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

Groups > comp.lang.python > #111272

Re: Curious Omission In New-Style Formats

Path csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From Ian Kelly <ian.g.kelly@gmail.com>
Newsgroups comp.lang.python
Subject Re: Curious Omission In New-Style Formats
Date Mon, 11 Jul 2016 09:04:22 -0600
Lines 30
Message-ID <mailman.180.1468249505.2295.python-list@python.org> (permalink)
References <834b1cce-38dd-474c-8915-4ff1cd6b27ec@googlegroups.com> <CALwzidmwcc0nTLtLBJm=JNAjOQNRe2umtmNXNAk=s+xoyxhU6Q@mail.gmail.com> <mailman.161.1468135349.2295.python-list@python.org> <7fcc8c21-106f-41d4-a5ba-409f3b54a56d@googlegroups.com> <CALwzidkiRh2+ttXewaQzyJhAKMjTb7AXYk=E2SxGyH_jw9o1gw@mail.gmail.com>
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
Content-Transfer-Encoding quoted-printable
X-Trace news.uni-berlin.de 2WxTEfi0dbmNWX/JGXtwjQ0MgAol0kU0IfNfl9b/zOMg==
Return-Path <ian.g.kelly@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.001
X-Spam-Evidence '*H*': 1.00; '*S*': 0.00; 'cc:addr:python-list': 0.09; 'formatted': 0.09; 'integers': 0.09; 'separately': 0.09; 'width.': 0.09; 'syntax': 0.13; 'result.': 0.15; '2016': 0.16; 'cc:name:python': 0.16; 'digits.': 0.16; 'formats,': 0.16; 'precision.': 0.16; 'printf-style': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'sense,': 0.16; 'url:linux': 0.16; 'wrote:': 0.16; 'example.': 0.18; 'integer': 0.18; '>>>': 0.20; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'lawrence': 0.22; 'sat,': 0.23; 'this:': 0.23; 'header:In-Reply-To:1': 0.24; "doesn't": 0.26; 'example': 0.26; 'sense': 0.26; 'message- id:@mail.gmail.com': 0.27; 'format,': 0.27; 'specify': 0.27; 'e.g.': 0.30; 'except': 0.34; 'received:google.com': 0.35; 'done': 0.35; 'but': 0.36; 'there': 0.36; 'url:org': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'really': 0.37; 'being': 0.37; 'wanted': 0.37; 'format': 0.39; 'does': 0.39; 'subject:-': 0.39; 'still': 0.40; 'field': 0.60; 'url:3': 0.60; 'your': 0.60; 'jul': 0.72; 'to:none': 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 :content-transfer-encoding; bh=rFAL3PUQHt/Pt2psON4CPN6GGGkAQYzuhyUO8j8rrv0=; b=eMiEe3Kc6GfzeUQ9JonemqBDvaYW336P3vm05zzUve2skw8UCWm1B0T39QA4R0X53u f7prNrxZqu2nEgJRCwAzDI9c8pVroXG1OSnBt3sw6DOlcuJMGtMQA/SOEwePpjiWAIQ5 zRt9dheMA+cnX5GJcMeLOk4rn58D0eF16JFIxArBr+FodueFbdvJW5+8cLqE/61AdPfY 3ZOB8ejFKnn/qgBu19KqiBN62oxpFYdrQBTO8W3fcJsBh66pR8/+K8o9f7J53Z5USWXS wWiYF6C8zI6DAgpDfelgnGWIfw1xPnK8e7uhBZ3GX5tJ/nilzsKFNDzwiSZB9nXfDMr5 OhUg==
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:content-transfer-encoding; bh=rFAL3PUQHt/Pt2psON4CPN6GGGkAQYzuhyUO8j8rrv0=; b=QHCUR+oqzAliwZqySEpeXFcrxffyqMWGwpaCKQsQ1eedM2ti6R41dLdiCne3LbBbW9 9OzKbvq9HwIcLacfVW/o+sCbYUqHA2fXFXb6a0hpQxylbbIw5Q260pEwh6JgRlUAXcyJ zYe+13xjNbX5MR6pKmyI06I/MTBL8HfpVs00sgkZSFFPVp+8qI33/CGeJuReU6k3gAJN D4ZtVJacdbgx6hUVOOcb4fBkpid3z7oG3sCQcR7CPkuMeY3FumCd0DIHgDLlcHghzwLZ dC/ys9J/P8DuWhAW4xBOSBGTPyP3E0IXd4v0zIx9mluFl6hxFCXakZp4pDI8CmYCin3k WsdA==
X-Gm-Message-State ALyK8tJt+qHdA0N79ED2Td/0gLIsnSylgyd2Sdmad0X/br36kKfxEdpZbH8w1wPUU5RsyMbAiMFctGvWPS4oSA==
X-Received by 10.202.225.212 with SMTP id y203mr9248238oig.47.1468249502511; Mon, 11 Jul 2016 08:05:02 -0700 (PDT)
In-Reply-To <7fcc8c21-106f-41d4-a5ba-409f3b54a56d@googlegroups.com>
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 <CALwzidkiRh2+ttXewaQzyJhAKMjTb7AXYk=E2SxGyH_jw9o1gw@mail.gmail.com>
X-Mailman-Original-References <834b1cce-38dd-474c-8915-4ff1cd6b27ec@googlegroups.com> <CALwzidmwcc0nTLtLBJm=JNAjOQNRe2umtmNXNAk=s+xoyxhU6Q@mail.gmail.com> <mailman.161.1468135349.2295.python-list@python.org> <7fcc8c21-106f-41d4-a5ba-409f3b54a56d@googlegroups.com>
Xref csiph.com comp.lang.python:111272

Show key headers only | View raw

On Sun, Jul 10, 2016 at 6:34 PM, Lawrence D’Oliveiro
<lawrencedo99@gmail.com> wrote:
> On Sunday, July 10, 2016 at 7:22:42 PM UTC+12, Ian wrote:
>> On Sat, Jul 9, 2016 at 11:54 PM, Lawrence D’Oliveiro wrote:
>>> In printf-style formats, you can specify the number of digits for an
>>> integer separately from the field width. E.g.
>>>
>>>     >>> "%#0.5x" % 0x123
>>>     '0x00123'
>>>
>> except perhaps that precision doesn't really make sense for integers
>> in the first place.
>
> Except that it does make sense, as I showed in my example.

Your example showed a 3-digit number being formatted with a requested
precision of 5 digits. The way this was done was by left-padding the
number with 0s until there were 5 digits, but still only 3 digits of
precision. If you truly wanted to format the number with a precision
of 5 digits, it would look like this:

    0x123.00

It may happen to do what you want in the printf-style format, but
calling the field "precision" is at best misleading, and there are
other ways to accomplish the same result.

> <http://man7.org/linux/man-pages/man3/printf.3.html>

Well, str.format does not use the same syntax as printf.

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

Thread

Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-09 22:54 -0700
  Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-10 01:21 -0600
    Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-10 17:34 -0700
      Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-11 09:04 -0600
        Re: Curious Omission In New-Style Formats Steven D'Aprano <steve@pearwood.info> - 2016-07-12 02:28 +1000
          Re: Curious Omission In New-Style Formats Ethan Furman <ethan@stoneleaf.us> - 2016-07-11 10:24 -0700
            Re: Curious Omission In New-Style Formats Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-12 11:47 +1200
              Re: Curious Omission In New-Style Formats Ethan Furman <ethan@stoneleaf.us> - 2016-07-11 17:24 -0700
              Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-11 19:16 -0600
          Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-11 12:38 -0600
            Re: Curious Omission In New-Style Formats Steven D'Aprano <steve@pearwood.info> - 2016-07-12 13:38 +1000
              Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-13 00:21 -0600
                Re: Curious Omission In New-Style Formats Marko Rauhamaa <marko@pacujo.net> - 2016-07-13 09:57 +0300
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-13 00:05 -0700
                Re: Curious Omission In New-Style Formats Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-13 18:49 +1000
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-13 16:01 +0200
                Re: Curious Omission In New-Style Formats Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-07-13 20:04 -0400
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-13 15:24 -0700
                Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-13 18:45 -0600
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-13 20:39 -0700
                Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-13 23:18 -0600
                Re: Curious Omission In New-Style Formats Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-14 17:47 +1000
                Re: Curious Omission In New-Style Formats Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-07-14 07:34 -0400
                Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-14 08:30 -0600
                Re: Curious Omission In New-Style Formats Marko Rauhamaa <marko@pacujo.net> - 2016-07-14 19:02 +0300
                Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-14 11:10 -0600
                Re: Curious Omission In New-Style Formats Marko Rauhamaa <marko@pacujo.net> - 2016-07-14 20:30 +0300
                Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-14 18:17 -0600
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-14 18:08 -0700
                Re: Curious Omission In New-Style Formats Marko Rauhamaa <marko@pacujo.net> - 2016-07-15 09:06 +0300
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 09:54 +0200
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-15 11:40 +0300
                Re: Curious Omission In New-Style Formats Steven D'Aprano <steve@pearwood.info> - 2016-07-15 20:56 +1000
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 13:44 +0200
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-15 16:38 +0300
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 16:47 +0200
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-15 16:13 +0300
                Re: Curious Omission In New-Style Formats Steven D'Aprano <steve@pearwood.info> - 2016-07-16 01:12 +1000
                Re: Curious Omission In New-Style Formats Random832 <random832@fastmail.com> - 2016-07-15 09:39 -0400
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 16:32 +0200
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 13:05 +0200
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-15 16:28 +0300
                Re: Curious Omission In New-Style Formats Steven D'Aprano <steve@pearwood.info> - 2016-07-16 01:13 +1000
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-15 18:27 +0300
                Re: Curious Omission In New-Style Formats Marko Rauhamaa <marko@pacujo.net> - 2016-07-15 12:20 +0300
                Re: Curious Omission In New-Style Formats Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-15 12:44 +0200
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-14 16:26 -0700
                Re: Curious Omission In New-Style Formats Robert Kern <robert.kern@gmail.com> - 2016-07-14 16:17 +0100
                Re: Curious Omission In New-Style Formats Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-15 16:35 -0700
                Re: Curious Omission In New-Style Formats Chris Angelico <rosuav@gmail.com> - 2016-07-16 10:57 +1000
                Re: Curious Omission In New-Style Formats MRAB <python@mrabarnett.plus.com> - 2016-07-14 01:59 +0100
              Re: Curious Omission In New-Style Formats Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-07-13 07:46 -0400
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-13 16:04 +0300
              Re: Curious Omission In New-Style Formats Chris Angelico <rosuav@gmail.com> - 2016-07-13 23:00 +1000
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-13 16:16 +0300
                Re: Curious Omission In New-Style Formats Chris Angelico <rosuav@gmail.com> - 2016-07-13 23:49 +1000
                Re: Curious Omission In New-Style Formats Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-07-13 17:23 +0300
                Re: Curious Omission In New-Style Formats Chris Angelico <rosuav@gmail.com> - 2016-07-14 00:28 +1000
          Re: Curious Omission In New-Style Formats Terry Reedy <tjreedy@udel.edu> - 2016-07-11 14:54 -0400
          Re: Curious Omission In New-Style Formats Ian Kelly <ian.g.kelly@gmail.com> - 2016-07-11 13:27 -0600
          Re: Curious Omission In New-Style Formats Michael Torrie <torriem@gmail.com> - 2016-07-11 14:06 -0600
          Re: Curious Omission In New-Style Formats Random832 <random832@fastmail.com> - 2016-07-11 16:34 -0400
          Re: Curious Omission In New-Style Formats Terry Reedy <tjreedy@udel.edu> - 2016-07-11 16:52 -0400
          What is precision of a number representation? (was: Curious Omission In New-Style Formats) Ben Finney <ben+python@benfinney.id.au> - 2016-07-12 06:56 +1000
            Re: What is precision of a number representation? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-11 23:28 +0100
          Re: What is precision of a number representation? Ethan Furman <ethan@stoneleaf.us> - 2016-07-11 14:22 -0700
          Re: What is precision of a number representation? (was: Curious Omission In New-Style Formats) Chris Angelico <rosuav@gmail.com> - 2016-07-12 07:51 +1000
            Re: What is precision of a number representation? (was: Curious Omission In New-Style Formats) Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2016-07-12 00:14 +0100
              Re: What is precision of a number representation? (was: Curious Omission In New-Style Formats) Chris Angelico <rosuav@gmail.com> - 2016-07-12 09:57 +1000
            Re: What is precision of a number representation? (was: Curious Omission In New-Style Formats) Steven D'Aprano <steve@pearwood.info> - 2016-07-12 14:19 +1000
              Re: What is precision of a number representation? (was: Curious Omission In New-Style Formats) Chris Angelico <rosuav@gmail.com> - 2016-07-12 14:36 +1000
              Re: What is precision of a number representation? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-12 11:50 +0200
                Re: What is precision of a number representation? Marko Rauhamaa <marko@pacujo.net> - 2016-07-12 13:27 +0300
                Re: What is precision of a number representation? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-07-12 13:02 +0200
                Re: What is precision of a number representation? Steven D'Aprano <steve@pearwood.info> - 2016-07-12 23:16 +1000
          Re: What is precision of a number representation? Ethan Furman <ethan@stoneleaf.us> - 2016-07-11 15:17 -0700
            Re: What is precision of a number representation? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-12 16:21 +1000
              Re: What is precision of a number representation? Random832 <random832@fastmail.com> - 2016-07-12 09:36 -0400
          Re: What is precision of a number representation? Ethan Furman <ethan@stoneleaf.us> - 2016-07-11 15:29 -0700
          Re: Curious Omission In New-Style Formats Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-12 11:26 +1200
          Re: What is precision of a number representation? Chris Angelico <rosuav@gmail.com> - 2016-07-12 11:57 +1000
          Re: What is precision of a number representation? Ben Finney <ben+python@benfinney.id.au> - 2016-07-12 13:41 +1000
          Re: What is precision of a number representation? Terry Reedy <tjreedy@udel.edu> - 2016-07-12 00:14 -0400
          Re: What is precision of a number representation? Terry Reedy <tjreedy@udel.edu> - 2016-07-12 00:17 -0400

csiph-web