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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

GCD via Euclid

Compute the greatest common divisor of two positive integers.

Python Basics easy

Absolute Difference of Two Integers

Compute the absolute difference between two integers, regardless of order.

absolute difference math

Python Basics easy

Grade from Score

Write a function that maps a numeric score to its letter grade using standard grading thresholds.

conditionals functions integers

Python Basics easy

Min of three numbers

Write a function that returns the minimum of three integers.

min comparison function

Python Basics easy

Integer division and remainder

Write a function that performs integer division and returns both quotient and remainder.

operators division remainder

Python Basics easy

Sum numbers from 1 to n

Implement a function that computes the sum of all integers from 1 to n.

sum loop arithmetic

Python Basics easy

Seconds to Hours Minutes Seconds

Convert total seconds into a zero-padded HH:MM:SS format.

arithmetic divmod formatting

Python Basics easy

Digit count of an integer

Given an integer, return the number of digits it has, handling negatives and zero correctly.

integers loops arithmetic

Python Basics easy

Count Multiples in a Range

Given a start, end, and divisor, count how many integers in [start, end] are divisible by the divisor.

multiples range divisibility

Python Basics easy

Sum from 1 to n

Write a function that returns the sum of all integers from 1 to n (inclusive).

math arithmetic sum

Python Basics easy

Count Positives

Count the positive numbers in a list of integers.

conditionals loops basic

Python Basics easy

Round to nearest ten

Write a function that rounds any integer to the nearest multiple of ten.

arithmetic rounding integers

Python Basics easy

Modulo Remainder

Implement a function that returns the remainder of a divided by b without using the modulo operator.

modulo arithmetic integers

Python Basics easy

Last Digit Extractor

Write a function that returns the last digit of a non-negative integer using the modulo operator.

integers modulo arithmetic

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

Map, Filter, Reduce

Implement three functions using map, filter, and reduce to manipulate a list of integers.

map filter reduce

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

Showing 18 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.