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from datetime import tzinfo, timedelta
ZERO = timedelta(0)
class UTC(tzinfo):
"""UTC"""
def utcoffset(self, dt):
return ZERO
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return ZERO
class FixedOffset(tzinfo):
"""Fixed offset in minutes east from UTC."""
def __init__(self, offset, name):
self.__offset = offset
self.__name = name
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return ZERO
import time
class LocalTime(tzinfo):
"""Local time as defined by the operating system."""
def _isdst(self, dt):
t = (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
-1, -1, -1)
# XXX This may fail for years < 1970 or >= 2038
t = time.localtime(time.mktime(t))
return t.tm_isdst > 0
def utcoffset(self, dt):
if self._isdst(dt):
return timedelta(seconds=-time.timezone)
else:
return timedelta(seconds=-time.altzone)
def tzname(self, dt):
return time.tzname[self._isdst(dt)]
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