(user_id: Union[int, str])
return MessageSegment(type_='at', data={'qq': str(user_id)})
@某人。
def at(user_id: Union[int, str]) -> 'MessageSegment':
        """@某人。"""
        return MessageSegment(type_='at', data={'qq': str(user_id)})
def at ( user_id : Union [ int , str ] ) -> 'MessageSegment' : return MessageSegment ( type_ = 'at' , data = { 'qq' : str ( user_id ) } )