Write a memoize decorator in Python
Python interview exercise on Functions & Decorators, difficulty 3 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
Write memoize(fn), a decorator that caches results by positional arguments so fn runs once per distinct argument tuple. Keep the wrapped function's name with functools.wraps. The standard library has this as functools.cache; write it yourself here.
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