class AAA(type):     def __init__(self,name,father,data):         print('haha')         super(AAA, self).__init__(name,father,data)     def __call__(self, *args, **kwargs):         print('------==')         cc = object.__new__(self)         self.__init__(cc, *args, **kwargs)         print('++')         return cc class MySQL(object,metaclass=AAA):     def __init__(self,host,port):         self.host=host         self.port=port         print('fdsf')     # @classmethod     # def from_conf(cls):     #     print(cls)     #     return cls(settings.HOST,settings.PORT)     def __call__(self, *args, **kwargs):         print('-aaa-----==')     print('aaaa') MySQL('111',33)