def CompareDates self left_arg right_arg Сравнить даты левая правой tr

def CompareDates(self,left_arg,right_arg):
    "Сравнить даты, левая с правой"
    try:
        LeftDate=time.mktime(time.strptime(left_arg,"%d.%m.%Y"))
        RightDate=time.mktime(time.strptime(right_arg,"%d.%m.%Y"))
    except:
        raise ServDBError("dbserv: date format error")
    #
    if LeftDate==RightDate:
        return 0
    elif LeftDate<RightDate:
        return 1
    else:
        return -1