pip/pip3 confusion and keeping up to date
Chris Green
cl at isbd.net
Sun Nov 5 10:00:41 EST 2023
Jon Ribbens <jon+usenet at unequivocal.eu> wrote:
> On 2023-11-03, Karsten Hilbert <Karsten.Hilbert at gmx.net> wrote:
> > Am Thu, Nov 02, 2023 at 04:07:33PM -0600 schrieb Mats Wichmann via Python-list:
> >> >So they now have only python3 and there is no python executable in
> >> >PATH.
> >>
> >> FWIW, for this you install the little stub package python-is-python3.
> >> Especially if you want to keep a python2 installation around -
> >> "python" will still be python3 in this case.
> >
> > Since you seem knowledgeable in this area: Do you know of a
> > resource for learning the *canonical* way of packaging a
> > Python application for installation via apt which
> >
> > - needs some packages available via apt
> > - needs some packages only available via pip
> > - needs some packages newer than what is available via apt
> >
> > ?
>
> I suspect the answer to that is that you would have to:
>
> * create packages yourself for the unpackaged dependencies
> * create a dependency graph of *every* Python package in the package
> repository (whether or not the package is relevant to what you're doing)
> * work out what versions of every Python package are required in order
> to have a dependency graph that can be successfully resolved, taking
> into account the requirements of your new package also
> * contact every single maintainer of every single one of the packages
> that needs updating and persuade them to update their packages and
> reassure them that you are getting all the other package maintainers
> to update their packages accordingly and that you have a plan and
> that you know what you're doing
>
> ... screen fades to black, title card "3 years later", fade in to ...
>
> * publish your package
>
Surely it's not that bad, the vast bulk of Debian, Ubuntu and other
distributions are installed via systems that sort out dependencies once
given a particular package's requirements. Python is surely not
unique in its dependency requirements.
--
Chris Green
ยท
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