Learning how to define a function in Python is one of the most important steps to mastering the language. Functions are blocks of code that perform a specific task and can be “called” from any point ...

In the last post introducing Python, I demonstrated how to make a simple app using variables and conditional statements. In order to do anything really powerful in a given programming language though, ...

Python is best thought of as a dynamic but strongly typed language. Types aren’t associated with the names of things, but with the things themselves. This makes Python flexible and convenient for ...

Interested in learning Python but don't know where to start? I'll walk you through the basics of the ever-popular programming language step-by-step. In an hour or so, you'll go from zero to writing ...

Learn how Mypy's type checking works with functions and generators. In my last two articles I've described some of the ways Mypy, a type checker for Python, can help identify potential problems with ...

If you’re an AP Computer Science student using CodeHS, you’re about to get a significant upgrade: the platform is refreshing its Python curriculum for Fall 2026 with improved autograders, clearer ...