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

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Newsgroups comp.lang.python
Date Thu, 28 Jun 2012 02:34:41 -0700 (PDT)
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On Thursday, June 28, 2012 7:47:24 AM UTC+2, Stefan Behnel wrote:
> Serhiy Storchaka, 28.06.2012 07:36:
> > On 28.06.12 00:14, Terry Reedy wrote:
> >> Another prediction: people who code Python without reading the manual,
> >> at least not for new features, will learn about 'u' somehow (such as by
> >> reading this list) and may do either of the following, both of which are
> >> bad.
> >>
> >> 1. They will confuse themselves by thinking that 'u' actually means
> >> somethings. They may then confuse others by writing about its supposed
> >> meaning. This might get amusing.
> >>
> >> 2. They will use 'u' in Python 3 only code, thereby making it
> >> incompatible with 3.2-, even if it otherwise would not be.
> >>
> >> These two actions will reinforce each other.
> > 
> > Yes, this is what I mean. I can even make a prediction: in just 5 years, as
> > this feature would be banned in a decent society. The authors of the books
> > will be strongly advise not to use it, and in software companies 'u' will
> > be prohibited in coding style. But get rid of this will be difficult.
> 
> Once Py2.7 is out of maintenance, we can deprecate that feature in one
> release and start warning about it in the next one. You're then free to use
> the corresponding 2to3 fixer to get it back out of your code with a single
> patch.
> 
> Stefan

On the other side, one can argue this (elegancy):

b'a serie of bytes'
u'a unicode, a serie of code points'

'python2? str? python3? encoded _unicode?'

jmf

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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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