class ChatWebSocket(tornado.websocket.WebSocketHandler):    clients = []    def open(self):        ChatWebSocket.clients.append(self)        self.write_message(self)          def on_message(self, message):        print(self)        self.write_message('{"a":"SDF"}')     def on_close(self):        ChatWebSocket.clients.remove(self)我想將self對象轉(zhuǎn)換為json并將其發(fā)送給客戶端，以便我可以識別請求 on_message并將消息傳遞給適當?shù)目蛻舳恕?