@classmethod<EOL><INDENT>def get_timestamp(cls, time_string: str, fmt: str):<DEDENT>
return int(time.mktime(time.strptime(time_string, fmt)))<EOL>
获得给定的时间字符串，获得相应的时间戳
        :param time_string: 时间字符串
        :param fmt:
        :return: