offsets.py 文件源码

def apply(self, other):
        n = self.n
        _, days_in_month = tslib.monthrange(other.year, other.month)
        if other.day != days_in_month:
            other = other + relativedelta(months=-1, day=31)
            if n <= 0:
                n = n + 1
        other = other + relativedelta(months=n, day=31)
        return other