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from datetime import tzinfo
class UTC(tzinfo):
"""UTC"""
def utcoffset(self, dt):
return 0
def tzname(self, dt):
return "UTC"
def dst(self, dt):
return 0
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):
# It depends on more than we know in an example.
return None # Indicate we don't know
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 -time.timezone/60
else:
return -time.altzone/60
def tzname(self, dt):
return time.tzname[self._isdst(dt)]
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