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

Groups > comp.lang.python > #98791

Re: Problems using struct pack/unpack in files, and reading them.

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: Problems using struct pack/unpack in files, and reading them.
Date Fri, 13 Nov 2015 20:48:50 -0700
Lines 27
Message-ID <mailman.317.1447472938.16136.python-list@python.org> (permalink)
References <20151113192045.GA9913@z-sverige.nu> <CALwzidknLk3w8NWJqhYXjCFy4uBm79dxhBn=oaXCtxfJu-d-_g@mail.gmail.com> <mailman.310.1447454532.16136.python-list@python.org> <56469f14$0$1612$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmoAGfTM6NWS4=FyRMdOUnOzFXnTbnHraFjngxuCFdMUew@mail.gmail.com>
Mime-Version 1.0
Content-Type text/plain; charset=UTF-8
X-Trace news.uni-berlin.de FWT2p2flmofnfk0LS2f8EA4tfJPefav8296RxIqyPY9A==
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 0.009
X-Spam-Evidence '*H*': 0.98; '*S*': 0.00; 'assignment': 0.07; 'augmented': 0.09; 'minus': 0.09; 'subject:files': 0.09; 'subject:using': 0.09; 'python': 0.10; '(but': 0.15; 'argument': 0.15; '"force': 0.16; 'operators.': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'subject:Problems': 0.16; 'unary': 0.16; 'wrote:': 0.16; '&gt;': 0.18; 'email addr:gmail.com&gt;': 0.18; 'python?': 0.18; '2015': 0.20; 'meant': 0.22; 'am,': 0.23; 'sat,': 0.23; 'header:In-Reply-To:1': 0.24; 'chris': 0.26; 'message- id:@mail.gmail.com': 0.27; '14,': 0.27; '13,': 0.29; 'btw,': 0.29; "i'm": 0.30; 'subject:/': 0.30; "d'aprano": 0.33; 'steven': 0.33; 'skip:& 20': 0.35; 'received:google.com': 0.35; 'could': 0.35; 'nov': 0.35; 'but': 0.36; 'received:209.85': 0.36; 'to:addr :python-list': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'really': 0.37; 'received:209.85.213': 0.37; 'received:209': 0.38; 'means': 0.39; 'sure': 0.39; 'rather': 0.39; 'to:addr:python.org': 0.40; "you'll": 0.61; 'skip:n 10': 0.62; 'is.': 0.63; 'more': 0.63; 'manner': 0.69; 'hands.': 0.84; 'subject:pack': 0.84; 'to:name:python': 0.84; 'careful': 0.91
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:to :content-type; bh=bJxZJnp5r2dCPC0BDyS0kLcpQdQzTzsc2gUGxdnpUR0=; b=xT1S8dPQFBDdNAZixH1TDHZ2BXWT9rb2yr2H18TBjcx95nf9ReUmULdUMIR/Lryj82 Zmp7hsvXRsOu5sW/1zso2Q2Akyp7pF3rl5rQ+/LpzCqF2CqlbgldKUUtdERlgl4ujYF2 mOcFctMgjTnPvIWKuJ8h9wAtoP9DQ5S38g5V0E3aqMWqM/VnqKqyGeZRcMQ+etJZgWEp 1tYPlO6BmSq/WRRcNxgrHt0jaVYof7/e6myBifOXIpUHXq22xUl9eEHs3D6bCjAH3F3V tZzBGGJj2tCvuhHyAACt0lqH+dh7ctWadbS86tB2plKIRgpgcRahUXUKBCeqKPM7TTvv CmZA==
X-Received by 10.50.136.132 with SMTP id qa4mr6571513igb.68.1447472930587; Fri, 13 Nov 2015 19:48:50 -0800 (PST)
In-Reply-To <CAPTjJmoAGfTM6NWS4=FyRMdOUnOzFXnTbnHraFjngxuCFdMUew@mail.gmail.com>
X-Content-Filtered-By Mailman/MimeDel 2.1.20+
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.20+
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>
Xref csiph.com comp.lang.python:98791

Show key headers only | View raw

On Nov 13, 2015 8:03 PM, "Chris Angelico" <rosuav@gmail.com> wrote:
>
> On Sat, Nov 14, 2015 at 1:40 PM, Steven D'Aprano <steve@pearwood.info>
wrote:
> > On Sat, 14 Nov 2015 09:42 am, Chris Angelico wrote:
> >
> >> However, this is a reasonable call for the abolition of unary plus...
> >
> > The only way you'll take unary plus out of Python is by prying it from
my
> > cold, dead hands.
> >
> >
> > BTW, unary minus suffers from the same "problem":
> >
> > x =- y  # oops, meant x -= y
> >
> > If anything, this is an argument against the augmented assignment
> > short-cuts, rather than the operators.
>
> Yes, unary minus has the same issue - but it's a lot more important
> than unary plus is. In ECMAScript, unary plus means "force this to be
> a number"; what's its purpose in Python?

I'm not sure "force this to be a number" is really a justification. Without
it you could just use - - (but be careful not to write that as --) in the
manner of using !! as "force to boolean". Or just call Number().

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

Thread

Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-14 09:42 +1100
  Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-14 13:40 +1100
    Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-14 14:01 +1100
      Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-14 16:40 +1100
        Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-14 08:43 -0700
          Re: Problems using struct pack/unpack in files, and reading them. Marko Rauhamaa <marko@pacujo.net> - 2015-11-14 18:52 +0200
            Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-15 04:04 +1100
              Re: Problems using struct pack/unpack in files, and reading them. Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-11-16 19:19 +1300
            Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-14 10:04 -0700
              Re: Problems using struct pack/unpack in files, and reading them. Marko Rauhamaa <marko@pacujo.net> - 2015-11-14 23:53 +0200
              Re: Problems using struct pack/unpack in files, and reading them. Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-11-16 19:15 +1300
                Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-16 23:11 +1100
                Re: Problems using struct pack/unpack in files, and reading them. Dave Farrance <df@see.replyto.invalid> - 2015-11-17 09:54 +0000
            Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-14 10:13 -0700
            Re: Problems using struct pack/unpack in files, and reading them. Random832 <random832@fastmail.com> - 2015-11-14 17:53 -0500
              Re: Problems using struct pack/unpack in files, and reading them. Marko Rauhamaa <marko@pacujo.net> - 2015-11-15 02:12 +0200
              Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-15 12:14 +1100
                Re: Problems using struct pack/unpack in files, and reading them. Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-11-15 11:09 -0500
                Re: Problems using struct pack/unpack in files, and reading them. Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-11-16 19:11 +1300
            Re: Problems using struct pack/unpack in files, and reading them. MRAB <python@mrabarnett.plus.com> - 2015-11-15 00:49 +0000
          Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-15 13:08 +1100
            Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-15 13:23 +1100
              Re: Problems using struct pack/unpack in files, and reading them. Steven D'Aprano <steve@pearwood.info> - 2015-11-17 00:17 +1100
                Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-17 00:27 +1100
        Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-15 03:59 +1100
    Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-13 20:45 -0700
    Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-13 20:48 -0700
    Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-14 14:56 +1100
    Re: Problems using struct pack/unpack in files, and reading them. Chris Angelico <rosuav@gmail.com> - 2015-11-14 14:57 +1100

csiph-web