Python rabbitMQ如何实现生产消费者模式

以下是Python rabbitMQ如何实现生产消费者模式的完整攻略，包含两个示例说明。

示例1：简单队列模式

步骤1：安装pika库

在使用Python操作RabbitMQ时，您需要安装pika库。您可以使用以下命令进行安装：

pip install pika

步骤2：发送消息

import pika

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

channel.queue_declare(queue='my_queue')

message = 'Hello World!'
channel.basic_publish(exchange='', routing_key='my_queue', body=message)

print("Message sent: ", message)

connection.close()

步骤3：接收消息

import pika

def callback(ch, method, properties, body):
    print("Received message: ", body)

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

channel.queue_declare(queue='my_queue')

channel.basic_consume(queue='my_queue', on_message_callback=callback, auto_ack=True)

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

步骤4：运行程序

运行发送消息的程序后，您将看到以下输出：

Message sent:  Hello World!

运行接收消息的程序后，您将看到以下输出：

Waiting for messages. To exit press CTRL+C
Received message:  b'Hello World!'

示例2：工作队列模式

步骤1：安装pika库

同示例1。

步骤2：发送消息

import pika

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

channel.queue_declare(queue='my_queue', durable=True)

message = 'Hello World!'
channel.basic_publish(exchange='', routing_key='my_queue', body=message, properties=pika.BasicProperties(delivery_mode=2))

print("Message sent: ", message)

connection.close()

步骤3：接收消息

import pika
import time

def callback(ch, method, properties, body):
    print("Received message: ", body)
    time.sleep(5)
    print("Message processed")

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()

channel.queue_declare(queue='my_queue', durable=True)

channel.basic_qos(prefetch_count=1)
channel.basic_consume(queue='my_queue', on_message_callback=callback)

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

步骤4：运行程序

运行发送消息的程序后，您将看到以下输出：

Message sent:  Hello World!

运行接收消息的程序后，您将看到以下输出：

Waiting for messages. To exit press CTRL+C
Received message:  b'Hello World!'
Message processed

以上就是Python rabbitMQ如何实现生产消费者模式的完整攻略，包含两个示例说明。