pyinstaller - No module named 'scipy.spatial.transform._rotation_groups'

Today I tried to pack my simple python script with pyinstaller in Windows, and I found this error

ModuleNotFoundError: No module named ‘scipy.spatial.transform._rotation_groups’

The reason for this error is explained here

https://github.com/pyinstaller/pyinstaller/issues/5440#issuecomment-753600979

The problem is that scipy.spatial.transform.rotation is a compiled module, so its dependencies (in this case scipy.spatial.transform._rotation_groups) are not automatically picked up by dependency analysis.

Adding scipy.spatial.transform._rotation_groups to hiddenimports, either in your .spec file or via --hiddenimport command-line switch should fix the problem.

Here is a solution

https://github.com/pyinstaller/pyinstaller/issues/5454

I realized that these two issues were closed. The simplest way to solve this problem is upgrading my pyinstaller to its latest version (now is 5.0.1).

Problem solved.