Fibonacci(n)
Return the nth Fibonacci number efficiently.
Longest Substring with K Repeating Characters
Return the length of the longest substring of a given string in which every character appears at least K times.
Showing 1–2 of 2 challenges · medium · Python Basics
Python Basics — Python coding challenges
What you will find here
This page lists python basics 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.