Recent Posts

Unit Testing in Python — Patching, Mocks and Dependency Injection Unit Testing in general is trivial with Python and pytest, but a lot of developers get frustrated when they have to patch dependencies away to make code testable. In this article, you will learn how to patch and create mocks. If you want to refresh basics about unit testing in … Read More »

Medium I recently started publishing articles on Medium, as you might have noticed. The reason for this is simple: I'm wondering how much money I can make with the kind of articles I like to write. On this blog, I receive something like 10 EUR per year via paypal.me. By … Read More »

Unit Testing in Python — The Basics Unit testing is the number one skill which separates people who just finished their degrees from people with practical experience. Especially for Python, that’s a shame as it is trivial to learn this skill. In this article, you will learn how to write and run unit tests in Python … Read More »

Type Annotations in Python 3.8 One reason why Python is so easy to get started with is that it has dynamic types. You don’t have to specify the type of a variable, you just use variables as labels for containers of data. But in bigger projects, having types is helpful. If you have an … Read More »

Working Hours How many working hours does a typical month have? I asked myself this question after seeing a trashy video in which a guy claimed a yearly salary of over 150k EUR for freelancing software engineers would be easily possible. I have the impression that freelancers / freelancer wannabes sometimes romanticize it … Read More »

Pythons super() function Python has a built-in function called super(). It might behave different from what you thought. Single Inheritance As a first simple example, consider this script: class A: def __init__(self): print("A") super().__init__() class B(A): def __init__(self): print("B") super().__init__() class C(B): def __init__(self … Read More »

In-Ear Headphones I use my in-ear headphones a lot: I work from home and have a couple of video conferences. I go running and listen to podcasts. I go cycling and talk with my father. And my in-ear headphones break often. This article is only about in-ear headphones with a microphone and … Read More »

Sorting Big Data Big Data was a common buzzword in industry in 2012 until 2017. It is still common, but hopefully less of a buzzword. Now other buzzwords are more common: trends.embed.renderExploreWidget("TIMESERIES", {"comparisonItem":[{"keyword":"/m/0bs2j8q","geo":"","time":"2008-01-01 2020-03-24"},{"keyword":"/m/01hyh_","geo":"","time":"2008-01-01 2020-03-24"},{"keyword":"/m/0138n0j1 … Read More »

Python EEL Eel is a little Python library for making simple Electron-like offline HTML/JS GUI apps, with full access to Python capabilities and libraries. Hello World As a hello world example, I decided to create an offline version of write-math.com. Write-math in eel is on GitHub. The directory structure of … Read More »

Python is interpreted Python is interpreted. Python is a scripting language. I hear those two statements pretty often when people want to say that Python is slow or that Python is not suited for large systems. In this article I want to dispel those myths. Interpreted Language What does it mean to say … Read More »