ver_2.py 文件源码

def __init__(self, year=None, month=None, day=None, hour=None, minute=None, second=None, microsecond=None):
        params = vars()
        self._mask = {}
        for attr in ('year', 'month', 'day', 'hour', 'minute', 'second', 'microsecond'):
            value = params[attr]
            if value is not None:
                self._mask[attr] = value