Pyodide 314.0: Python packages can now publish WebAssembly wheels to PyPI

(blog.pyodide.org)

46 points | by agriyakhetarpal 4 days ago

6 comments

simonw 1 hour ago
I've been looking forward to this for ages!
This means we can now take any C/Rust/whatever extension for Python, compile that as a `.wasm` extension, and then load it directly in browser Pyodide projects using:
```
  await micropip.install("package-on-pypi")
  import package_name
```
Here's how to try the new feature out. Visit https://pyodide.org/en/stable/console.html and type:
```
  import micropip
  await micropip.install("pydantic_core")
  import pydantic_core
```
That gets you this WASM wheel: https://pypi.org/project/pydantic_core/#pydantic_core-2.47.0...
You can tell that it's got compiled code in (and not just Python) by running:
```
  pydantic_core._pydantic_core
```
I get this:
```
  <module 'pydantic_core._pydantic_core' from '/lib/python3.14/site-packages/pydantic_core/_pydantic_core.cpython-314-wasm32-emscripten.so'>
```
[-]
- simonw 6 minutes ago
  I had an older experimental Pyodide WASM project lying around (a packaging of the Luau language by Roblox) so I had Codex package that up for me and pushed it to PyPI.
  Here's the package: https://pypi.org/project/luau-wasm/
  And an interactive demo page where you can try it out: https://simonw.github.io/luau-wasm/
12_throw_away 1 hour ago
Executing normal python programs inside a cpython vm inside a wasm context inside a javascript process inside a sandbox inside a browser is - genuinely - extremely exciting! (Might as well run the browser inside a container inside a VM while you're at it though.)
wolfgangK 1 hour ago
I presume this works (will work) also for JupyterLite that is based on Pyodide ? Would be great if it helped getting the latest OpenCV-python version [0] and it's dnn goodies being available on a zero-install client side Notebook !
[0] https://news.ycombinator.com/item?id=48421858
[-]
- simonw 1 hour ago
  Yeah it should definitely work there, anything you can `micropip.install()` into a Pyodide environment will work with JupyterLite.
fzumstein 52 minutes ago
Pyodide 314.0 is already available in xlwings Lite (the Python in Excel alternative you actually wanted).
runningmike 1 hour ago
Great news. And indeed a nice step to an even broader Python ecosystem.
sgammon 51 minutes ago
nice to see JS/python interop becoming a thing