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The Friday Loop

Every Friday, you'll get a recap of the most important and exciting Python and coding news. The Friday Loop also keeps everyone posted on new ArjanCodes courses and any limited offers coming up.

Featured Post

Why You Should Switch to SQLModel for FastAPI Projects | Issue #27

Hi there, Tired of writing the same code over and over when building APIs? With SQLModel, you can define your database schema and your API models in a single place, saving tons of time and reducing errors. ⚡️ But beware—it’s important to avoid exposing sensitive data. In this week’s video, I break down exactly how to use SQLModel with FastAPI, and share a few key lessons on how to do it right. Watch the full video to level up your API game! 🎥Enjoy the video and happy coding! Cheers, Arjan #...

Hi there, Killing a product is tougher than it looks. It’s not just about pulling the plug, it’s about doing it right—for your users, your team, and yourself. In today’s video, I share 5 major lessons from shutting down my last SaaS product, and trust me, it wasn’t all smooth sailing. If you’ve ever had to make a tough choice between projects, or felt like your hard work wasn’t paying off, this one’s for you. I even share a mindset shift that helped me see “failure” differently—and it might...

Hi there, Publishing your Python package should NOT be an obstacle course! In today’s video, I’ll show you how to automate your entire release process with GitHub Actions—yes, from creating a version tag all the way to publishing the package on PyPi. 🛠️ I’ll also cover Trusted Publishers on PyPi, so you can securely authenticate without relying on static API keys. And here’s the BEST part: the workflow is fully customizable, so you can tweak it to fit your exact needs, whether you’re using...

Hi there, Ever struggled with code duplication? It can creep into your projects in ways you’d never expect. 🚨 In this week’s video, I’ll show you some tricky examples of duplicated code that might not be obvious at first glance. 👀 I also explain why simply following the DRY principle can sometimes make things worse. I’ll walk you through a refactor of one such case and even show you an example where not removing duplication is the better choice! Watch until the end of the video for some BONUS...

Hi there, Want to write cleaner and more efficient Python code? I’ve got you covered! In this week’s video, I walk you through 15 Python libraries that will seriously boost your productivity. From cutting project setup time in half with Cookiecutter 🍪 to converting text numbers to digits with Numerizer, these tools are all about making your life easier. You’ll learn how to automate tasks like file monitoring using Watchdog and build modern dashboards with Nicegui! Watch the full video to find...

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...

Hi there, Did you know Git has a ton of hidden features that can seriously level up your coding game? In this week’s video, I explore 10 Git features most developers don't even know about! 😲 From the clever use of Git Notes to the lifesaver that is Git Worktree (ever wish you could work on two branches at once?), I’ve got some cool tips to share. If you're looking for ways to make your Git workflow smoother and more efficient, you don't want to miss this one. Let’s "git" going! 💻💪Enjoy the...

Hi there, Are you stuck choosing between the usual database options like PostgreSQL, MySQL, or MongoDB? It’s time to expand your toolkit! 🚀 In this week’s video, I’ll cover some of the most specialized databases out there! These aren’t your average databases; they’re optimized for specific tasks that can supercharge your software projects. I’ll walk you through how to use these databases with Python, with hands-on examples and tips on how to integrate them into your tech stack. But...

Hi there, This week’s video covers tips you probably haven’t considered—ones that can make or break your code and potentially save you hours of debugging. 🕵️♂️ Today I’m breaking down the art of designing function headers—because a good one makes your life 10x easier, while a bad one… well, you’ll wish you had known sooner. 👨💻 I’ll walk you through the essentials of function naming, and why using verbs in your function names can make all the difference.You’ll also learn how to streamline your...

Hi there, Ever wondered why Python sometimes behaves in unexpected ways? In this week’s video, I’ll be showing you 13 strange things in Python that might just blow your mind! 🤯 Especially the last one—it’s really confusing! From the mysteries of integer caching to the quirks of mutable default arguments, this video is packed with examples that will make you question everything you know about Python. 🐍 P.S. Stay tuned until the end of the video for an awesome Easter egg in Python you might not...