Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!news2.euro.net!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 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'parser': 0.07; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'tmp': 0.09; 'subject:question': 0.10; '(defined': 0.16; 'library).': 0.16; 'objection': 0.16; 'pythonic': 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'subject:class': 0.16; '{})': 0.16; 'wrote:': 0.18; 'module': 0.19; 'header:User- Agent:1': 0.23; 'this:': 0.26; 'pass': 0.26; 'header:X-Complaints- To:1': 0.27; 'external': 0.29; 'tim': 0.29; 'lines': 0.31; 'that.': 0.31; 'bunch': 0.31; 'extending': 0.31; 'way?': 0.31; 'class': 0.32; 'classes': 0.35; 'created': 0.35; 'something': 0.35; 'but': 0.35; 'there': 0.35; 'same.': 0.38; 'to:addr:python- list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'name': 0.63; 'more': 0.64; 'behavior': 0.77 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Peter Otten <__peter__@web.de> Subject: Re: class factory question Date: Wed, 26 Jun 2013 15:39:12 +0200 Organization: None References: <138ce5a8-1b4c-49d4-8005-d5f4642dcb97@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Gmane-NNTP-Posting-Host: p5084bcc8.dip0.t-ipconnect.de User-Agent: KNode/4.7.3 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 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: 27 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1372253972 news.xs4all.nl 15909 [2001:888:2000:d::a6]:56789 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:49256 Tim wrote: > I am extending a parser and need to create many classes that are all > subclassed from the same object (defined in an external library). When my > module is loaded I need all the classes to be created with a particular > name but the behavior is all the same. Currently I have a bunch of lines > like this: > > class Vspace(Base.Command): pass > class Boldpath(Base.Command): pass > > There are a bunch of lines like that. > Is there a better way? Something like > > newclasses = ['Vspace', 'Boldpath', ... ] > for name in newclasses: > tmp = type(name, (Base.Command,) {}) > tmp.__name__ = name > > Is there a more pythonic way? What is your objection against that approach? By the way, I don't think you need > tmp.__name__ = name