Tired of if-elif chains? Here’s a cleaner way to write your code | Issue #75


Hi there,

When I see an if-statement with multiple elifs in my code, it almost always triggers an investigation. Is there some way to rewrite this to make the logic simpler? Is there a chance that in the future I'll need to add even more complexity? If so, I'll try to redesign the code so that I don't need that chain of if-elif statements.

In this week’s video, I cover a design pattern that helped me eliminate many of those chains from a project + at the same time made the code easier to test, extend, and read.

It’s called the Registry Pattern. The basic version of it is simple to implement, and I show a quick example of that in the video, using exporters.

But the cool thing is that there's another level to this pattern that leads to incredible flexibility. I've used the pattern in this way in many of my previous projects and it always delivers.

This is the next video in my brand new Design Patterns series. There's a lot more where this is coming from - I'm really excited about the next batch of videos coming to you soon.

Hope you enjoy this video and wish you an awesome weekend!

Cheers,

Arjan


Do you enjoy my content on YouTube and would you like to dive in deeper?

🚀 Check out my online courses

My courses have helped thousands of developers take the next step in their careers. Check out these courses to help grow your skills and become a senior developer:

👕 Clean code and clean clothes

The ArjanCodes merch store features T-shirts, hoodies, hats, and more for the clean-code-obsessed. Careful though: you'll look dangerously professional while reviewing PRs.

👉 Check out the store here and grab something before your stand-up call starts.

🔧 Need help with a complex codebase?

If your team is struggling with tech debt, unclear architecture, or cloud costs that keep creeping up, my team and I can help. We don’t just review, we get in and fix things. We’re only working with a few companies at a time to stay focused, so if it sounds like a fit:

Unsubscribe | Send by ArjanCodes

Wolvenplein 25, Utrecht, UT 3512 CK

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.

Read more from The Friday Loop

Hi there, I just published a new video about Python 3.14, and no, it’s not just about the version number lining up with π (though that does make me feel more complete). The new release brings a bunch of improvements, but I decided to focus on the features I personally love and that I actually use in my day-to-day work. Here’s what I cover in the video: A small but beautiful improvement to exception syntax (fewer parentheses!) Native Zstandard compression with way better performance than gzip...

Hi there, When you start a new Python project, it often begins as a single file. Before you know it, that file turns into a tangle of routes, configs, and ad-hoc fixes. Scaling that into something a team can maintain is tough. In my latest video, I show you the anatomy of a scalable Python project. We’ll cover folder structure, config management, logging, testing, and how to set up pyproject.toml, .python-version, Docker, and docker-compose for smooth local and production environments. I’ll...

Hi there, You’ve probably heard of the SOLID principles... and maybe even felt guilty for not applying them more. But how useful are they really when you’re writing Python? In my latest video, I take a simple but realistic example and implement it three ways: A messy, all-in-one class that gets the job done A cleaner, class-based version that follows SOLID principles A lightweight, functional approach that may be more Pythonic In the end, the important thing is to understand where design...