offsets.py 文件源码

def onOffset(self, dt):
        if self.normalize and not _is_normalized(dt):
            return False
        dt = datetime(dt.year, dt.month, dt.day)
        year_end = self.get_year_end(dt)

        if self.variation == "nearest":
            # We have to check the year end of "this" cal year AND the previous
            return year_end == dt or \
                self.get_year_end(dt - relativedelta(months=1)) == dt
        else:
            return year_end == dt