Currently, C embedded python function is used
The python function is a blocking type of receiving server messages
There will be no return value until the monitoring is exited
A callback function of python will be called when receiving a message during monitoring , you can get the received message
So how to return the message to C

EDIT:
The code is as follows callback printing can print correct data. The problem is
The rabbitMQ client written using the pika library here is to avoid using the C library of
rabbitMQ
Now there is a consideration that is to Write a python-adjustable module
in C and then adjust it in the callback function, but it feels a bit ugly.

#!/usr/bin/env python import pika import sys message = "" def callback(ch, method, properties, body): message = body print(method.routing_key) return message def consume(): connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost')) channel = connection.channel() result = channel.queue_declare(exclusive=True) queue_name = result.method.queue channel.queue_bind(exchange='normalEx', routing_key='remote', queue=queue_name) print(' [*] Waiting for logs. To exit press CTRL+C') channel.basic_consume(callback, queue=queue_name, no_ack=True) channel.start_consuming()