Jujens' blog - Programmation

My shell config

Julien Enselme — Sun, 14 Sep 2025 00:00:00 +0200

I discovered a lot of tools this year, most of them I now rely on daily. So I thought it would be a nice time to share them with various custom configs I wrote.

TL;DR: install zoxide, direnv, starship and atuin and have this in your .zshrc (or .bashrc …

My opinion on Django Ninja

Julien Enselme — Sun, 06 Jul 2025 00:00:00 +0200

If you’re using the Django web framework (DRF) and are building APIs, you probably know about the Django Rest Framework a toolkit to build APIs in Django since more than a decade (the first 3.x version was release in 2014). It’s great and I’ve used it …

My opinions on HTMX

Julien Enselme — Tue, 24 Jun 2025 00:00:00 +0200

HTMX is a JavaScript library designed to add interactivity to your web pages. With it, you don’t build a single page application, you use standard templates (written in Django, Jinja) rendered in your backend, add attributes to your HTML elements and let HTMX add the appropriate interactivity. From what …

Simply how licenses are applied to your project with SPDX and reuse

Julien Enselme — Sun, 22 Jun 2025 00:00:00 +0200

SPDX (Software Package Data Exchange) is a project managed by the Linux foundation created to standardize how licenses are identified in a human and machine readable way. In a nutshell, instead of adding a big header to your files to identify the applicable license, you apply a copyright text and …

Promise returned by async functions

Julien Enselme — Sat, 24 May 2025 00:00:00 +0200

Recently at work, I encountered a problem with a function that should have returned a custom promise subclass. The goal of this subclass is to be able to call a cancel method to cancel some pending action done within the promise and then reject it. It looks like this:

class …

Using Pydantic models within enums

Julien Enselme — Sat, 26 Apr 2025 00:00:00 +0200

In previous articles, I provided some tips on enums and explained how to use a custom class with Pydantic. Now, I’ll dig into all kinds of enum usages with Pydantic, including enums whose members are Pydantic models themselves! Let’s dive right in!

Just like before, you can access …

Using Pydantic with custom classes

Julien Enselme — Sat, 19 Apr 2025 00:00:00 +0200

Pydantic is an awesome data validation library for Python. It’s getting very popular these days because it’s fast, has lots of features and is pleasant to use. I’m using it at work and it personal projects. It’s one of the strong points of FastAPI, the new …

Some tips on Python’s enums

Julien Enselme — Sat, 12 Apr 2025 00:00:00 +0200

I’d like to share a few tips I recently (re)discovered about Python’s enums. While interesting on its own, this article is also paving the way on a more advanced article I hope to write soon. Let’s dive right in!

`auto`

By using the function enum.auto …

Writing a browser extension

Julien Enselme — Sun, 16 Feb 2025 00:00:00 +0100

I recently wrote a browser extension for Firefox and Chromium based browsers for my Legadilo (RSS feeds aggregator and articles saver) project. The goal is to make it easier and faster to save an article or to subscribe to a feed directly on a web page without forcing you to …

Using podman for containers

Julien Enselme — Sun, 09 Feb 2025 00:00:00 +0100

Podman is an alternative to Docker and Docker compose. It uses the same CLI interface than Docker and uses the same standardized image format. So you can use an image built with Docker with it or build an image and then use it with Docker. Its podman-compose command is compatible …

Systemd Timers

Julien Enselme — Sat, 01 Feb 2025 00:00:00 +0100

After using anacron for years to run a backup script regularly, I decided to have a look at systemd timers. Overall, anacron worked fine: I could run tasks as my user and it would start tasks if they missed a run. But, I was still frustrated with how it worked …

My take on UV and Ruff

Julien Enselme — Sat, 25 Jan 2025 00:00:00 +0100

I recently tried the new and shiny tools made by astral. I only used them on my personal projects yet, but I’m still very impressed! You may already have heard of them. I’ll try to keep the article concise and won’t dig too deep into the tools …

Weird test behavior in my Django project test suite after an IntegrityError

Julien Enselme — Sun, 01 Dec 2024 00:00:00 +0100

Recently I encountered a very weird behavior in my Django project test suite. I created a view that caught an IntegrityError from the database (caused by duplicates in a unique index). When this error occurs, I want to respond with a 409 - CONFLICT status code and an error message.

TL …

Offline support almost without Javascript

Julien Enselme — Tue, 27 Feb 2024 00:00:00 +0100

Recently I wandered wether I could build a website with offline support without building a full SPA. The answer is yes it’s doable: you only need Javascript for the service worker. Just for the fun, I also tried it with navigation done with HTMX and without much surprise it …

Development containers

Julien Enselme — Tue, 02 Jan 2024 00:00:00 +0100

I recently discovered the dev containers standard (or development containers for long) recently after trying to contribute to a project which had them enabled by default. It seems to be a new standard way to work with containers in development.

The goal is to provide a container you can use …

Django async

Julien Enselme — Sun, 10 Dec 2023 00:00:00 +0100

Now that Django is fully async (views, middleware and ORM), I though it was a good time to test how it behaves when run asynchronously. I’ll try to keep this article concise with only relevant data and resources. Code can be seen in a sample project so you can …

Writing RSS reading app with various frontend frameworks

Julien Enselme — Sat, 09 Sep 2023 00:00:00 +0200

During the summer, I decided to test a few frontend framework to see what’s going on in this space and form a better opinions over alternatives to React. I tested Svelte because after hearing from it I felt attracted to it, Vue because it is popular, React to have …

My opinion after testing some AI code assistant

Julien Enselme — Mon, 21 Aug 2023 00:00:00 +0200

With all the hype around AI and since I had time to spare, I decided to test some AI coding assistants to make my own opinion about them. I'll start by giving my opinion on each assistant I tried. I will be a bit fuzzy since I didn't intend to …

My opinion on enums in TypeScript

Julien Enselme — Fri, 18 Aug 2023 00:00:00 +0200

Today I'd like to dig a bit on enums in TypeScript and their potential alternatives. For this, I'll be using the playground and TypeScript 5.1.6 (latest released version when I am writing this). I expect you to know what enums are and to be comfortable in TypeScript.

Let's …

Exploring a weird HTTP issues

Julien Enselme — Wed, 04 May 2022 00:00:00 +0200

Today I'd like to explain how I tried to solve a weird HTTP issues that I found at work. I hope you will find the method and the trials I used the useful/interesting if/when you will encounter something similar.

The issue was this: I needed to dynamically generate …