What are the best open source Python projects to read for learning?

Reading code is useful, but remember that practicing what you learn is key. Don't just read—get coding!

It really depends on what aspects you want to learn:

For clean architecture and best practices, check these out:
- **Requests**: Very readable with great API design.
- **Flask**: You can digest the entire codebase in just a day.
- **Rich**: Beautiful code with excellent documentation.

If you're looking for more real-world complexity:
- **FastAPI**: Great use of modern patterns and type hints.
- **Django**: Larger but well-organized, perfect to see how big projects are structured.

For fun and interesting projects:
- **youtube-dl/yt-dlp** for web scraping.
- **Black**: A code formatter with interesting parsing logic.
- **Httpie**: A textbook example of good CLI design.

For a fruitful start, find a small library you regularly use. Read the README first, then follow the main entry point. Focusing on a single feature you use can be way more effective than trying to read an entire codebase.

Reading code from other developers is a super underrated method for improving your skills. When I was starting out, I wish I had a guide on which projects to check out. Here are a few that really helped me:

- **Requests** by Kenneth Reitz: It's clean and well-structured, showing how a real library manages edge cases without excess complexity.
- **Flask**: Small enough to read entirely in a weekend, this one really teaches you about web frameworks.
- **Rich**: This project showcases elegant Python with solid separation of concerns.

If you're into data handling, you could look into **Pandas**, but it's a bit dense, so maybe save that for later. A key takeaway is to not just read the code but to focus on one function at a time, understand it fully, and then try to rewrite it from memory. That's where true learning occurs!

Try looking through your local **lib/site-packages** directory for the code of the packages you've installed via pip. Many are short and easier to understand than sprawling codebases. You could start by searching for a keyword like "parser" for something random to explore.

I recommend checking out **Home Assistant**! It's a great project with a lot of practical applications.