In this article, you’ll study a beautiful Python puzzle which was created by my friend and co-author Lukas. When I saw this puzzle the first time, I was very lazy about it. I looked at the puzzle and immediately threw my answer into Lukas’ face. It was so obvious… But Lukas kept smiling and I … Read more

To prevent data loss, do you want to create the following warning popup (alert) before a user of your web page attempts to close, reload, or leave the page via the “back” button? You can do this in a simple step: just copy and paste the following JavaScript code snippet between the <head> … </head> … Read more

I recently finished the educational Python web app Pythonchecker.com for Python code analysis: Before starting the app, I wondered: what’s the fastest way to set up a Python-based web application? My previous Django-based application was self-hosted on a bare metal machine. This was highly complex, error-prone, and tedious. I had to learn Apache web server … Read more

Does your code always follow the PEP standard?Have you ever been criticized for not writing “Pythonic code”? I know I have — especially when I was just starting out with Python a few years ago. This can be frustrating because criticism is not always constructive. Destructive criticism kills any motivation there is left for you … Read more

Yeah, Python is slower than other programming languages and has a larger memory footprint than C/C++. Read this article if you want to learn about Python’s “dark sides”. However, Python allows for rapid prototyping, makes programming so much easier for beginners and is one of the most effective ways of writing clean and meaningful code. … Read more

“Why is the Maximum here 10? Why is float lower than int in identical values? Is there a rule? Thanx!” — Albrecht This excellent question points out the main challenge of this puzzle. Consider the content of the above list [3+2, 5*2, 30/3]: You can see that the list contains two values that are expected … Read more

One of my Finxter Python students, Davis, struggles with the following problem: “I want to get way better at reading, understanding and editing code. Eventually, i want to move to data science and machine learning. I think you are doing enough I just need more focus and determination. I really want to be a Python … Read more

In Python, the Boolean and operator takes precedence before the Boolean or operator. How does this work exactly? Consider the following example code puzzle: Before you read on, take a guess: What’s the output of this code puzzle? (You can solve the puzzle interactively at the Finxter app.) The puzzle tests your understanding of the … Read more