Simon Willison’s Weblog

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8th September 2025

Tool Pyodide Bar Chart Demo (pandas + matplotlib) — Execute Python code directly in your browser with Pyodide, a WebAssembly-based Python runtime. This demo loads pandas, numpy, and matplotlib in the client to generate a bar chart from sample data and display it as a rendered image—no server required. The first run may take a few seconds as the necessary libraries are downloaded from CDN, but subsequent executions run instantly from your browser's cache.

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This is a beat by Simon Willison, posted on 8th September 2025.

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