [("Mo", "Montag"), 
+                        ("Di", "Dienstag"), 
+                        ("Mi", "Mittwoch"), 
+                        ("Do", "Donnerstag"), 
+                        ("Fr", "Freitag"), 
+                        ("Sa", "Samstag"), 
+                        ("So", "Sonntag")] 
+ 
+        myparser = parser(GermanParserInfo()) 
+        dt = myparser.parse("Sa 21. Jan 2017") 
+        self.assertEqual(dt, datetime(2017, 1, 21)) 
+ 
+    def testNoYearFirstNoDayFirst(self): 
+        dtstr = '090107' 
+ 
+        # Should be MMDDYY 
+        self.assertEqual(parse(dtstr), 
+                         datetime(2007, 9, 1)) 
+ 
+        self.assertEqual(parse(dtstr, yearfirst=False, dayfirst=False), 
+                         datetime(2007, 9, 1)) 
+ 
+    def testYearFirst(self): 
+        dtstr = '090107' 
+ 
+        # Should be MMDDYY 
+        self.assertEqual(parse(dtstr, yearfirst=True), 
+                         datetime(2009, 1, 7)) 
+ 
+        self.assertEqual(parse(dtstr, yearfirst=True, dayfirst=False), 
+                         datetime(2009, 1, 7)) 
+ 
+    def testDayFirst(self): 
+        dtstr = '090107' 
+ 
+        # Should be DDMMYY 
+        self.assertEqual(parse(dtstr, dayfirst=True), 
+                         datetime(2007, 1, 9)) 
+ 
+        self.assertEqual(parse(dtstr, yearfirst=False, dayfirst=True), 
+                         datetime(2007, 1, 9)) 
+ 
+    def testDayFirstYearFirst(self): 
+        dtstr = '090107' 
+        # Should be YYDDMM 
+        self.assertEqual(parse(dtstr, yearfirst=True, dayfirst=True), 
+                         datetime(2009, 7, 1)) 
+ 
+    def testUnambiguousYearFirst(self): 
+        dtstr = '2015 09 25' 
+        self.assertEqual(parse(dtstr, yearfirst=True), 
+                         datetime(2015, 9, 25)) 
+ 
+    def testUnambiguousDayFirst(self): 
+        dtstr = '2015 09 25' 
+        self.assertEqual(parse(dtstr, dayfirst=True), 
+                         datetime(2015, 9, 25)) 
+ 
+    def testUnambiguousDayFirstYearFirst(self): 
+        dtstr = '2015 09 25' 
+        self.assertEqual(parse(dtstr, dayfirst=True, yearfirst=True), 
+                         datetime(2015, 9, 25)) 
+ 
+    def test_mstridx(self): 
+        # See GH408 
+        dtstr = '2015-15-May' 
+        self.assertEqual(parse(dtstr), 
+                         datetime(2015, 5, 15)) 
+ 
+    def test_idx_check(self): 
+        dtstr = '2017-07-17 06:15:' 
+        # Pre-PR, the trailing colon will cause an IndexError at 824-825 
+        # when checking `i < len_l` and then accessing `l[i+1]` 
+        res = parse(dtstr, fuzzy=True) 
         assert res == datetime(2017, 7, 17, 6, 15)
-
-    def test_hmBY(self):
-        # See GH#483
-        dtstr = '02:17NOV2017'
-        res = parse(dtstr, default=self.default)
+ 
+    def test_hmBY(self): 
+        # See GH#483 
+        dtstr = '02:17NOV2017' 
+        res = parse(dtstr, default=self.default) 
         assert res == datetime(2017, 11, self.default.day, 2, 17)
-
-    def test_validate_hour(self):
-        # See GH353
-        invalid = "201A-01-01T23:58:39.239769+03:00"
+ 
+    def test_validate_hour(self): 
+        # See GH353 
+        invalid = "201A-01-01T23:58:39.239769+03:00" 
         with pytest.raises(ParserError):
-            parse(invalid)
-
-    def test_era_trailing_year(self):
-        dstr = 'AD2001'
-        res = parse(dstr)
-        assert res.year == 2001, res
-
+            parse(invalid) 
+ 
+    def test_era_trailing_year(self): 
+        dstr = 'AD2001' 
+        res = parse(dstr) 
+        assert res.year == 2001, res 
+ 
     def test_includes_timestr(self):
         timestr = "2020-13-97T44:61:83"
-
+ 
         try:
             parse(timestr)
         except ParserError as e:
@@ -769,113 +769,113 @@ class TestOutOfBounds(object):
             parse(dstr, fuzzy=fuzzy)
 
 
-class TestParseUnimplementedCases(object):
-    @pytest.mark.xfail
-    def test_somewhat_ambiguous_string(self):
-        # Ref: github issue #487
-        # The parser is choosing the wrong part for hour
-        # causing datetime to raise an exception.
-        dtstr = '1237 PM BRST Mon Oct 30 2017'
-        res = parse(dtstr, tzinfo=self.tzinfos)
-        assert res == datetime(2017, 10, 30, 12, 37, tzinfo=self.tzinfos)
-
-    @pytest.mark.xfail
-    def test_YmdH_M_S(self):
-        # found in nasdaq's ftp data
-        dstr = '1991041310:19:24'
-        expected = datetime(1991, 4, 13, 10, 19, 24)
-        res = parse(dstr)
-        assert res == expected, (res, expected)
-
-    @pytest.mark.xfail
-    def test_first_century(self):
-        dstr = '0031 Nov 03'
-        expected = datetime(31, 11, 3)
-        res = parse(dstr)
-        assert res == expected, res
-
-    @pytest.mark.xfail
-    def test_era_trailing_year_with_dots(self):
-        dstr = 'A.D.2001'
-        res = parse(dstr)
-        assert res.year == 2001, res
-
-    @pytest.mark.xfail
-    def test_ad_nospace(self):
-        expected = datetime(6, 5, 19)
-        for dstr in [' 6AD May 19', ' 06AD May 19',
-                     ' 006AD May 19', ' 0006AD May 19']:
-            res = parse(dstr)
-            assert res == expected, (dstr, res)
-
-    @pytest.mark.xfail
-    def test_four_letter_day(self):
-        dstr = 'Frid Dec 30, 2016'
-        expected = datetime(2016, 12, 30)
-        res = parse(dstr)
-        assert res == expected
-
-    @pytest.mark.xfail
-    def test_non_date_number(self):
-        dstr = '1,700'
+class TestParseUnimplementedCases(object): 
+    @pytest.mark.xfail 
+    def test_somewhat_ambiguous_string(self): 
+        # Ref: github issue #487 
+        # The parser is choosing the wrong part for hour 
+        # causing datetime to raise an exception. 
+        dtstr = '1237 PM BRST Mon Oct 30 2017' 
+        res = parse(dtstr, tzinfo=self.tzinfos) 
+        assert res == datetime(2017, 10, 30, 12, 37, tzinfo=self.tzinfos) 
+ 
+    @pytest.mark.xfail 
+    def test_YmdH_M_S(self): 
+        # found in nasdaq's ftp data 
+        dstr = '1991041310:19:24' 
+        expected = datetime(1991, 4, 13, 10, 19, 24) 
+        res = parse(dstr) 
+        assert res == expected, (res, expected) 
+ 
+    @pytest.mark.xfail 
+    def test_first_century(self): 
+        dstr = '0031 Nov 03' 
+        expected = datetime(31, 11, 3) 
+        res = parse(dstr) 
+        assert res == expected, res 
+ 
+    @pytest.mark.xfail 
+    def test_era_trailing_year_with_dots(self): 
+        dstr = 'A.D.2001' 
+        res = parse(dstr) 
+        assert res.year == 2001, res 
+ 
+    @pytest.mark.xfail 
+    def test_ad_nospace(self): 
+        expected = datetime(6, 5, 19) 
+        for dstr in [' 6AD May 19', ' 06AD May 19', 
+                     ' 006AD May 19', ' 0006AD May 19']: 
+            res = parse(dstr) 
+            assert res == expected, (dstr, res) 
+ 
+    @pytest.mark.xfail 
+    def test_four_letter_day(self): 
+        dstr = 'Frid Dec 30, 2016' 
+        expected = datetime(2016, 12, 30) 
+        res = parse(dstr) 
+        assert res == expected 
+ 
+    @pytest.mark.xfail 
+    def test_non_date_number(self): 
+        dstr = '1,700' 
         with pytest.raises(ParserError):
-            parse(dstr)
-
-    @pytest.mark.xfail
-    def test_on_era(self):
-        # This could be classified as an "eras" test, but the relevant part
-        # about this is the ` on `
-        dstr = '2:15 PM on January 2nd 1973 A.D.'
-        expected = datetime(1973, 1, 2, 14, 15)
-        res = parse(dstr)
-        assert res == expected
-
-    @pytest.mark.xfail
-    def test_extraneous_year(self):
-        # This was found in the wild at insidertrading.org
-        dstr = "2011 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d NOVEMBER 7, 2012"
-        res = parse(dstr, fuzzy_with_tokens=True)
-        expected = datetime(2012, 11, 7)
-        assert res == expected
-
-    @pytest.mark.xfail
-    def test_extraneous_year_tokens(self):
-        # This was found in the wild at insidertrading.org
-        # Unlike in the case above, identifying the first "2012" as the year
+            parse(dstr) 
+ 
+    @pytest.mark.xfail 
+    def test_on_era(self): 
+        # This could be classified as an "eras" test, but the relevant part 
+        # about this is the ` on ` 
+        dstr = '2:15 PM on January 2nd 1973 A.D.' 
+        expected = datetime(1973, 1, 2, 14, 15) 
+        res = parse(dstr) 
+        assert res == expected 
+ 
+    @pytest.mark.xfail 
+    def test_extraneous_year(self): 
+        # This was found in the wild at insidertrading.org 
+        dstr = "2011 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d NOVEMBER 7, 2012" 
+        res = parse(dstr, fuzzy_with_tokens=True) 
+        expected = datetime(2012, 11, 7) 
+        assert res == expected 
+ 
+    @pytest.mark.xfail 
+    def test_extraneous_year_tokens(self): 
+        # This was found in the wild at insidertrading.org 
+        # Unlike in the case above, identifying the first "2012" as the year 
         # would not be a problem, but inferring that the latter 2012 is hhmm
-        # is a problem.
-        dstr = "2012 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d NOVEMBER 7, 2012"
-        expected = datetime(2012, 11, 7)
-        (res, tokens) = parse(dstr, fuzzy_with_tokens=True)
-        assert res == expected
-        assert tokens == ("2012 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d ",)
-
-    @pytest.mark.xfail
-    def test_extraneous_year2(self):
-        # This was found in the wild at insidertrading.org
-        dstr = ("Berylson Amy Smith 1998 Grantor Retained Annuity Trust "
-                "u/d/t November 2, 1998 f/b/o Jennifer L Berylson")
-        res = parse(dstr, fuzzy_with_tokens=True)
-        expected = datetime(1998, 11, 2)
-        assert res == expected
-
-    @pytest.mark.xfail
-    def test_extraneous_year3(self):
-        # This was found in the wild at insidertrading.org
-        dstr = "SMITH R &  WEISS D 94 CHILD TR FBO M W SMITH UDT 12/1/1994"
-        res = parse(dstr, fuzzy_with_tokens=True)
-        expected = datetime(1994, 12, 1)
-        assert res == expected
-
-    @pytest.mark.xfail
-    def test_unambiguous_YYYYMM(self):
-        # 171206 can be parsed as YYMMDD. However, 201712 cannot be parsed
-        # as instance of YYMMDD and parser could fallback to YYYYMM format.
-        dstr = "201712"
-        res = parse(dstr)
-        expected = datetime(2017, 12, 1)
-        assert res == expected
-
+        # is a problem. 
+        dstr = "2012 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d NOVEMBER 7, 2012" 
+        expected = datetime(2012, 11, 7) 
+        (res, tokens) = parse(dstr, fuzzy_with_tokens=True) 
+        assert res == expected 
+        assert tokens == ("2012 MARTIN CHILDREN'S IRREVOCABLE TRUST u/a/d ",) 
+ 
+    @pytest.mark.xfail 
+    def test_extraneous_year2(self): 
+        # This was found in the wild at insidertrading.org 
+        dstr = ("Berylson Amy Smith 1998 Grantor Retained Annuity Trust " 
+                "u/d/t November 2, 1998 f/b/o Jennifer L Berylson") 
+        res = parse(dstr, fuzzy_with_tokens=True) 
+        expected = datetime(1998, 11, 2) 
+        assert res == expected 
+ 
+    @pytest.mark.xfail 
+    def test_extraneous_year3(self): 
+        # This was found in the wild at insidertrading.org 
+        dstr = "SMITH R &  WEISS D 94 CHILD TR FBO M W SMITH UDT 12/1/1994" 
+        res = parse(dstr, fuzzy_with_tokens=True) 
+        expected = datetime(1994, 12, 1) 
+        assert res == expected 
+ 
+    @pytest.mark.xfail 
+    def test_unambiguous_YYYYMM(self): 
+        # 171206 can be parsed as YYMMDD. However, 201712 cannot be parsed 
+        # as instance of YYMMDD and parser could fallback to YYYYMM format. 
+        dstr = "201712" 
+        res = parse(dstr) 
+        expected = datetime(2017, 12, 1) 
+        assert res == expected 
+ 
     @pytest.mark.xfail
     def test_extraneous_numerical_content(self):
         # ref: https://github.com/dateutil/dateutil/issues/1029
@@ -884,7 +884,7 @@ class TestParseUnimplementedCases(object):
         res = parse(dstr, fuzzy=True, default=datetime(2000, 1, 1))
         expected = datetime(2000, 4, 20)
         assert res == expected
-
+ 
 
 @pytest.mark.skipif(IS_WIN, reason="Windows does not use TZ var")
 class TestTZVar(object):
@@ -894,10 +894,10 @@ class TestTZVar(object):
         with TZEnvContext('EST+5EDT,M3.2.0/2,M11.1.0/2'):
             dt_exp = datetime(2011, 8, 1, 12, 30, tzinfo=tz.tzlocal())
             dt = parse('2011-08-01T12:30 EST')
-
+ 
             assert dt.tzname() == 'EDT'
             assert dt == dt_exp
-
+ 
     def test_tzlocal_in_gmt(self):
         # GH #318
         with TZEnvContext('GMT0BST,M3.5.0,M10.5.0'):
@@ -905,16 +905,16 @@ class TestTZVar(object):
             # parse using the GMT-as-alias-for-UTC rule
             dt = parse('2004-05-01T12:00 GMT')
             dt_exp = datetime(2004, 5, 1, 12, tzinfo=tz.UTC)
-
+ 
             assert dt == dt_exp
-
+ 
     def test_tzlocal_parse_fold(self):
         # One manifestion of GH #318
         with TZEnvContext('EST+5EDT,M3.2.0/2,M11.1.0/2'):
             dt_exp = datetime(2011, 11, 6, 1, 30, tzinfo=tz.tzlocal())
             dt_exp = tz.enfold(dt_exp, fold=1)
             dt = parse('2011-11-06T01:30 EST')
-
+ 
             # Because this is ambiguous, until `tz.tzlocal() is tz.tzlocal()`
             # we'll just check the attributes we care about rather than
             # dt == dt_exp
@@ -922,37 +922,37 @@ class TestTZVar(object):
             assert dt.replace(tzinfo=None) == dt_exp.replace(tzinfo=None)
             assert getattr(dt, 'fold') == getattr(dt_exp, 'fold')
             assert dt.astimezone(tz.UTC) == dt_exp.astimezone(tz.UTC)
-
-
-def test_parse_tzinfos_fold():
-    NYC = tz.gettz('America/New_York')
-    tzinfos = {'EST': NYC, 'EDT': NYC}
-
-    dt_exp = tz.enfold(datetime(2011, 11, 6, 1, 30, tzinfo=NYC), fold=1)
-    dt = parse('2011-11-06T01:30 EST', tzinfos=tzinfos)
-
-    assert dt == dt_exp
-    assert dt.tzinfo is dt_exp.tzinfo
-    assert getattr(dt, 'fold') == getattr(dt_exp, 'fold')
+ 
+ 
+def test_parse_tzinfos_fold(): 
+    NYC = tz.gettz('America/New_York') 
+    tzinfos = {'EST': NYC, 'EDT': NYC} 
+ 
+    dt_exp = tz.enfold(datetime(2011, 11, 6, 1, 30, tzinfo=NYC), fold=1) 
+    dt = parse('2011-11-06T01:30 EST', tzinfos=tzinfos) 
+ 
+    assert dt == dt_exp 
+    assert dt.tzinfo is dt_exp.tzinfo 
+    assert getattr(dt, 'fold') == getattr(dt_exp, 'fold') 
     assert dt.astimezone(tz.UTC) == dt_exp.astimezone(tz.UTC)
-
-
-@pytest.mark.parametrize('dtstr,dt', [
-    ('5.6h', datetime(2003, 9, 25, 5, 36)),
-    ('5.6m', datetime(2003, 9, 25, 0, 5, 36)),
-    # '5.6s' never had a rounding problem, test added for completeness
-    ('5.6s', datetime(2003, 9, 25, 0, 0, 5, 600000))
-])
-def test_rounding_floatlike_strings(dtstr, dt):
-    assert parse(dtstr, default=datetime(2003, 9, 25)) == dt
-
-
-@pytest.mark.parametrize('value', ['1: test', 'Nan'])
-def test_decimal_error(value):
+ 
+ 
+@pytest.mark.parametrize('dtstr,dt', [ 
+    ('5.6h', datetime(2003, 9, 25, 5, 36)), 
+    ('5.6m', datetime(2003, 9, 25, 0, 5, 36)), 
+    # '5.6s' never had a rounding problem, test added for completeness 
+    ('5.6s', datetime(2003, 9, 25, 0, 0, 5, 600000)) 
+]) 
+def test_rounding_floatlike_strings(dtstr, dt): 
+    assert parse(dtstr, default=datetime(2003, 9, 25)) == dt 
+ 
+ 
+@pytest.mark.parametrize('value', ['1: test', 'Nan']) 
+def test_decimal_error(value): 
     # GH 632, GH 662 - decimal.Decimal raises some non-ParserError exception
     # when constructed with an invalid value
     with pytest.raises(ParserError):
-        parse(value)
+        parse(value) 
 
 def test_parsererror_repr():
     # GH 991 — the __repr__ was not properly indented and so was never defined.
diff --git a/contrib/python/dateutil/dateutil/test/test_relativedelta.py b/contrib/python/dateutil/dateutil/test/test_relativedelta.py
index 1e5d170449..0fecdd7823 100644
--- a/contrib/python/dateutil/dateutil/test/test_relativedelta.py
+++ b/contrib/python/dateutil/dateutil/test/test_relativedelta.py
@@ -1,124 +1,124 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
 from ._common import NotAValue
-
-import calendar
-from datetime import datetime, date, timedelta
-import unittest
-
+ 
+import calendar 
+from datetime import datetime, date, timedelta 
+import unittest 
+ 
 import pytest
 
-from dateutil.relativedelta import relativedelta, MO, TU, WE, FR, SU
-
-
+from dateutil.relativedelta import relativedelta, MO, TU, WE, FR, SU 
+ 
+ 
 class RelativeDeltaTest(unittest.TestCase):
-    now = datetime(2003, 9, 17, 20, 54, 47, 282310)
-    today = date(2003, 9, 17)
-
-    def testInheritance(self):
-        # Ensure that relativedelta is inheritance-friendly.
-        class rdChildClass(relativedelta):
-            pass
-
-        ccRD = rdChildClass(years=1, months=1, days=1, leapdays=1, weeks=1,
-                            hours=1, minutes=1, seconds=1, microseconds=1)
-
-        rd = relativedelta(years=1, months=1, days=1, leapdays=1, weeks=1,
-                           hours=1, minutes=1, seconds=1, microseconds=1)
-
-        self.assertEqual(type(ccRD + rd), type(ccRD),
-                         msg='Addition does not inherit type.')
-
-        self.assertEqual(type(ccRD - rd), type(ccRD),
-                         msg='Subtraction does not inherit type.')
-
-        self.assertEqual(type(-ccRD), type(ccRD),
-                         msg='Negation does not inherit type.')
-
-        self.assertEqual(type(ccRD * 5.0), type(ccRD),
-                         msg='Multiplication does not inherit type.')
-
-        self.assertEqual(type(ccRD / 5.0), type(ccRD),
-                         msg='Division does not inherit type.')
-
-    def testMonthEndMonthBeginning(self):
-        self.assertEqual(relativedelta(datetime(2003, 1, 31, 23, 59, 59),
-                                       datetime(2003, 3, 1, 0, 0, 0)),
-                         relativedelta(months=-1, seconds=-1))
-
-        self.assertEqual(relativedelta(datetime(2003, 3, 1, 0, 0, 0),
-                                       datetime(2003, 1, 31, 23, 59, 59)),
-                         relativedelta(months=1, seconds=1))
-
-    def testMonthEndMonthBeginningLeapYear(self):
-        self.assertEqual(relativedelta(datetime(2012, 1, 31, 23, 59, 59),
-                                       datetime(2012, 3, 1, 0, 0, 0)),
-                         relativedelta(months=-1, seconds=-1))
-
-        self.assertEqual(relativedelta(datetime(2003, 3, 1, 0, 0, 0),
-                                       datetime(2003, 1, 31, 23, 59, 59)),
-                         relativedelta(months=1, seconds=1))
-
-    def testNextMonth(self):
-        self.assertEqual(self.now+relativedelta(months=+1),
-                         datetime(2003, 10, 17, 20, 54, 47, 282310))
-
-    def testNextMonthPlusOneWeek(self):
-        self.assertEqual(self.now+relativedelta(months=+1, weeks=+1),
-                         datetime(2003, 10, 24, 20, 54, 47, 282310))
-
-    def testNextMonthPlusOneWeek10am(self):
-        self.assertEqual(self.today +
-                         relativedelta(months=+1, weeks=+1, hour=10),
-                         datetime(2003, 10, 24, 10, 0))
-
-    def testNextMonthPlusOneWeek10amDiff(self):
-        self.assertEqual(relativedelta(datetime(2003, 10, 24, 10, 0),
-                                       self.today),
-                         relativedelta(months=+1, days=+7, hours=+10))
-
-    def testOneMonthBeforeOneYear(self):
-        self.assertEqual(self.now+relativedelta(years=+1, months=-1),
-                         datetime(2004, 8, 17, 20, 54, 47, 282310))
-
-    def testMonthsOfDiffNumOfDays(self):
-        self.assertEqual(date(2003, 1, 27)+relativedelta(months=+1),
-                         date(2003, 2, 27))
-        self.assertEqual(date(2003, 1, 31)+relativedelta(months=+1),
-                         date(2003, 2, 28))
-        self.assertEqual(date(2003, 1, 31)+relativedelta(months=+2),
-                         date(2003, 3, 31))
-
-    def testMonthsOfDiffNumOfDaysWithYears(self):
-        self.assertEqual(date(2000, 2, 28)+relativedelta(years=+1),
-                         date(2001, 2, 28))
-        self.assertEqual(date(2000, 2, 29)+relativedelta(years=+1),
-                         date(2001, 2, 28))
-
-        self.assertEqual(date(1999, 2, 28)+relativedelta(years=+1),
-                         date(2000, 2, 28))
-        self.assertEqual(date(1999, 3, 1)+relativedelta(years=+1),
-                         date(2000, 3, 1))
-        self.assertEqual(date(1999, 3, 1)+relativedelta(years=+1),
-                         date(2000, 3, 1))
-
-        self.assertEqual(date(2001, 2, 28)+relativedelta(years=-1),
-                         date(2000, 2, 28))
-        self.assertEqual(date(2001, 3, 1)+relativedelta(years=-1),
-                         date(2000, 3, 1))
-
-    def testNextFriday(self):
-        self.assertEqual(self.today+relativedelta(weekday=FR),
-                         date(2003, 9, 19))
-
-    def testNextFridayInt(self):
-        self.assertEqual(self.today+relativedelta(weekday=calendar.FRIDAY),
-                         date(2003, 9, 19))
-
-    def testLastFridayInThisMonth(self):
-        self.assertEqual(self.today+relativedelta(day=31, weekday=FR(-1)),
-                         date(2003, 9, 26))
-
+    now = datetime(2003, 9, 17, 20, 54, 47, 282310) 
+    today = date(2003, 9, 17) 
+ 
+    def testInheritance(self): 
+        # Ensure that relativedelta is inheritance-friendly. 
+        class rdChildClass(relativedelta): 
+            pass 
+ 
+        ccRD = rdChildClass(years=1, months=1, days=1, leapdays=1, weeks=1, 
+                            hours=1, minutes=1, seconds=1, microseconds=1) 
+ 
+        rd = relativedelta(years=1, months=1, days=1, leapdays=1, weeks=1, 
+                           hours=1, minutes=1, seconds=1, microseconds=1) 
+ 
+        self.assertEqual(type(ccRD + rd), type(ccRD), 
+                         msg='Addition does not inherit type.') 
+ 
+        self.assertEqual(type(ccRD - rd), type(ccRD), 
+                         msg='Subtraction does not inherit type.') 
+ 
+        self.assertEqual(type(-ccRD), type(ccRD), 
+                         msg='Negation does not inherit type.') 
+ 
+        self.assertEqual(type(ccRD * 5.0), type(ccRD), 
+                         msg='Multiplication does not inherit type.') 
+ 
+        self.assertEqual(type(ccRD / 5.0), type(ccRD), 
+                         msg='Division does not inherit type.') 
+ 
+    def testMonthEndMonthBeginning(self): 
+        self.assertEqual(relativedelta(datetime(2003, 1, 31, 23, 59, 59), 
+                                       datetime(2003, 3, 1, 0, 0, 0)), 
+                         relativedelta(months=-1, seconds=-1)) 
+ 
+        self.assertEqual(relativedelta(datetime(2003, 3, 1, 0, 0, 0), 
+                                       datetime(2003, 1, 31, 23, 59, 59)), 
+                         relativedelta(months=1, seconds=1)) 
+ 
+    def testMonthEndMonthBeginningLeapYear(self): 
+        self.assertEqual(relativedelta(datetime(2012, 1, 31, 23, 59, 59), 
+                                       datetime(2012, 3, 1, 0, 0, 0)), 
+                         relativedelta(months=-1, seconds=-1)) 
+ 
+        self.assertEqual(relativedelta(datetime(2003, 3, 1, 0, 0, 0), 
+                                       datetime(2003, 1, 31, 23, 59, 59)), 
+                         relativedelta(months=1, seconds=1)) 
+ 
+    def testNextMonth(self): 
+        self.assertEqual(self.now+relativedelta(months=+1), 
+                         datetime(2003, 10, 17, 20, 54, 47, 282310)) 
+ 
+    def testNextMonthPlusOneWeek(self): 
+        self.assertEqual(self.now+relativedelta(months=+1, weeks=+1), 
+                         datetime(2003, 10, 24, 20, 54, 47, 282310)) 
+ 
+    def testNextMonthPlusOneWeek10am(self): 
+        self.assertEqual(self.today + 
+                         relativedelta(months=+1, weeks=+1, hour=10), 
+                         datetime(2003, 10, 24, 10, 0)) 
+ 
+    def testNextMonthPlusOneWeek10amDiff(self): 
+        self.assertEqual(relativedelta(datetime(2003, 10, 24, 10, 0), 
+                                       self.today), 
+                         relativedelta(months=+1, days=+7, hours=+10)) 
+ 
+    def testOneMonthBeforeOneYear(self): 
+        self.assertEqual(self.now+relativedelta(years=+1, months=-1), 
+                         datetime(2004, 8, 17, 20, 54, 47, 282310)) 
+ 
+    def testMonthsOfDiffNumOfDays(self): 
+        self.assertEqual(date(2003, 1, 27)+relativedelta(months=+1), 
+                         date(2003, 2, 27)) 
+        self.assertEqual(date(2003, 1, 31)+relativedelta(months=+1), 
+                         date(2003, 2, 28)) 
+        self.assertEqual(date(2003, 1, 31)+relativedelta(months=+2), 
+                         date(2003, 3, 31)) 
+ 
+    def testMonthsOfDiffNumOfDaysWithYears(self): 
+        self.assertEqual(date(2000, 2, 28)+relativedelta(years=+1), 
+                         date(2001, 2, 28)) 
+        self.assertEqual(date(2000, 2, 29)+relativedelta(years=+1), 
+                         date(2001, 2, 28)) 
+ 
+        self.assertEqual(date(1999, 2, 28)+relativedelta(years=+1), 
+                         date(2000, 2, 28)) 
+        self.assertEqual(date(1999, 3, 1)+relativedelta(years=+1), 
+                         date(2000, 3, 1)) 
+        self.assertEqual(date(1999, 3, 1)+relativedelta(years=+1), 
+                         date(2000, 3, 1)) 
+ 
+        self.assertEqual(date(2001, 2, 28)+relativedelta(years=-1), 
+                         date(2000, 2, 28)) 
+        self.assertEqual(date(2001, 3, 1)+relativedelta(years=-1), 
+                         date(2000, 3, 1)) 
+ 
+    def testNextFriday(self): 
+        self.assertEqual(self.today+relativedelta(weekday=FR), 
+                         date(2003, 9, 19)) 
+ 
+    def testNextFridayInt(self): 
+        self.assertEqual(self.today+relativedelta(weekday=calendar.FRIDAY), 
+                         date(2003, 9, 19)) 
+ 
+    def testLastFridayInThisMonth(self): 
+        self.assertEqual(self.today+relativedelta(day=31, weekday=FR(-1)), 
+                         date(2003, 9, 26)) 
+ 
     def testLastDayOfFebruary(self):
         self.assertEqual(date(2021, 2, 1) + relativedelta(day=31),
                          date(2021, 2, 28))
@@ -127,14 +127,14 @@ class RelativeDeltaTest(unittest.TestCase):
         self.assertEqual(date(2020, 2, 1) + relativedelta(day=31),
                          date(2020, 2, 29))
 
-    def testNextWednesdayIsToday(self):
-        self.assertEqual(self.today+relativedelta(weekday=WE),
-                         date(2003, 9, 17))
-
+    def testNextWednesdayIsToday(self): 
+        self.assertEqual(self.today+relativedelta(weekday=WE), 
+                         date(2003, 9, 17)) 
+ 
     def testNextWednesdayNotToday(self):
-        self.assertEqual(self.today+relativedelta(days=+1, weekday=WE),
-                         date(2003, 9, 24))
-
+        self.assertEqual(self.today+relativedelta(days=+1, weekday=WE), 
+                         date(2003, 9, 24)) 
+ 
     def testAddMoreThan12Months(self):
         self.assertEqual(date(2003, 12, 1) + relativedelta(months=+13),
                          date(2005, 1, 1))
@@ -143,231 +143,231 @@ class RelativeDeltaTest(unittest.TestCase):
         self.assertEqual(date(2003, 1, 1) + relativedelta(months=-2),
                          date(2002, 11, 1))
 
-    def test15thISOYearWeek(self):
-        self.assertEqual(date(2003, 1, 1) +
-                         relativedelta(day=4, weeks=+14, weekday=MO(-1)),
-                         date(2003, 4, 7))
-
-    def testMillenniumAge(self):
-        self.assertEqual(relativedelta(self.now, date(2001, 1, 1)),
-                         relativedelta(years=+2, months=+8, days=+16,
-                                       hours=+20, minutes=+54, seconds=+47,
-                                       microseconds=+282310))
-
-    def testJohnAge(self):
-        self.assertEqual(relativedelta(self.now,
-                                       datetime(1978, 4, 5, 12, 0)),
-                         relativedelta(years=+25, months=+5, days=+12,
-                                       hours=+8, minutes=+54, seconds=+47,
-                                       microseconds=+282310))
-
-    def testJohnAgeWithDate(self):
-        self.assertEqual(relativedelta(self.today,
-                                       datetime(1978, 4, 5, 12, 0)),
-                         relativedelta(years=+25, months=+5, days=+11,
-                                       hours=+12))
-
-    def testYearDay(self):
-        self.assertEqual(date(2003, 1, 1)+relativedelta(yearday=260),
-                         date(2003, 9, 17))
-        self.assertEqual(date(2002, 1, 1)+relativedelta(yearday=260),
-                         date(2002, 9, 17))
-        self.assertEqual(date(2000, 1, 1)+relativedelta(yearday=260),
-                         date(2000, 9, 16))
-        self.assertEqual(self.today+relativedelta(yearday=261),
-                         date(2003, 9, 18))
-
-    def testYearDayBug(self):
-        # Tests a problem reported by Adam Ryan.
-        self.assertEqual(date(2010, 1, 1)+relativedelta(yearday=15),
-                         date(2010, 1, 15))
-
-    def testNonLeapYearDay(self):
-        self.assertEqual(date(2003, 1, 1)+relativedelta(nlyearday=260),
-                         date(2003, 9, 17))
-        self.assertEqual(date(2002, 1, 1)+relativedelta(nlyearday=260),
-                         date(2002, 9, 17))
-        self.assertEqual(date(2000, 1, 1)+relativedelta(nlyearday=260),
-                         date(2000, 9, 17))
-        self.assertEqual(self.today+relativedelta(yearday=261),
-                         date(2003, 9, 18))
-
-    def testAddition(self):
-        self.assertEqual(relativedelta(days=10) +
-                         relativedelta(years=1, months=2, days=3, hours=4,
-                                       minutes=5, microseconds=6),
-                         relativedelta(years=1, months=2, days=13, hours=4,
-                                       minutes=5, microseconds=6))
-
-    def testAbsoluteAddition(self):
-        self.assertEqual(relativedelta() + relativedelta(day=0, hour=0),
-                         relativedelta(day=0, hour=0))
-        self.assertEqual(relativedelta(day=0, hour=0) + relativedelta(),
-                         relativedelta(day=0, hour=0))
-
-    def testAdditionToDatetime(self):
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=1),
-                         datetime(2000, 1, 2))
-
-    def testRightAdditionToDatetime(self):
-        self.assertEqual(relativedelta(days=1) + datetime(2000, 1, 1),
-                         datetime(2000, 1, 2))
-
-    def testAdditionInvalidType(self):
-        with self.assertRaises(TypeError):
-            relativedelta(days=3) + 9
-
-    def testAdditionUnsupportedType(self):
-        # For unsupported types that define their own comparators, etc.
-        self.assertIs(relativedelta(days=1) + NotAValue, NotAValue)
-
-    def testAdditionFloatValue(self):
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=float(1)),
-                         datetime(2000, 1, 2))
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(months=float(1)),
-                         datetime(2000, 2, 1))
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(years=float(1)),
-                         datetime(2001, 1, 1))
-
-    def testAdditionFloatFractionals(self):
-        self.assertEqual(datetime(2000, 1, 1, 0) +
-                         relativedelta(days=float(0.5)),
-                         datetime(2000, 1, 1, 12))
-        self.assertEqual(datetime(2000, 1, 1, 0, 0) +
-                         relativedelta(hours=float(0.5)),
-                         datetime(2000, 1, 1, 0, 30))
-        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0) +
-                         relativedelta(minutes=float(0.5)),
-                         datetime(2000, 1, 1, 0, 0, 30))
-        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0, 0) +
-                         relativedelta(seconds=float(0.5)),
-                         datetime(2000, 1, 1, 0, 0, 0, 500000))
-        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0, 0) +
-                         relativedelta(microseconds=float(500000.25)),
-                         datetime(2000, 1, 1, 0, 0, 0, 500000))
-
-    def testSubtraction(self):
-        self.assertEqual(relativedelta(days=10) -
-                         relativedelta(years=1, months=2, days=3, hours=4,
-                                       minutes=5, microseconds=6),
-                         relativedelta(years=-1, months=-2, days=7, hours=-4,
-                                       minutes=-5, microseconds=-6))
-
-    def testRightSubtractionFromDatetime(self):
-        self.assertEqual(datetime(2000, 1, 2) - relativedelta(days=1),
-                         datetime(2000, 1, 1))
-
-    def testSubractionWithDatetime(self):
-        self.assertRaises(TypeError, lambda x, y: x - y,
-                          (relativedelta(days=1), datetime(2000, 1, 1)))
-
-    def testSubtractionInvalidType(self):
-        with self.assertRaises(TypeError):
-            relativedelta(hours=12) - 14
-
-    def testSubtractionUnsupportedType(self):
-        self.assertIs(relativedelta(days=1) + NotAValue, NotAValue)
-
-    def testMultiplication(self):
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=1) * 28,
-                         datetime(2000, 1, 29))
-        self.assertEqual(datetime(2000, 1, 1) + 28 * relativedelta(days=1),
-                         datetime(2000, 1, 29))
-
-    def testMultiplicationUnsupportedType(self):
-        self.assertIs(relativedelta(days=1) * NotAValue, NotAValue)
-
-    def testDivision(self):
-        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=28) / 28,
-                         datetime(2000, 1, 2))
-
-    def testDivisionUnsupportedType(self):
-        self.assertIs(relativedelta(days=1) / NotAValue, NotAValue)
-
-    def testBoolean(self):
-        self.assertFalse(relativedelta(days=0))
-        self.assertTrue(relativedelta(days=1))
-
-    def testAbsoluteValueNegative(self):
-        rd_base = relativedelta(years=-1, months=-5, days=-2, hours=-3,
-                                minutes=-5, seconds=-2, microseconds=-12)
-        rd_expected = relativedelta(years=1, months=5, days=2, hours=3,
-                                    minutes=5, seconds=2, microseconds=12)
-        self.assertEqual(abs(rd_base), rd_expected)
-
-    def testAbsoluteValuePositive(self):
-        rd_base = relativedelta(years=1, months=5, days=2, hours=3,
-                                minutes=5, seconds=2, microseconds=12)
-        rd_expected = rd_base
-
-        self.assertEqual(abs(rd_base), rd_expected)
-
-    def testComparison(self):
-        d1 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1,
-                           minutes=1, seconds=1, microseconds=1)
-        d2 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1,
-                           minutes=1, seconds=1, microseconds=1)
-        d3 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1,
-                           minutes=1, seconds=1, microseconds=2)
-
-        self.assertEqual(d1, d2)
-        self.assertNotEqual(d1, d3)
-
-    def testInequalityTypeMismatch(self):
-        # Different type
-        self.assertFalse(relativedelta(year=1) == 19)
-
-    def testInequalityUnsupportedType(self):
-        self.assertIs(relativedelta(hours=3) == NotAValue, NotAValue)
-
-    def testInequalityWeekdays(self):
-        # Different weekdays
-        no_wday = relativedelta(year=1997, month=4)
-        wday_mo_1 = relativedelta(year=1997, month=4, weekday=MO(+1))
-        wday_mo_2 = relativedelta(year=1997, month=4, weekday=MO(+2))
-        wday_tu = relativedelta(year=1997, month=4, weekday=TU)
-
-        self.assertTrue(wday_mo_1 == wday_mo_1)
-
-        self.assertFalse(no_wday == wday_mo_1)
-        self.assertFalse(wday_mo_1 == no_wday)
-
-        self.assertFalse(wday_mo_1 == wday_mo_2)
-        self.assertFalse(wday_mo_2 == wday_mo_1)
-
-        self.assertFalse(wday_mo_1 == wday_tu)
-        self.assertFalse(wday_tu == wday_mo_1)
-
-    def testMonthOverflow(self):
-        self.assertEqual(relativedelta(months=273),
-                         relativedelta(years=22, months=9))
-
-    def testWeeks(self):
-        # Test that the weeks property is working properly.
-        rd = relativedelta(years=4, months=2, weeks=8, days=6)
-        self.assertEqual((rd.weeks, rd.days), (8, 8 * 7 + 6))
-
-        rd.weeks = 3
-        self.assertEqual((rd.weeks, rd.days), (3, 3 * 7 + 6))
-
-    def testRelativeDeltaRepr(self):
-        self.assertEqual(repr(relativedelta(years=1, months=-1, days=15)),
-                         'relativedelta(years=+1, months=-1, days=+15)')
-
-        self.assertEqual(repr(relativedelta(months=14, seconds=-25)),
-                         'relativedelta(years=+1, months=+2, seconds=-25)')
-
-        self.assertEqual(repr(relativedelta(month=3, hour=3, weekday=SU(3))),
-                         'relativedelta(month=3, weekday=SU(+3), hour=3)')
-
-    def testRelativeDeltaFractionalYear(self):
-        with self.assertRaises(ValueError):
-            relativedelta(years=1.5)
-
-    def testRelativeDeltaFractionalMonth(self):
-        with self.assertRaises(ValueError):
-            relativedelta(months=1.5)
-
+    def test15thISOYearWeek(self): 
+        self.assertEqual(date(2003, 1, 1) + 
+                         relativedelta(day=4, weeks=+14, weekday=MO(-1)), 
+                         date(2003, 4, 7)) 
+ 
+    def testMillenniumAge(self): 
+        self.assertEqual(relativedelta(self.now, date(2001, 1, 1)), 
+                         relativedelta(years=+2, months=+8, days=+16, 
+                                       hours=+20, minutes=+54, seconds=+47, 
+                                       microseconds=+282310)) 
+ 
+    def testJohnAge(self): 
+        self.assertEqual(relativedelta(self.now, 
+                                       datetime(1978, 4, 5, 12, 0)), 
+                         relativedelta(years=+25, months=+5, days=+12, 
+                                       hours=+8, minutes=+54, seconds=+47, 
+                                       microseconds=+282310)) 
+ 
+    def testJohnAgeWithDate(self): 
+        self.assertEqual(relativedelta(self.today, 
+                                       datetime(1978, 4, 5, 12, 0)), 
+                         relativedelta(years=+25, months=+5, days=+11, 
+                                       hours=+12)) 
+ 
+    def testYearDay(self): 
+        self.assertEqual(date(2003, 1, 1)+relativedelta(yearday=260), 
+                         date(2003, 9, 17)) 
+        self.assertEqual(date(2002, 1, 1)+relativedelta(yearday=260), 
+                         date(2002, 9, 17)) 
+        self.assertEqual(date(2000, 1, 1)+relativedelta(yearday=260), 
+                         date(2000, 9, 16)) 
+        self.assertEqual(self.today+relativedelta(yearday=261), 
+                         date(2003, 9, 18)) 
+ 
+    def testYearDayBug(self): 
+        # Tests a problem reported by Adam Ryan. 
+        self.assertEqual(date(2010, 1, 1)+relativedelta(yearday=15), 
+                         date(2010, 1, 15)) 
+ 
+    def testNonLeapYearDay(self): 
+        self.assertEqual(date(2003, 1, 1)+relativedelta(nlyearday=260), 
+                         date(2003, 9, 17)) 
+        self.assertEqual(date(2002, 1, 1)+relativedelta(nlyearday=260), 
+                         date(2002, 9, 17)) 
+        self.assertEqual(date(2000, 1, 1)+relativedelta(nlyearday=260), 
+                         date(2000, 9, 17)) 
+        self.assertEqual(self.today+relativedelta(yearday=261), 
+                         date(2003, 9, 18)) 
+ 
+    def testAddition(self): 
+        self.assertEqual(relativedelta(days=10) + 
+                         relativedelta(years=1, months=2, days=3, hours=4, 
+                                       minutes=5, microseconds=6), 
+                         relativedelta(years=1, months=2, days=13, hours=4, 
+                                       minutes=5, microseconds=6)) 
+ 
+    def testAbsoluteAddition(self): 
+        self.assertEqual(relativedelta() + relativedelta(day=0, hour=0), 
+                         relativedelta(day=0, hour=0)) 
+        self.assertEqual(relativedelta(day=0, hour=0) + relativedelta(), 
+                         relativedelta(day=0, hour=0)) 
+ 
+    def testAdditionToDatetime(self): 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=1), 
+                         datetime(2000, 1, 2)) 
+ 
+    def testRightAdditionToDatetime(self): 
+        self.assertEqual(relativedelta(days=1) + datetime(2000, 1, 1), 
+                         datetime(2000, 1, 2)) 
+ 
+    def testAdditionInvalidType(self): 
+        with self.assertRaises(TypeError): 
+            relativedelta(days=3) + 9 
+ 
+    def testAdditionUnsupportedType(self): 
+        # For unsupported types that define their own comparators, etc. 
+        self.assertIs(relativedelta(days=1) + NotAValue, NotAValue) 
+ 
+    def testAdditionFloatValue(self): 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=float(1)), 
+                         datetime(2000, 1, 2)) 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(months=float(1)), 
+                         datetime(2000, 2, 1)) 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(years=float(1)), 
+                         datetime(2001, 1, 1)) 
+ 
+    def testAdditionFloatFractionals(self): 
+        self.assertEqual(datetime(2000, 1, 1, 0) + 
+                         relativedelta(days=float(0.5)), 
+                         datetime(2000, 1, 1, 12)) 
+        self.assertEqual(datetime(2000, 1, 1, 0, 0) + 
+                         relativedelta(hours=float(0.5)), 
+                         datetime(2000, 1, 1, 0, 30)) 
+        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0) + 
+                         relativedelta(minutes=float(0.5)), 
+                         datetime(2000, 1, 1, 0, 0, 30)) 
+        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0, 0) + 
+                         relativedelta(seconds=float(0.5)), 
+                         datetime(2000, 1, 1, 0, 0, 0, 500000)) 
+        self.assertEqual(datetime(2000, 1, 1, 0, 0, 0, 0) + 
+                         relativedelta(microseconds=float(500000.25)), 
+                         datetime(2000, 1, 1, 0, 0, 0, 500000)) 
+ 
+    def testSubtraction(self): 
+        self.assertEqual(relativedelta(days=10) - 
+                         relativedelta(years=1, months=2, days=3, hours=4, 
+                                       minutes=5, microseconds=6), 
+                         relativedelta(years=-1, months=-2, days=7, hours=-4, 
+                                       minutes=-5, microseconds=-6)) 
+ 
+    def testRightSubtractionFromDatetime(self): 
+        self.assertEqual(datetime(2000, 1, 2) - relativedelta(days=1), 
+                         datetime(2000, 1, 1)) 
+ 
+    def testSubractionWithDatetime(self): 
+        self.assertRaises(TypeError, lambda x, y: x - y, 
+                          (relativedelta(days=1), datetime(2000, 1, 1))) 
+ 
+    def testSubtractionInvalidType(self): 
+        with self.assertRaises(TypeError): 
+            relativedelta(hours=12) - 14 
+ 
+    def testSubtractionUnsupportedType(self): 
+        self.assertIs(relativedelta(days=1) + NotAValue, NotAValue) 
+ 
+    def testMultiplication(self): 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=1) * 28, 
+                         datetime(2000, 1, 29)) 
+        self.assertEqual(datetime(2000, 1, 1) + 28 * relativedelta(days=1), 
+                         datetime(2000, 1, 29)) 
+ 
+    def testMultiplicationUnsupportedType(self): 
+        self.assertIs(relativedelta(days=1) * NotAValue, NotAValue) 
+ 
+    def testDivision(self): 
+        self.assertEqual(datetime(2000, 1, 1) + relativedelta(days=28) / 28, 
+                         datetime(2000, 1, 2)) 
+ 
+    def testDivisionUnsupportedType(self): 
+        self.assertIs(relativedelta(days=1) / NotAValue, NotAValue) 
+ 
+    def testBoolean(self): 
+        self.assertFalse(relativedelta(days=0)) 
+        self.assertTrue(relativedelta(days=1)) 
+ 
+    def testAbsoluteValueNegative(self): 
+        rd_base = relativedelta(years=-1, months=-5, days=-2, hours=-3, 
+                                minutes=-5, seconds=-2, microseconds=-12) 
+        rd_expected = relativedelta(years=1, months=5, days=2, hours=3, 
+                                    minutes=5, seconds=2, microseconds=12) 
+        self.assertEqual(abs(rd_base), rd_expected) 
+ 
+    def testAbsoluteValuePositive(self): 
+        rd_base = relativedelta(years=1, months=5, days=2, hours=3, 
+                                minutes=5, seconds=2, microseconds=12) 
+        rd_expected = rd_base 
+ 
+        self.assertEqual(abs(rd_base), rd_expected) 
+ 
+    def testComparison(self): 
+        d1 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=1) 
+        d2 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=1) 
+        d3 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=2) 
+ 
+        self.assertEqual(d1, d2) 
+        self.assertNotEqual(d1, d3) 
+ 
+    def testInequalityTypeMismatch(self): 
+        # Different type 
+        self.assertFalse(relativedelta(year=1) == 19) 
+ 
+    def testInequalityUnsupportedType(self): 
+        self.assertIs(relativedelta(hours=3) == NotAValue, NotAValue) 
+ 
+    def testInequalityWeekdays(self): 
+        # Different weekdays 
+        no_wday = relativedelta(year=1997, month=4) 
+        wday_mo_1 = relativedelta(year=1997, month=4, weekday=MO(+1)) 
+        wday_mo_2 = relativedelta(year=1997, month=4, weekday=MO(+2)) 
+        wday_tu = relativedelta(year=1997, month=4, weekday=TU) 
+ 
+        self.assertTrue(wday_mo_1 == wday_mo_1) 
+ 
+        self.assertFalse(no_wday == wday_mo_1) 
+        self.assertFalse(wday_mo_1 == no_wday) 
+ 
+        self.assertFalse(wday_mo_1 == wday_mo_2) 
+        self.assertFalse(wday_mo_2 == wday_mo_1) 
+ 
+        self.assertFalse(wday_mo_1 == wday_tu) 
+        self.assertFalse(wday_tu == wday_mo_1) 
+ 
+    def testMonthOverflow(self): 
+        self.assertEqual(relativedelta(months=273), 
+                         relativedelta(years=22, months=9)) 
+ 
+    def testWeeks(self): 
+        # Test that the weeks property is working properly. 
+        rd = relativedelta(years=4, months=2, weeks=8, days=6) 
+        self.assertEqual((rd.weeks, rd.days), (8, 8 * 7 + 6)) 
+ 
+        rd.weeks = 3 
+        self.assertEqual((rd.weeks, rd.days), (3, 3 * 7 + 6)) 
+ 
+    def testRelativeDeltaRepr(self): 
+        self.assertEqual(repr(relativedelta(years=1, months=-1, days=15)), 
+                         'relativedelta(years=+1, months=-1, days=+15)') 
+ 
+        self.assertEqual(repr(relativedelta(months=14, seconds=-25)), 
+                         'relativedelta(years=+1, months=+2, seconds=-25)') 
+ 
+        self.assertEqual(repr(relativedelta(month=3, hour=3, weekday=SU(3))), 
+                         'relativedelta(month=3, weekday=SU(+3), hour=3)') 
+ 
+    def testRelativeDeltaFractionalYear(self): 
+        with self.assertRaises(ValueError): 
+            relativedelta(years=1.5) 
+ 
+    def testRelativeDeltaFractionalMonth(self): 
+        with self.assertRaises(ValueError): 
+            relativedelta(months=1.5) 
+ 
     def testRelativeDeltaInvalidDatetimeObject(self):
         with self.assertRaises(TypeError):
             relativedelta(dt1='2018-01-01', dt2='2018-01-02')
@@ -378,329 +378,329 @@ class RelativeDeltaTest(unittest.TestCase):
         with self.assertRaises(TypeError):
             relativedelta(dt1='2018-01-01', dt2=datetime(2018, 1, 2))
 
-    def testRelativeDeltaFractionalAbsolutes(self):
-        # Fractional absolute values will soon be unsupported,
-        # check for the deprecation warning.
+    def testRelativeDeltaFractionalAbsolutes(self): 
+        # Fractional absolute values will soon be unsupported, 
+        # check for the deprecation warning. 
         with pytest.warns(DeprecationWarning):
-            relativedelta(year=2.86)
-
+            relativedelta(year=2.86) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(month=1.29)
-
+            relativedelta(month=1.29) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(day=0.44)
-
+            relativedelta(day=0.44) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(hour=23.98)
-
+            relativedelta(hour=23.98) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(minute=45.21)
-
+            relativedelta(minute=45.21) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(second=13.2)
-
+            relativedelta(second=13.2) 
+ 
         with pytest.warns(DeprecationWarning):
-            relativedelta(microsecond=157221.93)
-
-    def testRelativeDeltaFractionalRepr(self):
-        rd = relativedelta(years=3, months=-2, days=1.25)
-
-        self.assertEqual(repr(rd),
-                         'relativedelta(years=+3, months=-2, days=+1.25)')
-
-        rd = relativedelta(hours=0.5, seconds=9.22)
-        self.assertEqual(repr(rd),
-                         'relativedelta(hours=+0.5, seconds=+9.22)')
-
-    def testRelativeDeltaFractionalWeeks(self):
-        # Equivalent to days=8, hours=18
-        rd = relativedelta(weeks=1.25)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd,
-                         datetime(2009, 9, 11, 18))
-
-    def testRelativeDeltaFractionalDays(self):
-        rd1 = relativedelta(days=1.48)
-
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd1,
-                         datetime(2009, 9, 4, 11, 31, 12))
-
-        rd2 = relativedelta(days=1.5)
-        self.assertEqual(d1 + rd2,
-                         datetime(2009, 9, 4, 12, 0, 0))
-
-    def testRelativeDeltaFractionalHours(self):
-        rd = relativedelta(days=1, hours=12.5)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd,
-                         datetime(2009, 9, 4, 12, 30, 0))
-
-    def testRelativeDeltaFractionalMinutes(self):
-        rd = relativedelta(hours=1, minutes=30.5)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd,
-                         datetime(2009, 9, 3, 1, 30, 30))
-
-    def testRelativeDeltaFractionalSeconds(self):
-        rd = relativedelta(hours=5, minutes=30, seconds=30.5)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd,
-                         datetime(2009, 9, 3, 5, 30, 30, 500000))
-
-    def testRelativeDeltaFractionalPositiveOverflow(self):
-        # Equivalent to (days=1, hours=14)
-        rd1 = relativedelta(days=1.5, hours=2)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd1,
-                         datetime(2009, 9, 4, 14, 0, 0))
-
-        # Equivalent to (days=1, hours=14, minutes=45)
-        rd2 = relativedelta(days=1.5, hours=2.5, minutes=15)
-        d1 = datetime(2009, 9, 3, 0, 0)
-        self.assertEqual(d1 + rd2,
-                         datetime(2009, 9, 4, 14, 45))
-
-        # Carry back up - equivalent to (days=2, hours=2, minutes=0, seconds=1)
-        rd3 = relativedelta(days=1.5, hours=13, minutes=59.5, seconds=31)
-        self.assertEqual(d1 + rd3,
-                         datetime(2009, 9, 5, 2, 0, 1))
-
-    def testRelativeDeltaFractionalNegativeDays(self):
-        # Equivalent to (days=-1, hours=-1)
-        rd1 = relativedelta(days=-1.5, hours=11)
-        d1 = datetime(2009, 9, 3, 12, 0)
-        self.assertEqual(d1 + rd1,
-                         datetime(2009, 9, 2, 11, 0, 0))
-
-        # Equivalent to (days=-1, hours=-9)
-        rd2 = relativedelta(days=-1.25, hours=-3)
-        self.assertEqual(d1 + rd2,
-            datetime(2009, 9, 2, 3))
-
-    def testRelativeDeltaNormalizeFractionalDays(self):
-        # Equivalent to (days=2, hours=18)
-        rd1 = relativedelta(days=2.75)
-
-        self.assertEqual(rd1.normalized(), relativedelta(days=2, hours=18))
-
+            relativedelta(microsecond=157221.93) 
+ 
+    def testRelativeDeltaFractionalRepr(self): 
+        rd = relativedelta(years=3, months=-2, days=1.25) 
+ 
+        self.assertEqual(repr(rd), 
+                         'relativedelta(years=+3, months=-2, days=+1.25)') 
+ 
+        rd = relativedelta(hours=0.5, seconds=9.22) 
+        self.assertEqual(repr(rd), 
+                         'relativedelta(hours=+0.5, seconds=+9.22)') 
+ 
+    def testRelativeDeltaFractionalWeeks(self): 
+        # Equivalent to days=8, hours=18 
+        rd = relativedelta(weeks=1.25) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd, 
+                         datetime(2009, 9, 11, 18)) 
+ 
+    def testRelativeDeltaFractionalDays(self): 
+        rd1 = relativedelta(days=1.48) 
+ 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd1, 
+                         datetime(2009, 9, 4, 11, 31, 12)) 
+ 
+        rd2 = relativedelta(days=1.5) 
+        self.assertEqual(d1 + rd2, 
+                         datetime(2009, 9, 4, 12, 0, 0)) 
+ 
+    def testRelativeDeltaFractionalHours(self): 
+        rd = relativedelta(days=1, hours=12.5) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd, 
+                         datetime(2009, 9, 4, 12, 30, 0)) 
+ 
+    def testRelativeDeltaFractionalMinutes(self): 
+        rd = relativedelta(hours=1, minutes=30.5) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd, 
+                         datetime(2009, 9, 3, 1, 30, 30)) 
+ 
+    def testRelativeDeltaFractionalSeconds(self): 
+        rd = relativedelta(hours=5, minutes=30, seconds=30.5) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd, 
+                         datetime(2009, 9, 3, 5, 30, 30, 500000)) 
+ 
+    def testRelativeDeltaFractionalPositiveOverflow(self): 
+        # Equivalent to (days=1, hours=14) 
+        rd1 = relativedelta(days=1.5, hours=2) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd1, 
+                         datetime(2009, 9, 4, 14, 0, 0)) 
+ 
+        # Equivalent to (days=1, hours=14, minutes=45) 
+        rd2 = relativedelta(days=1.5, hours=2.5, minutes=15) 
+        d1 = datetime(2009, 9, 3, 0, 0) 
+        self.assertEqual(d1 + rd2, 
+                         datetime(2009, 9, 4, 14, 45)) 
+ 
+        # Carry back up - equivalent to (days=2, hours=2, minutes=0, seconds=1) 
+        rd3 = relativedelta(days=1.5, hours=13, minutes=59.5, seconds=31) 
+        self.assertEqual(d1 + rd3, 
+                         datetime(2009, 9, 5, 2, 0, 1)) 
+ 
+    def testRelativeDeltaFractionalNegativeDays(self): 
+        # Equivalent to (days=-1, hours=-1) 
+        rd1 = relativedelta(days=-1.5, hours=11) 
+        d1 = datetime(2009, 9, 3, 12, 0) 
+        self.assertEqual(d1 + rd1, 
+                         datetime(2009, 9, 2, 11, 0, 0)) 
+ 
+        # Equivalent to (days=-1, hours=-9) 
+        rd2 = relativedelta(days=-1.25, hours=-3) 
+        self.assertEqual(d1 + rd2, 
+            datetime(2009, 9, 2, 3)) 
+ 
+    def testRelativeDeltaNormalizeFractionalDays(self): 
+        # Equivalent to (days=2, hours=18) 
+        rd1 = relativedelta(days=2.75) 
+ 
+        self.assertEqual(rd1.normalized(), relativedelta(days=2, hours=18)) 
+ 
         # Equivalent to (days=1, hours=11, minutes=31, seconds=12)
-        rd2 = relativedelta(days=1.48)
-
-        self.assertEqual(rd2.normalized(),
-            relativedelta(days=1, hours=11, minutes=31, seconds=12))
-
-    def testRelativeDeltaNormalizeFractionalDays2(self):
-        # Equivalent to (hours=1, minutes=30)
-        rd1 = relativedelta(hours=1.5)
-
-        self.assertEqual(rd1.normalized(), relativedelta(hours=1, minutes=30))
-
-        # Equivalent to (hours=3, minutes=17, seconds=5, microseconds=100)
-        rd2 = relativedelta(hours=3.28472225)
-
-        self.assertEqual(rd2.normalized(),
-            relativedelta(hours=3, minutes=17, seconds=5, microseconds=100))
-
-    def testRelativeDeltaNormalizeFractionalMinutes(self):
-        # Equivalent to (minutes=15, seconds=36)
-        rd1 = relativedelta(minutes=15.6)
-
-        self.assertEqual(rd1.normalized(),
-            relativedelta(minutes=15, seconds=36))
-
-        # Equivalent to (minutes=25, seconds=20, microseconds=25000)
-        rd2 = relativedelta(minutes=25.33375)
-
-        self.assertEqual(rd2.normalized(),
-            relativedelta(minutes=25, seconds=20, microseconds=25000))
-
-    def testRelativeDeltaNormalizeFractionalSeconds(self):
-        # Equivalent to (seconds=45, microseconds=25000)
-        rd1 = relativedelta(seconds=45.025)
-        self.assertEqual(rd1.normalized(),
-            relativedelta(seconds=45, microseconds=25000))
-
-    def testRelativeDeltaFractionalPositiveOverflow2(self):
-        # Equivalent to (days=1, hours=14)
-        rd1 = relativedelta(days=1.5, hours=2)
-        self.assertEqual(rd1.normalized(),
-            relativedelta(days=1, hours=14))
-
-        # Equivalent to (days=1, hours=14, minutes=45)
-        rd2 = relativedelta(days=1.5, hours=2.5, minutes=15)
-        self.assertEqual(rd2.normalized(),
-            relativedelta(days=1, hours=14, minutes=45))
-
-        # Carry back up - equivalent to:
-        # (days=2, hours=2, minutes=0, seconds=2, microseconds=3)
-        rd3 = relativedelta(days=1.5, hours=13, minutes=59.50045,
-                            seconds=31.473, microseconds=500003)
-        self.assertEqual(rd3.normalized(),
-            relativedelta(days=2, hours=2, minutes=0,
-                          seconds=2, microseconds=3))
-
-    def testRelativeDeltaFractionalNegativeOverflow(self):
-        # Equivalent to (days=-1)
-        rd1 = relativedelta(days=-0.5, hours=-12)
-        self.assertEqual(rd1.normalized(),
-            relativedelta(days=-1))
-
-        # Equivalent to (days=-1)
-        rd2 = relativedelta(days=-1.5, hours=12)
-        self.assertEqual(rd2.normalized(),
-            relativedelta(days=-1))
-
-        # Equivalent to (days=-1, hours=-14, minutes=-45)
-        rd3 = relativedelta(days=-1.5, hours=-2.5, minutes=-15)
-        self.assertEqual(rd3.normalized(),
-            relativedelta(days=-1, hours=-14, minutes=-45))
-
-        # Equivalent to (days=-1, hours=-14, minutes=+15)
-        rd4 = relativedelta(days=-1.5, hours=-2.5, minutes=45)
-        self.assertEqual(rd4.normalized(),
-            relativedelta(days=-1, hours=-14, minutes=+15))
-
-        # Carry back up - equivalent to:
-        # (days=-2, hours=-2, minutes=0, seconds=-2, microseconds=-3)
-        rd3 = relativedelta(days=-1.5, hours=-13, minutes=-59.50045,
-                            seconds=-31.473, microseconds=-500003)
-        self.assertEqual(rd3.normalized(),
-            relativedelta(days=-2, hours=-2, minutes=0,
-                          seconds=-2, microseconds=-3))
-
-    def testInvalidYearDay(self):
-        with self.assertRaises(ValueError):
-            relativedelta(yearday=367)
-
-    def testAddTimedeltaToUnpopulatedRelativedelta(self):
-        td = timedelta(
-            days=1,
-            seconds=1,
-            microseconds=1,
-            milliseconds=1,
-            minutes=1,
-            hours=1,
-            weeks=1
-        )
-
-        expected = relativedelta(
-            weeks=1,
-            days=1,
-            hours=1,
-            minutes=1,
-            seconds=1,
-            microseconds=1001
-        )
-
-        self.assertEqual(expected, relativedelta() + td)
-
-    def testAddTimedeltaToPopulatedRelativeDelta(self):
-        td = timedelta(
-            days=1,
-            seconds=1,
-            microseconds=1,
-            milliseconds=1,
-            minutes=1,
-            hours=1,
-            weeks=1
-        )
-
-        rd = relativedelta(
-            year=1,
-            month=1,
-            day=1,
-            hour=1,
-            minute=1,
-            second=1,
-            microsecond=1,
-            years=1,
-            months=1,
-            days=1,
-            weeks=1,
-            hours=1,
-            minutes=1,
-            seconds=1,
-            microseconds=1
-        )
-
-        expected = relativedelta(
-            year=1,
-            month=1,
-            day=1,
-            hour=1,
-            minute=1,
-            second=1,
-            microsecond=1,
-            years=1,
-            months=1,
-            weeks=2,
-            days=2,
-            hours=2,
-            minutes=2,
-            seconds=2,
-            microseconds=1002,
-        )
-
-        self.assertEqual(expected, rd + td)
-
-    def testHashable(self):
-        try:
-            {relativedelta(minute=1): 'test'}
-        except:
-            self.fail("relativedelta() failed to hash!")
-
-
-class RelativeDeltaWeeksPropertyGetterTest(unittest.TestCase):
-    """Test the weeks property getter"""
-
-    def test_one_day(self):
-        rd = relativedelta(days=1)
-        self.assertEqual(rd.days, 1)
-        self.assertEqual(rd.weeks, 0)
-
-    def test_minus_one_day(self):
-        rd = relativedelta(days=-1)
-        self.assertEqual(rd.days, -1)
-        self.assertEqual(rd.weeks, 0)
-
-    def test_height_days(self):
-        rd = relativedelta(days=8)
-        self.assertEqual(rd.days, 8)
-        self.assertEqual(rd.weeks, 1)
-
-    def test_minus_height_days(self):
-        rd = relativedelta(days=-8)
-        self.assertEqual(rd.days, -8)
-        self.assertEqual(rd.weeks, -1)
-
-
-class RelativeDeltaWeeksPropertySetterTest(unittest.TestCase):
-    """Test the weeks setter which makes a "smart" update of the days attribute"""
-
-    def test_one_day_set_one_week(self):
-        rd = relativedelta(days=1)
-        rd.weeks = 1  # add 7 days
-        self.assertEqual(rd.days, 8)
-        self.assertEqual(rd.weeks, 1)
-
-    def test_minus_one_day_set_one_week(self):
-        rd = relativedelta(days=-1)
-        rd.weeks = 1  # add 7 days
-        self.assertEqual(rd.days, 6)
-        self.assertEqual(rd.weeks, 0)
-
-    def test_height_days_set_minus_one_week(self):
-        rd = relativedelta(days=8)
-        rd.weeks = -1  # change from 1 week, 1 day to -1 week, 1 day
-        self.assertEqual(rd.days, -6)
-        self.assertEqual(rd.weeks, 0)
-
-    def test_minus_height_days_set_minus_one_week(self):
-        rd = relativedelta(days=-8)
-        rd.weeks = -1  # does not change anything
-        self.assertEqual(rd.days, -8)
-        self.assertEqual(rd.weeks, -1)
-
-
-# vim:ts=4:sw=4:et
+        rd2 = relativedelta(days=1.48) 
+ 
+        self.assertEqual(rd2.normalized(), 
+            relativedelta(days=1, hours=11, minutes=31, seconds=12)) 
+ 
+    def testRelativeDeltaNormalizeFractionalDays2(self): 
+        # Equivalent to (hours=1, minutes=30) 
+        rd1 = relativedelta(hours=1.5) 
+ 
+        self.assertEqual(rd1.normalized(), relativedelta(hours=1, minutes=30)) 
+ 
+        # Equivalent to (hours=3, minutes=17, seconds=5, microseconds=100) 
+        rd2 = relativedelta(hours=3.28472225) 
+ 
+        self.assertEqual(rd2.normalized(), 
+            relativedelta(hours=3, minutes=17, seconds=5, microseconds=100)) 
+ 
+    def testRelativeDeltaNormalizeFractionalMinutes(self): 
+        # Equivalent to (minutes=15, seconds=36) 
+        rd1 = relativedelta(minutes=15.6) 
+ 
+        self.assertEqual(rd1.normalized(), 
+            relativedelta(minutes=15, seconds=36)) 
+ 
+        # Equivalent to (minutes=25, seconds=20, microseconds=25000) 
+        rd2 = relativedelta(minutes=25.33375) 
+ 
+        self.assertEqual(rd2.normalized(), 
+            relativedelta(minutes=25, seconds=20, microseconds=25000)) 
+ 
+    def testRelativeDeltaNormalizeFractionalSeconds(self): 
+        # Equivalent to (seconds=45, microseconds=25000) 
+        rd1 = relativedelta(seconds=45.025) 
+        self.assertEqual(rd1.normalized(), 
+            relativedelta(seconds=45, microseconds=25000)) 
+ 
+    def testRelativeDeltaFractionalPositiveOverflow2(self): 
+        # Equivalent to (days=1, hours=14) 
+        rd1 = relativedelta(days=1.5, hours=2) 
+        self.assertEqual(rd1.normalized(), 
+            relativedelta(days=1, hours=14)) 
+ 
+        # Equivalent to (days=1, hours=14, minutes=45) 
+        rd2 = relativedelta(days=1.5, hours=2.5, minutes=15) 
+        self.assertEqual(rd2.normalized(), 
+            relativedelta(days=1, hours=14, minutes=45)) 
+ 
+        # Carry back up - equivalent to: 
+        # (days=2, hours=2, minutes=0, seconds=2, microseconds=3) 
+        rd3 = relativedelta(days=1.5, hours=13, minutes=59.50045, 
+                            seconds=31.473, microseconds=500003) 
+        self.assertEqual(rd3.normalized(), 
+            relativedelta(days=2, hours=2, minutes=0, 
+                          seconds=2, microseconds=3)) 
+ 
+    def testRelativeDeltaFractionalNegativeOverflow(self): 
+        # Equivalent to (days=-1) 
+        rd1 = relativedelta(days=-0.5, hours=-12) 
+        self.assertEqual(rd1.normalized(), 
+            relativedelta(days=-1)) 
+ 
+        # Equivalent to (days=-1) 
+        rd2 = relativedelta(days=-1.5, hours=12) 
+        self.assertEqual(rd2.normalized(), 
+            relativedelta(days=-1)) 
+ 
+        # Equivalent to (days=-1, hours=-14, minutes=-45) 
+        rd3 = relativedelta(days=-1.5, hours=-2.5, minutes=-15) 
+        self.assertEqual(rd3.normalized(), 
+            relativedelta(days=-1, hours=-14, minutes=-45)) 
+ 
+        # Equivalent to (days=-1, hours=-14, minutes=+15) 
+        rd4 = relativedelta(days=-1.5, hours=-2.5, minutes=45) 
+        self.assertEqual(rd4.normalized(), 
+            relativedelta(days=-1, hours=-14, minutes=+15)) 
+ 
+        # Carry back up - equivalent to: 
+        # (days=-2, hours=-2, minutes=0, seconds=-2, microseconds=-3) 
+        rd3 = relativedelta(days=-1.5, hours=-13, minutes=-59.50045, 
+                            seconds=-31.473, microseconds=-500003) 
+        self.assertEqual(rd3.normalized(), 
+            relativedelta(days=-2, hours=-2, minutes=0, 
+                          seconds=-2, microseconds=-3)) 
+ 
+    def testInvalidYearDay(self): 
+        with self.assertRaises(ValueError): 
+            relativedelta(yearday=367) 
+ 
+    def testAddTimedeltaToUnpopulatedRelativedelta(self): 
+        td = timedelta( 
+            days=1, 
+            seconds=1, 
+            microseconds=1, 
+            milliseconds=1, 
+            minutes=1, 
+            hours=1, 
+            weeks=1 
+        ) 
+ 
+        expected = relativedelta( 
+            weeks=1, 
+            days=1, 
+            hours=1, 
+            minutes=1, 
+            seconds=1, 
+            microseconds=1001 
+        ) 
+ 
+        self.assertEqual(expected, relativedelta() + td) 
+ 
+    def testAddTimedeltaToPopulatedRelativeDelta(self): 
+        td = timedelta( 
+            days=1, 
+            seconds=1, 
+            microseconds=1, 
+            milliseconds=1, 
+            minutes=1, 
+            hours=1, 
+            weeks=1 
+        ) 
+ 
+        rd = relativedelta( 
+            year=1, 
+            month=1, 
+            day=1, 
+            hour=1, 
+            minute=1, 
+            second=1, 
+            microsecond=1, 
+            years=1, 
+            months=1, 
+            days=1, 
+            weeks=1, 
+            hours=1, 
+            minutes=1, 
+            seconds=1, 
+            microseconds=1 
+        ) 
+ 
+        expected = relativedelta( 
+            year=1, 
+            month=1, 
+            day=1, 
+            hour=1, 
+            minute=1, 
+            second=1, 
+            microsecond=1, 
+            years=1, 
+            months=1, 
+            weeks=2, 
+            days=2, 
+            hours=2, 
+            minutes=2, 
+            seconds=2, 
+            microseconds=1002, 
+        ) 
+ 
+        self.assertEqual(expected, rd + td) 
+ 
+    def testHashable(self): 
+        try: 
+            {relativedelta(minute=1): 'test'} 
+        except: 
+            self.fail("relativedelta() failed to hash!") 
+ 
+ 
+class RelativeDeltaWeeksPropertyGetterTest(unittest.TestCase): 
+    """Test the weeks property getter""" 
+ 
+    def test_one_day(self): 
+        rd = relativedelta(days=1) 
+        self.assertEqual(rd.days, 1) 
+        self.assertEqual(rd.weeks, 0) 
+ 
+    def test_minus_one_day(self): 
+        rd = relativedelta(days=-1) 
+        self.assertEqual(rd.days, -1) 
+        self.assertEqual(rd.weeks, 0) 
+ 
+    def test_height_days(self): 
+        rd = relativedelta(days=8) 
+        self.assertEqual(rd.days, 8) 
+        self.assertEqual(rd.weeks, 1) 
+ 
+    def test_minus_height_days(self): 
+        rd = relativedelta(days=-8) 
+        self.assertEqual(rd.days, -8) 
+        self.assertEqual(rd.weeks, -1) 
+ 
+ 
+class RelativeDeltaWeeksPropertySetterTest(unittest.TestCase): 
+    """Test the weeks setter which makes a "smart" update of the days attribute""" 
+ 
+    def test_one_day_set_one_week(self): 
+        rd = relativedelta(days=1) 
+        rd.weeks = 1  # add 7 days 
+        self.assertEqual(rd.days, 8) 
+        self.assertEqual(rd.weeks, 1) 
+ 
+    def test_minus_one_day_set_one_week(self): 
+        rd = relativedelta(days=-1) 
+        rd.weeks = 1  # add 7 days 
+        self.assertEqual(rd.days, 6) 
+        self.assertEqual(rd.weeks, 0) 
+ 
+    def test_height_days_set_minus_one_week(self): 
+        rd = relativedelta(days=8) 
+        rd.weeks = -1  # change from 1 week, 1 day to -1 week, 1 day 
+        self.assertEqual(rd.days, -6) 
+        self.assertEqual(rd.weeks, 0) 
+ 
+    def test_minus_height_days_set_minus_one_week(self): 
+        rd = relativedelta(days=-8) 
+        rd.weeks = -1  # does not change anything 
+        self.assertEqual(rd.days, -8) 
+        self.assertEqual(rd.weeks, -1) 
+ 
+ 
+# vim:ts=4:sw=4:et 
diff --git a/contrib/python/dateutil/dateutil/test/test_rrule.py b/contrib/python/dateutil/dateutil/test/test_rrule.py
index 52673ecc26..ccd33bb234 100644
--- a/contrib/python/dateutil/dateutil/test/test_rrule.py
+++ b/contrib/python/dateutil/dateutil/test/test_rrule.py
@@ -1,2857 +1,2857 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
-from datetime import datetime, date
-import unittest
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
+ 
+from datetime import datetime, date 
+import unittest 
 from six import PY2
-
-from dateutil import tz
-from dateutil.rrule import (
-    rrule, rruleset, rrulestr,
-    YEARLY, MONTHLY, WEEKLY, DAILY,
-    HOURLY, MINUTELY, SECONDLY,
-    MO, TU, WE, TH, FR, SA, SU
-)
-
-from freezegun import freeze_time
-
-import pytest
-
-
-@pytest.mark.rrule
+ 
+from dateutil import tz 
+from dateutil.rrule import ( 
+    rrule, rruleset, rrulestr, 
+    YEARLY, MONTHLY, WEEKLY, DAILY, 
+    HOURLY, MINUTELY, SECONDLY, 
+    MO, TU, WE, TH, FR, SA, SU 
+) 
+ 
+from freezegun import freeze_time 
+ 
+import pytest 
+ 
+ 
+@pytest.mark.rrule 
 class RRuleTest(unittest.TestCase):
-    def _rrulestr_reverse_test(self, rule):
-        """
-        Call with an `rrule` and it will test that `str(rrule)` generates a
-        string which generates the same `rrule` as the input when passed to
-        `rrulestr()`
-        """
-        rr_str = str(rule)
-        rrulestr_rrule = rrulestr(rr_str)
-
-        self.assertEqual(list(rule), list(rrulestr_rrule))
-
-    def testStrAppendRRULEToken(self):
-        # `_rrulestr_reverse_test` does not check if the "RRULE:" prefix
-        # property is appended properly, so give it a dedicated test
-        self.assertEqual(str(rrule(YEARLY,
-                             count=5,
-                             dtstart=datetime(1997, 9, 2, 9, 0))),
-                         "DTSTART:19970902T090000\n"
-                         "RRULE:FREQ=YEARLY;COUNT=5")
-
-        rr_str = (
-          'DTSTART:19970105T083000\nRRULE:FREQ=YEARLY;INTERVAL=2'
-        )
-        self.assertEqual(str(rrulestr(rr_str)), rr_str)
-
-    def testYearly(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testYearlyInterval(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0),
-                          datetime(2001, 9, 2, 9, 0)])
-
-    def testYearlyIntervalLarge(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              interval=100,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(2097, 9, 2, 9, 0),
-                          datetime(2197, 9, 2, 9, 0)])
-
-    def testYearlyByMonth(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 2, 9, 0),
-                          datetime(1998, 3, 2, 9, 0),
-                          datetime(1999, 1, 2, 9, 0)])
-
-    def testYearlyByMonthDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 10, 1, 9, 0),
-                          datetime(1997, 10, 3, 9, 0)])
-
-    def testYearlyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 9, 0),
-                          datetime(1998, 1, 7, 9, 0),
-                          datetime(1998, 3, 5, 9, 0)])
-
-    def testYearlyByWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testYearlyByNWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 25, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 12, 31, 9, 0)])
-
-    def testYearlyByNWeekDayLarge(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 11, 9, 0),
-                          datetime(1998, 1, 20, 9, 0),
-                          datetime(1998, 12, 17, 9, 0)])
-
-    def testYearlyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testYearlyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 29, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testYearlyByMonthAndNWeekDayLarge(self):
-        # This is interesting because the TH(-3) ends up before
-        # the TU(3).
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 15, 9, 0),
-                          datetime(1998, 1, 20, 9, 0),
-                          datetime(1998, 3, 12, 9, 0)])
-
-    def testYearlyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 2, 3, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testYearlyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 3, 3, 9, 0),
-                          datetime(2001, 3, 1, 9, 0)])
-
-    def testYearlyByYearDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testYearlyByYearDayNeg(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testYearlyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 4, 10, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testYearlyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 4, 10, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testYearlyByWeekNo(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 9, 0),
-                          datetime(1998, 5, 12, 9, 0),
-                          datetime(1998, 5, 13, 9, 0)])
-
-    def testYearlyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 9, 0),
-                          datetime(1999, 1, 4, 9, 0),
-                          datetime(2000, 1, 3, 9, 0)])
-
-    def testYearlyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1998, 12, 27, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testYearlyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1999, 1, 3, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testYearlyByEaster(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 9, 0),
-                          datetime(1999, 4, 4, 9, 0),
-                          datetime(2000, 4, 23, 9, 0)])
-
-    def testYearlyByEasterPos(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 9, 0),
-                          datetime(1999, 4, 5, 9, 0),
-                          datetime(2000, 4, 24, 9, 0)])
-
-    def testYearlyByEasterNeg(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 9, 0),
-                          datetime(1999, 4, 3, 9, 0),
-                          datetime(2000, 4, 22, 9, 0)])
-
-    def testYearlyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 9, 0),
-                          datetime(2004, 12, 27, 9, 0),
-                          datetime(2009, 12, 28, 9, 0)])
-
-    def testYearlyByHour(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1998, 9, 2, 6, 0),
-                          datetime(1998, 9, 2, 18, 0)])
-
-    def testYearlyByMinute(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1998, 9, 2, 9, 6)])
-
-    def testYearlyBySecond(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1998, 9, 2, 9, 0, 6)])
-
-    def testYearlyByHourAndMinute(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1998, 9, 2, 6, 6)])
-
-    def testYearlyByHourAndSecond(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1998, 9, 2, 6, 0, 6)])
-
-    def testYearlyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testYearlyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testYearlyBySetPos(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonthday=15,
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 11, 15, 18, 0),
-                          datetime(1998, 2, 15, 6, 0),
-                          datetime(1998, 11, 15, 18, 0)])
-
-    def testMonthly(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 10, 2, 9, 0),
-                          datetime(1997, 11, 2, 9, 0)])
-
-    def testMonthlyInterval(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 11, 2, 9, 0),
-                          datetime(1998, 1, 2, 9, 0)])
-
-    def testMonthlyIntervalLarge(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              interval=18,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1999, 3, 2, 9, 0),
-                          datetime(2000, 9, 2, 9, 0)])
-
-    def testMonthlyByMonth(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 2, 9, 0),
-                          datetime(1998, 3, 2, 9, 0),
-                          datetime(1999, 1, 2, 9, 0)])
-
-    def testMonthlyByMonthDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 10, 1, 9, 0),
-                          datetime(1997, 10, 3, 9, 0)])
-
-    def testMonthlyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 9, 0),
-                          datetime(1998, 1, 7, 9, 0),
-                          datetime(1998, 3, 5, 9, 0)])
-
-    def testMonthlyByWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-        # Third Monday of the month
-        self.assertEqual(rrule(MONTHLY,
-                         byweekday=(MO(+3)),
-                         dtstart=datetime(1997, 9, 1)).between(datetime(1997, 9, 1),
-                                                               datetime(1997, 12, 1)),
-                         [datetime(1997, 9, 15, 0, 0),
-                          datetime(1997, 10, 20, 0, 0),
-                          datetime(1997, 11, 17, 0, 0)])
-
-    def testMonthlyByNWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 25, 9, 0),
-                          datetime(1997, 10, 7, 9, 0)])
-
-    def testMonthlyByNWeekDayLarge(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 11, 9, 0),
-                          datetime(1997, 9, 16, 9, 0),
-                          datetime(1997, 10, 16, 9, 0)])
-
-    def testMonthlyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testMonthlyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 29, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testMonthlyByMonthAndNWeekDayLarge(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 15, 9, 0),
-                          datetime(1998, 1, 20, 9, 0),
-                          datetime(1998, 3, 12, 9, 0)])
-
-    def testMonthlyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 2, 3, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testMonthlyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 3, 3, 9, 0),
-                          datetime(2001, 3, 1, 9, 0)])
-
-    def testMonthlyByYearDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testMonthlyByYearDayNeg(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testMonthlyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 4, 10, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testMonthlyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 4, 10, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testMonthlyByWeekNo(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 9, 0),
-                          datetime(1998, 5, 12, 9, 0),
-                          datetime(1998, 5, 13, 9, 0)])
-
-    def testMonthlyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 9, 0),
-                          datetime(1999, 1, 4, 9, 0),
-                          datetime(2000, 1, 3, 9, 0)])
-
-    def testMonthlyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1998, 12, 27, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testMonthlyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1999, 1, 3, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testMonthlyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 9, 0),
-                          datetime(2004, 12, 27, 9, 0),
-                          datetime(2009, 12, 28, 9, 0)])
-
-    def testMonthlyByEaster(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 9, 0),
-                          datetime(1999, 4, 4, 9, 0),
-                          datetime(2000, 4, 23, 9, 0)])
-
-    def testMonthlyByEasterPos(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 9, 0),
-                          datetime(1999, 4, 5, 9, 0),
-                          datetime(2000, 4, 24, 9, 0)])
-
-    def testMonthlyByEasterNeg(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 9, 0),
-                          datetime(1999, 4, 3, 9, 0),
-                          datetime(2000, 4, 22, 9, 0)])
-
-    def testMonthlyByHour(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 10, 2, 6, 0),
-                          datetime(1997, 10, 2, 18, 0)])
-
-    def testMonthlyByMinute(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1997, 10, 2, 9, 6)])
-
-    def testMonthlyBySecond(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 10, 2, 9, 0, 6)])
-
-    def testMonthlyByHourAndMinute(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1997, 10, 2, 6, 6)])
-
-    def testMonthlyByHourAndSecond(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 10, 2, 6, 0, 6)])
-
-    def testMonthlyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testMonthlyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testMonthlyBySetPos(self):
-        self.assertEqual(list(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(13, 17),
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 13, 18, 0),
-                          datetime(1997, 9, 17, 6, 0),
-                          datetime(1997, 10, 13, 18, 0)])
-
-    def testWeekly(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testWeeklyInterval(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 16, 9, 0),
-                          datetime(1997, 9, 30, 9, 0)])
-
-    def testWeeklyIntervalLarge(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              interval=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 1, 20, 9, 0),
-                          datetime(1998, 6, 9, 9, 0)])
-
-    def testWeeklyByMonth(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 13, 9, 0),
-                          datetime(1998, 1, 20, 9, 0)])
-
-    def testWeeklyByMonthDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 10, 1, 9, 0),
-                          datetime(1997, 10, 3, 9, 0)])
-
-    def testWeeklyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 9, 0),
-                          datetime(1998, 1, 7, 9, 0),
-                          datetime(1998, 3, 5, 9, 0)])
-
-    def testWeeklyByWeekDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testWeeklyByNWeekDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testWeeklyByMonthAndWeekDay(self):
-        # This test is interesting, because it crosses the year
-        # boundary in a weekly period to find day '1' as a
-        # valid recurrence.
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testWeeklyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testWeeklyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 2, 3, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testWeeklyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 3, 3, 9, 0),
-                          datetime(2001, 3, 1, 9, 0)])
-
-    def testWeeklyByYearDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testWeeklyByYearDayNeg(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testWeeklyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 1, 1, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testWeeklyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 1, 1, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testWeeklyByWeekNo(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 9, 0),
-                          datetime(1998, 5, 12, 9, 0),
-                          datetime(1998, 5, 13, 9, 0)])
-
-    def testWeeklyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 9, 0),
-                          datetime(1999, 1, 4, 9, 0),
-                          datetime(2000, 1, 3, 9, 0)])
-
-    def testWeeklyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1998, 12, 27, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testWeeklyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1999, 1, 3, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testWeeklyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 9, 0),
-                          datetime(2004, 12, 27, 9, 0),
-                          datetime(2009, 12, 28, 9, 0)])
-
-    def testWeeklyByEaster(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 9, 0),
-                          datetime(1999, 4, 4, 9, 0),
-                          datetime(2000, 4, 23, 9, 0)])
-
-    def testWeeklyByEasterPos(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 9, 0),
-                          datetime(1999, 4, 5, 9, 0),
-                          datetime(2000, 4, 24, 9, 0)])
-
-    def testWeeklyByEasterNeg(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 9, 0),
-                          datetime(1999, 4, 3, 9, 0),
-                          datetime(2000, 4, 22, 9, 0)])
-
-    def testWeeklyByHour(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 9, 9, 6, 0),
-                          datetime(1997, 9, 9, 18, 0)])
-
-    def testWeeklyByMinute(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1997, 9, 9, 9, 6)])
-
-    def testWeeklyBySecond(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 9, 9, 9, 0, 6)])
-
-    def testWeeklyByHourAndMinute(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1997, 9, 9, 6, 6)])
-
-    def testWeeklyByHourAndSecond(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 9, 9, 6, 0, 6)])
-
-    def testWeeklyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testWeeklyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testWeeklyBySetPos(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 9, 4, 6, 0),
-                          datetime(1997, 9, 9, 18, 0)])
-
-    def testDaily(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testDailyInterval(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 6, 9, 0)])
-
-    def testDailyIntervalLarge(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              interval=92,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 12, 3, 9, 0),
-                          datetime(1998, 3, 5, 9, 0)])
-
-    def testDailyByMonth(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 2, 9, 0),
-                          datetime(1998, 1, 3, 9, 0)])
-
-    def testDailyByMonthDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 10, 1, 9, 0),
-                          datetime(1997, 10, 3, 9, 0)])
-
-    def testDailyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 9, 0),
-                          datetime(1998, 1, 7, 9, 0),
-                          datetime(1998, 3, 5, 9, 0)])
-
-    def testDailyByWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testDailyByNWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testDailyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testDailyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 1, 8, 9, 0)])
-
-    def testDailyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 2, 3, 9, 0),
-                          datetime(1998, 3, 3, 9, 0)])
-
-    def testDailyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 3, 3, 9, 0),
-                          datetime(2001, 3, 1, 9, 0)])
-
-    def testDailyByYearDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testDailyByYearDayNeg(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 9, 0),
-                          datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 4, 10, 9, 0),
-                          datetime(1998, 7, 19, 9, 0)])
-
-    def testDailyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 1, 1, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testDailyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 9, 0),
-                          datetime(1998, 7, 19, 9, 0),
-                          datetime(1999, 1, 1, 9, 0),
-                          datetime(1999, 7, 19, 9, 0)])
-
-    def testDailyByWeekNo(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 9, 0),
-                          datetime(1998, 5, 12, 9, 0),
-                          datetime(1998, 5, 13, 9, 0)])
-
-    def testDailyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 9, 0),
-                          datetime(1999, 1, 4, 9, 0),
-                          datetime(2000, 1, 3, 9, 0)])
-
-    def testDailyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1998, 12, 27, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testDailyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 9, 0),
-                          datetime(1999, 1, 3, 9, 0),
-                          datetime(2000, 1, 2, 9, 0)])
-
-    def testDailyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 9, 0),
-                          datetime(2004, 12, 27, 9, 0),
-                          datetime(2009, 12, 28, 9, 0)])
-
-    def testDailyByEaster(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 9, 0),
-                          datetime(1999, 4, 4, 9, 0),
-                          datetime(2000, 4, 23, 9, 0)])
-
-    def testDailyByEasterPos(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 9, 0),
-                          datetime(1999, 4, 5, 9, 0),
-                          datetime(2000, 4, 24, 9, 0)])
-
-    def testDailyByEasterNeg(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 9, 0),
-                          datetime(1999, 4, 3, 9, 0),
-                          datetime(2000, 4, 22, 9, 0)])
-
-    def testDailyByHour(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 9, 3, 6, 0),
-                          datetime(1997, 9, 3, 18, 0)])
-
-    def testDailyByMinute(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1997, 9, 3, 9, 6)])
-
-    def testDailyBySecond(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 9, 3, 9, 0, 6)])
-
-    def testDailyByHourAndMinute(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1997, 9, 3, 6, 6)])
-
-    def testDailyByHourAndSecond(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 9, 3, 6, 0, 6)])
-
-    def testDailyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testDailyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testDailyBySetPos(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(15, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 15),
-                          datetime(1997, 9, 3, 6, 45),
-                          datetime(1997, 9, 3, 18, 15)])
-
-    def testHourly(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 10, 0),
-                          datetime(1997, 9, 2, 11, 0)])
-
-    def testHourlyInterval(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 11, 0),
-                          datetime(1997, 9, 2, 13, 0)])
-
-    def testHourlyIntervalLarge(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              interval=769,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 10, 4, 10, 0),
-                          datetime(1997, 11, 5, 11, 0)])
-
-    def testHourlyByMonth(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 1, 0),
-                          datetime(1998, 1, 1, 2, 0)])
-
-    def testHourlyByMonthDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 0, 0),
-                          datetime(1997, 9, 3, 1, 0),
-                          datetime(1997, 9, 3, 2, 0)])
-
-    def testHourlyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 0, 0),
-                          datetime(1998, 1, 5, 1, 0),
-                          datetime(1998, 1, 5, 2, 0)])
-
-    def testHourlyByWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 10, 0),
-                          datetime(1997, 9, 2, 11, 0)])
-
-    def testHourlyByNWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 10, 0),
-                          datetime(1997, 9, 2, 11, 0)])
-
-    def testHourlyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 1, 0),
-                          datetime(1998, 1, 1, 2, 0)])
-
-    def testHourlyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 1, 0),
-                          datetime(1998, 1, 1, 2, 0)])
-
-    def testHourlyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 1, 0),
-                          datetime(1998, 1, 1, 2, 0)])
-
-    def testHourlyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 1, 0),
-                          datetime(1998, 1, 1, 2, 0)])
-
-    def testHourlyByYearDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0),
-                          datetime(1997, 12, 31, 1, 0),
-                          datetime(1997, 12, 31, 2, 0),
-                          datetime(1997, 12, 31, 3, 0)])
-
-    def testHourlyByYearDayNeg(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0),
-                          datetime(1997, 12, 31, 1, 0),
-                          datetime(1997, 12, 31, 2, 0),
-                          datetime(1997, 12, 31, 3, 0)])
-
-    def testHourlyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0),
-                          datetime(1998, 4, 10, 1, 0),
-                          datetime(1998, 4, 10, 2, 0),
-                          datetime(1998, 4, 10, 3, 0)])
-
-    def testHourlyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0),
-                          datetime(1998, 4, 10, 1, 0),
-                          datetime(1998, 4, 10, 2, 0),
-                          datetime(1998, 4, 10, 3, 0)])
-
-    def testHourlyByWeekNo(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 0, 0),
-                          datetime(1998, 5, 11, 1, 0),
-                          datetime(1998, 5, 11, 2, 0)])
-
-    def testHourlyByWeekNoAndWeekDay(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 0, 0),
-                          datetime(1997, 12, 29, 1, 0),
-                          datetime(1997, 12, 29, 2, 0)])
-
-    def testHourlyByWeekNoAndWeekDayLarge(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0),
-                          datetime(1997, 12, 28, 1, 0),
-                          datetime(1997, 12, 28, 2, 0)])
-
-    def testHourlyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0),
-                          datetime(1997, 12, 28, 1, 0),
-                          datetime(1997, 12, 28, 2, 0)])
-
-    def testHourlyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 0, 0),
-                          datetime(1998, 12, 28, 1, 0),
-                          datetime(1998, 12, 28, 2, 0)])
-
-    def testHourlyByEaster(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 0, 0),
-                          datetime(1998, 4, 12, 1, 0),
-                          datetime(1998, 4, 12, 2, 0)])
-
-    def testHourlyByEasterPos(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 0, 0),
-                          datetime(1998, 4, 13, 1, 0),
-                          datetime(1998, 4, 13, 2, 0)])
-
-    def testHourlyByEasterNeg(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 0, 0),
-                          datetime(1998, 4, 11, 1, 0),
-                          datetime(1998, 4, 11, 2, 0)])
-
-    def testHourlyByHour(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 9, 3, 6, 0),
-                          datetime(1997, 9, 3, 18, 0)])
-
-    def testHourlyByMinute(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1997, 9, 2, 10, 6)])
-
-    def testHourlyBySecond(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 9, 2, 10, 0, 6)])
-
-    def testHourlyByHourAndMinute(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1997, 9, 3, 6, 6)])
-
-    def testHourlyByHourAndSecond(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 9, 3, 6, 0, 6)])
-
-    def testHourlyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testHourlyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testHourlyBySetPos(self):
-        self.assertEqual(list(rrule(HOURLY,
-                              count=3,
-                              byminute=(15, 45),
-                              bysecond=(15, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 15, 45),
-                          datetime(1997, 9, 2, 9, 45, 15),
-                          datetime(1997, 9, 2, 10, 15, 45)])
-
-    def testMinutely(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 9, 1),
-                          datetime(1997, 9, 2, 9, 2)])
-
-    def testMinutelyInterval(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 9, 2),
-                          datetime(1997, 9, 2, 9, 4)])
-
-    def testMinutelyIntervalLarge(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              interval=1501,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 10, 1),
-                          datetime(1997, 9, 4, 11, 2)])
-
-    def testMinutelyByMonth(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 0, 1),
-                          datetime(1998, 1, 1, 0, 2)])
-
-    def testMinutelyByMonthDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 0, 0),
-                          datetime(1997, 9, 3, 0, 1),
-                          datetime(1997, 9, 3, 0, 2)])
-
-    def testMinutelyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 0, 0),
-                          datetime(1998, 1, 5, 0, 1),
-                          datetime(1998, 1, 5, 0, 2)])
-
-    def testMinutelyByWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 9, 1),
-                          datetime(1997, 9, 2, 9, 2)])
-
-    def testMinutelyByNWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 2, 9, 1),
-                          datetime(1997, 9, 2, 9, 2)])
-
-    def testMinutelyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 0, 1),
-                          datetime(1998, 1, 1, 0, 2)])
-
-    def testMinutelyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 0, 1),
-                          datetime(1998, 1, 1, 0, 2)])
-
-    def testMinutelyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 0, 1),
-                          datetime(1998, 1, 1, 0, 2)])
-
-    def testMinutelyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0),
-                          datetime(1998, 1, 1, 0, 1),
-                          datetime(1998, 1, 1, 0, 2)])
-
-    def testMinutelyByYearDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0),
-                          datetime(1997, 12, 31, 0, 1),
-                          datetime(1997, 12, 31, 0, 2),
-                          datetime(1997, 12, 31, 0, 3)])
-
-    def testMinutelyByYearDayNeg(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0),
-                          datetime(1997, 12, 31, 0, 1),
-                          datetime(1997, 12, 31, 0, 2),
-                          datetime(1997, 12, 31, 0, 3)])
-
-    def testMinutelyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0),
-                          datetime(1998, 4, 10, 0, 1),
-                          datetime(1998, 4, 10, 0, 2),
-                          datetime(1998, 4, 10, 0, 3)])
-
-    def testMinutelyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0),
-                          datetime(1998, 4, 10, 0, 1),
-                          datetime(1998, 4, 10, 0, 2),
-                          datetime(1998, 4, 10, 0, 3)])
-
-    def testMinutelyByWeekNo(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 0, 0),
-                          datetime(1998, 5, 11, 0, 1),
-                          datetime(1998, 5, 11, 0, 2)])
-
-    def testMinutelyByWeekNoAndWeekDay(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 0, 0),
-                          datetime(1997, 12, 29, 0, 1),
-                          datetime(1997, 12, 29, 0, 2)])
-
-    def testMinutelyByWeekNoAndWeekDayLarge(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0),
-                          datetime(1997, 12, 28, 0, 1),
-                          datetime(1997, 12, 28, 0, 2)])
-
-    def testMinutelyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0),
-                          datetime(1997, 12, 28, 0, 1),
-                          datetime(1997, 12, 28, 0, 2)])
-
-    def testMinutelyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 0, 0),
-                          datetime(1998, 12, 28, 0, 1),
-                          datetime(1998, 12, 28, 0, 2)])
-
-    def testMinutelyByEaster(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 0, 0),
-                          datetime(1998, 4, 12, 0, 1),
-                          datetime(1998, 4, 12, 0, 2)])
-
-    def testMinutelyByEasterPos(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 0, 0),
-                          datetime(1998, 4, 13, 0, 1),
-                          datetime(1998, 4, 13, 0, 2)])
-
-    def testMinutelyByEasterNeg(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 0, 0),
-                          datetime(1998, 4, 11, 0, 1),
-                          datetime(1998, 4, 11, 0, 2)])
-
-    def testMinutelyByHour(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0),
-                          datetime(1997, 9, 2, 18, 1),
-                          datetime(1997, 9, 2, 18, 2)])
-
-    def testMinutelyByMinute(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6),
-                          datetime(1997, 9, 2, 9, 18),
-                          datetime(1997, 9, 2, 10, 6)])
-
-    def testMinutelyBySecond(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 9, 2, 9, 1, 6)])
-
-    def testMinutelyByHourAndMinute(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6),
-                          datetime(1997, 9, 2, 18, 18),
-                          datetime(1997, 9, 3, 6, 6)])
-
-    def testMinutelyByHourAndSecond(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 9, 2, 18, 1, 6)])
-
-    def testMinutelyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testMinutelyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testMinutelyBySetPos(self):
-        self.assertEqual(list(rrule(MINUTELY,
-                              count=3,
-                              bysecond=(15, 30, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 15),
-                          datetime(1997, 9, 2, 9, 0, 45),
-                          datetime(1997, 9, 2, 9, 1, 15)])
-
-    def testSecondly(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 0),
-                          datetime(1997, 9, 2, 9, 0, 1),
-                          datetime(1997, 9, 2, 9, 0, 2)])
-
-    def testSecondlyInterval(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 0),
-                          datetime(1997, 9, 2, 9, 0, 2),
-                          datetime(1997, 9, 2, 9, 0, 4)])
-
-    def testSecondlyIntervalLarge(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              interval=90061,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 0),
-                          datetime(1997, 9, 3, 10, 1, 1),
-                          datetime(1997, 9, 4, 11, 2, 2)])
-
-    def testSecondlyByMonth(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0, 0),
-                          datetime(1998, 1, 1, 0, 0, 1),
-                          datetime(1998, 1, 1, 0, 0, 2)])
-
-    def testSecondlyByMonthDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 3, 0, 0, 0),
-                          datetime(1997, 9, 3, 0, 0, 1),
-                          datetime(1997, 9, 3, 0, 0, 2)])
-
-    def testSecondlyByMonthAndMonthDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 5, 0, 0, 0),
-                          datetime(1998, 1, 5, 0, 0, 1),
-                          datetime(1998, 1, 5, 0, 0, 2)])
-
-    def testSecondlyByWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 0),
-                          datetime(1997, 9, 2, 9, 0, 1),
-                          datetime(1997, 9, 2, 9, 0, 2)])
-
-    def testSecondlyByNWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 0),
-                          datetime(1997, 9, 2, 9, 0, 1),
-                          datetime(1997, 9, 2, 9, 0, 2)])
-
-    def testSecondlyByMonthAndWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0, 0),
-                          datetime(1998, 1, 1, 0, 0, 1),
-                          datetime(1998, 1, 1, 0, 0, 2)])
-
-    def testSecondlyByMonthAndNWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0, 0),
-                          datetime(1998, 1, 1, 0, 0, 1),
-                          datetime(1998, 1, 1, 0, 0, 2)])
-
-    def testSecondlyByMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0, 0),
-                          datetime(1998, 1, 1, 0, 0, 1),
-                          datetime(1998, 1, 1, 0, 0, 2)])
-
-    def testSecondlyByMonthAndMonthDayAndWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 1, 1, 0, 0, 0),
-                          datetime(1998, 1, 1, 0, 0, 1),
-                          datetime(1998, 1, 1, 0, 0, 2)])
-
-    def testSecondlyByYearDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0, 0),
-                          datetime(1997, 12, 31, 0, 0, 1),
-                          datetime(1997, 12, 31, 0, 0, 2),
-                          datetime(1997, 12, 31, 0, 0, 3)])
-
-    def testSecondlyByYearDayNeg(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 31, 0, 0, 0),
-                          datetime(1997, 12, 31, 0, 0, 1),
-                          datetime(1997, 12, 31, 0, 0, 2),
-                          datetime(1997, 12, 31, 0, 0, 3)])
-
-    def testSecondlyByMonthAndYearDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0, 0),
-                          datetime(1998, 4, 10, 0, 0, 1),
-                          datetime(1998, 4, 10, 0, 0, 2),
-                          datetime(1998, 4, 10, 0, 0, 3)])
-
-    def testSecondlyByMonthAndYearDayNeg(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 10, 0, 0, 0),
-                          datetime(1998, 4, 10, 0, 0, 1),
-                          datetime(1998, 4, 10, 0, 0, 2),
-                          datetime(1998, 4, 10, 0, 0, 3)])
-
-    def testSecondlyByWeekNo(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 5, 11, 0, 0, 0),
-                          datetime(1998, 5, 11, 0, 0, 1),
-                          datetime(1998, 5, 11, 0, 0, 2)])
-
-    def testSecondlyByWeekNoAndWeekDay(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 29, 0, 0, 0),
-                          datetime(1997, 12, 29, 0, 0, 1),
-                          datetime(1997, 12, 29, 0, 0, 2)])
-
-    def testSecondlyByWeekNoAndWeekDayLarge(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0, 0),
-                          datetime(1997, 12, 28, 0, 0, 1),
-                          datetime(1997, 12, 28, 0, 0, 2)])
-
-    def testSecondlyByWeekNoAndWeekDayLast(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 12, 28, 0, 0, 0),
-                          datetime(1997, 12, 28, 0, 0, 1),
-                          datetime(1997, 12, 28, 0, 0, 2)])
-
-    def testSecondlyByWeekNoAndWeekDay53(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 12, 28, 0, 0, 0),
-                          datetime(1998, 12, 28, 0, 0, 1),
-                          datetime(1998, 12, 28, 0, 0, 2)])
-
-    def testSecondlyByEaster(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 12, 0, 0, 0),
-                          datetime(1998, 4, 12, 0, 0, 1),
-                          datetime(1998, 4, 12, 0, 0, 2)])
-
-    def testSecondlyByEasterPos(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 13, 0, 0, 0),
-                          datetime(1998, 4, 13, 0, 0, 1),
-                          datetime(1998, 4, 13, 0, 0, 2)])
-
-    def testSecondlyByEasterNeg(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1998, 4, 11, 0, 0, 0),
-                          datetime(1998, 4, 11, 0, 0, 1),
-                          datetime(1998, 4, 11, 0, 0, 2)])
-
-    def testSecondlyByHour(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 0),
-                          datetime(1997, 9, 2, 18, 0, 1),
-                          datetime(1997, 9, 2, 18, 0, 2)])
-
-    def testSecondlyByMinute(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 0),
-                          datetime(1997, 9, 2, 9, 6, 1),
-                          datetime(1997, 9, 2, 9, 6, 2)])
-
-    def testSecondlyBySecond(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0, 6),
-                          datetime(1997, 9, 2, 9, 0, 18),
-                          datetime(1997, 9, 2, 9, 1, 6)])
-
-    def testSecondlyByHourAndMinute(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 0),
-                          datetime(1997, 9, 2, 18, 6, 1),
-                          datetime(1997, 9, 2, 18, 6, 2)])
-
-    def testSecondlyByHourAndSecond(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 0, 6),
-                          datetime(1997, 9, 2, 18, 0, 18),
-                          datetime(1997, 9, 2, 18, 1, 6)])
-
-    def testSecondlyByMinuteAndSecond(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 6, 6),
-                          datetime(1997, 9, 2, 9, 6, 18),
-                          datetime(1997, 9, 2, 9, 18, 6)])
-
-    def testSecondlyByHourAndMinuteAndSecond(self):
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 18, 6, 6),
-                          datetime(1997, 9, 2, 18, 6, 18),
-                          datetime(1997, 9, 2, 18, 18, 6)])
-
-    def testSecondlyByHourAndMinuteAndSecondBug(self):
-        # This explores a bug found by Mathieu Bridon.
-        self.assertEqual(list(rrule(SECONDLY,
-                              count=3,
-                              bysecond=(0,),
-                              byminute=(1,),
-                              dtstart=datetime(2010, 3, 22, 12, 1))),
-                         [datetime(2010, 3, 22, 12, 1),
-                          datetime(2010, 3, 22, 13, 1),
-                          datetime(2010, 3, 22, 14, 1)])
-
-    def testLongIntegers(self):
+    def _rrulestr_reverse_test(self, rule): 
+        """ 
+        Call with an `rrule` and it will test that `str(rrule)` generates a 
+        string which generates the same `rrule` as the input when passed to 
+        `rrulestr()` 
+        """ 
+        rr_str = str(rule) 
+        rrulestr_rrule = rrulestr(rr_str) 
+ 
+        self.assertEqual(list(rule), list(rrulestr_rrule)) 
+ 
+    def testStrAppendRRULEToken(self): 
+        # `_rrulestr_reverse_test` does not check if the "RRULE:" prefix 
+        # property is appended properly, so give it a dedicated test 
+        self.assertEqual(str(rrule(YEARLY, 
+                             count=5, 
+                             dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         "DTSTART:19970902T090000\n" 
+                         "RRULE:FREQ=YEARLY;COUNT=5") 
+ 
+        rr_str = ( 
+          'DTSTART:19970105T083000\nRRULE:FREQ=YEARLY;INTERVAL=2' 
+        ) 
+        self.assertEqual(str(rrulestr(rr_str)), rr_str) 
+ 
+    def testYearly(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testYearlyInterval(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0), 
+                          datetime(2001, 9, 2, 9, 0)]) 
+ 
+    def testYearlyIntervalLarge(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              interval=100, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(2097, 9, 2, 9, 0), 
+                          datetime(2197, 9, 2, 9, 0)]) 
+ 
+    def testYearlyByMonth(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 2, 9, 0), 
+                          datetime(1998, 3, 2, 9, 0), 
+                          datetime(1999, 1, 2, 9, 0)]) 
+ 
+    def testYearlyByMonthDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 10, 1, 9, 0), 
+                          datetime(1997, 10, 3, 9, 0)]) 
+ 
+    def testYearlyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 9, 0), 
+                          datetime(1998, 1, 7, 9, 0), 
+                          datetime(1998, 3, 5, 9, 0)]) 
+ 
+    def testYearlyByWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testYearlyByNWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 25, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 12, 31, 9, 0)]) 
+ 
+    def testYearlyByNWeekDayLarge(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 11, 9, 0), 
+                          datetime(1998, 1, 20, 9, 0), 
+                          datetime(1998, 12, 17, 9, 0)]) 
+ 
+    def testYearlyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testYearlyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 29, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testYearlyByMonthAndNWeekDayLarge(self): 
+        # This is interesting because the TH(-3) ends up before 
+        # the TU(3). 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 15, 9, 0), 
+                          datetime(1998, 1, 20, 9, 0), 
+                          datetime(1998, 3, 12, 9, 0)]) 
+ 
+    def testYearlyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 2, 3, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testYearlyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0), 
+                          datetime(2001, 3, 1, 9, 0)]) 
+ 
+    def testYearlyByYearDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testYearlyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testYearlyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 4, 10, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testYearlyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 4, 10, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testYearlyByWeekNo(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 9, 0), 
+                          datetime(1998, 5, 12, 9, 0), 
+                          datetime(1998, 5, 13, 9, 0)]) 
+ 
+    def testYearlyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 9, 0), 
+                          datetime(1999, 1, 4, 9, 0), 
+                          datetime(2000, 1, 3, 9, 0)]) 
+ 
+    def testYearlyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1998, 12, 27, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testYearlyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1999, 1, 3, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testYearlyByEaster(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 9, 0), 
+                          datetime(1999, 4, 4, 9, 0), 
+                          datetime(2000, 4, 23, 9, 0)]) 
+ 
+    def testYearlyByEasterPos(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 9, 0), 
+                          datetime(1999, 4, 5, 9, 0), 
+                          datetime(2000, 4, 24, 9, 0)]) 
+ 
+    def testYearlyByEasterNeg(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 9, 0), 
+                          datetime(1999, 4, 3, 9, 0), 
+                          datetime(2000, 4, 22, 9, 0)]) 
+ 
+    def testYearlyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 9, 0), 
+                          datetime(2004, 12, 27, 9, 0), 
+                          datetime(2009, 12, 28, 9, 0)]) 
+ 
+    def testYearlyByHour(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1998, 9, 2, 6, 0), 
+                          datetime(1998, 9, 2, 18, 0)]) 
+ 
+    def testYearlyByMinute(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1998, 9, 2, 9, 6)]) 
+ 
+    def testYearlyBySecond(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1998, 9, 2, 9, 0, 6)]) 
+ 
+    def testYearlyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1998, 9, 2, 6, 6)]) 
+ 
+    def testYearlyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1998, 9, 2, 6, 0, 6)]) 
+ 
+    def testYearlyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testYearlyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testYearlyBySetPos(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonthday=15, 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 11, 15, 18, 0), 
+                          datetime(1998, 2, 15, 6, 0), 
+                          datetime(1998, 11, 15, 18, 0)]) 
+ 
+    def testMonthly(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 10, 2, 9, 0), 
+                          datetime(1997, 11, 2, 9, 0)]) 
+ 
+    def testMonthlyInterval(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 11, 2, 9, 0), 
+                          datetime(1998, 1, 2, 9, 0)]) 
+ 
+    def testMonthlyIntervalLarge(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              interval=18, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1999, 3, 2, 9, 0), 
+                          datetime(2000, 9, 2, 9, 0)]) 
+ 
+    def testMonthlyByMonth(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 2, 9, 0), 
+                          datetime(1998, 3, 2, 9, 0), 
+                          datetime(1999, 1, 2, 9, 0)]) 
+ 
+    def testMonthlyByMonthDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 10, 1, 9, 0), 
+                          datetime(1997, 10, 3, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 9, 0), 
+                          datetime(1998, 1, 7, 9, 0), 
+                          datetime(1998, 3, 5, 9, 0)]) 
+ 
+    def testMonthlyByWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+        # Third Monday of the month 
+        self.assertEqual(rrule(MONTHLY, 
+                         byweekday=(MO(+3)), 
+                         dtstart=datetime(1997, 9, 1)).between(datetime(1997, 9, 1), 
+                                                               datetime(1997, 12, 1)), 
+                         [datetime(1997, 9, 15, 0, 0), 
+                          datetime(1997, 10, 20, 0, 0), 
+                          datetime(1997, 11, 17, 0, 0)]) 
+ 
+    def testMonthlyByNWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 25, 9, 0), 
+                          datetime(1997, 10, 7, 9, 0)]) 
+ 
+    def testMonthlyByNWeekDayLarge(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 11, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0), 
+                          datetime(1997, 10, 16, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 29, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndNWeekDayLarge(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 15, 9, 0), 
+                          datetime(1998, 1, 20, 9, 0), 
+                          datetime(1998, 3, 12, 9, 0)]) 
+ 
+    def testMonthlyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 2, 3, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0), 
+                          datetime(2001, 3, 1, 9, 0)]) 
+ 
+    def testMonthlyByYearDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testMonthlyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 4, 10, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testMonthlyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 4, 10, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testMonthlyByWeekNo(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 9, 0), 
+                          datetime(1998, 5, 12, 9, 0), 
+                          datetime(1998, 5, 13, 9, 0)]) 
+ 
+    def testMonthlyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 9, 0), 
+                          datetime(1999, 1, 4, 9, 0), 
+                          datetime(2000, 1, 3, 9, 0)]) 
+ 
+    def testMonthlyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1998, 12, 27, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testMonthlyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1999, 1, 3, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testMonthlyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 9, 0), 
+                          datetime(2004, 12, 27, 9, 0), 
+                          datetime(2009, 12, 28, 9, 0)]) 
+ 
+    def testMonthlyByEaster(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 9, 0), 
+                          datetime(1999, 4, 4, 9, 0), 
+                          datetime(2000, 4, 23, 9, 0)]) 
+ 
+    def testMonthlyByEasterPos(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 9, 0), 
+                          datetime(1999, 4, 5, 9, 0), 
+                          datetime(2000, 4, 24, 9, 0)]) 
+ 
+    def testMonthlyByEasterNeg(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 9, 0), 
+                          datetime(1999, 4, 3, 9, 0), 
+                          datetime(2000, 4, 22, 9, 0)]) 
+ 
+    def testMonthlyByHour(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 10, 2, 6, 0), 
+                          datetime(1997, 10, 2, 18, 0)]) 
+ 
+    def testMonthlyByMinute(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1997, 10, 2, 9, 6)]) 
+ 
+    def testMonthlyBySecond(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 10, 2, 9, 0, 6)]) 
+ 
+    def testMonthlyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1997, 10, 2, 6, 6)]) 
+ 
+    def testMonthlyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 10, 2, 6, 0, 6)]) 
+ 
+    def testMonthlyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testMonthlyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testMonthlyBySetPos(self): 
+        self.assertEqual(list(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(13, 17), 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 13, 18, 0), 
+                          datetime(1997, 9, 17, 6, 0), 
+                          datetime(1997, 10, 13, 18, 0)]) 
+ 
+    def testWeekly(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testWeeklyInterval(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0), 
+                          datetime(1997, 9, 30, 9, 0)]) 
+ 
+    def testWeeklyIntervalLarge(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              interval=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 1, 20, 9, 0), 
+                          datetime(1998, 6, 9, 9, 0)]) 
+ 
+    def testWeeklyByMonth(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 13, 9, 0), 
+                          datetime(1998, 1, 20, 9, 0)]) 
+ 
+    def testWeeklyByMonthDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 10, 1, 9, 0), 
+                          datetime(1997, 10, 3, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 9, 0), 
+                          datetime(1998, 1, 7, 9, 0), 
+                          datetime(1998, 3, 5, 9, 0)]) 
+ 
+    def testWeeklyByWeekDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testWeeklyByNWeekDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndWeekDay(self): 
+        # This test is interesting, because it crosses the year 
+        # boundary in a weekly period to find day '1' as a 
+        # valid recurrence. 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testWeeklyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 2, 3, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0), 
+                          datetime(2001, 3, 1, 9, 0)]) 
+ 
+    def testWeeklyByYearDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testWeeklyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 1, 1, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testWeeklyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 1, 1, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testWeeklyByWeekNo(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 9, 0), 
+                          datetime(1998, 5, 12, 9, 0), 
+                          datetime(1998, 5, 13, 9, 0)]) 
+ 
+    def testWeeklyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 9, 0), 
+                          datetime(1999, 1, 4, 9, 0), 
+                          datetime(2000, 1, 3, 9, 0)]) 
+ 
+    def testWeeklyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1998, 12, 27, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testWeeklyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1999, 1, 3, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testWeeklyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 9, 0), 
+                          datetime(2004, 12, 27, 9, 0), 
+                          datetime(2009, 12, 28, 9, 0)]) 
+ 
+    def testWeeklyByEaster(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 9, 0), 
+                          datetime(1999, 4, 4, 9, 0), 
+                          datetime(2000, 4, 23, 9, 0)]) 
+ 
+    def testWeeklyByEasterPos(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 9, 0), 
+                          datetime(1999, 4, 5, 9, 0), 
+                          datetime(2000, 4, 24, 9, 0)]) 
+ 
+    def testWeeklyByEasterNeg(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 9, 0), 
+                          datetime(1999, 4, 3, 9, 0), 
+                          datetime(2000, 4, 22, 9, 0)]) 
+ 
+    def testWeeklyByHour(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 9, 9, 6, 0), 
+                          datetime(1997, 9, 9, 18, 0)]) 
+ 
+    def testWeeklyByMinute(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1997, 9, 9, 9, 6)]) 
+ 
+    def testWeeklyBySecond(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 9, 9, 9, 0, 6)]) 
+ 
+    def testWeeklyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1997, 9, 9, 6, 6)]) 
+ 
+    def testWeeklyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 9, 9, 6, 0, 6)]) 
+ 
+    def testWeeklyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testWeeklyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testWeeklyBySetPos(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 9, 4, 6, 0), 
+                          datetime(1997, 9, 9, 18, 0)]) 
+ 
+    def testDaily(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testDailyInterval(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 6, 9, 0)]) 
+ 
+    def testDailyIntervalLarge(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              interval=92, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 12, 3, 9, 0), 
+                          datetime(1998, 3, 5, 9, 0)]) 
+ 
+    def testDailyByMonth(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 2, 9, 0), 
+                          datetime(1998, 1, 3, 9, 0)]) 
+ 
+    def testDailyByMonthDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 10, 1, 9, 0), 
+                          datetime(1997, 10, 3, 9, 0)]) 
+ 
+    def testDailyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 9, 0), 
+                          datetime(1998, 1, 7, 9, 0), 
+                          datetime(1998, 3, 5, 9, 0)]) 
+ 
+    def testDailyByWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testDailyByNWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testDailyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testDailyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 1, 8, 9, 0)]) 
+ 
+    def testDailyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 2, 3, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0)]) 
+ 
+    def testDailyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 3, 3, 9, 0), 
+                          datetime(2001, 3, 1, 9, 0)]) 
+ 
+    def testDailyByYearDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testDailyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 9, 0), 
+                          datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 4, 10, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0)]) 
+ 
+    def testDailyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 1, 1, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testDailyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 9, 0), 
+                          datetime(1998, 7, 19, 9, 0), 
+                          datetime(1999, 1, 1, 9, 0), 
+                          datetime(1999, 7, 19, 9, 0)]) 
+ 
+    def testDailyByWeekNo(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 9, 0), 
+                          datetime(1998, 5, 12, 9, 0), 
+                          datetime(1998, 5, 13, 9, 0)]) 
+ 
+    def testDailyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 9, 0), 
+                          datetime(1999, 1, 4, 9, 0), 
+                          datetime(2000, 1, 3, 9, 0)]) 
+ 
+    def testDailyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1998, 12, 27, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testDailyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 9, 0), 
+                          datetime(1999, 1, 3, 9, 0), 
+                          datetime(2000, 1, 2, 9, 0)]) 
+ 
+    def testDailyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 9, 0), 
+                          datetime(2004, 12, 27, 9, 0), 
+                          datetime(2009, 12, 28, 9, 0)]) 
+ 
+    def testDailyByEaster(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 9, 0), 
+                          datetime(1999, 4, 4, 9, 0), 
+                          datetime(2000, 4, 23, 9, 0)]) 
+ 
+    def testDailyByEasterPos(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 9, 0), 
+                          datetime(1999, 4, 5, 9, 0), 
+                          datetime(2000, 4, 24, 9, 0)]) 
+ 
+    def testDailyByEasterNeg(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 9, 0), 
+                          datetime(1999, 4, 3, 9, 0), 
+                          datetime(2000, 4, 22, 9, 0)]) 
+ 
+    def testDailyByHour(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 9, 3, 6, 0), 
+                          datetime(1997, 9, 3, 18, 0)]) 
+ 
+    def testDailyByMinute(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1997, 9, 3, 9, 6)]) 
+ 
+    def testDailyBySecond(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 9, 3, 9, 0, 6)]) 
+ 
+    def testDailyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1997, 9, 3, 6, 6)]) 
+ 
+    def testDailyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 9, 3, 6, 0, 6)]) 
+ 
+    def testDailyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testDailyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testDailyBySetPos(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(15, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 15), 
+                          datetime(1997, 9, 3, 6, 45), 
+                          datetime(1997, 9, 3, 18, 15)]) 
+ 
+    def testHourly(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 10, 0), 
+                          datetime(1997, 9, 2, 11, 0)]) 
+ 
+    def testHourlyInterval(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 11, 0), 
+                          datetime(1997, 9, 2, 13, 0)]) 
+ 
+    def testHourlyIntervalLarge(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              interval=769, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 10, 4, 10, 0), 
+                          datetime(1997, 11, 5, 11, 0)]) 
+ 
+    def testHourlyByMonth(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 1, 0), 
+                          datetime(1998, 1, 1, 2, 0)]) 
+ 
+    def testHourlyByMonthDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 0, 0), 
+                          datetime(1997, 9, 3, 1, 0), 
+                          datetime(1997, 9, 3, 2, 0)]) 
+ 
+    def testHourlyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 0, 0), 
+                          datetime(1998, 1, 5, 1, 0), 
+                          datetime(1998, 1, 5, 2, 0)]) 
+ 
+    def testHourlyByWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 10, 0), 
+                          datetime(1997, 9, 2, 11, 0)]) 
+ 
+    def testHourlyByNWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 10, 0), 
+                          datetime(1997, 9, 2, 11, 0)]) 
+ 
+    def testHourlyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 1, 0), 
+                          datetime(1998, 1, 1, 2, 0)]) 
+ 
+    def testHourlyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 1, 0), 
+                          datetime(1998, 1, 1, 2, 0)]) 
+ 
+    def testHourlyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 1, 0), 
+                          datetime(1998, 1, 1, 2, 0)]) 
+ 
+    def testHourlyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 1, 0), 
+                          datetime(1998, 1, 1, 2, 0)]) 
+ 
+    def testHourlyByYearDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0), 
+                          datetime(1997, 12, 31, 1, 0), 
+                          datetime(1997, 12, 31, 2, 0), 
+                          datetime(1997, 12, 31, 3, 0)]) 
+ 
+    def testHourlyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0), 
+                          datetime(1997, 12, 31, 1, 0), 
+                          datetime(1997, 12, 31, 2, 0), 
+                          datetime(1997, 12, 31, 3, 0)]) 
+ 
+    def testHourlyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0), 
+                          datetime(1998, 4, 10, 1, 0), 
+                          datetime(1998, 4, 10, 2, 0), 
+                          datetime(1998, 4, 10, 3, 0)]) 
+ 
+    def testHourlyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0), 
+                          datetime(1998, 4, 10, 1, 0), 
+                          datetime(1998, 4, 10, 2, 0), 
+                          datetime(1998, 4, 10, 3, 0)]) 
+ 
+    def testHourlyByWeekNo(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 0, 0), 
+                          datetime(1998, 5, 11, 1, 0), 
+                          datetime(1998, 5, 11, 2, 0)]) 
+ 
+    def testHourlyByWeekNoAndWeekDay(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 0, 0), 
+                          datetime(1997, 12, 29, 1, 0), 
+                          datetime(1997, 12, 29, 2, 0)]) 
+ 
+    def testHourlyByWeekNoAndWeekDayLarge(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0), 
+                          datetime(1997, 12, 28, 1, 0), 
+                          datetime(1997, 12, 28, 2, 0)]) 
+ 
+    def testHourlyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0), 
+                          datetime(1997, 12, 28, 1, 0), 
+                          datetime(1997, 12, 28, 2, 0)]) 
+ 
+    def testHourlyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 0, 0), 
+                          datetime(1998, 12, 28, 1, 0), 
+                          datetime(1998, 12, 28, 2, 0)]) 
+ 
+    def testHourlyByEaster(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 0, 0), 
+                          datetime(1998, 4, 12, 1, 0), 
+                          datetime(1998, 4, 12, 2, 0)]) 
+ 
+    def testHourlyByEasterPos(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 0, 0), 
+                          datetime(1998, 4, 13, 1, 0), 
+                          datetime(1998, 4, 13, 2, 0)]) 
+ 
+    def testHourlyByEasterNeg(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 0, 0), 
+                          datetime(1998, 4, 11, 1, 0), 
+                          datetime(1998, 4, 11, 2, 0)]) 
+ 
+    def testHourlyByHour(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 9, 3, 6, 0), 
+                          datetime(1997, 9, 3, 18, 0)]) 
+ 
+    def testHourlyByMinute(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1997, 9, 2, 10, 6)]) 
+ 
+    def testHourlyBySecond(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 9, 2, 10, 0, 6)]) 
+ 
+    def testHourlyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1997, 9, 3, 6, 6)]) 
+ 
+    def testHourlyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 9, 3, 6, 0, 6)]) 
+ 
+    def testHourlyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testHourlyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testHourlyBySetPos(self): 
+        self.assertEqual(list(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(15, 45), 
+                              bysecond=(15, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 15, 45), 
+                          datetime(1997, 9, 2, 9, 45, 15), 
+                          datetime(1997, 9, 2, 10, 15, 45)]) 
+ 
+    def testMinutely(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 9, 1), 
+                          datetime(1997, 9, 2, 9, 2)]) 
+ 
+    def testMinutelyInterval(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 9, 2), 
+                          datetime(1997, 9, 2, 9, 4)]) 
+ 
+    def testMinutelyIntervalLarge(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              interval=1501, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 10, 1), 
+                          datetime(1997, 9, 4, 11, 2)]) 
+ 
+    def testMinutelyByMonth(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 0, 1), 
+                          datetime(1998, 1, 1, 0, 2)]) 
+ 
+    def testMinutelyByMonthDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 0, 0), 
+                          datetime(1997, 9, 3, 0, 1), 
+                          datetime(1997, 9, 3, 0, 2)]) 
+ 
+    def testMinutelyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 0, 0), 
+                          datetime(1998, 1, 5, 0, 1), 
+                          datetime(1998, 1, 5, 0, 2)]) 
+ 
+    def testMinutelyByWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 9, 1), 
+                          datetime(1997, 9, 2, 9, 2)]) 
+ 
+    def testMinutelyByNWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 2, 9, 1), 
+                          datetime(1997, 9, 2, 9, 2)]) 
+ 
+    def testMinutelyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 0, 1), 
+                          datetime(1998, 1, 1, 0, 2)]) 
+ 
+    def testMinutelyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 0, 1), 
+                          datetime(1998, 1, 1, 0, 2)]) 
+ 
+    def testMinutelyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 0, 1), 
+                          datetime(1998, 1, 1, 0, 2)]) 
+ 
+    def testMinutelyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0), 
+                          datetime(1998, 1, 1, 0, 1), 
+                          datetime(1998, 1, 1, 0, 2)]) 
+ 
+    def testMinutelyByYearDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0), 
+                          datetime(1997, 12, 31, 0, 1), 
+                          datetime(1997, 12, 31, 0, 2), 
+                          datetime(1997, 12, 31, 0, 3)]) 
+ 
+    def testMinutelyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0), 
+                          datetime(1997, 12, 31, 0, 1), 
+                          datetime(1997, 12, 31, 0, 2), 
+                          datetime(1997, 12, 31, 0, 3)]) 
+ 
+    def testMinutelyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0), 
+                          datetime(1998, 4, 10, 0, 1), 
+                          datetime(1998, 4, 10, 0, 2), 
+                          datetime(1998, 4, 10, 0, 3)]) 
+ 
+    def testMinutelyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0), 
+                          datetime(1998, 4, 10, 0, 1), 
+                          datetime(1998, 4, 10, 0, 2), 
+                          datetime(1998, 4, 10, 0, 3)]) 
+ 
+    def testMinutelyByWeekNo(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 0, 0), 
+                          datetime(1998, 5, 11, 0, 1), 
+                          datetime(1998, 5, 11, 0, 2)]) 
+ 
+    def testMinutelyByWeekNoAndWeekDay(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 0, 0), 
+                          datetime(1997, 12, 29, 0, 1), 
+                          datetime(1997, 12, 29, 0, 2)]) 
+ 
+    def testMinutelyByWeekNoAndWeekDayLarge(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0), 
+                          datetime(1997, 12, 28, 0, 1), 
+                          datetime(1997, 12, 28, 0, 2)]) 
+ 
+    def testMinutelyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0), 
+                          datetime(1997, 12, 28, 0, 1), 
+                          datetime(1997, 12, 28, 0, 2)]) 
+ 
+    def testMinutelyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 0, 0), 
+                          datetime(1998, 12, 28, 0, 1), 
+                          datetime(1998, 12, 28, 0, 2)]) 
+ 
+    def testMinutelyByEaster(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 0, 0), 
+                          datetime(1998, 4, 12, 0, 1), 
+                          datetime(1998, 4, 12, 0, 2)]) 
+ 
+    def testMinutelyByEasterPos(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 0, 0), 
+                          datetime(1998, 4, 13, 0, 1), 
+                          datetime(1998, 4, 13, 0, 2)]) 
+ 
+    def testMinutelyByEasterNeg(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 0, 0), 
+                          datetime(1998, 4, 11, 0, 1), 
+                          datetime(1998, 4, 11, 0, 2)]) 
+ 
+    def testMinutelyByHour(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0), 
+                          datetime(1997, 9, 2, 18, 1), 
+                          datetime(1997, 9, 2, 18, 2)]) 
+ 
+    def testMinutelyByMinute(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6), 
+                          datetime(1997, 9, 2, 9, 18), 
+                          datetime(1997, 9, 2, 10, 6)]) 
+ 
+    def testMinutelyBySecond(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 9, 2, 9, 1, 6)]) 
+ 
+    def testMinutelyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6), 
+                          datetime(1997, 9, 2, 18, 18), 
+                          datetime(1997, 9, 3, 6, 6)]) 
+ 
+    def testMinutelyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 9, 2, 18, 1, 6)]) 
+ 
+    def testMinutelyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testMinutelyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testMinutelyBySetPos(self): 
+        self.assertEqual(list(rrule(MINUTELY, 
+                              count=3, 
+                              bysecond=(15, 30, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 15), 
+                          datetime(1997, 9, 2, 9, 0, 45), 
+                          datetime(1997, 9, 2, 9, 1, 15)]) 
+ 
+    def testSecondly(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 0), 
+                          datetime(1997, 9, 2, 9, 0, 1), 
+                          datetime(1997, 9, 2, 9, 0, 2)]) 
+ 
+    def testSecondlyInterval(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 0), 
+                          datetime(1997, 9, 2, 9, 0, 2), 
+                          datetime(1997, 9, 2, 9, 0, 4)]) 
+ 
+    def testSecondlyIntervalLarge(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              interval=90061, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 0), 
+                          datetime(1997, 9, 3, 10, 1, 1), 
+                          datetime(1997, 9, 4, 11, 2, 2)]) 
+ 
+    def testSecondlyByMonth(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0, 0), 
+                          datetime(1998, 1, 1, 0, 0, 1), 
+                          datetime(1998, 1, 1, 0, 0, 2)]) 
+ 
+    def testSecondlyByMonthDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 3, 0, 0, 0), 
+                          datetime(1997, 9, 3, 0, 0, 1), 
+                          datetime(1997, 9, 3, 0, 0, 2)]) 
+ 
+    def testSecondlyByMonthAndMonthDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 5, 0, 0, 0), 
+                          datetime(1998, 1, 5, 0, 0, 1), 
+                          datetime(1998, 1, 5, 0, 0, 2)]) 
+ 
+    def testSecondlyByWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 0), 
+                          datetime(1997, 9, 2, 9, 0, 1), 
+                          datetime(1997, 9, 2, 9, 0, 2)]) 
+ 
+    def testSecondlyByNWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 0), 
+                          datetime(1997, 9, 2, 9, 0, 1), 
+                          datetime(1997, 9, 2, 9, 0, 2)]) 
+ 
+    def testSecondlyByMonthAndWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0, 0), 
+                          datetime(1998, 1, 1, 0, 0, 1), 
+                          datetime(1998, 1, 1, 0, 0, 2)]) 
+ 
+    def testSecondlyByMonthAndNWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0, 0), 
+                          datetime(1998, 1, 1, 0, 0, 1), 
+                          datetime(1998, 1, 1, 0, 0, 2)]) 
+ 
+    def testSecondlyByMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0, 0), 
+                          datetime(1998, 1, 1, 0, 0, 1), 
+                          datetime(1998, 1, 1, 0, 0, 2)]) 
+ 
+    def testSecondlyByMonthAndMonthDayAndWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 1, 1, 0, 0, 0), 
+                          datetime(1998, 1, 1, 0, 0, 1), 
+                          datetime(1998, 1, 1, 0, 0, 2)]) 
+ 
+    def testSecondlyByYearDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0, 0), 
+                          datetime(1997, 12, 31, 0, 0, 1), 
+                          datetime(1997, 12, 31, 0, 0, 2), 
+                          datetime(1997, 12, 31, 0, 0, 3)]) 
+ 
+    def testSecondlyByYearDayNeg(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 31, 0, 0, 0), 
+                          datetime(1997, 12, 31, 0, 0, 1), 
+                          datetime(1997, 12, 31, 0, 0, 2), 
+                          datetime(1997, 12, 31, 0, 0, 3)]) 
+ 
+    def testSecondlyByMonthAndYearDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0, 0), 
+                          datetime(1998, 4, 10, 0, 0, 1), 
+                          datetime(1998, 4, 10, 0, 0, 2), 
+                          datetime(1998, 4, 10, 0, 0, 3)]) 
+ 
+    def testSecondlyByMonthAndYearDayNeg(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 10, 0, 0, 0), 
+                          datetime(1998, 4, 10, 0, 0, 1), 
+                          datetime(1998, 4, 10, 0, 0, 2), 
+                          datetime(1998, 4, 10, 0, 0, 3)]) 
+ 
+    def testSecondlyByWeekNo(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 5, 11, 0, 0, 0), 
+                          datetime(1998, 5, 11, 0, 0, 1), 
+                          datetime(1998, 5, 11, 0, 0, 2)]) 
+ 
+    def testSecondlyByWeekNoAndWeekDay(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 29, 0, 0, 0), 
+                          datetime(1997, 12, 29, 0, 0, 1), 
+                          datetime(1997, 12, 29, 0, 0, 2)]) 
+ 
+    def testSecondlyByWeekNoAndWeekDayLarge(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0, 0), 
+                          datetime(1997, 12, 28, 0, 0, 1), 
+                          datetime(1997, 12, 28, 0, 0, 2)]) 
+ 
+    def testSecondlyByWeekNoAndWeekDayLast(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 12, 28, 0, 0, 0), 
+                          datetime(1997, 12, 28, 0, 0, 1), 
+                          datetime(1997, 12, 28, 0, 0, 2)]) 
+ 
+    def testSecondlyByWeekNoAndWeekDay53(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 12, 28, 0, 0, 0), 
+                          datetime(1998, 12, 28, 0, 0, 1), 
+                          datetime(1998, 12, 28, 0, 0, 2)]) 
+ 
+    def testSecondlyByEaster(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 12, 0, 0, 0), 
+                          datetime(1998, 4, 12, 0, 0, 1), 
+                          datetime(1998, 4, 12, 0, 0, 2)]) 
+ 
+    def testSecondlyByEasterPos(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 13, 0, 0, 0), 
+                          datetime(1998, 4, 13, 0, 0, 1), 
+                          datetime(1998, 4, 13, 0, 0, 2)]) 
+ 
+    def testSecondlyByEasterNeg(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1998, 4, 11, 0, 0, 0), 
+                          datetime(1998, 4, 11, 0, 0, 1), 
+                          datetime(1998, 4, 11, 0, 0, 2)]) 
+ 
+    def testSecondlyByHour(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 0), 
+                          datetime(1997, 9, 2, 18, 0, 1), 
+                          datetime(1997, 9, 2, 18, 0, 2)]) 
+ 
+    def testSecondlyByMinute(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 0), 
+                          datetime(1997, 9, 2, 9, 6, 1), 
+                          datetime(1997, 9, 2, 9, 6, 2)]) 
+ 
+    def testSecondlyBySecond(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0, 6), 
+                          datetime(1997, 9, 2, 9, 0, 18), 
+                          datetime(1997, 9, 2, 9, 1, 6)]) 
+ 
+    def testSecondlyByHourAndMinute(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 0), 
+                          datetime(1997, 9, 2, 18, 6, 1), 
+                          datetime(1997, 9, 2, 18, 6, 2)]) 
+ 
+    def testSecondlyByHourAndSecond(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 0, 6), 
+                          datetime(1997, 9, 2, 18, 0, 18), 
+                          datetime(1997, 9, 2, 18, 1, 6)]) 
+ 
+    def testSecondlyByMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 6, 6), 
+                          datetime(1997, 9, 2, 9, 6, 18), 
+                          datetime(1997, 9, 2, 9, 18, 6)]) 
+ 
+    def testSecondlyByHourAndMinuteAndSecond(self): 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 18, 6, 6), 
+                          datetime(1997, 9, 2, 18, 6, 18), 
+                          datetime(1997, 9, 2, 18, 18, 6)]) 
+ 
+    def testSecondlyByHourAndMinuteAndSecondBug(self): 
+        # This explores a bug found by Mathieu Bridon. 
+        self.assertEqual(list(rrule(SECONDLY, 
+                              count=3, 
+                              bysecond=(0,), 
+                              byminute=(1,), 
+                              dtstart=datetime(2010, 3, 22, 12, 1))), 
+                         [datetime(2010, 3, 22, 12, 1), 
+                          datetime(2010, 3, 22, 13, 1), 
+                          datetime(2010, 3, 22, 14, 1)]) 
+ 
+    def testLongIntegers(self): 
         if PY2:  # There are no longs in python3
-            self.assertEqual(list(rrule(MINUTELY,
-                                  count=long(2),
-                                  interval=long(2),
-                                  bymonth=long(2),
-                                  byweekday=long(3),
-                                  byhour=long(6),
-                                  byminute=long(6),
-                                  bysecond=long(6),
-                                  dtstart=datetime(1997, 9, 2, 9, 0))),
-                             [datetime(1998, 2, 5, 6, 6, 6),
-                              datetime(1998, 2, 12, 6, 6, 6)])
-            self.assertEqual(list(rrule(YEARLY,
-                                  count=long(2),
-                                  bymonthday=long(5),
-                                  byweekno=long(2),
-                                  dtstart=datetime(1997, 9, 2, 9, 0))),
-                             [datetime(1998, 1, 5, 9, 0),
-                              datetime(2004, 1, 5, 9, 0)])
-
-    def testHourlyBadRRule(self):
-        """
-        When `byhour` is specified with `freq=HOURLY`, there are certain
-        combinations of `dtstart` and `byhour` which result in an rrule with no
-        valid values.
-
-        See https://github.com/dateutil/dateutil/issues/4
-        """
-
-        self.assertRaises(ValueError, rrule, HOURLY,
-                          **dict(interval=4, byhour=(7, 11, 15, 19),
-                                 dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testMinutelyBadRRule(self):
-        """
-        See :func:`testHourlyBadRRule` for details.
-        """
-
-        self.assertRaises(ValueError, rrule, MINUTELY,
-                          **dict(interval=12, byminute=(10, 11, 25, 39, 50),
-                                 dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testSecondlyBadRRule(self):
-        """
-        See :func:`testHourlyBadRRule` for details.
-        """
-
-        self.assertRaises(ValueError, rrule, SECONDLY,
-                          **dict(interval=10, bysecond=(2, 15, 37, 42, 59),
-                                 dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testMinutelyBadComboRRule(self):
-        """
-        Certain values of :param:`interval` in :class:`rrule`, when combined
-        with certain values of :param:`byhour` create rules which apply to no
-        valid dates. The library should detect this case in the iterator and
-        raise a :exception:`ValueError`.
-        """
-
-        # In Python 2.7 you can use a context manager for this.
-        def make_bad_rrule():
-            list(rrule(MINUTELY, interval=120, byhour=(10, 12, 14, 16),
-                 count=2, dtstart=datetime(1997, 9, 2, 9, 0)))
-
-        self.assertRaises(ValueError, make_bad_rrule)
-
-    def testSecondlyBadComboRRule(self):
-        """
-        See :func:`testMinutelyBadComboRRule' for details.
-        """
-
-        # In Python 2.7 you can use a context manager for this.
-        def make_bad_minute_rrule():
-            list(rrule(SECONDLY, interval=360, byminute=(10, 28, 49),
-                 count=4, dtstart=datetime(1997, 9, 2, 9, 0)))
-
-        def make_bad_hour_rrule():
-            list(rrule(SECONDLY, interval=43200, byhour=(2, 10, 18, 23),
-                 count=4, dtstart=datetime(1997, 9, 2, 9, 0)))
-
-        self.assertRaises(ValueError, make_bad_minute_rrule)
-        self.assertRaises(ValueError, make_bad_hour_rrule)
-
-    def testBadUntilCountRRule(self):
-        """
-        See rfc-5545 3.3.10 - This checks for the deprecation warning, and will
-        eventually check for an error.
-        """
+            self.assertEqual(list(rrule(MINUTELY, 
+                                  count=long(2), 
+                                  interval=long(2), 
+                                  bymonth=long(2), 
+                                  byweekday=long(3), 
+                                  byhour=long(6), 
+                                  byminute=long(6), 
+                                  bysecond=long(6), 
+                                  dtstart=datetime(1997, 9, 2, 9, 0))), 
+                             [datetime(1998, 2, 5, 6, 6, 6), 
+                              datetime(1998, 2, 12, 6, 6, 6)]) 
+            self.assertEqual(list(rrule(YEARLY, 
+                                  count=long(2), 
+                                  bymonthday=long(5), 
+                                  byweekno=long(2), 
+                                  dtstart=datetime(1997, 9, 2, 9, 0))), 
+                             [datetime(1998, 1, 5, 9, 0), 
+                              datetime(2004, 1, 5, 9, 0)]) 
+ 
+    def testHourlyBadRRule(self): 
+        """ 
+        When `byhour` is specified with `freq=HOURLY`, there are certain 
+        combinations of `dtstart` and `byhour` which result in an rrule with no 
+        valid values. 
+ 
+        See https://github.com/dateutil/dateutil/issues/4 
+        """ 
+ 
+        self.assertRaises(ValueError, rrule, HOURLY, 
+                          **dict(interval=4, byhour=(7, 11, 15, 19), 
+                                 dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testMinutelyBadRRule(self): 
+        """ 
+        See :func:`testHourlyBadRRule` for details. 
+        """ 
+ 
+        self.assertRaises(ValueError, rrule, MINUTELY, 
+                          **dict(interval=12, byminute=(10, 11, 25, 39, 50), 
+                                 dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testSecondlyBadRRule(self): 
+        """ 
+        See :func:`testHourlyBadRRule` for details. 
+        """ 
+ 
+        self.assertRaises(ValueError, rrule, SECONDLY, 
+                          **dict(interval=10, bysecond=(2, 15, 37, 42, 59), 
+                                 dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testMinutelyBadComboRRule(self): 
+        """ 
+        Certain values of :param:`interval` in :class:`rrule`, when combined 
+        with certain values of :param:`byhour` create rules which apply to no 
+        valid dates. The library should detect this case in the iterator and 
+        raise a :exception:`ValueError`. 
+        """ 
+ 
+        # In Python 2.7 you can use a context manager for this. 
+        def make_bad_rrule(): 
+            list(rrule(MINUTELY, interval=120, byhour=(10, 12, 14, 16), 
+                 count=2, dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+        self.assertRaises(ValueError, make_bad_rrule) 
+ 
+    def testSecondlyBadComboRRule(self): 
+        """ 
+        See :func:`testMinutelyBadComboRRule' for details. 
+        """ 
+ 
+        # In Python 2.7 you can use a context manager for this. 
+        def make_bad_minute_rrule(): 
+            list(rrule(SECONDLY, interval=360, byminute=(10, 28, 49), 
+                 count=4, dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+        def make_bad_hour_rrule(): 
+            list(rrule(SECONDLY, interval=43200, byhour=(2, 10, 18, 23), 
+                 count=4, dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+        self.assertRaises(ValueError, make_bad_minute_rrule) 
+        self.assertRaises(ValueError, make_bad_hour_rrule) 
+ 
+    def testBadUntilCountRRule(self): 
+        """ 
+        See rfc-5545 3.3.10 - This checks for the deprecation warning, and will 
+        eventually check for an error. 
+        """ 
         with pytest.warns(DeprecationWarning):
-            rrule(DAILY, dtstart=datetime(1997, 9, 2, 9, 0),
-                         count=3, until=datetime(1997, 9, 4, 9, 0))
-
-    def testUntilNotMatching(self):
-        self.assertEqual(list(rrule(DAILY,
-                              dtstart=datetime(1997, 9, 2, 9, 0),
-                              until=datetime(1997, 9, 5, 8, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testUntilMatching(self):
-        self.assertEqual(list(rrule(DAILY,
-                              dtstart=datetime(1997, 9, 2, 9, 0),
-                              until=datetime(1997, 9, 4, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testUntilSingle(self):
-        self.assertEqual(list(rrule(DAILY,
-                              dtstart=datetime(1997, 9, 2, 9, 0),
-                              until=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0)])
-
-    def testUntilEmpty(self):
-        self.assertEqual(list(rrule(DAILY,
-                              dtstart=datetime(1997, 9, 2, 9, 0),
-                              until=datetime(1997, 9, 1, 9, 0))),
-                         [])
-
-    def testUntilWithDate(self):
-        self.assertEqual(list(rrule(DAILY,
-                              dtstart=datetime(1997, 9, 2, 9, 0),
-                              until=date(1997, 9, 5))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testWkStIntervalMO(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              interval=2,
-                              byweekday=(TU, SU),
-                              wkst=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 7, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testWkStIntervalSU(self):
-        self.assertEqual(list(rrule(WEEKLY,
-                              count=3,
-                              interval=2,
-                              byweekday=(TU, SU),
-                              wkst=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 14, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testDTStartIsDate(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              dtstart=date(1997, 9, 2))),
-                         [datetime(1997, 9, 2, 0, 0),
-                          datetime(1997, 9, 3, 0, 0),
-                          datetime(1997, 9, 4, 0, 0)])
-
-    def testDTStartWithMicroseconds(self):
-        self.assertEqual(list(rrule(DAILY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0, 0, 500000))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testMaxYear(self):
-        self.assertEqual(list(rrule(YEARLY,
-                              count=3,
-                              bymonth=2,
-                              bymonthday=31,
-                              dtstart=datetime(9997, 9, 2, 9, 0, 0))),
-                         [])
-
-    def testGetItem(self):
-        self.assertEqual(rrule(DAILY,
-                               count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0))[0],
-                         datetime(1997, 9, 2, 9, 0))
-
-    def testGetItemNeg(self):
-        self.assertEqual(rrule(DAILY,
-                               count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0))[-1],
-                         datetime(1997, 9, 4, 9, 0))
-
-    def testGetItemSlice(self):
-        self.assertEqual(rrule(DAILY,
-                               # count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0))[1:2],
-                         [datetime(1997, 9, 3, 9, 0)])
-
-    def testGetItemSliceEmpty(self):
-        self.assertEqual(rrule(DAILY,
-                               count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0))[:],
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0)])
-
-    def testGetItemSliceStep(self):
-        self.assertEqual(rrule(DAILY,
-                               count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0))[::-2],
-                         [datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 2, 9, 0)])
-
-    def testCount(self):
-        self.assertEqual(rrule(DAILY,
-                               count=3,
-                               dtstart=datetime(1997, 9, 2, 9, 0)).count(),
-                         3)
-
-    def testCountZero(self):
-        self.assertEqual(rrule(YEARLY,
-                               count=0,
-                               dtstart=datetime(1997, 9, 2, 9, 0)).count(),
-                         0)
-
-    def testContains(self):
-        rr = rrule(DAILY, count=3, dtstart=datetime(1997, 9, 2, 9, 0))
-        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True)
-
-    def testContainsNot(self):
-        rr = rrule(DAILY, count=3, dtstart=datetime(1997, 9, 2, 9, 0))
-        self.assertEqual(datetime(1997, 9, 3, 9, 0) not in rr, False)
-
-    def testBefore(self):
-        self.assertEqual(rrule(DAILY,  # count=5
-            dtstart=datetime(1997, 9, 2, 9, 0)).before(datetime(1997, 9, 5, 9, 0)),
-                         datetime(1997, 9, 4, 9, 0))
-
-    def testBeforeInc(self):
-        self.assertEqual(rrule(DAILY,
-                               #count=5,
-                               dtstart=datetime(1997, 9, 2, 9, 0))
-                               .before(datetime(1997, 9, 5, 9, 0), inc=True),
-                         datetime(1997, 9, 5, 9, 0))
-
-    def testAfter(self):
-        self.assertEqual(rrule(DAILY,
-                               #count=5,
-                               dtstart=datetime(1997, 9, 2, 9, 0))
-                               .after(datetime(1997, 9, 4, 9, 0)),
-                         datetime(1997, 9, 5, 9, 0))
-
-    def testAfterInc(self):
-        self.assertEqual(rrule(DAILY,
-                               #count=5,
-                               dtstart=datetime(1997, 9, 2, 9, 0))
-                               .after(datetime(1997, 9, 4, 9, 0), inc=True),
-                         datetime(1997, 9, 4, 9, 0))
-
-    def testXAfter(self):
-        self.assertEqual(list(rrule(DAILY,
-                                    dtstart=datetime(1997, 9, 2, 9, 0))
-                                    .xafter(datetime(1997, 9, 8, 9, 0), count=12)),
-                                    [datetime(1997, 9, 9, 9, 0),
-                                     datetime(1997, 9, 10, 9, 0),
-                                     datetime(1997, 9, 11, 9, 0),
-                                     datetime(1997, 9, 12, 9, 0),
-                                     datetime(1997, 9, 13, 9, 0),
-                                     datetime(1997, 9, 14, 9, 0),
-                                     datetime(1997, 9, 15, 9, 0),
-                                     datetime(1997, 9, 16, 9, 0),
-                                     datetime(1997, 9, 17, 9, 0),
-                                     datetime(1997, 9, 18, 9, 0),
-                                     datetime(1997, 9, 19, 9, 0),
-                                     datetime(1997, 9, 20, 9, 0)])
-
-    def testXAfterInc(self):
-        self.assertEqual(list(rrule(DAILY,
-                                    dtstart=datetime(1997, 9, 2, 9, 0))
-                                    .xafter(datetime(1997, 9, 8, 9, 0), count=12, inc=True)),
-                                    [datetime(1997, 9, 8, 9, 0),
-                                     datetime(1997, 9, 9, 9, 0),
-                                     datetime(1997, 9, 10, 9, 0),
-                                     datetime(1997, 9, 11, 9, 0),
-                                     datetime(1997, 9, 12, 9, 0),
-                                     datetime(1997, 9, 13, 9, 0),
-                                     datetime(1997, 9, 14, 9, 0),
-                                     datetime(1997, 9, 15, 9, 0),
-                                     datetime(1997, 9, 16, 9, 0),
-                                     datetime(1997, 9, 17, 9, 0),
-                                     datetime(1997, 9, 18, 9, 0),
-                                     datetime(1997, 9, 19, 9, 0)])
-
-    def testBetween(self):
-        self.assertEqual(rrule(DAILY,
-                               #count=5,
-                               dtstart=datetime(1997, 9, 2, 9, 0))
-                               .between(datetime(1997, 9, 2, 9, 0),
-                                        datetime(1997, 9, 6, 9, 0)),
-                         [datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 5, 9, 0)])
-
-    def testBetweenInc(self):
-        self.assertEqual(rrule(DAILY,
-                               #count=5,
-                               dtstart=datetime(1997, 9, 2, 9, 0))
-                               .between(datetime(1997, 9, 2, 9, 0),
-                                        datetime(1997, 9, 6, 9, 0), inc=True),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 5, 9, 0),
-                          datetime(1997, 9, 6, 9, 0)])
-
-    def testCachePre(self):
-        rr = rrule(DAILY, count=15, cache=True,
-                   dtstart=datetime(1997, 9, 2, 9, 0))
-        self.assertEqual(list(rr),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 5, 9, 0),
-                          datetime(1997, 9, 6, 9, 0),
-                          datetime(1997, 9, 7, 9, 0),
-                          datetime(1997, 9, 8, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 10, 9, 0),
-                          datetime(1997, 9, 11, 9, 0),
-                          datetime(1997, 9, 12, 9, 0),
-                          datetime(1997, 9, 13, 9, 0),
-                          datetime(1997, 9, 14, 9, 0),
-                          datetime(1997, 9, 15, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testCachePost(self):
-        rr = rrule(DAILY, count=15, cache=True,
-                   dtstart=datetime(1997, 9, 2, 9, 0))
-        for x in rr: pass
-        self.assertEqual(list(rr),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 5, 9, 0),
-                          datetime(1997, 9, 6, 9, 0),
-                          datetime(1997, 9, 7, 9, 0),
-                          datetime(1997, 9, 8, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 10, 9, 0),
-                          datetime(1997, 9, 11, 9, 0),
-                          datetime(1997, 9, 12, 9, 0),
-                          datetime(1997, 9, 13, 9, 0),
-                          datetime(1997, 9, 14, 9, 0),
-                          datetime(1997, 9, 15, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testCachePostInternal(self):
-        rr = rrule(DAILY, count=15, cache=True,
-                   dtstart=datetime(1997, 9, 2, 9, 0))
-        for x in rr: pass
-        self.assertEqual(rr._cache,
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 3, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 5, 9, 0),
-                          datetime(1997, 9, 6, 9, 0),
-                          datetime(1997, 9, 7, 9, 0),
-                          datetime(1997, 9, 8, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 10, 9, 0),
-                          datetime(1997, 9, 11, 9, 0),
-                          datetime(1997, 9, 12, 9, 0),
-                          datetime(1997, 9, 13, 9, 0),
-                          datetime(1997, 9, 14, 9, 0),
-                          datetime(1997, 9, 15, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testCachePreContains(self):
-        rr = rrule(DAILY, count=3, cache=True,
-                   dtstart=datetime(1997, 9, 2, 9, 0))
-        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True)
-
-    def testCachePostContains(self):
-        rr = rrule(DAILY, count=3, cache=True,
-                   dtstart=datetime(1997, 9, 2, 9, 0))
-        for x in rr: pass
-        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True)
-
-    def testStr(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrWithTZID(self):
-        NYC = tz.gettz('America/New_York')
-        self.assertEqual(list(rrulestr(
-                              "DTSTART;TZID=America/New_York:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0, tzinfo=NYC),
-                          datetime(1998, 9, 2, 9, 0, tzinfo=NYC),
-                          datetime(1999, 9, 2, 9, 0, tzinfo=NYC)])
-
-    def testStrWithTZIDMapping(self):
-        rrstr = ("DTSTART;TZID=Eastern:19970902T090000\n" +
-                 "RRULE:FREQ=YEARLY;COUNT=3")
-
-        NYC = tz.gettz('America/New_York')
-        rr = rrulestr(rrstr, tzids={'Eastern': NYC})
-        exp = [datetime(1997, 9, 2, 9, 0, tzinfo=NYC),
-               datetime(1998, 9, 2, 9, 0, tzinfo=NYC),
-               datetime(1999, 9, 2, 9, 0, tzinfo=NYC)]
-
-        self.assertEqual(list(rr), exp)
-
-    def testStrWithTZIDCallable(self):
-        rrstr = ('DTSTART;TZID=UTC+04:19970902T090000\n' +
-                 'RRULE:FREQ=YEARLY;COUNT=3')
-
-        TZ = tz.tzstr('UTC+04')
-        def parse_tzstr(tzstr):
-            if tzstr is None:
-                raise ValueError('Invalid tzstr')
-
-            return tz.tzstr(tzstr)
-
-        rr = rrulestr(rrstr, tzids=parse_tzstr)
-
-        exp = [datetime(1997, 9, 2, 9, 0, tzinfo=TZ),
-               datetime(1998, 9, 2, 9, 0, tzinfo=TZ),
-               datetime(1999, 9, 2, 9, 0, tzinfo=TZ),]
-
-        self.assertEqual(list(rr), exp)
-
-    def testStrWithTZIDCallableFailure(self):
-        rrstr = ('DTSTART;TZID=America/New_York:19970902T090000\n' +
-                 'RRULE:FREQ=YEARLY;COUNT=3')
-
-        class TzInfoError(Exception):
-            pass
-
-        def tzinfos(tzstr):
-            if tzstr == 'America/New_York':
-                raise TzInfoError('Invalid!')
-            return None
-
-        with self.assertRaises(TzInfoError):
-            rrulestr(rrstr, tzids=tzinfos)
-
-    def testStrWithConflictingTZID(self):
-        # RFC 5545 Section 3.3.5, FORM #2: DATE WITH UTC TIME
-        # https://tools.ietf.org/html/rfc5545#section-3.3.5
-        # The "TZID" property parameter MUST NOT be applied to DATE-TIME
-        with self.assertRaises(ValueError):
-            rrulestr("DTSTART;TZID=America/New_York:19970902T090000Z\n"+
-                     "RRULE:FREQ=YEARLY;COUNT=3\n")
-
-    def testStrType(self):
-        self.assertEqual(isinstance(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3\n"
-                              ), rrule), True)
-
-    def testStrForceSetType(self):
-        self.assertEqual(isinstance(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3\n"
-                              , forceset=True), rruleset), True)
-
-    def testStrSetType(self):
-        self.assertEqual(isinstance(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=2;BYDAY=TU\n"
-                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TH\n"
-                              ), rruleset), True)
-
-    def testStrCase(self):
-        self.assertEqual(list(rrulestr(
-                              "dtstart:19970902T090000\n"
-                              "rrule:freq=yearly;count=3\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrSpaces(self):
-        self.assertEqual(list(rrulestr(
-                              " DTSTART:19970902T090000 "
-                              " RRULE:FREQ=YEARLY;COUNT=3 "
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrSpacesAndLines(self):
-        self.assertEqual(list(rrulestr(
-                              " DTSTART:19970902T090000 \n"
-                              " \n"
-                              " RRULE:FREQ=YEARLY;COUNT=3 \n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrNoDTStart(self):
-        self.assertEqual(list(rrulestr(
-                              "RRULE:FREQ=YEARLY;COUNT=3\n"
-                              , dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrValueOnly(self):
-        self.assertEqual(list(rrulestr(
-                              "FREQ=YEARLY;COUNT=3\n"
-                              , dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrUnfold(self):
-        self.assertEqual(list(rrulestr(
-                              "FREQ=YEA\n RLY;COUNT=3\n", unfold=True,
-                              dtstart=datetime(1997, 9, 2, 9, 0))),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1998, 9, 2, 9, 0),
-                          datetime(1999, 9, 2, 9, 0)])
-
-    def testStrSet(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=2;BYDAY=TU\n"
-                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TH\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testStrSetDate(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TU\n"
-                              "RDATE:19970904T090000\n"
-                              "RDATE:19970909T090000\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testStrSetExRule(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=6;BYDAY=TU,TH\n"
-                              "EXRULE:FREQ=YEARLY;COUNT=3;BYDAY=TH\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testStrSetExDate(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=6;BYDAY=TU,TH\n"
-                              "EXDATE:19970904T090000\n"
-                              "EXDATE:19970911T090000\n"
-                              "EXDATE:19970918T090000\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
+            rrule(DAILY, dtstart=datetime(1997, 9, 2, 9, 0), 
+                         count=3, until=datetime(1997, 9, 4, 9, 0)) 
+ 
+    def testUntilNotMatching(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              dtstart=datetime(1997, 9, 2, 9, 0), 
+                              until=datetime(1997, 9, 5, 8, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testUntilMatching(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              dtstart=datetime(1997, 9, 2, 9, 0), 
+                              until=datetime(1997, 9, 4, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testUntilSingle(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              dtstart=datetime(1997, 9, 2, 9, 0), 
+                              until=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0)]) 
+ 
+    def testUntilEmpty(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              dtstart=datetime(1997, 9, 2, 9, 0), 
+                              until=datetime(1997, 9, 1, 9, 0))), 
+                         []) 
+ 
+    def testUntilWithDate(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              dtstart=datetime(1997, 9, 2, 9, 0), 
+                              until=date(1997, 9, 5))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testWkStIntervalMO(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              interval=2, 
+                              byweekday=(TU, SU), 
+                              wkst=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 7, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testWkStIntervalSU(self): 
+        self.assertEqual(list(rrule(WEEKLY, 
+                              count=3, 
+                              interval=2, 
+                              byweekday=(TU, SU), 
+                              wkst=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 14, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testDTStartIsDate(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              dtstart=date(1997, 9, 2))), 
+                         [datetime(1997, 9, 2, 0, 0), 
+                          datetime(1997, 9, 3, 0, 0), 
+                          datetime(1997, 9, 4, 0, 0)]) 
+ 
+    def testDTStartWithMicroseconds(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0, 0, 500000))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testMaxYear(self): 
+        self.assertEqual(list(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=2, 
+                              bymonthday=31, 
+                              dtstart=datetime(9997, 9, 2, 9, 0, 0))), 
+                         []) 
+ 
+    def testGetItem(self): 
+        self.assertEqual(rrule(DAILY, 
+                               count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0))[0], 
+                         datetime(1997, 9, 2, 9, 0)) 
+ 
+    def testGetItemNeg(self): 
+        self.assertEqual(rrule(DAILY, 
+                               count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0))[-1], 
+                         datetime(1997, 9, 4, 9, 0)) 
+ 
+    def testGetItemSlice(self): 
+        self.assertEqual(rrule(DAILY, 
+                               # count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0))[1:2], 
+                         [datetime(1997, 9, 3, 9, 0)]) 
+ 
+    def testGetItemSliceEmpty(self): 
+        self.assertEqual(rrule(DAILY, 
+                               count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0))[:], 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0)]) 
+ 
+    def testGetItemSliceStep(self): 
+        self.assertEqual(rrule(DAILY, 
+                               count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0))[::-2], 
+                         [datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 2, 9, 0)]) 
+ 
+    def testCount(self): 
+        self.assertEqual(rrule(DAILY, 
+                               count=3, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)).count(), 
+                         3) 
+ 
+    def testCountZero(self): 
+        self.assertEqual(rrule(YEARLY, 
+                               count=0, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)).count(), 
+                         0) 
+ 
+    def testContains(self): 
+        rr = rrule(DAILY, count=3, dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True) 
+ 
+    def testContainsNot(self): 
+        rr = rrule(DAILY, count=3, dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self.assertEqual(datetime(1997, 9, 3, 9, 0) not in rr, False) 
+ 
+    def testBefore(self): 
+        self.assertEqual(rrule(DAILY,  # count=5 
+            dtstart=datetime(1997, 9, 2, 9, 0)).before(datetime(1997, 9, 5, 9, 0)), 
+                         datetime(1997, 9, 4, 9, 0)) 
+ 
+    def testBeforeInc(self): 
+        self.assertEqual(rrule(DAILY, 
+                               #count=5, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)) 
+                               .before(datetime(1997, 9, 5, 9, 0), inc=True), 
+                         datetime(1997, 9, 5, 9, 0)) 
+ 
+    def testAfter(self): 
+        self.assertEqual(rrule(DAILY, 
+                               #count=5, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)) 
+                               .after(datetime(1997, 9, 4, 9, 0)), 
+                         datetime(1997, 9, 5, 9, 0)) 
+ 
+    def testAfterInc(self): 
+        self.assertEqual(rrule(DAILY, 
+                               #count=5, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)) 
+                               .after(datetime(1997, 9, 4, 9, 0), inc=True), 
+                         datetime(1997, 9, 4, 9, 0)) 
+ 
+    def testXAfter(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                                    dtstart=datetime(1997, 9, 2, 9, 0)) 
+                                    .xafter(datetime(1997, 9, 8, 9, 0), count=12)), 
+                                    [datetime(1997, 9, 9, 9, 0), 
+                                     datetime(1997, 9, 10, 9, 0), 
+                                     datetime(1997, 9, 11, 9, 0), 
+                                     datetime(1997, 9, 12, 9, 0), 
+                                     datetime(1997, 9, 13, 9, 0), 
+                                     datetime(1997, 9, 14, 9, 0), 
+                                     datetime(1997, 9, 15, 9, 0), 
+                                     datetime(1997, 9, 16, 9, 0), 
+                                     datetime(1997, 9, 17, 9, 0), 
+                                     datetime(1997, 9, 18, 9, 0), 
+                                     datetime(1997, 9, 19, 9, 0), 
+                                     datetime(1997, 9, 20, 9, 0)]) 
+ 
+    def testXAfterInc(self): 
+        self.assertEqual(list(rrule(DAILY, 
+                                    dtstart=datetime(1997, 9, 2, 9, 0)) 
+                                    .xafter(datetime(1997, 9, 8, 9, 0), count=12, inc=True)), 
+                                    [datetime(1997, 9, 8, 9, 0), 
+                                     datetime(1997, 9, 9, 9, 0), 
+                                     datetime(1997, 9, 10, 9, 0), 
+                                     datetime(1997, 9, 11, 9, 0), 
+                                     datetime(1997, 9, 12, 9, 0), 
+                                     datetime(1997, 9, 13, 9, 0), 
+                                     datetime(1997, 9, 14, 9, 0), 
+                                     datetime(1997, 9, 15, 9, 0), 
+                                     datetime(1997, 9, 16, 9, 0), 
+                                     datetime(1997, 9, 17, 9, 0), 
+                                     datetime(1997, 9, 18, 9, 0), 
+                                     datetime(1997, 9, 19, 9, 0)]) 
+ 
+    def testBetween(self): 
+        self.assertEqual(rrule(DAILY, 
+                               #count=5, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)) 
+                               .between(datetime(1997, 9, 2, 9, 0), 
+                                        datetime(1997, 9, 6, 9, 0)), 
+                         [datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 5, 9, 0)]) 
+ 
+    def testBetweenInc(self): 
+        self.assertEqual(rrule(DAILY, 
+                               #count=5, 
+                               dtstart=datetime(1997, 9, 2, 9, 0)) 
+                               .between(datetime(1997, 9, 2, 9, 0), 
+                                        datetime(1997, 9, 6, 9, 0), inc=True), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 5, 9, 0), 
+                          datetime(1997, 9, 6, 9, 0)]) 
+ 
+    def testCachePre(self): 
+        rr = rrule(DAILY, count=15, cache=True, 
+                   dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self.assertEqual(list(rr), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 5, 9, 0), 
+                          datetime(1997, 9, 6, 9, 0), 
+                          datetime(1997, 9, 7, 9, 0), 
+                          datetime(1997, 9, 8, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 10, 9, 0), 
+                          datetime(1997, 9, 11, 9, 0), 
+                          datetime(1997, 9, 12, 9, 0), 
+                          datetime(1997, 9, 13, 9, 0), 
+                          datetime(1997, 9, 14, 9, 0), 
+                          datetime(1997, 9, 15, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testCachePost(self): 
+        rr = rrule(DAILY, count=15, cache=True, 
+                   dtstart=datetime(1997, 9, 2, 9, 0)) 
+        for x in rr: pass 
+        self.assertEqual(list(rr), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 5, 9, 0), 
+                          datetime(1997, 9, 6, 9, 0), 
+                          datetime(1997, 9, 7, 9, 0), 
+                          datetime(1997, 9, 8, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 10, 9, 0), 
+                          datetime(1997, 9, 11, 9, 0), 
+                          datetime(1997, 9, 12, 9, 0), 
+                          datetime(1997, 9, 13, 9, 0), 
+                          datetime(1997, 9, 14, 9, 0), 
+                          datetime(1997, 9, 15, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testCachePostInternal(self): 
+        rr = rrule(DAILY, count=15, cache=True, 
+                   dtstart=datetime(1997, 9, 2, 9, 0)) 
+        for x in rr: pass 
+        self.assertEqual(rr._cache, 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 3, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 5, 9, 0), 
+                          datetime(1997, 9, 6, 9, 0), 
+                          datetime(1997, 9, 7, 9, 0), 
+                          datetime(1997, 9, 8, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 10, 9, 0), 
+                          datetime(1997, 9, 11, 9, 0), 
+                          datetime(1997, 9, 12, 9, 0), 
+                          datetime(1997, 9, 13, 9, 0), 
+                          datetime(1997, 9, 14, 9, 0), 
+                          datetime(1997, 9, 15, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testCachePreContains(self): 
+        rr = rrule(DAILY, count=3, cache=True, 
+                   dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True) 
+ 
+    def testCachePostContains(self): 
+        rr = rrule(DAILY, count=3, cache=True, 
+                   dtstart=datetime(1997, 9, 2, 9, 0)) 
+        for x in rr: pass 
+        self.assertEqual(datetime(1997, 9, 3, 9, 0) in rr, True) 
+ 
+    def testStr(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrWithTZID(self): 
+        NYC = tz.gettz('America/New_York') 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART;TZID=America/New_York:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0, tzinfo=NYC), 
+                          datetime(1998, 9, 2, 9, 0, tzinfo=NYC), 
+                          datetime(1999, 9, 2, 9, 0, tzinfo=NYC)]) 
+ 
+    def testStrWithTZIDMapping(self): 
+        rrstr = ("DTSTART;TZID=Eastern:19970902T090000\n" + 
+                 "RRULE:FREQ=YEARLY;COUNT=3") 
+ 
+        NYC = tz.gettz('America/New_York') 
+        rr = rrulestr(rrstr, tzids={'Eastern': NYC}) 
+        exp = [datetime(1997, 9, 2, 9, 0, tzinfo=NYC), 
+               datetime(1998, 9, 2, 9, 0, tzinfo=NYC), 
+               datetime(1999, 9, 2, 9, 0, tzinfo=NYC)] 
+ 
+        self.assertEqual(list(rr), exp) 
+ 
+    def testStrWithTZIDCallable(self): 
+        rrstr = ('DTSTART;TZID=UTC+04:19970902T090000\n' + 
+                 'RRULE:FREQ=YEARLY;COUNT=3') 
+ 
+        TZ = tz.tzstr('UTC+04') 
+        def parse_tzstr(tzstr): 
+            if tzstr is None: 
+                raise ValueError('Invalid tzstr') 
+ 
+            return tz.tzstr(tzstr) 
+ 
+        rr = rrulestr(rrstr, tzids=parse_tzstr) 
+ 
+        exp = [datetime(1997, 9, 2, 9, 0, tzinfo=TZ), 
+               datetime(1998, 9, 2, 9, 0, tzinfo=TZ), 
+               datetime(1999, 9, 2, 9, 0, tzinfo=TZ),] 
+ 
+        self.assertEqual(list(rr), exp) 
+ 
+    def testStrWithTZIDCallableFailure(self): 
+        rrstr = ('DTSTART;TZID=America/New_York:19970902T090000\n' + 
+                 'RRULE:FREQ=YEARLY;COUNT=3') 
+ 
+        class TzInfoError(Exception): 
+            pass 
+ 
+        def tzinfos(tzstr): 
+            if tzstr == 'America/New_York': 
+                raise TzInfoError('Invalid!') 
+            return None 
+ 
+        with self.assertRaises(TzInfoError): 
+            rrulestr(rrstr, tzids=tzinfos) 
+ 
+    def testStrWithConflictingTZID(self): 
+        # RFC 5545 Section 3.3.5, FORM #2: DATE WITH UTC TIME 
+        # https://tools.ietf.org/html/rfc5545#section-3.3.5 
+        # The "TZID" property parameter MUST NOT be applied to DATE-TIME 
+        with self.assertRaises(ValueError): 
+            rrulestr("DTSTART;TZID=America/New_York:19970902T090000Z\n"+ 
+                     "RRULE:FREQ=YEARLY;COUNT=3\n") 
+ 
+    def testStrType(self): 
+        self.assertEqual(isinstance(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3\n" 
+                              ), rrule), True) 
+ 
+    def testStrForceSetType(self): 
+        self.assertEqual(isinstance(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3\n" 
+                              , forceset=True), rruleset), True) 
+ 
+    def testStrSetType(self): 
+        self.assertEqual(isinstance(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=2;BYDAY=TU\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TH\n" 
+                              ), rruleset), True) 
+ 
+    def testStrCase(self): 
+        self.assertEqual(list(rrulestr( 
+                              "dtstart:19970902T090000\n" 
+                              "rrule:freq=yearly;count=3\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrSpaces(self): 
+        self.assertEqual(list(rrulestr( 
+                              " DTSTART:19970902T090000 " 
+                              " RRULE:FREQ=YEARLY;COUNT=3 " 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrSpacesAndLines(self): 
+        self.assertEqual(list(rrulestr( 
+                              " DTSTART:19970902T090000 \n" 
+                              " \n" 
+                              " RRULE:FREQ=YEARLY;COUNT=3 \n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrNoDTStart(self): 
+        self.assertEqual(list(rrulestr( 
+                              "RRULE:FREQ=YEARLY;COUNT=3\n" 
+                              , dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrValueOnly(self): 
+        self.assertEqual(list(rrulestr( 
+                              "FREQ=YEARLY;COUNT=3\n" 
+                              , dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrUnfold(self): 
+        self.assertEqual(list(rrulestr( 
+                              "FREQ=YEA\n RLY;COUNT=3\n", unfold=True, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1998, 9, 2, 9, 0), 
+                          datetime(1999, 9, 2, 9, 0)]) 
+ 
+    def testStrSet(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=2;BYDAY=TU\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TH\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testStrSetDate(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TU\n" 
+                              "RDATE:19970904T090000\n" 
+                              "RDATE:19970909T090000\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testStrSetExRule(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=6;BYDAY=TU,TH\n" 
+                              "EXRULE:FREQ=YEARLY;COUNT=3;BYDAY=TH\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testStrSetExDate(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=6;BYDAY=TU,TH\n" 
+                              "EXDATE:19970904T090000\n" 
+                              "EXDATE:19970911T090000\n" 
+                              "EXDATE:19970918T090000\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
     def testStrSetExDateMultiple(self):
         rrstr = ("DTSTART:19970902T090000\n"
                  "RRULE:FREQ=YEARLY;COUNT=6;BYDAY=TU,TH\n"
@@ -2920,1995 +2920,1995 @@ class RRuleTest(unittest.TestCase):
         rr = rrulestr(rrstr)
         assert list(rr) == [datetime(1997, 9, 4), datetime(1997, 9, 11)]
 
-    def testStrSetDateAndExDate(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RDATE:19970902T090000\n"
-                              "RDATE:19970904T090000\n"
-                              "RDATE:19970909T090000\n"
-                              "RDATE:19970911T090000\n"
-                              "RDATE:19970916T090000\n"
-                              "RDATE:19970918T090000\n"
-                              "EXDATE:19970904T090000\n"
-                              "EXDATE:19970911T090000\n"
-                              "EXDATE:19970918T090000\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testStrSetDateAndExRule(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RDATE:19970902T090000\n"
-                              "RDATE:19970904T090000\n"
-                              "RDATE:19970909T090000\n"
-                              "RDATE:19970911T090000\n"
-                              "RDATE:19970916T090000\n"
-                              "RDATE:19970918T090000\n"
-                              "EXRULE:FREQ=YEARLY;COUNT=3;BYDAY=TH\n"
-                              )),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testStrKeywords(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3;INTERVAL=3;"
-                                    "BYMONTH=3;BYWEEKDAY=TH;BYMONTHDAY=3;"
-                                    "BYHOUR=3;BYMINUTE=3;BYSECOND=3\n"
-                              )),
-                         [datetime(2033, 3, 3, 3, 3, 3),
-                          datetime(2039, 3, 3, 3, 3, 3),
-                          datetime(2072, 3, 3, 3, 3, 3)])
-
-    def testStrNWeekDay(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;COUNT=3;BYDAY=1TU,-1TH\n"
-                              )),
-                         [datetime(1997, 12, 25, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 12, 31, 9, 0)])
-
-    def testStrUntil(self):
-        self.assertEqual(list(rrulestr(
-                              "DTSTART:19970902T090000\n"
-                              "RRULE:FREQ=YEARLY;"
-                              "UNTIL=19990101T000000;BYDAY=1TU,-1TH\n"
-                              )),
-                         [datetime(1997, 12, 25, 9, 0),
-                          datetime(1998, 1, 6, 9, 0),
-                          datetime(1998, 12, 31, 9, 0)])
-
-    def testStrValueDatetime(self):
-        rr = rrulestr("DTSTART;VALUE=DATE-TIME:19970902T090000\n"
-                       "RRULE:FREQ=YEARLY;COUNT=2")
-
-        self.assertEqual(list(rr), [datetime(1997, 9, 2, 9, 0, 0),
-                                    datetime(1998, 9, 2, 9, 0, 0)])
-
-    def testStrValueDate(self):
-        rr = rrulestr("DTSTART;VALUE=DATE:19970902\n"
-                       "RRULE:FREQ=YEARLY;COUNT=2")
-
-        self.assertEqual(list(rr), [datetime(1997, 9, 2, 0, 0, 0),
-                                    datetime(1998, 9, 2, 0, 0, 0)])
-
+    def testStrSetDateAndExDate(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RDATE:19970902T090000\n" 
+                              "RDATE:19970904T090000\n" 
+                              "RDATE:19970909T090000\n" 
+                              "RDATE:19970911T090000\n" 
+                              "RDATE:19970916T090000\n" 
+                              "RDATE:19970918T090000\n" 
+                              "EXDATE:19970904T090000\n" 
+                              "EXDATE:19970911T090000\n" 
+                              "EXDATE:19970918T090000\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testStrSetDateAndExRule(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RDATE:19970902T090000\n" 
+                              "RDATE:19970904T090000\n" 
+                              "RDATE:19970909T090000\n" 
+                              "RDATE:19970911T090000\n" 
+                              "RDATE:19970916T090000\n" 
+                              "RDATE:19970918T090000\n" 
+                              "EXRULE:FREQ=YEARLY;COUNT=3;BYDAY=TH\n" 
+                              )), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testStrKeywords(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3;INTERVAL=3;" 
+                                    "BYMONTH=3;BYWEEKDAY=TH;BYMONTHDAY=3;" 
+                                    "BYHOUR=3;BYMINUTE=3;BYSECOND=3\n" 
+                              )), 
+                         [datetime(2033, 3, 3, 3, 3, 3), 
+                          datetime(2039, 3, 3, 3, 3, 3), 
+                          datetime(2072, 3, 3, 3, 3, 3)]) 
+ 
+    def testStrNWeekDay(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;COUNT=3;BYDAY=1TU,-1TH\n" 
+                              )), 
+                         [datetime(1997, 12, 25, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 12, 31, 9, 0)]) 
+ 
+    def testStrUntil(self): 
+        self.assertEqual(list(rrulestr( 
+                              "DTSTART:19970902T090000\n" 
+                              "RRULE:FREQ=YEARLY;" 
+                              "UNTIL=19990101T000000;BYDAY=1TU,-1TH\n" 
+                              )), 
+                         [datetime(1997, 12, 25, 9, 0), 
+                          datetime(1998, 1, 6, 9, 0), 
+                          datetime(1998, 12, 31, 9, 0)]) 
+ 
+    def testStrValueDatetime(self): 
+        rr = rrulestr("DTSTART;VALUE=DATE-TIME:19970902T090000\n" 
+                       "RRULE:FREQ=YEARLY;COUNT=2") 
+ 
+        self.assertEqual(list(rr), [datetime(1997, 9, 2, 9, 0, 0), 
+                                    datetime(1998, 9, 2, 9, 0, 0)]) 
+ 
+    def testStrValueDate(self): 
+        rr = rrulestr("DTSTART;VALUE=DATE:19970902\n" 
+                       "RRULE:FREQ=YEARLY;COUNT=2") 
+ 
+        self.assertEqual(list(rr), [datetime(1997, 9, 2, 0, 0, 0), 
+                                    datetime(1998, 9, 2, 0, 0, 0)]) 
+ 
     def testStrMultipleDTStartComma(self):
         with pytest.raises(ValueError):
             rr = rrulestr("DTSTART:19970101T000000,19970202T000000\n"
                           "RRULE:FREQ=YEARLY;COUNT=1")
 
-    def testStrInvalidUntil(self):
-        with self.assertRaises(ValueError):
-            list(rrulestr("DTSTART:19970902T090000\n"
-                          "RRULE:FREQ=YEARLY;"
-                          "UNTIL=TheCowsComeHome;BYDAY=1TU,-1TH\n"))
-
-    def testStrUntilMustBeUTC(self):
-        with self.assertRaises(ValueError):
-            list(rrulestr("DTSTART;TZID=America/New_York:19970902T090000\n"
-                          "RRULE:FREQ=YEARLY;"
-                          "UNTIL=19990101T000000;BYDAY=1TU,-1TH\n"))
-
-    def testStrUntilWithTZ(self):
-        NYC = tz.gettz('America/New_York')
-        rr = list(rrulestr("DTSTART;TZID=America/New_York:19970101T000000\n"
-                          "RRULE:FREQ=YEARLY;"
-                          "UNTIL=19990101T000000Z\n"))
-        self.assertEqual(list(rr), [datetime(1997, 1, 1, 0, 0, 0, tzinfo=NYC),
-                                    datetime(1998, 1, 1, 0, 0, 0, tzinfo=NYC)])
-
-    def testStrEmptyByDay(self):
-        with self.assertRaises(ValueError):
-            list(rrulestr("DTSTART:19970902T090000\n"
-                          "FREQ=WEEKLY;"
-                          "BYDAY=;"         # This part is invalid
-                          "WKST=SU"))
-
-    def testStrInvalidByDay(self):
-        with self.assertRaises(ValueError):
-            list(rrulestr("DTSTART:19970902T090000\n"
-                          "FREQ=WEEKLY;"
-                          "BYDAY=-1OK;"         # This part is invalid
-                          "WKST=SU"))
-
-    def testBadBySetPos(self):
-        self.assertRaises(ValueError,
-                          rrule, MONTHLY,
-                                 count=1,
-                                 bysetpos=0,
-                                 dtstart=datetime(1997, 9, 2, 9, 0))
-
-    def testBadBySetPosMany(self):
-        self.assertRaises(ValueError,
-                          rrule, MONTHLY,
-                                 count=1,
-                                 bysetpos=(-1, 0, 1),
-                                 dtstart=datetime(1997, 9, 2, 9, 0))
-
-    # Tests to ensure that str(rrule) works
-    def testToStrYearly(self):
-        rule = rrule(YEARLY, count=3, dtstart=datetime(1997, 9, 2, 9, 0))
-        self._rrulestr_reverse_test(rule)
-
-    def testToStrYearlyInterval(self):
-        rule = rrule(YEARLY, count=3, interval=2,
-                     dtstart=datetime(1997, 9, 2, 9, 0))
-        self._rrulestr_reverse_test(rule)
-
-    def testToStrYearlyByMonth(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                                          count=3,
-                                          bymonth=(1, 3),
-                                          dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                                          count=3,
-                                          bymonthday=(1, 3),
-                                          dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                                          count=3,
-                                          bymonth=(1, 3),
-                                          bymonthday=(5, 7),
-                                          dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                                          count=3,
-                                          byweekday=(TU, TH),
-                                          dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                                          count=3,
-                                          byweekday=(TU(1), TH(-1)),
-                                          dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByNWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndNWeekDayLarge(self):
-        # This is interesting because the TH(-3) ends up before
-        # the TU(3).
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByEaster(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByHour(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMinute(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyBySecond(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrYearlyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(YEARLY,
-                              count=3,
-                              bymonthday=15,
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthly(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyInterval(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              interval=18,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonth(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-        # Third Monday of the month
-        self.assertEqual(rrule(MONTHLY,
-                         byweekday=(MO(+3)),
-                         dtstart=datetime(1997, 9, 1)).between(datetime(1997,
-                                                                        9,
-                                                                        1),
-                                                               datetime(1997,
-                                                                        12,
-                                                                        1)),
-                         [datetime(1997, 9, 15, 0, 0),
-                          datetime(1997, 10, 20, 0, 0),
-                          datetime(1997, 11, 17, 0, 0)])
-
-    def testToStrMonthlyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByNWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndNWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(3), TH(-3)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByEaster(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByHour(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMinute(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyBySecond(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMonthlyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(MONTHLY,
-                              count=3,
-                              bymonthday=(13, 17),
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeekly(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyInterval(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              interval=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonth(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndWeekDay(self):
-        # This test is interesting, because it crosses the year
-        # boundary in a weekly period to find day '1' as a
-        # valid recurrence.
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByEaster(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByHour(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMinute(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyBySecond(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrWeeklyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              byhour=(6, 18),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDaily(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyInterval(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              interval=92,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonth(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=4,
-                              bymonth=(1, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekNoAndWeekDay(self):
-        # That's a nice one. The first days of week number one
-        # may be in the last year.
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekNoAndWeekDayLarge(self):
-        # Another nice test. The last days of week number 52/53
-        # may be in the next year.
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByEaster(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByHour(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMinute(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyBySecond(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrDailyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(DAILY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(15, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourly(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyInterval(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              interval=769,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonth(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekNoAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekNoAndWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByEaster(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByHour(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMinute(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyBySecond(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrHourlyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(HOURLY,
-                              count=3,
-                              byminute=(15, 45),
-                              bysecond=(15, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutely(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyInterval(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              interval=1501,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonth(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekNoAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekNoAndWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByEaster(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByHour(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMinute(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyBySecond(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrMinutelyBySetPos(self):
-        self._rrulestr_reverse_test(rrule(MINUTELY,
-                              count=3,
-                              bysecond=(15, 30, 45),
-                              bysetpos=(3, -3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondly(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyInterval(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              interval=2,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyIntervalLarge(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              interval=90061,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonth(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndMonthDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(5, 7),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndNWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              byweekday=(TU(1), TH(-1)),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndMonthDayAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bymonth=(1, 3),
-                              bymonthday=(1, 3),
-                              byweekday=(TU, TH),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByYearDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=4,
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=4,
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndYearDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(1, 100, 200, 365),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMonthAndYearDayNeg(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=4,
-                              bymonth=(4, 7),
-                              byyearday=(-365, -266, -166, -1),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekNo(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekno=20,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekNoAndWeekDay(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekno=1,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekNoAndWeekDayLarge(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekno=52,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekNoAndWeekDayLast(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekno=-1,
-                              byweekday=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByWeekNoAndWeekDay53(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byweekno=53,
-                              byweekday=MO,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByEaster(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byeaster=0,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByEasterPos(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byeaster=1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByEasterNeg(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byeaster=-1,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByHour(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMinute(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyBySecond(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByHourAndMinute(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByHourAndSecond(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByHourAndMinuteAndSecond(self):
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              byhour=(6, 18),
-                              byminute=(6, 18),
-                              bysecond=(6, 18),
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrSecondlyByHourAndMinuteAndSecondBug(self):
-        # This explores a bug found by Mathieu Bridon.
-        self._rrulestr_reverse_test(rrule(SECONDLY,
-                              count=3,
-                              bysecond=(0,),
-                              byminute=(1,),
-                              dtstart=datetime(2010, 3, 22, 12, 1)))
-
-    def testToStrWithWkSt(self):
-        self._rrulestr_reverse_test(rrule(WEEKLY,
-                              count=3,
-                              wkst=SU,
-                              dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testToStrLongIntegers(self):
+    def testStrInvalidUntil(self): 
+        with self.assertRaises(ValueError): 
+            list(rrulestr("DTSTART:19970902T090000\n" 
+                          "RRULE:FREQ=YEARLY;" 
+                          "UNTIL=TheCowsComeHome;BYDAY=1TU,-1TH\n")) 
+ 
+    def testStrUntilMustBeUTC(self): 
+        with self.assertRaises(ValueError): 
+            list(rrulestr("DTSTART;TZID=America/New_York:19970902T090000\n" 
+                          "RRULE:FREQ=YEARLY;" 
+                          "UNTIL=19990101T000000;BYDAY=1TU,-1TH\n")) 
+ 
+    def testStrUntilWithTZ(self): 
+        NYC = tz.gettz('America/New_York') 
+        rr = list(rrulestr("DTSTART;TZID=America/New_York:19970101T000000\n" 
+                          "RRULE:FREQ=YEARLY;" 
+                          "UNTIL=19990101T000000Z\n")) 
+        self.assertEqual(list(rr), [datetime(1997, 1, 1, 0, 0, 0, tzinfo=NYC), 
+                                    datetime(1998, 1, 1, 0, 0, 0, tzinfo=NYC)]) 
+ 
+    def testStrEmptyByDay(self): 
+        with self.assertRaises(ValueError): 
+            list(rrulestr("DTSTART:19970902T090000\n" 
+                          "FREQ=WEEKLY;" 
+                          "BYDAY=;"         # This part is invalid 
+                          "WKST=SU")) 
+ 
+    def testStrInvalidByDay(self): 
+        with self.assertRaises(ValueError): 
+            list(rrulestr("DTSTART:19970902T090000\n" 
+                          "FREQ=WEEKLY;" 
+                          "BYDAY=-1OK;"         # This part is invalid 
+                          "WKST=SU")) 
+ 
+    def testBadBySetPos(self): 
+        self.assertRaises(ValueError, 
+                          rrule, MONTHLY, 
+                                 count=1, 
+                                 bysetpos=0, 
+                                 dtstart=datetime(1997, 9, 2, 9, 0)) 
+ 
+    def testBadBySetPosMany(self): 
+        self.assertRaises(ValueError, 
+                          rrule, MONTHLY, 
+                                 count=1, 
+                                 bysetpos=(-1, 0, 1), 
+                                 dtstart=datetime(1997, 9, 2, 9, 0)) 
+ 
+    # Tests to ensure that str(rrule) works 
+    def testToStrYearly(self): 
+        rule = rrule(YEARLY, count=3, dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self._rrulestr_reverse_test(rule) 
+ 
+    def testToStrYearlyInterval(self): 
+        rule = rrule(YEARLY, count=3, interval=2, 
+                     dtstart=datetime(1997, 9, 2, 9, 0)) 
+        self._rrulestr_reverse_test(rule) 
+ 
+    def testToStrYearlyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                                          count=3, 
+                                          bymonth=(1, 3), 
+                                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                                          count=3, 
+                                          bymonthday=(1, 3), 
+                                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                                          count=3, 
+                                          bymonth=(1, 3), 
+                                          bymonthday=(5, 7), 
+                                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                                          count=3, 
+                                          byweekday=(TU, TH), 
+                                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                                          count=3, 
+                                          byweekday=(TU(1), TH(-1)), 
+                                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByNWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndNWeekDayLarge(self): 
+        # This is interesting because the TH(-3) ends up before 
+        # the TU(3). 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByHour(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrYearlyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(YEARLY, 
+                              count=3, 
+                              bymonthday=15, 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthly(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyInterval(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              interval=18, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+        # Third Monday of the month 
+        self.assertEqual(rrule(MONTHLY, 
+                         byweekday=(MO(+3)), 
+                         dtstart=datetime(1997, 9, 1)).between(datetime(1997, 
+                                                                        9, 
+                                                                        1), 
+                                                               datetime(1997, 
+                                                                        12, 
+                                                                        1)), 
+                         [datetime(1997, 9, 15, 0, 0), 
+                          datetime(1997, 10, 20, 0, 0), 
+                          datetime(1997, 11, 17, 0, 0)]) 
+ 
+    def testToStrMonthlyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByNWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndNWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(3), TH(-3)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByHour(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMonthlyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(MONTHLY, 
+                              count=3, 
+                              bymonthday=(13, 17), 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeekly(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyInterval(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              interval=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndWeekDay(self): 
+        # This test is interesting, because it crosses the year 
+        # boundary in a weekly period to find day '1' as a 
+        # valid recurrence. 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByHour(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrWeeklyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              byhour=(6, 18), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDaily(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyInterval(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              interval=92, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=4, 
+                              bymonth=(1, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekNoAndWeekDay(self): 
+        # That's a nice one. The first days of week number one 
+        # may be in the last year. 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekNoAndWeekDayLarge(self): 
+        # Another nice test. The last days of week number 52/53 
+        # may be in the next year. 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByHour(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrDailyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(DAILY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(15, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourly(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyInterval(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              interval=769, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekNoAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekNoAndWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByHour(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrHourlyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(HOURLY, 
+                              count=3, 
+                              byminute=(15, 45), 
+                              bysecond=(15, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutely(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyInterval(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              interval=1501, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekNoAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekNoAndWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByHour(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrMinutelyBySetPos(self): 
+        self._rrulestr_reverse_test(rrule(MINUTELY, 
+                              count=3, 
+                              bysecond=(15, 30, 45), 
+                              bysetpos=(3, -3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondly(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyInterval(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              interval=2, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyIntervalLarge(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              interval=90061, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonth(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndMonthDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(5, 7), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndNWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              byweekday=(TU(1), TH(-1)), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndMonthDayAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bymonth=(1, 3), 
+                              bymonthday=(1, 3), 
+                              byweekday=(TU, TH), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByYearDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=4, 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=4, 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndYearDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(1, 100, 200, 365), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMonthAndYearDayNeg(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=4, 
+                              bymonth=(4, 7), 
+                              byyearday=(-365, -266, -166, -1), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekNo(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=20, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekNoAndWeekDay(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=1, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekNoAndWeekDayLarge(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=52, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekNoAndWeekDayLast(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=-1, 
+                              byweekday=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByWeekNoAndWeekDay53(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byweekno=53, 
+                              byweekday=MO, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByEaster(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=0, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByEasterPos(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByEasterNeg(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byeaster=-1, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByHour(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMinute(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyBySecond(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByHourAndMinute(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByHourAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByHourAndMinuteAndSecond(self): 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              byhour=(6, 18), 
+                              byminute=(6, 18), 
+                              bysecond=(6, 18), 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrSecondlyByHourAndMinuteAndSecondBug(self): 
+        # This explores a bug found by Mathieu Bridon. 
+        self._rrulestr_reverse_test(rrule(SECONDLY, 
+                              count=3, 
+                              bysecond=(0,), 
+                              byminute=(1,), 
+                              dtstart=datetime(2010, 3, 22, 12, 1))) 
+ 
+    def testToStrWithWkSt(self): 
+        self._rrulestr_reverse_test(rrule(WEEKLY, 
+                              count=3, 
+                              wkst=SU, 
+                              dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testToStrLongIntegers(self): 
         if PY2:  # There are no longs in python3
-            self._rrulestr_reverse_test(rrule(MINUTELY,
-                                  count=long(2),
-                                  interval=long(2),
-                                  bymonth=long(2),
-                                  byweekday=long(3),
-                                  byhour=long(6),
-                                  byminute=long(6),
-                                  bysecond=long(6),
-                                  dtstart=datetime(1997, 9, 2, 9, 0)))
-
-            self._rrulestr_reverse_test(rrule(YEARLY,
-                                  count=long(2),
-                                  bymonthday=long(5),
-                                  byweekno=long(2),
-                                  dtstart=datetime(1997, 9, 2, 9, 0)))
-
-    def testReplaceIfSet(self):
-        rr = rrule(YEARLY,
-                   count=1,
-                   bymonthday=5,
-                   dtstart=datetime(1997, 1, 1))
-        newrr = rr.replace(bymonthday=6)
-        self.assertEqual(list(rr), [datetime(1997, 1, 5)])
-        self.assertEqual(list(newrr),
-                             [datetime(1997, 1, 6)])
-
-    def testReplaceIfNotSet(self):
-        rr = rrule(YEARLY,
-           count=1,
-           dtstart=datetime(1997, 1, 1))
-        newrr = rr.replace(bymonthday=6)
-        self.assertEqual(list(rr), [datetime(1997, 1, 1)])
-        self.assertEqual(list(newrr),
-                             [datetime(1997, 1, 6)])
-
-
-@pytest.mark.rrule
-@freeze_time(datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC))
-def test_generated_aware_dtstart():
-    dtstart_exp = datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC)
-    UNTIL = datetime(2018, 3, 6, 8, 0, tzinfo=tz.UTC)
-
-    rule_without_dtstart = rrule(freq=HOURLY, until=UNTIL)
-    rule_with_dtstart = rrule(freq=HOURLY, dtstart=dtstart_exp, until=UNTIL)
-    assert list(rule_without_dtstart) == list(rule_with_dtstart)
-
-
-@pytest.mark.rrule
-@pytest.mark.rrulestr
-@pytest.mark.xfail(reason="rrulestr loses time zone, gh issue #637")
-@freeze_time(datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC))
-def test_generated_aware_dtstart_rrulestr():
-    rrule_without_dtstart = rrule(freq=HOURLY,
-                                  until=datetime(2018, 3, 6, 8, 0,
-                                                 tzinfo=tz.UTC))
-    rrule_r = rrulestr(str(rrule_without_dtstart))
-
-    assert list(rrule_r) == list(rrule_without_dtstart)
-
-
-@pytest.mark.rruleset
-class RRuleSetTest(unittest.TestCase):
-    def testSet(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testSetDate(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=1, byweekday=TU,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.rdate(datetime(1997, 9, 4, 9))
-        rrset.rdate(datetime(1997, 9, 9, 9))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testSetExRule(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH),
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testSetExDate(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH),
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.exdate(datetime(1997, 9, 4, 9))
-        rrset.exdate(datetime(1997, 9, 11, 9))
-        rrset.exdate(datetime(1997, 9, 18, 9))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testSetExDateRevOrder(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(MONTHLY, count=5, bymonthday=10,
-                          dtstart=datetime(2004, 1, 1, 9, 0)))
-        rrset.exdate(datetime(2004, 4, 10, 9, 0))
-        rrset.exdate(datetime(2004, 2, 10, 9, 0))
-        self.assertEqual(list(rrset),
-                         [datetime(2004, 1, 10, 9, 0),
-                          datetime(2004, 3, 10, 9, 0),
-                          datetime(2004, 5, 10, 9, 0)])
-
-    def testSetDateAndExDate(self):
-        rrset = rruleset()
-        rrset.rdate(datetime(1997, 9, 2, 9))
-        rrset.rdate(datetime(1997, 9, 4, 9))
-        rrset.rdate(datetime(1997, 9, 9, 9))
-        rrset.rdate(datetime(1997, 9, 11, 9))
-        rrset.rdate(datetime(1997, 9, 16, 9))
-        rrset.rdate(datetime(1997, 9, 18, 9))
-        rrset.exdate(datetime(1997, 9, 4, 9))
-        rrset.exdate(datetime(1997, 9, 11, 9))
-        rrset.exdate(datetime(1997, 9, 18, 9))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testSetDateAndExRule(self):
-        rrset = rruleset()
-        rrset.rdate(datetime(1997, 9, 2, 9))
-        rrset.rdate(datetime(1997, 9, 4, 9))
-        rrset.rdate(datetime(1997, 9, 9, 9))
-        rrset.rdate(datetime(1997, 9, 11, 9))
-        rrset.rdate(datetime(1997, 9, 16, 9))
-        rrset.rdate(datetime(1997, 9, 18, 9))
-        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH,
-                           dtstart=datetime(1997, 9, 2, 9, 0)))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 9, 9, 0),
-                          datetime(1997, 9, 16, 9, 0)])
-
-    def testSetCount(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH),
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH,
-                           dtstart=datetime(1997, 9, 2, 9, 0)))
-        self.assertEqual(rrset.count(), 3)
-
-    def testSetCachePre(self):
-        rrset = rruleset()
-        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testSetCachePost(self):
-        rrset = rruleset(cache=True)
-        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        for x in rrset: pass
-        self.assertEqual(list(rrset),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testSetCachePostInternal(self):
-        rrset = rruleset(cache=True)
-        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH,
-                          dtstart=datetime(1997, 9, 2, 9, 0)))
-        for x in rrset: pass
-        self.assertEqual(list(rrset._cache),
-                         [datetime(1997, 9, 2, 9, 0),
-                          datetime(1997, 9, 4, 9, 0),
-                          datetime(1997, 9, 9, 9, 0)])
-
-    def testSetRRuleCount(self):
-        # Test that the count is updated when an rrule is added
-        rrset = rruleset(cache=False)
-        for cache in (True, False):
-            rrset = rruleset(cache=cache)
-            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH,
-                              dtstart=datetime(1983, 4, 1)))
-            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR,
-                              dtstart=datetime(1991, 6, 3)))
-
-            # Check the length twice - first one sets a cache, second reads it
-            self.assertEqual(rrset.count(), 6)
-            self.assertEqual(rrset.count(), 6)
-
-            # This should invalidate the cache and force an update
-            rrset.rrule(rrule(MONTHLY, count=3, dtstart=datetime(1994, 1, 3)))
-
-            self.assertEqual(rrset.count(), 9)
-            self.assertEqual(rrset.count(), 9)
-
-    def testSetRDateCount(self):
-        # Test that the count is updated when an rdate is added
-        rrset = rruleset(cache=False)
-        for cache in (True, False):
-            rrset = rruleset(cache=cache)
-            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH,
-                              dtstart=datetime(1983, 4, 1)))
-            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR,
-                              dtstart=datetime(1991, 6, 3)))
-
-            # Check the length twice - first one sets a cache, second reads it
-            self.assertEqual(rrset.count(), 6)
-            self.assertEqual(rrset.count(), 6)
-
-            # This should invalidate the cache and force an update
-            rrset.rdate(datetime(1993, 2, 14))
-
-            self.assertEqual(rrset.count(), 7)
-            self.assertEqual(rrset.count(), 7)
-
-    def testSetExRuleCount(self):
-        # Test that the count is updated when an exrule is added
-        rrset = rruleset(cache=False)
-        for cache in (True, False):
-            rrset = rruleset(cache=cache)
-            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH,
-                              dtstart=datetime(1983, 4, 1)))
-            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR,
-                              dtstart=datetime(1991, 6, 3)))
-
-            # Check the length twice - first one sets a cache, second reads it
-            self.assertEqual(rrset.count(), 6)
-            self.assertEqual(rrset.count(), 6)
-
-            # This should invalidate the cache and force an update
-            rrset.exrule(rrule(WEEKLY, count=2, interval=2,
-                               dtstart=datetime(1991, 6, 14)))
-
-            self.assertEqual(rrset.count(), 4)
-            self.assertEqual(rrset.count(), 4)
-
-    def testSetExDateCount(self):
-        # Test that the count is updated when an rdate is added
-        for cache in (True, False):
-            rrset = rruleset(cache=cache)
-            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH,
-                              dtstart=datetime(1983, 4, 1)))
-            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR,
-                              dtstart=datetime(1991, 6, 3)))
-
-            # Check the length twice - first one sets a cache, second reads it
-            self.assertEqual(rrset.count(), 6)
-            self.assertEqual(rrset.count(), 6)
-
-            # This should invalidate the cache and force an update
-            rrset.exdate(datetime(1991, 6, 28))
-
-            self.assertEqual(rrset.count(), 5)
-            self.assertEqual(rrset.count(), 5)
-
-
-class WeekdayTest(unittest.TestCase):
-    def testInvalidNthWeekday(self):
-        with self.assertRaises(ValueError):
-            FR(0)
-
-    def testWeekdayCallable(self):
-        # Calling a weekday instance generates a new weekday instance with the
-        # value of n changed.
-        from dateutil.rrule import weekday
-        self.assertEqual(MO(1), weekday(0, 1))
-
-        # Calling a weekday instance with the identical n returns the original
-        # object
-        FR_3 = weekday(4, 3)
-        self.assertIs(FR_3(3), FR_3)
-
-    def testWeekdayEquality(self):
-        # Two weekday objects are not equal if they have different values for n
-        self.assertNotEqual(TH, TH(-1))
-        self.assertNotEqual(SA(3), SA(2))
-
-    def testWeekdayEqualitySubclass(self):
-        # Two weekday objects equal if their "weekday" and "n" attributes are
-        # available and the same
-        class BasicWeekday(object):
-            def __init__(self, weekday):
-                self.weekday = weekday
-
-        class BasicNWeekday(BasicWeekday):
-            def __init__(self, weekday, n=None):
-                super(BasicNWeekday, self).__init__(weekday)
-                self.n = n
-
-        MO_Basic = BasicWeekday(0)
-
-        self.assertNotEqual(MO, MO_Basic)
-        self.assertNotEqual(MO(1), MO_Basic)
-
-        TU_BasicN = BasicNWeekday(1)
-
-        self.assertEqual(TU, TU_BasicN)
-        self.assertNotEqual(TU(3), TU_BasicN)
-
-        WE_Basic3 = BasicNWeekday(2, 3)
-        self.assertEqual(WE(3), WE_Basic3)
-        self.assertNotEqual(WE(2), WE_Basic3)
-
-    def testWeekdayReprNoN(self):
-        no_n_reprs = ('MO', 'TU', 'WE', 'TH', 'FR', 'SA', 'SU')
-        no_n_wdays = (MO, TU, WE, TH, FR, SA, SU)
-
-        for repstr, wday in zip(no_n_reprs, no_n_wdays):
-            self.assertEqual(repr(wday), repstr)
-
-    def testWeekdayReprWithN(self):
-        with_n_reprs = ('WE(+1)', 'TH(-2)', 'SU(+3)')
-        with_n_wdays = (WE(1), TH(-2), SU(+3))
-
-        for repstr, wday in zip(with_n_reprs, with_n_wdays):
-            self.assertEqual(repr(wday), repstr)
+            self._rrulestr_reverse_test(rrule(MINUTELY, 
+                                  count=long(2), 
+                                  interval=long(2), 
+                                  bymonth=long(2), 
+                                  byweekday=long(3), 
+                                  byhour=long(6), 
+                                  byminute=long(6), 
+                                  bysecond=long(6), 
+                                  dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+            self._rrulestr_reverse_test(rrule(YEARLY, 
+                                  count=long(2), 
+                                  bymonthday=long(5), 
+                                  byweekno=long(2), 
+                                  dtstart=datetime(1997, 9, 2, 9, 0))) 
+ 
+    def testReplaceIfSet(self): 
+        rr = rrule(YEARLY, 
+                   count=1, 
+                   bymonthday=5, 
+                   dtstart=datetime(1997, 1, 1)) 
+        newrr = rr.replace(bymonthday=6) 
+        self.assertEqual(list(rr), [datetime(1997, 1, 5)]) 
+        self.assertEqual(list(newrr), 
+                             [datetime(1997, 1, 6)]) 
+ 
+    def testReplaceIfNotSet(self): 
+        rr = rrule(YEARLY, 
+           count=1, 
+           dtstart=datetime(1997, 1, 1)) 
+        newrr = rr.replace(bymonthday=6) 
+        self.assertEqual(list(rr), [datetime(1997, 1, 1)]) 
+        self.assertEqual(list(newrr), 
+                             [datetime(1997, 1, 6)]) 
+ 
+ 
+@pytest.mark.rrule 
+@freeze_time(datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC)) 
+def test_generated_aware_dtstart(): 
+    dtstart_exp = datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC) 
+    UNTIL = datetime(2018, 3, 6, 8, 0, tzinfo=tz.UTC) 
+ 
+    rule_without_dtstart = rrule(freq=HOURLY, until=UNTIL) 
+    rule_with_dtstart = rrule(freq=HOURLY, dtstart=dtstart_exp, until=UNTIL) 
+    assert list(rule_without_dtstart) == list(rule_with_dtstart) 
+ 
+ 
+@pytest.mark.rrule 
+@pytest.mark.rrulestr 
+@pytest.mark.xfail(reason="rrulestr loses time zone, gh issue #637") 
+@freeze_time(datetime(2018, 3, 6, 5, 36, tzinfo=tz.UTC)) 
+def test_generated_aware_dtstart_rrulestr(): 
+    rrule_without_dtstart = rrule(freq=HOURLY, 
+                                  until=datetime(2018, 3, 6, 8, 0, 
+                                                 tzinfo=tz.UTC)) 
+    rrule_r = rrulestr(str(rrule_without_dtstart)) 
+ 
+    assert list(rrule_r) == list(rrule_without_dtstart) 
+ 
+ 
+@pytest.mark.rruleset 
+class RRuleSetTest(unittest.TestCase): 
+    def testSet(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testSetDate(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=1, byweekday=TU, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.rdate(datetime(1997, 9, 4, 9)) 
+        rrset.rdate(datetime(1997, 9, 9, 9)) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testSetExRule(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH), 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testSetExDate(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH), 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.exdate(datetime(1997, 9, 4, 9)) 
+        rrset.exdate(datetime(1997, 9, 11, 9)) 
+        rrset.exdate(datetime(1997, 9, 18, 9)) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testSetExDateRevOrder(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(MONTHLY, count=5, bymonthday=10, 
+                          dtstart=datetime(2004, 1, 1, 9, 0))) 
+        rrset.exdate(datetime(2004, 4, 10, 9, 0)) 
+        rrset.exdate(datetime(2004, 2, 10, 9, 0)) 
+        self.assertEqual(list(rrset), 
+                         [datetime(2004, 1, 10, 9, 0), 
+                          datetime(2004, 3, 10, 9, 0), 
+                          datetime(2004, 5, 10, 9, 0)]) 
+ 
+    def testSetDateAndExDate(self): 
+        rrset = rruleset() 
+        rrset.rdate(datetime(1997, 9, 2, 9)) 
+        rrset.rdate(datetime(1997, 9, 4, 9)) 
+        rrset.rdate(datetime(1997, 9, 9, 9)) 
+        rrset.rdate(datetime(1997, 9, 11, 9)) 
+        rrset.rdate(datetime(1997, 9, 16, 9)) 
+        rrset.rdate(datetime(1997, 9, 18, 9)) 
+        rrset.exdate(datetime(1997, 9, 4, 9)) 
+        rrset.exdate(datetime(1997, 9, 11, 9)) 
+        rrset.exdate(datetime(1997, 9, 18, 9)) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testSetDateAndExRule(self): 
+        rrset = rruleset() 
+        rrset.rdate(datetime(1997, 9, 2, 9)) 
+        rrset.rdate(datetime(1997, 9, 4, 9)) 
+        rrset.rdate(datetime(1997, 9, 9, 9)) 
+        rrset.rdate(datetime(1997, 9, 11, 9)) 
+        rrset.rdate(datetime(1997, 9, 16, 9)) 
+        rrset.rdate(datetime(1997, 9, 18, 9)) 
+        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH, 
+                           dtstart=datetime(1997, 9, 2, 9, 0))) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0), 
+                          datetime(1997, 9, 16, 9, 0)]) 
+ 
+    def testSetCount(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=6, byweekday=(TU, TH), 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.exrule(rrule(YEARLY, count=3, byweekday=TH, 
+                           dtstart=datetime(1997, 9, 2, 9, 0))) 
+        self.assertEqual(rrset.count(), 3) 
+ 
+    def testSetCachePre(self): 
+        rrset = rruleset() 
+        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testSetCachePost(self): 
+        rrset = rruleset(cache=True) 
+        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        for x in rrset: pass 
+        self.assertEqual(list(rrset), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testSetCachePostInternal(self): 
+        rrset = rruleset(cache=True) 
+        rrset.rrule(rrule(YEARLY, count=2, byweekday=TU, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        rrset.rrule(rrule(YEARLY, count=1, byweekday=TH, 
+                          dtstart=datetime(1997, 9, 2, 9, 0))) 
+        for x in rrset: pass 
+        self.assertEqual(list(rrset._cache), 
+                         [datetime(1997, 9, 2, 9, 0), 
+                          datetime(1997, 9, 4, 9, 0), 
+                          datetime(1997, 9, 9, 9, 0)]) 
+ 
+    def testSetRRuleCount(self): 
+        # Test that the count is updated when an rrule is added 
+        rrset = rruleset(cache=False) 
+        for cache in (True, False): 
+            rrset = rruleset(cache=cache) 
+            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH, 
+                              dtstart=datetime(1983, 4, 1))) 
+            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR, 
+                              dtstart=datetime(1991, 6, 3))) 
+ 
+            # Check the length twice - first one sets a cache, second reads it 
+            self.assertEqual(rrset.count(), 6) 
+            self.assertEqual(rrset.count(), 6) 
+ 
+            # This should invalidate the cache and force an update 
+            rrset.rrule(rrule(MONTHLY, count=3, dtstart=datetime(1994, 1, 3))) 
+ 
+            self.assertEqual(rrset.count(), 9) 
+            self.assertEqual(rrset.count(), 9) 
+ 
+    def testSetRDateCount(self): 
+        # Test that the count is updated when an rdate is added 
+        rrset = rruleset(cache=False) 
+        for cache in (True, False): 
+            rrset = rruleset(cache=cache) 
+            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH, 
+                              dtstart=datetime(1983, 4, 1))) 
+            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR, 
+                              dtstart=datetime(1991, 6, 3))) 
+ 
+            # Check the length twice - first one sets a cache, second reads it 
+            self.assertEqual(rrset.count(), 6) 
+            self.assertEqual(rrset.count(), 6) 
+ 
+            # This should invalidate the cache and force an update 
+            rrset.rdate(datetime(1993, 2, 14)) 
+ 
+            self.assertEqual(rrset.count(), 7) 
+            self.assertEqual(rrset.count(), 7) 
+ 
+    def testSetExRuleCount(self): 
+        # Test that the count is updated when an exrule is added 
+        rrset = rruleset(cache=False) 
+        for cache in (True, False): 
+            rrset = rruleset(cache=cache) 
+            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH, 
+                              dtstart=datetime(1983, 4, 1))) 
+            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR, 
+                              dtstart=datetime(1991, 6, 3))) 
+ 
+            # Check the length twice - first one sets a cache, second reads it 
+            self.assertEqual(rrset.count(), 6) 
+            self.assertEqual(rrset.count(), 6) 
+ 
+            # This should invalidate the cache and force an update 
+            rrset.exrule(rrule(WEEKLY, count=2, interval=2, 
+                               dtstart=datetime(1991, 6, 14))) 
+ 
+            self.assertEqual(rrset.count(), 4) 
+            self.assertEqual(rrset.count(), 4) 
+ 
+    def testSetExDateCount(self): 
+        # Test that the count is updated when an rdate is added 
+        for cache in (True, False): 
+            rrset = rruleset(cache=cache) 
+            rrset.rrule(rrule(YEARLY, count=2, byweekday=TH, 
+                              dtstart=datetime(1983, 4, 1))) 
+            rrset.rrule(rrule(WEEKLY, count=4, byweekday=FR, 
+                              dtstart=datetime(1991, 6, 3))) 
+ 
+            # Check the length twice - first one sets a cache, second reads it 
+            self.assertEqual(rrset.count(), 6) 
+            self.assertEqual(rrset.count(), 6) 
+ 
+            # This should invalidate the cache and force an update 
+            rrset.exdate(datetime(1991, 6, 28)) 
+ 
+            self.assertEqual(rrset.count(), 5) 
+            self.assertEqual(rrset.count(), 5) 
+ 
+ 
+class WeekdayTest(unittest.TestCase): 
+    def testInvalidNthWeekday(self): 
+        with self.assertRaises(ValueError): 
+            FR(0) 
+ 
+    def testWeekdayCallable(self): 
+        # Calling a weekday instance generates a new weekday instance with the 
+        # value of n changed. 
+        from dateutil.rrule import weekday 
+        self.assertEqual(MO(1), weekday(0, 1)) 
+ 
+        # Calling a weekday instance with the identical n returns the original 
+        # object 
+        FR_3 = weekday(4, 3) 
+        self.assertIs(FR_3(3), FR_3) 
+ 
+    def testWeekdayEquality(self): 
+        # Two weekday objects are not equal if they have different values for n 
+        self.assertNotEqual(TH, TH(-1)) 
+        self.assertNotEqual(SA(3), SA(2)) 
+ 
+    def testWeekdayEqualitySubclass(self): 
+        # Two weekday objects equal if their "weekday" and "n" attributes are 
+        # available and the same 
+        class BasicWeekday(object): 
+            def __init__(self, weekday): 
+                self.weekday = weekday 
+ 
+        class BasicNWeekday(BasicWeekday): 
+            def __init__(self, weekday, n=None): 
+                super(BasicNWeekday, self).__init__(weekday) 
+                self.n = n 
+ 
+        MO_Basic = BasicWeekday(0) 
+ 
+        self.assertNotEqual(MO, MO_Basic) 
+        self.assertNotEqual(MO(1), MO_Basic) 
+ 
+        TU_BasicN = BasicNWeekday(1) 
+ 
+        self.assertEqual(TU, TU_BasicN) 
+        self.assertNotEqual(TU(3), TU_BasicN) 
+ 
+        WE_Basic3 = BasicNWeekday(2, 3) 
+        self.assertEqual(WE(3), WE_Basic3) 
+        self.assertNotEqual(WE(2), WE_Basic3) 
+ 
+    def testWeekdayReprNoN(self): 
+        no_n_reprs = ('MO', 'TU', 'WE', 'TH', 'FR', 'SA', 'SU') 
+        no_n_wdays = (MO, TU, WE, TH, FR, SA, SU) 
+ 
+        for repstr, wday in zip(no_n_reprs, no_n_wdays): 
+            self.assertEqual(repr(wday), repstr) 
+ 
+    def testWeekdayReprWithN(self): 
+        with_n_reprs = ('WE(+1)', 'TH(-2)', 'SU(+3)') 
+        with_n_wdays = (WE(1), TH(-2), SU(+3)) 
+ 
+        for repstr, wday in zip(with_n_reprs, with_n_wdays): 
+            self.assertEqual(repr(wday), repstr) 
diff --git a/contrib/python/dateutil/dateutil/test/test_tz.py b/contrib/python/dateutil/dateutil/test/test_tz.py
index e5e4772d9a..926e730b30 100644
--- a/contrib/python/dateutil/dateutil/test/test_tz.py
+++ b/contrib/python/dateutil/dateutil/test/test_tz.py
@@ -1,743 +1,743 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from ._common import PicklableMixin
-from ._common import TZEnvContext, TZWinContext
-from ._common import ComparesEqual
-
-from datetime import datetime, timedelta
-from datetime import time as dt_time
-from datetime import tzinfo
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
+from ._common import PicklableMixin 
+from ._common import TZEnvContext, TZWinContext 
+from ._common import ComparesEqual 
+ 
+from datetime import datetime, timedelta 
+from datetime import time as dt_time 
+from datetime import tzinfo 
 from six import PY2
 from io import BytesIO, StringIO
-import unittest
-
-import sys
-import base64
-import copy
+import unittest 
+ 
+import sys 
+import base64 
+import copy 
 import gc
 import weakref
-
-from functools import partial
-
-IS_WIN = sys.platform.startswith('win')
-
-import pytest
-
-# dateutil imports
-from dateutil.relativedelta import relativedelta, SU, TH
-from dateutil.parser import parse
-from dateutil import tz as tz
-from dateutil import zoneinfo
-
-try:
-    from dateutil import tzwin
-except ImportError as e:
-    if IS_WIN:
-        raise e
-    else:
-        pass
-
-MISSING_TARBALL = ("This test fails if you don't have the dateutil "
-                   "timezone file installed. Please read the README")
-
-TZFILE_EST5EDT = b"""
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-AEVQVAAAAAABAAAAAQ==
-"""
-
-EUROPE_HELSINKI = b"""
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-"""
-
-NEW_YORK = b"""
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-ABU2jBAVAAAAFkO3G5YAAAAXAAAAAQAAAAE=
-"""
-
-TZICAL_EST5EDT = """
-BEGIN:VTIMEZONE
-TZID:US-Eastern
-LAST-MODIFIED:19870101T000000Z
-TZURL:http://zones.stds_r_us.net/tz/US-Eastern
-BEGIN:STANDARD
-DTSTART:19671029T020000
-RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
-TZOFFSETFROM:-0400
-TZOFFSETTO:-0500
-TZNAME:EST
-END:STANDARD
-BEGIN:DAYLIGHT
-DTSTART:19870405T020000
-RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
-TZOFFSETFROM:-0500
-TZOFFSETTO:-0400
-TZNAME:EDT
-END:DAYLIGHT
-END:VTIMEZONE
-"""
-
-TZICAL_PST8PDT = """
-BEGIN:VTIMEZONE
-TZID:US-Pacific
-LAST-MODIFIED:19870101T000000Z
-BEGIN:STANDARD
-DTSTART:19671029T020000
-RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
-TZOFFSETFROM:-0700
-TZOFFSETTO:-0800
-TZNAME:PST
-END:STANDARD
-BEGIN:DAYLIGHT
-DTSTART:19870405T020000
-RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
-TZOFFSETFROM:-0800
-TZOFFSETTO:-0700
-TZNAME:PDT
-END:DAYLIGHT
-END:VTIMEZONE
-"""
-
-EST_TUPLE = ('EST', timedelta(hours=-5), timedelta(hours=0))
-EDT_TUPLE = ('EDT', timedelta(hours=-4), timedelta(hours=1))
-
+ 
+from functools import partial 
+ 
+IS_WIN = sys.platform.startswith('win') 
+ 
+import pytest 
+ 
+# dateutil imports 
+from dateutil.relativedelta import relativedelta, SU, TH 
+from dateutil.parser import parse 
+from dateutil import tz as tz 
+from dateutil import zoneinfo 
+ 
+try: 
+    from dateutil import tzwin 
+except ImportError as e: 
+    if IS_WIN: 
+        raise e 
+    else: 
+        pass 
+ 
+MISSING_TARBALL = ("This test fails if you don't have the dateutil " 
+                   "timezone file installed. Please read the README") 
+ 
+TZFILE_EST5EDT = b""" 
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+AEVQVAAAAAABAAAAAQ== 
+""" 
+ 
+EUROPE_HELSINKI = b""" 
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+""" 
+ 
+NEW_YORK = b""" 
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+zn0fobFtIHYA/SGBk20iVeL+I2qv7iQ1xP4lSpHuJhWm/ycqc+8n/sOAKQpV8CnepYAq6jfxK76H 
+gSzTVHItnmmCLrM2cy9+S4MwkxhzMWdoBDJy+nQzR0oENFLcdTUnLAU2Mr51NwcOBjgb2vY45vAG 
+Ofu89jrG0gY72572PK/uhj27gPY+j9CGP5ti9kBvsoZBhH92Qk+UhkNkYXZEL3aHRURDd0XzqQdH 
+LV/3R9OLB0kNQfdJs20HSu0j90uciYdM1kB3TXxrh062IndPXE2HUJYEd1E8L4dSdeZ3UxwRh1RV 
+yHdU+/OHVjWqd1blEAdYHsb3WMTyB1n+qPdapNQHW96K91yEtgddvmz3XmSYB1+eTvdgTbSHYYdr 
+d2ItlodjZ013ZA14h2VHL3dl7VqHZycRd2fNPIdpBvN3aa0eh2rm1XdrljsHbM/x9212HQdur9P3 
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+fmeHfbged35eSYd/mAB3AAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQAB 
+AAEAAQABAgMBAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQAB 
+AAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEA 
+AQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQABAAEAAQAB 
+AAEAAQABAAEAAQABAAEAAQABAAEAAf//x8ABAP//ubAABP//x8ABCP//x8ABDEVEVABFU1QARVdU 
+AEVQVAAEslgAAAAAAQWk7AEAAAACB4YfggAAAAMJZ1MDAAAABAtIhoQAAAAFDSsLhQAAAAYPDD8G 
+AAAABxDtcocAAAAIEs6mCAAAAAkVn8qJAAAACheA/goAAAALGWIxiwAAAAwdJeoMAAAADSHa5Q0A 
+AAAOJZ6djgAAAA8nf9EPAAAAECpQ9ZAAAAARLDIpEQAAABIuE1ySAAAAEzDnJBMAAAAUM7hIlAAA 
+ABU2jBAVAAAAFkO3G5YAAAAXAAAAAQAAAAE= 
+""" 
+ 
+TZICAL_EST5EDT = """ 
+BEGIN:VTIMEZONE 
+TZID:US-Eastern 
+LAST-MODIFIED:19870101T000000Z 
+TZURL:http://zones.stds_r_us.net/tz/US-Eastern 
+BEGIN:STANDARD 
+DTSTART:19671029T020000 
+RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 
+TZOFFSETFROM:-0400 
+TZOFFSETTO:-0500 
+TZNAME:EST 
+END:STANDARD 
+BEGIN:DAYLIGHT 
+DTSTART:19870405T020000 
+RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 
+TZOFFSETFROM:-0500 
+TZOFFSETTO:-0400 
+TZNAME:EDT 
+END:DAYLIGHT 
+END:VTIMEZONE 
+""" 
+ 
+TZICAL_PST8PDT = """ 
+BEGIN:VTIMEZONE 
+TZID:US-Pacific 
+LAST-MODIFIED:19870101T000000Z 
+BEGIN:STANDARD 
+DTSTART:19671029T020000 
+RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 
+TZOFFSETFROM:-0700 
+TZOFFSETTO:-0800 
+TZNAME:PST 
+END:STANDARD 
+BEGIN:DAYLIGHT 
+DTSTART:19870405T020000 
+RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 
+TZOFFSETFROM:-0800 
+TZOFFSETTO:-0700 
+TZNAME:PDT 
+END:DAYLIGHT 
+END:VTIMEZONE 
+""" 
+ 
+EST_TUPLE = ('EST', timedelta(hours=-5), timedelta(hours=0)) 
+EDT_TUPLE = ('EDT', timedelta(hours=-4), timedelta(hours=1)) 
+ 
 SUPPORTS_SUB_MINUTE_OFFSETS = sys.version_info >= (3, 6)
-
-
-###
-# Helper functions
-def get_timezone_tuple(dt):
-    """Retrieve a (tzname, utcoffset, dst) tuple for a given DST"""
-    return dt.tzname(), dt.utcoffset(), dt.dst()
-
-
-###
-# Mix-ins
-class context_passthrough(object):
-    def __init__(*args, **kwargs):
-        pass
-
-    def __enter__(*args, **kwargs):
-        pass
-
-    def __exit__(*args, **kwargs):
-        pass
-
-
-class TzFoldMixin(object):
-    """ Mix-in class for testing ambiguous times """
-    def gettz(self, tzname):
-        raise NotImplementedError
-
-    def _get_tzname(self, tzname):
-        return tzname
-
-    def _gettz_context(self, tzname):
-        return context_passthrough()
-
-    def testFoldPositiveUTCOffset(self):
-        # Test that we can resolve ambiguous times
-        tzname = self._get_tzname('Australia/Sydney')
-
-        with self._gettz_context(tzname):
-            SYD = self.gettz(tzname)
-
+ 
+
+### 
+# Helper functions 
+def get_timezone_tuple(dt): 
+    """Retrieve a (tzname, utcoffset, dst) tuple for a given DST""" 
+    return dt.tzname(), dt.utcoffset(), dt.dst() 
+ 
+ 
+### 
+# Mix-ins 
+class context_passthrough(object): 
+    def __init__(*args, **kwargs): 
+        pass 
+ 
+    def __enter__(*args, **kwargs): 
+        pass 
+ 
+    def __exit__(*args, **kwargs): 
+        pass 
+ 
+ 
+class TzFoldMixin(object): 
+    """ Mix-in class for testing ambiguous times """ 
+    def gettz(self, tzname): 
+        raise NotImplementedError 
+ 
+    def _get_tzname(self, tzname): 
+        return tzname 
+ 
+    def _gettz_context(self, tzname): 
+        return context_passthrough() 
+ 
+    def testFoldPositiveUTCOffset(self): 
+        # Test that we can resolve ambiguous times 
+        tzname = self._get_tzname('Australia/Sydney') 
+ 
+        with self._gettz_context(tzname): 
+            SYD = self.gettz(tzname) 
+ 
             t0_u = datetime(2012, 3, 31, 15, 30, tzinfo=tz.UTC)  # AEST
             t1_u = datetime(2012, 3, 31, 16, 30, tzinfo=tz.UTC)  # AEDT
-
-            t0_syd0 = t0_u.astimezone(SYD)
-            t1_syd1 = t1_u.astimezone(SYD)
-
-            self.assertEqual(t0_syd0.replace(tzinfo=None),
-                             datetime(2012, 4, 1, 2, 30))
-
-            self.assertEqual(t1_syd1.replace(tzinfo=None),
-                             datetime(2012, 4, 1, 2, 30))
-
-            self.assertEqual(t0_syd0.utcoffset(), timedelta(hours=11))
-            self.assertEqual(t1_syd1.utcoffset(), timedelta(hours=10))
-
-    def testGapPositiveUTCOffset(self):
-        # Test that we don't have a problem around gaps.
-        tzname = self._get_tzname('Australia/Sydney')
-
-        with self._gettz_context(tzname):
-            SYD = self.gettz(tzname)
-
+ 
+            t0_syd0 = t0_u.astimezone(SYD) 
+            t1_syd1 = t1_u.astimezone(SYD) 
+ 
+            self.assertEqual(t0_syd0.replace(tzinfo=None), 
+                             datetime(2012, 4, 1, 2, 30)) 
+ 
+            self.assertEqual(t1_syd1.replace(tzinfo=None), 
+                             datetime(2012, 4, 1, 2, 30)) 
+ 
+            self.assertEqual(t0_syd0.utcoffset(), timedelta(hours=11)) 
+            self.assertEqual(t1_syd1.utcoffset(), timedelta(hours=10)) 
+ 
+    def testGapPositiveUTCOffset(self): 
+        # Test that we don't have a problem around gaps. 
+        tzname = self._get_tzname('Australia/Sydney') 
+ 
+        with self._gettz_context(tzname): 
+            SYD = self.gettz(tzname) 
+ 
             t0_u = datetime(2012, 10, 6, 15, 30, tzinfo=tz.UTC)  # AEST
             t1_u = datetime(2012, 10, 6, 16, 30, tzinfo=tz.UTC)  # AEDT
-
-            t0 = t0_u.astimezone(SYD)
-            t1 = t1_u.astimezone(SYD)
-
-            self.assertEqual(t0.replace(tzinfo=None),
-                             datetime(2012, 10, 7, 1, 30))
-
-            self.assertEqual(t1.replace(tzinfo=None),
-                             datetime(2012, 10, 7, 3, 30))
-
-            self.assertEqual(t0.utcoffset(), timedelta(hours=10))
-            self.assertEqual(t1.utcoffset(), timedelta(hours=11))
-
-    def testFoldNegativeUTCOffset(self):
-            # Test that we can resolve ambiguous times
-            tzname = self._get_tzname('America/Toronto')
-
-            with self._gettz_context(tzname):
-                TOR = self.gettz(tzname)
-
+ 
+            t0 = t0_u.astimezone(SYD) 
+            t1 = t1_u.astimezone(SYD) 
+ 
+            self.assertEqual(t0.replace(tzinfo=None), 
+                             datetime(2012, 10, 7, 1, 30)) 
+ 
+            self.assertEqual(t1.replace(tzinfo=None), 
+                             datetime(2012, 10, 7, 3, 30)) 
+ 
+            self.assertEqual(t0.utcoffset(), timedelta(hours=10)) 
+            self.assertEqual(t1.utcoffset(), timedelta(hours=11)) 
+ 
+    def testFoldNegativeUTCOffset(self): 
+            # Test that we can resolve ambiguous times 
+            tzname = self._get_tzname('America/Toronto') 
+ 
+            with self._gettz_context(tzname): 
+                TOR = self.gettz(tzname) 
+ 
                 t0_u = datetime(2011, 11, 6, 5, 30, tzinfo=tz.UTC)
                 t1_u = datetime(2011, 11, 6, 6, 30, tzinfo=tz.UTC)
-
-                t0_tor = t0_u.astimezone(TOR)
-                t1_tor = t1_u.astimezone(TOR)
-
-                self.assertEqual(t0_tor.replace(tzinfo=None),
-                                 datetime(2011, 11, 6, 1, 30))
-
-                self.assertEqual(t1_tor.replace(tzinfo=None),
-                                 datetime(2011, 11, 6, 1, 30))
-
-                self.assertNotEqual(t0_tor.tzname(), t1_tor.tzname())
-                self.assertEqual(t0_tor.utcoffset(), timedelta(hours=-4.0))
-                self.assertEqual(t1_tor.utcoffset(), timedelta(hours=-5.0))
-
-    def testGapNegativeUTCOffset(self):
-        # Test that we don't have a problem around gaps.
-        tzname = self._get_tzname('America/Toronto')
-
-        with self._gettz_context(tzname):
-            TOR = self.gettz(tzname)
-
+ 
+                t0_tor = t0_u.astimezone(TOR) 
+                t1_tor = t1_u.astimezone(TOR) 
+ 
+                self.assertEqual(t0_tor.replace(tzinfo=None), 
+                                 datetime(2011, 11, 6, 1, 30)) 
+ 
+                self.assertEqual(t1_tor.replace(tzinfo=None), 
+                                 datetime(2011, 11, 6, 1, 30)) 
+ 
+                self.assertNotEqual(t0_tor.tzname(), t1_tor.tzname()) 
+                self.assertEqual(t0_tor.utcoffset(), timedelta(hours=-4.0)) 
+                self.assertEqual(t1_tor.utcoffset(), timedelta(hours=-5.0)) 
+ 
+    def testGapNegativeUTCOffset(self): 
+        # Test that we don't have a problem around gaps. 
+        tzname = self._get_tzname('America/Toronto') 
+ 
+        with self._gettz_context(tzname): 
+            TOR = self.gettz(tzname) 
+ 
             t0_u = datetime(2011, 3, 13, 6, 30, tzinfo=tz.UTC)
             t1_u = datetime(2011, 3, 13, 7, 30, tzinfo=tz.UTC)
-
-            t0 = t0_u.astimezone(TOR)
-            t1 = t1_u.astimezone(TOR)
-
-            self.assertEqual(t0.replace(tzinfo=None),
-                             datetime(2011, 3, 13, 1, 30))
-
-            self.assertEqual(t1.replace(tzinfo=None),
-                             datetime(2011, 3, 13, 3, 30))
-
-            self.assertNotEqual(t0, t1)
-            self.assertEqual(t0.utcoffset(), timedelta(hours=-5.0))
-            self.assertEqual(t1.utcoffset(), timedelta(hours=-4.0))
-
-    def testFoldLondon(self):
-        tzname = self._get_tzname('Europe/London')
-
-        with self._gettz_context(tzname):
-            LON = self.gettz(tzname)
+ 
+            t0 = t0_u.astimezone(TOR) 
+            t1 = t1_u.astimezone(TOR) 
+ 
+            self.assertEqual(t0.replace(tzinfo=None), 
+                             datetime(2011, 3, 13, 1, 30)) 
+ 
+            self.assertEqual(t1.replace(tzinfo=None), 
+                             datetime(2011, 3, 13, 3, 30)) 
+ 
+            self.assertNotEqual(t0, t1) 
+            self.assertEqual(t0.utcoffset(), timedelta(hours=-5.0)) 
+            self.assertEqual(t1.utcoffset(), timedelta(hours=-4.0)) 
+ 
+    def testFoldLondon(self): 
+        tzname = self._get_tzname('Europe/London') 
+ 
+        with self._gettz_context(tzname): 
+            LON = self.gettz(tzname) 
             UTC = tz.UTC
-
-            t0_u = datetime(2013, 10, 27, 0, 30, tzinfo=UTC)   # BST
-            t1_u = datetime(2013, 10, 27, 1, 30, tzinfo=UTC)   # GMT
-
-            t0 = t0_u.astimezone(LON)
-            t1 = t1_u.astimezone(LON)
-
-            self.assertEqual(t0.replace(tzinfo=None),
-                             datetime(2013, 10, 27, 1, 30))
-
-            self.assertEqual(t1.replace(tzinfo=None),
-                             datetime(2013, 10, 27, 1, 30))
-
-            self.assertEqual(t0.utcoffset(), timedelta(hours=1))
-            self.assertEqual(t1.utcoffset(), timedelta(hours=0))
-
-    def testFoldIndependence(self):
-        tzname = self._get_tzname('America/New_York')
-
-        with self._gettz_context(tzname):
-            NYC = self.gettz(tzname)
+ 
+            t0_u = datetime(2013, 10, 27, 0, 30, tzinfo=UTC)   # BST 
+            t1_u = datetime(2013, 10, 27, 1, 30, tzinfo=UTC)   # GMT 
+ 
+            t0 = t0_u.astimezone(LON) 
+            t1 = t1_u.astimezone(LON) 
+ 
+            self.assertEqual(t0.replace(tzinfo=None), 
+                             datetime(2013, 10, 27, 1, 30)) 
+ 
+            self.assertEqual(t1.replace(tzinfo=None), 
+                             datetime(2013, 10, 27, 1, 30)) 
+ 
+            self.assertEqual(t0.utcoffset(), timedelta(hours=1)) 
+            self.assertEqual(t1.utcoffset(), timedelta(hours=0)) 
+ 
+    def testFoldIndependence(self): 
+        tzname = self._get_tzname('America/New_York') 
+ 
+        with self._gettz_context(tzname): 
+            NYC = self.gettz(tzname) 
             UTC = tz.UTC
-            hour = timedelta(hours=1)
-
-            # Firmly 2015-11-01 0:30 EDT-4
-            pre_dst = datetime(2015, 11, 1, 0, 30, tzinfo=NYC)
-
-            # Ambiguous between 2015-11-01 1:30 EDT-4 and 2015-11-01 1:30 EST-5
-            in_dst = pre_dst + hour
-            in_dst_tzname_0 = in_dst.tzname()     # Stash the tzname - EDT
-
-            # Doing the arithmetic in UTC creates a date that is unambiguously
-            # 2015-11-01 1:30 EDT-5
-            in_dst_via_utc = (pre_dst.astimezone(UTC) + 2*hour).astimezone(NYC)
-
-            # Make sure the dates are actually ambiguous
-            self.assertEqual(in_dst, in_dst_via_utc)
-
-            # Make sure we got the right folding behavior
-            self.assertNotEqual(in_dst_via_utc.tzname(), in_dst_tzname_0)
-
-            # Now check to make sure in_dst's tzname hasn't changed
-            self.assertEqual(in_dst_tzname_0, in_dst.tzname())
-
-    def testInZoneFoldEquality(self):
-        # Two datetimes in the same zone are considered to be equal if their
-        # wall times are equal, even if they have different absolute times.
-
-        tzname = self._get_tzname('America/New_York')
-
-        with self._gettz_context(tzname):
-            NYC = self.gettz(tzname)
+            hour = timedelta(hours=1) 
+ 
+            # Firmly 2015-11-01 0:30 EDT-4 
+            pre_dst = datetime(2015, 11, 1, 0, 30, tzinfo=NYC) 
+ 
+            # Ambiguous between 2015-11-01 1:30 EDT-4 and 2015-11-01 1:30 EST-5 
+            in_dst = pre_dst + hour 
+            in_dst_tzname_0 = in_dst.tzname()     # Stash the tzname - EDT 
+ 
+            # Doing the arithmetic in UTC creates a date that is unambiguously 
+            # 2015-11-01 1:30 EDT-5 
+            in_dst_via_utc = (pre_dst.astimezone(UTC) + 2*hour).astimezone(NYC) 
+ 
+            # Make sure the dates are actually ambiguous 
+            self.assertEqual(in_dst, in_dst_via_utc) 
+ 
+            # Make sure we got the right folding behavior 
+            self.assertNotEqual(in_dst_via_utc.tzname(), in_dst_tzname_0) 
+ 
+            # Now check to make sure in_dst's tzname hasn't changed 
+            self.assertEqual(in_dst_tzname_0, in_dst.tzname()) 
+ 
+    def testInZoneFoldEquality(self): 
+        # Two datetimes in the same zone are considered to be equal if their 
+        # wall times are equal, even if they have different absolute times. 
+ 
+        tzname = self._get_tzname('America/New_York') 
+ 
+        with self._gettz_context(tzname): 
+            NYC = self.gettz(tzname) 
             UTC = tz.UTC
-
-            dt0 = datetime(2011, 11, 6, 1, 30, tzinfo=NYC)
-            dt1 = tz.enfold(dt0, fold=1)
-
-            # Make sure these actually represent different times
-            self.assertNotEqual(dt0.astimezone(UTC), dt1.astimezone(UTC))
-
-            # Test that they compare equal
-            self.assertEqual(dt0, dt1)
-
-    def _test_ambiguous_time(self, dt, tzid, ambiguous):
-        # This is a test to check that the individual is_ambiguous values
-        # on the _tzinfo subclasses work.
-        tzname = self._get_tzname(tzid)
-
-        with self._gettz_context(tzname):
-            tzi = self.gettz(tzname)
-
-            self.assertEqual(tz.datetime_ambiguous(dt, tz=tzi), ambiguous)
-
-    def testAmbiguousNegativeUTCOffset(self):
-        self._test_ambiguous_time(datetime(2015, 11, 1, 1, 30),
-                                  'America/New_York', True)
-
-    def testAmbiguousPositiveUTCOffset(self):
-        self._test_ambiguous_time(datetime(2012, 4, 1, 2, 30),
-                                  'Australia/Sydney', True)
-
-    def testUnambiguousNegativeUTCOffset(self):
-        self._test_ambiguous_time(datetime(2015, 11, 1, 2, 30),
-                                  'America/New_York', False)
-
-    def testUnambiguousPositiveUTCOffset(self):
-        self._test_ambiguous_time(datetime(2012, 4, 1, 3, 30),
-                                  'Australia/Sydney', False)
-
-    def testUnambiguousGapNegativeUTCOffset(self):
-        # Imaginary time
-        self._test_ambiguous_time(datetime(2011, 3, 13, 2, 30),
-                                  'America/New_York', False)
-
-    def testUnambiguousGapPositiveUTCOffset(self):
-        # Imaginary time
-        self._test_ambiguous_time(datetime(2012, 10, 7, 2, 30),
-                                  'Australia/Sydney', False)
-
-    def _test_imaginary_time(self, dt, tzid, exists):
-        tzname = self._get_tzname(tzid)
-        with self._gettz_context(tzname):
-            tzi = self.gettz(tzname)
-
-            self.assertEqual(tz.datetime_exists(dt, tz=tzi), exists)
-
-    def testImaginaryNegativeUTCOffset(self):
-        self._test_imaginary_time(datetime(2011, 3, 13, 2, 30),
-                                  'America/New_York', False)
-
-    def testNotImaginaryNegativeUTCOffset(self):
-        self._test_imaginary_time(datetime(2011, 3, 13, 1, 30),
-                                  'America/New_York', True)
-
-    def testImaginaryPositiveUTCOffset(self):
-        self._test_imaginary_time(datetime(2012, 10, 7, 2, 30),
-                                  'Australia/Sydney', False)
-
-    def testNotImaginaryPositiveUTCOffset(self):
-        self._test_imaginary_time(datetime(2012, 10, 7, 1, 30),
-                                  'Australia/Sydney', True)
-
-    def testNotImaginaryFoldNegativeUTCOffset(self):
-        self._test_imaginary_time(datetime(2015, 11, 1, 1, 30),
-                                  'America/New_York', True)
-
-    def testNotImaginaryFoldPositiveUTCOffset(self):
-        self._test_imaginary_time(datetime(2012, 4, 1, 3, 30),
-                                  'Australia/Sydney', True)
-
-    @unittest.skip("Known failure in Python 3.6.")
-    def testEqualAmbiguousComparison(self):
-        tzname = self._get_tzname('Australia/Sydney')
-
-        with self._gettz_context(tzname):
-            SYD0 = self.gettz(tzname)
-            SYD1 = self.gettz(tzname)
-
+ 
+            dt0 = datetime(2011, 11, 6, 1, 30, tzinfo=NYC) 
+            dt1 = tz.enfold(dt0, fold=1) 
+ 
+            # Make sure these actually represent different times 
+            self.assertNotEqual(dt0.astimezone(UTC), dt1.astimezone(UTC)) 
+ 
+            # Test that they compare equal 
+            self.assertEqual(dt0, dt1) 
+ 
+    def _test_ambiguous_time(self, dt, tzid, ambiguous): 
+        # This is a test to check that the individual is_ambiguous values 
+        # on the _tzinfo subclasses work. 
+        tzname = self._get_tzname(tzid) 
+ 
+        with self._gettz_context(tzname): 
+            tzi = self.gettz(tzname) 
+ 
+            self.assertEqual(tz.datetime_ambiguous(dt, tz=tzi), ambiguous) 
+ 
+    def testAmbiguousNegativeUTCOffset(self): 
+        self._test_ambiguous_time(datetime(2015, 11, 1, 1, 30), 
+                                  'America/New_York', True) 
+ 
+    def testAmbiguousPositiveUTCOffset(self): 
+        self._test_ambiguous_time(datetime(2012, 4, 1, 2, 30), 
+                                  'Australia/Sydney', True) 
+ 
+    def testUnambiguousNegativeUTCOffset(self): 
+        self._test_ambiguous_time(datetime(2015, 11, 1, 2, 30), 
+                                  'America/New_York', False) 
+ 
+    def testUnambiguousPositiveUTCOffset(self): 
+        self._test_ambiguous_time(datetime(2012, 4, 1, 3, 30), 
+                                  'Australia/Sydney', False) 
+ 
+    def testUnambiguousGapNegativeUTCOffset(self): 
+        # Imaginary time 
+        self._test_ambiguous_time(datetime(2011, 3, 13, 2, 30), 
+                                  'America/New_York', False) 
+ 
+    def testUnambiguousGapPositiveUTCOffset(self): 
+        # Imaginary time 
+        self._test_ambiguous_time(datetime(2012, 10, 7, 2, 30), 
+                                  'Australia/Sydney', False) 
+ 
+    def _test_imaginary_time(self, dt, tzid, exists): 
+        tzname = self._get_tzname(tzid) 
+        with self._gettz_context(tzname): 
+            tzi = self.gettz(tzname) 
+ 
+            self.assertEqual(tz.datetime_exists(dt, tz=tzi), exists) 
+ 
+    def testImaginaryNegativeUTCOffset(self): 
+        self._test_imaginary_time(datetime(2011, 3, 13, 2, 30), 
+                                  'America/New_York', False) 
+ 
+    def testNotImaginaryNegativeUTCOffset(self): 
+        self._test_imaginary_time(datetime(2011, 3, 13, 1, 30), 
+                                  'America/New_York', True) 
+ 
+    def testImaginaryPositiveUTCOffset(self): 
+        self._test_imaginary_time(datetime(2012, 10, 7, 2, 30), 
+                                  'Australia/Sydney', False) 
+ 
+    def testNotImaginaryPositiveUTCOffset(self): 
+        self._test_imaginary_time(datetime(2012, 10, 7, 1, 30), 
+                                  'Australia/Sydney', True) 
+ 
+    def testNotImaginaryFoldNegativeUTCOffset(self): 
+        self._test_imaginary_time(datetime(2015, 11, 1, 1, 30), 
+                                  'America/New_York', True) 
+ 
+    def testNotImaginaryFoldPositiveUTCOffset(self): 
+        self._test_imaginary_time(datetime(2012, 4, 1, 3, 30), 
+                                  'Australia/Sydney', True) 
+ 
+    @unittest.skip("Known failure in Python 3.6.") 
+    def testEqualAmbiguousComparison(self): 
+        tzname = self._get_tzname('Australia/Sydney') 
+ 
+        with self._gettz_context(tzname): 
+            SYD0 = self.gettz(tzname) 
+            SYD1 = self.gettz(tzname) 
+ 
             t0_u = datetime(2012, 3, 31, 14, 30, tzinfo=tz.UTC)  # AEST
-
-            t0_syd0 = t0_u.astimezone(SYD0)
-            t0_syd1 = t0_u.astimezone(SYD1)
-
-            # This is considered an "inter-zone comparison" because it's an
-            # ambiguous datetime.
-            self.assertEqual(t0_syd0, t0_syd1)
-
-
-class TzWinFoldMixin(object):
-    def get_args(self, tzname):
-        return (tzname, )
-
-    class context(object):
-        def __init__(*args, **kwargs):
-            pass
-
-        def __enter__(*args, **kwargs):
-            pass
-
-        def __exit__(*args, **kwargs):
-            pass
-
-    def get_utc_transitions(self, tzi, year, gap):
-        dston, dstoff = tzi.transitions(year)
-        if gap:
-            t_n = dston - timedelta(minutes=30)
-
+ 
+            t0_syd0 = t0_u.astimezone(SYD0) 
+            t0_syd1 = t0_u.astimezone(SYD1) 
+ 
+            # This is considered an "inter-zone comparison" because it's an 
+            # ambiguous datetime. 
+            self.assertEqual(t0_syd0, t0_syd1) 
+ 
+ 
+class TzWinFoldMixin(object): 
+    def get_args(self, tzname): 
+        return (tzname, ) 
+ 
+    class context(object): 
+        def __init__(*args, **kwargs): 
+            pass 
+ 
+        def __enter__(*args, **kwargs): 
+            pass 
+ 
+        def __exit__(*args, **kwargs): 
+            pass 
+ 
+    def get_utc_transitions(self, tzi, year, gap): 
+        dston, dstoff = tzi.transitions(year) 
+        if gap: 
+            t_n = dston - timedelta(minutes=30) 
+ 
             t0_u = t_n.replace(tzinfo=tzi).astimezone(tz.UTC)
-            t1_u = t0_u + timedelta(hours=1)
-        else:
-            # Get 1 hour before the first ambiguous date
-            t_n = dstoff - timedelta(minutes=30)
-
+            t1_u = t0_u + timedelta(hours=1) 
+        else: 
+            # Get 1 hour before the first ambiguous date 
+            t_n = dstoff - timedelta(minutes=30) 
+ 
             t0_u = t_n.replace(tzinfo=tzi).astimezone(tz.UTC)
-            t_n += timedelta(hours=1)                   # Naive ambiguous date
-            t0_u = t0_u + timedelta(hours=1)            # First ambiguous date
-            t1_u = t0_u + timedelta(hours=1)            # Second ambiguous date
-
-        return t_n, t0_u, t1_u
-
-    def testFoldPositiveUTCOffset(self):
-        # Test that we can resolve ambiguous times
-        tzname = 'AUS Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            # Calling fromutc() alters the tzfile object
-            SYD = self.tzclass(*args)
-
-            # Get the transition time in UTC from the object, because
-            # Windows doesn't store historical info
-            t_n, t0_u, t1_u = self.get_utc_transitions(SYD, 2012, False)
-
-            # Using fresh tzfiles
-            t0_syd = t0_u.astimezone(SYD)
-            t1_syd = t1_u.astimezone(SYD)
-
-            self.assertEqual(t0_syd.replace(tzinfo=None), t_n)
-
-            self.assertEqual(t1_syd.replace(tzinfo=None), t_n)
-
-            self.assertEqual(t0_syd.utcoffset(), timedelta(hours=11))
-            self.assertEqual(t1_syd.utcoffset(), timedelta(hours=10))
-            self.assertNotEqual(t0_syd.tzname(), t1_syd.tzname())
-
-    def testGapPositiveUTCOffset(self):
-        # Test that we don't have a problem around gaps.
-        tzname = 'AUS Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            SYD = self.tzclass(*args)
-
-            t_n, t0_u, t1_u = self.get_utc_transitions(SYD, 2012, True)
-
-            t0 = t0_u.astimezone(SYD)
-            t1 = t1_u.astimezone(SYD)
-
-            self.assertEqual(t0.replace(tzinfo=None), t_n)
-
-            self.assertEqual(t1.replace(tzinfo=None), t_n + timedelta(hours=2))
-
-            self.assertEqual(t0.utcoffset(), timedelta(hours=10))
-            self.assertEqual(t1.utcoffset(), timedelta(hours=11))
-
-    def testFoldNegativeUTCOffset(self):
-        # Test that we can resolve ambiguous times
-        tzname = 'Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            TOR = self.tzclass(*args)
-
-            t_n, t0_u, t1_u = self.get_utc_transitions(TOR, 2011, False)
-
-            t0_tor = t0_u.astimezone(TOR)
-            t1_tor = t1_u.astimezone(TOR)
-
-            self.assertEqual(t0_tor.replace(tzinfo=None), t_n)
-            self.assertEqual(t1_tor.replace(tzinfo=None), t_n)
-
-            self.assertNotEqual(t0_tor.tzname(), t1_tor.tzname())
-            self.assertEqual(t0_tor.utcoffset(), timedelta(hours=-4.0))
-            self.assertEqual(t1_tor.utcoffset(), timedelta(hours=-5.0))
-
-    def testGapNegativeUTCOffset(self):
-        # Test that we don't have a problem around gaps.
-        tzname = 'Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            TOR = self.tzclass(*args)
-
-            t_n, t0_u, t1_u = self.get_utc_transitions(TOR, 2011, True)
-
-            t0 = t0_u.astimezone(TOR)
-            t1 = t1_u.astimezone(TOR)
-
-            self.assertEqual(t0.replace(tzinfo=None),
-                             t_n)
-
-            self.assertEqual(t1.replace(tzinfo=None),
-                             t_n + timedelta(hours=2))
-
-            self.assertNotEqual(t0.tzname(), t1.tzname())
-            self.assertEqual(t0.utcoffset(), timedelta(hours=-5.0))
-            self.assertEqual(t1.utcoffset(), timedelta(hours=-4.0))
-
-    def testFoldIndependence(self):
-        tzname = 'Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            NYC = self.tzclass(*args)
+            t_n += timedelta(hours=1)                   # Naive ambiguous date 
+            t0_u = t0_u + timedelta(hours=1)            # First ambiguous date 
+            t1_u = t0_u + timedelta(hours=1)            # Second ambiguous date 
+ 
+        return t_n, t0_u, t1_u 
+ 
+    def testFoldPositiveUTCOffset(self): 
+        # Test that we can resolve ambiguous times 
+        tzname = 'AUS Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            # Calling fromutc() alters the tzfile object 
+            SYD = self.tzclass(*args) 
+ 
+            # Get the transition time in UTC from the object, because 
+            # Windows doesn't store historical info 
+            t_n, t0_u, t1_u = self.get_utc_transitions(SYD, 2012, False) 
+ 
+            # Using fresh tzfiles 
+            t0_syd = t0_u.astimezone(SYD) 
+            t1_syd = t1_u.astimezone(SYD) 
+ 
+            self.assertEqual(t0_syd.replace(tzinfo=None), t_n) 
+ 
+            self.assertEqual(t1_syd.replace(tzinfo=None), t_n) 
+ 
+            self.assertEqual(t0_syd.utcoffset(), timedelta(hours=11)) 
+            self.assertEqual(t1_syd.utcoffset(), timedelta(hours=10)) 
+            self.assertNotEqual(t0_syd.tzname(), t1_syd.tzname()) 
+ 
+    def testGapPositiveUTCOffset(self): 
+        # Test that we don't have a problem around gaps. 
+        tzname = 'AUS Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            SYD = self.tzclass(*args) 
+ 
+            t_n, t0_u, t1_u = self.get_utc_transitions(SYD, 2012, True) 
+ 
+            t0 = t0_u.astimezone(SYD) 
+            t1 = t1_u.astimezone(SYD) 
+ 
+            self.assertEqual(t0.replace(tzinfo=None), t_n) 
+ 
+            self.assertEqual(t1.replace(tzinfo=None), t_n + timedelta(hours=2)) 
+ 
+            self.assertEqual(t0.utcoffset(), timedelta(hours=10)) 
+            self.assertEqual(t1.utcoffset(), timedelta(hours=11)) 
+ 
+    def testFoldNegativeUTCOffset(self): 
+        # Test that we can resolve ambiguous times 
+        tzname = 'Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            TOR = self.tzclass(*args) 
+ 
+            t_n, t0_u, t1_u = self.get_utc_transitions(TOR, 2011, False) 
+ 
+            t0_tor = t0_u.astimezone(TOR) 
+            t1_tor = t1_u.astimezone(TOR) 
+ 
+            self.assertEqual(t0_tor.replace(tzinfo=None), t_n) 
+            self.assertEqual(t1_tor.replace(tzinfo=None), t_n) 
+ 
+            self.assertNotEqual(t0_tor.tzname(), t1_tor.tzname()) 
+            self.assertEqual(t0_tor.utcoffset(), timedelta(hours=-4.0)) 
+            self.assertEqual(t1_tor.utcoffset(), timedelta(hours=-5.0)) 
+ 
+    def testGapNegativeUTCOffset(self): 
+        # Test that we don't have a problem around gaps. 
+        tzname = 'Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            TOR = self.tzclass(*args) 
+ 
+            t_n, t0_u, t1_u = self.get_utc_transitions(TOR, 2011, True) 
+ 
+            t0 = t0_u.astimezone(TOR) 
+            t1 = t1_u.astimezone(TOR) 
+ 
+            self.assertEqual(t0.replace(tzinfo=None), 
+                             t_n) 
+ 
+            self.assertEqual(t1.replace(tzinfo=None), 
+                             t_n + timedelta(hours=2)) 
+ 
+            self.assertNotEqual(t0.tzname(), t1.tzname()) 
+            self.assertEqual(t0.utcoffset(), timedelta(hours=-5.0)) 
+            self.assertEqual(t1.utcoffset(), timedelta(hours=-4.0)) 
+ 
+    def testFoldIndependence(self): 
+        tzname = 'Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            NYC = self.tzclass(*args) 
             UTC = tz.UTC
-            hour = timedelta(hours=1)
-
-            # Firmly 2015-11-01 0:30 EDT-4
-            t_n, t0_u, t1_u = self.get_utc_transitions(NYC, 2015, False)
-
-            pre_dst = (t_n - hour).replace(tzinfo=NYC)
-
-            # Currently, there's no way around the fact that this resolves to an
-            # ambiguous date, which defaults to EST. I'm not hard-coding in the
-            # answer, though, because the preferred behavior would be that this
-            # results in a time on the EDT side.
-
-            # Ambiguous between 2015-11-01 1:30 EDT-4 and 2015-11-01 1:30 EST-5
-            in_dst = pre_dst + hour
-            in_dst_tzname_0 = in_dst.tzname()     # Stash the tzname - EDT
-
-            # Doing the arithmetic in UTC creates a date that is unambiguously
-            # 2015-11-01 1:30 EDT-5
-            in_dst_via_utc = (pre_dst.astimezone(UTC) + 2*hour).astimezone(NYC)
-
-            # Make sure we got the right folding behavior
-            self.assertNotEqual(in_dst_via_utc.tzname(), in_dst_tzname_0)
-
-            # Now check to make sure in_dst's tzname hasn't changed
-            self.assertEqual(in_dst_tzname_0, in_dst.tzname())
-
-    def testInZoneFoldEquality(self):
-        # Two datetimes in the same zone are considered to be equal if their
-        # wall times are equal, even if they have different absolute times.
-        tzname = 'Eastern Standard Time'
-        args = self.get_args(tzname)
-
-        with self.context(tzname):
-            NYC = self.tzclass(*args)
+            hour = timedelta(hours=1) 
+ 
+            # Firmly 2015-11-01 0:30 EDT-4 
+            t_n, t0_u, t1_u = self.get_utc_transitions(NYC, 2015, False) 
+ 
+            pre_dst = (t_n - hour).replace(tzinfo=NYC) 
+ 
+            # Currently, there's no way around the fact that this resolves to an 
+            # ambiguous date, which defaults to EST. I'm not hard-coding in the 
+            # answer, though, because the preferred behavior would be that this 
+            # results in a time on the EDT side. 
+ 
+            # Ambiguous between 2015-11-01 1:30 EDT-4 and 2015-11-01 1:30 EST-5 
+            in_dst = pre_dst + hour 
+            in_dst_tzname_0 = in_dst.tzname()     # Stash the tzname - EDT 
+ 
+            # Doing the arithmetic in UTC creates a date that is unambiguously 
+            # 2015-11-01 1:30 EDT-5 
+            in_dst_via_utc = (pre_dst.astimezone(UTC) + 2*hour).astimezone(NYC) 
+ 
+            # Make sure we got the right folding behavior 
+            self.assertNotEqual(in_dst_via_utc.tzname(), in_dst_tzname_0) 
+ 
+            # Now check to make sure in_dst's tzname hasn't changed 
+            self.assertEqual(in_dst_tzname_0, in_dst.tzname()) 
+ 
+    def testInZoneFoldEquality(self): 
+        # Two datetimes in the same zone are considered to be equal if their 
+        # wall times are equal, even if they have different absolute times. 
+        tzname = 'Eastern Standard Time' 
+        args = self.get_args(tzname) 
+ 
+        with self.context(tzname): 
+            NYC = self.tzclass(*args) 
             UTC = tz.UTC
-
-            t_n, t0_u, t1_u = self.get_utc_transitions(NYC, 2011, False)
-
-            dt0 = t_n.replace(tzinfo=NYC)
-            dt1 = tz.enfold(dt0, fold=1)
-
-            # Make sure these actually represent different times
-            self.assertNotEqual(dt0.astimezone(UTC), dt1.astimezone(UTC))
-
-            # Test that they compare equal
-            self.assertEqual(dt0, dt1)
-
-###
-# Test Cases
-class TzUTCTest(unittest.TestCase):
-    def testSingleton(self):
-        UTC_0 = tz.tzutc()
-        UTC_1 = tz.tzutc()
-
-        self.assertIs(UTC_0, UTC_1)
-
-    def testOffset(self):
-        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc())
-
-        self.assertEqual(ct.utcoffset(), timedelta(seconds=0))
-
-    def testDst(self):
-        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc())
-
-        self.assertEqual(ct.dst(), timedelta(seconds=0))
-
-    def testTzName(self):
-        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc())
-        self.assertEqual(ct.tzname(), 'UTC')
-
-    def testEquality(self):
-        UTC0 = tz.tzutc()
-        UTC1 = tz.tzutc()
-
-        self.assertEqual(UTC0, UTC1)
-
-    def testInequality(self):
-        UTC = tz.tzutc()
-        UTCp4 = tz.tzoffset('UTC+4', 14400)
-
-        self.assertNotEqual(UTC, UTCp4)
-
-    def testInequalityInteger(self):
-        self.assertFalse(tz.tzutc() == 7)
-        self.assertNotEqual(tz.tzutc(), 7)
-
-    def testInequalityUnsupported(self):
-        self.assertEqual(tz.tzutc(), ComparesEqual)
-
-    def testRepr(self):
-        UTC = tz.tzutc()
-        self.assertEqual(repr(UTC), 'tzutc()')
-
-    def testTimeOnlyUTC(self):
-        # https://github.com/dateutil/dateutil/issues/132
-        # tzutc doesn't care
-        tz_utc = tz.tzutc()
-        self.assertEqual(dt_time(13, 20, tzinfo=tz_utc).utcoffset(),
-                         timedelta(0))
-
-    def testAmbiguity(self):
-        # Pick an arbitrary datetime, this should always return False.
-        dt = datetime(2011, 9, 1, 2, 30, tzinfo=tz.tzutc())
-
-        self.assertFalse(tz.datetime_ambiguous(dt))
-
-
-@pytest.mark.tzoffset
-class TzOffsetTest(unittest.TestCase):
-    def testTimedeltaOffset(self):
-        est = tz.tzoffset('EST', timedelta(hours=-5))
-        est_s = tz.tzoffset('EST', -18000)
-
-        self.assertEqual(est, est_s)
-
-    def testTzNameNone(self):
-        gmt5 = tz.tzoffset(None, -18000)       # -5:00
-        self.assertIs(datetime(2003, 10, 26, 0, 0, tzinfo=gmt5).tzname(),
-                      None)
-
-    def testTimeOnlyOffset(self):
-        # tzoffset doesn't care
-        tz_offset = tz.tzoffset('+3', 3600)
-        self.assertEqual(dt_time(13, 20, tzinfo=tz_offset).utcoffset(),
-                         timedelta(seconds=3600))
-
-    def testTzOffsetRepr(self):
-        tname = 'EST'
-        tzo = tz.tzoffset(tname, -5 * 3600)
-        self.assertEqual(repr(tzo), "tzoffset(" + repr(tname) + ", -18000)")
-
-    def testEquality(self):
-        utc = tz.tzoffset('UTC', 0)
-        gmt = tz.tzoffset('GMT', 0)
-
-        self.assertEqual(utc, gmt)
-
-    def testUTCEquality(self):
+ 
+            t_n, t0_u, t1_u = self.get_utc_transitions(NYC, 2011, False) 
+ 
+            dt0 = t_n.replace(tzinfo=NYC) 
+            dt1 = tz.enfold(dt0, fold=1) 
+ 
+            # Make sure these actually represent different times 
+            self.assertNotEqual(dt0.astimezone(UTC), dt1.astimezone(UTC)) 
+ 
+            # Test that they compare equal 
+            self.assertEqual(dt0, dt1) 
+ 
+### 
+# Test Cases 
+class TzUTCTest(unittest.TestCase): 
+    def testSingleton(self): 
+        UTC_0 = tz.tzutc() 
+        UTC_1 = tz.tzutc() 
+ 
+        self.assertIs(UTC_0, UTC_1) 
+ 
+    def testOffset(self): 
+        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc()) 
+ 
+        self.assertEqual(ct.utcoffset(), timedelta(seconds=0)) 
+ 
+    def testDst(self): 
+        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc()) 
+ 
+        self.assertEqual(ct.dst(), timedelta(seconds=0)) 
+ 
+    def testTzName(self): 
+        ct = datetime(2009, 4, 1, 12, 11, 13, tzinfo=tz.tzutc()) 
+        self.assertEqual(ct.tzname(), 'UTC') 
+ 
+    def testEquality(self): 
+        UTC0 = tz.tzutc() 
+        UTC1 = tz.tzutc() 
+ 
+        self.assertEqual(UTC0, UTC1) 
+ 
+    def testInequality(self): 
+        UTC = tz.tzutc() 
+        UTCp4 = tz.tzoffset('UTC+4', 14400) 
+ 
+        self.assertNotEqual(UTC, UTCp4) 
+ 
+    def testInequalityInteger(self): 
+        self.assertFalse(tz.tzutc() == 7) 
+        self.assertNotEqual(tz.tzutc(), 7) 
+ 
+    def testInequalityUnsupported(self): 
+        self.assertEqual(tz.tzutc(), ComparesEqual) 
+ 
+    def testRepr(self): 
+        UTC = tz.tzutc() 
+        self.assertEqual(repr(UTC), 'tzutc()') 
+ 
+    def testTimeOnlyUTC(self): 
+        # https://github.com/dateutil/dateutil/issues/132 
+        # tzutc doesn't care 
+        tz_utc = tz.tzutc() 
+        self.assertEqual(dt_time(13, 20, tzinfo=tz_utc).utcoffset(), 
+                         timedelta(0)) 
+ 
+    def testAmbiguity(self): 
+        # Pick an arbitrary datetime, this should always return False. 
+        dt = datetime(2011, 9, 1, 2, 30, tzinfo=tz.tzutc()) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(dt)) 
+ 
+ 
+@pytest.mark.tzoffset 
+class TzOffsetTest(unittest.TestCase): 
+    def testTimedeltaOffset(self): 
+        est = tz.tzoffset('EST', timedelta(hours=-5)) 
+        est_s = tz.tzoffset('EST', -18000) 
+ 
+        self.assertEqual(est, est_s) 
+ 
+    def testTzNameNone(self): 
+        gmt5 = tz.tzoffset(None, -18000)       # -5:00 
+        self.assertIs(datetime(2003, 10, 26, 0, 0, tzinfo=gmt5).tzname(), 
+                      None) 
+ 
+    def testTimeOnlyOffset(self): 
+        # tzoffset doesn't care 
+        tz_offset = tz.tzoffset('+3', 3600) 
+        self.assertEqual(dt_time(13, 20, tzinfo=tz_offset).utcoffset(), 
+                         timedelta(seconds=3600)) 
+ 
+    def testTzOffsetRepr(self): 
+        tname = 'EST' 
+        tzo = tz.tzoffset(tname, -5 * 3600) 
+        self.assertEqual(repr(tzo), "tzoffset(" + repr(tname) + ", -18000)") 
+ 
+    def testEquality(self): 
+        utc = tz.tzoffset('UTC', 0) 
+        gmt = tz.tzoffset('GMT', 0) 
+ 
+        self.assertEqual(utc, gmt) 
+ 
+    def testUTCEquality(self): 
         utc = tz.UTC
-        o_utc = tz.tzoffset('UTC', 0)
-
-        self.assertEqual(utc, o_utc)
-        self.assertEqual(o_utc, utc)
-
-    def testInequalityInvalid(self):
-        tzo = tz.tzoffset('-3', -3 * 3600)
-        self.assertFalse(tzo == -3)
-        self.assertNotEqual(tzo, -3)
-
-    def testInequalityUnsupported(self):
-        tzo = tz.tzoffset('-5', -5 * 3600)
-
-        self.assertTrue(tzo == ComparesEqual)
-        self.assertFalse(tzo != ComparesEqual)
-        self.assertEqual(tzo, ComparesEqual)
-
-    def testAmbiguity(self):
-        # Pick an arbitrary datetime, this should always return False.
-        dt = datetime(2011, 9, 1, 2, 30, tzinfo=tz.tzoffset("EST", -5 * 3600))
-
-        self.assertFalse(tz.datetime_ambiguous(dt))
-
-    def testTzOffsetInstance(self):
-        tz1 = tz.tzoffset.instance('EST', timedelta(hours=-5))
-        tz2 = tz.tzoffset.instance('EST', timedelta(hours=-5))
-
-        assert tz1 is not tz2
-
-    def testTzOffsetSingletonDifferent(self):
-        tz1 = tz.tzoffset('EST', timedelta(hours=-5))
-        tz2 = tz.tzoffset('EST', -18000)
-
-        assert tz1 is tz2
-
+        o_utc = tz.tzoffset('UTC', 0) 
+ 
+        self.assertEqual(utc, o_utc) 
+        self.assertEqual(o_utc, utc) 
+ 
+    def testInequalityInvalid(self): 
+        tzo = tz.tzoffset('-3', -3 * 3600) 
+        self.assertFalse(tzo == -3) 
+        self.assertNotEqual(tzo, -3) 
+ 
+    def testInequalityUnsupported(self): 
+        tzo = tz.tzoffset('-5', -5 * 3600) 
+ 
+        self.assertTrue(tzo == ComparesEqual) 
+        self.assertFalse(tzo != ComparesEqual) 
+        self.assertEqual(tzo, ComparesEqual) 
+ 
+    def testAmbiguity(self): 
+        # Pick an arbitrary datetime, this should always return False. 
+        dt = datetime(2011, 9, 1, 2, 30, tzinfo=tz.tzoffset("EST", -5 * 3600)) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(dt)) 
+ 
+    def testTzOffsetInstance(self): 
+        tz1 = tz.tzoffset.instance('EST', timedelta(hours=-5)) 
+        tz2 = tz.tzoffset.instance('EST', timedelta(hours=-5)) 
+ 
+        assert tz1 is not tz2 
+ 
+    def testTzOffsetSingletonDifferent(self): 
+        tz1 = tz.tzoffset('EST', timedelta(hours=-5)) 
+        tz2 = tz.tzoffset('EST', -18000) 
+ 
+        assert tz1 is tz2 
+ 
 
 @pytest.mark.smoke
-@pytest.mark.tzoffset
+@pytest.mark.tzoffset 
 def test_tzoffset_weakref():
     UTC1 = tz.tzoffset('UTC', 0)
     UTC_ref = weakref.ref(tz.tzoffset('UTC', 0))
@@ -758,18 +758,18 @@ def test_tzoffset_weakref():
 
 
 @pytest.mark.tzoffset
-@pytest.mark.parametrize('args', [
-    ('UTC', 0),
-    ('EST', -18000),
-    ('EST', timedelta(hours=-5)),
-    (None, timedelta(hours=3)),
-])
-def test_tzoffset_singleton(args):
-    tz1 = tz.tzoffset(*args)
-    tz2 = tz.tzoffset(*args)
-
-    assert tz1 is tz2
-
+@pytest.mark.parametrize('args', [ 
+    ('UTC', 0), 
+    ('EST', -18000), 
+    ('EST', timedelta(hours=-5)), 
+    (None, timedelta(hours=3)), 
+]) 
+def test_tzoffset_singleton(args): 
+    tz1 = tz.tzoffset(*args) 
+    tz2 = tz.tzoffset(*args) 
+ 
+    assert tz1 is tz2 
+ 
 
 @pytest.mark.tzoffset
 @pytest.mark.skipif(not SUPPORTS_SUB_MINUTE_OFFSETS,
@@ -789,297 +789,297 @@ def test_tzoffset_sub_minute_rounding():
     assert test_date.utcoffset() == timedelta(hours=12, minutes=1)
 
 
-@pytest.mark.tzlocal
-class TzLocalTest(unittest.TestCase):
-    def testEquality(self):
-        tz1 = tz.tzlocal()
-        tz2 = tz.tzlocal()
-
-        # Explicitly calling == and != here to ensure the operators work
-        self.assertTrue(tz1 == tz2)
-        self.assertFalse(tz1 != tz2)
-
-    def testInequalityFixedOffset(self):
-        tzl = tz.tzlocal()
-        tzos = tz.tzoffset('LST', tzl._std_offset.total_seconds())
-        tzod = tz.tzoffset('LDT', tzl._std_offset.total_seconds())
-
-        self.assertFalse(tzl == tzos)
-        self.assertFalse(tzl == tzod)
-        self.assertTrue(tzl != tzos)
-        self.assertTrue(tzl != tzod)
-
-    def testInequalityInvalid(self):
-        tzl = tz.tzlocal()
-
-        self.assertTrue(tzl != 1)
-        self.assertFalse(tzl == 1)
-
-        # TODO: Use some sort of universal local mocking so that it's clear
-        # that we're expecting tzlocal to *not* be Pacific/Kiritimati
-        LINT = tz.gettz('Pacific/Kiritimati')
-        self.assertTrue(tzl != LINT)
-        self.assertFalse(tzl == LINT)
-
-    def testInequalityUnsupported(self):
-        tzl = tz.tzlocal()
-
-        self.assertTrue(tzl == ComparesEqual)
-        self.assertFalse(tzl != ComparesEqual)
-
-    def testRepr(self):
-        tzl = tz.tzlocal()
-
-        self.assertEqual(repr(tzl), 'tzlocal()')
-
-
-@pytest.mark.parametrize('args,kwargs', [
-    (('EST', -18000), {}),
-    (('EST', timedelta(hours=-5)), {}),
-    (('EST',), {'offset': -18000}),
-    (('EST',), {'offset': timedelta(hours=-5)}),
-    (tuple(), {'name': 'EST', 'offset': -18000})
-])
-def test_tzoffset_is(args, kwargs):
-    tz_ref = tz.tzoffset('EST', -18000)
-    assert tz.tzoffset(*args, **kwargs) is tz_ref
-
-
-def test_tzoffset_is_not():
-    assert tz.tzoffset('EDT', -14400) is not tz.tzoffset('EST', -18000)
-
-
-@pytest.mark.tzlocal
-@unittest.skipIf(IS_WIN, "requires Unix")
-class TzLocalNixTest(unittest.TestCase, TzFoldMixin):
-    # This is a set of tests for `tzlocal()` on *nix systems
-
-    # POSIX string indicating change to summer time on the 2nd Sunday in March
-    # at 2AM, and ending the 1st Sunday in November at 2AM. (valid >= 2007)
-    TZ_EST = 'EST+5EDT,M3.2.0/2,M11.1.0/2'
-
-    # POSIX string for AEST/AEDT (valid >= 2008)
-    TZ_AEST = 'AEST-10AEDT,M10.1.0/2,M4.1.0/3'
-
-    # POSIX string for BST/GMT
-    TZ_LON = 'GMT0BST,M3.5.0,M10.5.0'
-
-    # POSIX string for UTC
-    UTC = 'UTC'
-
-    def gettz(self, tzname):
-        # Actual time zone changes are handled by the _gettz_context function
-        return tz.tzlocal()
-
-    def _gettz_context(self, tzname):
-        tzname_map = {'Australia/Sydney': self.TZ_AEST,
-                      'America/Toronto': self.TZ_EST,
-                      'America/New_York': self.TZ_EST,
-                      'Europe/London': self.TZ_LON}
-
-        return TZEnvContext(tzname_map.get(tzname, tzname))
-
-    def _testTzFunc(self, tzval, func, std_val, dst_val):
-        """
-        This generates tests about how the behavior of a function ``func``
-        changes between STD and DST (e.g. utcoffset, tzname, dst).
-
-        It assume that DST starts the 2nd Sunday in March and ends the 1st
-        Sunday in November
-        """
-        with TZEnvContext(tzval):
-            dt1 = datetime(2015, 2, 1, 12, 0, tzinfo=tz.tzlocal())  # STD
-            dt2 = datetime(2015, 5, 1, 12, 0, tzinfo=tz.tzlocal())  # DST
-
-            self.assertEqual(func(dt1), std_val)
-            self.assertEqual(func(dt2), dst_val)
-
-    def _testTzName(self, tzval, std_name, dst_name):
-        func = datetime.tzname
-
-        self._testTzFunc(tzval, func, std_name, dst_name)
-
-    def testTzNameDST(self):
-        # Test tzname in a zone with DST
-        self._testTzName(self.TZ_EST, 'EST', 'EDT')
-
-    def testTzNameUTC(self):
-        # Test tzname in a zone without DST
-        self._testTzName(self.UTC, 'UTC', 'UTC')
-
-    def _testOffset(self, tzval, std_off, dst_off):
-        func = datetime.utcoffset
-
-        self._testTzFunc(tzval, func, std_off, dst_off)
-
-    def testOffsetDST(self):
-        self._testOffset(self.TZ_EST, timedelta(hours=-5), timedelta(hours=-4))
-
-    def testOffsetUTC(self):
-        self._testOffset(self.UTC, timedelta(0), timedelta(0))
-
-    def _testDST(self, tzval, dst_dst):
-        func = datetime.dst
-        std_dst = timedelta(0)
-
-        self._testTzFunc(tzval, func, std_dst, dst_dst)
-
-    def testDSTDST(self):
-        self._testDST(self.TZ_EST, timedelta(hours=1))
-
-    def testDSTUTC(self):
-        self._testDST(self.UTC, timedelta(0))
-
-    def testTimeOnlyOffsetLocalUTC(self):
-        with TZEnvContext(self.UTC):
-            self.assertEqual(dt_time(13, 20, tzinfo=tz.tzlocal()).utcoffset(),
-                             timedelta(0))
-
-    def testTimeOnlyOffsetLocalDST(self):
-        with TZEnvContext(self.TZ_EST):
-            self.assertIs(dt_time(13, 20, tzinfo=tz.tzlocal()).utcoffset(),
-                          None)
-
-    def testTimeOnlyDSTLocalUTC(self):
-        with TZEnvContext(self.UTC):
-            self.assertEqual(dt_time(13, 20, tzinfo=tz.tzlocal()).dst(),
-                             timedelta(0))
-
-    def testTimeOnlyDSTLocalDST(self):
-        with TZEnvContext(self.TZ_EST):
-            self.assertIs(dt_time(13, 20, tzinfo=tz.tzlocal()).dst(),
-                          None)
-
-    def testUTCEquality(self):
-        with TZEnvContext(self.UTC):
+@pytest.mark.tzlocal 
+class TzLocalTest(unittest.TestCase): 
+    def testEquality(self): 
+        tz1 = tz.tzlocal() 
+        tz2 = tz.tzlocal() 
+ 
+        # Explicitly calling == and != here to ensure the operators work 
+        self.assertTrue(tz1 == tz2) 
+        self.assertFalse(tz1 != tz2) 
+ 
+    def testInequalityFixedOffset(self): 
+        tzl = tz.tzlocal() 
+        tzos = tz.tzoffset('LST', tzl._std_offset.total_seconds()) 
+        tzod = tz.tzoffset('LDT', tzl._std_offset.total_seconds()) 
+ 
+        self.assertFalse(tzl == tzos) 
+        self.assertFalse(tzl == tzod) 
+        self.assertTrue(tzl != tzos) 
+        self.assertTrue(tzl != tzod) 
+ 
+    def testInequalityInvalid(self): 
+        tzl = tz.tzlocal() 
+ 
+        self.assertTrue(tzl != 1) 
+        self.assertFalse(tzl == 1) 
+ 
+        # TODO: Use some sort of universal local mocking so that it's clear 
+        # that we're expecting tzlocal to *not* be Pacific/Kiritimati 
+        LINT = tz.gettz('Pacific/Kiritimati') 
+        self.assertTrue(tzl != LINT) 
+        self.assertFalse(tzl == LINT) 
+ 
+    def testInequalityUnsupported(self): 
+        tzl = tz.tzlocal() 
+ 
+        self.assertTrue(tzl == ComparesEqual) 
+        self.assertFalse(tzl != ComparesEqual) 
+ 
+    def testRepr(self): 
+        tzl = tz.tzlocal() 
+ 
+        self.assertEqual(repr(tzl), 'tzlocal()') 
+ 
+ 
+@pytest.mark.parametrize('args,kwargs', [ 
+    (('EST', -18000), {}), 
+    (('EST', timedelta(hours=-5)), {}), 
+    (('EST',), {'offset': -18000}), 
+    (('EST',), {'offset': timedelta(hours=-5)}), 
+    (tuple(), {'name': 'EST', 'offset': -18000}) 
+]) 
+def test_tzoffset_is(args, kwargs): 
+    tz_ref = tz.tzoffset('EST', -18000) 
+    assert tz.tzoffset(*args, **kwargs) is tz_ref 
+ 
+ 
+def test_tzoffset_is_not(): 
+    assert tz.tzoffset('EDT', -14400) is not tz.tzoffset('EST', -18000) 
+ 
+ 
+@pytest.mark.tzlocal 
+@unittest.skipIf(IS_WIN, "requires Unix") 
+class TzLocalNixTest(unittest.TestCase, TzFoldMixin): 
+    # This is a set of tests for `tzlocal()` on *nix systems 
+ 
+    # POSIX string indicating change to summer time on the 2nd Sunday in March 
+    # at 2AM, and ending the 1st Sunday in November at 2AM. (valid >= 2007) 
+    TZ_EST = 'EST+5EDT,M3.2.0/2,M11.1.0/2' 
+ 
+    # POSIX string for AEST/AEDT (valid >= 2008) 
+    TZ_AEST = 'AEST-10AEDT,M10.1.0/2,M4.1.0/3' 
+ 
+    # POSIX string for BST/GMT 
+    TZ_LON = 'GMT0BST,M3.5.0,M10.5.0' 
+ 
+    # POSIX string for UTC 
+    UTC = 'UTC' 
+ 
+    def gettz(self, tzname): 
+        # Actual time zone changes are handled by the _gettz_context function 
+        return tz.tzlocal() 
+ 
+    def _gettz_context(self, tzname): 
+        tzname_map = {'Australia/Sydney': self.TZ_AEST, 
+                      'America/Toronto': self.TZ_EST, 
+                      'America/New_York': self.TZ_EST, 
+                      'Europe/London': self.TZ_LON} 
+ 
+        return TZEnvContext(tzname_map.get(tzname, tzname)) 
+ 
+    def _testTzFunc(self, tzval, func, std_val, dst_val): 
+        """ 
+        This generates tests about how the behavior of a function ``func`` 
+        changes between STD and DST (e.g. utcoffset, tzname, dst). 
+ 
+        It assume that DST starts the 2nd Sunday in March and ends the 1st 
+        Sunday in November 
+        """ 
+        with TZEnvContext(tzval): 
+            dt1 = datetime(2015, 2, 1, 12, 0, tzinfo=tz.tzlocal())  # STD 
+            dt2 = datetime(2015, 5, 1, 12, 0, tzinfo=tz.tzlocal())  # DST 
+ 
+            self.assertEqual(func(dt1), std_val) 
+            self.assertEqual(func(dt2), dst_val) 
+ 
+    def _testTzName(self, tzval, std_name, dst_name): 
+        func = datetime.tzname 
+ 
+        self._testTzFunc(tzval, func, std_name, dst_name) 
+ 
+    def testTzNameDST(self): 
+        # Test tzname in a zone with DST 
+        self._testTzName(self.TZ_EST, 'EST', 'EDT') 
+ 
+    def testTzNameUTC(self): 
+        # Test tzname in a zone without DST 
+        self._testTzName(self.UTC, 'UTC', 'UTC') 
+ 
+    def _testOffset(self, tzval, std_off, dst_off): 
+        func = datetime.utcoffset 
+ 
+        self._testTzFunc(tzval, func, std_off, dst_off) 
+ 
+    def testOffsetDST(self): 
+        self._testOffset(self.TZ_EST, timedelta(hours=-5), timedelta(hours=-4)) 
+ 
+    def testOffsetUTC(self): 
+        self._testOffset(self.UTC, timedelta(0), timedelta(0)) 
+ 
+    def _testDST(self, tzval, dst_dst): 
+        func = datetime.dst 
+        std_dst = timedelta(0) 
+ 
+        self._testTzFunc(tzval, func, std_dst, dst_dst) 
+ 
+    def testDSTDST(self): 
+        self._testDST(self.TZ_EST, timedelta(hours=1)) 
+ 
+    def testDSTUTC(self): 
+        self._testDST(self.UTC, timedelta(0)) 
+ 
+    def testTimeOnlyOffsetLocalUTC(self): 
+        with TZEnvContext(self.UTC): 
+            self.assertEqual(dt_time(13, 20, tzinfo=tz.tzlocal()).utcoffset(), 
+                             timedelta(0)) 
+ 
+    def testTimeOnlyOffsetLocalDST(self): 
+        with TZEnvContext(self.TZ_EST): 
+            self.assertIs(dt_time(13, 20, tzinfo=tz.tzlocal()).utcoffset(), 
+                          None) 
+ 
+    def testTimeOnlyDSTLocalUTC(self): 
+        with TZEnvContext(self.UTC): 
+            self.assertEqual(dt_time(13, 20, tzinfo=tz.tzlocal()).dst(), 
+                             timedelta(0)) 
+ 
+    def testTimeOnlyDSTLocalDST(self): 
+        with TZEnvContext(self.TZ_EST): 
+            self.assertIs(dt_time(13, 20, tzinfo=tz.tzlocal()).dst(), 
+                          None) 
+ 
+    def testUTCEquality(self): 
+        with TZEnvContext(self.UTC): 
             assert tz.tzlocal() == tz.UTC
-
-
-# TODO: Maybe a better hack than this?
-def mark_tzlocal_nix(f):
-    marks = [
-        pytest.mark.tzlocal,
-        pytest.mark.skipif(IS_WIN, reason='requires Unix'),
-    ]
-
-    for mark in reversed(marks):
-        f = mark(f)
-
-    return f
-
-
-@mark_tzlocal_nix
-@pytest.mark.parametrize('tzvar', ['UTC', 'GMT0', 'UTC0'])
-def test_tzlocal_utc_equal(tzvar):
-    with TZEnvContext(tzvar):
-        assert tz.tzlocal() == tz.UTC
-
-
-@mark_tzlocal_nix
-@pytest.mark.parametrize('tzvar', [
-    'Europe/London', 'America/New_York',
-    'GMT0BST', 'EST5EDT'])
-def test_tzlocal_utc_unequal(tzvar):
-    with TZEnvContext(tzvar):
-        assert tz.tzlocal() != tz.UTC
-
-
-@mark_tzlocal_nix
-def test_tzlocal_local_time_trim_colon():
-    with TZEnvContext(':/etc/localtime'):
-        assert tz.gettz() is not None
-
-
-@mark_tzlocal_nix
-@pytest.mark.parametrize('tzvar, tzoff', [
-    ('EST5', tz.tzoffset('EST', -18000)),
+ 
+ 
+# TODO: Maybe a better hack than this? 
+def mark_tzlocal_nix(f): 
+    marks = [ 
+        pytest.mark.tzlocal, 
+        pytest.mark.skipif(IS_WIN, reason='requires Unix'), 
+    ] 
+ 
+    for mark in reversed(marks): 
+        f = mark(f) 
+ 
+    return f 
+ 
+ 
+@mark_tzlocal_nix 
+@pytest.mark.parametrize('tzvar', ['UTC', 'GMT0', 'UTC0']) 
+def test_tzlocal_utc_equal(tzvar): 
+    with TZEnvContext(tzvar): 
+        assert tz.tzlocal() == tz.UTC 
+ 
+ 
+@mark_tzlocal_nix 
+@pytest.mark.parametrize('tzvar', [ 
+    'Europe/London', 'America/New_York', 
+    'GMT0BST', 'EST5EDT']) 
+def test_tzlocal_utc_unequal(tzvar): 
+    with TZEnvContext(tzvar): 
+        assert tz.tzlocal() != tz.UTC 
+ 
+ 
+@mark_tzlocal_nix 
+def test_tzlocal_local_time_trim_colon(): 
+    with TZEnvContext(':/etc/localtime'): 
+        assert tz.gettz() is not None 
+ 
+ 
+@mark_tzlocal_nix 
+@pytest.mark.parametrize('tzvar, tzoff', [ 
+    ('EST5', tz.tzoffset('EST', -18000)), 
     ('GMT0', tz.tzoffset('GMT', 0)),
-    ('YAKT-9', tz.tzoffset('YAKT', timedelta(hours=9))),
-    ('JST-9', tz.tzoffset('JST', timedelta(hours=9))),
-])
-def test_tzlocal_offset_equal(tzvar, tzoff):
-    with TZEnvContext(tzvar):
-        # Including both to test both __eq__ and __ne__
-        assert tz.tzlocal() == tzoff
-        assert not (tz.tzlocal() != tzoff)
-
-
-@mark_tzlocal_nix
-@pytest.mark.parametrize('tzvar, tzoff', [
-    ('EST5EDT', tz.tzoffset('EST', -18000)),
-    ('GMT0BST', tz.tzoffset('GMT', 0)),
-    ('EST5', tz.tzoffset('EST', -14400)),
-    ('YAKT-9', tz.tzoffset('JST', timedelta(hours=9))),
-    ('JST-9', tz.tzoffset('YAKT', timedelta(hours=9))),
-])
-def test_tzlocal_offset_unequal(tzvar, tzoff):
-    with TZEnvContext(tzvar):
-        # Including both to test both __eq__ and __ne__
-        assert tz.tzlocal() != tzoff
-        assert not (tz.tzlocal() == tzoff)
-
-
-@pytest.mark.gettz
-class GettzTest(unittest.TestCase, TzFoldMixin):
-    gettz = staticmethod(tz.gettz)
-
-    def testGettz(self):
-        # bug 892569
-        str(self.gettz('UTC'))
-
-    def testGetTzEquality(self):
-        self.assertEqual(self.gettz('UTC'), self.gettz('UTC'))
-
-    def testTimeOnlyGettz(self):
-        # gettz returns None
-        tz_get = self.gettz('Europe/Minsk')
-        self.assertIs(dt_time(13, 20, tzinfo=tz_get).utcoffset(), None)
-
-    def testTimeOnlyGettzDST(self):
-        # gettz returns None
-        tz_get = self.gettz('Europe/Minsk')
-        self.assertIs(dt_time(13, 20, tzinfo=tz_get).dst(), None)
-
-    def testTimeOnlyGettzTzName(self):
-        tz_get = self.gettz('Europe/Minsk')
-        self.assertIs(dt_time(13, 20, tzinfo=tz_get).tzname(), None)
-
-    def testTimeOnlyFormatZ(self):
-        tz_get = self.gettz('Europe/Minsk')
-        t = dt_time(13, 20, tzinfo=tz_get)
-
-        self.assertEqual(t.strftime('%H%M%Z'), '1320')
-
-    def testPortugalDST(self):
-        # In 1996, Portugal changed from CET to WET
-        PORTUGAL = self.gettz('Portugal')
-
-        t_cet = datetime(1996, 3, 31, 1, 59, tzinfo=PORTUGAL)
-
-        self.assertEqual(t_cet.tzname(), 'CET')
-        self.assertEqual(t_cet.utcoffset(), timedelta(hours=1))
-        self.assertEqual(t_cet.dst(), timedelta(0))
-
-        t_west = datetime(1996, 3, 31, 2, 1, tzinfo=PORTUGAL)
-
-        self.assertEqual(t_west.tzname(), 'WEST')
-        self.assertEqual(t_west.utcoffset(), timedelta(hours=1))
-        self.assertEqual(t_west.dst(), timedelta(hours=1))
-
-    def testGettzCacheTzFile(self):
-        NYC1 = tz.gettz('America/New_York')
-        NYC2 = tz.gettz('America/New_York')
-
-        assert NYC1 is NYC2
-
-    def testGettzCacheTzLocal(self):
-        local1 = tz.gettz()
-        local2 = tz.gettz()
-
-        assert local1 is not local2
-
-
-@pytest.mark.gettz
+    ('YAKT-9', tz.tzoffset('YAKT', timedelta(hours=9))), 
+    ('JST-9', tz.tzoffset('JST', timedelta(hours=9))), 
+]) 
+def test_tzlocal_offset_equal(tzvar, tzoff): 
+    with TZEnvContext(tzvar): 
+        # Including both to test both __eq__ and __ne__ 
+        assert tz.tzlocal() == tzoff 
+        assert not (tz.tzlocal() != tzoff) 
+ 
+ 
+@mark_tzlocal_nix 
+@pytest.mark.parametrize('tzvar, tzoff', [ 
+    ('EST5EDT', tz.tzoffset('EST', -18000)), 
+    ('GMT0BST', tz.tzoffset('GMT', 0)), 
+    ('EST5', tz.tzoffset('EST', -14400)), 
+    ('YAKT-9', tz.tzoffset('JST', timedelta(hours=9))), 
+    ('JST-9', tz.tzoffset('YAKT', timedelta(hours=9))), 
+]) 
+def test_tzlocal_offset_unequal(tzvar, tzoff): 
+    with TZEnvContext(tzvar): 
+        # Including both to test both __eq__ and __ne__ 
+        assert tz.tzlocal() != tzoff 
+        assert not (tz.tzlocal() == tzoff) 
+ 
+ 
+@pytest.mark.gettz 
+class GettzTest(unittest.TestCase, TzFoldMixin): 
+    gettz = staticmethod(tz.gettz) 
+ 
+    def testGettz(self): 
+        # bug 892569 
+        str(self.gettz('UTC')) 
+ 
+    def testGetTzEquality(self): 
+        self.assertEqual(self.gettz('UTC'), self.gettz('UTC')) 
+ 
+    def testTimeOnlyGettz(self): 
+        # gettz returns None 
+        tz_get = self.gettz('Europe/Minsk') 
+        self.assertIs(dt_time(13, 20, tzinfo=tz_get).utcoffset(), None) 
+ 
+    def testTimeOnlyGettzDST(self): 
+        # gettz returns None 
+        tz_get = self.gettz('Europe/Minsk') 
+        self.assertIs(dt_time(13, 20, tzinfo=tz_get).dst(), None) 
+ 
+    def testTimeOnlyGettzTzName(self): 
+        tz_get = self.gettz('Europe/Minsk') 
+        self.assertIs(dt_time(13, 20, tzinfo=tz_get).tzname(), None) 
+ 
+    def testTimeOnlyFormatZ(self): 
+        tz_get = self.gettz('Europe/Minsk') 
+        t = dt_time(13, 20, tzinfo=tz_get) 
+ 
+        self.assertEqual(t.strftime('%H%M%Z'), '1320') 
+ 
+    def testPortugalDST(self): 
+        # In 1996, Portugal changed from CET to WET 
+        PORTUGAL = self.gettz('Portugal') 
+ 
+        t_cet = datetime(1996, 3, 31, 1, 59, tzinfo=PORTUGAL) 
+ 
+        self.assertEqual(t_cet.tzname(), 'CET') 
+        self.assertEqual(t_cet.utcoffset(), timedelta(hours=1)) 
+        self.assertEqual(t_cet.dst(), timedelta(0)) 
+ 
+        t_west = datetime(1996, 3, 31, 2, 1, tzinfo=PORTUGAL) 
+ 
+        self.assertEqual(t_west.tzname(), 'WEST') 
+        self.assertEqual(t_west.utcoffset(), timedelta(hours=1)) 
+        self.assertEqual(t_west.dst(), timedelta(hours=1)) 
+ 
+    def testGettzCacheTzFile(self): 
+        NYC1 = tz.gettz('America/New_York') 
+        NYC2 = tz.gettz('America/New_York') 
+ 
+        assert NYC1 is NYC2 
+ 
+    def testGettzCacheTzLocal(self): 
+        local1 = tz.gettz() 
+        local2 = tz.gettz() 
+ 
+        assert local1 is not local2 
+ 
+
+@pytest.mark.gettz 
 def test_gettz_same_result_for_none_and_empty_string():
     local_from_none = tz.gettz()
     local_from_empty_string = tz.gettz("")
@@ -1137,21 +1137,21 @@ def test_gettz_zone_wrong_type(badzone, exc_reason):
 
 
 @pytest.mark.gettz
-@pytest.mark.xfail(IS_WIN, reason='zoneinfo separately cached')
-def test_gettz_cache_clear():
-    NYC1 = tz.gettz('America/New_York')
-    tz.gettz.cache_clear()
-
-    NYC2 = tz.gettz('America/New_York')
-
-    assert NYC1 is not NYC2
-
+@pytest.mark.xfail(IS_WIN, reason='zoneinfo separately cached') 
+def test_gettz_cache_clear(): 
+    NYC1 = tz.gettz('America/New_York') 
+    tz.gettz.cache_clear() 
+ 
+    NYC2 = tz.gettz('America/New_York') 
+ 
+    assert NYC1 is not NYC2 
+ 
 @pytest.mark.gettz
 @pytest.mark.xfail(IS_WIN, reason='zoneinfo separately cached')
 def test_gettz_set_cache_size():
     tz.gettz.cache_clear()
     tz.gettz.set_cache_size(3)
-
+ 
     MONACO_ref = weakref.ref(tz.gettz('Europe/Monaco'))
     EASTER_ref = weakref.ref(tz.gettz('Pacific/Easter'))
     CURRIE_ref = weakref.ref(tz.gettz('Australia/Currie'))
@@ -1194,335 +1194,335 @@ def test_gettz_weakref():
     assert tz.gettz('America/New_York') is not NYC_ref()
 
 class ZoneInfoGettzTest(GettzTest):
-    def gettz(self, name):
-        zoneinfo_file = zoneinfo.get_zonefile_instance()
-        return zoneinfo_file.get(name)
-
-    def testZoneInfoFileStart1(self):
-        tz = self.gettz("EST5EDT")
-        self.assertEqual(datetime(2003, 4, 6, 1, 59, tzinfo=tz).tzname(), "EST",
-                         MISSING_TARBALL)
-        self.assertEqual(datetime(2003, 4, 6, 2, 00, tzinfo=tz).tzname(), "EDT")
-
-    def testZoneInfoFileEnd1(self):
-        tzc = self.gettz("EST5EDT")
-        self.assertEqual(datetime(2003, 10, 26, 0, 59, tzinfo=tzc).tzname(),
-                         "EDT", MISSING_TARBALL)
-
-        end_est = tz.enfold(datetime(2003, 10, 26, 1, 00, tzinfo=tzc), fold=1)
-        self.assertEqual(end_est.tzname(), "EST")
-
-    def testZoneInfoOffsetSignal(self):
-        utc = self.gettz("UTC")
-        nyc = self.gettz("America/New_York")
-        self.assertNotEqual(utc, None, MISSING_TARBALL)
-        self.assertNotEqual(nyc, None)
-        t0 = datetime(2007, 11, 4, 0, 30, tzinfo=nyc)
-        t1 = t0.astimezone(utc)
-        t2 = t1.astimezone(nyc)
-        self.assertEqual(t0, t2)
-        self.assertEqual(nyc.dst(t0), timedelta(hours=1))
-
-    def testZoneInfoCopy(self):
-        # copy.copy() called on a ZoneInfo file was returning the same instance
-        CHI = self.gettz('America/Chicago')
-        CHI_COPY = copy.copy(CHI)
-
-        self.assertIsNot(CHI, CHI_COPY)
-        self.assertEqual(CHI, CHI_COPY)
-
-    def testZoneInfoDeepCopy(self):
-        CHI = self.gettz('America/Chicago')
-        CHI_COPY = copy.deepcopy(CHI)
-
-        self.assertIsNot(CHI, CHI_COPY)
-        self.assertEqual(CHI, CHI_COPY)
-
-    def testZoneInfoInstanceCaching(self):
-        zif_0 = zoneinfo.get_zonefile_instance()
-        zif_1 = zoneinfo.get_zonefile_instance()
-
-        self.assertIs(zif_0, zif_1)
-
-    def testZoneInfoNewInstance(self):
-        zif_0 = zoneinfo.get_zonefile_instance()
-        zif_1 = zoneinfo.get_zonefile_instance(new_instance=True)
-        zif_2 = zoneinfo.get_zonefile_instance()
-
-        self.assertIsNot(zif_0, zif_1)
-        self.assertIs(zif_1, zif_2)
-
-    def testZoneInfoDeprecated(self):
+    def gettz(self, name): 
+        zoneinfo_file = zoneinfo.get_zonefile_instance() 
+        return zoneinfo_file.get(name) 
+ 
+    def testZoneInfoFileStart1(self): 
+        tz = self.gettz("EST5EDT") 
+        self.assertEqual(datetime(2003, 4, 6, 1, 59, tzinfo=tz).tzname(), "EST", 
+                         MISSING_TARBALL) 
+        self.assertEqual(datetime(2003, 4, 6, 2, 00, tzinfo=tz).tzname(), "EDT") 
+ 
+    def testZoneInfoFileEnd1(self): 
+        tzc = self.gettz("EST5EDT") 
+        self.assertEqual(datetime(2003, 10, 26, 0, 59, tzinfo=tzc).tzname(), 
+                         "EDT", MISSING_TARBALL) 
+ 
+        end_est = tz.enfold(datetime(2003, 10, 26, 1, 00, tzinfo=tzc), fold=1) 
+        self.assertEqual(end_est.tzname(), "EST") 
+ 
+    def testZoneInfoOffsetSignal(self): 
+        utc = self.gettz("UTC") 
+        nyc = self.gettz("America/New_York") 
+        self.assertNotEqual(utc, None, MISSING_TARBALL) 
+        self.assertNotEqual(nyc, None) 
+        t0 = datetime(2007, 11, 4, 0, 30, tzinfo=nyc) 
+        t1 = t0.astimezone(utc) 
+        t2 = t1.astimezone(nyc) 
+        self.assertEqual(t0, t2) 
+        self.assertEqual(nyc.dst(t0), timedelta(hours=1)) 
+ 
+    def testZoneInfoCopy(self): 
+        # copy.copy() called on a ZoneInfo file was returning the same instance 
+        CHI = self.gettz('America/Chicago') 
+        CHI_COPY = copy.copy(CHI) 
+ 
+        self.assertIsNot(CHI, CHI_COPY) 
+        self.assertEqual(CHI, CHI_COPY) 
+ 
+    def testZoneInfoDeepCopy(self): 
+        CHI = self.gettz('America/Chicago') 
+        CHI_COPY = copy.deepcopy(CHI) 
+ 
+        self.assertIsNot(CHI, CHI_COPY) 
+        self.assertEqual(CHI, CHI_COPY) 
+ 
+    def testZoneInfoInstanceCaching(self): 
+        zif_0 = zoneinfo.get_zonefile_instance() 
+        zif_1 = zoneinfo.get_zonefile_instance() 
+ 
+        self.assertIs(zif_0, zif_1) 
+ 
+    def testZoneInfoNewInstance(self): 
+        zif_0 = zoneinfo.get_zonefile_instance() 
+        zif_1 = zoneinfo.get_zonefile_instance(new_instance=True) 
+        zif_2 = zoneinfo.get_zonefile_instance() 
+ 
+        self.assertIsNot(zif_0, zif_1) 
+        self.assertIs(zif_1, zif_2) 
+ 
+    def testZoneInfoDeprecated(self): 
         with pytest.warns(DeprecationWarning):
-            zoneinfo.gettz('US/Eastern')
-
-    def testZoneInfoMetadataDeprecated(self):
+            zoneinfo.gettz('US/Eastern') 
+ 
+    def testZoneInfoMetadataDeprecated(self): 
         with pytest.warns(DeprecationWarning):
-            zoneinfo.gettz_db_metadata()
-
-
-class TZRangeTest(unittest.TestCase, TzFoldMixin):
-    TZ_EST = tz.tzrange('EST', timedelta(hours=-5),
-                        'EDT', timedelta(hours=-4),
-                        start=relativedelta(month=3, day=1, hour=2,
-                                            weekday=SU(+2)),
-                        end=relativedelta(month=11, day=1, hour=1,
-                                          weekday=SU(+1)))
-
-    TZ_AEST = tz.tzrange('AEST', timedelta(hours=10),
-                         'AEDT', timedelta(hours=11),
-                         start=relativedelta(month=10, day=1, hour=2,
-                                             weekday=SU(+1)),
-                         end=relativedelta(month=4, day=1, hour=2,
-                                           weekday=SU(+1)))
-
-    TZ_LON = tz.tzrange('GMT', timedelta(hours=0),
-                        'BST', timedelta(hours=1),
-                        start=relativedelta(month=3, day=31, weekday=SU(-1),
-                                            hours=2),
-                        end=relativedelta(month=10, day=31, weekday=SU(-1),
-                                          hours=1))
-    # POSIX string for UTC
-    UTC = 'UTC'
-
-    def gettz(self, tzname):
-        tzname_map = {'Australia/Sydney': self.TZ_AEST,
-                      'America/Toronto': self.TZ_EST,
-                      'America/New_York': self.TZ_EST,
-                      'Europe/London': self.TZ_LON}
-
-        return tzname_map[tzname]
-
-    def testRangeCmp1(self):
-        self.assertEqual(tz.tzstr("EST5EDT"),
-                         tz.tzrange("EST", -18000, "EDT", -14400,
-                                 relativedelta(hours=+2,
-                                               month=4, day=1,
-                                               weekday=SU(+1)),
-                                 relativedelta(hours=+1,
-                                               month=10, day=31,
-                                               weekday=SU(-1))))
-
-    def testRangeCmp2(self):
-        self.assertEqual(tz.tzstr("EST5EDT"),
-                         tz.tzrange("EST", -18000, "EDT"))
-
-    def testRangeOffsets(self):
-        TZR = tz.tzrange('EST', -18000, 'EDT', -14400,
-                         start=relativedelta(hours=2, month=4, day=1,
-                                             weekday=SU(+2)),
-                         end=relativedelta(hours=1, month=10, day=31,
-                                           weekday=SU(-1)))
-
-        dt_std = datetime(2014, 4, 11, 12, 0, tzinfo=TZR)  # STD
-        dt_dst = datetime(2016, 4, 11, 12, 0, tzinfo=TZR)  # DST
-
-        dst_zero = timedelta(0)
-        dst_hour = timedelta(hours=1)
-
-        std_offset = timedelta(hours=-5)
-        dst_offset = timedelta(hours=-4)
-
-        # Check dst()
-        self.assertEqual(dt_std.dst(), dst_zero)
-        self.assertEqual(dt_dst.dst(), dst_hour)
-
-        # Check utcoffset()
-        self.assertEqual(dt_std.utcoffset(), std_offset)
-        self.assertEqual(dt_dst.utcoffset(), dst_offset)
-
-        # Check tzname
-        self.assertEqual(dt_std.tzname(), 'EST')
-        self.assertEqual(dt_dst.tzname(), 'EDT')
-
-    def testTimeOnlyRangeFixed(self):
-        # This is a fixed-offset zone, so tzrange allows this
-        tz_range = tz.tzrange('dflt', stdoffset=timedelta(hours=-3))
-        self.assertEqual(dt_time(13, 20, tzinfo=tz_range).utcoffset(),
-                         timedelta(hours=-3))
-
-    def testTimeOnlyRange(self):
-        # tzrange returns None because this zone has DST
-        tz_range = tz.tzrange('EST', timedelta(hours=-5),
-                              'EDT', timedelta(hours=-4))
-        self.assertIs(dt_time(13, 20, tzinfo=tz_range).utcoffset(), None)
-
-    def testBrokenIsDstHandling(self):
-        # tzrange._isdst() was using a date() rather than a datetime().
-        # Issue reported by Lennart Regebro.
+            zoneinfo.gettz_db_metadata() 
+ 
+ 
+class TZRangeTest(unittest.TestCase, TzFoldMixin): 
+    TZ_EST = tz.tzrange('EST', timedelta(hours=-5), 
+                        'EDT', timedelta(hours=-4), 
+                        start=relativedelta(month=3, day=1, hour=2, 
+                                            weekday=SU(+2)), 
+                        end=relativedelta(month=11, day=1, hour=1, 
+                                          weekday=SU(+1))) 
+ 
+    TZ_AEST = tz.tzrange('AEST', timedelta(hours=10), 
+                         'AEDT', timedelta(hours=11), 
+                         start=relativedelta(month=10, day=1, hour=2, 
+                                             weekday=SU(+1)), 
+                         end=relativedelta(month=4, day=1, hour=2, 
+                                           weekday=SU(+1))) 
+ 
+    TZ_LON = tz.tzrange('GMT', timedelta(hours=0), 
+                        'BST', timedelta(hours=1), 
+                        start=relativedelta(month=3, day=31, weekday=SU(-1), 
+                                            hours=2), 
+                        end=relativedelta(month=10, day=31, weekday=SU(-1), 
+                                          hours=1)) 
+    # POSIX string for UTC 
+    UTC = 'UTC' 
+ 
+    def gettz(self, tzname): 
+        tzname_map = {'Australia/Sydney': self.TZ_AEST, 
+                      'America/Toronto': self.TZ_EST, 
+                      'America/New_York': self.TZ_EST, 
+                      'Europe/London': self.TZ_LON} 
+ 
+        return tzname_map[tzname] 
+ 
+    def testRangeCmp1(self): 
+        self.assertEqual(tz.tzstr("EST5EDT"), 
+                         tz.tzrange("EST", -18000, "EDT", -14400, 
+                                 relativedelta(hours=+2, 
+                                               month=4, day=1, 
+                                               weekday=SU(+1)), 
+                                 relativedelta(hours=+1, 
+                                               month=10, day=31, 
+                                               weekday=SU(-1)))) 
+ 
+    def testRangeCmp2(self): 
+        self.assertEqual(tz.tzstr("EST5EDT"), 
+                         tz.tzrange("EST", -18000, "EDT")) 
+ 
+    def testRangeOffsets(self): 
+        TZR = tz.tzrange('EST', -18000, 'EDT', -14400, 
+                         start=relativedelta(hours=2, month=4, day=1, 
+                                             weekday=SU(+2)), 
+                         end=relativedelta(hours=1, month=10, day=31, 
+                                           weekday=SU(-1))) 
+ 
+        dt_std = datetime(2014, 4, 11, 12, 0, tzinfo=TZR)  # STD 
+        dt_dst = datetime(2016, 4, 11, 12, 0, tzinfo=TZR)  # DST 
+ 
+        dst_zero = timedelta(0) 
+        dst_hour = timedelta(hours=1) 
+ 
+        std_offset = timedelta(hours=-5) 
+        dst_offset = timedelta(hours=-4) 
+ 
+        # Check dst() 
+        self.assertEqual(dt_std.dst(), dst_zero) 
+        self.assertEqual(dt_dst.dst(), dst_hour) 
+ 
+        # Check utcoffset() 
+        self.assertEqual(dt_std.utcoffset(), std_offset) 
+        self.assertEqual(dt_dst.utcoffset(), dst_offset) 
+ 
+        # Check tzname 
+        self.assertEqual(dt_std.tzname(), 'EST') 
+        self.assertEqual(dt_dst.tzname(), 'EDT') 
+ 
+    def testTimeOnlyRangeFixed(self): 
+        # This is a fixed-offset zone, so tzrange allows this 
+        tz_range = tz.tzrange('dflt', stdoffset=timedelta(hours=-3)) 
+        self.assertEqual(dt_time(13, 20, tzinfo=tz_range).utcoffset(), 
+                         timedelta(hours=-3)) 
+ 
+    def testTimeOnlyRange(self): 
+        # tzrange returns None because this zone has DST 
+        tz_range = tz.tzrange('EST', timedelta(hours=-5), 
+                              'EDT', timedelta(hours=-4)) 
+        self.assertIs(dt_time(13, 20, tzinfo=tz_range).utcoffset(), None) 
+ 
+    def testBrokenIsDstHandling(self): 
+        # tzrange._isdst() was using a date() rather than a datetime(). 
+        # Issue reported by Lennart Regebro. 
         dt = datetime(2007, 8, 6, 4, 10, tzinfo=tz.UTC)
-        self.assertEqual(dt.astimezone(tz=tz.gettz("GMT+2")),
-                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2")))
-
-    def testRangeTimeDelta(self):
-        # Test that tzrange can be specified with a timedelta instead of an int.
-        EST5EDT_td = tz.tzrange('EST', timedelta(hours=-5),
-                                'EDT', timedelta(hours=-4))
-
-        EST5EDT_sec = tz.tzrange('EST', -18000,
-                                 'EDT', -14400)
-
-        self.assertEqual(EST5EDT_td, EST5EDT_sec)
-
-    def testRangeEquality(self):
-        TZR1 = tz.tzrange('EST', -18000, 'EDT', -14400)
-
-        # Standard abbreviation different
-        TZR2 = tz.tzrange('ET', -18000, 'EDT', -14400)
-        self.assertNotEqual(TZR1, TZR2)
-
-        # DST abbreviation different
-        TZR3 = tz.tzrange('EST', -18000, 'EMT', -14400)
-        self.assertNotEqual(TZR1, TZR3)
-
-        # STD offset different
-        TZR4 = tz.tzrange('EST', -14000, 'EDT', -14400)
-        self.assertNotEqual(TZR1, TZR4)
-
-        # DST offset different
-        TZR5 = tz.tzrange('EST', -18000, 'EDT', -18000)
-        self.assertNotEqual(TZR1, TZR5)
-
-        # Start delta different
-        TZR6 = tz.tzrange('EST', -18000, 'EDT', -14400,
-                          start=relativedelta(hours=+1, month=3,
-                                              day=1, weekday=SU(+2)))
-        self.assertNotEqual(TZR1, TZR6)
-
-        # End delta different
-        TZR7 = tz.tzrange('EST', -18000, 'EDT', -14400,
-            end=relativedelta(hours=+1, month=11,
-                              day=1, weekday=SU(+2)))
-        self.assertNotEqual(TZR1, TZR7)
-
-    def testRangeInequalityUnsupported(self):
-        TZR = tz.tzrange('EST', -18000, 'EDT', -14400)
-
-        self.assertFalse(TZR == 4)
-        self.assertTrue(TZR == ComparesEqual)
-        self.assertFalse(TZR != ComparesEqual)
-
-
-@pytest.mark.tzstr
-class TZStrTest(unittest.TestCase, TzFoldMixin):
-    # POSIX string indicating change to summer time on the 2nd Sunday in March
-    # at 2AM, and ending the 1st Sunday in November at 2AM. (valid >= 2007)
-    TZ_EST = 'EST+5EDT,M3.2.0/2,M11.1.0/2'
-
-    # POSIX string for AEST/AEDT (valid >= 2008)
-    TZ_AEST = 'AEST-10AEDT,M10.1.0/2,M4.1.0/3'
-
-    # POSIX string for GMT/BST
-    TZ_LON = 'GMT0BST,M3.5.0,M10.5.0'
-
-    def gettz(self, tzname):
-        # Actual time zone changes are handled by the _gettz_context function
-        tzname_map = {'Australia/Sydney': self.TZ_AEST,
-                      'America/Toronto': self.TZ_EST,
-                      'America/New_York': self.TZ_EST,
-                      'Europe/London': self.TZ_LON}
-
-        return tz.tzstr(tzname_map[tzname])
-
-    def testStrStr(self):
-        # Test that tz.tzstr() won't throw an error if given a str instead
-        # of a unicode literal.
-        self.assertEqual(datetime(2003, 4, 6, 1, 59,
-                                  tzinfo=tz.tzstr(str("EST5EDT"))).tzname(), "EST")
-        self.assertEqual(datetime(2003, 4, 6, 2, 00,
-                                  tzinfo=tz.tzstr(str("EST5EDT"))).tzname(), "EDT")
-
-    def testStrInequality(self):
-        TZS1 = tz.tzstr('EST5EDT4')
-
-        # Standard abbreviation different
-        TZS2 = tz.tzstr('ET5EDT4')
-        self.assertNotEqual(TZS1, TZS2)
-
-        # DST abbreviation different
-        TZS3 = tz.tzstr('EST5EMT')
-        self.assertNotEqual(TZS1, TZS3)
-
-        # STD offset different
-        TZS4 = tz.tzstr('EST4EDT4')
-        self.assertNotEqual(TZS1, TZS4)
-
-        # DST offset different
-        TZS5 = tz.tzstr('EST5EDT3')
-        self.assertNotEqual(TZS1, TZS5)
-
-    def testStrInequalityStartEnd(self):
-        TZS1 = tz.tzstr('EST5EDT4')
-
-        # Start delta different
-        TZS2 = tz.tzstr('EST5EDT4,M4.2.0/02:00:00,M10-5-0/02:00')
-        self.assertNotEqual(TZS1, TZS2)
-
-        # End delta different
-        TZS3 = tz.tzstr('EST5EDT4,M4.2.0/02:00:00,M11-5-0/02:00')
-        self.assertNotEqual(TZS1, TZS3)
-
-    def testPosixOffset(self):
-        TZ1 = tz.tzstr('UTC-3')
-        self.assertEqual(datetime(2015, 1, 1, tzinfo=TZ1).utcoffset(),
-                         timedelta(hours=-3))
-
-        TZ2 = tz.tzstr('UTC-3', posix_offset=True)
-        self.assertEqual(datetime(2015, 1, 1, tzinfo=TZ2).utcoffset(),
-                         timedelta(hours=+3))
-
-    def testStrInequalityUnsupported(self):
-        TZS = tz.tzstr('EST5EDT')
-
-        self.assertFalse(TZS == 4)
-        self.assertTrue(TZS == ComparesEqual)
-        self.assertFalse(TZS != ComparesEqual)
-
-    def testTzStrRepr(self):
-        TZS1 = tz.tzstr('EST5EDT4')
-        TZS2 = tz.tzstr('EST')
-
-        self.assertEqual(repr(TZS1), "tzstr(" + repr('EST5EDT4') + ")")
-        self.assertEqual(repr(TZS2), "tzstr(" + repr('EST') + ")")
-
-    def testTzStrFailure(self):
-        with self.assertRaises(ValueError):
-            tz.tzstr('InvalidString;439999')
-
-    def testTzStrSingleton(self):
-        tz1 = tz.tzstr('EST5EDT')
-        tz2 = tz.tzstr('CST4CST')
-        tz3 = tz.tzstr('EST5EDT')
-
-        self.assertIsNot(tz1, tz2)
-        self.assertIs(tz1, tz3)
-
-    def testTzStrSingletonPosix(self):
-        tz_t1 = tz.tzstr('GMT+3', posix_offset=True)
-        tz_f1 = tz.tzstr('GMT+3', posix_offset=False)
-
-        tz_t2 = tz.tzstr('GMT+3', posix_offset=True)
-        tz_f2 = tz.tzstr('GMT+3', posix_offset=False)
-
-        self.assertIs(tz_t1, tz_t2)
-        self.assertIsNot(tz_t1, tz_f1)
-
-        self.assertIs(tz_f1, tz_f2)
-
-    def testTzStrInstance(self):
-        tz1 = tz.tzstr('EST5EDT')
-        tz2 = tz.tzstr.instance('EST5EDT')
-        tz3 = tz.tzstr.instance('EST5EDT')
-
-        assert tz1 is not tz2
-        assert tz2 is not tz3
-
-        # Ensure that these still are all the same zone
-        assert tz1 == tz2 == tz3
-
+        self.assertEqual(dt.astimezone(tz=tz.gettz("GMT+2")), 
+                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2"))) 
+ 
+    def testRangeTimeDelta(self): 
+        # Test that tzrange can be specified with a timedelta instead of an int. 
+        EST5EDT_td = tz.tzrange('EST', timedelta(hours=-5), 
+                                'EDT', timedelta(hours=-4)) 
+ 
+        EST5EDT_sec = tz.tzrange('EST', -18000, 
+                                 'EDT', -14400) 
+ 
+        self.assertEqual(EST5EDT_td, EST5EDT_sec) 
+ 
+    def testRangeEquality(self): 
+        TZR1 = tz.tzrange('EST', -18000, 'EDT', -14400) 
+ 
+        # Standard abbreviation different 
+        TZR2 = tz.tzrange('ET', -18000, 'EDT', -14400) 
+        self.assertNotEqual(TZR1, TZR2) 
+ 
+        # DST abbreviation different 
+        TZR3 = tz.tzrange('EST', -18000, 'EMT', -14400) 
+        self.assertNotEqual(TZR1, TZR3) 
+ 
+        # STD offset different 
+        TZR4 = tz.tzrange('EST', -14000, 'EDT', -14400) 
+        self.assertNotEqual(TZR1, TZR4) 
+ 
+        # DST offset different 
+        TZR5 = tz.tzrange('EST', -18000, 'EDT', -18000) 
+        self.assertNotEqual(TZR1, TZR5) 
+ 
+        # Start delta different 
+        TZR6 = tz.tzrange('EST', -18000, 'EDT', -14400, 
+                          start=relativedelta(hours=+1, month=3, 
+                                              day=1, weekday=SU(+2))) 
+        self.assertNotEqual(TZR1, TZR6) 
+ 
+        # End delta different 
+        TZR7 = tz.tzrange('EST', -18000, 'EDT', -14400, 
+            end=relativedelta(hours=+1, month=11, 
+                              day=1, weekday=SU(+2))) 
+        self.assertNotEqual(TZR1, TZR7) 
+ 
+    def testRangeInequalityUnsupported(self): 
+        TZR = tz.tzrange('EST', -18000, 'EDT', -14400) 
+ 
+        self.assertFalse(TZR == 4) 
+        self.assertTrue(TZR == ComparesEqual) 
+        self.assertFalse(TZR != ComparesEqual) 
+ 
+ 
+@pytest.mark.tzstr 
+class TZStrTest(unittest.TestCase, TzFoldMixin): 
+    # POSIX string indicating change to summer time on the 2nd Sunday in March 
+    # at 2AM, and ending the 1st Sunday in November at 2AM. (valid >= 2007) 
+    TZ_EST = 'EST+5EDT,M3.2.0/2,M11.1.0/2' 
+ 
+    # POSIX string for AEST/AEDT (valid >= 2008) 
+    TZ_AEST = 'AEST-10AEDT,M10.1.0/2,M4.1.0/3' 
+ 
+    # POSIX string for GMT/BST 
+    TZ_LON = 'GMT0BST,M3.5.0,M10.5.0' 
+ 
+    def gettz(self, tzname): 
+        # Actual time zone changes are handled by the _gettz_context function 
+        tzname_map = {'Australia/Sydney': self.TZ_AEST, 
+                      'America/Toronto': self.TZ_EST, 
+                      'America/New_York': self.TZ_EST, 
+                      'Europe/London': self.TZ_LON} 
+ 
+        return tz.tzstr(tzname_map[tzname]) 
+ 
+    def testStrStr(self): 
+        # Test that tz.tzstr() won't throw an error if given a str instead 
+        # of a unicode literal. 
+        self.assertEqual(datetime(2003, 4, 6, 1, 59, 
+                                  tzinfo=tz.tzstr(str("EST5EDT"))).tzname(), "EST") 
+        self.assertEqual(datetime(2003, 4, 6, 2, 00, 
+                                  tzinfo=tz.tzstr(str("EST5EDT"))).tzname(), "EDT") 
+ 
+    def testStrInequality(self): 
+        TZS1 = tz.tzstr('EST5EDT4') 
+ 
+        # Standard abbreviation different 
+        TZS2 = tz.tzstr('ET5EDT4') 
+        self.assertNotEqual(TZS1, TZS2) 
+ 
+        # DST abbreviation different 
+        TZS3 = tz.tzstr('EST5EMT') 
+        self.assertNotEqual(TZS1, TZS3) 
+ 
+        # STD offset different 
+        TZS4 = tz.tzstr('EST4EDT4') 
+        self.assertNotEqual(TZS1, TZS4) 
+ 
+        # DST offset different 
+        TZS5 = tz.tzstr('EST5EDT3') 
+        self.assertNotEqual(TZS1, TZS5) 
+ 
+    def testStrInequalityStartEnd(self): 
+        TZS1 = tz.tzstr('EST5EDT4') 
+ 
+        # Start delta different 
+        TZS2 = tz.tzstr('EST5EDT4,M4.2.0/02:00:00,M10-5-0/02:00') 
+        self.assertNotEqual(TZS1, TZS2) 
+ 
+        # End delta different 
+        TZS3 = tz.tzstr('EST5EDT4,M4.2.0/02:00:00,M11-5-0/02:00') 
+        self.assertNotEqual(TZS1, TZS3) 
+ 
+    def testPosixOffset(self): 
+        TZ1 = tz.tzstr('UTC-3') 
+        self.assertEqual(datetime(2015, 1, 1, tzinfo=TZ1).utcoffset(), 
+                         timedelta(hours=-3)) 
+ 
+        TZ2 = tz.tzstr('UTC-3', posix_offset=True) 
+        self.assertEqual(datetime(2015, 1, 1, tzinfo=TZ2).utcoffset(), 
+                         timedelta(hours=+3)) 
+ 
+    def testStrInequalityUnsupported(self): 
+        TZS = tz.tzstr('EST5EDT') 
+ 
+        self.assertFalse(TZS == 4) 
+        self.assertTrue(TZS == ComparesEqual) 
+        self.assertFalse(TZS != ComparesEqual) 
+ 
+    def testTzStrRepr(self): 
+        TZS1 = tz.tzstr('EST5EDT4') 
+        TZS2 = tz.tzstr('EST') 
+ 
+        self.assertEqual(repr(TZS1), "tzstr(" + repr('EST5EDT4') + ")") 
+        self.assertEqual(repr(TZS2), "tzstr(" + repr('EST') + ")") 
+ 
+    def testTzStrFailure(self): 
+        with self.assertRaises(ValueError): 
+            tz.tzstr('InvalidString;439999') 
+ 
+    def testTzStrSingleton(self): 
+        tz1 = tz.tzstr('EST5EDT') 
+        tz2 = tz.tzstr('CST4CST') 
+        tz3 = tz.tzstr('EST5EDT') 
+ 
+        self.assertIsNot(tz1, tz2) 
+        self.assertIs(tz1, tz3) 
+ 
+    def testTzStrSingletonPosix(self): 
+        tz_t1 = tz.tzstr('GMT+3', posix_offset=True) 
+        tz_f1 = tz.tzstr('GMT+3', posix_offset=False) 
+ 
+        tz_t2 = tz.tzstr('GMT+3', posix_offset=True) 
+        tz_f2 = tz.tzstr('GMT+3', posix_offset=False) 
+ 
+        self.assertIs(tz_t1, tz_t2) 
+        self.assertIsNot(tz_t1, tz_f1) 
+ 
+        self.assertIs(tz_f1, tz_f2) 
+ 
+    def testTzStrInstance(self): 
+        tz1 = tz.tzstr('EST5EDT') 
+        tz2 = tz.tzstr.instance('EST5EDT') 
+        tz3 = tz.tzstr.instance('EST5EDT') 
+ 
+        assert tz1 is not tz2 
+        assert tz2 is not tz3 
+ 
+        # Ensure that these still are all the same zone 
+        assert tz1 == tz2 == tz3 
+ 
 
 @pytest.mark.smoke
-@pytest.mark.tzstr
+@pytest.mark.tzstr 
 def test_tzstr_weakref():
     tz_t1 = tz.tzstr('EST5EDT')
     tz_t2_ref = weakref.ref(tz.tzstr('EST5EDT'))
@@ -1543,547 +1543,547 @@ def test_tzstr_weakref():
 
 
 @pytest.mark.tzstr
-@pytest.mark.parametrize('tz_str,expected', [
-    # From https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
-    ('', tz.tzrange(None)),     # TODO: Should change this so tz.tzrange('') works
-    ('EST+5EDT,M3.2.0/2,M11.1.0/12',
-     tz.tzrange('EST', -18000, 'EDT', -14400,
-        start=relativedelta(month=3, day=1, weekday=SU(2), hours=2),
-        end=relativedelta(month=11, day=1, weekday=SU(1), hours=11))),
-    ('WART4WARST,J1/0,J365/25',  # This is DST all year, Western Argentina Summer Time
-     tz.tzrange('WART', timedelta(hours=-4), 'WARST',
-        start=relativedelta(month=1, day=1, hours=0),
-        end=relativedelta(month=12, day=31, days=1))),
-    ('IST-2IDT,M3.4.4/26,M10.5.0',      # Israel Standard / Daylight Time
-     tz.tzrange('IST', timedelta(hours=2), 'IDT',
-        start=relativedelta(month=3, day=1, weekday=TH(4), days=1, hours=2),
-        end=relativedelta(month=10, day=31, weekday=SU(-1), hours=1))),
-    ('WGT3WGST,M3.5.0/2,M10.5.0/1',
-     tz.tzrange('WGT', timedelta(hours=-3), 'WGST',
-        start=relativedelta(month=3, day=31, weekday=SU(-1), hours=2),
-        end=relativedelta(month=10, day=31, weekday=SU(-1), hours=0))),
-
-    # Different offset specifications
-    ('WGT0300WGST',
-     tz.tzrange('WGT', timedelta(hours=-3), 'WGST')),
-    ('WGT03:00WGST',
-     tz.tzrange('WGT', timedelta(hours=-3), 'WGST')),
-    ('AEST-1100AEDT',
-     tz.tzrange('AEST', timedelta(hours=11), 'AEDT')),
-    ('AEST-11:00AEDT',
-     tz.tzrange('AEST', timedelta(hours=11), 'AEDT')),
-
-    # Different time formats
-    ('EST5EDT,M3.2.0/4:00,M11.1.0/3:00',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4),
-        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))),
-    ('EST5EDT,M3.2.0/04:00,M11.1.0/03:00',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4),
-        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))),
-    ('EST5EDT,M3.2.0/0400,M11.1.0/0300',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4),
-        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))),
-])
-def test_valid_GNU_tzstr(tz_str, expected):
-    tzi = tz.tzstr(tz_str)
-
-    assert tzi == expected
-
-
-@pytest.mark.tzstr
-@pytest.mark.parametrize('tz_str, expected', [
-    ('EST5EDT,5,4,0,7200,11,3,0,7200',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(month=5, day=1, weekday=SU(+4), hours=+2),
-        end=relativedelta(month=11, day=1, weekday=SU(+3), hours=+1))),
-    ('EST5EDT,5,-4,0,7200,11,3,0,7200',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(hours=+2, month=5, day=31, weekday=SU(-4)),
-        end=relativedelta(hours=+1, month=11, day=1, weekday=SU(+3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200,3600',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200,3600',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200,-3600',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT', timedelta(hours=-6),
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=+3, month=11, day=31, weekday=SU(-3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200,+7200',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT', timedelta(hours=-3),
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=0, month=11, day=31, weekday=SU(-3)))),
-    ('EST5EDT,5,4,0,7200,11,-3,0,7200,+3600',
-     tz.tzrange('EST', timedelta(hours=-5), 'EDT',
-        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)),
-        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))),
-])
-def test_valid_dateutil_format(tz_str, expected):
-    # This tests the dateutil-specific format that is used widely in the tests
-    # and examples. It is unclear where this format originated from.
-    with pytest.warns(tz.DeprecatedTzFormatWarning):
-        tzi = tz.tzstr.instance(tz_str)
-
-    assert tzi == expected
-
-
-@pytest.mark.tzstr
-@pytest.mark.parametrize('tz_str', [
-    'hdfiughdfuig,dfughdfuigpu87ñ::',
-    ',dfughdfuigpu87ñ::',
-    '-1:WART4WARST,J1,J365/25',
-    'WART4WARST,J1,J365/-25',
-    'IST-2IDT,M3.4.-1/26,M10.5.0',
-    'IST-2IDT,M3,2000,1/26,M10,5,0'
-])
-def test_invalid_GNU_tzstr(tz_str):
-    with pytest.raises(ValueError):
-        tz.tzstr(tz_str)
-
-
-# Different representations of the same default rule set
-DEFAULT_TZSTR_RULES_EQUIV_2003 = [
-    'EST5EDT',
-    'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00',
-    'EST5EDT4,95/02:00:00,298/02:00',
-    'EST5EDT4,J96/02:00:00,J299/02:00',
-    'EST5EDT4,J96/02:00:00,J299/02'
-]
-
-
-@pytest.mark.tzstr
-@pytest.mark.parametrize('tz_str', DEFAULT_TZSTR_RULES_EQUIV_2003)
-def test_tzstr_default_start(tz_str):
-    tzi = tz.tzstr(tz_str)
-    dt_std = datetime(2003, 4, 6, 1, 59, tzinfo=tzi)
-    dt_dst = datetime(2003, 4, 6, 2, 00, tzinfo=tzi)
-
-    assert get_timezone_tuple(dt_std) == EST_TUPLE
-    assert get_timezone_tuple(dt_dst) == EDT_TUPLE
-
-
-@pytest.mark.tzstr
-@pytest.mark.parametrize('tz_str', DEFAULT_TZSTR_RULES_EQUIV_2003)
-def test_tzstr_default_end(tz_str):
-    tzi = tz.tzstr(tz_str)
-    dt_dst = datetime(2003, 10, 26, 0, 59, tzinfo=tzi)
-    dt_dst_ambig = datetime(2003, 10, 26, 1, 00, tzinfo=tzi)
-    dt_std_ambig = tz.enfold(dt_dst_ambig, fold=1)
-    dt_std = datetime(2003, 10, 26, 2, 00, tzinfo=tzi)
-
-    assert get_timezone_tuple(dt_dst) == EDT_TUPLE
-    assert get_timezone_tuple(dt_dst_ambig) == EDT_TUPLE
-    assert get_timezone_tuple(dt_std_ambig) == EST_TUPLE
-    assert get_timezone_tuple(dt_std) == EST_TUPLE
-
-
-@pytest.mark.tzstr
-@pytest.mark.parametrize('tzstr_1', ['EST5EDT',
-                                     'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00'])
-@pytest.mark.parametrize('tzstr_2', ['EST5EDT',
-                                     'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00'])
-def test_tzstr_default_cmp(tzstr_1, tzstr_2):
-    tz1 = tz.tzstr(tzstr_1)
-    tz2 = tz.tzstr(tzstr_2)
-
-    assert tz1 == tz2
-
-class TZICalTest(unittest.TestCase, TzFoldMixin):
-    def _gettz_str_tuple(self, tzname):
-        TZ_EST = (
-            'BEGIN:VTIMEZONE',
-            'TZID:US-Eastern',
-            'BEGIN:STANDARD',
-            'DTSTART:19971029T020000',
-            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=11',
-            'TZOFFSETFROM:-0400',
-            'TZOFFSETTO:-0500',
-            'TZNAME:EST',
-            'END:STANDARD',
-            'BEGIN:DAYLIGHT',
-            'DTSTART:19980301T020000',
-            'RRULE:FREQ=YEARLY;BYDAY=+2SU;BYMONTH=03',
-            'TZOFFSETFROM:-0500',
-            'TZOFFSETTO:-0400',
-            'TZNAME:EDT',
-            'END:DAYLIGHT',
-            'END:VTIMEZONE'
-        )
-
-        TZ_PST = (
-            'BEGIN:VTIMEZONE',
-            'TZID:US-Pacific',
-            'BEGIN:STANDARD',
-            'DTSTART:19971029T020000',
-            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=11',
-            'TZOFFSETFROM:-0700',
-            'TZOFFSETTO:-0800',
-            'TZNAME:PST',
-            'END:STANDARD',
-            'BEGIN:DAYLIGHT',
-            'DTSTART:19980301T020000',
-            'RRULE:FREQ=YEARLY;BYDAY=+2SU;BYMONTH=03',
-            'TZOFFSETFROM:-0800',
-            'TZOFFSETTO:-0700',
-            'TZNAME:PDT',
-            'END:DAYLIGHT',
-            'END:VTIMEZONE'
-        )
-
-        TZ_AEST = (
-            'BEGIN:VTIMEZONE',
-            'TZID:Australia-Sydney',
-            'BEGIN:STANDARD',
-            'DTSTART:19980301T030000',
-            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=04',
-            'TZOFFSETFROM:+1100',
-            'TZOFFSETTO:+1000',
-            'TZNAME:AEST',
-            'END:STANDARD',
-            'BEGIN:DAYLIGHT',
-            'DTSTART:19971029T020000',
-            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=10',
-            'TZOFFSETFROM:+1000',
-            'TZOFFSETTO:+1100',
-            'TZNAME:AEDT',
-            'END:DAYLIGHT',
-            'END:VTIMEZONE'
-        )
-
-        TZ_LON = (
-            'BEGIN:VTIMEZONE',
-            'TZID:Europe-London',
-            'BEGIN:STANDARD',
-            'DTSTART:19810301T030000',
-            'RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10;BYHOUR=02',
-            'TZOFFSETFROM:+0100',
-            'TZOFFSETTO:+0000',
-            'TZNAME:GMT',
-            'END:STANDARD',
-            'BEGIN:DAYLIGHT',
-            'DTSTART:19961001T030000',
-            'RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=03;BYHOUR=01',
-            'TZOFFSETFROM:+0000',
-            'TZOFFSETTO:+0100',
-            'TZNAME:BST',
-            'END:DAYLIGHT',
-            'END:VTIMEZONE'
-        )
-
-        tzname_map = {'Australia/Sydney': TZ_AEST,
-                      'America/Toronto': TZ_EST,
-                      'America/New_York': TZ_EST,
-                      'America/Los_Angeles': TZ_PST,
-                      'Europe/London': TZ_LON}
-
-        return tzname_map[tzname]
-
-    def _gettz_str(self, tzname):
-        return '\n'.join(self._gettz_str_tuple(tzname))
-
-    def _tzstr_dtstart_with_params(self, tzname, param_str):
-        # Adds parameters to the DTSTART values of a given tzstr
-        tz_str_tuple = self._gettz_str_tuple(tzname)
-
-        out_tz = []
-        for line in tz_str_tuple:
-            if line.startswith('DTSTART'):
-                name, value = line.split(':', 1)
-                line = name + ';' + param_str + ':' + value
-
-            out_tz.append(line)
-
-        return '\n'.join(out_tz)
-
-    def gettz(self, tzname):
-        tz_str = self._gettz_str(tzname)
-
-        tzc = tz.tzical(StringIO(tz_str)).get()
-
-        return tzc
-
-    def testRepr(self):
-        instr = StringIO(TZICAL_PST8PDT)
-        instr.name = 'StringIO(PST8PDT)'
-        tzc = tz.tzical(instr)
-
-        self.assertEqual(repr(tzc), "tzical(" + repr(instr.name) + ")")
-
-    # Test performance
-    def _test_us_zone(self, tzc, func, values, start):
-        if start:
-            dt1 = datetime(2003, 3, 9, 1, 59)
-            dt2 = datetime(2003, 3, 9, 2, 00)
-            fold = [0, 0]
-        else:
-            dt1 = datetime(2003, 11, 2, 0, 59)
-            dt2 = datetime(2003, 11, 2, 1, 00)
-            fold = [0, 1]
-
-        dts = (tz.enfold(dt.replace(tzinfo=tzc), fold=f)
-               for dt, f in zip((dt1, dt2), fold))
-
-        for value, dt in zip(values, dts):
-            self.assertEqual(func(dt), value)
-
-    def _test_multi_zones(self, tzstrs, tzids, func, values, start):
-        tzic = tz.tzical(StringIO('\n'.join(tzstrs)))
-        for tzid, vals in zip(tzids, values):
-            tzc = tzic.get(tzid)
-
-            self._test_us_zone(tzc, func, vals, start)
-
-    def _prepare_EST(self):
-        tz_str = self._gettz_str('America/New_York')
-        return tz.tzical(StringIO(tz_str)).get()
-
-    def _testEST(self, start, test_type, tzc=None):
-        if tzc is None:
-            tzc = self._prepare_EST()
-
-        argdict = {
-            'name':   (datetime.tzname, ('EST', 'EDT')),
-            'offset': (datetime.utcoffset, (timedelta(hours=-5),
-                                            timedelta(hours=-4))),
-            'dst':    (datetime.dst, (timedelta(hours=0),
-                                      timedelta(hours=1)))
-        }
-
-        func, values = argdict[test_type]
-
-        if not start:
-            values = reversed(values)
-
-        self._test_us_zone(tzc, func, values, start=start)
-
-    def testESTStartName(self):
-        self._testEST(start=True, test_type='name')
-
-    def testESTEndName(self):
-        self._testEST(start=False, test_type='name')
-
-    def testESTStartOffset(self):
-        self._testEST(start=True, test_type='offset')
-
-    def testESTEndOffset(self):
-        self._testEST(start=False, test_type='offset')
-
-    def testESTStartDST(self):
-        self._testEST(start=True, test_type='dst')
-
-    def testESTEndDST(self):
-        self._testEST(start=False, test_type='dst')
-
-    def testESTValueDatetime(self):
-        # Violating one-test-per-test rule because we're not set up to do
-        # parameterized tests and the manual proliferation is getting a bit
-        # out of hand.
-        tz_str = self._tzstr_dtstart_with_params('America/New_York',
-                                                 'VALUE=DATE-TIME')
-
-        tzc = tz.tzical(StringIO(tz_str)).get()
-
-        for start in (True, False):
-            for test_type in ('name', 'offset', 'dst'):
-                self._testEST(start=start, test_type=test_type, tzc=tzc)
-
-    def _testMultizone(self, start, test_type):
-        tzstrs = (self._gettz_str('America/New_York'),
-                  self._gettz_str('America/Los_Angeles'))
-        tzids = ('US-Eastern', 'US-Pacific')
-
-        argdict = {
-            'name':   (datetime.tzname, (('EST', 'EDT'),
-                                         ('PST', 'PDT'))),
-            'offset': (datetime.utcoffset, ((timedelta(hours=-5),
-                                             timedelta(hours=-4)),
-                                            (timedelta(hours=-8),
-                                             timedelta(hours=-7)))),
-            'dst':    (datetime.dst, ((timedelta(hours=0),
-                                       timedelta(hours=1)),
-                                      (timedelta(hours=0),
-                                       timedelta(hours=1))))
-        }
-
-        func, values = argdict[test_type]
-
-        if not start:
-            values = map(reversed, values)
-
-        self._test_multi_zones(tzstrs, tzids, func, values, start)
-
-    def testMultiZoneStartName(self):
-        self._testMultizone(start=True, test_type='name')
-
-    def testMultiZoneEndName(self):
-        self._testMultizone(start=False, test_type='name')
-
-    def testMultiZoneStartOffset(self):
-        self._testMultizone(start=True, test_type='offset')
-
-    def testMultiZoneEndOffset(self):
-        self._testMultizone(start=False, test_type='offset')
-
-    def testMultiZoneStartDST(self):
-        self._testMultizone(start=True, test_type='dst')
-
-    def testMultiZoneEndDST(self):
-        self._testMultizone(start=False, test_type='dst')
-
-    def testMultiZoneKeys(self):
-        est_str = self._gettz_str('America/New_York')
-        pst_str = self._gettz_str('America/Los_Angeles')
-        tzic = tz.tzical(StringIO('\n'.join((est_str, pst_str))))
-
-        # Sort keys because they are in a random order, being dictionary keys
-        keys = sorted(tzic.keys())
-
-        self.assertEqual(keys, ['US-Eastern', 'US-Pacific'])
-
-    # Test error conditions
-    def testEmptyString(self):
-        with self.assertRaises(ValueError):
-            tz.tzical(StringIO(""))
-
-    def testMultiZoneGet(self):
-        tzic = tz.tzical(StringIO(TZICAL_EST5EDT + TZICAL_PST8PDT))
-
-        with self.assertRaises(ValueError):
-            tzic.get()
-
-    def testDtstartDate(self):
-        tz_str = self._tzstr_dtstart_with_params('America/New_York',
-                                                 'VALUE=DATE')
-        with self.assertRaises(ValueError):
-            tz.tzical(StringIO(tz_str))
-
-    def testDtstartTzid(self):
-        tz_str = self._tzstr_dtstart_with_params('America/New_York',
-                                                 'TZID=UTC')
-        with self.assertRaises(ValueError):
-            tz.tzical(StringIO(tz_str))
-
-    def testDtstartBadParam(self):
-        tz_str = self._tzstr_dtstart_with_params('America/New_York',
-                                                 'FOO=BAR')
-        with self.assertRaises(ValueError):
-            tz.tzical(StringIO(tz_str))
-
-    # Test Parsing
-    def testGap(self):
-        tzic = tz.tzical(StringIO('\n'.join((TZICAL_EST5EDT, TZICAL_PST8PDT))))
-
-        keys = sorted(tzic.keys())
-        self.assertEqual(keys, ['US-Eastern', 'US-Pacific'])
-
-
-class TZTest(unittest.TestCase):
-    def testFileStart1(self):
-        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT)))
-        self.assertEqual(datetime(2003, 4, 6, 1, 59, tzinfo=tzc).tzname(), "EST")
-        self.assertEqual(datetime(2003, 4, 6, 2, 00, tzinfo=tzc).tzname(), "EDT")
-
-    def testFileEnd1(self):
-        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT)))
-        self.assertEqual(datetime(2003, 10, 26, 0, 59, tzinfo=tzc).tzname(),
-                         "EDT")
-        end_est = tz.enfold(datetime(2003, 10, 26, 1, 00, tzinfo=tzc))
-        self.assertEqual(end_est.tzname(), "EST")
-
-    def testFileLastTransition(self):
-        # After the last transition, it goes to standard time in perpetuity
-        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT)))
-        self.assertEqual(datetime(2037, 10, 25, 0, 59, tzinfo=tzc).tzname(),
-                         "EDT")
-
-        last_date = tz.enfold(datetime(2037, 10, 25, 1, 00, tzinfo=tzc), fold=1)
-        self.assertEqual(last_date.tzname(),
-                         "EST")
-
-        self.assertEqual(datetime(2038, 5, 25, 12, 0, tzinfo=tzc).tzname(),
-                         "EST")
-
-    def testInvalidFile(self):
-        # Should throw a ValueError if an invalid file is passed
-        with self.assertRaises(ValueError):
-            tz.tzfile(BytesIO(b'BadFile'))
-
-    def testFilestreamWithNameRepr(self):
-        # If fileobj is a filestream with a "name" attribute this name should
-        # be reflected in the tz object's repr
-        fileobj = BytesIO(base64.b64decode(TZFILE_EST5EDT))
-        fileobj.name = 'foo'
-        tzc = tz.tzfile(fileobj)
-        self.assertEqual(repr(tzc), 'tzfile(' + repr('foo') + ')')
-
-    def testLeapCountDecodesProperly(self):
-        # This timezone has leapcnt, and failed to decode until
-        # Eugene Oden notified about the issue.
-
-        # As leap information is currently unused (and unstored) by tzfile() we
-        # can only indirectly test this: Take advantage of tzfile() not closing
-        # the input file if handed in as an opened file and assert that the
-        # full file content has been read by tzfile(). Note: For this test to
-        # work NEW_YORK must be in TZif version 1 format i.e. no more data
-        # after TZif v1 header + data has been read
-        fileobj = BytesIO(base64.b64decode(NEW_YORK))
-        tz.tzfile(fileobj)
-        # we expect no remaining file content now, i.e. zero-length; if there's
-        # still data we haven't read the file format correctly
-        remaining_tzfile_content = fileobj.read()
-        self.assertEqual(len(remaining_tzfile_content), 0)
-
-    def testIsStd(self):
-        # NEW_YORK tzfile contains this isstd information:
-        isstd_expected = (0, 0, 0, 1)
-        tzc = tz.tzfile(BytesIO(base64.b64decode(NEW_YORK)))
-        # gather the actual information as parsed by the tzfile class
-        isstd = []
-        for ttinfo in tzc._ttinfo_list:
-            # ttinfo objects contain boolean values
-            isstd.append(int(ttinfo.isstd))
-        # ttinfo list may contain more entries than isstd file content
-        isstd = tuple(isstd[:len(isstd_expected)])
-        self.assertEqual(
-            isstd_expected, isstd,
-            "isstd UTC/local indicators parsed: %s != tzfile contents: %s"
-            % (isstd, isstd_expected))
-
-    def testGMTHasNoDaylight(self):
-        # tz.tzstr("GMT+2") improperly considered daylight saving time.
-        # Issue reported by Lennart Regebro.
-        dt = datetime(2007, 8, 6, 4, 10)
-        self.assertEqual(tz.gettz("GMT+2").dst(dt), timedelta(0))
-
-    def testGMTOffset(self):
-        # GMT and UTC offsets have inverted signal when compared to the
-        # usual TZ variable handling.
+@pytest.mark.parametrize('tz_str,expected', [ 
+    # From https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html 
+    ('', tz.tzrange(None)),     # TODO: Should change this so tz.tzrange('') works 
+    ('EST+5EDT,M3.2.0/2,M11.1.0/12', 
+     tz.tzrange('EST', -18000, 'EDT', -14400, 
+        start=relativedelta(month=3, day=1, weekday=SU(2), hours=2), 
+        end=relativedelta(month=11, day=1, weekday=SU(1), hours=11))), 
+    ('WART4WARST,J1/0,J365/25',  # This is DST all year, Western Argentina Summer Time 
+     tz.tzrange('WART', timedelta(hours=-4), 'WARST', 
+        start=relativedelta(month=1, day=1, hours=0), 
+        end=relativedelta(month=12, day=31, days=1))), 
+    ('IST-2IDT,M3.4.4/26,M10.5.0',      # Israel Standard / Daylight Time 
+     tz.tzrange('IST', timedelta(hours=2), 'IDT', 
+        start=relativedelta(month=3, day=1, weekday=TH(4), days=1, hours=2), 
+        end=relativedelta(month=10, day=31, weekday=SU(-1), hours=1))), 
+    ('WGT3WGST,M3.5.0/2,M10.5.0/1', 
+     tz.tzrange('WGT', timedelta(hours=-3), 'WGST', 
+        start=relativedelta(month=3, day=31, weekday=SU(-1), hours=2), 
+        end=relativedelta(month=10, day=31, weekday=SU(-1), hours=0))), 
+ 
+    # Different offset specifications 
+    ('WGT0300WGST', 
+     tz.tzrange('WGT', timedelta(hours=-3), 'WGST')), 
+    ('WGT03:00WGST', 
+     tz.tzrange('WGT', timedelta(hours=-3), 'WGST')), 
+    ('AEST-1100AEDT', 
+     tz.tzrange('AEST', timedelta(hours=11), 'AEDT')), 
+    ('AEST-11:00AEDT', 
+     tz.tzrange('AEST', timedelta(hours=11), 'AEDT')), 
+ 
+    # Different time formats 
+    ('EST5EDT,M3.2.0/4:00,M11.1.0/3:00', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4), 
+        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))), 
+    ('EST5EDT,M3.2.0/04:00,M11.1.0/03:00', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4), 
+        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))), 
+    ('EST5EDT,M3.2.0/0400,M11.1.0/0300', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(month=3, day=1, weekday=SU(2), hours=4), 
+        end=relativedelta(month=11, day=1, weekday=SU(1), hours=2))), 
+]) 
+def test_valid_GNU_tzstr(tz_str, expected): 
+    tzi = tz.tzstr(tz_str) 
+ 
+    assert tzi == expected 
+ 
+ 
+@pytest.mark.tzstr 
+@pytest.mark.parametrize('tz_str, expected', [ 
+    ('EST5EDT,5,4,0,7200,11,3,0,7200', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(month=5, day=1, weekday=SU(+4), hours=+2), 
+        end=relativedelta(month=11, day=1, weekday=SU(+3), hours=+1))), 
+    ('EST5EDT,5,-4,0,7200,11,3,0,7200', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(hours=+2, month=5, day=31, weekday=SU(-4)), 
+        end=relativedelta(hours=+1, month=11, day=1, weekday=SU(+3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200,3600', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200,3600', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200,-3600', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', timedelta(hours=-6), 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=+3, month=11, day=31, weekday=SU(-3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200,+7200', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', timedelta(hours=-3), 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=0, month=11, day=31, weekday=SU(-3)))), 
+    ('EST5EDT,5,4,0,7200,11,-3,0,7200,+3600', 
+     tz.tzrange('EST', timedelta(hours=-5), 'EDT', 
+        start=relativedelta(hours=+2, month=5, day=1, weekday=SU(+4)), 
+        end=relativedelta(hours=+1, month=11, day=31, weekday=SU(-3)))), 
+]) 
+def test_valid_dateutil_format(tz_str, expected): 
+    # This tests the dateutil-specific format that is used widely in the tests 
+    # and examples. It is unclear where this format originated from. 
+    with pytest.warns(tz.DeprecatedTzFormatWarning): 
+        tzi = tz.tzstr.instance(tz_str) 
+ 
+    assert tzi == expected 
+ 
+ 
+@pytest.mark.tzstr 
+@pytest.mark.parametrize('tz_str', [ 
+    'hdfiughdfuig,dfughdfuigpu87ñ::', 
+    ',dfughdfuigpu87ñ::', 
+    '-1:WART4WARST,J1,J365/25', 
+    'WART4WARST,J1,J365/-25', 
+    'IST-2IDT,M3.4.-1/26,M10.5.0', 
+    'IST-2IDT,M3,2000,1/26,M10,5,0' 
+]) 
+def test_invalid_GNU_tzstr(tz_str): 
+    with pytest.raises(ValueError): 
+        tz.tzstr(tz_str) 
+ 
+ 
+# Different representations of the same default rule set 
+DEFAULT_TZSTR_RULES_EQUIV_2003 = [ 
+    'EST5EDT', 
+    'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00', 
+    'EST5EDT4,95/02:00:00,298/02:00', 
+    'EST5EDT4,J96/02:00:00,J299/02:00', 
+    'EST5EDT4,J96/02:00:00,J299/02' 
+] 
+ 
+ 
+@pytest.mark.tzstr 
+@pytest.mark.parametrize('tz_str', DEFAULT_TZSTR_RULES_EQUIV_2003) 
+def test_tzstr_default_start(tz_str): 
+    tzi = tz.tzstr(tz_str) 
+    dt_std = datetime(2003, 4, 6, 1, 59, tzinfo=tzi) 
+    dt_dst = datetime(2003, 4, 6, 2, 00, tzinfo=tzi) 
+ 
+    assert get_timezone_tuple(dt_std) == EST_TUPLE 
+    assert get_timezone_tuple(dt_dst) == EDT_TUPLE 
+ 
+ 
+@pytest.mark.tzstr 
+@pytest.mark.parametrize('tz_str', DEFAULT_TZSTR_RULES_EQUIV_2003) 
+def test_tzstr_default_end(tz_str): 
+    tzi = tz.tzstr(tz_str) 
+    dt_dst = datetime(2003, 10, 26, 0, 59, tzinfo=tzi) 
+    dt_dst_ambig = datetime(2003, 10, 26, 1, 00, tzinfo=tzi) 
+    dt_std_ambig = tz.enfold(dt_dst_ambig, fold=1) 
+    dt_std = datetime(2003, 10, 26, 2, 00, tzinfo=tzi) 
+ 
+    assert get_timezone_tuple(dt_dst) == EDT_TUPLE 
+    assert get_timezone_tuple(dt_dst_ambig) == EDT_TUPLE 
+    assert get_timezone_tuple(dt_std_ambig) == EST_TUPLE 
+    assert get_timezone_tuple(dt_std) == EST_TUPLE 
+ 
+ 
+@pytest.mark.tzstr 
+@pytest.mark.parametrize('tzstr_1', ['EST5EDT', 
+                                     'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00']) 
+@pytest.mark.parametrize('tzstr_2', ['EST5EDT', 
+                                     'EST5EDT4,M4.1.0/02:00:00,M10-5-0/02:00']) 
+def test_tzstr_default_cmp(tzstr_1, tzstr_2): 
+    tz1 = tz.tzstr(tzstr_1) 
+    tz2 = tz.tzstr(tzstr_2) 
+ 
+    assert tz1 == tz2 
+ 
+class TZICalTest(unittest.TestCase, TzFoldMixin): 
+    def _gettz_str_tuple(self, tzname): 
+        TZ_EST = ( 
+            'BEGIN:VTIMEZONE', 
+            'TZID:US-Eastern', 
+            'BEGIN:STANDARD', 
+            'DTSTART:19971029T020000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=11', 
+            'TZOFFSETFROM:-0400', 
+            'TZOFFSETTO:-0500', 
+            'TZNAME:EST', 
+            'END:STANDARD', 
+            'BEGIN:DAYLIGHT', 
+            'DTSTART:19980301T020000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+2SU;BYMONTH=03', 
+            'TZOFFSETFROM:-0500', 
+            'TZOFFSETTO:-0400', 
+            'TZNAME:EDT', 
+            'END:DAYLIGHT', 
+            'END:VTIMEZONE' 
+        ) 
+ 
+        TZ_PST = ( 
+            'BEGIN:VTIMEZONE', 
+            'TZID:US-Pacific', 
+            'BEGIN:STANDARD', 
+            'DTSTART:19971029T020000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=11', 
+            'TZOFFSETFROM:-0700', 
+            'TZOFFSETTO:-0800', 
+            'TZNAME:PST', 
+            'END:STANDARD', 
+            'BEGIN:DAYLIGHT', 
+            'DTSTART:19980301T020000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+2SU;BYMONTH=03', 
+            'TZOFFSETFROM:-0800', 
+            'TZOFFSETTO:-0700', 
+            'TZNAME:PDT', 
+            'END:DAYLIGHT', 
+            'END:VTIMEZONE' 
+        ) 
+ 
+        TZ_AEST = ( 
+            'BEGIN:VTIMEZONE', 
+            'TZID:Australia-Sydney', 
+            'BEGIN:STANDARD', 
+            'DTSTART:19980301T030000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=04', 
+            'TZOFFSETFROM:+1100', 
+            'TZOFFSETTO:+1000', 
+            'TZNAME:AEST', 
+            'END:STANDARD', 
+            'BEGIN:DAYLIGHT', 
+            'DTSTART:19971029T020000', 
+            'RRULE:FREQ=YEARLY;BYDAY=+1SU;BYMONTH=10', 
+            'TZOFFSETFROM:+1000', 
+            'TZOFFSETTO:+1100', 
+            'TZNAME:AEDT', 
+            'END:DAYLIGHT', 
+            'END:VTIMEZONE' 
+        ) 
+ 
+        TZ_LON = ( 
+            'BEGIN:VTIMEZONE', 
+            'TZID:Europe-London', 
+            'BEGIN:STANDARD', 
+            'DTSTART:19810301T030000', 
+            'RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10;BYHOUR=02', 
+            'TZOFFSETFROM:+0100', 
+            'TZOFFSETTO:+0000', 
+            'TZNAME:GMT', 
+            'END:STANDARD', 
+            'BEGIN:DAYLIGHT', 
+            'DTSTART:19961001T030000', 
+            'RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=03;BYHOUR=01', 
+            'TZOFFSETFROM:+0000', 
+            'TZOFFSETTO:+0100', 
+            'TZNAME:BST', 
+            'END:DAYLIGHT', 
+            'END:VTIMEZONE' 
+        ) 
+ 
+        tzname_map = {'Australia/Sydney': TZ_AEST, 
+                      'America/Toronto': TZ_EST, 
+                      'America/New_York': TZ_EST, 
+                      'America/Los_Angeles': TZ_PST, 
+                      'Europe/London': TZ_LON} 
+ 
+        return tzname_map[tzname] 
+ 
+    def _gettz_str(self, tzname): 
+        return '\n'.join(self._gettz_str_tuple(tzname)) 
+ 
+    def _tzstr_dtstart_with_params(self, tzname, param_str): 
+        # Adds parameters to the DTSTART values of a given tzstr 
+        tz_str_tuple = self._gettz_str_tuple(tzname) 
+ 
+        out_tz = [] 
+        for line in tz_str_tuple: 
+            if line.startswith('DTSTART'): 
+                name, value = line.split(':', 1) 
+                line = name + ';' + param_str + ':' + value 
+ 
+            out_tz.append(line) 
+ 
+        return '\n'.join(out_tz) 
+ 
+    def gettz(self, tzname): 
+        tz_str = self._gettz_str(tzname) 
+ 
+        tzc = tz.tzical(StringIO(tz_str)).get() 
+ 
+        return tzc 
+ 
+    def testRepr(self): 
+        instr = StringIO(TZICAL_PST8PDT) 
+        instr.name = 'StringIO(PST8PDT)' 
+        tzc = tz.tzical(instr) 
+ 
+        self.assertEqual(repr(tzc), "tzical(" + repr(instr.name) + ")") 
+ 
+    # Test performance 
+    def _test_us_zone(self, tzc, func, values, start): 
+        if start: 
+            dt1 = datetime(2003, 3, 9, 1, 59) 
+            dt2 = datetime(2003, 3, 9, 2, 00) 
+            fold = [0, 0] 
+        else: 
+            dt1 = datetime(2003, 11, 2, 0, 59) 
+            dt2 = datetime(2003, 11, 2, 1, 00) 
+            fold = [0, 1] 
+ 
+        dts = (tz.enfold(dt.replace(tzinfo=tzc), fold=f) 
+               for dt, f in zip((dt1, dt2), fold)) 
+ 
+        for value, dt in zip(values, dts): 
+            self.assertEqual(func(dt), value) 
+ 
+    def _test_multi_zones(self, tzstrs, tzids, func, values, start): 
+        tzic = tz.tzical(StringIO('\n'.join(tzstrs))) 
+        for tzid, vals in zip(tzids, values): 
+            tzc = tzic.get(tzid) 
+ 
+            self._test_us_zone(tzc, func, vals, start) 
+ 
+    def _prepare_EST(self): 
+        tz_str = self._gettz_str('America/New_York') 
+        return tz.tzical(StringIO(tz_str)).get() 
+ 
+    def _testEST(self, start, test_type, tzc=None): 
+        if tzc is None: 
+            tzc = self._prepare_EST() 
+ 
+        argdict = { 
+            'name':   (datetime.tzname, ('EST', 'EDT')), 
+            'offset': (datetime.utcoffset, (timedelta(hours=-5), 
+                                            timedelta(hours=-4))), 
+            'dst':    (datetime.dst, (timedelta(hours=0), 
+                                      timedelta(hours=1))) 
+        } 
+ 
+        func, values = argdict[test_type] 
+ 
+        if not start: 
+            values = reversed(values) 
+ 
+        self._test_us_zone(tzc, func, values, start=start) 
+ 
+    def testESTStartName(self): 
+        self._testEST(start=True, test_type='name') 
+ 
+    def testESTEndName(self): 
+        self._testEST(start=False, test_type='name') 
+ 
+    def testESTStartOffset(self): 
+        self._testEST(start=True, test_type='offset') 
+ 
+    def testESTEndOffset(self): 
+        self._testEST(start=False, test_type='offset') 
+ 
+    def testESTStartDST(self): 
+        self._testEST(start=True, test_type='dst') 
+ 
+    def testESTEndDST(self): 
+        self._testEST(start=False, test_type='dst') 
+ 
+    def testESTValueDatetime(self): 
+        # Violating one-test-per-test rule because we're not set up to do 
+        # parameterized tests and the manual proliferation is getting a bit 
+        # out of hand. 
+        tz_str = self._tzstr_dtstart_with_params('America/New_York', 
+                                                 'VALUE=DATE-TIME') 
+ 
+        tzc = tz.tzical(StringIO(tz_str)).get() 
+ 
+        for start in (True, False): 
+            for test_type in ('name', 'offset', 'dst'): 
+                self._testEST(start=start, test_type=test_type, tzc=tzc) 
+ 
+    def _testMultizone(self, start, test_type): 
+        tzstrs = (self._gettz_str('America/New_York'), 
+                  self._gettz_str('America/Los_Angeles')) 
+        tzids = ('US-Eastern', 'US-Pacific') 
+ 
+        argdict = { 
+            'name':   (datetime.tzname, (('EST', 'EDT'), 
+                                         ('PST', 'PDT'))), 
+            'offset': (datetime.utcoffset, ((timedelta(hours=-5), 
+                                             timedelta(hours=-4)), 
+                                            (timedelta(hours=-8), 
+                                             timedelta(hours=-7)))), 
+            'dst':    (datetime.dst, ((timedelta(hours=0), 
+                                       timedelta(hours=1)), 
+                                      (timedelta(hours=0), 
+                                       timedelta(hours=1)))) 
+        } 
+ 
+        func, values = argdict[test_type] 
+ 
+        if not start: 
+            values = map(reversed, values) 
+ 
+        self._test_multi_zones(tzstrs, tzids, func, values, start) 
+ 
+    def testMultiZoneStartName(self): 
+        self._testMultizone(start=True, test_type='name') 
+ 
+    def testMultiZoneEndName(self): 
+        self._testMultizone(start=False, test_type='name') 
+ 
+    def testMultiZoneStartOffset(self): 
+        self._testMultizone(start=True, test_type='offset') 
+ 
+    def testMultiZoneEndOffset(self): 
+        self._testMultizone(start=False, test_type='offset') 
+ 
+    def testMultiZoneStartDST(self): 
+        self._testMultizone(start=True, test_type='dst') 
+ 
+    def testMultiZoneEndDST(self): 
+        self._testMultizone(start=False, test_type='dst') 
+ 
+    def testMultiZoneKeys(self): 
+        est_str = self._gettz_str('America/New_York') 
+        pst_str = self._gettz_str('America/Los_Angeles') 
+        tzic = tz.tzical(StringIO('\n'.join((est_str, pst_str)))) 
+ 
+        # Sort keys because they are in a random order, being dictionary keys 
+        keys = sorted(tzic.keys()) 
+ 
+        self.assertEqual(keys, ['US-Eastern', 'US-Pacific']) 
+ 
+    # Test error conditions 
+    def testEmptyString(self): 
+        with self.assertRaises(ValueError): 
+            tz.tzical(StringIO("")) 
+ 
+    def testMultiZoneGet(self): 
+        tzic = tz.tzical(StringIO(TZICAL_EST5EDT + TZICAL_PST8PDT)) 
+ 
+        with self.assertRaises(ValueError): 
+            tzic.get() 
+ 
+    def testDtstartDate(self): 
+        tz_str = self._tzstr_dtstart_with_params('America/New_York', 
+                                                 'VALUE=DATE') 
+        with self.assertRaises(ValueError): 
+            tz.tzical(StringIO(tz_str)) 
+ 
+    def testDtstartTzid(self): 
+        tz_str = self._tzstr_dtstart_with_params('America/New_York', 
+                                                 'TZID=UTC') 
+        with self.assertRaises(ValueError): 
+            tz.tzical(StringIO(tz_str)) 
+ 
+    def testDtstartBadParam(self): 
+        tz_str = self._tzstr_dtstart_with_params('America/New_York', 
+                                                 'FOO=BAR') 
+        with self.assertRaises(ValueError): 
+            tz.tzical(StringIO(tz_str)) 
+ 
+    # Test Parsing 
+    def testGap(self): 
+        tzic = tz.tzical(StringIO('\n'.join((TZICAL_EST5EDT, TZICAL_PST8PDT)))) 
+ 
+        keys = sorted(tzic.keys()) 
+        self.assertEqual(keys, ['US-Eastern', 'US-Pacific']) 
+ 
+ 
+class TZTest(unittest.TestCase): 
+    def testFileStart1(self): 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT))) 
+        self.assertEqual(datetime(2003, 4, 6, 1, 59, tzinfo=tzc).tzname(), "EST") 
+        self.assertEqual(datetime(2003, 4, 6, 2, 00, tzinfo=tzc).tzname(), "EDT") 
+ 
+    def testFileEnd1(self): 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT))) 
+        self.assertEqual(datetime(2003, 10, 26, 0, 59, tzinfo=tzc).tzname(), 
+                         "EDT") 
+        end_est = tz.enfold(datetime(2003, 10, 26, 1, 00, tzinfo=tzc)) 
+        self.assertEqual(end_est.tzname(), "EST") 
+ 
+    def testFileLastTransition(self): 
+        # After the last transition, it goes to standard time in perpetuity 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT))) 
+        self.assertEqual(datetime(2037, 10, 25, 0, 59, tzinfo=tzc).tzname(), 
+                         "EDT") 
+ 
+        last_date = tz.enfold(datetime(2037, 10, 25, 1, 00, tzinfo=tzc), fold=1) 
+        self.assertEqual(last_date.tzname(), 
+                         "EST") 
+ 
+        self.assertEqual(datetime(2038, 5, 25, 12, 0, tzinfo=tzc).tzname(), 
+                         "EST") 
+ 
+    def testInvalidFile(self): 
+        # Should throw a ValueError if an invalid file is passed 
+        with self.assertRaises(ValueError): 
+            tz.tzfile(BytesIO(b'BadFile')) 
+ 
+    def testFilestreamWithNameRepr(self): 
+        # If fileobj is a filestream with a "name" attribute this name should 
+        # be reflected in the tz object's repr 
+        fileobj = BytesIO(base64.b64decode(TZFILE_EST5EDT)) 
+        fileobj.name = 'foo' 
+        tzc = tz.tzfile(fileobj) 
+        self.assertEqual(repr(tzc), 'tzfile(' + repr('foo') + ')') 
+ 
+    def testLeapCountDecodesProperly(self): 
+        # This timezone has leapcnt, and failed to decode until 
+        # Eugene Oden notified about the issue. 
+ 
+        # As leap information is currently unused (and unstored) by tzfile() we 
+        # can only indirectly test this: Take advantage of tzfile() not closing 
+        # the input file if handed in as an opened file and assert that the 
+        # full file content has been read by tzfile(). Note: For this test to 
+        # work NEW_YORK must be in TZif version 1 format i.e. no more data 
+        # after TZif v1 header + data has been read 
+        fileobj = BytesIO(base64.b64decode(NEW_YORK)) 
+        tz.tzfile(fileobj) 
+        # we expect no remaining file content now, i.e. zero-length; if there's 
+        # still data we haven't read the file format correctly 
+        remaining_tzfile_content = fileobj.read() 
+        self.assertEqual(len(remaining_tzfile_content), 0) 
+ 
+    def testIsStd(self): 
+        # NEW_YORK tzfile contains this isstd information: 
+        isstd_expected = (0, 0, 0, 1) 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(NEW_YORK))) 
+        # gather the actual information as parsed by the tzfile class 
+        isstd = [] 
+        for ttinfo in tzc._ttinfo_list: 
+            # ttinfo objects contain boolean values 
+            isstd.append(int(ttinfo.isstd)) 
+        # ttinfo list may contain more entries than isstd file content 
+        isstd = tuple(isstd[:len(isstd_expected)]) 
+        self.assertEqual( 
+            isstd_expected, isstd, 
+            "isstd UTC/local indicators parsed: %s != tzfile contents: %s" 
+            % (isstd, isstd_expected)) 
+ 
+    def testGMTHasNoDaylight(self): 
+        # tz.tzstr("GMT+2") improperly considered daylight saving time. 
+        # Issue reported by Lennart Regebro. 
+        dt = datetime(2007, 8, 6, 4, 10) 
+        self.assertEqual(tz.gettz("GMT+2").dst(dt), timedelta(0)) 
+ 
+    def testGMTOffset(self): 
+        # GMT and UTC offsets have inverted signal when compared to the 
+        # usual TZ variable handling. 
         dt = datetime(2007, 8, 6, 4, 10, tzinfo=tz.UTC)
-        self.assertEqual(dt.astimezone(tz=tz.tzstr("GMT+2")),
-                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2")))
-        self.assertEqual(dt.astimezone(tz=tz.gettz("UTC-2")),
-                          datetime(2007, 8, 6, 2, 10, tzinfo=tz.tzstr("UTC-2")))
-
+        self.assertEqual(dt.astimezone(tz=tz.tzstr("GMT+2")), 
+                          datetime(2007, 8, 6, 6, 10, tzinfo=tz.tzstr("GMT+2"))) 
+        self.assertEqual(dt.astimezone(tz=tz.gettz("UTC-2")), 
+                          datetime(2007, 8, 6, 2, 10, tzinfo=tz.tzstr("UTC-2"))) 
+ 
     @unittest.skipIf(IS_WIN, "requires Unix")
-    def testTZSetDoesntCorrupt(self):
-        # if we start in non-UTC then tzset UTC make sure parse doesn't get
-        # confused
-        with TZEnvContext('UTC'):
-            # this should parse to UTC timezone not the original timezone
-            dt = parse('2014-07-20T12:34:56+00:00')
-            self.assertEqual(str(dt), '2014-07-20 12:34:56+00:00')
-
-
+    def testTZSetDoesntCorrupt(self): 
+        # if we start in non-UTC then tzset UTC make sure parse doesn't get 
+        # confused 
+        with TZEnvContext('UTC'): 
+            # this should parse to UTC timezone not the original timezone 
+            dt = parse('2014-07-20T12:34:56+00:00') 
+            self.assertEqual(str(dt), '2014-07-20 12:34:56+00:00') 
+ 
+ 
 @pytest.mark.tzfile
 @pytest.mark.skipif(not SUPPORTS_SUB_MINUTE_OFFSETS,
                     reason='Sub-minute offsets not supported')
@@ -2119,570 +2119,570 @@ def test_samoa_transition():
 
 
 @unittest.skipUnless(IS_WIN, "Requires Windows")
-class TzWinTest(unittest.TestCase, TzWinFoldMixin):
-    def setUp(self):
-        self.tzclass = tzwin.tzwin
-
-    def testTzResLoadName(self):
-        # This may not work right on non-US locales.
-        tzr = tzwin.tzres()
-        self.assertEqual(tzr.load_name(112), "Eastern Standard Time")
-
-    def testTzResNameFromString(self):
-        tzr = tzwin.tzres()
-        self.assertEqual(tzr.name_from_string('@tzres.dll,-221'),
-                         'Alaskan Daylight Time')
-
-        self.assertEqual(tzr.name_from_string('Samoa Daylight Time'),
-                         'Samoa Daylight Time')
-
-        with self.assertRaises(ValueError):
-            tzr.name_from_string('@tzres.dll,100')
-
-    def testIsdstZoneWithNoDaylightSaving(self):
-        tz = tzwin.tzwin("UTC")
-        dt = parse("2013-03-06 19:08:15")
-        self.assertFalse(tz._isdst(dt))
-
-    def testOffset(self):
-        tz = tzwin.tzwin("Cape Verde Standard Time")
-        self.assertEqual(tz.utcoffset(datetime(1995, 5, 21, 12, 9, 13)),
-                         timedelta(-1, 82800))
-
-    def testTzwinName(self):
-        # https://github.com/dateutil/dateutil/issues/143
-        tw = tz.tzwin('Eastern Standard Time')
-
-        # Cover the transitions for at least two years.
-        ESTs = 'Eastern Standard Time'
-        EDTs = 'Eastern Daylight Time'
-        transition_dates = [(datetime(2015, 3, 8, 0, 59), ESTs),
-                            (datetime(2015, 3, 8, 3, 1), EDTs),
-                            (datetime(2015, 11, 1, 0, 59), EDTs),
-                            (datetime(2015, 11, 1, 3, 1), ESTs),
-                            (datetime(2016, 3, 13, 0, 59), ESTs),
-                            (datetime(2016, 3, 13, 3, 1), EDTs),
-                            (datetime(2016, 11, 6, 0, 59), EDTs),
-                            (datetime(2016, 11, 6, 3, 1), ESTs)]
-
-        for t_date, expected in transition_dates:
-            self.assertEqual(t_date.replace(tzinfo=tw).tzname(), expected)
-
-    def testTzwinRepr(self):
-        tw = tz.tzwin('Yakutsk Standard Time')
-        self.assertEqual(repr(tw), 'tzwin(' +
-                                   repr('Yakutsk Standard Time') + ')')
-
-    def testTzWinEquality(self):
-        # https://github.com/dateutil/dateutil/issues/151
-        tzwin_names = ('Eastern Standard Time',
-                       'West Pacific Standard Time',
-                       'Yakutsk Standard Time',
-                       'Iran Standard Time',
-                       'UTC')
-
-        for tzwin_name in tzwin_names:
-            # Get two different instances to compare
-            tw1 = tz.tzwin(tzwin_name)
-            tw2 = tz.tzwin(tzwin_name)
-
-            self.assertEqual(tw1, tw2)
-
-    def testTzWinInequality(self):
-        # https://github.com/dateutil/dateutil/issues/151
-        # Note these last two currently differ only in their name.
-        tzwin_names = (('Eastern Standard Time', 'Yakutsk Standard Time'),
-                       ('Greenwich Standard Time', 'GMT Standard Time'),
-                       ('GMT Standard Time', 'UTC'),
-                       ('E. South America Standard Time',
-                        'Argentina Standard Time'))
-
-        for tzwn1, tzwn2 in tzwin_names:
-            # Get two different instances to compare
-            tw1 = tz.tzwin(tzwn1)
-            tw2 = tz.tzwin(tzwn2)
-
-            self.assertNotEqual(tw1, tw2)
-
-    def testTzWinEqualityInvalid(self):
-        # Compare to objects that do not implement comparison with this
-        # (should default to False)
+class TzWinTest(unittest.TestCase, TzWinFoldMixin): 
+    def setUp(self): 
+        self.tzclass = tzwin.tzwin 
+ 
+    def testTzResLoadName(self): 
+        # This may not work right on non-US locales. 
+        tzr = tzwin.tzres() 
+        self.assertEqual(tzr.load_name(112), "Eastern Standard Time") 
+ 
+    def testTzResNameFromString(self): 
+        tzr = tzwin.tzres() 
+        self.assertEqual(tzr.name_from_string('@tzres.dll,-221'), 
+                         'Alaskan Daylight Time') 
+ 
+        self.assertEqual(tzr.name_from_string('Samoa Daylight Time'), 
+                         'Samoa Daylight Time') 
+ 
+        with self.assertRaises(ValueError): 
+            tzr.name_from_string('@tzres.dll,100') 
+ 
+    def testIsdstZoneWithNoDaylightSaving(self): 
+        tz = tzwin.tzwin("UTC") 
+        dt = parse("2013-03-06 19:08:15") 
+        self.assertFalse(tz._isdst(dt)) 
+ 
+    def testOffset(self): 
+        tz = tzwin.tzwin("Cape Verde Standard Time") 
+        self.assertEqual(tz.utcoffset(datetime(1995, 5, 21, 12, 9, 13)), 
+                         timedelta(-1, 82800)) 
+ 
+    def testTzwinName(self): 
+        # https://github.com/dateutil/dateutil/issues/143 
+        tw = tz.tzwin('Eastern Standard Time') 
+ 
+        # Cover the transitions for at least two years. 
+        ESTs = 'Eastern Standard Time' 
+        EDTs = 'Eastern Daylight Time' 
+        transition_dates = [(datetime(2015, 3, 8, 0, 59), ESTs), 
+                            (datetime(2015, 3, 8, 3, 1), EDTs), 
+                            (datetime(2015, 11, 1, 0, 59), EDTs), 
+                            (datetime(2015, 11, 1, 3, 1), ESTs), 
+                            (datetime(2016, 3, 13, 0, 59), ESTs), 
+                            (datetime(2016, 3, 13, 3, 1), EDTs), 
+                            (datetime(2016, 11, 6, 0, 59), EDTs), 
+                            (datetime(2016, 11, 6, 3, 1), ESTs)] 
+ 
+        for t_date, expected in transition_dates: 
+            self.assertEqual(t_date.replace(tzinfo=tw).tzname(), expected) 
+ 
+    def testTzwinRepr(self): 
+        tw = tz.tzwin('Yakutsk Standard Time') 
+        self.assertEqual(repr(tw), 'tzwin(' + 
+                                   repr('Yakutsk Standard Time') + ')') 
+ 
+    def testTzWinEquality(self): 
+        # https://github.com/dateutil/dateutil/issues/151 
+        tzwin_names = ('Eastern Standard Time', 
+                       'West Pacific Standard Time', 
+                       'Yakutsk Standard Time', 
+                       'Iran Standard Time', 
+                       'UTC') 
+ 
+        for tzwin_name in tzwin_names: 
+            # Get two different instances to compare 
+            tw1 = tz.tzwin(tzwin_name) 
+            tw2 = tz.tzwin(tzwin_name) 
+ 
+            self.assertEqual(tw1, tw2) 
+ 
+    def testTzWinInequality(self): 
+        # https://github.com/dateutil/dateutil/issues/151 
+        # Note these last two currently differ only in their name. 
+        tzwin_names = (('Eastern Standard Time', 'Yakutsk Standard Time'), 
+                       ('Greenwich Standard Time', 'GMT Standard Time'), 
+                       ('GMT Standard Time', 'UTC'), 
+                       ('E. South America Standard Time', 
+                        'Argentina Standard Time')) 
+ 
+        for tzwn1, tzwn2 in tzwin_names: 
+            # Get two different instances to compare 
+            tw1 = tz.tzwin(tzwn1) 
+            tw2 = tz.tzwin(tzwn2) 
+ 
+            self.assertNotEqual(tw1, tw2) 
+ 
+    def testTzWinEqualityInvalid(self): 
+        # Compare to objects that do not implement comparison with this 
+        # (should default to False) 
         UTC = tz.UTC
-        EST = tz.tzwin('Eastern Standard Time')
-
-        self.assertFalse(EST == UTC)
-        self.assertFalse(EST == 1)
-        self.assertFalse(UTC == EST)
-
-        self.assertTrue(EST != UTC)
-        self.assertTrue(EST != 1)
-
-    def testTzWinInequalityUnsupported(self):
-        # Compare it to an object that is promiscuous about equality, but for
-        # which tzwin does not implement an equality operator.
-        EST = tz.tzwin('Eastern Standard Time')
-        self.assertTrue(EST == ComparesEqual)
-        self.assertFalse(EST != ComparesEqual)
-
-    def testTzwinTimeOnlyDST(self):
-        # For zones with DST, .dst() should return None
-        tw_est = tz.tzwin('Eastern Standard Time')
-        self.assertIs(dt_time(14, 10, tzinfo=tw_est).dst(), None)
-
-        # This zone has no DST, so .dst() can return 0
-        tw_sast = tz.tzwin('South Africa Standard Time')
-        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).dst(),
-                         timedelta(0))
-
-    def testTzwinTimeOnlyUTCOffset(self):
-        # For zones with DST, .utcoffset() should return None
-        tw_est = tz.tzwin('Eastern Standard Time')
-        self.assertIs(dt_time(14, 10, tzinfo=tw_est).utcoffset(), None)
-
-        # This zone has no DST, so .utcoffset() returns standard offset
-        tw_sast = tz.tzwin('South Africa Standard Time')
-        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).utcoffset(),
-                         timedelta(hours=2))
-
-    def testTzwinTimeOnlyTZName(self):
-        # For zones with DST, the name defaults to standard time
-        tw_est = tz.tzwin('Eastern Standard Time')
-        self.assertEqual(dt_time(14, 10, tzinfo=tw_est).tzname(),
-                         'Eastern Standard Time')
-
-        # For zones with no DST, this should work normally.
-        tw_sast = tz.tzwin('South Africa Standard Time')
-        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).tzname(),
-                         'South Africa Standard Time')
-
-
+        EST = tz.tzwin('Eastern Standard Time') 
+ 
+        self.assertFalse(EST == UTC) 
+        self.assertFalse(EST == 1) 
+        self.assertFalse(UTC == EST) 
+ 
+        self.assertTrue(EST != UTC) 
+        self.assertTrue(EST != 1) 
+ 
+    def testTzWinInequalityUnsupported(self): 
+        # Compare it to an object that is promiscuous about equality, but for 
+        # which tzwin does not implement an equality operator. 
+        EST = tz.tzwin('Eastern Standard Time') 
+        self.assertTrue(EST == ComparesEqual) 
+        self.assertFalse(EST != ComparesEqual) 
+ 
+    def testTzwinTimeOnlyDST(self): 
+        # For zones with DST, .dst() should return None 
+        tw_est = tz.tzwin('Eastern Standard Time') 
+        self.assertIs(dt_time(14, 10, tzinfo=tw_est).dst(), None) 
+ 
+        # This zone has no DST, so .dst() can return 0 
+        tw_sast = tz.tzwin('South Africa Standard Time') 
+        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).dst(), 
+                         timedelta(0)) 
+ 
+    def testTzwinTimeOnlyUTCOffset(self): 
+        # For zones with DST, .utcoffset() should return None 
+        tw_est = tz.tzwin('Eastern Standard Time') 
+        self.assertIs(dt_time(14, 10, tzinfo=tw_est).utcoffset(), None) 
+ 
+        # This zone has no DST, so .utcoffset() returns standard offset 
+        tw_sast = tz.tzwin('South Africa Standard Time') 
+        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).utcoffset(), 
+                         timedelta(hours=2)) 
+ 
+    def testTzwinTimeOnlyTZName(self): 
+        # For zones with DST, the name defaults to standard time 
+        tw_est = tz.tzwin('Eastern Standard Time') 
+        self.assertEqual(dt_time(14, 10, tzinfo=tw_est).tzname(), 
+                         'Eastern Standard Time') 
+ 
+        # For zones with no DST, this should work normally. 
+        tw_sast = tz.tzwin('South Africa Standard Time') 
+        self.assertEqual(dt_time(14, 10, tzinfo=tw_sast).tzname(), 
+                         'South Africa Standard Time') 
+ 
+ 
 @unittest.skipUnless(IS_WIN, "Requires Windows")
-class TzWinLocalTest(unittest.TestCase, TzWinFoldMixin):
-
-    def setUp(self):
-        self.tzclass = tzwin.tzwinlocal
-        self.context = TZWinContext
-
-    def get_args(self, tzname):
-        return ()
-
-    def testLocal(self):
-        # Not sure how to pin a local time zone, so for now we're just going
-        # to run this and make sure it doesn't raise an error
+class TzWinLocalTest(unittest.TestCase, TzWinFoldMixin): 
+ 
+    def setUp(self): 
+        self.tzclass = tzwin.tzwinlocal 
+        self.context = TZWinContext 
+ 
+    def get_args(self, tzname): 
+        return () 
+ 
+    def testLocal(self): 
+        # Not sure how to pin a local time zone, so for now we're just going 
+        # to run this and make sure it doesn't raise an error 
         # See GitHub Issue #135: https://github.com/dateutil/dateutil/issues/135
-        datetime.now(tzwin.tzwinlocal())
-
-    def testTzwinLocalUTCOffset(self):
-        with TZWinContext('Eastern Standard Time'):
-            tzwl = tzwin.tzwinlocal()
-            self.assertEqual(datetime(2014, 3, 11, tzinfo=tzwl).utcoffset(),
-                             timedelta(hours=-4))
-
-    def testTzwinLocalName(self):
-        # https://github.com/dateutil/dateutil/issues/143
-        ESTs = 'Eastern Standard Time'
-        EDTs = 'Eastern Daylight Time'
-        transition_dates = [(datetime(2015, 3, 8, 0, 59), ESTs),
-                            (datetime(2015, 3, 8, 3, 1), EDTs),
-                            (datetime(2015, 11, 1, 0, 59), EDTs),
-                            (datetime(2015, 11, 1, 3, 1), ESTs),
-                            (datetime(2016, 3, 13, 0, 59), ESTs),
-                            (datetime(2016, 3, 13, 3, 1), EDTs),
-                            (datetime(2016, 11, 6, 0, 59), EDTs),
-                            (datetime(2016, 11, 6, 3, 1), ESTs)]
-
-        with TZWinContext('Eastern Standard Time'):
-            tw = tz.tzwinlocal()
-
-            for t_date, expected in transition_dates:
-                self.assertEqual(t_date.replace(tzinfo=tw).tzname(), expected)
-
-    def testTzWinLocalRepr(self):
-        tw = tz.tzwinlocal()
-        self.assertEqual(repr(tw), 'tzwinlocal()')
-
-    def testTzwinLocalRepr(self):
-        # https://github.com/dateutil/dateutil/issues/143
-        with TZWinContext('Eastern Standard Time'):
-            tw = tz.tzwinlocal()
-
-            self.assertEqual(str(tw), 'tzwinlocal(' +
-                                      repr('Eastern Standard Time') + ')')
-
-        with TZWinContext('Pacific Standard Time'):
-            tw = tz.tzwinlocal()
-
-            self.assertEqual(str(tw), 'tzwinlocal(' +
-                                      repr('Pacific Standard Time') + ')')
-
-    def testTzwinLocalEquality(self):
-        tw_est = tz.tzwin('Eastern Standard Time')
-        tw_pst = tz.tzwin('Pacific Standard Time')
-
-        with TZWinContext('Eastern Standard Time'):
-            twl1 = tz.tzwinlocal()
-            twl2 = tz.tzwinlocal()
-
-            self.assertEqual(twl1, twl2)
-            self.assertEqual(twl1, tw_est)
-            self.assertNotEqual(twl1, tw_pst)
-
-        with TZWinContext('Pacific Standard Time'):
-            twl1 = tz.tzwinlocal()
-            twl2 = tz.tzwinlocal()
-            tw = tz.tzwin('Pacific Standard Time')
-
-            self.assertEqual(twl1, twl2)
-            self.assertEqual(twl1, tw)
-            self.assertEqual(twl1, tw_pst)
-            self.assertNotEqual(twl1, tw_est)
-
-    def testTzwinLocalTimeOnlyDST(self):
-        # For zones with DST, .dst() should return None
-        with TZWinContext('Eastern Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertIs(dt_time(14, 10, tzinfo=twl).dst(), None)
-
-        # This zone has no DST, so .dst() can return 0
-        with TZWinContext('South Africa Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertEqual(dt_time(14, 10, tzinfo=twl).dst(), timedelta(0))
-
-    def testTzwinLocalTimeOnlyUTCOffset(self):
-        # For zones with DST, .utcoffset() should return None
-        with TZWinContext('Eastern Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertIs(dt_time(14, 10, tzinfo=twl).utcoffset(), None)
-
-        # This zone has no DST, so .utcoffset() returns standard offset
-        with TZWinContext('South Africa Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertEqual(dt_time(14, 10, tzinfo=twl).utcoffset(),
-                             timedelta(hours=2))
-
-    def testTzwinLocalTimeOnlyTZName(self):
-        # For zones with DST, the name defaults to standard time
-        with TZWinContext('Eastern Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertEqual(dt_time(14, 10, tzinfo=twl).tzname(),
-                             'Eastern Standard Time')
-
-        # For zones with no DST, this should work normally.
-        with TZWinContext('South Africa Standard Time'):
-            twl = tz.tzwinlocal()
-            self.assertEqual(dt_time(14, 10, tzinfo=twl).tzname(),
-                             'South Africa Standard Time')
-
-
-class TzPickleTest(PicklableMixin, unittest.TestCase):
-    _asfile = False
-
-    def setUp(self):
-        self.assertPicklable = partial(self.assertPicklable,
-                                       asfile=self._asfile)
-
-    def testPickleTzUTC(self):
-        self.assertPicklable(tz.tzutc(), singleton=True)
-
-    def testPickleTzOffsetZero(self):
-        self.assertPicklable(tz.tzoffset('UTC', 0), singleton=True)
-
-    def testPickleTzOffsetPos(self):
-        self.assertPicklable(tz.tzoffset('UTC+1', 3600), singleton=True)
-
-    def testPickleTzOffsetNeg(self):
-        self.assertPicklable(tz.tzoffset('UTC-1', -3600), singleton=True)
-
-    @pytest.mark.tzlocal
-    def testPickleTzLocal(self):
-        self.assertPicklable(tz.tzlocal())
-
-    def testPickleTzFileEST5EDT(self):
-        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT)))
-        self.assertPicklable(tzc)
-
-    def testPickleTzFileEurope_Helsinki(self):
-        tzc = tz.tzfile(BytesIO(base64.b64decode(EUROPE_HELSINKI)))
-        self.assertPicklable(tzc)
-
-    def testPickleTzFileNew_York(self):
-        tzc = tz.tzfile(BytesIO(base64.b64decode(NEW_YORK)))
-        self.assertPicklable(tzc)
-
-    @unittest.skip("Known failure")
-    def testPickleTzICal(self):
-        tzc = tz.tzical(StringIO(TZICAL_EST5EDT)).get()
-        self.assertPicklable(tzc)
-
-    def testPickleTzGettz(self):
-        self.assertPicklable(tz.gettz('America/New_York'))
-
-    def testPickleZoneFileGettz(self):
-        zoneinfo_file = zoneinfo.get_zonefile_instance()
-        tzi = zoneinfo_file.get('America/New_York')
-        self.assertIsNot(tzi, None)
-        self.assertPicklable(tzi)
-
-
-class TzPickleFileTest(TzPickleTest):
-    """ Run all the TzPickleTest tests, using a temporary file """
-    _asfile = True
-
-
-class DatetimeAmbiguousTest(unittest.TestCase):
-    """ Test the datetime_exists / datetime_ambiguous functions """
-
-    def testNoTzSpecified(self):
-        with self.assertRaises(ValueError):
-            tz.datetime_ambiguous(datetime(2016, 4, 1, 2, 9))
-
-    def _get_no_support_tzinfo_class(self, dt_start, dt_end, dst_only=False):
-        # Generates a class of tzinfo with no support for is_ambiguous
-        # where dates between dt_start and dt_end are ambiguous.
-
-        class FoldingTzInfo(tzinfo):
-            def utcoffset(self, dt):
-                if not dst_only:
-                    dt_n = dt.replace(tzinfo=None)
-
-                    if dt_start <= dt_n < dt_end and getattr(dt_n, 'fold', 0):
-                        return timedelta(hours=-1)
-
-                return timedelta(hours=0)
-
-            def dst(self, dt):
-                dt_n = dt.replace(tzinfo=None)
-
-                if dt_start <= dt_n < dt_end and getattr(dt_n, 'fold', 0):
-                    return timedelta(hours=1)
-                else:
-                    return timedelta(0)
-
-        return FoldingTzInfo
-
-    def _get_no_support_tzinfo(self, dt_start, dt_end, dst_only=False):
-        return self._get_no_support_tzinfo_class(dt_start, dt_end, dst_only)()
-
-    def testNoSupportAmbiguityFoldNaive(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30),
-                                              tz=tzi))
-
-    def testNoSupportAmbiguityFoldAware(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30,
-                                                       tzinfo=tzi)))
-
-    def testNoSupportAmbiguityUnambiguousNaive(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30),
-                                              tz=tzi))
-
-    def testNoSupportAmbiguityUnambiguousAware(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30,
-                                                        tzinfo=tzi)))
-
-    def testNoSupportAmbiguityFoldDSTOnly(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end, dst_only=True)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30),
-                                              tz=tzi))
-
-    def testNoSupportAmbiguityUnambiguousDSTOnly(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_no_support_tzinfo(dt_start, dt_end, dst_only=True)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30),
-                                               tz=tzi))
-
-    def testSupportAmbiguityFoldNaive(self):
-        tzi = tz.gettz('US/Eastern')
-
-        dt = datetime(2011, 11, 6, 1, 30)
-
-        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi))
-
-    def testSupportAmbiguityFoldAware(self):
-        tzi = tz.gettz('US/Eastern')
-
-        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tzi)
-
-        self.assertTrue(tz.datetime_ambiguous(dt))
-
-    def testSupportAmbiguityUnambiguousAware(self):
-        tzi = tz.gettz('US/Eastern')
-
-        dt = datetime(2011, 11, 6, 4, 30)
-
-        self.assertFalse(tz.datetime_ambiguous(dt, tz=tzi))
-
-    def testSupportAmbiguityUnambiguousNaive(self):
-        tzi = tz.gettz('US/Eastern')
-
-        dt = datetime(2011, 11, 6, 4, 30, tzinfo=tzi)
-
-        self.assertFalse(tz.datetime_ambiguous(dt))
-
-    def _get_ambig_error_tzinfo(self, dt_start, dt_end, dst_only=False):
-        cTzInfo = self._get_no_support_tzinfo_class(dt_start, dt_end, dst_only)
-
-        # Takes the wrong number of arguments and raises an error anyway.
-        class FoldTzInfoRaises(cTzInfo):
-            def is_ambiguous(self, dt, other_arg):
-                raise NotImplementedError('This is not implemented')
-
-        return FoldTzInfoRaises()
-
-    def testIncompatibleAmbiguityFoldNaive(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30),
-                                              tz=tzi))
-
-    def testIncompatibleAmbiguityFoldAware(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30,
-                                                       tzinfo=tzi)))
-
-    def testIncompatibleAmbiguityUnambiguousNaive(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30),
-                                              tz=tzi))
-
-    def testIncompatibleAmbiguityUnambiguousAware(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30,
-                                                        tzinfo=tzi)))
-
-    def testIncompatibleAmbiguityFoldDSTOnly(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end, dst_only=True)
-
-        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30),
-                                              tz=tzi))
-
-    def testIncompatibleAmbiguityUnambiguousDSTOnly(self):
-        dt_start = datetime(2018, 9, 1, 1, 0)
-        dt_end = datetime(2018, 9, 1, 2, 0)
-
-        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end, dst_only=True)
-
-        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30),
-                                               tz=tzi))
-
-    def testSpecifiedTzOverridesAttached(self):
-        # If a tz is specified, the datetime will be treated as naive.
-
-        # This is not ambiguous in the local zone
-        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tz.gettz('Australia/Sydney'))
-
-        self.assertFalse(tz.datetime_ambiguous(dt))
-
-        tzi = tz.gettz('US/Eastern')
-        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi))
-
-
-class DatetimeExistsTest(unittest.TestCase):
-    def testNoTzSpecified(self):
-        with self.assertRaises(ValueError):
-            tz.datetime_exists(datetime(2016, 4, 1, 2, 9))
-
-    def testInGapNaive(self):
-        tzi = tz.gettz('Australia/Sydney')
-
-        dt = datetime(2012, 10, 7, 2, 30)
-
-        self.assertFalse(tz.datetime_exists(dt, tz=tzi))
-
-    def testInGapAware(self):
-        tzi = tz.gettz('Australia/Sydney')
-
-        dt = datetime(2012, 10, 7, 2, 30, tzinfo=tzi)
-
-        self.assertFalse(tz.datetime_exists(dt))
-
-    def testExistsNaive(self):
-        tzi = tz.gettz('Australia/Sydney')
-
-        dt = datetime(2012, 10, 7, 10, 30)
-
-        self.assertTrue(tz.datetime_exists(dt, tz=tzi))
-
-    def testExistsAware(self):
-        tzi = tz.gettz('Australia/Sydney')
-
-        dt = datetime(2012, 10, 7, 10, 30, tzinfo=tzi)
-
-        self.assertTrue(tz.datetime_exists(dt))
-
-    def testSpecifiedTzOverridesAttached(self):
-        EST = tz.gettz('US/Eastern')
-        AEST = tz.gettz('Australia/Sydney')
-
-        dt = datetime(2012, 10, 7, 2, 30, tzinfo=EST)  # This time exists
-
-        self.assertFalse(tz.datetime_exists(dt, tz=AEST))
-
-
+        datetime.now(tzwin.tzwinlocal()) 
+ 
+    def testTzwinLocalUTCOffset(self): 
+        with TZWinContext('Eastern Standard Time'): 
+            tzwl = tzwin.tzwinlocal() 
+            self.assertEqual(datetime(2014, 3, 11, tzinfo=tzwl).utcoffset(), 
+                             timedelta(hours=-4)) 
+ 
+    def testTzwinLocalName(self): 
+        # https://github.com/dateutil/dateutil/issues/143 
+        ESTs = 'Eastern Standard Time' 
+        EDTs = 'Eastern Daylight Time' 
+        transition_dates = [(datetime(2015, 3, 8, 0, 59), ESTs), 
+                            (datetime(2015, 3, 8, 3, 1), EDTs), 
+                            (datetime(2015, 11, 1, 0, 59), EDTs), 
+                            (datetime(2015, 11, 1, 3, 1), ESTs), 
+                            (datetime(2016, 3, 13, 0, 59), ESTs), 
+                            (datetime(2016, 3, 13, 3, 1), EDTs), 
+                            (datetime(2016, 11, 6, 0, 59), EDTs), 
+                            (datetime(2016, 11, 6, 3, 1), ESTs)] 
+ 
+        with TZWinContext('Eastern Standard Time'): 
+            tw = tz.tzwinlocal() 
+ 
+            for t_date, expected in transition_dates: 
+                self.assertEqual(t_date.replace(tzinfo=tw).tzname(), expected) 
+ 
+    def testTzWinLocalRepr(self): 
+        tw = tz.tzwinlocal() 
+        self.assertEqual(repr(tw), 'tzwinlocal()') 
+ 
+    def testTzwinLocalRepr(self): 
+        # https://github.com/dateutil/dateutil/issues/143 
+        with TZWinContext('Eastern Standard Time'): 
+            tw = tz.tzwinlocal() 
+ 
+            self.assertEqual(str(tw), 'tzwinlocal(' + 
+                                      repr('Eastern Standard Time') + ')') 
+ 
+        with TZWinContext('Pacific Standard Time'): 
+            tw = tz.tzwinlocal() 
+ 
+            self.assertEqual(str(tw), 'tzwinlocal(' + 
+                                      repr('Pacific Standard Time') + ')') 
+ 
+    def testTzwinLocalEquality(self): 
+        tw_est = tz.tzwin('Eastern Standard Time') 
+        tw_pst = tz.tzwin('Pacific Standard Time') 
+ 
+        with TZWinContext('Eastern Standard Time'): 
+            twl1 = tz.tzwinlocal() 
+            twl2 = tz.tzwinlocal() 
+ 
+            self.assertEqual(twl1, twl2) 
+            self.assertEqual(twl1, tw_est) 
+            self.assertNotEqual(twl1, tw_pst) 
+ 
+        with TZWinContext('Pacific Standard Time'): 
+            twl1 = tz.tzwinlocal() 
+            twl2 = tz.tzwinlocal() 
+            tw = tz.tzwin('Pacific Standard Time') 
+ 
+            self.assertEqual(twl1, twl2) 
+            self.assertEqual(twl1, tw) 
+            self.assertEqual(twl1, tw_pst) 
+            self.assertNotEqual(twl1, tw_est) 
+ 
+    def testTzwinLocalTimeOnlyDST(self): 
+        # For zones with DST, .dst() should return None 
+        with TZWinContext('Eastern Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertIs(dt_time(14, 10, tzinfo=twl).dst(), None) 
+ 
+        # This zone has no DST, so .dst() can return 0 
+        with TZWinContext('South Africa Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertEqual(dt_time(14, 10, tzinfo=twl).dst(), timedelta(0)) 
+ 
+    def testTzwinLocalTimeOnlyUTCOffset(self): 
+        # For zones with DST, .utcoffset() should return None 
+        with TZWinContext('Eastern Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertIs(dt_time(14, 10, tzinfo=twl).utcoffset(), None) 
+ 
+        # This zone has no DST, so .utcoffset() returns standard offset 
+        with TZWinContext('South Africa Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertEqual(dt_time(14, 10, tzinfo=twl).utcoffset(), 
+                             timedelta(hours=2)) 
+ 
+    def testTzwinLocalTimeOnlyTZName(self): 
+        # For zones with DST, the name defaults to standard time 
+        with TZWinContext('Eastern Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertEqual(dt_time(14, 10, tzinfo=twl).tzname(), 
+                             'Eastern Standard Time') 
+ 
+        # For zones with no DST, this should work normally. 
+        with TZWinContext('South Africa Standard Time'): 
+            twl = tz.tzwinlocal() 
+            self.assertEqual(dt_time(14, 10, tzinfo=twl).tzname(), 
+                             'South Africa Standard Time') 
+ 
+ 
+class TzPickleTest(PicklableMixin, unittest.TestCase): 
+    _asfile = False 
+ 
+    def setUp(self): 
+        self.assertPicklable = partial(self.assertPicklable, 
+                                       asfile=self._asfile) 
+ 
+    def testPickleTzUTC(self): 
+        self.assertPicklable(tz.tzutc(), singleton=True) 
+ 
+    def testPickleTzOffsetZero(self): 
+        self.assertPicklable(tz.tzoffset('UTC', 0), singleton=True) 
+ 
+    def testPickleTzOffsetPos(self): 
+        self.assertPicklable(tz.tzoffset('UTC+1', 3600), singleton=True) 
+ 
+    def testPickleTzOffsetNeg(self): 
+        self.assertPicklable(tz.tzoffset('UTC-1', -3600), singleton=True) 
+ 
+    @pytest.mark.tzlocal 
+    def testPickleTzLocal(self): 
+        self.assertPicklable(tz.tzlocal()) 
+ 
+    def testPickleTzFileEST5EDT(self): 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(TZFILE_EST5EDT))) 
+        self.assertPicklable(tzc) 
+ 
+    def testPickleTzFileEurope_Helsinki(self): 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(EUROPE_HELSINKI))) 
+        self.assertPicklable(tzc) 
+ 
+    def testPickleTzFileNew_York(self): 
+        tzc = tz.tzfile(BytesIO(base64.b64decode(NEW_YORK))) 
+        self.assertPicklable(tzc) 
+ 
+    @unittest.skip("Known failure") 
+    def testPickleTzICal(self): 
+        tzc = tz.tzical(StringIO(TZICAL_EST5EDT)).get() 
+        self.assertPicklable(tzc) 
+ 
+    def testPickleTzGettz(self): 
+        self.assertPicklable(tz.gettz('America/New_York')) 
+ 
+    def testPickleZoneFileGettz(self): 
+        zoneinfo_file = zoneinfo.get_zonefile_instance() 
+        tzi = zoneinfo_file.get('America/New_York') 
+        self.assertIsNot(tzi, None) 
+        self.assertPicklable(tzi) 
+ 
+ 
+class TzPickleFileTest(TzPickleTest): 
+    """ Run all the TzPickleTest tests, using a temporary file """ 
+    _asfile = True 
+ 
+ 
+class DatetimeAmbiguousTest(unittest.TestCase): 
+    """ Test the datetime_exists / datetime_ambiguous functions """ 
+ 
+    def testNoTzSpecified(self): 
+        with self.assertRaises(ValueError): 
+            tz.datetime_ambiguous(datetime(2016, 4, 1, 2, 9)) 
+ 
+    def _get_no_support_tzinfo_class(self, dt_start, dt_end, dst_only=False): 
+        # Generates a class of tzinfo with no support for is_ambiguous 
+        # where dates between dt_start and dt_end are ambiguous. 
+ 
+        class FoldingTzInfo(tzinfo): 
+            def utcoffset(self, dt): 
+                if not dst_only: 
+                    dt_n = dt.replace(tzinfo=None) 
+ 
+                    if dt_start <= dt_n < dt_end and getattr(dt_n, 'fold', 0): 
+                        return timedelta(hours=-1) 
+ 
+                return timedelta(hours=0) 
+ 
+            def dst(self, dt): 
+                dt_n = dt.replace(tzinfo=None) 
+ 
+                if dt_start <= dt_n < dt_end and getattr(dt_n, 'fold', 0): 
+                    return timedelta(hours=1) 
+                else: 
+                    return timedelta(0) 
+ 
+        return FoldingTzInfo 
+ 
+    def _get_no_support_tzinfo(self, dt_start, dt_end, dst_only=False): 
+        return self._get_no_support_tzinfo_class(dt_start, dt_end, dst_only)() 
+ 
+    def testNoSupportAmbiguityFoldNaive(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30), 
+                                              tz=tzi)) 
+ 
+    def testNoSupportAmbiguityFoldAware(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30, 
+                                                       tzinfo=tzi))) 
+ 
+    def testNoSupportAmbiguityUnambiguousNaive(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30), 
+                                              tz=tzi)) 
+ 
+    def testNoSupportAmbiguityUnambiguousAware(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30, 
+                                                        tzinfo=tzi))) 
+ 
+    def testNoSupportAmbiguityFoldDSTOnly(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end, dst_only=True) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30), 
+                                              tz=tzi)) 
+ 
+    def testNoSupportAmbiguityUnambiguousDSTOnly(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_no_support_tzinfo(dt_start, dt_end, dst_only=True) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30), 
+                                               tz=tzi)) 
+ 
+    def testSupportAmbiguityFoldNaive(self): 
+        tzi = tz.gettz('US/Eastern') 
+ 
+        dt = datetime(2011, 11, 6, 1, 30) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi)) 
+ 
+    def testSupportAmbiguityFoldAware(self): 
+        tzi = tz.gettz('US/Eastern') 
+ 
+        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tzi) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(dt)) 
+ 
+    def testSupportAmbiguityUnambiguousAware(self): 
+        tzi = tz.gettz('US/Eastern') 
+ 
+        dt = datetime(2011, 11, 6, 4, 30) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(dt, tz=tzi)) 
+ 
+    def testSupportAmbiguityUnambiguousNaive(self): 
+        tzi = tz.gettz('US/Eastern') 
+ 
+        dt = datetime(2011, 11, 6, 4, 30, tzinfo=tzi) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(dt)) 
+ 
+    def _get_ambig_error_tzinfo(self, dt_start, dt_end, dst_only=False): 
+        cTzInfo = self._get_no_support_tzinfo_class(dt_start, dt_end, dst_only) 
+ 
+        # Takes the wrong number of arguments and raises an error anyway. 
+        class FoldTzInfoRaises(cTzInfo): 
+            def is_ambiguous(self, dt, other_arg): 
+                raise NotImplementedError('This is not implemented') 
+ 
+        return FoldTzInfoRaises() 
+ 
+    def testIncompatibleAmbiguityFoldNaive(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30), 
+                                              tz=tzi)) 
+ 
+    def testIncompatibleAmbiguityFoldAware(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30, 
+                                                       tzinfo=tzi))) 
+ 
+    def testIncompatibleAmbiguityUnambiguousNaive(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30), 
+                                              tz=tzi)) 
+ 
+    def testIncompatibleAmbiguityUnambiguousAware(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30, 
+                                                        tzinfo=tzi))) 
+ 
+    def testIncompatibleAmbiguityFoldDSTOnly(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end, dst_only=True) 
+ 
+        self.assertTrue(tz.datetime_ambiguous(datetime(2018, 9, 1, 1, 30), 
+                                              tz=tzi)) 
+ 
+    def testIncompatibleAmbiguityUnambiguousDSTOnly(self): 
+        dt_start = datetime(2018, 9, 1, 1, 0) 
+        dt_end = datetime(2018, 9, 1, 2, 0) 
+ 
+        tzi = self._get_ambig_error_tzinfo(dt_start, dt_end, dst_only=True) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(datetime(2018, 10, 1, 12, 30), 
+                                               tz=tzi)) 
+ 
+    def testSpecifiedTzOverridesAttached(self): 
+        # If a tz is specified, the datetime will be treated as naive. 
+ 
+        # This is not ambiguous in the local zone 
+        dt = datetime(2011, 11, 6, 1, 30, tzinfo=tz.gettz('Australia/Sydney')) 
+ 
+        self.assertFalse(tz.datetime_ambiguous(dt)) 
+ 
+        tzi = tz.gettz('US/Eastern') 
+        self.assertTrue(tz.datetime_ambiguous(dt, tz=tzi)) 
+ 
+ 
+class DatetimeExistsTest(unittest.TestCase): 
+    def testNoTzSpecified(self): 
+        with self.assertRaises(ValueError): 
+            tz.datetime_exists(datetime(2016, 4, 1, 2, 9)) 
+ 
+    def testInGapNaive(self): 
+        tzi = tz.gettz('Australia/Sydney') 
+ 
+        dt = datetime(2012, 10, 7, 2, 30) 
+ 
+        self.assertFalse(tz.datetime_exists(dt, tz=tzi)) 
+ 
+    def testInGapAware(self): 
+        tzi = tz.gettz('Australia/Sydney') 
+ 
+        dt = datetime(2012, 10, 7, 2, 30, tzinfo=tzi) 
+ 
+        self.assertFalse(tz.datetime_exists(dt)) 
+ 
+    def testExistsNaive(self): 
+        tzi = tz.gettz('Australia/Sydney') 
+ 
+        dt = datetime(2012, 10, 7, 10, 30) 
+ 
+        self.assertTrue(tz.datetime_exists(dt, tz=tzi)) 
+ 
+    def testExistsAware(self): 
+        tzi = tz.gettz('Australia/Sydney') 
+ 
+        dt = datetime(2012, 10, 7, 10, 30, tzinfo=tzi) 
+ 
+        self.assertTrue(tz.datetime_exists(dt)) 
+ 
+    def testSpecifiedTzOverridesAttached(self): 
+        EST = tz.gettz('US/Eastern') 
+        AEST = tz.gettz('Australia/Sydney') 
+ 
+        dt = datetime(2012, 10, 7, 2, 30, tzinfo=EST)  # This time exists 
+ 
+        self.assertFalse(tz.datetime_exists(dt, tz=AEST)) 
+ 
+ 
 class TestEnfold:
     def test_enter_fold_default(self):
-        dt = tz.enfold(datetime(2020, 1, 19, 3, 32))
-
+        dt = tz.enfold(datetime(2020, 1, 19, 3, 32)) 
+ 
         assert dt.fold == 1
-
+ 
     def test_enter_fold(self):
-        dt = tz.enfold(datetime(2020, 1, 19, 3, 32), fold=1)
-
+        dt = tz.enfold(datetime(2020, 1, 19, 3, 32), fold=1) 
+ 
         assert dt.fold == 1
-
+ 
     def test_exit_fold(self):
-        dt = tz.enfold(datetime(2020, 1, 19, 3, 32), fold=0)
-
-        # Before Python 3.6, dt.fold won't exist if fold is 0.
+        dt = tz.enfold(datetime(2020, 1, 19, 3, 32), fold=0) 
+ 
+        # Before Python 3.6, dt.fold won't exist if fold is 0. 
         assert getattr(dt, 'fold', 0) == 0
-
+ 
     def test_defold(self):
         dt = tz.enfold(datetime(2020, 1, 19, 3, 32), fold=1)
-
+ 
         dt2 = tz.enfold(dt, fold=0)
 
         assert getattr(dt2, 'fold', 0) == 0
@@ -2703,109 +2703,109 @@ class TestEnfold:
             dt.replace(1950, year=2000)
 
 
-@pytest.mark.tz_resolve_imaginary
-class ImaginaryDateTest(unittest.TestCase):
-    def testCanberraForward(self):
-        tzi = tz.gettz('Australia/Canberra')
-        dt = datetime(2018, 10, 7, 2, 30, tzinfo=tzi)
-        dt_act = tz.resolve_imaginary(dt)
-        dt_exp = datetime(2018, 10, 7, 3, 30, tzinfo=tzi)
-        self.assertEqual(dt_act, dt_exp)
-
-    def testLondonForward(self):
-        tzi = tz.gettz('Europe/London')
-        dt = datetime(2018, 3, 25, 1, 30, tzinfo=tzi)
-        dt_act = tz.resolve_imaginary(dt)
-        dt_exp = datetime(2018, 3, 25, 2, 30, tzinfo=tzi)
-        self.assertEqual(dt_act, dt_exp)
-
-    def testKeivForward(self):
-        tzi = tz.gettz('Europe/Kiev')
-        dt = datetime(2018, 3, 25, 3, 30, tzinfo=tzi)
-        dt_act = tz.resolve_imaginary(dt)
-        dt_exp = datetime(2018, 3, 25, 4, 30, tzinfo=tzi)
-        self.assertEqual(dt_act, dt_exp)
-
-
-@pytest.mark.tz_resolve_imaginary
-@pytest.mark.parametrize('dt', [
-    datetime(2017, 11, 5, 1, 30, tzinfo=tz.gettz('America/New_York')),
-    datetime(2018, 10, 28, 1, 30, tzinfo=tz.gettz('Europe/London')),
-    datetime(2017, 4, 2, 2, 30, tzinfo=tz.gettz('Australia/Sydney')),
-])
-def test_resolve_imaginary_ambiguous(dt):
-    assert tz.resolve_imaginary(dt) is dt
-
-    dt_f = tz.enfold(dt)
-    assert dt is not dt_f
-    assert tz.resolve_imaginary(dt_f) is dt_f
-
-
-@pytest.mark.tz_resolve_imaginary
-@pytest.mark.parametrize('dt', [
-    datetime(2017, 6, 2, 12, 30, tzinfo=tz.gettz('America/New_York')),
-    datetime(2018, 4, 2, 9, 30, tzinfo=tz.gettz('Europe/London')),
-    datetime(2017, 2, 2, 16, 30, tzinfo=tz.gettz('Australia/Sydney')),
-    datetime(2017, 12, 2, 12, 30, tzinfo=tz.gettz('America/New_York')),
-    datetime(2018, 12, 2, 9, 30, tzinfo=tz.gettz('Europe/London')),
-    datetime(2017, 6, 2, 16, 30, tzinfo=tz.gettz('Australia/Sydney')),
+@pytest.mark.tz_resolve_imaginary 
+class ImaginaryDateTest(unittest.TestCase): 
+    def testCanberraForward(self): 
+        tzi = tz.gettz('Australia/Canberra') 
+        dt = datetime(2018, 10, 7, 2, 30, tzinfo=tzi) 
+        dt_act = tz.resolve_imaginary(dt) 
+        dt_exp = datetime(2018, 10, 7, 3, 30, tzinfo=tzi) 
+        self.assertEqual(dt_act, dt_exp) 
+ 
+    def testLondonForward(self): 
+        tzi = tz.gettz('Europe/London') 
+        dt = datetime(2018, 3, 25, 1, 30, tzinfo=tzi) 
+        dt_act = tz.resolve_imaginary(dt) 
+        dt_exp = datetime(2018, 3, 25, 2, 30, tzinfo=tzi) 
+        self.assertEqual(dt_act, dt_exp) 
+ 
+    def testKeivForward(self): 
+        tzi = tz.gettz('Europe/Kiev') 
+        dt = datetime(2018, 3, 25, 3, 30, tzinfo=tzi) 
+        dt_act = tz.resolve_imaginary(dt) 
+        dt_exp = datetime(2018, 3, 25, 4, 30, tzinfo=tzi) 
+        self.assertEqual(dt_act, dt_exp) 
+ 
+ 
+@pytest.mark.tz_resolve_imaginary 
+@pytest.mark.parametrize('dt', [ 
+    datetime(2017, 11, 5, 1, 30, tzinfo=tz.gettz('America/New_York')), 
+    datetime(2018, 10, 28, 1, 30, tzinfo=tz.gettz('Europe/London')), 
+    datetime(2017, 4, 2, 2, 30, tzinfo=tz.gettz('Australia/Sydney')), 
+]) 
+def test_resolve_imaginary_ambiguous(dt): 
+    assert tz.resolve_imaginary(dt) is dt 
+ 
+    dt_f = tz.enfold(dt) 
+    assert dt is not dt_f 
+    assert tz.resolve_imaginary(dt_f) is dt_f 
+ 
+ 
+@pytest.mark.tz_resolve_imaginary 
+@pytest.mark.parametrize('dt', [ 
+    datetime(2017, 6, 2, 12, 30, tzinfo=tz.gettz('America/New_York')), 
+    datetime(2018, 4, 2, 9, 30, tzinfo=tz.gettz('Europe/London')), 
+    datetime(2017, 2, 2, 16, 30, tzinfo=tz.gettz('Australia/Sydney')), 
+    datetime(2017, 12, 2, 12, 30, tzinfo=tz.gettz('America/New_York')), 
+    datetime(2018, 12, 2, 9, 30, tzinfo=tz.gettz('Europe/London')), 
+    datetime(2017, 6, 2, 16, 30, tzinfo=tz.gettz('Australia/Sydney')), 
     datetime(2025, 9, 25, 1, 17, tzinfo=tz.UTC),
-    datetime(2025, 9, 25, 1, 17, tzinfo=tz.tzoffset('EST', -18000)),
-    datetime(2019, 3, 4, tzinfo=None)
-])
-def test_resolve_imaginary_existing(dt):
-    assert tz.resolve_imaginary(dt) is dt
-
-
-def __get_kiritimati_resolve_imaginary_test():
-    # In the 2018d release of the IANA database, the Kiritimati "imaginary day"
-    # data was corrected, so if the system zoneinfo is older than 2018d, the
-    # Kiritimati test will fail.
-
-    tzi = tz.gettz('Pacific/Kiritimati')
-    new_version = False
-    if not tz.datetime_exists(datetime(1995, 1, 1, 12, 30), tzi):
-        zif = zoneinfo.get_zonefile_instance()
-        if zif.metadata is not None:
-            new_version = zif.metadata['tzversion'] >= '2018d'
-
-        if new_version:
-            tzi = zif.get('Pacific/Kiritimati')
-    else:
-        new_version = True
-
-    if new_version:
-        dates = (datetime(1994, 12, 31, 12, 30), datetime(1995, 1, 1, 12, 30))
-    else:
-        dates = (datetime(1995, 1, 1, 12, 30), datetime(1995, 1, 2, 12, 30))
-
-    return (tzi, ) + dates
-
-
+    datetime(2025, 9, 25, 1, 17, tzinfo=tz.tzoffset('EST', -18000)), 
+    datetime(2019, 3, 4, tzinfo=None) 
+]) 
+def test_resolve_imaginary_existing(dt): 
+    assert tz.resolve_imaginary(dt) is dt 
+ 
+ 
+def __get_kiritimati_resolve_imaginary_test(): 
+    # In the 2018d release of the IANA database, the Kiritimati "imaginary day" 
+    # data was corrected, so if the system zoneinfo is older than 2018d, the 
+    # Kiritimati test will fail. 
+ 
+    tzi = tz.gettz('Pacific/Kiritimati') 
+    new_version = False 
+    if not tz.datetime_exists(datetime(1995, 1, 1, 12, 30), tzi): 
+        zif = zoneinfo.get_zonefile_instance() 
+        if zif.metadata is not None: 
+            new_version = zif.metadata['tzversion'] >= '2018d' 
+ 
+        if new_version: 
+            tzi = zif.get('Pacific/Kiritimati') 
+    else: 
+        new_version = True 
+ 
+    if new_version: 
+        dates = (datetime(1994, 12, 31, 12, 30), datetime(1995, 1, 1, 12, 30)) 
+    else: 
+        dates = (datetime(1995, 1, 1, 12, 30), datetime(1995, 1, 2, 12, 30)) 
+ 
+    return (tzi, ) + dates 
+ 
+ 
 resolve_imaginary_tests = [
-    (tz.gettz('Europe/London'),
-     datetime(2018, 3, 25, 1, 30), datetime(2018, 3, 25, 2, 30)),
-    (tz.gettz('America/New_York'),
-     datetime(2017, 3, 12, 2, 30), datetime(2017, 3, 12, 3, 30)),
-    (tz.gettz('Australia/Sydney'),
-     datetime(2014, 10, 5, 2, 0), datetime(2014, 10, 5, 3, 0)),
-    __get_kiritimati_resolve_imaginary_test(),
+    (tz.gettz('Europe/London'), 
+     datetime(2018, 3, 25, 1, 30), datetime(2018, 3, 25, 2, 30)), 
+    (tz.gettz('America/New_York'), 
+     datetime(2017, 3, 12, 2, 30), datetime(2017, 3, 12, 3, 30)), 
+    (tz.gettz('Australia/Sydney'), 
+     datetime(2014, 10, 5, 2, 0), datetime(2014, 10, 5, 3, 0)), 
+    __get_kiritimati_resolve_imaginary_test(), 
 ]
-
-
+ 
+ 
 if SUPPORTS_SUB_MINUTE_OFFSETS:
     resolve_imaginary_tests.append(
         (tz.gettz('Africa/Monrovia'),
          datetime(1972, 1, 7, 0, 30), datetime(1972, 1, 7, 1, 14, 30)))
+ 
 
-
-@pytest.mark.tz_resolve_imaginary
+@pytest.mark.tz_resolve_imaginary 
 @pytest.mark.parametrize('tzi, dt, dt_exp', resolve_imaginary_tests)
 def test_resolve_imaginary(tzi, dt, dt_exp):
     dt = dt.replace(tzinfo=tzi)
     dt_exp = dt_exp.replace(tzinfo=tzi)
-
-    dt_r = tz.resolve_imaginary(dt)
-    assert dt_r == dt_exp
-    assert dt_r.tzname() == dt_exp.tzname()
-    assert dt_r.utcoffset() == dt_exp.utcoffset()
+ 
+    dt_r = tz.resolve_imaginary(dt) 
+    assert dt_r == dt_exp 
+    assert dt_r.tzname() == dt_exp.tzname() 
+    assert dt_r.utcoffset() == dt_exp.utcoffset() 
diff --git a/contrib/python/dateutil/dateutil/test/test_utils.py b/contrib/python/dateutil/dateutil/test/test_utils.py
index fe1bfdcb84..2b41c7ecfe 100644
--- a/contrib/python/dateutil/dateutil/test/test_utils.py
+++ b/contrib/python/dateutil/dateutil/test/test_utils.py
@@ -1,37 +1,37 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-from datetime import timedelta, datetime
-
-from dateutil import tz
-from dateutil import utils
+# -*- coding: utf-8 -*- 
+from __future__ import unicode_literals 
+from datetime import timedelta, datetime 
+ 
+from dateutil import tz 
+from dateutil import utils 
 from dateutil.tz import UTC
-from dateutil.utils import within_delta
-
-from freezegun import freeze_time
-
-NYC = tz.gettz("America/New_York")
-
-
+from dateutil.utils import within_delta 
+ 
+from freezegun import freeze_time 
+ 
+NYC = tz.gettz("America/New_York") 
+ 
+ 
 @freeze_time(datetime(2014, 12, 15, 1, 21, 33, 4003))
 def test_utils_today():
     assert utils.today() == datetime(2014, 12, 15, 0, 0, 0)
-
-
+ 
+ 
 @freeze_time(datetime(2014, 12, 15, 12), tz_offset=5)
 def test_utils_today_tz_info():
     assert utils.today(NYC) == datetime(2014, 12, 15, 0, 0, 0, tzinfo=NYC)
-
-
+ 
+ 
 @freeze_time(datetime(2014, 12, 15, 23), tz_offset=5)
 def test_utils_today_tz_info_different_day():
     assert utils.today(UTC) == datetime(2014, 12, 16, 0, 0, 0, tzinfo=UTC)
-
-
+ 
+ 
 def test_utils_default_tz_info_naive():
     dt = datetime(2014, 9, 14, 9, 30)
     assert utils.default_tzinfo(dt, NYC).tzinfo is NYC
-
-
+ 
+ 
 def test_utils_default_tz_info_aware():
     dt = datetime(2014, 9, 14, 9, 30, tzinfo=UTC)
     assert utils.default_tzinfo(dt, NYC).tzinfo is UTC
diff --git a/contrib/python/dateutil/dateutil/tz/__init__.py b/contrib/python/dateutil/dateutil/tz/__init__.py
index af1352c472..98d1589dfb 100644
--- a/contrib/python/dateutil/dateutil/tz/__init__.py
+++ b/contrib/python/dateutil/dateutil/tz/__init__.py
@@ -1,12 +1,12 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*- 
 from .tz import *
-from .tz import __doc__
+from .tz import __doc__ 
 
 __all__ = ["tzutc", "tzoffset", "tzlocal", "tzfile", "tzrange",
            "tzstr", "tzical", "tzwin", "tzwinlocal", "gettz",
-           "enfold", "datetime_ambiguous", "datetime_exists",
-           "resolve_imaginary", "UTC", "DeprecatedTzFormatWarning"]
-
-
-class DeprecatedTzFormatWarning(Warning):
-    """Warning raised when time zones are parsed from deprecated formats."""
+           "enfold", "datetime_ambiguous", "datetime_exists", 
+           "resolve_imaginary", "UTC", "DeprecatedTzFormatWarning"] 
+ 
+ 
+class DeprecatedTzFormatWarning(Warning): 
+    """Warning raised when time zones are parsed from deprecated formats.""" 
diff --git a/contrib/python/dateutil/dateutil/tz/_common.py b/contrib/python/dateutil/dateutil/tz/_common.py
index e6ac118315..55cbd79170 100644
--- a/contrib/python/dateutil/dateutil/tz/_common.py
+++ b/contrib/python/dateutil/dateutil/tz/_common.py
@@ -65,36 +65,36 @@ else:
         """
         __slots__ = ()
 
-        def replace(self, *args, **kwargs):
-            """
-            Return a datetime with the same attributes, except for those
-            attributes given new values by whichever keyword arguments are
-            specified. Note that tzinfo=None can be specified to create a naive
-            datetime from an aware datetime with no conversion of date and time
-            data.
-
-            This is reimplemented in ``_DatetimeWithFold`` because pypy3 will
-            return a ``datetime.datetime`` even if ``fold`` is unchanged.
-            """
-            argnames = (
-                'year', 'month', 'day', 'hour', 'minute', 'second',
-                'microsecond', 'tzinfo'
-            )
-
-            for arg, argname in zip(args, argnames):
-                if argname in kwargs:
-                    raise TypeError('Duplicate argument: {}'.format(argname))
-
-                kwargs[argname] = arg
-
-            for argname in argnames:
-                if argname not in kwargs:
-                    kwargs[argname] = getattr(self, argname)
-
-            dt_class = self.__class__ if kwargs.get('fold', 1) else datetime
-
-            return dt_class(**kwargs)
-
+        def replace(self, *args, **kwargs): 
+            """ 
+            Return a datetime with the same attributes, except for those 
+            attributes given new values by whichever keyword arguments are 
+            specified. Note that tzinfo=None can be specified to create a naive 
+            datetime from an aware datetime with no conversion of date and time 
+            data. 
+ 
+            This is reimplemented in ``_DatetimeWithFold`` because pypy3 will 
+            return a ``datetime.datetime`` even if ``fold`` is unchanged. 
+            """ 
+            argnames = ( 
+                'year', 'month', 'day', 'hour', 'minute', 'second', 
+                'microsecond', 'tzinfo' 
+            ) 
+ 
+            for arg, argname in zip(args, argnames): 
+                if argname in kwargs: 
+                    raise TypeError('Duplicate argument: {}'.format(argname)) 
+ 
+                kwargs[argname] = arg 
+ 
+            for argname in argnames: 
+                if argname not in kwargs: 
+                    kwargs[argname] = getattr(self, argname) 
+ 
+            dt_class = self.__class__ if kwargs.get('fold', 1) else datetime 
+ 
+            return dt_class(**kwargs) 
+ 
         @property
         def fold(self):
             return 1
diff --git a/contrib/python/dateutil/dateutil/tz/_factories.py b/contrib/python/dateutil/dateutil/tz/_factories.py
index f8a65891a0..fe43054379 100644
--- a/contrib/python/dateutil/dateutil/tz/_factories.py
+++ b/contrib/python/dateutil/dateutil/tz/_factories.py
@@ -1,41 +1,41 @@
-from datetime import timedelta
+from datetime import timedelta 
 import weakref
 from collections import OrderedDict
-
+ 
 from six.moves import _thread
-
-
-class _TzSingleton(type):
-    def __init__(cls, *args, **kwargs):
-        cls.__instance = None
-        super(_TzSingleton, cls).__init__(*args, **kwargs)
-
-    def __call__(cls):
-        if cls.__instance is None:
-            cls.__instance = super(_TzSingleton, cls).__call__()
-        return cls.__instance
-
-
-class _TzFactory(type):
-    def instance(cls, *args, **kwargs):
-        """Alternate constructor that returns a fresh instance"""
-        return type.__call__(cls, *args, **kwargs)
-
-
-class _TzOffsetFactory(_TzFactory):
-    def __init__(cls, *args, **kwargs):
+ 
+
+class _TzSingleton(type): 
+    def __init__(cls, *args, **kwargs): 
+        cls.__instance = None 
+        super(_TzSingleton, cls).__init__(*args, **kwargs) 
+ 
+    def __call__(cls): 
+        if cls.__instance is None: 
+            cls.__instance = super(_TzSingleton, cls).__call__() 
+        return cls.__instance 
+ 
+
+class _TzFactory(type): 
+    def instance(cls, *args, **kwargs): 
+        """Alternate constructor that returns a fresh instance""" 
+        return type.__call__(cls, *args, **kwargs) 
+ 
+ 
+class _TzOffsetFactory(_TzFactory): 
+    def __init__(cls, *args, **kwargs): 
         cls.__instances = weakref.WeakValueDictionary()
         cls.__strong_cache = OrderedDict()
         cls.__strong_cache_size = 8
 
         cls._cache_lock = _thread.allocate_lock()
-
-    def __call__(cls, name, offset):
+ 
+    def __call__(cls, name, offset): 
         if isinstance(offset, timedelta):
             key = (name, offset.total_seconds())
         else:
             key = (name, offset)
-
+ 
         instance = cls.__instances.get(key, None)
         if instance is None:
             instance = cls.__instances.setdefault(key,
@@ -49,21 +49,21 @@ class _TzOffsetFactory(_TzFactory):
             if len(cls.__strong_cache) > cls.__strong_cache_size:
                 cls.__strong_cache.popitem(last=False)
 
-        return instance
-
-
-class _TzStrFactory(_TzFactory):
-    def __init__(cls, *args, **kwargs):
+        return instance 
+ 
+ 
+class _TzStrFactory(_TzFactory): 
+    def __init__(cls, *args, **kwargs): 
         cls.__instances = weakref.WeakValueDictionary()
         cls.__strong_cache = OrderedDict()
         cls.__strong_cache_size = 8
-
+ 
         cls.__cache_lock = _thread.allocate_lock()
 
-    def __call__(cls, s, posix_offset=False):
+    def __call__(cls, s, posix_offset=False): 
         key = (s, posix_offset)
         instance = cls.__instances.get(key, None)
-
+ 
         if instance is None:
             instance = cls.__instances.setdefault(key,
                 cls.instance(s, posix_offset))
@@ -76,5 +76,5 @@ class _TzStrFactory(_TzFactory):
             if len(cls.__strong_cache) > cls.__strong_cache_size:
                 cls.__strong_cache.popitem(last=False)
 
-        return instance
+        return instance 
 
diff --git a/contrib/python/dateutil/dateutil/tz/tz.py b/contrib/python/dateutil/dateutil/tz/tz.py
index c67f56d465..246500e2ce 100644
--- a/contrib/python/dateutil/dateutil/tz/tz.py
+++ b/contrib/python/dateutil/dateutil/tz/tz.py
@@ -1,10 +1,10 @@
 # -*- coding: utf-8 -*-
 """
 This module offers timezone implementations subclassing the abstract
-:py:class:`datetime.tzinfo` type. There are classes to handle tzfile format
-files (usually are in :file:`/etc/localtime`, :file:`/usr/share/zoneinfo`,
-etc), TZ environment string (in all known formats), given ranges (with help
-from relative deltas), local machine timezone, fixed offset timezone, and UTC
+:py:class:`datetime.tzinfo` type. There are classes to handle tzfile format 
+files (usually are in :file:`/etc/localtime`, :file:`/usr/share/zoneinfo`, 
+etc), TZ environment string (in all known formats), given ranges (with help 
+from relative deltas), local machine timezone, fixed offset timezone, and UTC 
 timezone.
 """
 import datetime
@@ -16,15 +16,15 @@ import bisect
 import weakref
 from collections import OrderedDict
 
-import six
+import six 
 from six import string_types
-from six.moves import _thread
-from ._common import tzname_in_python2, _tzinfo
+from six.moves import _thread 
+from ._common import tzname_in_python2, _tzinfo 
 from ._common import tzrangebase, enfold
 from ._common import _validate_fromutc_inputs
 
-from ._factories import _TzSingleton, _TzOffsetFactory
-from ._factories import _TzStrFactory
+from ._factories import _TzSingleton, _TzOffsetFactory 
+from ._factories import _TzStrFactory 
 try:
     from .win import tzwin, tzwinlocal
 except ImportError:
@@ -38,38 +38,38 @@ EPOCH = datetime.datetime.utcfromtimestamp(0)
 EPOCHORDINAL = EPOCH.toordinal()
 
 
-@six.add_metaclass(_TzSingleton)
+@six.add_metaclass(_TzSingleton) 
 class tzutc(datetime.tzinfo):
     """
     This is a tzinfo object that represents the UTC time zone.
-
-    **Examples:**
-
-    .. doctest::
-
-        >>> from datetime import *
-        >>> from dateutil.tz import *
-
-        >>> datetime.now()
-        datetime.datetime(2003, 9, 27, 9, 40, 1, 521290)
-
-        >>> datetime.now(tzutc())
-        datetime.datetime(2003, 9, 27, 12, 40, 12, 156379, tzinfo=tzutc())
-
-        >>> datetime.now(tzutc()).tzname()
-        'UTC'
-
-    .. versionchanged:: 2.7.0
-        ``tzutc()`` is now a singleton, so the result of ``tzutc()`` will
-        always return the same object.
-
-        .. doctest::
-
-            >>> from dateutil.tz import tzutc, UTC
-            >>> tzutc() is tzutc()
-            True
-            >>> tzutc() is UTC
-            True
+ 
+    **Examples:** 
+ 
+    .. doctest:: 
+ 
+        >>> from datetime import * 
+        >>> from dateutil.tz import * 
+ 
+        >>> datetime.now() 
+        datetime.datetime(2003, 9, 27, 9, 40, 1, 521290) 
+ 
+        >>> datetime.now(tzutc()) 
+        datetime.datetime(2003, 9, 27, 12, 40, 12, 156379, tzinfo=tzutc()) 
+ 
+        >>> datetime.now(tzutc()).tzname() 
+        'UTC' 
+ 
+    .. versionchanged:: 2.7.0 
+        ``tzutc()`` is now a singleton, so the result of ``tzutc()`` will 
+        always return the same object. 
+ 
+        .. doctest:: 
+ 
+            >>> from dateutil.tz import tzutc, UTC 
+            >>> tzutc() is tzutc() 
+            True 
+            >>> tzutc() is UTC 
+            True 
     """
     def utcoffset(self, dt):
         return ZERO
@@ -129,7 +129,7 @@ class tzutc(datetime.tzinfo):
 UTC = tzutc()
 
 
-@six.add_metaclass(_TzOffsetFactory)
+@six.add_metaclass(_TzOffsetFactory) 
 class tzoffset(datetime.tzinfo):
     """
     A simple class for representing a fixed offset from UTC.
@@ -138,14 +138,14 @@ class tzoffset(datetime.tzinfo):
         The timezone name, to be returned when ``tzname()`` is called.
     :param offset:
         The time zone offset in seconds, or (since version 2.6.0, represented
-        as a :py:class:`datetime.timedelta` object).
+        as a :py:class:`datetime.timedelta` object). 
     """
     def __init__(self, name, offset):
         self._name = name
 
         try:
             # Allow a timedelta
-            offset = offset.total_seconds()
+            offset = offset.total_seconds() 
         except (TypeError, AttributeError):
             pass
 
@@ -193,7 +193,7 @@ class tzoffset(datetime.tzinfo):
     def __repr__(self):
         return "%s(%s, %s)" % (self.__class__.__name__,
                                repr(self._name),
-                               int(self._offset.total_seconds()))
+                               int(self._offset.total_seconds())) 
 
     __reduce__ = object.__reduce__
 
@@ -213,7 +213,7 @@ class tzlocal(_tzinfo):
 
         self._dst_saved = self._dst_offset - self._std_offset
         self._hasdst = bool(self._dst_saved)
-        self._tznames = tuple(time.tzname)
+        self._tznames = tuple(time.tzname) 
 
     def utcoffset(self, dt):
         if dt is None and self._hasdst:
@@ -235,7 +235,7 @@ class tzlocal(_tzinfo):
 
     @tzname_in_python2
     def tzname(self, dt):
-        return self._tznames[self._isdst(dt)]
+        return self._tznames[self._isdst(dt)] 
 
     def is_ambiguous(self, dt):
         """
@@ -300,18 +300,18 @@ class tzlocal(_tzinfo):
         return dstval
 
     def __eq__(self, other):
-        if isinstance(other, tzlocal):
-            return (self._std_offset == other._std_offset and
-                    self._dst_offset == other._dst_offset)
-        elif isinstance(other, tzutc):
-            return (not self._hasdst and
-                    self._tznames[0] in {'UTC', 'GMT'} and
-                    self._std_offset == ZERO)
-        elif isinstance(other, tzoffset):
-            return (not self._hasdst and
-                    self._tznames[0] == other._name and
-                    self._std_offset == other._offset)
-        else:
+        if isinstance(other, tzlocal): 
+            return (self._std_offset == other._std_offset and 
+                    self._dst_offset == other._dst_offset) 
+        elif isinstance(other, tzutc): 
+            return (not self._hasdst and 
+                    self._tznames[0] in {'UTC', 'GMT'} and 
+                    self._std_offset == ZERO) 
+        elif isinstance(other, tzoffset): 
+            return (not self._hasdst and 
+                    self._tznames[0] == other._name and 
+                    self._std_offset == other._offset) 
+        else: 
             return NotImplemented
 
     __hash__ = None
@@ -399,60 +399,60 @@ class tzfile(_tzinfo):
         ``fileobj``'s ``name`` attribute or to ``repr(fileobj)``.
 
     See `Sources for Time Zone and Daylight Saving Time Data
-    <https://data.iana.org/time-zones/tz-link.html>`_ for more information.
-    Time zone files can be compiled from the `IANA Time Zone database files
+    <https://data.iana.org/time-zones/tz-link.html>`_ for more information. 
+    Time zone files can be compiled from the `IANA Time Zone database files 
     <https://www.iana.org/time-zones>`_ with the `zic time zone compiler
     <https://www.freebsd.org/cgi/man.cgi?query=zic&sektion=8>`_
-
-    .. note::
-
-        Only construct a ``tzfile`` directly if you have a specific timezone
-        file on disk that you want to read into a Python ``tzinfo`` object.
-        If you want to get a ``tzfile`` representing a specific IANA zone,
-        (e.g. ``'America/New_York'``), you should call
-        :func:`dateutil.tz.gettz` with the zone identifier.
-
-
-    **Examples:**
-
-    Using the US Eastern time zone as an example, we can see that a ``tzfile``
-    provides time zone information for the standard Daylight Saving offsets:
-
-    .. testsetup:: tzfile
-
-        from dateutil.tz import gettz
-        from datetime import datetime
-
-    .. doctest:: tzfile
-
-        >>> NYC = gettz('America/New_York')
-        >>> NYC
-        tzfile('/usr/share/zoneinfo/America/New_York')
-
-        >>> print(datetime(2016, 1, 3, tzinfo=NYC))     # EST
-        2016-01-03 00:00:00-05:00
-
-        >>> print(datetime(2016, 7, 7, tzinfo=NYC))     # EDT
-        2016-07-07 00:00:00-04:00
-
-
-    The ``tzfile`` structure contains a fully history of the time zone,
-    so historical dates will also have the right offsets. For example, before
-    the adoption of the UTC standards, New York used local solar  mean time:
-
-    .. doctest:: tzfile
-
-       >>> print(datetime(1901, 4, 12, tzinfo=NYC))    # LMT
-       1901-04-12 00:00:00-04:56
-
-    And during World War II, New York was on "Eastern War Time", which was a
-    state of permanent daylight saving time:
-
-    .. doctest:: tzfile
-
-        >>> print(datetime(1944, 2, 7, tzinfo=NYC))    # EWT
-        1944-02-07 00:00:00-04:00
-
+ 
+    .. note:: 
+ 
+        Only construct a ``tzfile`` directly if you have a specific timezone 
+        file on disk that you want to read into a Python ``tzinfo`` object. 
+        If you want to get a ``tzfile`` representing a specific IANA zone, 
+        (e.g. ``'America/New_York'``), you should call 
+        :func:`dateutil.tz.gettz` with the zone identifier. 
+ 
+ 
+    **Examples:** 
+ 
+    Using the US Eastern time zone as an example, we can see that a ``tzfile`` 
+    provides time zone information for the standard Daylight Saving offsets: 
+ 
+    .. testsetup:: tzfile 
+ 
+        from dateutil.tz import gettz 
+        from datetime import datetime 
+ 
+    .. doctest:: tzfile 
+ 
+        >>> NYC = gettz('America/New_York') 
+        >>> NYC 
+        tzfile('/usr/share/zoneinfo/America/New_York') 
+ 
+        >>> print(datetime(2016, 1, 3, tzinfo=NYC))     # EST 
+        2016-01-03 00:00:00-05:00 
+ 
+        >>> print(datetime(2016, 7, 7, tzinfo=NYC))     # EDT 
+        2016-07-07 00:00:00-04:00 
+ 
+ 
+    The ``tzfile`` structure contains a fully history of the time zone, 
+    so historical dates will also have the right offsets. For example, before 
+    the adoption of the UTC standards, New York used local solar  mean time: 
+ 
+    .. doctest:: tzfile 
+ 
+       >>> print(datetime(1901, 4, 12, tzinfo=NYC))    # LMT 
+       1901-04-12 00:00:00-04:56 
+ 
+    And during World War II, New York was on "Eastern War Time", which was a 
+    state of permanent daylight saving time: 
+ 
+    .. doctest:: tzfile 
+ 
+        >>> print(datetime(1944, 2, 7, tzinfo=NYC))    # EWT 
+        1944-02-07 00:00:00-04:00 
+ 
     """
 
     def __init__(self, fileobj, filename=None):
@@ -549,7 +549,7 @@ class tzfile(_tzinfo):
 
         if timecnt:
             out.trans_idx = struct.unpack(">%dB" % timecnt,
-                                          fileobj.read(timecnt))
+                                          fileobj.read(timecnt)) 
         else:
             out.trans_idx = []
 
@@ -722,7 +722,7 @@ class tzfile(_tzinfo):
         idx = bisect.bisect_right(trans_list, timestamp)
 
         # We want to know when the previous transition was, so subtract off 1
-        return idx - 1
+        return idx - 1 
 
     def _get_ttinfo(self, idx):
         # For no list or after the last transition, default to _ttinfo_std
@@ -906,9 +906,9 @@ class tzrange(tzrangebase):
 
     :param start:
         A :class:`relativedelta.relativedelta` object or equivalent specifying
-        the time and time of year that daylight savings time starts. To
-        specify, for example, that DST starts at 2AM on the 2nd Sunday in
-        March, pass:
+        the time and time of year that daylight savings time starts. To 
+        specify, for example, that DST starts at 2AM on the 2nd Sunday in 
+        March, pass: 
 
             ``relativedelta(hours=2, month=3, day=1, weekday=SU(+2))``
 
@@ -916,12 +916,12 @@ class tzrange(tzrangebase):
         value is 2 AM on the first Sunday in April.
 
     :param end:
-        A :class:`relativedelta.relativedelta` object or equivalent
-        representing the time and time of year that daylight savings time
-        ends, with the same specification method as in ``start``. One note is
-        that this should point to the first time in the *standard* zone, so if
-        a transition occurs at 2AM in the DST zone and the clocks are set back
-        1 hour to 1AM, set the ``hours`` parameter to +1.
+        A :class:`relativedelta.relativedelta` object or equivalent 
+        representing the time and time of year that daylight savings time 
+        ends, with the same specification method as in ``start``. One note is 
+        that this should point to the first time in the *standard* zone, so if 
+        a transition occurs at 2AM in the DST zone and the clocks are set back 
+        1 hour to 1AM, set the ``hours`` parameter to +1. 
 
 
     **Examples:**
@@ -957,12 +957,12 @@ class tzrange(tzrangebase):
         self._dst_abbr = dstabbr
 
         try:
-            stdoffset = stdoffset.total_seconds()
+            stdoffset = stdoffset.total_seconds() 
         except (TypeError, AttributeError):
             pass
 
         try:
-            dstoffset = dstoffset.total_seconds()
+            dstoffset = dstoffset.total_seconds() 
         except (TypeError, AttributeError):
             pass
 
@@ -1033,7 +1033,7 @@ class tzrange(tzrangebase):
         return self._dst_base_offset_
 
 
-@six.add_metaclass(_TzStrFactory)
+@six.add_metaclass(_TzStrFactory) 
 class tzstr(tzrange):
     """
     ``tzstr`` objects are time zone objects specified by a time-zone string as
@@ -1052,38 +1052,38 @@ class tzstr(tzrange):
 
     :param s:
         A time zone string in ``TZ`` variable format. This can be a
-        :class:`bytes` (2.x: :class:`str`), :class:`str` (2.x:
-        :class:`unicode`) or a stream emitting unicode characters
-        (e.g. :class:`StringIO`).
+        :class:`bytes` (2.x: :class:`str`), :class:`str` (2.x: 
+        :class:`unicode`) or a stream emitting unicode characters 
+        (e.g. :class:`StringIO`). 
 
     :param posix_offset:
         Optional. If set to ``True``, interpret strings such as ``GMT+3`` or
         ``UTC+3`` as being 3 hours *behind* UTC rather than ahead, per the
         POSIX standard.
 
-    .. caution::
-
-        Prior to version 2.7.0, this function also supported time zones
-        in the format:
-
-            * ``EST5EDT,4,0,6,7200,10,0,26,7200,3600``
-            * ``EST5EDT,4,1,0,7200,10,-1,0,7200,3600``
-
-        This format is non-standard and has been deprecated; this function
-        will raise a :class:`DeprecatedTZFormatWarning` until
-        support is removed in a future version.
-
+    .. caution:: 
+ 
+        Prior to version 2.7.0, this function also supported time zones 
+        in the format: 
+ 
+            * ``EST5EDT,4,0,6,7200,10,0,26,7200,3600`` 
+            * ``EST5EDT,4,1,0,7200,10,-1,0,7200,3600`` 
+ 
+        This format is non-standard and has been deprecated; this function 
+        will raise a :class:`DeprecatedTZFormatWarning` until 
+        support is removed in a future version. 
+ 
     .. _`GNU C Library: TZ Variable`:
         https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
     """
     def __init__(self, s, posix_offset=False):
         global parser
-        from dateutil.parser import _parser as parser
+        from dateutil.parser import _parser as parser 
 
         self._s = s
 
         res = parser._parsetz(s)
-        if res is None or res.any_unused_tokens:
+        if res is None or res.any_unused_tokens: 
             raise ValueError("unknown string format")
 
         # Here we break the compatibility with the TZ variable handling.
@@ -1172,7 +1172,7 @@ class _tzicalvtz(_tzinfo):
         self._comps = comps
         self._cachedate = []
         self._cachecomp = []
-        self._cache_lock = _thread.allocate_lock()
+        self._cache_lock = _thread.allocate_lock() 
 
     def _find_comp(self, dt):
         if len(self._comps) == 1:
@@ -1181,9 +1181,9 @@ class _tzicalvtz(_tzinfo):
         dt = dt.replace(tzinfo=None)
 
         try:
-            with self._cache_lock:
-                return self._cachecomp[self._cachedate.index(
-                    (dt, self._fold(dt)))]
+            with self._cache_lock: 
+                return self._cachecomp[self._cachedate.index( 
+                    (dt, self._fold(dt)))] 
         except ValueError:
             pass
 
@@ -1209,13 +1209,13 @@ class _tzicalvtz(_tzinfo):
             else:
                 lastcomp = comp[0]
 
-        with self._cache_lock:
-            self._cachedate.insert(0, (dt, self._fold(dt)))
-            self._cachecomp.insert(0, lastcomp)
+        with self._cache_lock: 
+            self._cachedate.insert(0, (dt, self._fold(dt))) 
+            self._cachecomp.insert(0, lastcomp) 
 
-            if len(self._cachedate) > 10:
-                self._cachedate.pop()
-                self._cachecomp.pop()
+            if len(self._cachedate) > 10: 
+                self._cachedate.pop() 
+                self._cachecomp.pop() 
 
         return lastcomp
 
@@ -1253,13 +1253,13 @@ class _tzicalvtz(_tzinfo):
 class tzical(object):
     """
     This object is designed to parse an iCalendar-style ``VTIMEZONE`` structure
-    as set out in `RFC 5545`_ Section 4.6.5 into one or more `tzinfo` objects.
+    as set out in `RFC 5545`_ Section 4.6.5 into one or more `tzinfo` objects. 
 
     :param `fileobj`:
         A file or stream in iCalendar format, which should be UTF-8 encoded
         with CRLF endings.
 
-    .. _`RFC 5545`: https://tools.ietf.org/html/rfc5545
+    .. _`RFC 5545`: https://tools.ietf.org/html/rfc5545 
     """
     def __init__(self, fileobj):
         global rrule
@@ -1407,13 +1407,13 @@ class tzical(object):
                         raise ValueError("invalid component end: "+value)
                 elif comptype:
                     if name == "DTSTART":
-                        # DTSTART in VTIMEZONE takes a subset of valid RRULE
-                        # values under RFC 5545.
-                        for parm in parms:
-                            if parm != 'VALUE=DATE-TIME':
-                                msg = ('Unsupported DTSTART param in ' +
-                                       'VTIMEZONE: ' + parm)
-                                raise ValueError(msg)
+                        # DTSTART in VTIMEZONE takes a subset of valid RRULE 
+                        # values under RFC 5545. 
+                        for parm in parms: 
+                            if parm != 'VALUE=DATE-TIME': 
+                                msg = ('Unsupported DTSTART param in ' + 
+                                       'VTIMEZONE: ' + parm) 
+                                raise ValueError(msg) 
                         rrulelines.append(line)
                         founddtstart = True
                     elif name in ("RRULE", "RDATE", "EXRULE", "EXDATE"):
@@ -1467,153 +1467,153 @@ else:
     TZPATHS = []
 
 
-def __get_gettz():
-    tzlocal_classes = (tzlocal,)
-    if tzwinlocal is not None:
-        tzlocal_classes += (tzwinlocal,)
-
-    class GettzFunc(object):
-        """
-        Retrieve a time zone object from a string representation
-
-        This function is intended to retrieve the :py:class:`tzinfo` subclass
-        that best represents the time zone that would be used if a POSIX
-        `TZ variable`_ were set to the same value.
-
-        If no argument or an empty string is passed to ``gettz``, local time
-        is returned:
-
-        .. code-block:: python3
-
-            >>> gettz()
-            tzfile('/etc/localtime')
-
-        This function is also the preferred way to map IANA tz database keys
-        to :class:`tzfile` objects:
-
-        .. code-block:: python3
-
-            >>> gettz('Pacific/Kiritimati')
-            tzfile('/usr/share/zoneinfo/Pacific/Kiritimati')
-
-        On Windows, the standard is extended to include the Windows-specific
-        zone names provided by the operating system:
-
-        .. code-block:: python3
-
-            >>> gettz('Egypt Standard Time')
-            tzwin('Egypt Standard Time')
-
-        Passing a GNU ``TZ`` style string time zone specification returns a
-        :class:`tzstr` object:
-
-        .. code-block:: python3
-
-            >>> gettz('AEST-10AEDT-11,M10.1.0/2,M4.1.0/3')
-            tzstr('AEST-10AEDT-11,M10.1.0/2,M4.1.0/3')
-
-        :param name:
-            A time zone name (IANA, or, on Windows, Windows keys), location of
-            a ``tzfile(5)`` zoneinfo file or ``TZ`` variable style time zone
-            specifier. An empty string, no argument or ``None`` is interpreted
-            as local time.
-
-        :return:
-            Returns an instance of one of ``dateutil``'s :py:class:`tzinfo`
-            subclasses.
-
-        .. versionchanged:: 2.7.0
-
-            After version 2.7.0, any two calls to ``gettz`` using the same
-            input strings will return the same object:
-
-            .. code-block:: python3
-
-                >>> tz.gettz('America/Chicago') is tz.gettz('America/Chicago')
-                True
-
-            In addition to improving performance, this ensures that
-            `"same zone" semantics`_ are used for datetimes in the same zone.
-
-
-        .. _`TZ variable`:
-            https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
-
-        .. _`"same zone" semantics`:
-            https://blog.ganssle.io/articles/2018/02/aware-datetime-arithmetic.html
-        """
-        def __init__(self):
-
+def __get_gettz(): 
+    tzlocal_classes = (tzlocal,) 
+    if tzwinlocal is not None: 
+        tzlocal_classes += (tzwinlocal,) 
+ 
+    class GettzFunc(object): 
+        """ 
+        Retrieve a time zone object from a string representation 
+ 
+        This function is intended to retrieve the :py:class:`tzinfo` subclass 
+        that best represents the time zone that would be used if a POSIX 
+        `TZ variable`_ were set to the same value. 
+ 
+        If no argument or an empty string is passed to ``gettz``, local time 
+        is returned: 
+ 
+        .. code-block:: python3 
+ 
+            >>> gettz() 
+            tzfile('/etc/localtime') 
+ 
+        This function is also the preferred way to map IANA tz database keys 
+        to :class:`tzfile` objects: 
+ 
+        .. code-block:: python3 
+ 
+            >>> gettz('Pacific/Kiritimati') 
+            tzfile('/usr/share/zoneinfo/Pacific/Kiritimati') 
+ 
+        On Windows, the standard is extended to include the Windows-specific 
+        zone names provided by the operating system: 
+ 
+        .. code-block:: python3 
+ 
+            >>> gettz('Egypt Standard Time') 
+            tzwin('Egypt Standard Time') 
+ 
+        Passing a GNU ``TZ`` style string time zone specification returns a 
+        :class:`tzstr` object: 
+ 
+        .. code-block:: python3 
+ 
+            >>> gettz('AEST-10AEDT-11,M10.1.0/2,M4.1.0/3') 
+            tzstr('AEST-10AEDT-11,M10.1.0/2,M4.1.0/3') 
+ 
+        :param name: 
+            A time zone name (IANA, or, on Windows, Windows keys), location of 
+            a ``tzfile(5)`` zoneinfo file or ``TZ`` variable style time zone 
+            specifier. An empty string, no argument or ``None`` is interpreted 
+            as local time. 
+ 
+        :return: 
+            Returns an instance of one of ``dateutil``'s :py:class:`tzinfo` 
+            subclasses. 
+ 
+        .. versionchanged:: 2.7.0 
+ 
+            After version 2.7.0, any two calls to ``gettz`` using the same 
+            input strings will return the same object: 
+ 
+            .. code-block:: python3 
+ 
+                >>> tz.gettz('America/Chicago') is tz.gettz('America/Chicago') 
+                True 
+ 
+            In addition to improving performance, this ensures that 
+            `"same zone" semantics`_ are used for datetimes in the same zone. 
+ 
+ 
+        .. _`TZ variable`: 
+            https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html 
+ 
+        .. _`"same zone" semantics`: 
+            https://blog.ganssle.io/articles/2018/02/aware-datetime-arithmetic.html 
+        """ 
+        def __init__(self): 
+ 
             self.__instances = weakref.WeakValueDictionary()
             self.__strong_cache_size = 8
             self.__strong_cache = OrderedDict()
-            self._cache_lock = _thread.allocate_lock()
-
-        def __call__(self, name=None):
-            with self._cache_lock:
-                rv = self.__instances.get(name, None)
-
-                if rv is None:
-                    rv = self.nocache(name=name)
+            self._cache_lock = _thread.allocate_lock() 
+ 
+        def __call__(self, name=None): 
+            with self._cache_lock: 
+                rv = self.__instances.get(name, None) 
+ 
+                if rv is None: 
+                    rv = self.nocache(name=name) 
                     if not (name is None
                             or isinstance(rv, tzlocal_classes)
                             or rv is None):
-                        # tzlocal is slightly more complicated than the other
-                        # time zone providers because it depends on environment
-                        # at construction time, so don't cache that.
+                        # tzlocal is slightly more complicated than the other 
+                        # time zone providers because it depends on environment 
+                        # at construction time, so don't cache that. 
                         #
                         # We also cannot store weak references to None, so we
                         # will also not store that.
-                        self.__instances[name] = rv
+                        self.__instances[name] = rv 
                     else:
                         # No need for strong caching, return immediately
                         return rv
-
+ 
                 self.__strong_cache[name] = self.__strong_cache.pop(name, rv)
 
                 if len(self.__strong_cache) > self.__strong_cache_size:
                     self.__strong_cache.popitem(last=False)
 
-            return rv
-
+            return rv 
+ 
         def set_cache_size(self, size):
             with self._cache_lock:
                 self.__strong_cache_size = size
                 while len(self.__strong_cache) > size:
                     self.__strong_cache.popitem(last=False)
 
-        def cache_clear(self):
-            with self._cache_lock:
+        def cache_clear(self): 
+            with self._cache_lock: 
                 self.__instances = weakref.WeakValueDictionary()
                 self.__strong_cache.clear()
-
-        @staticmethod
-        def nocache(name=None):
-            """A non-cached version of gettz"""
-            tz = None
-            if not name:
-                try:
-                    name = os.environ["TZ"]
-                except KeyError:
-                    pass
+ 
+        @staticmethod 
+        def nocache(name=None): 
+            """A non-cached version of gettz""" 
+            tz = None 
+            if not name: 
+                try: 
+                    name = os.environ["TZ"] 
+                except KeyError: 
+                    pass 
             if name is None or name in ("", ":"):
-                for filepath in TZFILES:
-                    if not os.path.isabs(filepath):
-                        filename = filepath
-                        for path in TZPATHS:
-                            filepath = os.path.join(path, filename)
-                            if os.path.isfile(filepath):
-                                break
-                        else:
-                            continue
-                    if os.path.isfile(filepath):
-                        try:
-                            tz = tzfile(filepath)
-                            break
-                        except (IOError, OSError, ValueError):
-                            pass
-                else:
-                    tz = tzlocal()
+                for filepath in TZFILES: 
+                    if not os.path.isabs(filepath): 
+                        filename = filepath 
+                        for path in TZPATHS: 
+                            filepath = os.path.join(path, filename) 
+                            if os.path.isfile(filepath): 
+                                break 
+                        else: 
+                            continue 
+                    if os.path.isfile(filepath): 
+                        try: 
+                            tz = tzfile(filepath) 
+                            break 
+                        except (IOError, OSError, ValueError): 
+                            pass 
+                else: 
+                    tz = tzlocal() 
             else:
                 try:
                     if name.startswith(":"):
@@ -1624,62 +1624,62 @@ def __get_gettz():
                         six.raise_from(TypeError(new_msg), e)
                     else:
                         raise
-                if os.path.isabs(name):
-                    if os.path.isfile(name):
-                        tz = tzfile(name)
-                    else:
+                if os.path.isabs(name): 
+                    if os.path.isfile(name): 
+                        tz = tzfile(name) 
+                    else: 
                         tz = None
-                else:
-                    for path in TZPATHS:
-                        filepath = os.path.join(path, name)
-                        if not os.path.isfile(filepath):
-                            filepath = filepath.replace(' ', '_')
-                            if not os.path.isfile(filepath):
-                                continue
-                        try:
-                            tz = tzfile(filepath)
+                else: 
+                    for path in TZPATHS: 
+                        filepath = os.path.join(path, name) 
+                        if not os.path.isfile(filepath): 
+                            filepath = filepath.replace(' ', '_') 
+                            if not os.path.isfile(filepath): 
+                                continue 
+                        try: 
+                            tz = tzfile(filepath) 
                             break
-                        except (IOError, OSError, ValueError):
-                            pass
+                        except (IOError, OSError, ValueError): 
+                            pass 
                     else:
-                        tz = None
-                        if tzwin is not None:
-                            try:
-                                tz = tzwin(name)
+                        tz = None 
+                        if tzwin is not None: 
+                            try: 
+                                tz = tzwin(name) 
                             except (WindowsError, UnicodeEncodeError):
                                 # UnicodeEncodeError is for Python 2.7 compat
-                                tz = None
-
-                        if not tz:
-                            from dateutil.zoneinfo import get_zonefile_instance
-                            tz = get_zonefile_instance().get(name)
-
-                        if not tz:
-                            for c in name:
-                                # name is not a tzstr unless it has at least
-                                # one offset. For short values of "name", an
-                                # explicit for loop seems to be the fastest way
-                                # To determine if a string contains a digit
-                                if c in "0123456789":
-                                    try:
-                                        tz = tzstr(name)
-                                    except ValueError:
-                                        pass
-                                    break
-                            else:
-                                if name in ("GMT", "UTC"):
+                                tz = None 
+
+                        if not tz: 
+                            from dateutil.zoneinfo import get_zonefile_instance 
+                            tz = get_zonefile_instance().get(name) 
+
+                        if not tz: 
+                            for c in name: 
+                                # name is not a tzstr unless it has at least 
+                                # one offset. For short values of "name", an 
+                                # explicit for loop seems to be the fastest way 
+                                # To determine if a string contains a digit 
+                                if c in "0123456789": 
+                                    try: 
+                                        tz = tzstr(name) 
+                                    except ValueError: 
+                                        pass 
+                                    break 
+                            else: 
+                                if name in ("GMT", "UTC"): 
                                     tz = UTC
-                                elif name in time.tzname:
-                                    tz = tzlocal()
-            return tz
-
-    return GettzFunc()
-
-
-gettz = __get_gettz()
-del __get_gettz
-
-
+                                elif name in time.tzname: 
+                                    tz = tzlocal() 
+            return tz 
+ 
+    return GettzFunc() 
+ 
+ 
+gettz = __get_gettz() 
+del __get_gettz 
+ 
+ 
 def datetime_exists(dt, tz=None):
     """
     Given a datetime and a time zone, determine whether or not a given datetime
@@ -1694,10 +1694,10 @@ def datetime_exists(dt, tz=None):
         ``None`` or not provided, the datetime's own time zone will be used.
 
     :return:
-        Returns a boolean value whether or not the "wall time" exists in
-        ``tz``.
-
-    .. versionadded:: 2.7.0
+        Returns a boolean value whether or not the "wall time" exists in 
+        ``tz``. 
+ 
+    .. versionadded:: 2.7.0 
     """
     if tz is None:
         if dt.tzinfo is None:
@@ -1745,7 +1745,7 @@ def datetime_ambiguous(dt, tz=None):
     if is_ambiguous_fn is not None:
         try:
             return tz.is_ambiguous(dt)
-        except Exception:
+        except Exception: 
             pass
 
     # If it doesn't come out and tell us it's ambiguous, we'll just check if
@@ -1760,58 +1760,58 @@ def datetime_ambiguous(dt, tz=None):
     return not (same_offset and same_dst)
 
 
-def resolve_imaginary(dt):
-    """
-    Given a datetime that may be imaginary, return an existing datetime.
-
-    This function assumes that an imaginary datetime represents what the
-    wall time would be in a zone had the offset transition not occurred, so
-    it will always fall forward by the transition's change in offset.
-
-    .. doctest::
-
-        >>> from dateutil import tz
-        >>> from datetime import datetime
-        >>> NYC = tz.gettz('America/New_York')
-        >>> print(tz.resolve_imaginary(datetime(2017, 3, 12, 2, 30, tzinfo=NYC)))
-        2017-03-12 03:30:00-04:00
-
-        >>> KIR = tz.gettz('Pacific/Kiritimati')
-        >>> print(tz.resolve_imaginary(datetime(1995, 1, 1, 12, 30, tzinfo=KIR)))
-        1995-01-02 12:30:00+14:00
-
-    As a note, :func:`datetime.astimezone` is guaranteed to produce a valid,
-    existing datetime, so a round-trip to and from UTC is sufficient to get
-    an extant datetime, however, this generally "falls back" to an earlier time
-    rather than falling forward to the STD side (though no guarantees are made
-    about this behavior).
-
-    :param dt:
-        A :class:`datetime.datetime` which may or may not exist.
-
-    :return:
-        Returns an existing :class:`datetime.datetime`. If ``dt`` was not
-        imaginary, the datetime returned is guaranteed to be the same object
-        passed to the function.
-
-    .. versionadded:: 2.7.0
-    """
-    if dt.tzinfo is not None and not datetime_exists(dt):
-
-        curr_offset = (dt + datetime.timedelta(hours=24)).utcoffset()
-        old_offset = (dt - datetime.timedelta(hours=24)).utcoffset()
-
-        dt += curr_offset - old_offset
-
-    return dt
-
-
+def resolve_imaginary(dt): 
+    """ 
+    Given a datetime that may be imaginary, return an existing datetime. 
+ 
+    This function assumes that an imaginary datetime represents what the 
+    wall time would be in a zone had the offset transition not occurred, so 
+    it will always fall forward by the transition's change in offset. 
+ 
+    .. doctest:: 
+ 
+        >>> from dateutil import tz 
+        >>> from datetime import datetime 
+        >>> NYC = tz.gettz('America/New_York') 
+        >>> print(tz.resolve_imaginary(datetime(2017, 3, 12, 2, 30, tzinfo=NYC))) 
+        2017-03-12 03:30:00-04:00 
+ 
+        >>> KIR = tz.gettz('Pacific/Kiritimati') 
+        >>> print(tz.resolve_imaginary(datetime(1995, 1, 1, 12, 30, tzinfo=KIR))) 
+        1995-01-02 12:30:00+14:00 
+ 
+    As a note, :func:`datetime.astimezone` is guaranteed to produce a valid, 
+    existing datetime, so a round-trip to and from UTC is sufficient to get 
+    an extant datetime, however, this generally "falls back" to an earlier time 
+    rather than falling forward to the STD side (though no guarantees are made 
+    about this behavior). 
+ 
+    :param dt: 
+        A :class:`datetime.datetime` which may or may not exist. 
+ 
+    :return: 
+        Returns an existing :class:`datetime.datetime`. If ``dt`` was not 
+        imaginary, the datetime returned is guaranteed to be the same object 
+        passed to the function. 
+ 
+    .. versionadded:: 2.7.0 
+    """ 
+    if dt.tzinfo is not None and not datetime_exists(dt): 
+ 
+        curr_offset = (dt + datetime.timedelta(hours=24)).utcoffset() 
+        old_offset = (dt - datetime.timedelta(hours=24)).utcoffset() 
+ 
+        dt += curr_offset - old_offset 
+ 
+    return dt 
+ 
+ 
 def _datetime_to_timestamp(dt):
     """
-    Convert a :class:`datetime.datetime` object to an epoch timestamp in
-    seconds since January 1, 1970, ignoring the time zone.
+    Convert a :class:`datetime.datetime` object to an epoch timestamp in 
+    seconds since January 1, 1970, ignoring the time zone. 
     """
-    return (dt.replace(tzinfo=None) - EPOCH).total_seconds()
+    return (dt.replace(tzinfo=None) - EPOCH).total_seconds() 
 
 
 if sys.version_info >= (3, 6):
diff --git a/contrib/python/dateutil/dateutil/utils.py b/contrib/python/dateutil/dateutil/utils.py
index dd2d245a0b..a6848ba625 100644
--- a/contrib/python/dateutil/dateutil/utils.py
+++ b/contrib/python/dateutil/dateutil/utils.py
@@ -1,71 +1,71 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers general convenience and utility functions for dealing with
-datetimes.
-
-.. versionadded:: 2.7.0
-"""
-from __future__ import unicode_literals
-
-from datetime import datetime, time
-
-
-def today(tzinfo=None):
-    """
-    Returns a :py:class:`datetime` representing the current day at midnight
-
-    :param tzinfo:
-        The time zone to attach (also used to determine the current day).
-
-    :return:
-        A :py:class:`datetime.datetime` object representing the current day
-        at midnight.
-    """
-
-    dt = datetime.now(tzinfo)
-    return datetime.combine(dt.date(), time(0, tzinfo=tzinfo))
-
-
-def default_tzinfo(dt, tzinfo):
-    """
+# -*- coding: utf-8 -*- 
+""" 
+This module offers general convenience and utility functions for dealing with 
+datetimes. 
+ 
+.. versionadded:: 2.7.0 
+""" 
+from __future__ import unicode_literals 
+ 
+from datetime import datetime, time 
+ 
+ 
+def today(tzinfo=None): 
+    """ 
+    Returns a :py:class:`datetime` representing the current day at midnight 
+ 
+    :param tzinfo: 
+        The time zone to attach (also used to determine the current day). 
+ 
+    :return: 
+        A :py:class:`datetime.datetime` object representing the current day 
+        at midnight. 
+    """ 
+ 
+    dt = datetime.now(tzinfo) 
+    return datetime.combine(dt.date(), time(0, tzinfo=tzinfo)) 
+ 
+ 
+def default_tzinfo(dt, tzinfo): 
+    """ 
     Sets the ``tzinfo`` parameter on naive datetimes only
-
-    This is useful for example when you are provided a datetime that may have
-    either an implicit or explicit time zone, such as when parsing a time zone
-    string.
-
-    .. doctest::
-
-        >>> from dateutil.tz import tzoffset
-        >>> from dateutil.parser import parse
-        >>> from dateutil.utils import default_tzinfo
-        >>> dflt_tz = tzoffset("EST", -18000)
-        >>> print(default_tzinfo(parse('2014-01-01 12:30 UTC'), dflt_tz))
-        2014-01-01 12:30:00+00:00
-        >>> print(default_tzinfo(parse('2014-01-01 12:30'), dflt_tz))
-        2014-01-01 12:30:00-05:00
-
-    :param dt:
-        The datetime on which to replace the time zone
-
-    :param tzinfo:
-        The :py:class:`datetime.tzinfo` subclass instance to assign to
-        ``dt`` if (and only if) it is naive.
-
-    :return:
-        Returns an aware :py:class:`datetime.datetime`.
-    """
-    if dt.tzinfo is not None:
-        return dt
-    else:
-        return dt.replace(tzinfo=tzinfo)
-
-
-def within_delta(dt1, dt2, delta):
-    """
+ 
+    This is useful for example when you are provided a datetime that may have 
+    either an implicit or explicit time zone, such as when parsing a time zone 
+    string. 
+ 
+    .. doctest:: 
+ 
+        >>> from dateutil.tz import tzoffset 
+        >>> from dateutil.parser import parse 
+        >>> from dateutil.utils import default_tzinfo 
+        >>> dflt_tz = tzoffset("EST", -18000) 
+        >>> print(default_tzinfo(parse('2014-01-01 12:30 UTC'), dflt_tz)) 
+        2014-01-01 12:30:00+00:00 
+        >>> print(default_tzinfo(parse('2014-01-01 12:30'), dflt_tz)) 
+        2014-01-01 12:30:00-05:00 
+ 
+    :param dt: 
+        The datetime on which to replace the time zone 
+ 
+    :param tzinfo: 
+        The :py:class:`datetime.tzinfo` subclass instance to assign to 
+        ``dt`` if (and only if) it is naive. 
+ 
+    :return: 
+        Returns an aware :py:class:`datetime.datetime`. 
+    """ 
+    if dt.tzinfo is not None: 
+        return dt 
+    else: 
+        return dt.replace(tzinfo=tzinfo) 
+ 
+ 
+def within_delta(dt1, dt2, delta): 
+    """ 
     Useful for comparing two datetimes that may have a negligible difference
-    to be considered equal.
-    """
-    delta = abs(delta)
-    difference = dt1 - dt2
-    return -delta <= difference <= delta
+    to be considered equal. 
+    """ 
+    delta = abs(delta) 
+    difference = dt1 - dt2 
+    return -delta <= difference <= delta 
diff --git a/contrib/python/dateutil/dateutil/zoneinfo/__init__.py b/contrib/python/dateutil/dateutil/zoneinfo/__init__.py
index 34f11ad66c..30d8feff16 100644
--- a/contrib/python/dateutil/dateutil/zoneinfo/__init__.py
+++ b/contrib/python/dateutil/dateutil/zoneinfo/__init__.py
@@ -6,15 +6,15 @@ from tarfile import TarFile
 from pkgutil import get_data
 from io import BytesIO
 
-from dateutil.tz import tzfile as _tzfile
+from dateutil.tz import tzfile as _tzfile 
 
-__all__ = ["get_zonefile_instance", "gettz", "gettz_db_metadata"]
+__all__ = ["get_zonefile_instance", "gettz", "gettz_db_metadata"] 
 
 ZONEFILENAME = "dateutil-zoneinfo.tar.gz"
 METADATA_FN = 'METADATA'
 
 
-class tzfile(_tzfile):
+class tzfile(_tzfile): 
     def __reduce__(self):
         return (gettz, (self._filename,))
 
@@ -30,15 +30,15 @@ def getzoneinfofile_stream():
 class ZoneInfoFile(object):
     def __init__(self, zonefile_stream=None):
         if zonefile_stream is not None:
-            with TarFile.open(fileobj=zonefile_stream) as tf:
-                self.zones = {zf.name: tzfile(tf.extractfile(zf), filename=zf.name)
-                              for zf in tf.getmembers()
-                              if zf.isfile() and zf.name != METADATA_FN}
+            with TarFile.open(fileobj=zonefile_stream) as tf: 
+                self.zones = {zf.name: tzfile(tf.extractfile(zf), filename=zf.name) 
+                              for zf in tf.getmembers() 
+                              if zf.isfile() and zf.name != METADATA_FN} 
                 # deal with links: They'll point to their parent object. Less
                 # waste of memory
-                links = {zl.name: self.zones[zl.linkname]
-                         for zl in tf.getmembers() if
-                         zl.islnk() or zl.issym()}
+                links = {zl.name: self.zones[zl.linkname] 
+                         for zl in tf.getmembers() if 
+                         zl.islnk() or zl.issym()} 
                 self.zones.update(links)
                 try:
                     metadata_json = tf.extractfile(tf.getmember(METADATA_FN))
@@ -48,7 +48,7 @@ class ZoneInfoFile(object):
                     # no metadata in tar file
                     self.metadata = None
         else:
-            self.zones = {}
+            self.zones = {} 
             self.metadata = None
 
     def get(self, name, default=None):
@@ -74,7 +74,7 @@ class ZoneInfoFile(object):
 # timezone. Ugly, but adheres to the api.
 #
 # TODO: Remove after deprecation period.
-_CLASS_ZONE_INSTANCE = []
+_CLASS_ZONE_INSTANCE = [] 
 
 
 def get_zonefile_instance(new_instance=False):
diff --git a/contrib/python/dateutil/dateutil/zoneinfo/rebuild.py b/contrib/python/dateutil/dateutil/zoneinfo/rebuild.py
index 684c6586f0..42089d57a2 100644
--- a/contrib/python/dateutil/dateutil/zoneinfo/rebuild.py
+++ b/contrib/python/dateutil/dateutil/zoneinfo/rebuild.py
@@ -4,22 +4,22 @@ import tempfile
 import shutil
 import json
 from subprocess import check_call, check_output
-from tarfile import TarFile
+from tarfile import TarFile 
 
-from dateutil.zoneinfo import METADATA_FN, ZONEFILENAME
+from dateutil.zoneinfo import METADATA_FN, ZONEFILENAME 
 
 
 def rebuild(filename, tag=None, format="gz", zonegroups=[], metadata=None):
     """Rebuild the internal timezone info in dateutil/zoneinfo/zoneinfo*tar*
 
-    filename is the timezone tarball from ``ftp.iana.org/tz``.
+    filename is the timezone tarball from ``ftp.iana.org/tz``. 
 
     """
     tmpdir = tempfile.mkdtemp()
     zonedir = os.path.join(tmpdir, "zoneinfo")
     moduledir = os.path.dirname(__file__)
     try:
-        with TarFile.open(filename) as tf:
+        with TarFile.open(filename) as tf: 
             for name in zonegroups:
                 tf.extract(name, tmpdir)
             filepaths = [os.path.join(tmpdir, n) for n in zonegroups]
@@ -30,7 +30,7 @@ def rebuild(filename, tag=None, format="gz", zonegroups=[], metadata=None):
         with open(os.path.join(zonedir, METADATA_FN), 'w') as f:
             json.dump(metadata, f, indent=4, sort_keys=True)
         target = os.path.join(moduledir, ZONEFILENAME)
-        with TarFile.open(target, "w:%s" % format) as tf:
+        with TarFile.open(target, "w:%s" % format) as tf: 
             for entry in os.listdir(zonedir):
                 entrypath = os.path.join(zonedir, entry)
                 tf.add(entrypath, entry)
diff --git a/contrib/python/dateutil/tests/ya.make b/contrib/python/dateutil/tests/ya.make
index 93c811e26e..11fbc851ad 100644
--- a/contrib/python/dateutil/tests/ya.make
+++ b/contrib/python/dateutil/tests/ya.make
@@ -1,7 +1,7 @@
 PY23_TEST()
 
 OWNER(g:python-contrib)
-
+ 
 PEERDIR(
     contrib/python/dateutil
     contrib/python/freezegun
diff --git a/contrib/python/dateutil/ya.make b/contrib/python/dateutil/ya.make
index 0c4102c505..4a94ea5b1b 100644
--- a/contrib/python/dateutil/ya.make
+++ b/contrib/python/dateutil/ya.make
@@ -5,7 +5,7 @@ PY23_LIBRARY()
 OWNER(g:python-contrib)
 
 VERSION(2.8.2)
-
+ 
 LICENSE(BSD-3-Clause)
 
 PEERDIR(
@@ -25,18 +25,18 @@ PY_SRCS(
     dateutil/_common.py
     dateutil/_version.py
     dateutil/easter.py
-    dateutil/parser/__init__.py
-    dateutil/parser/_parser.py
-    dateutil/parser/isoparser.py
+    dateutil/parser/__init__.py 
+    dateutil/parser/_parser.py 
+    dateutil/parser/isoparser.py 
     dateutil/relativedelta.py
     dateutil/rrule.py
     dateutil/tz/__init__.py
     dateutil/tz/_common.py
-    dateutil/tz/_factories.py
+    dateutil/tz/_factories.py 
     dateutil/tz/tz.py
     dateutil/tz/win.py
     dateutil/tzwin.py
-    dateutil/utils.py
+    dateutil/utils.py 
     dateutil/zoneinfo/__init__.py
     dateutil/zoneinfo/rebuild.py
 )
@@ -46,8 +46,8 @@ RESOURCE_FILES(
     .dist-info/METADATA
     .dist-info/top_level.txt
     dateutil/zoneinfo/dateutil-zoneinfo.tar.gz
-)
-
+) 
+ 
 END()
 
 RECURSE_FOR_TESTS(
diff --git a/contrib/python/ya.make b/contrib/python/ya.make
index d01ced9f3a..69e0e13fa9 100644
--- a/contrib/python/ya.make
+++ b/contrib/python/ya.make
@@ -42,7 +42,7 @@ RECURSE(
     aiozipkin
     aiozk
     alabaster
-    alembic
+    alembic 
     allpairspy
     amqp
     aniso8601
@@ -53,7 +53,7 @@ RECURSE(
     anyio
     anytree
     apipkg
-    apispec
+    apispec 
     apispec-flask-restful
     appdirs
     APScheduler
@@ -127,7 +127,7 @@ RECURSE(
     bsddb3
     bson
     bz2file
-    cached-property
+    cached-property 
     cachelib
     cachetools
     catalogue
@@ -174,8 +174,8 @@ RECURSE(
     contextdecorator
     contextlib2
     convertdate
-    cookies
-    cov-core
+    cookies 
+    cov-core 
     coverage
     coverage/bin
     cpu-cores
@@ -192,7 +192,7 @@ RECURSE(
     cytoolz
     czipfile
     daphne
-    dask
+    dask 
     daphne
     databases
     dataclasses-json
@@ -355,13 +355,13 @@ RECURSE(
     Faker
     fakeredis
     falcon
-    falcon-cors
+    falcon-cors 
     falcon-multipart
-    fallocate
+    fallocate 
     fancycompleter
     fastapi
     fastapi-utils
-    fastdtw
+    fastdtw 
     fasteners
     fastjsonschema
     fastsnmp
@@ -416,14 +416,14 @@ RECURSE(
     Flask-UUID
     Flask-WTF
     flatbuffers
-    flex
+    flex 
     flup
     frozendict
     frozenlist
     fsspec
     ftfy
     funcparserlib
-    funcsigs
+    funcsigs 
     functools32
     furl
     future
@@ -472,7 +472,7 @@ RECURSE(
     h2
     h3
     h5py
-    hammock
+    hammock 
     hexdump
     hijri-converter
     hiredis
@@ -556,7 +556,7 @@ RECURSE(
     jsonobject
     jsonpath-rw
     jsonpickle
-    jsonpointer
+    jsonpointer 
     jsonref
     jsonschema
     jsonstreams
@@ -579,7 +579,7 @@ RECURSE(
     langcodes
     lark-parser
     lazy
-    lazy-object-proxy
+    lazy-object-proxy 
     lcov_cobertura
     lcov_cobertura/bin
     legacycontour
@@ -606,10 +606,10 @@ RECURSE(
     markdown2
     Markdown
     MarkupSafe
-    marshmallow
+    marshmallow 
     marshmallow_dataclass
     marshmallow-enum
-    marshmallow-mongoengine
+    marshmallow-mongoengine 
     marshmallow-oneofschema
     marshmallow-sqlalchemy
     marshmallow-union
@@ -681,9 +681,9 @@ RECURSE(
     openapi-codec
     openapi-core
     openapi-schema-validator
-    openapi-spec-validator
+    openapi-spec-validator 
     opencv-python
-    openpyxl
+    openpyxl 
     opensfm
     opentok
     opentracing
@@ -697,7 +697,7 @@ RECURSE(
     os-fast-reservoir
     packageurl-python
     packaging
-    paginate
+    paginate 
     pamela
     pampy
     pamqp
@@ -715,7 +715,7 @@ RECURSE(
     parsel
     Parsley
     parso
-    partd
+    partd 
     passlib
     patch
     patched
@@ -757,7 +757,7 @@ RECURSE(
     ppdeep
     pq
     pql
-    prance
+    prance 
     premailer
     preshed
     pretend
@@ -852,7 +852,7 @@ RECURSE(
     pysctp
     pysendfile
     pyserial
-    PySocks
+    PySocks 
     pystan
     pystan/pystan_model
     pysyncobj
@@ -864,7 +864,7 @@ RECURSE(
     pytest-datadir
     pytest-datafixtures
     pytest-django
-    pytest-falcon
+    pytest-falcon 
     pytest-falcon-client
     pytest-fixture-config
     pytest-flake8
@@ -872,9 +872,9 @@ RECURSE(
     pytest-flask
     pytest-forked
     pytest-freezegun
-    pytest-httpretty
+    pytest-httpretty 
     pytest-lazy-fixture
-    pytest-localserver
+    pytest-localserver 
     pytest-mock
     pytest-randomly
     pytest-responsemock
@@ -946,7 +946,7 @@ RECURSE(
     requests-oauthlib
     requests-toolbelt
     requests-unixsocket
-    responses
+    responses 
     respx
     retry
     retrying
@@ -974,7 +974,7 @@ RECURSE(
     schema
     schematics
     schwifty
-    scikit-image
+    scikit-image 
     scikit-learn
     scipy
     scour
@@ -1072,7 +1072,7 @@ RECURSE(
     tldextract
     toml
     tomli
-    toolz
+    toolz 
     toposort
     toredis
     tornado
diff --git a/library/python/svn_version/__svn_version.pyx b/library/python/svn_version/__svn_version.pyx
index d66bc09d24..cf4f4245d3 100644
--- a/library/python/svn_version/__svn_version.pyx
+++ b/library/python/svn_version/__svn_version.pyx
@@ -6,8 +6,8 @@ cdef extern from "library/cpp/svnversion/svnversion.h":
     cdef int GetArcadiaLastChangeNum() except +;
     cdef const char* GetProgramCommitId() except +;
     cdef const char* GetProgramHash() except +;
-    cdef const char* GetBranch() except +;
-    cdef const char* GetTag() except +;
+    cdef const char* GetBranch() except +; 
+    cdef const char* GetTag() except +; 
     cdef int GetArcadiaPatchNumber() except +;
 
 def svn_version():
@@ -15,7 +15,7 @@ def svn_version():
 
 def svn_revision():
     return GetProgramSvnRevision()
-
+ 
 def svn_last_revision():
     return GetArcadiaLastChangeNum()
 
@@ -25,11 +25,11 @@ def commit_id():
 def hash():
     return fu.bytes_to_native_str(GetProgramHash())
 
-def svn_branch():
-    return fu.bytes_to_native_str(GetBranch())
-
-def svn_tag():
-    return fu.bytes_to_native_str(GetTag())
+def svn_branch(): 
+    return fu.bytes_to_native_str(GetBranch()) 
+ 
+def svn_tag(): 
+    return fu.bytes_to_native_str(GetTag()) 
 
 def patch_number():
     return GetArcadiaPatchNumber()
diff --git a/library/python/symbols/libc/syms.cpp b/library/python/symbols/libc/syms.cpp
index 6c04a7ef6e..6390237a42 100644
--- a/library/python/symbols/libc/syms.cpp
+++ b/library/python/symbols/libc/syms.cpp
@@ -102,8 +102,8 @@ SYM(calloc)
 SYM(clock_gettime)
 SYM_2("clock_getres", ClockGetres)
 SYM(closedir)
-SYM(fdopen)
-SYM(fflush)
+SYM(fdopen) 
+SYM(fflush) 
 SYM(freeifaddrs)
 SYM(ftok)
 SYM(getifaddrs)