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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

Lists & Arrays easy

Rolling Window Mean

Given a list of numbers and a window size k, return a list of the means of every contiguous subarray of length k.

sliding-window lists averaging

Lists & Arrays easy

Linear Interpolation Array

Given an array with some None values, replace them by linear interpolation between the nearest known values.

arrays interpolation math

Lists & Arrays medium

Convolve 1D Signal

Write a function that computes the 1D convolution of two lists in 'full' mode.

convolution arrays sliding-window

Lists & Arrays easy

Pad array edges

Implement a function that pads a list on both ends with a given value to a specified total length.

lists padding slicing

Showing 25–28 of 28 challenges · Lists & Arrays

Lists & Arrays — Python coding challenges

What you will find here

This page lists lists & arrays 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.