/dateparser

python parser for human readable dates

Primary LanguagePythonBSD 3-Clause "New" or "Revised" LicenseBSD-3-Clause

dateparser -- python parser for human readable dates

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dateparser provides modules to easily parse localized dates in almost any string formats commonly found on web pages.

Documentation

Documentation is built automatically and can be found on Read the Docs.

Features

  • Generic parsing of dates in English, Spanish, Dutch, Russian and over 20 other languages plus numerous formats in a language agnostic fashion.
  • Generic parsing of relative dates like: '1 min ago', '2 weeks ago', '3 months, 1 week and 1 day ago', 'in 2 days', 'tomorrow'.
  • Generic parsing of dates with time zones abbreviations or UTC offsets like: 'August 14, 2015 EST', 'July 4, 2013 PST', '21 July 2013 10:15 pm +0500'.
  • Support for non-Gregorian calendar systems. See Supported Calendars.
  • Extensive test coverage.

Usage

The most straightforward way is to use the dateparser.parse function, that wraps around most of the functionality in the module.

.. automodule:: dateparser
   :members: parse

Popular Formats

>>> import dateparser
>>> dateparser.parse('12/12/12')
datetime.datetime(2012, 12, 12, 0, 0)
>>> dateparser.parse(u'Fri, 12 Dec 2014 10:55:50')
datetime.datetime(2014, 12, 12, 10, 55, 50)
>>> dateparser.parse(u'Martes 21 de Octubre de 2014')  # Spanish (Tuesday 21 October 2014)
datetime.datetime(2014, 10, 21, 0, 0)
>>> dateparser.parse(u'Le 11 Décembre 2014 à 09:00')  # French (11 December 2014 at 09:00)
datetime.datetime(2014, 12, 11, 9, 0)
>>> dateparser.parse(u'13 января 2015 г. в 13:34')  # Russian (13 January 2015 at 13:34)
datetime.datetime(2015, 1, 13, 13, 34)
>>> dateparser.parse(u'1 เดือนตุลาคม 2005, 1:00 AM')  # Thai (1 October 2005, 1:00 AM)
datetime.datetime(2005, 10, 1, 1, 0)

This will try to parse a date from the given string, attempting to detect the language each time.

You can specify the language(s), if known, using languages argument. In this case, given languages are used and language detection is skipped:

>>> dateparser.parse('2015, Ago 15, 1:08 pm', languages=['pt', 'es'])
datetime.datetime(2015, 8, 15, 13, 8)

If you know the possible formats of the dates, you can use the date_formats argument:

>>> dateparser.parse(u'22 Décembre 2010', date_formats=['%d %B %Y'])
datetime.datetime(2010, 12, 22, 0, 0)

Relative Dates

>>> parse('1 hour ago')
datetime.datetime(2015, 5, 31, 23, 0)
>>> parse(u'Il ya 2 heures')  # French (2 hours ago)
datetime.datetime(2015, 5, 31, 22, 0)
>>> parse(u'1 anno 2 mesi')  # Italian (1 year 2 months)
datetime.datetime(2014, 4, 1, 0, 0)
>>> parse(u'yaklaşık 23 saat önce')  # Turkish (23 hours ago)
datetime.datetime(2015, 5, 31, 1, 0)
>>> parse(u'Hace una semana')  # Spanish (a week ago)
datetime.datetime(2015, 5, 25, 0, 0)
>>> parse(u'2小时前')  # Chinese (2 hours ago)
datetime.datetime(2015, 5, 31, 22, 0)

Note

Testing above code might return different values for you depending on your environment's current date and time.

Note

Support for relative dates in future needs a lot of improvement, we look forward to community's contribution to get better on that part. See `Contributing`_.

OOTB Language Based Date Order Preference

>>> # parsing ambiguous date
>>> parse('02-03-2016')  # assumes english language, uses MDY date order
datetime.datetime(2016, 3, 2, 0, 0)
>>> parse('le 02-03-2016')  # detects french, uses DMY date order
datetime.datetime(2016, 3, 2, 0, 0)

Note

Ordering is not locale based, that's why do not expect DMY order for UK/Australia English. You can specify date order in that case as follows usings `Settings`_:

>>> parse('18-12-15 06:00', settings={'DATE_ORDER': 'DMY'})
datetime.datetime(2015, 12, 18, 6, 0)

For more on date order, please look at `Settings`_.

Timezone and UTC Offset

dateparser automatically detects the timezone if given in the date string. If date has no timezone name/abbreviation or offset, you can still specify it using TIMEZONE setting.

>>> parse('January 12, 2012 10:00 PM', settings={'TIMEZONE': 'US/Eastern'})
datetime.datetime(2012, 1, 12, 22, 0)

You can also convert from one time zone to another using TO_TIMEZONE setting.

>>> parse('10:00 am', settings={'TO_TIMEZONE': 'EDT', 'TIMEZONE': 'EST'})
datetime.datetime(2016, 9, 25, 11, 0)
>>> parse('10:00 am EST', settings={'TO_TIMEZONE': 'EDT'})
datetime.datetime(2016, 9, 25, 11, 0)

Support for tzaware objects:

>>> parse('12 Feb 2015 10:56 PM EST', settings={'RETURN_AS_TIMEZONE_AWARE': True})
datetime.datetime(2015, 2, 12, 22, 56, tzinfo=<StaticTzInfo 'EST'>)

For more on timezones, please look at `Settings`_.

Incomplete Dates

>>> from dateparser import parse
>>> parse(u'December 2015')  # default behavior
datetime.datetime(2015, 12, 16, 0, 0)
>>> parse(u'December 2015', settings={'PREFER_DAY_OF_MONTH': 'last'})
datetime.datetime(2015, 12, 31, 0, 0)
>>> parse(u'December 2015', settings={'PREFER_DAY_OF_MONTH': 'first'})
datetime.datetime(2015, 12, 1, 0, 0)
>>> parse(u'March')
datetime.datetime(2015, 3, 16, 0, 0)
>>> parse(u'March', settings={'PREFER_DATES_FROM': 'future'})
datetime.datetime(2016, 3, 16, 0, 0)
>>> # parsing with preference set for 'past'
>>> parse('August', settings={'PREFER_DATES_FROM': 'past'})
datetime.datetime(2015, 8, 15, 0, 0)

You can also ignore parsing incomplete dates altogether by setting STRICT_PARSING flag as follows:

>>> parse(u'December 2015', settings={'STRICT_PARSING': True})
None

For more on handling incomplete dates, please look at `Settings`_.

Dependencies

dateparser relies on following libraries in some ways:

  • dateutil's module relativedelta for its freshness parser.
  • ruamel.yaml for reading language and configuration files.
  • jdatetime to convert Jalali dates to Gregorian.
  • umalqurra to convert Hijri dates to Gregorian.
  • tzlocal to reliably get local timezone.

Supported languages

  • Arabic
  • Belarusian
  • Chinese
  • Czech
  • Danish
  • Dutch
  • English
  • Filipino/Tagalog
  • Finnish
  • French
  • Hebrew
  • Hungarian
  • German
  • Indonesian
  • Italian
  • Japanese
  • Persian
  • Polish
  • Portuguese
  • Romanian
  • Russian
  • Spanish
  • Thai
  • Turkish
  • Ukrainian
  • Vietnamese

Supported Calendars

  • Gregorian calendar.

  • Persian Jalali calendar. For more information, refer to Persian Jalali Calendar.

  • Hijri/Islamic Calendar. For more information, refer to Hijri Calendar.

    >>> from dateparser.calendars.jalali import JalaliCalendar
>>> JalaliCalendar(u'جمعه سی ام اسفند ۱۳۸۷').get_date()
{'date_obj': datetime.datetime(2009, 3, 20, 0, 0), 'period': 'day'}
    >>> from dateparser.calendars.hijri import HijriCalendar
>>> HijriCalendar(u'17-01-1437 هـ 08:30 مساءً').get_date()
{'date_obj': datetime.datetime(2015, 10, 30, 20, 30), 'period': 'day'}

Note

HijriCalendar has some limitations with Python 3.

Note

For Finnish language, please specify settings={'SKIP_TOKENS': []} to correctly parse freshness dates.