在类中使用 on_log 回调查找 MQTT PUBACK 失败，但它在平面脚本中工作

Question

第一个脚本有效，这意味着调用回调并结束打印 puback:  True我使用类A来完成工作的第二个脚本不起作用。回调不会被调用，它以a.puback:  False我不确定我的问题是否是回调不能以这种方式工作，在这种情况下，我怎样才能让我的班级使用这些 Paho MQTT 回调？或者如果它是更微妙的东西。作品：def on_log_puback(client, userdata, level, buf):    global puback    if 'PUBACK' in buf:        puback = True        print "PUBACK!"def on_connect(client, userdata, flags, rc):    print "Connect code: ", rcdef on_disconnect(client, userdata, flags, rc=0):    print "Disconnect code: ", rcdef on_message(client, userdata, msg):    print "    Message: ", str(msg.payload.decode("utf-8", "ignore"))def stop():    print ("stopping loop")    client.loop_stop()    print "disconnecting"    client.disconnect()import paho.mqtt.client as mqtt import timeclient     = mqtt.Client("Luke, I am your client") mqtt.Client.connected_flag = False client.on_connect     = on_connect  client.on_disconnect  = on_disconnectclient.on_log         = on_log_puback client.on_message     = on_messagestatus = client.connect(host="test.mosquitto.org",                        keepalive=60, port=1883)print "connect status: ", statustime.sleep(2)print "loop_start"client.loop_start()time.sleep(1)sret = client.subscribe("test_topic")print "subscribe returns sret: ", srettime.sleep(2)# initialize globalpuback = False# test publish with qos=1status, msg_id = client.publish(topic="test_topic",                                payload="hello!",                                qos=1, retain=True)   print "publish status: ", statustime.sleep(2)print "puback: ", pubackstop()不工作：import paho.mqtt.client as mqtt import timeclass A(object):    def __init__(self):        client                = mqtt.Client("Luke, I am your client")         self.client           = client        mqtt.Client.connected_flag = False        client.on_connect     = self.on_connect          client.on_disconnect  = self.on_disconnect        client.on_log         = self.on_log_puback         client.on_message     = self.on_message

Answer 1

找到了。当我将回调移动到类中时，例如on_log_puback(self,...)我只是忘记添加self到参数的开头。有了这个，它现在工作得很好。