Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!1.eu.feeder.erje.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed2a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.000
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'subject:Python': 0.06; 'python3': 0.07; '2to3': 0.09; 'exception,': 0.09; 'operand': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'rewrite': 0.09; 'try:': 0.09; 'python': 0.11; "'a',": 0.16; "'b',": 0.16; "'c',": 0.16; 'received:80.91.229.3': 0.16; 'received:dip0.t-ipconnect.de': 0.16; 'received:plane.gmane.org': 0.16; 'received:t-ipconnect.de': 0.16; 'typeerror:': 0.16; 'exception': 0.16; 'wrote:': 0.18; 'have:': 0.19; 'skip:p 40': 0.19; 'print': 0.22; 'this?': 0.23; 'header:User-Agent:1': 0.23; 'header:X-Complaints-To:1': 0.27; "doesn't": 0.30; 'code': 0.31; "skip:' 10": 0.31; 'changes:': 0.31; 'except': 0.35; 'tool': 0.35; 'but': 0.35; 'in:': 0.36; 'should': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'skip:p 20': 0.39; 'received:org': 0.40; 'called': 0.40; 'how': 0.40; 'type(s)': 0.84
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Peter Otten <__peter__@web.de>
Subject: Re: Rewriting to Python 3
Date: Fri, 01 May 2015 10:09:24 +0200
Organization: None
References: <87egn0rcc1.fsf@Equus.decebal.nl>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7Bit
X-Gmane-NNTP-Posting-Host: p57bd85d4.dip0.t-ipconnect.de
User-Agent: KNode/4.13.3
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.3.1430467780.3347.python-list@python.org>
Lines: 38
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1430467780 news.xs4all.nl 2953 [2001:888:2000:d::a6]:47844
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:89711

Cecil Westerhof wrote:

> On my system I have:
>     PARSER_RE_STR = '/(%s)=' % '|'.join(DN_LUT.keys() + DN_LUT.values())
> in:
>     /usr/lib/python3.4/site-
packages/ndg/httpsclient/ssl_peer_verification.py
> 
> In Python 3 that gives:
>     TypeError: unsupported operand type(s) for +: 'dict_keys' and
>     'dict_values'
> 
> How should I rewrite this?


There's a tool called 2to3 -- it doesn't produce perfect code but it can 
cope with the mechanical changes:
 
$ cat demo.py    
d = dict("aA bB cC".split())

try:
    print d.keys() + d.values()
except Exception, e:
    print e
$ 2to3 -w demo.py
[...]
$ cat demo.py
d = dict("aA bB cC".split())

try:
    print(list(d.keys()) + list(d.values()))
except Exception as e:
    print(e)
$ python3 demo.py
['c', 'a', 'b', 'C', 'A', 'B']
$