Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.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 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'received:209.85.223': 0.03; 'attribute': 0.05; 'subject:file': 0.07; 'python': 0.09; 'abstraction': 0.09; 'assigning': 0.09; 'interpreter,': 0.09; 'to:addr:comp.lang.python': 0.09; 'underlying': 0.09; 'cc:addr :python-list': 0.10; 'programmer': 0.11; 'subject:python': 0.11; 'bounds': 0.16; 'subject:API': 0.16; 'trap': 0.16; 'pointer': 0.17; 'exceptions': 0.22; 'pos': 0.22; 'cc:2**0': 0.23; 'raise': 0.24; 'cc:no real name:2**0': 0.24; 'cc:addr:python.org': 0.25; 'header:In-Reply-To:1': 0.25; 'header:User-Agent:1': 0.26; 'actual': 0.28; 'file': 0.32; 'received:google.com': 0.34; 'received:209.85': 0.35; 'but': 0.36; 'possible': 0.37; 'beyond': 0.37; 'maintaining': 0.37; 'received:209': 0.37; 'subject:: ': 0.38; 'skip:" 10': 0.40; 'think': 0.40; 'your': 0.60; 'link': 0.60; 'between': 0.63; 'risk': 0.66 Newsgroups: comp.lang.python Date: Mon, 24 Sep 2012 15:36:20 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=71.39.56.98; posting-account=_mq9AwoAAADE_DU6vx1SR9Jw8c-yNCiv References: <0ec1fe2e-890c-4e25-8047-4cb8bee0aa95@googlegroups.com> <5060D55C.3000407@davea.name> User-Agent: G2/1.0 X-Google-Web-Client: true X-Google-IP: 71.39.56.98 MIME-Version: 1.0 Subject: Re: python file API From: zipher To: comp.lang.python@googlegroups.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: python-list@python.org 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: , Message-ID: Lines: 10 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1348526190 news.xs4all.nl 6850 [2001:888:2000:d::a6]:37132 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:29946 You raise a valid point: that by abstracting the file pointer into a positi= on attribute you risk "de-coupling" the conceptual link between the underly= ing file and your abstraction in the python interpreter, but I think the pr= ogrammer can take responsibility for maintaining the abstraction. =20 The key possible fault will be whether you can trap (OS-level) exceptions w= hen assigning to the pos attribute beyond the bounds of the actual file on = the system...=20 markj