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Re: A desperate lunge for on-topic-ness

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From Ian Kelly <ian.g.kelly@gmail.com>
Date Mon, 22 Oct 2012 16:02:34 -0600
Subject Re: A desperate lunge for on-topic-ness
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On Mon, Oct 22, 2012 at 1:03 AM, Chris Angelico <rosuav@gmail.com> wrote:
> Python's system "just works" most of
> the time, but can introduce yet another trap for the unsuspecting
> newbie who doesn't understand the difference between rebinding and
> mutating; I've not looked into multiple levels of closures but I
> suspect there'll be odd limitations there, as there's only one
> "nonlocal" keyword.

On my wishlist for Python is a big, fat SyntaxError for any variable
that could be interpreted as either local or nonlocal and is not
explicitly declared as either.  It would eliminate this sort of
confusion entirely and make code that shadows nonlocal variables much
more readable.

Ideally, the same thing would also be done for locals that shadow
globals, but I don't see how that could possibly be enforced at
compile time.

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Re: A desperate lunge for on-topic-ness Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-10-19 11:21 +0200
  Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-19 22:14 +0000
    Re: A desperate lunge for on-topic-ness Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-10-19 20:23 -0400
      Re: A desperate lunge for on-topic-ness Grant Edwards <invalid@invalid.invalid> - 2012-10-20 14:18 +0000
        Re: A desperate lunge for on-topic-ness Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-10-20 15:10 -0400
        Re: A desperate lunge for on-topic-ness Walter Hurry <walterhurry@lavabit.com> - 2012-10-20 20:02 +0000
        Re: A desperate lunge for on-topic-ness David Robinow <drobinow@gmail.com> - 2012-10-20 16:02 -0400
        Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-21 08:07 +0000
          Re: A desperate lunge for on-topic-ness Chris Angelico <rosuav@gmail.com> - 2012-10-21 20:20 +1100
            Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-21 10:00 +0000
              Re: printing (was: A desperate lunge for on-topic-ness) Tim Chase <python.list@tim.thechases.com> - 2012-10-21 06:03 -0500
              Re: A desperate lunge for on-topic-ness Chris Angelico <rosuav@gmail.com> - 2012-10-21 22:43 +1100
                Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-21 19:11 +0000
                Re: A desperate lunge for on-topic-ness Grant Edwards <invalid@invalid.invalid> - 2012-10-21 19:23 +0000
                Re: A desperate lunge for on-topic-ness Roy Smith <roy@panix.com> - 2012-10-21 16:19 -0400
                Re: A desperate lunge for on-topic-ness Chris Angelico <rosuav@gmail.com> - 2012-10-22 07:38 +1100
                Re: A desperate lunge for on-topic-ness Chris Angelico <rosuav@gmail.com> - 2012-10-22 07:22 +1100
                Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-22 06:30 +0000
                Re: A desperate lunge for on-topic-ness Chris Angelico <rosuav@gmail.com> - 2012-10-22 18:03 +1100
                Re: A desperate lunge for on-topic-ness Roy Smith <roy@panix.com> - 2012-10-22 08:29 -0400
                RE: A desperate lunge for on-topic-ness "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2012-10-22 20:48 +0000
                Re: A desperate lunge for on-topic-ness Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-22 16:02 -0600
                Re: A desperate lunge for on-topic-ness Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-10-22 21:39 -0400
                Re: A desperate lunge for on-topic-ness Joshua Landau <joshua.landau.ws@gmail.com> - 2012-10-23 08:35 +0100
                Re: A desperate lunge for on-topic-ness Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-23 10:50 -0600
                Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-23 22:34 +0000
                Re: A desperate lunge for on-topic-ness Ian Kelly <ian.g.kelly@gmail.com> - 2012-10-23 17:24 -0600
                Re: A desperate lunge for on-topic-ness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-24 00:04 +0000
          Re: A desperate lunge for on-topic-ness Gene Heskett <gheskett@wdtv.com> - 2012-10-21 07:08 -0400
          Re: A desperate lunge for on-topic-ness Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-10-21 12:42 -0400
        Re: A desperate lunge for on-topic-ness DJC <djc@news.invalid> - 2012-10-21 15:06 +0100
    Re: A desperate lunge for on-topic-ness Tim Chase <python.list@tim.thechases.com> - 2012-10-19 22:27 -0500
      Re: A desperate lunge for on-topic-ness rusi <rustompmody@gmail.com> - 2012-10-20 00:35 -0700
    Re: A desperate lunge for on-topic-ness Roy Smith <roy@panix.com> - 2012-10-20 16:37 -0400
      Re: A desperate lunge for on-topic-ness Walter Hurry <walterhurry@lavabit.com> - 2012-10-21 21:58 +0000

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