Sandbox
A blank playground. Write anything, hit Run. Every line has a comment (starting with #) explaining what it does — read them first, then change things.
main.py
…First load pulls ~10 MB of Python. Only happens once — the browser caches it after.
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How this works
The starter shows two of Python's most useful tools: **variables** (a name that stores a value) and **f-strings** (text with {variable} slots that get filled in). Plus a **for loop** that repeats the same line three times.