💡 Learn how to design great software in 7 steps: https://arjan.codes/designguide.
Sometimes it's good to talk about what not to do when designing software. In this video, I talk about the singleton and object pool patterns, both of which are object creation design patterns. I'll show you how they work in Python and discuss why the singleton pattern in particular is something you shouldn't use. The object pool can be considered a generalization of the singleton pattern, and it has its uses, but it has a few caveats.
- About singletons in Python: https://stackoverflow.com/questions/6760685/creating-a-singleton-in-python
You can find the code I worked on in this episode in my GitHub repository: https://github.com/arjancodes/betterpython
🔖 Chapters:
0:00 Intro
0:28 Design pattern categories
1:14 The singleton
2:42 Singleton code example
5:38 Why singletons are an anti-pattern
6:47 The object pool
7:33 Object pool code example
11:34 Object pool with context manager
13:20 Limitations and caveats of the object pool
14:32 Gag reel
#arjancodes #softwaredesign #singleton
