Hi folks, I'm having a problem with an exported virtual env and I was wondering if anyone had seen anything like this before. I have a requirements file that contains:

vtk==9.3.0

I then run

pants export --resolve=python-default

In the exported venv

import vtk

fails with

ImportError: Initialization failed for vtkWebCore, not compatible with vtkmodules.vtkCommonCore

But if I

pip uninstall vtk

then

pip install vtk==9.3.0

then

import vtk

works fine. So it seems that pants isn't installing vtk into the exported venv correctly. Is there anything I could try to debug this further? Thanks!

It works for me on a new repo with Pants 2.19.0 and got for

[python].interpreter_constraints = ["==3.9.*"]

. Maybe try playing with those? If you're using lockfiles, you can double-check that the requirements and platform information looks right. You might also want to double-check that no other requirements have an extra, like

vtk[web]

Thanks a lot Daniel! I'll update Pants, try to reproduce that and see what's different