Another bug discovered by accident - sh** happens :)

python-devel (python2 variant) has a dependency on /usr/bin/python3 - which
sounds just weird

digging a bit into the files and their headers, the offending file seems to be
(in pyton-devel):

/usr/lib64/python2.7/test/bisect.py:#!/usr/bin/python3

It being installed in py2.7 directories should imply it also wants to use
python2.7

There is a 2nd file in python-devel that references python3, but that is likely
less damaging:

/usr/lib64/python2.7/config/Makefile.pre:PYTHON_FOR_REGEN=python3