##

# python.datetime - parts needed to use stdlib.datetime

##

import datetime

##

# stdlib.datetime representation of PostgreSQL 'infinity' and '-infinity'.

infinity_datetime = datetime.datetime(datetime.MAXYEAR, 12, 31, 23, 59, 59, 999999)

negative_infinity_datetime = datetime.datetime(datetime.MINYEAR, 1, 1, 0, 0, 0, 0)

infinity_date = datetime.date(datetime.MAXYEAR, 12, 31)

negative_infinity_date = datetime.date(datetime.MINYEAR, 1, 1)

class FixedOffset(datetime.tzinfo):

def __init__(self, offset_in_seconds, tzname = None):

self._tzname = tzname

self._offset = offset_in_seconds

self._offset_in_mins = offset_in_seconds // 60

self._td_offset = datetime.timedelta(0, self._offset_in_mins * 60)

self._dst = datetime.timedelta(0)

def utcoffset(self, offset_from):

return self._td_offset

def tzname(self, dt):

return self._tzname

def dst(self, arg):

return self._dst

def __repr__(self):

return "{path}.{name}({off}{tzname})".format(

path = type(self).__module__,

name = type(self).__name__,

off = repr(self._td_offset.days * 24 * 60 * 60 + self._td_offset.seconds),

tzname = (

", tzname = {tzname!r}".format(tzname = self._tzname) \

if self._tzname is not None else ""

)

)

UTC = FixedOffset(0, tzname = 'UTC')