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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

Iterators & Generators easy

Custom iterator class

Implement a custom iterator class that repeatedly yields elements from a list up to a given number of times.

iterator class cycle

Iterators & Generators easy

Flatten Nested List Iterator

Implement a class that iterates over all integers in a nested list structure in depth-first order.

iterator generator flatten

Iterators & Generators easy

Iterator protocol class

Implement a class that follows the iterator protocol and yields squared numbers up to a given limit.

iterator-protocol class lazy-evaluation

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.