What's New in Python 3.13 - Real Python
Briefly

Python 3.13 introduces major under-the-hood enhancements aimed at improving performance, including advancements in the interactive interpreter and more informative error messages.
By removing the global interpreter lock (GIL) and implementing an experimental Just-In-Time (JIT) compiler, Python 3.13 takes a significant step toward freeing up threading capabilities.
The new features in Python 3.13 include upgrades to the static type system, making it more robust and user-friendly for developers tackling common mistakes.
This course highlights important new capabilities in Python 3.13 that will greatly benefit developers, ensuring they have access to the latest tools and features.
Read at Realpython
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