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Re: Why has python3 been created as a seperate language where there is still python2.7 ?

References (2 earlier) <mailman.1503.1340677684.4697.python-list@python.org> <4fe92df1$0$29978$c3e8da3$5496439d@news.astraweb.com> <CABicbJKUZbFFmeRYN+yOuup5qoiJauo2jMukTFSv-1ZApQydoQ@mail.gmail.com> <jsbl4q$v84$1@dough.gmane.org> <4FEADFB4.5090301@stackless.com>
Date 2012-06-27 21:02 +1000
Subject Re: Why has python3 been created as a seperate language where there is still python2.7 ?
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.1540.1340794958.4697.python-list@python.org> (permalink)

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On Wed, Jun 27, 2012 at 8:25 PM, Christian Tismer <tismer@stackless.com> wrote:
> I think, for the small importance of the print statement in code, it
> would have made the transition easier, if python 3 was as flexible
> as python 2.7, with a symmetric
>
> "from __past__ import print_statement" construct.
>

For how long? Will Python require, in perpetuity, the code to support
this? Must the print statement be enhanced when the print function is?
What about bug fixes? How much dev time is required to enable backward
compatibility past a boundary across which backward compatibility was
not promised? And if there's a limit to the duration of this __past__
directive, when should it be and what should happen after that point?

Much easier to simply say no.

ChrisA

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Re: Why has python3 been created as a seperate language where there is still python2.7 ? Michiel Overtoom <motoom@xs4all.nl> - 2012-06-25 12:10 +0200
  Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-25 19:28 -0700
    Re: Why has python3 been created as a seperate language where there is still python2.7 ? Jeremiah Dodds <jeremiah.dodds@gmail.com> - 2012-06-26 01:04 -0400
    Re: Why has python3 been created as a seperate language where there is still python2.7 ? Stefan Behnel <stefan_ml@behnel.de> - 2012-06-26 08:24 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-27 20:32 -0700
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-27 20:32 -0700
  Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-25 19:28 -0700
    Re: Why has python3 been created as a seperate language where there is still python2.7 ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-06-26 03:35 +0000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Terry Reedy <tjreedy@udel.edu> - 2012-06-26 00:33 -0400
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-06-26 02:15 -0400
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-06-26 07:40 +0000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Stefan Behnel <stefan_ml@behnel.de> - 2012-06-26 08:34 +0200
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-27 20:53 -0700
          Re: Why has python3 been created as a seperate language where there is still python2.7 ? alex23 <wuwei23@gmail.com> - 2012-06-27 21:05 -0700
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-27 20:53 -0700
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Christian Tismer <tismer@stackless.com> - 2012-06-27 12:25 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Chris Angelico <rosuav@gmail.com> - 2012-06-27 21:02 +1000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Stefan Behnel <stefan_ml@behnel.de> - 2012-06-27 13:22 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-06-27 07:24 -0400
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Chris Angelico <rosuav@gmail.com> - 2012-06-27 22:05 +1000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Christian Tismer <tismer@stackless.com> - 2012-06-27 15:15 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Stefan Behnel <stefan_ml@behnel.de> - 2012-06-27 15:44 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Chris Angelico <rosuav@gmail.com> - 2012-06-27 23:44 +1000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Christian Tismer <tismer@stackless.com> - 2012-06-27 16:34 +0200
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Serhiy Storchaka <storchaka@gmail.com> - 2012-06-27 21:58 +0300
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Serhiy Storchaka <storchaka@gmail.com> - 2012-06-27 22:08 +0300
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Terry Reedy <tjreedy@udel.edu> - 2012-06-27 17:14 -0400
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Christian Tismer <tismer@stackless.com> - 2012-06-28 00:11 +0200
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? alex23 <wuwei23@gmail.com> - 2012-06-27 17:44 -0700
          Re: Why has python3 been created as a seperate language where there is still python2.7 ? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-06-28 04:32 +0000
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? rantingrickjohnson@gmail.com - 2012-06-27 20:25 -0700
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Serhiy Storchaka <storchaka@gmail.com> - 2012-06-28 08:36 +0300
      Re: Why has python3 been created as a seperate language where there is still python2.7 ? Stefan Behnel <stefan_ml@behnel.de> - 2012-06-28 07:47 +0200
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? wxjmfauth@gmail.com - 2012-06-28 02:34 -0700
        Re: Why has python3 been created as a seperate language where there is still python2.7 ? wxjmfauth@gmail.com - 2012-06-28 02:34 -0700
          Re: Why has python3 been created as a seperate language where there is still python2.7 ? Chris Angelico <rosuav@gmail.com> - 2012-06-28 20:14 +1000
    Re: Why has python3 been created as a seperate language where there is still python2.7 ? Roy Smith <roy@panix.com> - 2012-06-27 07:45 -0400

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