Deutsch   English   Français   Italiano  
<mailman.140.1718420202.2909.python-list@python.org>

View for Bookmarking (what is this?)
Look up another Usenet article

Path: ...!npeer.as286.net!npeer-ng0.as286.net!fu-berlin.de!uni-berlin.de!not-for-mail
From: Cameron Simpson <cs@cskk.id.au>
Newsgroups: comp.lang.python
Subject: Re: Suggested python feature: allowing except in context maneger
Date: Sat, 15 Jun 2024 12:56:35 +1000
Lines: 17
Message-ID: <mailman.140.1718420202.2909.python-list@python.org>
References: <CAAtpb8n6C8RD527kNS3dp+DCjAWC5cPSWqSAiNXKy6oUhfvz4g@mail.gmail.com>
 <Zm0C4w3N7LeHX-_Q@cskk.homeip.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
X-Trace: news.uni-berlin.de y96Ff7+hKBmrKxnGE28+Cw+I9rgh4kkL/vbeF1BqZjNg==
Cancel-Lock: sha1:+qqOH7yNovmL4zBv3Ho+KTXBy+k= sha256:c0n+E3PMgmW5PENnyscU1kk8xJV0/a4LAIWYnUieCMY=
Return-Path: <cameron@cskk.id.au>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
Authentication-Results: mail.python.org; dkim=none reason="no signature";
 dkim-adsp=none (unprotected policy); dkim-atps=neutral
X-Spam-Status: OK 0.007
X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'usage': 0.05;
 'subject:python': 0.06; 'suggestion': 0.07; 'cc:addr:python-list':
 0.09; 'skip:` 10': 0.09; 'syntax': 0.15; '-1:': 0.16; 'applies':
 0.16; 'from:addr:cs': 0.16; 'from:addr:cskk.id.au': 0.16;
 'from:name:cameron simpson': 0.16; 'idiom': 0.16; 'indentation':
 0.16; 'message-id:@cskk.homeip.net': 0.16; 'received:13.237':
 0.16; 'received:13.237.201': 0.16; 'received:13.237.201.189':
 0.16; 'received:cskk.id.au': 0.16; 'received:id.au': 0.16;
 'received:mail.cskk.id.au': 0.16; 'wrote:': 0.16;
 'cc:addr:python.org': 0.20; "i've": 0.22; 'exception': 0.22;
 'cc:2**1': 0.23; 'lines': 0.23; 'behavior': 0.26; 'brings': 0.26;
 'header:User-Agent:1': 0.30; 'context': 0.32; "i'm": 0.33; 'header
 :In-Reply-To:1': 0.34; 'received:au': 0.35; 'change': 0.36;
 'really': 0.37; 'could': 0.38; 'changes': 0.39; 'provide': 0.60;
 'me.': 0.62; 'point.': 0.62; 'received:13': 0.64; 'your': 0.64;
 'benefit': 0.65; 'received:userid': 0.66; 'manager': 0.68;
 'managers': 0.70; 'near': 0.76; 'features.': 0.76; 'short,': 0.76;
 'db,': 0.84; 'tiny': 0.84
Mail-Followup-To: Yair Eshel <guruyaya@gmail.com>, dieter.maurer@online.de,
 python-list@python.org
Content-Disposition: inline
In-Reply-To: <CAAtpb8n6C8RD527kNS3dp+DCjAWC5cPSWqSAiNXKy6oUhfvz4g@mail.gmail.com>
User-Agent: Mutt/2.2.13 (2024-03-09)
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.39
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: <https://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>
X-Mailman-Original-Message-ID: <Zm0C4w3N7LeHX-_Q@cskk.homeip.net>
X-Mailman-Original-References: <CAAtpb8n6C8RD527kNS3dp+DCjAWC5cPSWqSAiNXKy6oUhfvz4g@mail.gmail.com>
Bytes: 4104

On 14Jun2024 09:07, Yair Eshel <guruyaya@gmail.com> wrote:
>Cameron, I'm not really sure I got your point. I've used the "file not
>found" exception as an example for a behavior typical on context managers.
>This could be a failure to connect to DB, or threads. It also applies to
>any kind of possible exception, whether cased by the context manager itself
>or the lines inside it. Long story short, this syntax change is as useful
>as context managers are

The example exception is not what bothers me. The syntax change is 
nowhere near as useful as `with` and context managers. They provide an 
excellent idiom for resource usage and release.

Your suggestion complicates the `with` statement and brings only a tiny 
indentation reduction over the `with`-inside-`try` idiom. It brings no 
semantic changes or new features.

That is why I'm -1: the benefit is triviailly small to my eye.