A container class in Python
Python interview exercise on Classes & Dataclasses, difficulty 2 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Write Stack with push(item), pop() and peek(), both raising IndexError("pop from empty stack") or ("peek at empty stack") when empty, len() support, and iteration from the top down.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.