Jupyter eco-system compatibility whish for "pypy3.7-v7.3.5-win64"

[stonebig]

Pywin32 doesn't compile on PyPy3 for Windows, as too big/tricky/whatever.

Would it be possible to replace pywin32 for the few functions you call using only ctypes ?

https://github.com/jupyter/jupyter_core/blob/master/jupyter_core/paths.py#L387.L403

Apparently, it seems the only [known] blocker to get a jupyter notebook working on "pypy3.7-v7.3.5-win64", from Jupyter side

[stonebig]

If Anaconda is considering a PyPy3 64 bit on Windows, won't they have the problem too ?

[minrk]

closed by #230