Pathlib Operations: File Path Basics
Practice using pathlib to manipulate file paths and extract components.
Stack Trace Sanitizer
Implement a function that rewrites traceback file paths to basenames only.
Extract file extensions
Implement a function that extracts the extension from a filename according to standard rules.
Parse path segments
Implement a function that parses a path string into clean segments, ignoring slashes, empty parts, and dot segments.
Nested get with dotted path
Implement a function that safely retrieves a value from a deeply nested dictionary using a dot-separated path, returning a default if any key is missing.
Union Find Class
Implement a UnionFind class with find and union operations supporting path compression and union by size.
Unique Paths in a Grid
Count the number of unique paths from the top-left corner to the bottom-right corner of a grid, moving only right and down.
Triangle Minimum Path
Compute the minimum path sum from top to bottom of a triangle given as a list of lists.
Showing 1–8 of 8 challenges · easy
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.