Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed1.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 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'calls.': 0.07; 'override': 0.07; 'enhancements': 0.09; 'global,': 0.09; 'naturally': 0.09; 'script,': 0.09; 'specifying': 0.09; 'itself.': 0.11; 'argument': 0.15; 'explicitly': 0.15; 'importing': 0.15; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'imo.': 0.16; 'message- id:@mrabarnett.plus.com': 0.16; 'received:192.168.1.4': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'wrote:': 0.16; 'thoughts': 0.18; 'meant': 0.22; '2015': 0.23; 'module': 0.23; 'split': 0.23; 'import': 0.24; 'header:In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; 'not.': 0.27; 'methods.': 0.29; 'read,': 0.29; 'function': 0.30; '15,': 0.31; 'keyword': 0.31; 'received:84': 0.32; "d'aprano": 0.33; 'enhanced': 0.33; 'steven': 0.33; 'subject:?': 0.34; 'could': 0.35; 'to:addr:python-list': 0.35; 'false': 0.35; 'filter': 0.35; 'but': 0.36; 'there': 0.36; 'monday,': 0.36; 'two': 0.37; 'should': 0.37; 'setting': 0.37; 'subject:: ': 0.37; 'monitor': 0.38; 'rather': 0.38; 'version': 0.38; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'skip:e 20': 0.39; 'subject:the': 0.40; 'some': 0.40; 'easy': 0.60; 'back': 0.61; 'default': 0.61; 'email addr:gmail.com': 0.64; 'believe': 0.67; 'obvious': 0.72; 'alone,': 0.84; "they'd": 0.84; 'utc-7,': 0.84; 'subject:Set': 0.91; 'not:': 0.93 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.1 cv=OoyysHLt c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=0Bzu9jTXAAAA:8 a=QrohdLjRRo4A:10 a=IkcTkHD0fZMA:10 a=EBOSESyhAAAA:8 a=pGLkceISAAAA:8 a=3xKUVqDsPsIA0J8MfvgA:9 a=QEXdDO2ut3YA:10 X-AUTH: mrabarnett@:2500 Date: Tue, 16 Jun 2015 01:35:59 +0100 From: MRAB User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Set a flag on the function or a global? References: <557f6676$0$21718$c3e8da3@news.astraweb.com> <4449bc52-4dba-486c-b426-7095e228a316@googlegroups.com> In-Reply-To: <4449bc52-4dba-486c-b426-7095e228a316@googlegroups.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit 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: 54 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1434414969 news.xs4all.nl 2842 [2001:888:2000:d::a6]:40137 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:92652 On 2015-06-16 01:24, sohcahtoa82@gmail.com wrote: > On Monday, June 15, 2015 at 4:57:53 PM UTC-7, Steven D'Aprano wrote: >> I have a function in a module which is intended to be used by >> importing that name alone, then used interactively: >> >> from module import edir edir(args) >> >> >> edir is an enhanced version of dir, and one of the enhancements is >> that you can filter out dunder methods. I have reason to believe >> that people are split on their opinion on whether dunder methods >> should be shown by default or not: some people want to see them, >> others do not. Since edir is meant to be used interactively, I want >> to give people a setting to control whether they get dunders by >> default or not. >> >> 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 >> >> >> Naturally you can always override the default by explicitly >> specifying a keyword argument edir(obj, dunders=flag). >> >> Thoughts and feedback? Please vote: a module global, or a flag on >> the object? Please give reasons, and remember that the function is >> intended for interactive use. >> >> >> -- Steven D'Aprano > > Using a keyword argument for the edir function is the most intuitive > and easy to read, IMO. > > Also, if two people are working on the same script, it could create > problems if one person wants to filter them, but the other doesn't. > That would create a state that they would both have to monitor and > keep setting back and forth, rather than each one just setting an > argument on their calls. > But it's meant to be used interactively. If they're using it in a script, they'd most likely set the argument appropriately.