Lists & Arrays
medium
Flatten nested list
Yield every integer from an arbitrarily nested list, depth-first.
recursion
generators
Lists & Arrays
easy
Generate a Multiplication Table
Build a function that returns an n x n multiplication table as a list of lists.
nested-loops
list-comprehension
matrix
Showing 2 challenges · 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.