Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!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 0.005 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'subject:test': 0.05; 'attribute': 0.07; 'reason.': 0.07; 'am,': 0.12; 'exception': 0.12; 'library': 0.13; 'case.': 0.15; 'entries': 0.15; "'title'": 0.16; 'attribute?': 0.16; 'clause,': 0.16; 'feedparser': 0.16; 'title.': 0.16; 'cc:addr:python-list': 0.16; 'wrote:': 0.18; 'exists': 0.18; 'cc:no real name:2**0': 0.20; 'cheers,': 0.20; 'dec': 0.22; 'header:In-Reply-To:1': 0.22; 'feeds': 0.23; 'cc:2**0': 0.24; 'function': 0.27; 'received:209.85.220': 0.27; 'skip:" 30': 0.28; 'message-id:@mail.gmail.com': 0.28; 'cc:addr:python.org': 0.29; 'seem': 0.30; 'bare': 0.30; 'chris': 0.30; 'hi,': 0.32; 'thu,': 0.32; "won't": 0.33; 'there': 0.33; 'object': 0.33; 'test': 0.35; 'unless': 0.35; 'but': 0.37; 'received:google.com': 0.37; 'doing': 0.38; 'using': 0.38; 'some': 0.38; 'received:209.85': 0.38; 'subject:how': 0.39; 'received:209': 0.40; 'difference': 0.40; '2011': 0.61; 'below': 0.63; 'mention.': 0.84; 'sender:addr:chris': 0.84; 'url:rebertia': 0.84; 'skip:d 50': 0.93 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rebertia.com; s=google; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=HqAuLu49qbod2EuNT/wPPLehv7rw1EZq1ZNS989DIVo=; b=Qrg54aM77EYX9tu9Elnzl8MndHdCn+lrVOpSaWK8jdW1YHCP7XJD7eSk9TBOx/reb8 Y4sRt/BFBXeIklqq2nxywUib+nrp0O93/nWXEJ8qpGSKf3ONpW1PUrlO5HFc0zfEu8GB 9YAMc0ER+qK03s99dMdS+sEs4+NOtjxi7jX1c= MIME-Version: 1.0 Sender: chris@rebertia.com In-Reply-To: <2e457709-b40a-4763-8a3b-0e0560e98ee1@n10g2000vbg.googlegroups.com> References: <2e457709-b40a-4763-8a3b-0e0560e98ee1@n10g2000vbg.googlegroups.com> Date: Thu, 8 Dec 2011 02:24:30 -0800 X-Google-Sender-Auth: r9OWTktfVxC-I_52RShcO8CZGQg Subject: Re: how to test attribute existence of feedparser objects From: Chris Rebert To: HansPeter Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: python-list@python.org X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 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: 29 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1323339874 news.xs4all.nl 6985 [2001:888:2000:d::a6]:34367 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:16816 On Thu, Dec 8, 2011 at 1:34 AM, HansPeter wrote= : > Hi, > > While using the feedparser library for downloading RSS feeds some of > the blog entries seem to have no title. > > =C2=A0File "build\bdist.win32\egg\feedparser.py", line 382, in __getattr_= _ > AttributeError: object has no attribute 'title' > > Is there a way to test the existence of an attribute? > > I can use an exception but like below to see whether it exists but > this is a clumsy way since the function has to return the title. hasattr(obj, attr_name) See docs.python.org/dev/library/functions.html#hasattr That said, sounds like it won't make much difference in the particular case you mention. Also, never use a bare "except:" clause, unless you know what you're doing and have a really good reason. Do "except AttributeError" in this case. Cheers, Chris -- http://rebertia.com