Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.002 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; '16,': 0.03; 'method.': 0.05; 'attributes': 0.07; 'global,': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'itself.': 0.11; 'imo.': 0.16; 'interactive,': 0.16; 'itself).': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'skip:> 20': 0.16; 'surprising': 0.16; 'wrote:': 0.16; 'attribute': 0.18; 'meant': 0.22; "aren't": 0.22; 'either.': 0.22; 'ron': 0.22; 'am,': 0.23; '2015': 0.23; 'module': 0.23; 'absolute': 0.23; 'normally': 0.23; 'cheers,': 0.24; 'import': 0.24; 'header:In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'chris': 0.26; 'function': 0.30; "i'd": 0.31; "can't": 0.32; 'belong': 0.33; "d'aprano": 0.33; 'steven': 0.33; 'another': 0.34; 'subject:?': 0.34; 'changed': 0.35; 'wrong': 0.35; 'to:addr :python-list': 0.35; 'false': 0.35; 'skip:> 10': 0.35; 'but': 0.36; 'there': 0.36; 'two': 0.37; 'subject:: ': 0.37; 'tue,': 0.38; 'received:org': 0.38; 'pm,': 0.39; 'to:addr:python.org': 0.39; 'sure': 0.40; 'subject:the': 0.40; 'accessed': 0.66; 'header :Reply-To:1': 0.67; 'reply-to:no real name:2**0': 0.71; 'obvious': 0.72; 'reply-to:addr:gmail.com': 0.77; '(they': 0.84; '>function': 0.84; '__call__': 0.84; 'subject:Set': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Ron Adam Subject: Re: Set a flag on the function or a global? Date: Mon, 15 Jun 2015 20:24:34 -0400 References: <557f6676$0$21718$c3e8da3@news.astraweb.com> Reply-To: ron3200@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: ip98-170-222-146.pn.at.cox.net User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 39 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1434414286 news.xs4all.nl 2902 [2001:888:2000:d::a6]:57718 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:92650 On 06/15/2015 08:07 PM, Chris Angelico wrote: > On Tue, Jun 16, 2015 at 9:57 AM, Steven D'Aprano > 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