Hi there,

Python 3.13 is officially here, packed with some seriously exciting upgrades! 🐍

The headline feature? Disabling the GIL (yep, you read that right) is a game changer for multithreaded applications. Plus, the interactive interpreter now has full color support 🎨, making debugging and experimentation even more intuitive.

But that’s just the tip of the iceberg. In this week’s video, I’ll walk you through all the major updates, including:

A boost to garbage collection for faster memory management ⚡
Improvements to package and module handling 📦
Some experimental (but very promising) JIT optimizations for performance 🚀

P.S. And yes, Python 3.14 is just around the corner… should we start calling it Pi-thon? 🍰

Enjoy the video and happy coding!

Cheers,

Arjan

# News

It’s Time to Stop Using Python 3.8

With the release of Python 3.13, it’s the perfect time to consider upgrading—especially if you haven’t been keeping up with recent versions.

If you’re still using Python 3.8, you could be missing out on essential improvements in performance, security, and new features. This article dives into the key reasons to move on from 3.8, outlining the risks of staying on an outdated version and the benefits of upgrading. Read the full article here.

Goodhart's Law in Software Engineering

Ever heard of Goodhart’s Law? It’s more relevant to software engineering than you think! 🤔

Goodhart’s Law states, “When a measure becomes a target, it ceases to be a good measure.” This insightful article explores how this principle plays out in software engineering, from productivity metrics to code quality—and why focusing too much on the wrong targets can lead to unintended consequences. Curious to learn more? Read the full article here.

# Community

Last month, we welcomed 242 new members to the Discord community! I couldn’t be more thrilled to have you all here. A huge thank you to everyone for your amazing contributions to the discussions so far.

If you’re new, don’t forget to pop into the #😎introduce_yourself channel and say hi! 👋 And if you haven’t joined yet, there’s no better time. Click the link below and be part of our growing community:👉 Join ArjanCodes on Discord

Do you enjoy my content on YouTube and would you like to dive in deeper? Check out my online courses below. They've helped thousands of developers take the next step in their careers.

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Watch this week's video