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Trace Table Visualiser
Step through Python code one line at a time and watch variable values change — built for teaching exam-style trace tables.
How to use it
- Pick an example or write your own code, then press Run.
- Use ◄ ► or the arrow keys to step through line by line.
- Space pauses and resumes automatic playback.
- Turn Compact off to see a row for every step, or on for the exam-style merged layout.
- Export CSV downloads the completed table.
Try Python Coach — structured lessons →