Welcome! In this unit, we will delve into implementing Pub/Sub for notifications within our Redis-based backend system project. You've already learned how to manage user data, handle transactions, and use streams for event logging. Now, we'll add another powerful feature to our project: real-time notifications using Redis Pub/Sub (publish/subscribe). This will enable our system to send and receive messages instantaneously.

In this unit, we'll focus on creating a simple real-time notification system using Redis Pub/Sub. Specifically, we'll cover:

1. Publishing Messages: How to send notifications.
2. Subscribing to Channels: How to receive and handle notifications.

Here is a quick refresh of how Pub/Sub works in Redis:

In this snippet, message_handler processes incoming messages on the chat_room channel. The subscribe_to_channel function sets up the subscription and runs it in a separate thread. The publish_message function sends a message to the specified channel, which is then received by the message_handler and printed to the console.

Exciting, isn’t it? Now, it's time to put this into practice. Let's implement the complete code to build our real-time notification system.

Happy coding!