What messaging systems have you used in your practice?

In Python development practice, the following message exchange systems are often used:

• RabbitMQ — a message broker supporting various protocols, often used with the pika library.
• Apache Kafka — a distributed data streaming platform suitable for processing large volumes of messages.
• Redis Pub/Sub — a simple publish/subscribe mechanism, often used for quick message passing within a single application.
• Celery — a distributed task system that uses message brokers (RabbitMQ, Redis) for asynchronous task execution.

Example of using RabbitMQ with pika:

import pika

connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()
channel.queue_declare(queue='task_queue')

channel.basic_publish(exchange='', routing_key='task_queue', body='Hello World!')
connection.close()

The choice of system depends on performance requirements, reliability, and application architecture.