basic_consume() got multiple values for keyword argument 'queue'

最新推荐文章于 2023-05-09 19:56:47 发布

原创最新推荐文章于 2023-05-09 19:56:47 发布 · 9.2k 阅读

1 ·

CC 4.0 BY-SA版权

rabbitmq 专栏收录该内容

2 篇文章

订阅专栏

本文解决了一个在使用Python与RabbitMQ进行消息队列操作时遇到的问题，详细介绍了如何正确地消费消息，并提供了在Docker环境下配置RabbitMQ服务器及Python虚拟环境的步骤。

在看RabbitMQ实战高效部署分布式消息队列这本书的时候出现的问题。

把

channel.basic_consume(msg_consumer, queue="hello-queue", consumer_tag="hello-consumer")

改成

channel.basic_consume("hello-queue", msg_consumer, consumer_tag="hello-consumer")

就好了，哎是源码里面参数的位置变了。

这个是抄自stackoverflow上的回答，虽然也没有什么用。

https://stackoverflow.com/questions/50404273/python-tutorial-code-from-rabbitmq-failing-to-run

I can't reproduce your error, but I want to be as concise as possible, when trying to.

At first I set up a rabbitmq server as docker container on my computer, not to pollute my system:

$ docker run -d --hostname localhost --name some-rabbit rabbitmq:3

Then I use inspect to find about the IPAddress my rabbitmq container is running actually:

$ docker inspect some-rabbit --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}'
172.17.0.2

Next I use pipenv to create a virtual environment in python3 that contains at least pika and dependencies to follow the example:

$ mkdir example && cd example && pipenv --three install pika
Creating a virtualenv for this project…
Using /usr/bin/python3 (3.6.5) to create virtualenv…

Note, that you can also use python 2.7 here if you say pipenv --two when installing pika.

Then jump into the environment using pipenv shell:

~/example$ pipenv shell
Spawning environment shell (/bin/bash). Use 'exit' to leave.

There I create the two files send.py and receive.py as proposed by the example documentation of pika, but I'll replace the localhost by the docker containers IP from above:

$ cat send.py 
#!/usr/bin/env python 
import pika

connection = pika.BlockingConnection(pika.ConnectionParameters(host='172.17.0.2'))
channel = connection.channel()


channel.queue_declare(queue='hello')

channel.basic_publish(exchange='',
                      routing_key='hello',
                      body='Hello World!')
print(" [x] Sent 'Hello World!'")
connection.close()

And receive.py:

$ cat receive.py
#!/usr/bin/env python
import pika

connection = pika.BlockingConnection(pika.ConnectionParameters(host='172.17.0.2'))
channel = connection.channel()


channel.queue_declare(queue='hello')

def callback(ch, method, properties, body):
    print(" [x] Received %r" % body)

channel.basic_consume(callback,
                      queue='hello',
                      no_ack=True)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

Having receive.py running in one terminal and running send.py in another works as expected:

 $ python receive.py 
 [*] Waiting for messages. To exit press CTRL+C

 $ python send.py
 [x] Sent 'Hello World!'

 $ python receive.py 
 [*] Waiting for messages. To exit press CTRL+C
 [x] Received b'Hello World!