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Python Coding
Challenges

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925 challenges 556 easy 323 medium 46 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

Hexagonal Number

Write a function to check if a positive integer is a hexagonal number.

math loops conditionals

Python Basics easy

Count trailing zeros

Write a function that counts the number of trailing zeros in the decimal representation of a positive integer.

loops integers basics

Python Basics easy

Count Leading Zeros

Write a function that returns the number of leading zeros in a list of integers.

lists iteration counting

Python Basics easy

Guess Number Game

Simulate a number guessing game with attempts, feedback, and a win/lose result.

loops conditionals functions

Python Basics easy

Parse environment variables

Write parse_env_vars that parses KEY=VALUE lines into a dict, converting booleans/numbers and ignoring comments.

strings parsing dictionaries

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

Broadcast Add Scalar

Add a scalar to every number in a 2D list and return a new 2D list without modifying the original.

nested-loops addition lists

Python Basics easy

Cumulative Sum Vectorized

Implement a function that returns the cumulative sum of a list of numbers.

lists cumulative sum

Python Basics easy

Percentile Calculation

Given a list of numbers and a target value, return the percentile rank of that value in the list.

lists statistics math

Showing 25–33 of 33 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.