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Ever wondered how to build a clean Python SDK without a giant god class? In this video, I’ll show you how I designed an SDK that uses multiple layers of inheritance to keep your code DRY and easy to scale.

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🔥 GitHub Repository: https://git.arjan.codes/2025/sdk.

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🔖 Chapters:
0:00 Intro
0:33 Our Test API
2:30 Building the SDK
4:46 What NOT to Do – Avoid the God Class
6:18 Squarespace Sponsored Section
8:05 Option 1 – Pass the Client (Dependency Injection)
11:33 Option 2 – Global Client (Singleton-style Import)
14:12 Design Issues
15:23 The BaseAPIModel
18:15 The User Model Becomes Simple
18:55 Using the Model
20:40 Pros and Cons of This Pattern
21:37 Want to Go Further?
22:32 Final Thoughts

#arjancodes #softwaredesign #python

I Designed a Python SDK That Relies on… Deep Inheritance?!