You are right, my answer was over-engineered.
Instead of speculating about what else needs to be done if one decides 
to set PYTHONPATH, I should have just advised to use the OS specific 
method on setting up the "default" Python as Python3 and be with it.
Well, unless the dual Python is needed (git-p4 running with the Python 
different from system "default").

On 3/25/25 19:19, Junio C Hamano wrote:

Nikolay Shustov [off-list ref] writes:

quoted

git-p4 is designed to work both with Python 2 and Python 3.

However, changing just PYTHONPATH may not to be good enough.

In general, it is necessary to make having PYTHONPATH value and the
version of Python executable which application is run by, to be
coherent: Python executable has to be able to work correctly with the
libraries PYTHONPATH points to.

Hmph, but isn't that the core competence of those who package Python
to their target system?  If we run something with /usr/bin/python3,
without any strange customization, that binary ought to know where
it should pull its associated standard library files from, and we as
the language users do not have to worry about it, no?