def _calc_daycount(y, m, d): daysBeforeMonthTab = [] b = 0 for _d in (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31): daysBeforeMonthTab.append(b) b += _d daysBeforeYear = (y - 1) * 365 + (y - 1) // 4 - (y - 1) // 100 + (y - 1) // 400 leap = y % 4 == 0 and (y % 100 != 0 or y % 400 == 0) daysBeforeMonth = daysBeforeMonthTab[m - 1] + (1 if (m > 2 and leap) else 0) return daysBeforeYear + daysBeforeMonth + d def _calc_weekday(y, m, d): return (_calc_daycount(y, m, d) + 6) % 7 class date(object): def __init__(self, year, month, day): self.year = year self.month = month self.day = day def __add__(self, other): #TODO return timedelta() def __sub__(self, other): if isinstance(other, date): return timedelta(_calc_daycount(self.year, self.month, self.day) - _calc_daycount(other.year, other.month, other.day)) #TODO return timedelta() def weekday(self): return _calc_weekday(self.year, self.month, self.day) class datetime(object): def __init__(self, year=0, month=0, day=0, hour=0, minute=0, second=0, microsecond=0, tzinfo=None): self.year = year self.month = month self.day = day self.hour = hour self.minute = minute self.second = second self.microsecond = microsecond self.tzinfo = tzinfo def __add__(self, other): #TODO return timedelta() def __sub__(self, other): #TODO return timedelta() @classmethod def now(cls, tz=None): #TODO return cls.utcnow() @classmethod def utcnow(cls): #TODO return cls() @classmethod def strptime(cls, date_string, format): #TODO pass def weekday(self): return _calc_weekday(self.year, self.month, self.day) class timedelta(object): def __init__(self, days=0, seconds=0, microseconds=0): self.days = days self.seconds = seconds self.microseconds = microseconds