Python TypeVar and Generic Types explained

In this video, I explain Python Generics and TypeVar in great detail, why they are better than type 'Any', and provide 2 practical examples. You’ll learn how to write cleaner, more flexible, and type-safe code by leveraging type hints. Also, I compare the syntax for defining generic types before Python 3.12 and from 3.12+. This video is perfect for anyone trying to level up their Python skills. 🔍 What’s covered: 0:00 What is TypeVar, type variable, generic typing, and what are they used for 0:33 Examples walk-through. Enabling type checking in VsCode 1:17 Example 1: Creating a generic function. TypeVar vs Union of Types 5:12 What I struggled with when I learned about generic typing in Python 5:51 Example 2: Implementing a generic queue class from scratch 10:56 Testing the generic queue 11:58 Comparing syntax before and after Python 3.12 13:44 How to constrain TypeVar to certain types 14:31 Testing the numeric queue 15:52 Something that I couldn't figure out about... (help needed) 18:00 Type aliases before and after Python 3.12 19:20 Outro 📂 Code on GitHub: 👉 https://github.com/eukosh/jad-example... 💬 What’s your take on generics in Python? Did this video help make it clearer for you? 🐍 More Python content coming soon, follow for more! ========= Hi friend, my name is Eugene and I'm just a dev 👨🏼‍💻 I've been in tech for 5 years, working as a Data Engineer 📊 Join me on this journey, and let’s build an honest, open, supportive, authentic dev community of learners and builders.