Re: Defeat Python "Virtual Environment" in Fedora ?

From	rbowman <bowman@montana.com>
Newsgroups	comp.os.linux.misc
Subject	Re: Defeat Python "Virtual Environment" in Fedora ?
Date	2026-03-12 02:11 +0000
Message-ID	<n1eln6F44tcU1@mid.individual.net> (permalink)
References	(11 earlier) <Mz-dncj6_cJ1IzL0nZ2dnZfqn_WdnZ2d@giganews.com> <10opbd6$aupd$1@dont-email.me> <ToScnRzIUalo0y30nZ2dnZfqn_SdnZ2d@giganews.com> <2l368m-do5.ln1@lazy.lzy> <10osioo$3e4cl$1@dont-email.me>

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On Wed, 11 Mar 2026 20:19:35 +0000, Pancho wrote:

> My understanding is different. My understanding is that a venv only uses
> packages installed locally in the venv.  It shouldn't default to a
> global package if it is not found in the venv.

You can use --system-site-packages.

https://docs.python.org/3/library/venv.html

https://jonny0211.medium.com/python-virtualenv-and-venv-dos-and-donts-
abf1b83cf943

One example is something I've just been playing with. Fedora 44 (beta) has 
PyQt5 in the system site packages. PyQt6 doesn't massively break stuff but 
there are differences so I'd rather start using it. 

I could create a venv and use pip to install PyQt6. otoh, with Fedora 'dnf 
install pyqt6' will install it in the system packages. It isn't the hugest 
package but if I have a project that also uses packages not in the site-
packages, --system-site-packages will pick it up and I can use pip to 
install the other packages in the venv.

Even more complicated PySide6 is not available from the Fedora 
repositories. Also, it still isn't compatible with Python 3.14, the 
default for Fedora 44. (and 43). In this case I need to use a venv, and I 
also used uv so the venv would by base on the 3.13 Python still on the 
machine. Then I can use 'uv pip install pyside6' and get on with life.

As the second link says for a quick and dirty script you probably can get 
by without a venv.  After making some edits to a simple PyQt5 script to 
update to PyQt6 I can run it outside of an venv, but only because I could 
install the PyQt6 packages to the system site-packages.  On Ubuntu 25.10 I 
would be out of luck since that package isn't in the Ubuntu repositories.

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Thread

Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-08 05:31 -0400
  Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-08 18:57 +0000
    Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-08 19:54 +0000
      Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-08 21:44 +0000
        Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-08 22:05 +0000
          Re: Defeat Python "Virtual Environment" in Fedora ? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-03-09 00:27 +0000
            Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-08 21:14 -0400
              Re: Defeat Python "Virtual Environment" in Fedora ? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-03-09 02:47 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Rich <rich@example.invalid> - 2026-03-09 02:59 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-09 00:23 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-09 03:55 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-09 00:28 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Jon Ribbens <jon+usenet@unequivocal.eu> - 2026-03-09 08:16 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-09 13:59 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-10 02:49 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-10 08:47 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-10 06:14 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Rich <rich@example.invalid> - 2026-03-10 14:55 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-10 13:03 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Jon Ribbens <jon+usenet@unequivocal.eu> - 2026-03-10 17:09 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-11 02:48 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-11 07:32 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-11 08:40 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Gilmeh Serda <gilmeh.serda@nothing.here.invalid> - 2026-03-13 06:07 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-13 02:48 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Jon Ribbens <jon+usenet@unequivocal.eu> - 2026-03-11 11:58 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-10 17:56 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Rich <rich@example.invalid> - 2026-03-10 18:13 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-10 23:51 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Piergiorgio Sartor <piergiorgio.sartor.this.should.not.be.used@nexgo.REMOVETHIS.de> - 2026-03-10 19:14 +0100
                Re: Defeat Python "Virtual Environment" in Fedora ? mm0fmf <none@invalid.com> - 2026-03-11 17:14 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Pancho <Pancho.Jones@protonmail.com> - 2026-03-11 20:19 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Piergiorgio Sartor <piergiorgio.sartor.this.should.not.be.used@nexgo.REMOVETHIS.de> - 2026-03-11 21:51 +0100
                Re: Defeat Python "Virtual Environment" in Fedora ? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-11 21:35 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-12 02:14 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-12 02:11 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Nuno Silva <nunojsilva@invalid.invalid> - 2026-03-12 10:39 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-12 20:51 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Pancho <Pancho.Jones@protonmail.com> - 2026-03-13 09:34 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-13 21:49 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Pancho <Pancho.Jones@protonmail.com> - 2026-03-13 23:28 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-14 01:17 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-14 03:21 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? The Natural Philosopher <tnp@invalid.invalid> - 2026-03-14 12:23 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-14 19:18 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-10 19:36 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-10 18:26 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-09 00:03 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 08:59 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 08:52 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-03-09 16:34 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 22:17 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-10 02:38 -0400
              Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 08:41 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Nuno Silva <nunojsilva@invalid.invalid> - 2026-03-09 09:45 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-10 06:21 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-10 18:24 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-11 04:20 -0400
                Re: Defeat Python "Virtual Environment" in Fedora ? Rich <rich@example.invalid> - 2026-03-11 18:52 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-11 19:39 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Rich <rich@example.invalid> - 2026-03-11 20:14 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Richard Kettlewell <invalid@invalid.invalid> - 2026-03-11 23:00 +0000
                Re: Defeat Python "Virtual Environment" in Fedora ? Pancho <Pancho.Jones@protonmail.com> - 2026-03-10 15:02 +0000
            Re: Defeat Python "Virtual Environment" in Fedora ? Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-03-09 01:36 +0000
            Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 08:36 +0000
          Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 01:34 +0000
            Re: Defeat Python "Virtual Environment" in Fedora ? c186282 <c186282@nnada.net> - 2026-03-08 22:11 -0400
              Re: Defeat Python "Virtual Environment" in Fedora ? rbowman <bowman@montana.com> - 2026-03-09 08:26 +0000

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