Re: enhancement request: make py3 read/write py2 pickle format

Path	csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed2a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<jeanpierreda@gmail.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.003
X-Spam-Evidence	'H': 0.99; 'S': 0.00; 'diff': 0.05; 'dict': 0.09; 'objects.': 0.09; 'repr': 0.09; 'cc:addr:python-list': 0.10; 'wed,': 0.15; 'output': 0.15; '4:25': 0.16; 'compares': 0.16; 'reedy': 0.16; 'subject:make': 0.16; 'two,': 0.16; "{'a':": 0.16; 'wrote:': 0.16; 'string': 0.17; 'comparing': 0.18; 'tests': 0.18; 'compare': 0.20; 'cc:2**0': 0.21; 'cc:addr:python.org': 0.21; 'subject:request': 0.22; 'text,': 0.22; '2015': 0.23; '(like': 0.23; 'header:In-Reply-To:1': 0.24; 'written': 0.24; 'message- id:@mail.gmail.com': 0.28; 'subject:/': 0.29; 'terry': 0.29; 'objects': 0.29; 'code': 0.31; 'problem': 0.33; 'equal': 0.34; 'received:google.com': 0.34; 'formats': 0.35; 'strongly': 0.35; 'text': 0.36; 'except': 0.36; 'possible.': 0.36; 'there': 0.36; 'two': 0.37; 'should': 0.37; 'subject:: ': 0.37; 'difference': 0.38; 'rather': 0.38; 'pm,': 0.39; 'easily': 0.39; 'data': 0.40; 'different': 0.64; 'other.': 0.64; 'between': 0.65; 'subject:read': 0.84; 'subject:write': 0.84
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:to :cc:content-type; bh=DNtDfBE3SvPVp3fUSLp93YM7ebTz6rW9xMYUlA8yAkM=; b=adepKUhNg+UCGx3UZKBdGSxbbML/acwgLDL033xCjDeCfFYwnTeLtarAqDD+d1bnw4 Y57cxYueDZ7s4WsUEGKE1VQbKZwFkXj1J4oVONEMWZJki3pA3a5EKZ0sjYZsA05N5R3/ p3ziRYSh+YJU7vnnIUXB5Q5ONlIfHO/dglZgHpj8ePoAlvIGCyUfO0z17wZn2WJHahO6 Drl+RSmdL69/4h2nQmvhjVMesO002zHtSH704ssLleT9EH2Q/YDkbCnxCWx6wdFWF5Ji SYVGbGlJ+QkXj+y3Yhum6i2NQXQs0MZgFC+mPnfKGqNStrOXaCf0fl0G525GtMk+CjJg xQ9g==
X-Received	by 10.180.94.168 with SMTP id dd8mr23472721wib.76.1433979629873; Wed, 10 Jun 2015 16:40:29 -0700 (PDT)
MIME-Version	1.0
In-Reply-To	<mlah2i$f7$1@ger.gmane.org>
References	<ml7a2p$hp$1@ger.gmane.org> <CAMw+j7K7JmRPo3PnzTE2rZEstdZRF085+VA=v1ieMMHk2Gp6mQ@mail.gmail.com> <CABicbJ+e02OKYi48kbjFFutyLUGgkEQdiPZqiB657AO+QKu11Q@mail.gmail.com> <mailman.325.1433891190.13271.python-list@python.org> <55778208$0$2899$e4fe514c@news2.news.xs4all.nl> <mailman.328.1433897321.13271.python-list@python.org> <5577b46d$0$12975$c3e8da3$5496439d@news.astraweb.com> <mailman.332.1433911768.13271.python-list@python.org> <5578053a$0$11102$c3e8da3@news.astraweb.com> <CABicbJJFURk+kwUO-wz8K5ZXY5TYUpqor1DLr0T30PaLkW5w4A@mail.gmail.com> <mlah2i$f7$1@ger.gmane.org>
From	Devin Jeanpierre <jeanpierreda@gmail.com>
Date	Wed, 10 Jun 2015 16:39:49 -0700
Subject	Re: enhancement request: make py3 read/write py2 pickle format
To	Terry Reedy <tjreedy@udel.edu>
Cc	"comp.lang.python" <python-list@python.org>
Content-Type	text/plain; charset=UTF-8
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>
Newsgroups	comp.lang.python
Message-ID	<mailman.365.1433979632.13271.python-list@python.org> (permalink)
Lines	17
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1433979632 news.xs4all.nl 2850 [2001:888:2000:d::a6]:44215
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:92432

Show key headers only | View raw

On Wed, Jun 10, 2015 at 4:25 PM, Terry Reedy <tjreedy@udel.edu> wrote:
> On 6/10/2015 6:10 PM, Devin Jeanpierre wrote:
>
>> The problem is that there are two different ways repr might write out
>> a dict equal to {'a': 1, 'b': 2}. This can make tests brittle
>
>
> Not if one compares objects rather than string representations of objects.
> I am strongly of the view that code and tests should be written to directly
> compare objects as much as possible.

For serialization formats that always output the same string for the
same data (like text format protos), there is no practical difference
between the two, except that if you're comparing text, you can easily
supply a diff to update one to match the other.

-- Devin

Thread

Re: enhancement request: make py3 read/write py2 pickle format Chris Angelico <rosuav@gmail.com> - 2015-06-10 09:06 +1000
  Re: enhancement request: make py3 read/write py2 pickle format Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2015-06-10 02:17 +0200
    Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-09 17:47 -0700
      Re: enhancement request: make py3 read/write py2 pickle format Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-10 13:52 +1000
        Re: enhancement request: make py3 read/write py2 pickle format random832@fastmail.us - 2015-06-09 23:57 -0400
          Re: enhancement request: make py3 read/write py2 pickle format Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-10 15:43 +1000
        Re: enhancement request: make py3 read/write py2 pickle format Chris Angelico <rosuav@gmail.com> - 2015-06-10 14:00 +1000
        Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-09 21:48 -0700
          Re: enhancement request: make py3 read/write py2 pickle format Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-10 19:36 +1000
            Re: enhancement request: make py3 read/write py2 pickle format Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2015-06-10 19:34 +0200
            Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-10 15:10 -0700
              Re: enhancement request: make py3 read/write py2 pickle format Steven D'Aprano <steve@pearwood.info> - 2015-06-11 13:21 +1000
                Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-10 22:39 -0700
                Re: enhancement request: make py3 read/write py2 pickle format Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-06-11 19:20 +1000
            Re: enhancement request: make py3 read/write py2 pickle format Terry Reedy <tjreedy@udel.edu> - 2015-06-10 19:25 -0400
            Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-10 16:39 -0700
            Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-10 16:48 -0700
            Re: enhancement request: make py3 read/write py2 pickle format Terry Reedy <tjreedy@udel.edu> - 2015-06-10 19:46 -0400
            Re: enhancement request: make py3 read/write py2 pickle format Chris Angelico <rosuav@gmail.com> - 2015-06-11 09:58 +1000
            Re: enhancement request: make py3 read/write py2 pickle format Devin Jeanpierre <jeanpierreda@gmail.com> - 2015-06-10 17:02 -0700
              Re: enhancement request: make py3 read/write py2 pickle format Marko Rauhamaa <marko@pacujo.net> - 2015-06-11 07:08 +0300
            Re: enhancement request: make py3 read/write py2 pickle format Serhiy Storchaka <storchaka@gmail.com> - 2015-06-11 14:11 +0300
    Re: enhancement request: make py3 read/write py2 pickle format Chris Angelico <rosuav@gmail.com> - 2015-06-10 11:03 +1000

csiph-web