Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!news.albasani.net!rt.uk.eu.org!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <rosuav@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.018
X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'attribute': 0.07; 'exception.': 0.09; 'try:': 0.09; 'cc:addr:python-list': 0.11; 'block.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'func': 0.16; 'subject:between': 0.16; 'throw': 0.16; 'exception': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'cc:addr:python.org': 0.22; 'cc:2**0': 0.24; 'header:In-Reply- To:1': 0.27; 'point': 0.28; 'dec': 0.30; 'message- id:@mail.gmail.com': 0.30; 'code': 0.31; '8:30': 0.31; 'except': 0.35; 'test': 0.35; 'received:google.com': 0.35; 'method': 0.36; 'pm,': 0.38; 'sure': 0.39; 'easy': 0.60; 'expression': 0.60; 'caused': 0.69; 'subject:skip:o 10': 0.84; 'to:none': 0.92; '2013': 0.98
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type:content-transfer-encoding; bh=8UKhJ9qgx1GC2dkzQHzPG0arypF9Y71ib46WRvxJhb8=; b=dlXGgaa/56FUZwfwoOSoVSn5TyXqfg6EE425ogbY933e/smgkKkABWnuVvbRi7zrjq N27+AI9KNlxP003b3SCRBB2rGsx6DMGoakecaH6nLWXMf3N4fm5m0+yKXrqw6QgQznqn dkiblyaWpfzZSEuRxhUJcbQuOnevFIvMUZkJfjFAW8praLgkrNS9ngGua9B+ZkEF33q6 medMLl2ovUILGukrQYEehwxnJWhAl0B/e8sT+7Nud6DwTTEcp/f+7tjXse3MADLJ7IeT JkjhglkYxNfYBoH4S7i6PeEErkZm/RqR9pjA2gZmudTttjX6WV2/pry6K6wyboz6izbK 3MiA==
MIME-Version: 1.0
X-Received: by 10.68.248.33 with SMTP id yj1mr472004pbc.45.1386754723453; Wed, 11 Dec 2013 01:38:43 -0800 (PST)
In-Reply-To: <l89bc2$cb1$1@ger.gmane.org>
References: <52A82101.7030307@galileo-press.de> <l89bc2$cb1$1@ger.gmane.org>
Date: Wed, 11 Dec 2013 20:38:43 +1100
Subject: Re: Differences between obj.attribute and getattr(obj, "attribute")
From: Chris Angelico <rosuav@gmail.com>
Cc: "python-list@python.org" <python-list@python.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.3876.1386754732.18130.python-list@python.org>
Lines: 20
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1386754732 news.xs4all.nl 2891 [2001:888:2000:d::a6]:46780
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:61538

On Wed, Dec 11, 2013 at 8:30 PM, Jurko Gospodneti=C4=87
<jurko.gospodnetic@pke.hr> wrote:
>   Also, you can not test whether an object has an attribute when using th=
e
> object.attribute access method without raising/catching an exception and
> then it can be hard to make sure no other code caused the exception.

It's pretty easy to make sure no other code caused the exception -
just have no other code inside the try block.

x.foo(input().split(" ")[4])  # Might throw from any point in the expressio=
n

try:
   func =3D x.foo
except AttributeError:
   deal_with_error
func(......)

ChrisA