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This is a more advanced form of something I wrote for a company, just before the LLM boom. I've been waiting for someone in the sandbox wars to dev it.

I have an incomplete project similar to this but using CPython in a Rust WASI component I've been meaning to work on. I would also love to have an easily usable Python sandbox built on WASI, I'll have to give this a try!

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

I just use Jupyter notebooks.

Monty doesn't fit the bill? Too restrictive ?

Very cool, I'll keep an eye on it! I've tried the other option and built a small sandboxed JS runtime on top of Boa for my own needs: github.com/CharlyCst/sp...

I’ll always miss safe tcl subinterpreters. They can only use a safe subset of TCL commands and then you can expose more if you choose to.

micropython in wasm inside python apps, real nesting genre i didnt know i needed

This would solve so many problems we have. Namely that people absolutely refuse to use anything but python, so they can't build plugins.

Sounds like overkill. Love it!