offsets.py 文件源码

def apply(self, other):
        currentEaster = easter(other.year)
        currentEaster = datetime(
            currentEaster.year, currentEaster.month, currentEaster.day)
        currentEaster = tslib._localize_pydatetime(currentEaster, other.tzinfo)

        # NOTE: easter returns a datetime.date so we have to convert to type of
        # other
        if self.n >= 0:
            if other >= currentEaster:
                new = easter(other.year + self.n)
            else:
                new = easter(other.year + self.n - 1)
        else:
            if other > currentEaster:
                new = easter(other.year + self.n + 1)
            else:
                new = easter(other.year + self.n)

        new = datetime(new.year, new.month, new.day, other.hour,
                       other.minute, other.second, other.microsecond)
        return new