The problem becomes clear. test_basedirectory.py contains the line
from imp import reload
with python3.11, it generates a deprecation warning: the module imp is
deprecated, and will be removed in python3.12. Now in python3.12 it *has*
been removed. And, instead of a warning, we get a fatal error.
I need to read about replacing from imp import <something> by something supported. Andrey
