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I may have finally found the Python-in-a-sandbox solution I've been looking for... here's my latest experiment, this time running MicroPython in WebAssembly inside my Python applications simonwillison.net/2026/Jun/6/m...

simonwillison.netRunning Python code in a sandbox with MicroPython and WASMI’ve been experimenting with different approaches to running code in a sandbox for several years now, but my latest attempt feels like it might finally have all of the characteristics …

Elena

@eleh7.bsky.social

8 June

This is the sandboxing approach I've been eyeing for data pipeline work — isolating untrusted transforms without spinning up full containers. The WASM angle is clever. Does it handle numpy/pandas or just pure Python?

Simon Willison

@simonwillison.net

It doesn't handle any Python package that can't be inlined into a single pure Python string For numpy something based on Pyodide would be a more likely route

8/6/26, 11:27 pm0 reposts2 likes

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