offsets.py 文件源码

def onOffset(self, dt):
        if self.normalize and not _is_normalized(dt):
            return False
        first_weekday, _ = tslib.monthrange(dt.year, dt.month)
        if first_weekday == 5:
            return dt.day == 3
        elif first_weekday == 6:
            return dt.day == 2
        else:
            return dt.day == 1