Summary

In this chapter, we discussed the elements of event-driven programming. We started with the most common examples and applications of event-driven programming to better introduce ourselves to this programming paradigm. Then, we precisely described the three main styles of event-driven programming, callback-based style, subject-based style, and topic-based style. There are many event-driven design patterns and programming techniques, but all of them fall into one of these three categories. The last part of this chapter focused on event-driven programming architectures.

With this chapter, we end something that we could call an "architecture and design arc." From now on, we will be talking less about architecture, design patterns, programming, and paradigms and more about Python internals and advanced syntax features.

The next chapter is all about metaprogramming in Python, that is, how to write programs that can treat themselves as data, analyze themselves,...