What's new

The Learn menu has a Tools list, and every page ends with links to all the tools and guides.

Code boxes and the editor's Share menu open your code in the visualizer, and a CSV file in the editor opens in the CSV explorer.

Pydantic, statsmodels, SymPy, NetworkX, sqlite3 and the rest of the runtime's packages load the first time you import them.

Examples that use input() wait for your answer under the code, in tutorials, exercises and program pages.

The async/await and concurrency tutorials run real asyncio, and the Pydantic tutorial ends with the library itself.

Write a pygame game and play it in your browser, with on-screen keys on phones.

Run code one line at a time and watch its variables, lists and objects change.

Sorting, searching, recursion and graph algorithms, step by step.

What 40 common error messages mean and how to fix them. The editor links to them when your code fails.

250 programs with their output and an explanation, plus the CBSE class 11 and 12 practical lists.

Tutorial exercises on their own pages, each with a Check button. New ones go up every two weeks.

60 common questions with short answers and code you can run.

Test regular expressions with Python's own re module.

See a CSV file's columns, types and missing values, with a chart for any column.

Make a matplotlib chart from your numbers and copy the code.

Read any .ipynb file or GitHub notebook, then run it in the editor.

Turtle graphics in the browser, with PNG and GIF export, in six languages.

Python's >>> prompt under the editor, with the variables from your last run.

Tutorial examples show their output before you press Run.

Class lists, every tutorial exercise assignable, CBSE, GCSE and AP CSP sets, and posting assignments to Google Classroom.

One script tag makes every Python code block on your site runnable.

Join a class with your school email, and count for your school.

Send a message, your code or a screenshot. A person reads every one.

Create a class, assign problems and quizzes, and see who is stuck on a live board. Contests and duels too.

Five "what does this print?" snippets a day, from easy to hard.

From FizzBuzz to an LRU cache, each checked when you press Check.

Press Ctrl+K anywhere to find a tutorial, problem or page.

A Run button on Python code in ChatGPT, Claude, Stack Overflow and GitHub.