dgilland / Zulu
Programming Languages
Projects that are alternatives of or similar to Zulu
zulu
|version| |build| |coveralls| |license|
A drop-in replacement for native datetimes that embraces UTC
Links
- Project: https://github.com/dgilland/zulu
- Documentation: https://zulu.readthedocs.io
- PyPI: https://pypi.python.org/pypi/zulu/
- Github Actions: https://github.com/dgilland/zulu/actions
Features
- All datetime objects converted and stored as UTC.
- Parses ISO8601 formatted strings and POSIX timestamps by default.
- Timezone representation applied only during string output formatting or when casting to native datetime object.
- Drop-in replacement for native datetime objects.
- Python 3.6+
Quickstart
Install using pip:
::
pip3 install zulu
.. code-block:: python
import zulu
zulu.now()
# <Zulu [2016-07-25T19:33:18.137493+00:00]>
dt = zulu.parse('2016-07-25T19:33:18.137493+00:00')
# <Zulu [2016-07-25T19:33:18.137493+00:00]>
dt = zulu.create(2016, 7, 25, 19, 33, 18, 137493)
# <Zulu [2016-07-25T19:33:18.137493+00:00]>
dt.isoformat()
# '2016-07-25T19:33:18.137493+00:00'
dt.timestamp()
# 1469475198.137493
dt.naive
# datetime.datetime(2016, 7, 25, 19, 33, 18, 137493)
dt.datetime
# datetime.datetime(2016, 7, 25, 19, 33, 18, 137493, tzinfo=<UTC>)
dt.format('%Y-%m-%d')
# 2016-07-25
dt.format('YYYY-MM-dd')
# 2016-07-25
dt.format("E, MMM d, ''YY")
# "Mon, Jul 25, '16"
dt.format("E, MMM d, ''YY", locale='de')
# "Mo., Juli 25, '16"
dt.format("E, MMM d, ''YY", locale='fr')
# "lun., juil. 25, '16"
dt.shift(hours=-5, minutes=10)
# <Zulu [2016-07-25T14:43:18.137493+00:00]>
dt.replace(hour=14, minute=43)
# <Zulu [2016-07-25T14:43:18.137493+00:00]>
dt.start_of('day')
# <Zulu [2016-07-25T00:00:00+00:00]>
dt.end_of('day')
# <Zulu [2016-07-25T23:59:59.999999+00:00]>
dt.span('hour')
# (<Zulu [2016-07-25T19:00:00+00:00]>, <Zulu [2016-07-25T19:59:59.999999+00:00]>)
dt.time_from(dt.end_of('day'))
# '4 hours ago'
dt.time_to(dt.end_of('day'))
# 'in 4 hours'
list(zulu.range('hour', dt, dt.shift(hours=4)))
# [Zulu [2016-07-25T19:33:18.137493+00:00]>,
# Zulu [2016-07-25T20:33:18.137493+00:00]>,
# Zulu [2016-07-25T21:33:18.137493+00:00]>,
# Zulu [2016-07-25T22:33:18.137493+00:00]>]
list(zulu.span_range('minute', dt, dt.shift(minutes=4)))
# [(Zulu [2016-07-25T19:33:00+00:00]>, Zulu [2016-07-25T19:33:59.999999+00:00]>),
# (Zulu [2016-07-25T19:34:00+00:00]>, Zulu [2016-07-25T19:34:59.999999+00:00]>),
# (Zulu [2016-07-25T19:35:00+00:00]>, Zulu [2016-07-25T19:35:59.999999+00:00]>),
# (Zulu [2016-07-25T19:36:00+00:00]>, Zulu [2016-07-25T19:36:59.999999+00:00]>)]
zulu.parse_delta('1w 3d 2h 32m')
# <Delta [10 days, 2:32:00]>
zulu.parse_delta('2:04:13:02.266')
# <Delta [2 days, 4:13:02.266000]>
zulu.parse_delta('2 days, 5 hours, 34 minutes, 56 seconds')
# <Delta [2 days, 5:34:56]>
Why Zulu?
Why zulu instead of native datetimes <https://docs.python.org/3.5/library/datetime.html#datetime-objects>
_:
- Zulu has extended datetime features such as
parse()
,format()
,shift()
, andpython-dateutil
_ timezone support. - Parses ISO8601 and timestamps by default without any extra arguments.
- Easier to reason about
Zulu
objects since they are only ever UTC datetimes. - Clear delineation between UTC and other time zones where timezone representation is only applicable for display or conversion to native datetime.
- Supports more string parsing/formatting options using
Unicode date patterns
_ as well asstrptime/strftime
directives.
Why zulu instead of Arrow
_:
- Zulu is a drop-in replacement for native datetimes (inherits from
datetime.datetime
). No need to convert usingarrow.datetime
when you need a datetime (zulu is always a datetime). - Stricter parsing to avoid silent errors. For example, one might expect
arrow.get('02/08/1987', 'MM/DD/YY')
to fail (input does not match format) but it gladly returns<Arrow [2019-02-08T00:00:00+00:00)
whereaszulu.parse('02/08/1987', '%m/%d/%y')
throwszulu.parser.ParseError: Value "02/08/1987" does not match any format in ['%m/%d/%y']
. - Avoids timezone/DST shifting bugs by only dealing with UTC datetimes when applying timedeltas or performing other calculations.
- Supports
strptime/strftime
as well asUnicode date patterns
_ for string parsing/formatting.
Special Thanks
Special thanks goes out to the authors/contributors of the following libraries that have made it possible for zulu
to exist:
-
Babel
_ -
iso8601
_ -
python-dateutil
_ -
pytimeparse
_ -
pytz
_
For the full documentation, please visit https://zulu.readthedocs.io.
.. _Unicode date patterns: http://www.unicode.org/reports/tr35/tr35-19.html#Date_Field_Symbol_Table .. _Arrow: https://arrow.readthedocs.io .. _Babel: https://github.com/python-babel/babel .. _iso8601: https://bitbucket.org/micktwomey/pyiso8601 .. _python-dateutil: https://github.com/dateutil/dateutil .. _pytimeparse: https://github.com/wroberts/pytimeparse .. _pytz: http://pythonhosted.org/pytz
.. |version| image:: https://img.shields.io/pypi/v/zulu.svg?style=flat-square :target: https://pypi.python.org/pypi/zulu/
.. |build| image:: https://img.shields.io/github/workflow/status/dgilland/zulu/Main/master?style=flat-square :target: https://github.com/dgilland/zulu/actions
.. |coveralls| image:: https://img.shields.io/coveralls/dgilland/zulu/master.svg?style=flat-square :target: https://coveralls.io/r/dgilland/zulu
.. |license| image:: https://img.shields.io/pypi/l/zulu.svg?style=flat-square :target: https://pypi.python.org/pypi/zulu/