Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'defaults': 0.05; 'used.': 0.05; 'allowed.': 0.07; 'deprecated': 0.07; 'desirable.': 0.07; '__init__': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'subject:module': 0.09; 'defaults.': 0.16; 'feasible': 0.16; 'itself;': 0.16; 'reason).': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; "someone's": 0.16; 'subject:instance': 0.16; 'wrote:': 0.16; 'string,': 0.18; 'fairly': 0.22; 'module': 0.23; 'import': 0.24; 'seems': 0.24; 'header:In-Reply-To:1': 0.24; 'all.': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; 'define': 0.27; 'defining': 0.27; 'object,': 0.27; "i'm": 0.29; 'reset': 0.29; 'correct': 0.29; 'probably': 0.32; 'common': 0.33; 'running': 0.34; 'could': 0.35; 'to:addr:python-list': 0.35; 'ahead': 0.35; 'really': 0.35; 'problem.': 0.35; 'but': 0.36; 'being': 0.36; 'subject:: ': 0.37; 'received:org': 0.38; 'wanted': 0.39; 'things': 0.39; 'enough': 0.39; 'to:addr:python.org': 0.39; 'sure': 0.40; 'why': 0.40; 'even': 0.61; 'default': 0.61; 'more': 0.62; 'making': 0.64; 'situation': 0.67; 'special': 0.72; 'hoping': 0.73; 'received:109': 0.75; '..........': 0.84; 'becker': 0.84; 'bitten': 0.84; 'correctly?': 0.84; 'otten': 0.84; 'scatter': 0.84; 'processes,': 0.93 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Robin Becker Subject: Re: instance as module Date: Fri, 19 Jun 2015 12:07:34 +0100 References: <5583E0EA.2090309@chamonix.reportlab.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: 109.174.168.73 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; 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: 37 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1434712068 news.xs4all.nl 2935 [2001:888:2000:d::a6]:34457 X-Complaints-To: abuse@xs4all.nl Path: csiph.com!usenet.pasdenom.info!news.stben.net!border1.nntp.ams1.giganews.com!nntp.giganews.com!newsfeed.xs4all.nl!newsfeed7.news.xs4all.nl!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Xref: csiph.com comp.lang.python:92878 On 19/06/2015 11:23, Peter Otten wrote: > Robin Becker wrote: ......... > > Do I understand this correctly? You got bitten by a complex setup and now > you are hoping to improve the situation by making it even more complex? > > How about reordering initialisation in such a way that the user defaults are > the last thing being set? > I don't think re-ordering is feasible or desirable. For the specific case of the canvas_basefontname I don't actually need to do anything specific since it is just a string, however, before it can be used in action support has to be provided ie I must register the font used. I could just make the few usages of this value check for callability at use time, but that would scatter the problem; if one default is special why not all. Effectively the defaults setup is not complex enough to allow use of itself; that must be a fairly common problem. Probably the correct thing to do was always to use an object to hold the defaults. For a long time a module satisfied, then people wanted long running processes, reset etc etc now they want to define things ahead of time (probably for good reason). I could just move the rl_config module into reportlab's __init__ as an object, but I'm almost sure that would break someone's from reportlab.rl_config import * which although deprecated is still allowed. Defining a module like object seems a reasonable way out if I really need it. -- Robin Becker