/usr/lib/python2.7/dist-packages/arrow/factory.py is in python-arrow 0.10.0-1.
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"""
Implements the :class:`ArrowFactory <arrow.factory.ArrowFactory>` class,
providing factory methods for common :class:`Arrow <arrow.arrow.Arrow>`
construction scenarios.
"""
from __future__ import absolute_import
from arrow.arrow import Arrow
from arrow import parser
from arrow.util import is_timestamp, isstr
from datetime import datetime, tzinfo, date
from dateutil import tz as dateutil_tz
from time import struct_time
import calendar
class ArrowFactory(object):
''' A factory for generating :class:`Arrow <arrow.arrow.Arrow>` objects.
:param type: (optional) the :class:`Arrow <arrow.arrow.Arrow>`-based class to construct from.
Defaults to :class:`Arrow <arrow.arrow.Arrow>`.
'''
def __init__(self, type=Arrow):
self.type = type
def get(self, *args, **kwargs):
''' Returns an :class:`Arrow <arrow.arrow.Arrow>` object based on flexible inputs.
Usage::
>>> import arrow
**No inputs** to get current UTC time::
>>> arrow.get()
<Arrow [2013-05-08T05:51:43.316458+00:00]>
**None** to also get current UTC time::
>>> arrow.get(None)
<Arrow [2013-05-08T05:51:43.316458+00:00]>
**One** :class:`Arrow <arrow.arrow.Arrow>` object, to get a copy.
>>> arw = arrow.utcnow()
>>> arrow.get(arw)
<Arrow [2013-10-23T15:21:54.354846+00:00]>
**One** ``str``, ``float``, or ``int``, convertible to a floating-point timestamp, to get that timestamp in UTC::
>>> arrow.get(1367992474.293378)
<Arrow [2013-05-08T05:54:34.293378+00:00]>
>>> arrow.get(1367992474)
<Arrow [2013-05-08T05:54:34+00:00]>
>>> arrow.get('1367992474.293378')
<Arrow [2013-05-08T05:54:34.293378+00:00]>
>>> arrow.get('1367992474')
<Arrow [2013-05-08T05:54:34+0struct_time0:00]>
**One** ISO-8601-formatted ``str``, to parse it::
>>> arrow.get('2013-09-29T01:26:43.830580')
<Arrow [2013-09-29T01:26:43.830580+00:00]>
**One** ``tzinfo``, to get the current time in that timezone::
>>> arrow.get(tz.tzlocal())
<Arrow [2013-05-07T22:57:28.484717-07:00]>
**One** naive ``datetime``, to get that datetime in UTC::
>>> arrow.get(datetime(2013, 5, 5))
<Arrow [2013-05-05T00:00:00+00:00]>
**One** aware ``datetime``, to get that datetime::
>>> arrow.get(datetime(2013, 5, 5, tzinfo=tz.tzlocal()))
<Arrow [2013-05-05T00:00:00-07:00]>
**One** naive ``date``, to get that date in UTC::
>>> arrow.get(date(2013, 5, 5))
<Arrow [2013-05-05T00:00:00+00:00]>
**Two** arguments, a naive or aware ``datetime``, and a timezone expression (as above)::
>>> arrow.get(datetime(2013, 5, 5), 'US/Pacific')
<Arrow [2013-05-05T00:00:00-07:00]>
**Two** arguments, a naive ``date``, and a timezone expression (as above)::
>>> arrow.get(date(2013, 5, 5), 'US/Pacific')
<Arrow [2013-05-05T00:00:00-07:00]>
**Two** arguments, both ``str``, to parse the first according to the format of the second::
>>> arrow.get('2013-05-05 12:30:45', 'YYYY-MM-DD HH:mm:ss')
<Arrow [2013-05-05T12:30:45+00:00]>
**Two** arguments, first a ``str`` to parse and second a ``list`` of formats to try::
>>> arrow.get('2013-05-05 12:30:45', ['MM/DD/YYYY', 'YYYY-MM-DD HH:mm:ss'])
<Arrow [2013-05-05T12:30:45+00:00]>
**Three or more** arguments, as for the constructor of a ``datetime``::
>>> arrow.get(2013, 5, 5, 12, 30, 45)
<Arrow [2013-05-05T12:30:45+00:00]>
**One** time.struct time::
>>> arrow.get(gmtime(0))
<Arrow [1970-01-01T00:00:00+00:00]>
'''
arg_count = len(args)
locale = kwargs.get('locale', 'en_us')
tz = kwargs.get('tzinfo', None)
# () -> now, @ utc.
if arg_count == 0:
if isinstance(tz, tzinfo):
return self.type.now(tz)
return self.type.utcnow()
if arg_count == 1:
arg = args[0]
# (None) -> now, @ utc.
if arg is None:
return self.type.utcnow()
# try (int, float, str(int), str(float)) -> utc, from timestamp.
if is_timestamp(arg):
return self.type.utcfromtimestamp(arg)
# (Arrow) -> from the object's datetime.
if isinstance(arg, Arrow):
return self.type.fromdatetime(arg.datetime)
# (datetime) -> from datetime.
if isinstance(arg, datetime):
return self.type.fromdatetime(arg)
# (date) -> from date.
if isinstance(arg, date):
return self.type.fromdate(arg)
# (tzinfo) -> now, @ tzinfo.
elif isinstance(arg, tzinfo):
return self.type.now(arg)
# (str) -> now, @ tzinfo.
elif isstr(arg):
dt = parser.DateTimeParser(locale).parse_iso(arg)
return self.type.fromdatetime(dt)
# (struct_time) -> from struct_time
elif isinstance(arg, struct_time):
return self.type.utcfromtimestamp(calendar.timegm(arg))
else:
raise TypeError('Can\'t parse single argument type of \'{0}\''.format(type(arg)))
elif arg_count == 2:
arg_1, arg_2 = args[0], args[1]
if isinstance(arg_1, datetime):
# (datetime, tzinfo) -> fromdatetime @ tzinfo/string.
if isinstance(arg_2, tzinfo) or isstr(arg_2):
return self.type.fromdatetime(arg_1, arg_2)
else:
raise TypeError('Can\'t parse two arguments of types \'datetime\', \'{0}\''.format(
type(arg_2)))
# (date, tzinfo/str) -> fromdate @ tzinfo/string.
elif isinstance(arg_1, date):
if isinstance(arg_2, tzinfo) or isstr(arg_2):
return self.type.fromdate(arg_1, tzinfo=arg_2)
else:
raise TypeError('Can\'t parse two arguments of types \'date\', \'{0}\''.format(
type(arg_2)))
# (str, format) -> parse.
elif isstr(arg_1) and (isstr(arg_2) or isinstance(arg_2, list)):
dt = parser.DateTimeParser(locale).parse(args[0], args[1])
return self.type.fromdatetime(dt, tzinfo=tz)
else:
raise TypeError('Can\'t parse two arguments of types \'{0}\', \'{1}\''.format(
type(arg_1), type(arg_2)))
# 3+ args -> datetime-like via constructor.
else:
return self.type(*args, **kwargs)
def utcnow(self):
'''Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now" in UTC time.
Usage::
>>> import arrow
>>> arrow.utcnow()
<Arrow [2013-05-08T05:19:07.018993+00:00]>
'''
return self.type.utcnow()
def now(self, tz=None):
'''Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now".
:param tz: (optional) An expression representing a timezone. Defaults to local time.
Recognized timezone expressions:
- A ``tzinfo`` object.
- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
- A ``str`` in ISO-8601 style, as in '+07:00'.
- A ``str``, one of the following: 'local', 'utc', 'UTC'.
Usage::
>>> import arrow
>>> arrow.now()
<Arrow [2013-05-07T22:19:11.363410-07:00]>
>>> arrow.now('US/Pacific')
<Arrow [2013-05-07T22:19:15.251821-07:00]>
>>> arrow.now('+02:00')
<Arrow [2013-05-08T07:19:25.618646+02:00]>
>>> arrow.now('local')
<Arrow [2013-05-07T22:19:39.130059-07:00]>
'''
if tz is None:
tz = dateutil_tz.tzlocal()
elif not isinstance(tz, tzinfo):
tz = parser.TzinfoParser.parse(tz)
return self.type.now(tz)
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