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Re: The python command in Debian

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From Sandro Tosi <morph@debian.org>
Newsgroups linux.debian.maint.python
Subject Re: The python command in Debian
Date Thu, 16 Jul 2020 18:10:02 +0200
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> It seems to be a little bit more controversial what should happen to the python
> command in the long term.  Some people argue that python should never point to
> python3, because it's incompatible,

> however Debian will have difficulties to
> explain that decision to users who start with Python3 and are not aware of the 2
> to 3 transition.

can you explain this point? i think if a new developer starts with
python3 now (and i have plenty of examples at my company) they just
use `python3` on the commandline, shebangs, venv, etc. I dont see the
confusion we would create.

> So yes, in the long term, Debian should have a python command
> again.

I dont think that's the right decision. PEP 0394
(https://www.python.org/dev/peps/pep-0394/) allows distribution not to
ship `python` at all:

https://www.python.org/dev/peps/pep-0394/#for-python-runtime-distributors

* If the python command is installed, it is expected to invoke either
the same version of Python as the python3 command or as the python2
command.
* Distributors may choose to set the behavior of the python command as follows:
** python2,
** python3,
** not provide python command,
** allow python to be configurable by an end user or a system administrator.

> One solution could be not to ship the python command in bullseye, forcing users
> to adjust their local installations.

it is my opinion that that's what we should do: not ship `python` at
all and have users/packagers/developers use either python2 or python3
as needed, and not to reintroduce `python` at a later time.

Regards,
-- 
Sandro "morph" Tosi
My website: http://sandrotosi.me/
Me at Debian: http://wiki.debian.org/SandroTosi
Twitter: https://twitter.com/sandrotosi

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Thread

The python command in Debian Matthias Klose <doko@debian.org> - 2020-07-09 15:30 +0200
  Re: The python command in Debian Jeremy Stanley <fungi@yuggoth.org> - 2020-07-09 19:00 +0200
    Re: The python command in Debian paultag@debian.org - 2020-07-09 19:50 +0200
  Re: The python command in Debian Ondrej Novy <novy@ondrej.org> - 2020-07-09 21:50 +0200
    Re: The python command in Debian Fabrice BAUZAC-STEHLY <noon@mykolab.com> - 2020-07-13 18:30 +0200
      Re: The python command in Debian Matthias Klose <doko@debian.org> - 2020-07-13 19:30 +0200
        Re: The python command in Debian Ondrej Novy <novy@ondrej.org> - 2020-07-14 11:00 +0200
          Re: The python command in Debian Piotr Ożarowski <piotr@debian.org> - 2020-07-14 11:20 +0200
            Re: The python command in Debian Rene Engelhard <rene.engelhard@mailbox.org> - 2020-07-18 08:50 +0200
              Re: The python command in Debian Sebastian Humenda <shumenda@gmx.de> - 2020-07-18 10:30 +0200
                Re: The python command in Debian debacle@debian.org - 2020-07-18 10:40 +0200
                Re: The python command in Debian Dmitry Shachnev <mitya57@debian.org> - 2020-07-18 11:30 +0200
  Re: The python command in Debian Sandro Tosi <morph@debian.org> - 2020-07-16 18:10 +0200
  Re: The python command in Debian "Nicolas Dandrimont" <olasd@debian.org> - 2020-09-17 15:20 +0200
    Re: The python command in Debian Matthias Klose <doko@debian.org> - 2020-09-17 15:40 +0200
  Re: The python command in Debian Matthias Klose <doko@debian.org> - 2021-03-02 10:50 +0100

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