Practice Arena

Python Coding Challenges

Write real Python in the browser. Instant feedback. From beginner to expert.

925 challenges 556 easy 323 medium 46 hard
All Easy Medium Hard
All Python Basics Strings & Text Lists & Arrays Dicts & Sets Functions & Closures OOP & Classes Data Structures & Algorithms Advanced Python Iterators & Generators Decorators & Context Managers Error Handling & Exceptions Regular Expressions Math & Number Theory Bit Manipulation Dynamic Programming Trees & Binary Trees Graphs & Graph Algorithms Recursion & Backtracking Greedy Algorithms Binary Search Two Pointers & Sliding Window Stacks & Queues Heaps & Priority Queues Linked Lists Matrix & 2D Arrays Datetime & Time Calculations Data Formats & Parsing SQL & SQLite Numpy & Vectorized Computing Cryptography & Hashing
Python Basics medium

Jump Game Minimum Jumps

Given an array of non-negative integers where each element is the maximum jump length, compute the minimum jumps to reach the last index.

arrays greedy minimum-jumps
+20 pts 25m
Lists & Arrays medium

Partition around a pivot value

Implement an in-place partition of a list around a given pivot value, returning the boundary index.

lists partition two-pointer
+20 pts 20m
Data Structures & Algorithms medium

Find Peak Element

Implement a function that returns the index of any peak element in an integer array.

arrays search binary-search
+20 pts 25m
Recursion & Backtracking medium

Beautiful Arrangement Count

Count the number of permutations of 1..n such that for every index i, either i is divisible by the number at that position or the number is divisible by i.

recursion backtracking permutations
+30 pts 30m
Greedy Algorithms medium

Gas Station Circuit

Given gas and cost arrays for a circular route, determine the starting gas station index that allows a full loop, or -1 if none exists.

greedy arrays circular
+25 pts 20m
Greedy Algorithms medium

Jump Game Reachable

Given an array of non-negative integers where each element is the maximum jump length, determine if you can reach the last index.

greedy arrays jump-game
+20 pts 20m
Linked Lists medium

Split list at index

Return prefix and suffix tuples at index k.

linked-list lists pointers
+22 pts 20m
SQL & SQLite medium

Index Creation Query

Create an in-memory SQLite database, execute CREATE INDEX statements, and return the resulting index metadata rows.

sqlite create-index schema
+20 pts 20m

Showing 1–8 of 8 challenges · medium

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

  1. Pick a category — basics, algorithms, strings, and more
  2. Open a challenge, read the statement, and edit the starter code
  3. 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.