modify the program so that this “b” no longer appears:import paho.mqtt.client as mqtt def on_connect(client,userdata,flags,rc): print("Connected with result code"+str(rc)) client.subscribe("hello/#") def on_message(client,userdata,msg): print(msg.topic+" "+str(msg.payload)) client=mqtt.Client() client.on_connect=on_connect client.on_message=on_message print("Connecting") client.connect("localhost",1883,60) client.loop_forever()
时间: 2024-04-11 15:28:09 浏览: 306
Android.permission.MODIFY_PHONE_STATE权限问题解决办法
The "b" in the output can be removed by decoding the byte payload into a string. Here's the modified code:
```python
import paho.mqtt.client as mqtt
def on_connect(client, userdata, flags, rc):
print("Connected with result code " + str(rc))
client.subscribe("hello/#")
def on_message(client, userdata, msg):
print(msg.topic + " " + msg.payload.decode('utf-8')) # Decode the byte payload to string
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
print("Connecting")
client.connect("localhost", 1883, 60)
client.loop_forever()
```
By using the `decode('utf-8')` method on the `msg.payload`, we convert the byte payload to a string using the UTF-8 encoding. This ensures that the output no longer includes the "b" indicating a byte literal.
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