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Groups > linux.debian.maint.python > #9735

Re: MBF for deprecating Python2 usage

From Diane Trout <diane@ghic.org>
Newsgroups linux.debian.maint.python
Subject Re: MBF for deprecating Python2 usage
Date 2017-08-08 05:10 +0200
Message-ID <uc345-1QI-7@gated-at.bofh.it> (permalink)
References (6 earlier) <ubZMR-7qT-11@gated-at.bofh.it> <ubZWy-7wz-3@gated-at.bofh.it> <uc1F0-zY-7@gated-at.bofh.it> <uc1Ym-HL-17@gated-at.bofh.it> <uc2hI-1b4-3@gated-at.bofh.it>
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> What tearing need is there to change what the command ‘python’ does,
> in
> a backward-incompatible way?

Personally, I'm ready for python to point to python3 now.

I'm tired of writing python 2/3 compatible code because someone _might_
launch a script with "python my_python3_script.py instead of
./my_python3_script.py

Python has been remarkably good at avoiding breakage, but I've seen
other scripting languages have serious incompatibilities with far less
warning.

For example R packages need to be recompiled for point release updates.
Some perl scripts we inherited broke somewhere between perl 5.8 and
5.12.

Users have tools like virtualenv or conda to deal with the
incompatibilities.

It might be useful to add an option to the interpreter where if a
python script is launched without a usr/bin/python2 or usr/bin/python3
header it reports a deprecation warning (either to console or syslog)
so it's easier to find programs that still need updating.

Diane

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Thread

MBF for deprecating Python2 usage Matthias Klose <doko@debian.org> - 2017-08-04 00:00 +0200
  Re: MBF for deprecating Python2 usage barry@debian.org - 2017-08-04 03:10 +0200
    Re: MBF for deprecating Python2 usage Scott Kitterman <debian@kitterman.com> - 2017-08-04 05:30 +0200
      Re: MBF for deprecating Python2 usage Piotr Ożarowski <piotr@debian.org> - 2017-08-04 08:10 +0200
      Re: MBF for deprecating Python2 usage barry@debian.org - 2017-08-04 16:20 +0200
        Re: MBF for deprecating Python2 usage Ole Streicher <olebole@debian.org> - 2017-08-04 17:10 +0200
          Re: MBF for deprecating Python2 usage Barry Warsaw <barry@debian.org> - 2017-08-04 17:50 +0200
        Re: MBF for deprecating Python2 usage Scott Kitterman <debian@kitterman.com> - 2017-08-04 23:10 +0200
          Re: MBF for deprecating Python2 usage Barry Warsaw <barry@debian.org> - 2017-08-05 03:40 +0200
            Re: MBF for deprecating Python2 usage Scott Kitterman <debian@kitterman.com> - 2017-08-05 04:10 +0200
          Re: MBF for deprecating Python2 usage Geoffrey Thomas <geofft@ldpreload.com> - 2017-08-08 00:50 +0200
        Re: MBF for deprecating Python2 usage Diane Trout <diane@ghic.org> - 2017-08-08 00:00 +0200
          Re: MBF for deprecating Python2 usage Barry Warsaw <barry@debian.org> - 2017-08-08 00:50 +0200
            Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 01:40 +0200
              Re: MBF for deprecating Python2 usage Diane Trout <diane@ghic.org> - 2017-08-08 01:50 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 03:40 +0200
                Re: MBF for deprecating Python2 usage Barry Warsaw <barry@debian.org> - 2017-08-08 04:00 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 04:20 +0200
                Re: MBF for deprecating Python2 usage Diane Trout <diane@ghic.org> - 2017-08-08 05:10 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 05:30 +0200
                Re: MBF for deprecating Python2 usage Diane Trout <diane@ghic.org> - 2017-08-08 05:40 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 06:00 +0200
                Re: MBF for deprecating Python2 usage Barry Warsaw <barry@debian.org> - 2017-08-08 07:00 +0200
                Re: MBF for deprecating Python2 usage Geoffrey Thomas <geofft@ldpreload.com> - 2017-08-08 04:10 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 04:30 +0200
                Re: MBF for deprecating Python2 usage Diane Trout <diane@ghic.org> - 2017-08-08 05:20 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 05:40 +0200
                Re: MBF for deprecating Python2 usage Steve Langasek <vorlon@debian.org> - 2017-08-08 07:30 +0200
                Re: MBF for deprecating Python2 usage Ben Finney <bignose@debian.org> - 2017-08-08 08:20 +0200
                Re: MBF for deprecating Python2 usage Geoffrey Thomas <geofft@ldpreload.com> - 2017-08-10 17:40 +0200
                Re: MBF for deprecating Python2 usage Ole Streicher <olebole@debian.org> - 2017-08-08 21:20 +0200
                Re: MBF for deprecating Python2 usage Scott Kitterman <debian@kitterman.com> - 2017-08-08 21:30 +0200
    Re: MBF for deprecating Python2 usage Matthias Klose <doko@debian.org> - 2017-08-04 13:00 +0200
      Re: MBF for deprecating Python2 usage Scott Kitterman <debian@kitterman.com> - 2017-08-04 14:40 +0200
  Re: MBF for deprecating Python2 usage Adrian Bunk <bunk@debian.org> - 2017-08-07 00:00 +0200
  Re: MBF for deprecating Python2 usage Adrian Bunk <bunk@debian.org> - 2017-08-07 01:00 +0200
  Re: MBF for deprecating Python2 usage Christian Seiler <christian@iwakd.de> - 2017-08-07 01:10 +0200

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