xeus-python in JupyterLite: How to install a package which is not available in conda but in pip, at run time?

[MRYingLEE]

An example of PyMuPDF is as follows:
%pip install PyMuPDF
generated output

`
Process pip requirements ...

Cannot install PyMuPDF from PyPi. Please make sure to install it from conda-forge or emscripten-forge! e.g. "%conda install PyMuPDF"
`.

%conda install PyMuPDF
generated output
`
Specs: ipywidgets, xeus-python, pandas, PyMuPDF
Channels: https://repo.prefix.dev/emscripten-forge-dev, https://repo.prefix.dev/conda-forge

Solving environment...
Cannot solve the request because of: No candidates were found for pymupdf *.
`.

There are few documents on installing packages.
Please clarify.

Thanks.

[martinRenou]

Thanks for opening an issue.

It looks like pymupdf is not a pure Python package, so you can't install it with pip from PyPi. It needs to be compiled for WASM usage and published on emscripten-forge.

See https://emscripten-forge.org/development/adding_packages.