def transitions(self, year):
        """
        For a given year, get the DST on and off transition times, expressed
        always on the standard time side. For zones with no transitions, this
        function returns ``None``.

        :param year:
            The year whose transitions you would like to query.

        :return:
            Returns a :class:`tuple` of :class:`datetime.datetime` objects,
            ``(dston, dstoff)`` for zones with an annual DST transition, or
            ``None`` for fixed offset zones.
        """

        if not self.hasdst:
            return None

        dston = picknthweekday(year, self._dstmonth, self._dstdayofweek,
                               self._dsthour, self._dstminute,
                               self._dstweeknumber)

        dstoff = picknthweekday(year, self._stdmonth, self._stddayofweek,
                                self._stdhour, self._stdminute,
                                self._stdweeknumber)

        # Ambiguous dates default to the STD side
        dstoff -= self._dst_base_offset

        return dston, dstoff
def transitions(self, year):
        """
        For a given year, get the DST on and off transition times, expressed
        always on the standard time side. For zones with no transitions, this
        function returns ``None``.

        :param year:
            The year whose transitions you would like to query.

        :return:
            Returns a :class:`tuple` of :class:`datetime.datetime` objects,
            ``(dston, dstoff)`` for zones with an annual DST transition, or
            ``None`` for fixed offset zones.
        """

        if not self.hasdst:
            return None

        dston = picknthweekday(year, self._dstmonth, self._dstdayofweek,
                               self._dsthour, self._dstminute,
                               self._dstweeknumber)

        dstoff = picknthweekday(year, self._stdmonth, self._stddayofweek,
                                self._stdhour, self._stdminute,
                                self._stdweeknumber)

        # Ambiguous dates default to the STD side
        dstoff -= self._dst_base_offset

        return dston, dstoff
def transitions ( self , year ) : if not self . hasdst : return None dston = picknthweekday ( year , self . _dstmonth , self . _dstdayofweek , self . _dsthour , self . _dstminute , self . _dstweeknumber ) dstoff = picknthweekday ( year , self . _stdmonth , self . _stddayofweek , self . _stdhour , self . _stdminute , self . _stdweeknumber ) # Ambiguous dates default to the STD side dstoff -= self . _dst_base_offset return dston , dstoff
For a given year, get the DST on and off transition times, expressed
        always on the standard time side. For zones with no transitions, this
        function returns ``None``.

        :param year:
            The year whose transitions you would like to query.

        :return:
            Returns a :class:`tuple` of :class:`datetime.datetime` objects,
            ``(dston, dstoff)`` for zones with an annual DST transition, or
            ``None`` for fixed offset zones.
For a given year get the DST on and off transition times expressed always on the standard time side . For zones with no transitions this function returns None .