profile

The Friday Loop

13 Reasons Why Python Is Really WEIRD | Issue #18

Published about 1 year ago • 2 min read

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 know about! 🎁
​
Enjoy the video and happy coding!

​

Cheers,

Arjan

# News

We've Added More Subtitles

Great news! Due to popular demand, all my courses now have English, French, German, Italian, Portuguese, and Spanish subtitles. And this is just the beginning – my team and I are working on adding even more languages in the future. If you’re interested in checking them out, click here and choose a course! 💃🏻🎉

Episode 3 of Under the Hood is live!

In this week’s livestream, we dove deep into the code and design of another popular open-source project.

As usual, you got to see my unfiltered, real-time reactions—no edits, no sugarcoating. Plus, I tackled some of your burning questions along the way. 🔥

Curious about which open-source library we explored this time? Want to sharpen your skills and see how quality software is really built? Check out the livestream now! 👨🏻‍💻

# Community

Are you passionate about programming, especially with Go? Do you want to dive deep into topics like threading models (1:1, N:1, M), the Go runtime scheduler, system calls and their impact on concurrency, lock-free algorithms, and CPU cache coherency protocols? 🖥️

Our Discord members are having a fantastic discussion about these advanced concepts, exploring how the Go runtime manages concurrency, the challenges of system calls, and much more!

Don’t miss out on this chance to connect with like-minded enthusiasts. Click here to join the conversation now! 🚀

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.

🚀 The Mindset Online Course Series

The goal of this series is to help junior developers grow their skills to become senior developers faster.

💥 Other Courses

💡 If you’re part of a development team at a company, I offer special packages for companies that give your team the tools to consistently write high-quality code and dramatically increase your team's productivity.

🪄 Learntail

My team and I created an AI quiz generator designed to accelerate your learning, called Learntail. You can try it for free or unlock even more capabilities and features with the monthly subscription. Take a look here.

​Unsubscribe | Send by ArjanCodes

Wolvenplein 25, Utrecht, UT 3512 CK

The Friday Loop

by ArjanCodes

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.

Read more from The Friday Loop

Hi there, If you’ve been learning Python for a while and still feel like you’re not improving, you’re not alone. Python feels easy at first. The syntax is clean, the barrier to entry is low, and you can build something useful in your first hour. But then… things get weird. You hit a wall. There’s object-oriented programming. Then functional programming. Then decorators, dunder methods, typing, Protocol, mypy, async… And somehow Python lets you write the same thing five different ways, and...

2 days ago • 1 min read

Hi there, You’ve probably heard developers say "That’s not very Pythonic…" But what is Pythonic code, really? Is it about using list comprehensions? Avoiding for-loops? Dressing up like Guido van Rossum? In this week’s video, I answer that question by taking a small, messy Python script and refactoring it step-by-step using the principles behind idiomatic Python. Along the way, I’ll show you what it means to think like a Python developer, using things like: Functions instead of unnecessary...

9 days ago • 1 min read

Hi there, Have you ever found yourself writing functions like this? def render_article(article_id, db, logger, user, config, feature_flags, etc): …and then passing the same parameters through five different layers of your app? In my latest video, I walk through a realistic Python example and show how to fix this mess using the Context Object Pattern. I’ll start with the "before" version, refactor step by step, and explore: How to group related dependencies using a context object When this...

16 days ago • 1 min read