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Fix datestamp and timestamp notification options
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JonnyWong16
parent
4a120e7a54
commit
7484d65dbb
18 changed files with 7771 additions and 186 deletions
254
lib/arrow/factory.py
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254
lib/arrow/factory.py
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# -*- coding: utf-8 -*-
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"""
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Implements the :class:`ArrowFactory <arrow.factory.ArrowFactory>` class,
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providing factory methods for common :class:`Arrow <arrow.arrow.Arrow>`
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construction scenarios.
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"""
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from __future__ import absolute_import
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from arrow.arrow import Arrow
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from arrow import parser
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from arrow.util import is_timestamp, isstr
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from datetime import datetime, tzinfo, date
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from dateutil import tz as dateutil_tz
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from time import struct_time
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import calendar
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class ArrowFactory(object):
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''' A factory for generating :class:`Arrow <arrow.arrow.Arrow>` objects.
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:param type: (optional) the :class:`Arrow <arrow.arrow.Arrow>`-based class to construct from.
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Defaults to :class:`Arrow <arrow.arrow.Arrow>`.
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'''
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def __init__(self, type=Arrow):
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self.type = type
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def get(self, *args, **kwargs):
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''' Returns an :class:`Arrow <arrow.arrow.Arrow>` object based on flexible inputs.
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Usage::
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>>> import arrow
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**No inputs** to get current UTC time::
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>>> arrow.get()
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<Arrow [2013-05-08T05:51:43.316458+00:00]>
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**None** to also get current UTC time::
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>>> arrow.get(None)
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<Arrow [2013-05-08T05:51:43.316458+00:00]>
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**One** :class:`Arrow <arrow.arrow.Arrow>` object, to get a copy.
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>>> arw = arrow.utcnow()
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>>> arrow.get(arw)
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<Arrow [2013-10-23T15:21:54.354846+00:00]>
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**One** ``str``, ``float``, or ``int``, convertible to a floating-point timestamp, to get that timestamp in UTC::
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>>> arrow.get(1367992474.293378)
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<Arrow [2013-05-08T05:54:34.293378+00:00]>
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>>> arrow.get(1367992474)
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<Arrow [2013-05-08T05:54:34+00:00]>
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>>> arrow.get('1367992474.293378')
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<Arrow [2013-05-08T05:54:34.293378+00:00]>
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>>> arrow.get('1367992474')
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<Arrow [2013-05-08T05:54:34+0struct_time0:00]>
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**One** ISO-8601-formatted ``str``, to parse it::
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>>> arrow.get('2013-09-29T01:26:43.830580')
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<Arrow [2013-09-29T01:26:43.830580+00:00]>
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**One** ``tzinfo``, to get the current time in that timezone::
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>>> arrow.get(tz.tzlocal())
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<Arrow [2013-05-07T22:57:28.484717-07:00]>
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**One** naive ``datetime``, to get that datetime in UTC::
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>>> arrow.get(datetime(2013, 5, 5))
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<Arrow [2013-05-05T00:00:00+00:00]>
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**One** aware ``datetime``, to get that datetime::
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>>> arrow.get(datetime(2013, 5, 5, tzinfo=tz.tzlocal()))
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<Arrow [2013-05-05T00:00:00-07:00]>
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**One** naive ``date``, to get that date in UTC::
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>>> arrow.get(date(2013, 5, 5))
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<Arrow [2013-05-05T00:00:00+00:00]>
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**Two** arguments, a naive or aware ``datetime``, and a timezone expression (as above)::
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>>> arrow.get(datetime(2013, 5, 5), 'US/Pacific')
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<Arrow [2013-05-05T00:00:00-07:00]>
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**Two** arguments, a naive ``date``, and a timezone expression (as above)::
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>>> arrow.get(date(2013, 5, 5), 'US/Pacific')
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<Arrow [2013-05-05T00:00:00-07:00]>
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**Two** arguments, both ``str``, to parse the first according to the format of the second::
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>>> arrow.get('2013-05-05 12:30:45', 'YYYY-MM-DD HH:mm:ss')
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<Arrow [2013-05-05T12:30:45+00:00]>
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**Two** arguments, first a ``str`` to parse and second a ``list`` of formats to try::
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>>> arrow.get('2013-05-05 12:30:45', ['MM/DD/YYYY', 'YYYY-MM-DD HH:mm:ss'])
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<Arrow [2013-05-05T12:30:45+00:00]>
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**Three or more** arguments, as for the constructor of a ``datetime``::
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>>> arrow.get(2013, 5, 5, 12, 30, 45)
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<Arrow [2013-05-05T12:30:45+00:00]>
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**One** time.struct time::
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>>> arrow.get(gmtime(0))
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<Arrow [1970-01-01T00:00:00+00:00]>
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'''
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arg_count = len(args)
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locale = kwargs.get('locale', 'en_us')
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tz = kwargs.get('tzinfo', None)
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# () -> now, @ utc.
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if arg_count == 0:
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if isinstance(tz, tzinfo):
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return self.type.now(tz)
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return self.type.utcnow()
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if arg_count == 1:
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arg = args[0]
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# (None) -> now, @ utc.
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if arg is None:
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return self.type.utcnow()
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# try (int, float, str(int), str(float)) -> utc, from timestamp.
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if is_timestamp(arg):
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return self.type.utcfromtimestamp(arg)
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# (Arrow) -> from the object's datetime.
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if isinstance(arg, Arrow):
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return self.type.fromdatetime(arg.datetime)
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# (datetime) -> from datetime.
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if isinstance(arg, datetime):
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return self.type.fromdatetime(arg)
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# (date) -> from date.
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if isinstance(arg, date):
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return self.type.fromdate(arg)
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# (tzinfo) -> now, @ tzinfo.
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elif isinstance(arg, tzinfo):
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return self.type.now(arg)
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# (str) -> now, @ tzinfo.
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elif isstr(arg):
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dt = parser.DateTimeParser(locale).parse_iso(arg)
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return self.type.fromdatetime(dt)
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# (struct_time) -> from struct_time
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elif isinstance(arg, struct_time):
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return self.type.utcfromtimestamp(calendar.timegm(arg))
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else:
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raise TypeError('Can\'t parse single argument type of \'{0}\''.format(type(arg)))
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elif arg_count == 2:
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arg_1, arg_2 = args[0], args[1]
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if isinstance(arg_1, datetime):
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# (datetime, tzinfo) -> fromdatetime @ tzinfo/string.
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if isinstance(arg_2, tzinfo) or isstr(arg_2):
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return self.type.fromdatetime(arg_1, arg_2)
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else:
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raise TypeError('Can\'t parse two arguments of types \'datetime\', \'{0}\''.format(
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type(arg_2)))
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# (date, tzinfo/str) -> fromdate @ tzinfo/string.
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elif isinstance(arg_1, date):
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if isinstance(arg_2, tzinfo) or isstr(arg_2):
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return self.type.fromdate(arg_1, tzinfo=arg_2)
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else:
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raise TypeError('Can\'t parse two arguments of types \'date\', \'{0}\''.format(
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type(arg_2)))
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# (str, format) -> parse.
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elif isstr(arg_1) and (isstr(arg_2) or isinstance(arg_2, list)):
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dt = parser.DateTimeParser(locale).parse(args[0], args[1])
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return self.type.fromdatetime(dt, tzinfo=tz)
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else:
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raise TypeError('Can\'t parse two arguments of types \'{0}\', \'{1}\''.format(
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type(arg_1), type(arg_2)))
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# 3+ args -> datetime-like via constructor.
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else:
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return self.type(*args, **kwargs)
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def utcnow(self):
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'''Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now" in UTC time.
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Usage::
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>>> import arrow
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>>> arrow.utcnow()
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<Arrow [2013-05-08T05:19:07.018993+00:00]>
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'''
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return self.type.utcnow()
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def now(self, tz=None):
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'''Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now".
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:param tz: (optional) An expression representing a timezone. Defaults to local time.
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Recognized timezone expressions:
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- A ``tzinfo`` object.
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- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
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- A ``str`` in ISO-8601 style, as in '+07:00'.
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- A ``str``, one of the following: 'local', 'utc', 'UTC'.
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Usage::
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>>> import arrow
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>>> arrow.now()
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<Arrow [2013-05-07T22:19:11.363410-07:00]>
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>>> arrow.now('US/Pacific')
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<Arrow [2013-05-07T22:19:15.251821-07:00]>
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>>> arrow.now('+02:00')
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<Arrow [2013-05-08T07:19:25.618646+02:00]>
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>>> arrow.now('local')
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<Arrow [2013-05-07T22:19:39.130059-07:00]>
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'''
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if tz is None:
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tz = dateutil_tz.tzlocal()
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elif not isinstance(tz, tzinfo):
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tz = parser.TzinfoParser.parse(tz)
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return self.type.now(tz)
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