pika,stop_consuming不起作用

我是rabbitmq和pika的新手,并且在停止消费方面遇到了麻烦.

通道和队列设置:

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()
channel.queue_declare(queue=new_task_id, durable=True, auto_delete=True)

基本上,消费者和生产者是这样的:

消费者:

def task(task_id):
    def callback(channel, method, properties, body):
        if body != "quit":
            print(body)
        else:
            print(body)
            channel.stop_consuming(task_id)

    channel.basic_consume(callback, queue=task_id, no_ack=True)
    channel.start_consuming()
    print("finish")
    return "finish"

制片人:

proc = Popen(['app/sample.sh'], shell=True, stdout=PIPE)
while proc.returncode is None:  # running
    line = proc.stdout.readline()
    if line:
        channel.basic_publish(
            exchange='',
            routing_key=self.request.id,
            body=line
        )
    else:
        channel.basic_publish(
            exchange='',
            routing_key=self.request.id,
            body="quit"
        )
        break

消费者task给了我输出:

# ... output from sample.sh, as expected

quit
?}q(UstatusqUSUCCESSqU  tracebackqNUresultqNUtask_idqU
1419350416qUchildrenq]u.

但是,"finish"没有打印,所以我猜它是因为channel.stop_consuming(task_id)没有停止消费.如果是这样,那么正确的方法是什么？谢谢.