Re: [core-updates-frozen] Different variants of Python packages in the same profile?

[Lars-Dominik Braun]

Hello Ricardo,

> So… since numpy 1.20 is the exception here, could we perhaps … 
> rename it?  And then have python-numba import that renamed module 
> “totally-not-numpy” instead of “numpy”?  Could we thus avoid this 
> conflict?  If renaming is an option — how would it be done?  Is it 
> enough to rename the “numpy” directory with “numpy-1.20”, the 
> “numpy.py” file with “numpy-1.20.py”, and then update all “import” 
> statements both by numpy itself and by python-numba?
I feel this is a dangerous idea. Python is dynamically typed and if we
– somehow – end up with objects from both, numpy 1.20 and numpy 1.21
in the same program, which can still happen when renaming, things may
go wrong very badly. [1] says versions 1.* are ABI compatible, but the
API changes between releases, which is probably why numba cannot be used
with a newer numpy.

Can we rewrite the entire graph to use numpy 1.20 whenever a package
imports numba?

Cheers,
Lars

[1] https://numpy.org/devdocs/user/depending_on_numpy.html