Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #109575

Re: Operator precedence problem

Path csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Subject Re: Operator precedence problem
Date Tue, 7 Jun 2016 01:57:34 +1000
Lines 23
Message-ID <mailman.40.1465228656.2306.python-list@python.org> (permalink)
References <816c651a-d0ae-4e23-a5b2-72a8f7398468@googlegroups.com> <nj0kol$ps$1@ger.gmane.org> <mailman.5.1465112166.2306.python-list@python.org> <3ff71354-461a-4635-8d1a-c879243e39a8@googlegroups.com> <CAMQ2MsFfxF0wSL_y9tSFCoJ1BJ+GVqi2qJLTBzs7+BbGRjW3Bw@mail.gmail.com> <mailman.9.1465142763.2306.python-list@python.org> <2a577a90-3a39-4d8f-90fa-4a00fd4f06a3@googlegroups.com> <1465221421.1069788.629246361.60094337@webmail.messagingengine.com> <mailman.37.1465221424.2306.python-list@python.org> <87inxmmm67.fsf@elektro.pacujo.net> <slrnnlb459.6f8.jon+usenet@sable.unequivocal.co.uk> <87a8iymjel.fsf@elektro.pacujo.net> <slrnnlb5jj.6f8.jon+usenet@sable.unequivocal.co.uk> <CAPTjJmq7vkfZmNndbJn-azX+c8KwjW3uZCzprYdcYU+aM8Ec9A@mail.gmail.com>
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
X-Trace news.uni-berlin.de P+jPHXNy/KHjUTi5xmplVgH2RWm5u4BTejrmJPQilagA==
Return-Path <rosuav@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.014
X-Spam-Evidence '*H*': 0.97; '*S*': 0.00; 'expressions': 0.07; 'interpreted': 0.07; 'cc:addr:python-list': 0.09; 'brackets': 0.09; 'received:74.125.82.44': 0.15; 'interpreter': 0.15; '2016': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'parentheses:': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'suppose.': 0.16; 'wrote:': 0.16; '>>>': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; "aren't": 0.22; 'subject:problem': 0.22; 'am,': 0.23; 'bit': 0.23; 'header:In- Reply-To:1': 0.24; 'figure': 0.27; 'message-id:@mail.gmail.com': 0.27; 'sensible': 0.29; 'comments': 0.30; 'code': 0.30; 'case,': 0.34; 'tue,': 0.34; 'received:google.com': 0.35; 'could': 0.35; 'something': 0.35; 'received:74.125.82': 0.35; 'should': 0.36; 'there': 0.36; 'subject:: ': 0.37; 'future': 0.60; 'your': 0.60; 'is.': 0.63; 'readers': 0.66; 'here': 0.66; '"active': 0.84; 'chrisa': 0.84; 'unclear': 0.84; 'to:none': 0.91; 'beneficial': 0.91
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:cc; bh=qEpKqhAwfh9smAN93Y/mcplHuZ/dzn5WOY9VhggiWng=; b=p5Ioyt3VW8YP4EACmpPkbL/5VR6zZWkt4N7GETy3/UIgAc6iKNz7aMJiXoW1XaspC5 kg52S36/GmwbLRjWU0gQm0Es3QicnXjIFSUr1Z2lPOPH4wQgcht/Qblmly044lHoasp1 6kuV0XDNf0dZwNtzUIONCFi5w8xrl+rtgVRN/fTJXrfbbgr5lvif7D0YL7njbV1WXkUo J/UCoiut9Vct/gHJuavbnB85uSwVR8XmMPV/f58umBqNRGSLsqDjEy8XmR5y44sw3yTi Ck8Gq9+PVX0qbWbV/vcXJo7L++rE6esWBDd7twk01vnUuRztaQl0PhrPI/Ccl7CfbWaE teTg==
X-Google-DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:cc; bh=qEpKqhAwfh9smAN93Y/mcplHuZ/dzn5WOY9VhggiWng=; b=fT0MX+UwwxdPEEGOwFTd3erRNNyLhRh9OHeg+9HY8qlwBZ8A7HwkxCzRGY/H7rd6eF GZpiZcrBa3YeF9TQopDfDDjdYl+ZSXNBQA3qvbKvAeTNZqrSCazdHr8PCsQYb0haIqUx 5vB3Vcm4YBa95gwPBlsYLeXLizIMKmISeEFjlx9ZmwFYfc7EeX7/rSB76FIdIufvEmBC B1/C0rigeoQVWLbutgOtz4D2F68J5m/lIB6GPxkskNAn1CiurrWbIiHvFvXnTJiF76qM v9RphDsq+mhfqwQlvUn7EjhhZAAsUirbbGy2qKffYr0FMxX6bQq5NjxqvimVWsoxqggU mONA==
X-Gm-Message-State ALyK8tL+eUrN6Jlh82Wuz0YesmrVND/0YmCcjoSb07LzGhS56Cz1/K0XxH04dkuN8LL9RxrEMwJ2H3fFfAhOuA==
X-Received by 10.194.80.42 with SMTP id o10mr16019951wjx.117.1465228654829; Mon, 06 Jun 2016 08:57:34 -0700 (PDT)
In-Reply-To <slrnnlb5jj.6f8.jon+usenet@sable.unequivocal.co.uk>
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.22
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>
X-Mailman-Original-Message-ID <CAPTjJmq7vkfZmNndbJn-azX+c8KwjW3uZCzprYdcYU+aM8Ec9A@mail.gmail.com>
X-Mailman-Original-References <816c651a-d0ae-4e23-a5b2-72a8f7398468@googlegroups.com> <nj0kol$ps$1@ger.gmane.org> <mailman.5.1465112166.2306.python-list@python.org> <3ff71354-461a-4635-8d1a-c879243e39a8@googlegroups.com> <CAMQ2MsFfxF0wSL_y9tSFCoJ1BJ+GVqi2qJLTBzs7+BbGRjW3Bw@mail.gmail.com> <mailman.9.1465142763.2306.python-list@python.org> <2a577a90-3a39-4d8f-90fa-4a00fd4f06a3@googlegroups.com> <1465221421.1069788.629246361.60094337@webmail.messagingengine.com> <mailman.37.1465221424.2306.python-list@python.org> <87inxmmm67.fsf@elektro.pacujo.net> <slrnnlb459.6f8.jon+usenet@sable.unequivocal.co.uk> <87a8iymjel.fsf@elektro.pacujo.net> <slrnnlb5jj.6f8.jon+usenet@sable.unequivocal.co.uk>
Xref csiph.com comp.lang.python:109575

Show key headers only | View raw

On Tue, Jun 7, 2016 at 1:27 AM, Jon Ribbens
<jon+usenet@unequivocal.co.uk> wrote:
>>> You should put brackets around expressions when it's at all unclear
>>> what the meaning is. You could think of them a bit like "active
>>> comments" I suppose.
>>
>> Your code should keep noise to the minimum.
>
> Sensible and beneficial comments aren't "noise".

In that case, please never insult the intelligence of your future
readers by including any of these parentheses:

x = 1 + (2 * 3)
value = 77 if (x % 2) else (70*7)

And if your readers have to figure out what 3**3**3 is interpreted as,
there should be an interactive interpreter around. Or here - try
something cute:

>>> 2**2**-1

ChrisA

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Operator precedence problem ICT Ezy <ictezy@gmail.com> - 2016-06-04 23:53 -0700
  Re: Operator precedence problem Peter Otten <__peter__@web.de> - 2016-06-05 09:35 +0200
    Re: Operator precedence problem ICT Ezy <ictezy@gmail.com> - 2016-06-05 08:05 -0700
      Re: Operator precedence problem Uri Even-Chen <uri@speedy.net> - 2016-06-05 19:05 +0300
        Re: Operator precedence problem ICT Ezy <ictezy@gmail.com> - 2016-06-05 20:24 -0700
        Re: Operator precedence problem Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-05 22:46 -0700
          Re: Operator precedence problem Random832 <random832@fastmail.com> - 2016-06-06 09:57 -0400
            Re: Operator precedence problem Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 17:22 +0300
              Re: Operator precedence problem Random832 <random832@fastmail.com> - 2016-06-06 10:35 -0400
                Re: Operator precedence problem Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 17:55 +0300
              Re: Operator precedence problem Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2016-06-06 15:03 +0000
                Re: Operator precedence problem Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 18:22 +0300
                Re: Operator precedence problem Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2016-06-06 15:27 +0000
                Re: Operator precedence problem Chris Angelico <rosuav@gmail.com> - 2016-06-07 01:57 +1000
                Re: Operator precedence problem Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2016-06-06 16:05 +0000
                Re: Operator precedence problem Chris Angelico <rosuav@gmail.com> - 2016-06-07 02:21 +1000
                Re: Operator precedence problem Jon Ribbens <jon+usenet@unequivocal.co.uk> - 2016-06-06 17:02 +0000
                Re: Operator precedence problem Grant Edwards <grant.b.edwards@gmail.com> - 2016-06-06 16:51 +0000
              Re: Operator precedence problem Peter Otten <__peter__@web.de> - 2016-06-06 18:38 +0200
            Re: Operator precedence problem Steven D'Aprano <steve@pearwood.info> - 2016-06-07 03:07 +1000
              Re: Operator precedence problem Random832 <random832@fastmail.com> - 2016-06-06 14:44 -0400
                Re: Operator precedence problem Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 21:49 +0300
              Re: Operator precedence problem MRAB <python@mrabarnett.plus.com> - 2016-06-06 20:17 +0100
                Re: Operator precedence problem Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 11:27 +1200
            Re: Operator precedence problem Rustom Mody <rustompmody@gmail.com> - 2016-06-06 10:14 -0700
              Re: Operator precedence problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-06-06 21:09 +0100
      Re: Operator precedence problem Michael Torrie <torriem@gmail.com> - 2016-06-05 17:47 -0600
        Re: Operator precedence problem ICT Ezy <ictezy@gmail.com> - 2016-06-05 20:23 -0700
  Re: Operator precedence problem Chris Angelico <rosuav@gmail.com> - 2016-06-06 02:24 +1000
    Re: Operator precedence problem Peter Pearson <pkpearson@nowhere.invalid> - 2016-06-06 16:58 +0000
      Re: Operator precedence problem Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 11:21 +1200
  Re: Operator precedence problem Random832 <random832@fastmail.com> - 2016-06-05 13:19 -0400
    Re: Operator precedence problem ICT Ezy <ictezy@gmail.com> - 2016-06-05 20:23 -0700
  Re: Operator precedence problem Gary Herron <gherron@digipen.edu> - 2016-06-05 00:04 -0700

csiph-web