Classes and Python's data model, built from the objects of mathematics: points, fractions, polynomials, vectors, matrices, integers mod n and quaternions. Every program runs in your browser.
Free to start · adaptive placement finds your level · reviews timed to your own forgetting.
Every idea is taught with motivation and a worked example before the drills, and an FSRS spaced-repetition engine schedules each review for the day its model predicts you would forget it. A short placement check finds what you already know, so you start Python in Depth exactly where it's useful.