Practice Arena

Python Coding
Challenges

Write real Python in the browser. Instant feedback. From beginner to expert.

467 challenges 330 easy 120 medium 17 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

Generator Pipeline

Implement a generator function that yields only even numbers from an input list, squared.

generators lazy-evaluation filter

Iterators & Generators easy

Range-like generator

Implement a custom generator that yields numbers like Python's range but with flexible bounds.

generator yield range

Iterators & Generators easy

Fibonacci Generator

Create a generator function that yields Fibonacci numbers from 0 upward until a given limit.

generator fibonacci lazy evaluation

Iterators & Generators easy

File Line Reader Generator

Implement a generator function that reads a file-like object and yields each non-empty line without loading the whole file into memory.

generators file-io lazy-evaluation

Showing 4 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.