Re: Stop writing Python 4 incompatible code

From	Chris Angelico <rosuav@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: Stop writing Python 4 incompatible code
Date	2016-01-14 03:38 +1100
Message-ID	<mailman.111.1452703135.13488.python-list@python.org> (permalink)
References	<5695fd0e$0$11119$c3e8da3@news.astraweb.com> <0529e7d6-0de1-4e38-9a19-2b5ed1ecc39f@googlegroups.com> <1452702320.2982810.491094826.69EA5C7D@webmail.messagingengine.com>

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On Thu, Jan 14, 2016 at 3:25 AM, Random832 <random832@fastmail.com> wrote:
> On Wed, Jan 13, 2016, at 09:21, sjmsoft@gmail.com wrote:
>> This strikes me as very good advice.  Thanks for being so far-sighted.
>> And let's hope that Python 4 has fewer incompatibilities (none would
>> good) than Python 3!
>
> Who says there's going to be a Python 4? I always assumed 3.9 would be
> followed by 3.10.

There most likely will be a Python 4.0 at some point. One theory is
that 3.9 will be followed by 4.0, which will technically have some
backward-incompatible changes (hence it would be inappropriate to call
it 3.10), but in practical terms, good Py3.9 code will be identical to
good Py4.0 code - it'll just remove things that got deprecated during
the 3.x lifecycle.

ChrisA

Thread

Stop writing Python 4 incompatible code Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-01-13 18:30 +1100
  Re: Stop writing Python 4 incompatible code sjmsoft@gmail.com - 2016-01-13 06:21 -0800
    Re: Stop writing Python 4 incompatible code Random832 <random832@fastmail.com> - 2016-01-13 11:25 -0500
      Re: Stop writing Python 4 incompatible code Steven D'Aprano <steve@pearwood.info> - 2016-01-14 11:10 +1100
        Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-13 22:40 -0200
          Re: Stop writing Python 4 incompatible code Steven D'Aprano <steve@pearwood.info> - 2016-01-14 12:02 +1100
            Re: Stop writing Python 4 incompatible code Michael Torrie <torriem@gmail.com> - 2016-01-13 18:24 -0700
            Re: Stop writing Python 4 incompatible code Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-01-13 21:39 -0500
            Re: Stop writing Python 4 incompatible code Gene Heskett <gheskett@wdtv.com> - 2016-01-13 21:59 -0500
            Re: Stop writing Python 4 incompatible code Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-01-14 07:41 -0500
            Re: Stop writing Python 4 incompatible code Peter Otten <__peter__@web.de> - 2016-01-14 14:43 +0100
            Re: Stop writing Python 4 incompatible code "D'Arcy J.M. Cain" <darcy@VybeNetworks.com> - 2016-01-14 08:47 -0500
            Re: Stop writing Python 4 incompatible code Peter Otten <__peter__@web.de> - 2016-01-14 16:32 +0100
            Re: Stop writing Python 4 incompatible code "D'Arcy J.M. Cain" <darcy@VybeNetworks.com> - 2016-01-14 10:47 -0500
            Re: Stop writing Python 4 incompatible code Peter Otten <__peter__@web.de> - 2016-01-14 17:52 +0100
            Re: Stop writing Python 4 incompatible code Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-01-15 16:08 +1300
              Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-15 15:56 +1100
                Re: Stop writing Python 4 incompatible code Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-01-16 10:02 +1300
              Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-15 09:40 -0200
          Re: Stop writing Python 4 incompatible code Robin Koch <robin.koch@t-online.de> - 2016-01-15 19:29 +0100
            Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-15 16:43 -0200
        Re: Stop writing Python 4 incompatible code Terry Reedy <tjreedy@udel.edu> - 2016-01-13 19:53 -0500
        Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-13 17:02 -0800
          Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-14 12:29 +1100
          Re: Stop writing Python 4 incompatible code Michael Torrie <torriem@gmail.com> - 2016-01-13 19:11 -0700
            Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-13 18:51 -0800
              Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-14 14:08 +1100
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-13 19:29 -0800
                Re: Stop writing Python 4 incompatible code Michael Torrie <torriem@gmail.com> - 2016-01-13 22:18 -0700
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-14 07:30 -0800
                Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-15 04:41 +1100
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-14 10:40 -0800
                Re: Stop writing Python 4 incompatible code <paul.hermeneutic@gmail.com> - 2016-01-14 13:16 -0700
                Re: Stop writing Python 4 incompatible code Steven D'Aprano <steve@pearwood.info> - 2016-01-15 09:04 +1100
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-14 15:16 -0800
                Re: Stop writing Python 4 incompatible code Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-01-14 19:16 +1100
                Re: Stop writing Python 4 incompatible code wxjmfauth@gmail.com - 2016-01-14 01:37 -0800
          Re: Stop writing Python 4 incompatible code Terry Reedy <tjreedy@udel.edu> - 2016-01-14 00:45 -0500
            Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-14 07:52 -0800
              Re: Stop writing Python 4 incompatible code Ian Kelly <ian.g.kelly@gmail.com> - 2016-01-14 15:52 -0700
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-14 15:55 -0800
                Re: Stop writing Python 4 incompatible code Emile van Sebille <emile@fenx.com> - 2016-01-15 06:52 -0800
                Re: Stop writing Python 4 incompatible code Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-01-16 09:49 +1300
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-15 14:34 -0800
                Re: Stop writing Python 4 incompatible code Rick Johnson <rantingrickjohnson@gmail.com> - 2016-01-15 13:45 -0800
                Re: Stop writing Python 4 incompatible code William Ray Wing <wrw@mac.com> - 2016-01-15 12:02 -0500
                Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-15 16:09 -0200
                Re: Stop writing Python 4 incompatible code Alister <alister.ware@ntlworld.com> - 2016-01-15 18:46 +0000
                Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-15 16:55 -0200
                Re: Stop writing Python 4 incompatible code Alister <alister.ware@ntlworld.com> - 2016-01-16 14:41 +0000
                Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-16 12:48 -0200
                Re: Stop writing Python 4 incompatible code paul.hermeneutic@gmail.com - 2016-01-16 09:08 -0700
                Re: Stop writing Python 4 incompatible code William Ray Wing <wrw@mac.com> - 2016-01-16 13:00 -0500
                Re: Stop writing Python 4 incompatible code Michael Torrie <torriem@gmail.com> - 2016-01-16 12:26 -0700
                Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-17 13:43 +1100
                Re: Stop writing Python 4 incompatible code William Ray Wing <wrw@mac.com> - 2016-01-15 13:49 -0500
                Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-15 16:53 -0200
                Re: Stop writing Python 4 incompatible code Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-01-15 20:58 +0000
                Re: Stop writing Python 4 incompatible code Christopher Reimer <christopher_reimer@icloud.com> - 2016-01-15 14:09 -0800
                Re: Stop writing Python 4 incompatible code Christopher Reimer <christopher_reimer@icloud.com> - 2016-01-16 20:51 -0800
    Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-14 03:38 +1100
  Re: Stop writing Python 4 incompatible code Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-01-14 10:38 +1300
    Re: Stop writing Python 4 incompatible code Bernardo Sulzbach <mafagafogigante@gmail.com> - 2016-01-13 19:46 -0200
  Re: Stop writing Python 4 incompatible code BartC <bc@freeuk.com> - 2016-01-14 01:02 +0000
    Re: Stop writing Python 4 incompatible code Chris Angelico <rosuav@gmail.com> - 2016-01-14 12:21 +1100
      Re: Stop writing Python 4 incompatible code BartC <bc@freeuk.com> - 2016-01-14 01:49 +0000

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