from skmatter.sample_selection import DirectionalConvexHull is failing

[DavideTisi]

I had a notebook in the atomistic-cookbook that does from skmatter.sample_selection import DirectionalConvexHull

And this command is failing with the error:

Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    from skmatter.sample_selection import DirectionalConvexHull
  File "/home/tisi/miniconda3/envs/prova-skmatter/lib/python3.13/site-packages/skmatter/sample_selection/__init__.py", line 6, in <module>
    from ._base import (
    ...<5 lines>...
    )
  File "/home/tisi/miniconda3/envs/prova-skmatter/lib/python3.13/site-packages/skmatter/sample_selection/_base.py", line 9, in <module>
    from scipy.interpolate.interpnd import _ndim_coords_from_arrays
ImportError: cannot import name '_ndim_coords_from_arrays' from 'scipy.interpolate.interpnd' (/home/tisi/miniconda3/envs/prova-skmatter/lib/python3.13/site-packages/scipy/interpolate/interpnd.py)

I also tested creating a new environment pip installing skmatter and running from skmatter.sample_selection import DirectionalConvexHull on a python terminal and I get the same error.

• I tested with python 3.13 (and 3.11)
• scipy 1.15.1 ( which is automatically downloaded by pip when installing skmatter)
• numpy 2.2.2 (again automatically downloaded by pip when installing skmatter)

[Luthaf]

The _ndim_coords_from_arrays function is private, so this is likely a change from one version of scipy to another.

[DavideTisi]

yes, in the atomistic cookbook, I "fixed" the problem when I pinned a older version of scipy

[PicoCentauri]

Let me see if I am able to fix this :-).

[PicoCentauri]

It was just moved. See scipy/scipy#21754 for details. I will fix this.