Observer Pattern Tutorial: I NEVER Knew Events Were THIS Powerful 🚀

💡 Learn how to design great software in 7 steps: https://arjan.codes/designguide. This tutorial on the observer pattern is the fourth part of my series on how to write better Python code, I show you how to use events to write code that's really easy to change and extend. Events are a variant of the observer / listener design pattern. This video is inspired by a real-life example I recently encountered, where implementing an event-based approach provided a great solution to a design problem I had. Next to showing how to use events in your code, you'll also see what the effect is on the cohesion and coupling of the functions you write. You can find the code I worked on in this episode in my GitHub repository: https://github.com/arjancodes/betterpython 🎓 ArjanCodes Courses: https://www.arjancodes.com/courses/ 🔖 Chapters: 0:00 Intro 1:24 Explaining the code example 3:16 Analysis 4:45 Creating a simple event handler 7:19 Moving to an event-based approach 10:40 The complete solution 12:44 The power of an event-based system 14:12 Final thoughts