Practice Arena

Python Coding
Challenges

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467 challenges 330 easy 120 medium 17 hard

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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 easy

Minutes to Hours: Time Conversion Helper

Write a function that converts minutes into a human-readable 'Xh Ym' string, with special cases for zero and whole hours.

arithmetic formatting conditionals

Python Basics easy

Fahrenheit to Celsius

Implement a function that converts degrees Fahrenheit to degrees Celsius.

temperature arithmetic conversion

Python Basics easy

Speed Converter

Write a function to convert speeds between kilometers per hour and meters per second.

arithmetic conversion function

Python Basics easy

Digit Count

Count the number of digits in an integer using arithmetic, without string conversion.

numbers loops math

Strings & Text medium

Zigzag string conversion

Encode a string in zigzag order across numRows rows, then read row by row.

Strings & Text easy

Snake case to camel case

Implement a function that converts snake_case strings to camelCase.

strings case-conversion text-processing

Strings & Text easy

Camel case to snake case

Write a function that converts camelCase input to snake_case while handling acronyms and numbers correctly.

strings case-conversion parsing

Strings & Text easy

Kebab Case a Phrase

Implement a function that converts a phrase into lowercase kebab-case, handling spaces, punctuation, and camelCase.

strings case-conversion regex

Strings & Text easy

Kebab Case Converter

Implement a function that converts any string to kebab-case, handling spaces, underscores, camelCase, and punctuation.

strings case-conversion parsing

Showing 9 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.