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Practice Arena

Python Coding
Challenges

Write real Python in the browser. Instant feedback. From beginner to expert.

56 challenges 25 easy 23 medium 8 hard

All Easy Medium Hard

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All Python Basics Strings & Text Lists & Arrays Dicts & Sets Functions & Closures OOP & Classes Data Structures & Algorithms Advanced Python

Functions & Closures medium

Memoize decorator

Implement a @memoize decorator that caches results of a function.

decorators closures caching

Data Structures & Algorithms hard

LRU cache decorator

Implement @lru_cache(maxsize=N) for unary functions using OrderedDict.

decorators caching OrderedDict

Advanced Python medium

Retry decorator

Implement @retry(times=3) that retries a function on exception.

decorators error-handling

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