List packages that are unavailable in jupyterlite environment

[paddymul]

Problem

I am tyring to make my package compatible with jupyterlite. There are core python packages that my package raw imports that aren't available in jupyter lite. I realize this is a probably a kernel specific problem.

So far I have run into errors importing psutil and packaging. I can fix this by wrapping the imports in try/except, but having to build a new version of my library each time is cumbersome.

Proposed Solution

At a minimum a list of all python core modules that aren't available in jupyterlite would be helpful. Maybe a line in developer docs with a `find -type f ./module_py_root | grep py$ | xargs grep -E '(psutil|packaging)' | grep import" to show library maintainers all relevant lines to look at.

I don't know if there is a way to add this as a ruff check.

Additional context

[jtpio]

Thanks @paddymul for opening the issue :+1:

Yes that would be useful.

Linking to https://github.com/jupyterlite/jupyterlite/issues/967 for reference, as this was also discussed there.