rabbitMQ简单配置及OSError: [Errno 9] Bad file descriptor问题

写在前面，rabbitmq因为版本问题，传入的参数的位置可能不同，可以查看源码，一一对应进行传入。

send.py

# encoding: utf-8
# Date: 2019/11/25 20:43


__author__ = 'ryan.liu'

import pika


def test(hash_value):
    # 1， 连接RabbitMq服务器
    rabbit_username = 'admin'
    rabbit_password = 'admin'
    credentials = pika.PlainCredentials(rabbit_username, rabbit_password)
    connection = pika.BlockingConnection(
        pika.ConnectionParameters(host='127.0.0.1', port=5672, credentials=credentials))

    # channel是进行消息读写的通道
    channel = connection.channel()

    # 2，创建名为queue的队列
    channel.queue_declare(queue='queue')

    # 3，配置basic_pulish
    channel.basic_publish(
        '',
        'queue',
        hash_value)

    # 4，关闭连接
    connection.close()
    # return make_response({})

receive.py

# encoding: utf-8
# Date: 2019/11/25 20:43

__author__ = 'ryan.liu'

import pika

rabbit_username = 'admin'
rabbit_password = 'admin'
credentials = pika.PlainCredentials(rabbit_username, rabbit_password)
connection = pika.BlockingConnection(pika.ConnectionParameters(host='127.0.0.1', port=5672, credentials=credentials))
channel = connection.channel()

# 声明队列
channel.queue_declare(queue='queue')


# 3，定义一个回调函数，当获得消息时，Pika库调用这个回调函数来处理消息
def callback(ch, method, properties, body):
    print("receive.py: receive message", body)


# 4，从队列接收消息
# channel.basic_consume(
#     queue='queue',
#     callback,
#     no_ack=True)

channel.basic_consume(
    "queue",
    callback,
    auto_ack=True
)

# 5，等待消息
channel.start_consuming()

今天犯了个错，导致mq一直报错，错误提示为：

OSError: [Errno 9] Bad file descriptor

错误代码如下：

rabbit_username = 'admin'
rabbit_password = 'admin'
credentials = pika.PlainCredentials(rabbit_username, rabbit_password)
connection = pika.BlockingConnection(
  pika.ConnectionParameters(host='127.0.0.1', port=5672, credentials=credentials))

channel = connection.channel()

channel.queue_declare(queue='queue')

def test(hash_value):
    channel.basic_publish(
        '',
        'queue',
        hash_value)

    connection.close()
    # return make_response({})

这是python基础的作用域的问题。