Groups > comp.lang.python > #19755

Re: Question about name scope

References	(4 earlier) <4F29BB9C.70405@stoneleaf.us> <CALwzid=qdawuq7qd2Qyj9xR1jUo-KLhYMKDwLxDHX06ZJ8aDOw@mail.gmail.com> <4F29C255.1050009@stoneleaf.us> <CALwzidkEL14pG3m3Pb=fQQin-YUTTwJ1PF4bCJaV3OYfwB2zTw@mail.gmail.com> <4F29CDC7.2000104@stoneleaf.us>
From	Ian Kelly <ian.g.kelly@gmail.com>
Date	2012-02-01 16:47 -0700
Subject	Re: Question about name scope
Newsgroups	comp.lang.python
Message-ID	<mailman.5334.1328140110.27778.python-list@python.org> (permalink)

Show all headers | View raw

On Wed, Feb 1, 2012 at 4:41 PM, Ethan Furman <ethan@stoneleaf.us> wrote:
> I'm not sure what you mean by temporary:
>
> --> def f(x, y):
>
> ...     frob = None
> ...     loc = locals()
> ...     loc[x] = y
> ...     print(loc)
> ...     print(locals())
> ...     print(loc)
> ...     print(locals())
> ...
> -->
> --> f('frob', 19)
> {'y': 19, 'x': 'frob', 'frob': 19}
> {'y': 19, 'x': 'frob', 'frob': None, 'loc': {...}}
> {'y': 19, 'x': 'frob', 'frob': None, 'loc': {...}}
> {'y': 19, 'x': 'frob', 'frob': None, 'loc': {...}}
>
> Seems to be stuck that way.

The first print is the one that is incorrect.  It suggests that the
local 'frob' has been changed to 19 as it has in the dict, but the
actual value of the local is still None.  The second print on
accurately reflect that.

Thread

Question about name scope Olive <diolu@bigfoot.com> - 2012-02-01 18:11 +0100
  Re: Question about name scope Rick Johnson <rantingrickjohnson@gmail.com> - 2012-02-01 09:21 -0800
  Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 09:43 -0800
  Re: Question about name scope Dave Angel <d@davea.name> - 2012-02-01 12:36 -0500
    Re: Question about name scope Mel Wilson <mwilson@the-wire.com> - 2012-02-01 13:47 -0500
      Re: Question about name scope Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-01 14:49 -0700
      Re: Question about name scope Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-01 15:38 -0700
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 14:24 -0800
      Re: Question about name scope Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-01 16:00 -0700
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 15:08 -0800
      Re: Question about name scope Ian Kelly <ian.g.kelly@gmail.com> - 2012-02-01 16:47 -0700
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 14:53 -0800
        Re: Question about name scope Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-02 00:34 +0000
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 15:59 -0800
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 15:41 -0800
      Re: Question about name scope Ethan Furman <ethan@stoneleaf.us> - 2012-02-01 15:51 -0800
  Re: Question about name scope Chris Rebert <clp2@rebertia.com> - 2012-02-01 09:38 -0800
  Re: Question about name scope Christian Heimes <lists@cheimes.de> - 2012-02-01 18:50 +0100

csiph-web