bug#70722: [PATCH] ; Migrate to python3 for (package-test-update-archives-async)

[Eli Zaretskii <eliz@gnu.org>]

> From: Lin Sun <sunlin7.mail@gmail.com>
> Date: Mon, 6 May 2024 00:28:07 +0000
> Cc: 70722@debbugs.gnu.org
> 
> On Thu, May 2, 2024 at 6:55 PM Eli Zaretskii <eliz@gnu.org> wrote:
> >
> > > From: Lin Sun <sunlin7.mail@gmail.com>
> > > Date: Thu, 2 May 2024 18:11:04 +0000
> > >
> > > The test case "package-test-update-archives-async" still tries to
> > > search "python2" for testing, while python2 was at the end of its life
> > > years ago.
> > > So move the test case from python2 to python3.
> >
> > I'd prefer to make the test support both Python 2.x and Python 3.x.
> > The fact that python.org end-of-life'd Python 2 doesn't mean we have
> > to jump to attention and follow suit.  Old systems might still have
> > Python 2 installed, and there's no need to drop them.
> >
> > I do agree that we should try looking for Python 3 first, and only
> > afterwards for Python 2.
> >
> > Also, I think the test should start by looking for just "python",
> > before the versioned variants.
> >
> > E.g., on my system (executable-find "python3") returns nil, although I
> > have Python 3.x installed -- but it's installed under the name
> > "python".
> Thanks for the comment, and it's true that python2 will still exist
> for many years.
> And I had changed the test case to adapt python/python3/python2 automatically.
> Please help review the new patch. Thanks.

Thanks.

kobarity, any comments, or should I install this?