Ten Million Users and Ten Years Later: Python Tutor's Design Guidelines for Building Scalable ...
summary
Python Tutor is a web-based code visualizer that grows over 12 years to over ten million users in 180+ countries, contributes to 55 papers across 35 groups in 13 countries, and stays live and useful. Design choices are concrete: a zero-install web app with no accounts, easy embeddable sharing to avoid hosting user content, a stateless architecture that favors old stable toolkits and minimal dependencies, and a workflow of single-developer maintenance plus filtering most user requests to remain sustainable.
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