Re: Set a flag on the function or a global?

From	Ron Adam <ron3200@gmail.com>
Subject	Re: Set a flag on the function or a global?
Date	2015-06-15 20:24 -0400
References	<557f6676$0$21718$c3e8da3@news.astraweb.com> <CAPTjJmr9r7Ev2Dw3+fY=mzOF3dz5TaXWX07TFH9R0u7JVxrzCg@mail.gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.492.1434414286.13271.python-list@python.org> (permalink)

Show all headers | View raw


On 06/15/2015 08:07 PM, Chris Angelico wrote:
> On Tue, Jun 16, 2015 at 9:57 AM, Steven D'Aprano
> <steve+comp.lang.python@pearwood.info>  wrote:
>> >I have two ideas for this, a module-level global, or a flag set on the
>> >function object itself. Remember that the usual way of using this will be
>> >"from module import edir", there are two obvious ways to set the global:
>> >
>> >import module
>> >module.dunders = False
>> >
>> ># -or-
>> >
>> >edir.__globals__['dunders'] = False
>> >
>> >
>> >Alternatively, I can use a flag set on the function object itself:
>> >
>> >edir.dunders = False
>> >
> For most situations, the last one is extremely surprising - attributes
> on functions aren't normally meant to be changed by outside callers,

Or inside callers either.  You can't be sure of the name and there is no self.


> it always feels wrong (they belong to the function itself). But since
> this is interactive, I'd advise going for the absolute simplest, which
> this would be. Go for the function attribute IMO.


Another way is to make it an object with a __call__ method.

The the attribute can be accessed from both outside and inside dependably.

Cheers,
    Ron

Thread

Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-15 23:57 +0000
  Re: Set a flag on the function or a global? Chris Angelico <rosuav@gmail.com> - 2015-06-16 10:07 +1000
  Re: Set a flag on the function or a global? Ethan Furman <ethan@stoneleaf.us> - 2015-06-15 17:19 -0700
  Re: Set a flag on the function or a global? Ben Finney <ben+python@benfinney.id.au> - 2015-06-16 10:20 +1000
    Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 19:07 +1000
  Re: Set a flag on the function or a global? Ethan Furman <ethan@stoneleaf.us> - 2015-06-15 17:21 -0700
  Re: Set a flag on the function or a global? sohcahtoa82@gmail.com - 2015-06-15 17:24 -0700
    Re: Set a flag on the function or a global? MRAB <python@mrabarnett.plus.com> - 2015-06-16 01:35 +0100
      Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 18:18 +1000
        Re: Set a flag on the function or a global? Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2015-06-16 13:45 +0100
          Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 22:46 +0000
        Re: Set a flag on the function or a global? Cameron Simpson <cs@zip.com.au> - 2015-06-17 09:51 +1000
          Re: Set a flag on the function or a global? Steven D'Aprano <steve@pearwood.info> - 2015-06-18 00:59 +1000
            Re: Set a flag on the function or a global? Laura Creighton <lac@openend.se> - 2015-06-17 17:06 +0200
              Re: Set a flag on the function or a global? Steven D'Aprano <steve@pearwood.info> - 2015-06-18 01:55 +1000
                Documenting a function signature (was: Set a flag on the function or a global?) Ben Finney <ben+python@benfinney.id.au> - 2015-06-18 10:04 +1000
                Re: Documenting a function signature (was: Set a flag on the function or a global?) Ian Kelly <ian.g.kelly@gmail.com> - 2015-06-17 18:10 -0600
                Re: Documenting a function signature (was: Set a flag on the function or a global?) Chris Angelico <rosuav@gmail.com> - 2015-06-18 10:14 +1000
                Re: Documenting a function signature (was: Set a flag on the function or a global?) random832@fastmail.us - 2015-06-18 08:37 -0400
                Re: Documenting a function signature (was: Set a flag on the function or a global?) Laura Creighton <lac@openend.se> - 2015-06-18 23:38 +0200
                Re: Documenting a function signature Ben Finney <ben+python@benfinney.id.au> - 2015-06-19 10:41 +1000
  Re: Set a flag on the function or a global? Ron Adam <ron3200@gmail.com> - 2015-06-15 20:24 -0400
    Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 19:15 +1000
      Re: Set a flag on the function or a global? Ron Adam <ron3200@gmail.com> - 2015-06-16 07:02 -0400
  Re: Set a flag on the function or a global? Chris Angelico <rosuav@gmail.com> - 2015-06-16 10:32 +1000
  Re: Set a flag on the function or a global? Paul Rubin <no.email@nospam.invalid> - 2015-06-15 17:37 -0700
    Re: Set a flag on the function or a global? Ethan Furman <ethan@stoneleaf.us> - 2015-06-15 17:53 -0700
      Re: Set a flag on the function or a global? Paul Rubin <no.email@nospam.invalid> - 2015-06-15 19:04 -0700
    Re: Set a flag on the function or a global? MRAB <python@mrabarnett.plus.com> - 2015-06-16 02:15 +0100
    Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 18:30 +1000
  Re: Set a flag on the function or a global? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-06-16 07:06 +0100
    Re: Set a flag on the function or a global? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-16 19:28 +1000
  Re: Set a flag on the function or a global? Jonas Wielicki <jonas@wielicki.name> - 2015-06-16 12:00 +0200
  Re: Set a flag on the function or a global? Michael Torrie <torriem@gmail.com> - 2015-06-16 07:44 -0600
  Re: Set a flag on the function or a global? Michael Torrie <torriem@gmail.com> - 2015-06-16 07:56 -0600
  Re: Set a flag on the function or a global? Peter Otten <__peter__@web.de> - 2015-06-16 15:59 +0200
  Re: Set a flag on the function or a global? Ethan Furman <ethan@stoneleaf.us> - 2015-06-16 07:57 -0700

csiph-web