Re: [Question] Moving from Python2 to Python3

From: Todd Zullinger <tmz@pobox.com>
Date: Mar 26, 2025, 01:02 UTC
Message-ID: <Z-NSGtV06NPE_C9D@teonanacatl.net>
In-Reply-To: <6977f08e-3c49-4bcc-9ab7-e3cc61a78396@gmail.com>

Nikolay Shustov wrote:

Show 9 quoted lines

> 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").

Perhaps you were conflating PYTHON_PATH, which brian suggested, with PYTHONPATH?

PYTHON_PATH is used by the git build system to set the path to the python executable, e.g.: /usr/bin/python2, /usr/bin/python3, etc.

PYTHONPATH is used by python itself to point to the location(s) of module files, similar to PATH, as you mentioned.

The Fedora distribution packaging set PYTHON_PATH to python2 or python3 while both were available and things worked well. Only python3 is supported now, and PYTHON_PATH is set accordingly.

That ought to work just as well for NonStop. If it doesn't, that would most likely be something to take up with the OS folks handling python3. :)

-- 
Todd