线程中的回调函数（PySNMP）阻止其他线程启动

Question

我在主线程中尝试了这个例子PySNMP Trap Receiver，一切正常，但是当我以多线程作为第一个线程启动它时，我无法启动其他线程。你知道吗

1. 如果我发送一个陷阱，所有其他线程都会成功启动，如果没有陷阱，除了陷阱接收器，其他任何东西都不能工作。你知道吗
2. 我试过loop.call_soon_threadsafe，没用

    def _callback_func(self, snmpEngine, stateReference, contextEngineId, contextName,
                       varBinds, cbCtx):
            execContext = snmpEngine.observer.getExecutionContext(
                        'rfc3412.receiveMessage:request')
            source = (execContext['transportAddress'][0])  # source
            trap_oid = varBinds[1][1]
            value = varBinds[2][1]
            trap=[]
            trap.append(source)
            trap.append(trap_oid)
            trap.append(value)
            self.q.put(trap)
            self.logger.warning(f"[SNMPTRAP] Received trap:{source}, {trap_oid}, {value}")

    def _receiver(self):
            try:
                # Register SNMP Application at the SNMP engine
                ntfrcv.NotificationReceiver(self.snmpEngine, self._callback_func)
                self.loop.run_forever()

            except Exception as e:
                self.logger.exception(str(e))

    def _configure(self):
        return self

    def start(self):
        self.worker = Thread(target=self._receiver)
        self._configure()
        try:
            self.logger.info("Starting thread 'trap receiver'...")
            self.worker.start()
            if self.worker.is_alive():
                self.logger.info("Thread 'trap_receiver' started")
                while True:
                    data = self.q.get()
                    self.logger.debug(f"Returned trap {data}")
                    return data
            else:
                self.logger.error("Couldn't start thread 'trap receiver'")
        except Exception as e:
            self.logger.error(f"An exception occured while starting thread 'trap receiver' {str(e)}")