Python-сообщество

 class Server(Subject):
    def __init__(self):
        self._state = None
        self._observers = []
        self.users_ip = []
        self.users_port = []
        self.Users = UserDB()
        self.attach(CLient_socket)
        self.start_server()   
 
def attach(self, observer):
        print("Subject: Attached an observer.")
        self._observers.append(observer)
    def detach(self, observer):
        self._observers.remove(observer)
    def send_data(self, data, connection): #обновление и уведомление клиента
        send_ip = (self.Users.get_ip_by_id(data['to']))
        Json_str = json.dumps(data, ensure_ascii=False).encode("utf-8")
        i = self.users_ip.index(send_ip)
        connection.sendto(Json_str, (self.users_ip[i], self.users_port[i]))
        self._observers[i].get_data(self) #get_data - метод клиента здесь и возникает ошибка

 class CLient_socket(Observer, Subject): #одновременно издатель и наблюдатель
    def __init__(self):
        from main import Massenger
        self._observers = []
        self.attach(Massenger)
        self.Client_socket = socket.socket()
    def get_data(self):
        data = self.Client_socket.recv(1024)
        if not data:
            return 0
        else:
            self._observers[0].render_messages(self, data)
    def attach(self, observer):
        print("Subject: Attached an observer.")
        self._observers.append(observer)
    def detach(self, observer):
        self._observers.remove(observer)

 self._observers[i].get_data(self)

  Тоесть в итоге self._observers[i].get_data(self) разворачивается в CLient_socket.get_data(<class_Server_instance>)