offsets.py 文件源码

def apply(self, other):
        base = other
        if self.weekday is None:
            return other + self.n * self._inc

        if self.n > 0:
            k = self.n
            otherDay = other.weekday()
            if otherDay != self.weekday:
                other = other + timedelta((self.weekday - otherDay) % 7)
                k = k - 1
            other = other
            for i in range(k):
                other = other + self._inc
        else:
            k = self.n
            otherDay = other.weekday()
            if otherDay != self.weekday:
                other = other + timedelta((self.weekday - otherDay) % 7)
            for i in range(-k):
                other = other - self._inc

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