WebAssembly version of Python

Right now this is just some bash script to create a WebAssembly build of Python via emscripten that can be used via Node.js to run a line of code from the command line.

Motivation:

• Pyodide doesn't support using their build from node.js.
• This package is part of a bigger project to bring the capabilities of mathematical software to the Javascript ecosystem (browser, nodejs/deno servers, edge computing like cloudflare), and use the Javascript runtime as a common place to tie them all together. Thus our needs are different from Pyodide.

Quickstart

This is a work in progress and the module has no public export yet. You can still try it out as follows:

$ npm install @sagemath/python
$ cd node_modules/@sagemath/python/dist
$ node ./python.js -c 'print("hello world", 2+3)'
...
hello world 5

Build from source

This will download and build Python from source, and copy the resulting WebAssembly build into dist/ , assuming you have installed the emscripten toolchain.

$ ./build.sh

Todo

The first goal is the Python test suite, which currently doesn't even start:

$ node ./python.js -m test

Acknowledgement and Related/Inspirational Projects

• This is inspired by the Python build part of Pyodide. In particular, all our patches to Python in the patches subdir come from there.
• The python-emscripten project looks potentially relevant and useful.