No module named 'optree' in default python 3 Script Editor

[eirannejad (Ehsan Iran-Nejad)]

Update:

Problem using CPython Libraries

A major case where this error happens seems to be related to package install failures in pip. Sometimes when pip is trying to install a package that has a numpy dependency (or any other module for that matter), it tries to delete the existing numpy installation and WILL fail if numpy is already loaded inside of Rhino (e.g. _multiarray_umath.cp39-win_amd64 dll is locked and can not be removed). So we end up with an invalid environment that contains a folder named numpy but with half the internal …