[solved] Current Python Version Selection

[jagdpanther]

I know that "eselect python" is the old way to select python versions. Also according to https://wiki.gentoo.org/wiki/Python "eslect python" still is a wrapper to /etc/python-exec/python-exec.conf. The only uncommented lines in my /etc/python-exec/python-exec.conf are:

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python3.12
python3.11

So why is my gentoo system reporting that it will remove python-3.11 when I run "emerge --depclean -p" ?

(I want to keep python-3.11 because I have some 3rd party stuff, stable diffusion, that currently uses python-3.11.)

Where is the documentation for the current proper way to tell Portage to keep a specified version of Python?

Thanks.

[bstaletic]

Either your @world does not mention dev-lang/python or it has no version nor slot specification.
Your entire system can be rebuilt with just python 3.12, so portage is fine with trying to remove python 3.11.
python-exec.conf is not in this equation at all.

What you can do is add python 3.11 to your world set. emerge -u python:3.11 should do the trick.
That way, some version of python 3.11 will remain in your @world set.

[jagdpanther]

bstaletic:

Thank you. Your suggestion fixed the issue.
(And you were correct, I checked /var/lib/portage/world and there were no dev-lang/python:3.x entries.)

[jagdpanther]

python-exec.conf is not in this equation at all.

I guess I did not read that statement properly: I commented out the two lines in /etc/python-exec/python-exec.conf from my original post. Everything seemed to work fine. Then python3.13 was pushed out via portage but is not the system python. I then tried to run pithos and received:

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Traceback (most recent call last):
  File "/usr/bin/pithos", line 8, in <module>
    from gi.repository import Gio
ModuleNotFoundError: No module named 'gi'

media-sound/pithos-1.6.2 is a python script launched with

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#!/usr/bin/env python3

With all lines commented out in python-exec.conf I get:

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$ eselect python list
Available Python interpreters, in order of preference:
  [1]   python3.13 (fallback)
  [2]   python3.12 (fallback)
  [3]   python3.11 (fallback)

So I changed python-exec.conf to:

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python3.12
python3.13
python3.11

Which fixes the issue and now have:

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$ eselect python list
Available Python interpreters, in order of preference:
  [1]   python3.12
  [2]   python3.13
  [3]   python3.11

Is modifying /etc/python-exec/python-exec.conf the current Gentoo suggested method of choosing which python3 is run by default?

[logrusx]

emerge -u python:3.11 should do the trick.

emerge --norepalce should have done the trick. There's no need to recompile something that's already there.

Best Regards,
Georgi