python中mqtt的msg.payload.split失败。如何修复？

我已经创建了一个MQTT类。它确实连接良好，并在连接时发布“在线”消息。然而，on_message方法出现了一些问题，因为它启动时无法拆分有效负载

class mqtt_function():
    def __init__(self):
        self.mqttc = mqtt.Client()
        # MQTT settings here
        self.mqttc.loop_forever()
    def on_connect(self, client, userdata,flags, rc):
        message = "connected with rc: " + str(rc)
        self.mqttc.subscribe(self.topic, 2)
        print("subscribed to ", self.topic)
        self.mqttc.publish(self.topicStatus, "Online", 1, True)
    def on_message(self, client, obj, msg):
        print("on_message method started")
        print(msg.payload)
        info = msg.payload.split(",")
        print("message was split")

返回

subscribed to commands/home
on_message method started
b'60,1581638400'

期望：

---

msg.payload.split应该用逗号将有效负载消息分隔到名为info的列表中。然而，这并没有发生

问题在于理解msg.payload格式

虽然print（msg.payload）返回一个清晰的文本，但msg.payload不是字符串，而是ASCII码。将msg.payload从ASCII转换为字符串后，可以使用.split函数。 以下是mqtt有效负载的工作转换

    def on_message(self, client, obj, msg):
        characters = [chr(ascii) for ascii in msg.payload] # Convert ASCII to char
        chars_joined = ''.join(characters) # Join chars to a string
        received_message = chars_joined.split(",")     # Split string by comma