445         return self.__cmp__(other) == 0
469     def __cmp__(self, other):  member in extended_date
494         return self.__cmp__(other) < 0
497         return self.__cmp__(other) <= 0
500         return self.__cmp__(other) > 0
503         return self.__cmp__(other) >= 0
742         return self.__cmp__(other) == 0
775     def __cmp__(self, other):  member in extended_datetime
801         return self.__cmp__(other) < 0
804         return self.__cmp__(other) <= 0
807         return self.__cmp__(other) > 0
810         return self.__cmp__(other) >= 0