Learning Python Design Patterns - Second Edition

Chapter 6. The Observer Pattern – Keeping Objects in the Know

In the previous chapter, we started with a brief introduction to Proxy and went ahead to discuss the Proxy design pattern. We understood the concept of the Proxy pattern with a UML diagram and also learned how it's applied in the real world with the help of Python implementations. You learned about the ups and downs of the Proxy pattern with the FAQ section.

In this chapter, we will talk about the third type of design pattern—the behavioral design pattern. We will be introduced to the Observer design pattern, which falls under the hood of Behavioral patterns. We will discuss how the Observer design pattern is used in software application development. We will work with a sample use case ...