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159 lines
6.2 KiB
ReStructuredText
159 lines
6.2 KiB
ReStructuredText
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dateutil - powerful extensions to datetime
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==========================================
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|pypi| |support| |licence|
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|gitter| |readthedocs|
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|travis| |appveyor| |coverage|
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.. |pypi| image:: https://img.shields.io/pypi/v/python-dateutil.svg?style=flat-square
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:target: https://pypi.org/project/python-dateutil/
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:alt: pypi version
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.. |support| image:: https://img.shields.io/pypi/pyversions/python-dateutil.svg?style=flat-square
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:target: https://pypi.org/project/python-dateutil/
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:alt: supported Python version
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.. |travis| image:: https://img.shields.io/travis/dateutil/dateutil/master.svg?style=flat-square&label=Travis%20Build
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:target: https://travis-ci.org/dateutil/dateutil
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:alt: travis build status
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.. |appveyor| image:: https://img.shields.io/appveyor/ci/dateutil/dateutil/master.svg?style=flat-square&logo=appveyor
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:target: https://ci.appveyor.com/project/dateutil/dateutil
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:alt: appveyor build status
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.. |coverage| image:: https://codecov.io/github/dateutil/dateutil/coverage.svg?branch=master
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:target: https://codecov.io/github/dateutil/dateutil?branch=master
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:alt: Code coverage
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.. |gitter| image:: https://badges.gitter.im/dateutil/dateutil.svg
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:alt: Join the chat at https://gitter.im/dateutil/dateutil
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:target: https://gitter.im/dateutil/dateutil
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.. |licence| image:: https://img.shields.io/pypi/l/python-dateutil.svg?style=flat-square
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:target: https://pypi.org/project/python-dateutil/
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:alt: licence
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.. |readthedocs| image:: https://img.shields.io/readthedocs/dateutil/latest.svg?style=flat-square&label=Read%20the%20Docs
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:alt: Read the documentation at https://dateutil.readthedocs.io/en/latest/
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:target: https://dateutil.readthedocs.io/en/latest/
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The `dateutil` module provides powerful extensions to
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the standard `datetime` module, available in Python.
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Download
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========
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dateutil is available on PyPI
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https://pypi.org/project/python-dateutil/
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The documentation is hosted at:
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https://dateutil.readthedocs.io/en/stable/
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Code
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====
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The code and issue tracker are hosted on Github:
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https://github.com/dateutil/dateutil/
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Features
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========
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* Computing of relative deltas (next month, next year,
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next monday, last week of month, etc);
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* Computing of relative deltas between two given
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date and/or datetime objects;
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* Computing of dates based on very flexible recurrence rules,
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using a superset of the `iCalendar <https://www.ietf.org/rfc/rfc2445.txt>`_
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specification. Parsing of RFC strings is supported as well.
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* Generic parsing of dates in almost any string format;
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* Timezone (tzinfo) implementations for tzfile(5) format
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files (/etc/localtime, /usr/share/zoneinfo, etc), TZ
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environment string (in all known formats), iCalendar
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format files, given ranges (with help from relative deltas),
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local machine timezone, fixed offset timezone, UTC timezone,
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and Windows registry-based time zones.
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* Internal up-to-date world timezone information based on
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Olson's database.
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* Computing of Easter Sunday dates for any given year,
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using Western, Orthodox or Julian algorithms;
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* A comprehensive test suite.
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Quick example
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=============
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Here's a snapshot, just to give an idea about the power of the
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package. For more examples, look at the documentation.
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Suppose you want to know how much time is left, in
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years/months/days/etc, before the next easter happening on a
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year with a Friday 13th in August, and you want to get today's
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date out of the "date" unix system command. Here is the code:
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.. doctest:: readmeexample
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>>> from dateutil.relativedelta import *
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>>> from dateutil.easter import *
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>>> from dateutil.rrule import *
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>>> from dateutil.parser import *
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>>> from datetime import *
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>>> now = parse("Sat Oct 11 17:13:46 UTC 2003")
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>>> today = now.date()
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>>> year = rrule(YEARLY,dtstart=now,bymonth=8,bymonthday=13,byweekday=FR)[0].year
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>>> rdelta = relativedelta(easter(year), today)
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>>> print("Today is: %s" % today)
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Today is: 2003-10-11
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>>> print("Year with next Aug 13th on a Friday is: %s" % year)
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Year with next Aug 13th on a Friday is: 2004
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>>> print("How far is the Easter of that year: %s" % rdelta)
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How far is the Easter of that year: relativedelta(months=+6)
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>>> print("And the Easter of that year is: %s" % (today+rdelta))
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And the Easter of that year is: 2004-04-11
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Being exactly 6 months ahead was **really** a coincidence :)
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Contributing
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============
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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.
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Author
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======
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The dateutil module was written by Gustavo Niemeyer <gustavo@niemeyer.net>
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in 2003.
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It is maintained by:
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* Gustavo Niemeyer <gustavo@niemeyer.net> 2003-2011
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* Tomi Pieviläinen <tomi.pievilainen@iki.fi> 2012-2014
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* Yaron de Leeuw <me@jarondl.net> 2014-2016
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* Paul Ganssle <paul@ganssle.io> 2015-
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Starting with version 2.4.1, all source and binary distributions will be signed
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by a PGP key that has, at the very least, been signed by the key which made the
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previous release. A table of release signing keys can be found below:
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=========== ============================
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Releases Signing key fingerprint
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=========== ============================
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2.4.1- `6B49 ACBA DCF6 BD1C A206 67AB CD54 FCE3 D964 BEFB`_ (|pgp_mirror|_)
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=========== ============================
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Contact
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=======
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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
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conduct <https://www.python.org/psf/codeofconduct/>`_.
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License
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=======
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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.
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.. _6B49 ACBA DCF6 BD1C A206 67AB CD54 FCE3 D964 BEFB:
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https://pgp.mit.edu/pks/lookup?op=vindex&search=0xCD54FCE3D964BEFB
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.. |pgp_mirror| replace:: mirror
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.. _pgp_mirror: https://sks-keyservers.net/pks/lookup?op=vindex&search=0xCD54FCE3D964BEFB
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