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 easy

Find Missing Number

Given a list of n distinct integers from 0..n with one missing, return the missing number.

math integers arrays

Python Basics easy

Convolve 1D signal

Implement a 1D convolution function with three modes using pure Python.

convolution arrays loops

Python Basics easy

Remove Duplicates from Sorted Array

Given a sorted list, remove duplicates in-place and return the new length.

lists in-place two-pointers

Python Basics easy

Array mean and std

Implement the function array_stats that returns the mean and population standard deviation of a list of numbers.

statistics mean std

Python Basics easy

Reshape array dimensions

Implement a function that reshapes a 1D list into a 2D list with given dimensions.

reshape matrix lists

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

Showing 1–6 of 6 challenges · Python Basics

Python Basics — Python coding challenges

What you will find here

This page lists python basics challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

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.