The State Pattern Done the Pythonic Way
🧱 Build software that lasts. Join the Software Design Mastery waiting list → https://arjan.codes/mastery.
The classic State design pattern is often implemented with many small classes and heavy inheritance. In this video, I show a different approach.
I start with the traditional object-oriented version and then refactor it into a generic, data-driven state machine using Python features like decorators, enums, and generics. The result is a clean, reusable engine where transitions are explicit and easy to understand.
🔥 GitHub Repository: https://git.arjan.codes/2026/state.
🎓 ArjanCodes Courses: https://www.arjancodes.com/courses.
💬 Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
🔖 Chapters:
0:00 Intro
3:24 Why This Matters
4:11 Step 1 — The Traditional Class-Based State Pattern
4:57 Step 2 — Realization: This Is Just a Lookup Table
5:21 Step 3 — Extracting a Generic StateMachine
17:35 Step 4 — Making Transitions Declarative with a Decorator
20:37 Step 5 — Supporting Multiple From States
24:05 The Payment Class Becomes Boring (In a Good Way)
25:30 When To Use This vs Classic OO
25:54 Final Thoughts
#arjancodes #softwaredesign #python
Sur cette page du site, vous pouvez voir la vidéo en ligne The State Pattern Done the Pythonic Way durée heure minute seconde en bonne qualité , qui a été Téléchargé par l'utilisateur ArjanCodes 10 avril 2026, Partagez le lien avec vos amis et connaissances, sur youtube cette vidéo a déjà été regardée 42,287 fois et il a aimé 1.6 mille téléspectateurs. Bon visionnage!
