(self, dt)
datetime -> DST offset as timedelta, positive for east of UTC.

        Return 0 if DST not in effect.  utcoffset() must include the DST
        offset.
datetime -> DST offset as timedelta, positive for east of UTC.
datetime - > DST offset as timedelta positive for east of UTC .
def dst(self, dt):
        """datetime -> DST offset as timedelta, positive for east of UTC.

        Return 0 if DST not in effect.  utcoffset() must include the DST
        offset.
        """
        raise NotImplementedError("tzinfo subclass must override dst()")
def dst ( self , dt ) : raise NotImplementedError ( "tzinfo subclass must override dst()" )