Simon Willison’s Weblog

24th September 2025

Tool NumPy Vectors & Matrices — Pyodide Lab — Execute NumPy vector and matrix operations directly in your browser using an interactive lab powered by Pyodide. Work through five hands-on exercises covering elementwise operations, dot products, matrix multiplication, broadcasting, and indexing, then experiment freely in the playground sandbox with instant Python output.

Posted 24th September 2025 at 11:35 pm

Recent articles

Some thoughts on the Navier–Stokes Millennium Prize Problem - 8th September 2026
The Pelican comparison grid for Astra is pretty interesting - 4th September 2026
OpenAI's rogue agents were caught communicating via public wikis - 4th September 2026

This is a beat by Simon Willison, posted on 24th September 2025.

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