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

Clamp a Number to a Range

Implement a clamp function that returns a value within a specified range.

numbers conditionals comparisons

Python Basics easy

Min of three numbers

Write a function that returns the minimum of three integers.

min comparison function

Python Basics easy

Sign of a Number

Write a function that returns the sign of a number as a string.

conditionals numbers comparison

Python Basics easy

Boolean from comparison chain

Implement a function that evaluates a chain of comparisons and returns the boolean result.

comparison booleans evaluation

Python Basics easy

Max of a variable-length list

Implement a function that returns the maximum value from a list of numbers without using max().

conditionals loops comparison

Python Basics easy

Between inclusive

Write a function that returns True if a number is between two given bounds, inclusive of the bounds.

comparison conditionals boundaries

Python Basics easy

Max of three numbers

Implement a function that returns the maximum of three numbers using comparisons.

conditionals comparison numbers

Python Basics easy

Sign of a number

Write a function sign_of_number that returns -1 for negatives, 0 for zero, and 1 for positives.

conditionals numbers comparison

Python Basics easy

Find Minimum Value

Write a function that returns the minimum integer from a given list.

Strings & Text easy

Hamming Distance

Implement a function that computes the Hamming distance between two strings of equal length.

strings character-comparison distance

Dicts & Sets easy

Are two lists the same multiset

Write a function that checks if two lists contain the same elements with the same multiplicities, ignoring order.

multiset dictionary counting

OOP & Classes easy

Rectangle class

Implement a Rectangle class with properties, methods, and special methods for basic geometry and comparison.

classes magic-methods geometry

OOP & Classes medium

Comparable mixin

Create a Comparable mixin that auto-generates all rich comparison operators from a single __lt__ method.

oop mixin dunder-methods

Data Structures & Algorithms medium

Heap Sort Implementation

Implement the heap sort algorithm to sort a list of comparable elements in non-decreasing order.

heap sorting in-place

Data Structures & Algorithms easy

Shell Sort

Implement Shell sort, an in-place comparison sort that generalizes insertion sort, using a gap sequence that shrinks by half each pass.

sorting shell-sort in-place

Showing 15 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.