This Python peculiarity can lead to some unexpected behavior of your programs. — Say, you want a function that appends some data to a list. And if the list is not passed, then appends the same data to a newly created list. What would be the obvious and naive way to go? Sure, why not use default arguments here? …

Passing a QR code as an SVG code This tiny project will generate a QR code for any text and pass it to the HTML template as an SVG code. SVG is a very convenient medium for URLs or other text. This small demo demonstrates a few things: How to…

How much faster is your app with indexes? — Even “Senior” developers often forget to use indexes in Django. You can’t imagine how faster it can get if you simply add two lines of code into your model! In this article we will take measurements together: with and without indexes. Setup Our patient will be a small Django application with…

Step by step guide to writing Tetris in Python with PyGame In this tutorial, we will write a simple Tetris using the PyGame library in Python. The algorithms inside are pretty simple but can be a little challenging for the beginners. We will not concentrate on PyGame mechanics too much…

When Being Too Smart Makes Your Code Dumb Intro I often meet developers who are obsessed with code optimization. Don’t get me wrong, optimizing code is a noble endeavor — when done right, it can lead to programs that run faster, use fewer resources, and provide a better overall user experience…

Working in Django shell in PROD Situation You are working on a Django project in production, and you need to change a bunch of data in the database. You have two options: the right way — write a code locally, test it locally, then deploy and run, OR use python manage.py…

How to integrate a Telegram bot inside your Django App The problem We want to create a Telegram bot that will be able to access the database. If you simply write a function for the bot inside your Django app, how would you run it? …

It helps generate questions for quizzes Introduction In our company, we have a product called Delicatest that allows teachers to create quizzes for their students. In general, it is convenient to create quizzes in our system, but the problem is that creating quizzes is a very time-consuming task. Especially creating wrong variants of answers. We wanted to…

Unlocking the Full Power of Data Visualization with Matplotlib’s Hidden Features Introduction Matplotlib is a powerful and versatile plotting library in Python, widely used by data scientists, engineers, and researchers for visualizing data. While it offers a wide range of functions for plotting, some of its capabilities remain lesser known or…