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

Iterators & Generators easy

Yield from delegation

Implement a generator that flattens nested iterables of any depth using `yield from`.

generators yield delegation

Iterators & Generators medium

Cartesian Product Generator

Implement a generator function that yields the Cartesian product of multiple input iterables without precomputing all results.

generators cartesian product

Iterators & Generators easy

Zip Longest Fill

Create an iterator that yields lists from multiple iterables, padding with a fill value when lengths differ.

generators zip iteration

Showing 1–3 of 3 challenges · Iterators & Generators

Iterators & Generators — Python coding challenges

What you will find here

This page lists iterators & generators 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.