A decorator that takes arguments in Python
Python interview exercise on Functions & Decorators, difficulty 3 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 retry(attempts), used as @retry(3). The decorated function is called until it returns without raising or it has been tried attempts times; the last exception is then re-raised. A decorator with arguments is a function that returns a decorator: three levels of def.
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.