You can do every lesson in this course without installing anything — the Run boxes work in your browser. So don't let setup slow you down.

When you're ready to write Python on your own computer (outside this course), you'll install it once. The next three lessons cover Windows, macOS, and Linux — read the one that matches your machine and skip the others.

A quick way to check if Python is already installed, in your computer's terminal:

python --version

If it prints something like Python 3.12.x, you're set. If not, follow your platform's lesson.