Title case converter
Return the string with each word capitalised.
Longest word in a sentence
Write a function that returns the longest word from a sentence, with first-occurrence tie-breaking.
Initials from a Full Name
Return the uppercase initials of each word in a given full name.
Count words in a sentence
Implement a function to count words in a sentence, ignoring extra whitespace and handling empty strings.
Reverse Words in a Sentence
Reverse the order of words in a sentence while preserving single spaces between words.
Abbreviate Name
Create a function that takes a full name and returns an abbreviated version with initials and the last name.
Parse Log Line
Write a function that parses a log line and returns a dictionary with timestamp, level, and message.
Split on camelCase
Given a camelCase string, split it into words at uppercase letters and return them as lowercase words.
Normalize Whitespace
Write a function that normalizes any whitespace in a string to single spaces and trims the ends.
Parse URL components
Write parse_url that splits a URL into its standard components with defaults for missing parts.
Parse numbered list
Take a string containing a numbered list and return a clean list of the item texts.
Compare Version Strings
Given two version strings, compare them numerically by splitting on dots and ignoring leading zeros.
Parse path segments
Implement a function that parses a path string into clean segments, ignoring slashes, empty parts, and dot segments.
Parse coordinate pairs
Parse a string of coordinate pairs into a list of coordinate lists.
Chunk list into groups
Implement a function that splits a list into sublists of a given size.
Memory view slice
Implement chunk_list that splits a list into consecutive sublists of a given chunk size.
Split Array Largest Sum
Minimize the largest sum among k contiguous subarrays using dynamic programming.
Binary Search on Answer: Find the Minimal Maximum Subarray Sum
Implement a function that finds the minimal possible maximum subarray sum when splitting an array into at most k contiguous subarrays.
Minimum Limit of Balls in a Bag
Given an array of bag sizes and a number of allowed splits, find the minimum possible maximum bag size.
Split list at index
Return prefix and suffix tuples at index k.
Showing 1–20 of 20 challenges
Guide: free Python coding challenges
Practice Python by solving problems
PythonSkillset challenges are hands-on coding exercises from beginner to advanced. Open a challenge, read the problem, write Python in the split-pane editor, and run tests with Pyodide — no install required.
How to use the arena
- Pick a category — basics, algorithms, strings, and more
- Open a challenge, read the statement, and edit the starter code
- Run tests, fix failures, then try a related quiz or tutorial lesson
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.