Live Programming Mode - Python Tutor - Visualize Python and JavaScript code

This is the live programming mode of Python Tutor, which continually runs and visualizes your code as you type. It is highly experimental and does not yet support all of the languages and features of the regular Python Tutor visualizer.

Help us improve this live programming mode by filling out this two-question survey.

Write code in (drag lower right corner to resize code editor)

Support our research and keep this tool free by filling out this user survey.
If you are at least 60 years old, please also fill out our survey about learning programming.

Visualizer options:

Click the button above to create a permanent link to your visualization. To report a bug, paste the link along with a brief error description in an email addressed to philip@pgbovine.net

This live programming mode of Python Tutor (code on GitHub) supports three languages: Python 2.7 and 3.3 with limited module imports and no file I/O, and JavaScript running in Node.js v6.0.0 with limited support for ES6. Try the regular Python Tutor visualizer for additional language support.

Privacy Policy: By using Online Python Tutor, your visualized code, options, user interactions, text chats, and IP address are logged on our server and may be analyzed for research purposes. Nearly all Web services collect this basic information from users. However, the Online Python Tutor website (pythontutor.com) does not collect any personal information or session state from users, nor does it issue any cookies.