Question

我不想每次导入MQTT客户端对象时都会创建一个新实例。我不太了解Paho MQTT库，但是我想通过单个MQTT客户端对象执行所有任务。

#mqtt.py
import paho.mqtt.client as mqtt

#The callback for connecting to CloudMQTT broker
def on_connect(client, userdata, flags, rc):
    print("Connecting to CloudMQTT broker: "+ mqtt.connack_string(rc))

# The callback for when a PUBLISH message is received from the server.
def on_message(client, userdata, message):
    print("Received message '" + str(message.payload) + "' on topic '"
        + message.topic  + "' with QoS " + str(message.qos))


client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.username_pw_set('****', '****')
client.connect('****', ****),

我的第一个终端机控制台：

>>> from mqtt import client
>>> client
<paho.mqtt.client.Client object at 0x7fc7c4e3ce48>

我的第二个终端控制台：

>>> from mqtt import client
>>> client
<paho.mqtt.client.Client object at 0x7f437ea56e48>

Paho MQTT客户端导入？

0 个答案: