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467 challenges 330 easy 120 medium 17 hard

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Lists & Arrays easy

Running Maximum

Implement a function that returns a list where each element is the largest value seen so far.

lists cumulative maximum

Lists & Arrays easy

Average excluding min and max

Return the average of a list after discarding the lowest and highest elements, handling edge cases.

lists statistics sorting

Lists & Arrays easy

Find Second Largest

Find the second largest unique number in a list, or None if it doesn't exist.

sorting max unique

Showing 3 challenges · easy · Lists & Arrays

Lists & Arrays — Python coding challenges

What you will find here

This page lists lists & arrays challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.