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

Groups > comp.lang.python > #73053

Re: None in string => TypeError?

Path csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!news.stack.nl!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
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 0.005
X-Spam-Evidence '*H*': 0.99; '*S*': 0.00; 'false,': 0.09; 'happen,': 0.09; 'literal': 0.09; 'none)': 0.09; 'repeated': 0.09; 'subject:None': 0.09; 'subject:string': 0.09; '10:59': 0.16; 'inclined': 0.16; 'iteration.': 0.16; 'roy': 0.16; 'status)': 0.16; 'syntax,': 0.16; 'do,': 0.16; 'wrote:': 0.18; 'bit': 0.19; 'separate': 0.22; 'mon,': 0.24; 'header:In-Reply-To:1': 0.27; 'chris': 0.29; 'am,': 0.29; "doesn't": 0.30; 'message- id:@mail.gmail.com': 0.30; 'easier': 0.31; 'this.': 0.32; 'checking': 0.33; "i'd": 0.34; 'but': 0.35; 'received:google.com': 0.35; 'subject:?': 0.36; 'should': 0.36; 'list': 0.37; 'clear': 0.37; 'to:addr:python-list': 0.38; 'little': 0.38; 'moving': 0.39; 'to:addr:python.org': 0.39; 'how': 0.40; 'even': 0.60; "you're": 0.61; 'smith': 0.68; 'construction': 0.72; 'clearer': 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 :content-type; bh=gYEyoVlhZJt0ZOgPheFVH9jHiWkyV7xf2K2eK7Hyeyw=; b=KyroPirC3kNoxbnZIkGDZTmwk4YZxS8w64pAHn77Vd7AJ/cY/WaQlawKCHOJmuZLNG /MrKbqzbPphQNfwjFSKlCr2McgvrcQkdrqvqfuAIG6Vm+7XQUdXcixy/G32UrtKBVeA5 vq+P/of2rtoEyz7QEhyKMNys4jM8UpsditY8HNgmvjuSF49og2bwSVWCQznPS9kQHO0Z 6J63deiOFQqvzhAwI1Znkkvg4pSApjsqQhVJslr2xWNFoESAbqIs1NRDC2q+7jMoFr4N zZ/yrdQExMIqgslgqCuKPNf3KpzeT9aDVtSVkLhCI58BnNeaqtU50Si5LCYUf6xJXPan 5Tww==
X-Received by 10.236.229.133 with SMTP id h5mr15776571yhq.64.1402334578396; Mon, 09 Jun 2014 10:22:58 -0700 (PDT)
MIME-Version 1.0
In-Reply-To <CAPTjJmqt+2doOdr-UJTMsDu1f1ZnKD+WEp5SY_LGekR3-FsuOg@mail.gmail.com>
References <048960da-c132-407f-b1b3-4612a3dd7697@googlegroups.com> <20140609185728.3cac55ab@x34f> <03B8D21C-62B4-4344-AA25-FF82501C33D0@panix.com> <CAPTjJmqt+2doOdr-UJTMsDu1f1ZnKD+WEp5SY_LGekR3-FsuOg@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Mon, 9 Jun 2014 11:22:18 -0600
Subject Re: None in string => TypeError?
To Python <python-list@python.org>
Content-Type text/plain; charset=UTF-8
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.15
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.10930.1402334970.18130.python-list@python.org> (permalink)
Lines 18
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1402334970 news.xs4all.nl 2939 [2001:888:2000:d::a6]:47251
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:73053

Show key headers only | View raw

On Mon, Jun 9, 2014 at 10:59 AM, Chris Angelico <rosuav@gmail.com> wrote:
> On Tue, Jun 10, 2014 at 2:53 AM, Roy Smith <roy@panix.com> wrote:
>> In retrospect, I suspect:
>>
>>           hourly_data = [(t if status in set('CSRP') else None) for (t,
>> status) in hours]
>>
>> is a little cleaner.
>
> I'd go with this. It's clearer that a status of 'SR' should result in
> False, not True. (Presumably that can never happen, but it's easier to
> read.) I'd be inclined to use set literal syntax, even though it's a
> bit longer - again to make it clear that these are four separate
> strings that you're checking against.

Depending on how much work this has to do, I might also consider
moving the set construction outside the list comprehension since it
doesn't need to be repeated on every iteration.

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

Thread

None in string => TypeError? Roy Smith <roy@panix.com> - 2014-06-09 08:34 -0700
  Re: None in string => TypeError? Ryan Hiebert <ryan@ryanhiebert.com> - 2014-06-09 10:42 -0500
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 09:50 -0600
  Re: None in string => TypeError? Paul Sokolovsky <pmiscml@gmail.com> - 2014-06-09 18:57 +0300
    Re: None in string => TypeError? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 16:14 +0000
      Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 02:31 +1000
  Re: None in string => TypeError? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-06-09 16:07 +0000
  Re: None in string => TypeError? MRAB <python@mrabarnett.plus.com> - 2014-06-09 17:06 +0100
  Re: None in string => TypeError? Shiyao Ma <i@introo.me> - 2014-06-10 00:13 +0800
  Re: None in string => TypeError? Roy Smith <roy@panix.com> - 2014-06-09 12:53 -0400
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 02:59 +1000
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 11:22 -0600
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 03:40 +1000
  Re: None in string => TypeError? Ian Kelly <ian.g.kelly@gmail.com> - 2014-06-09 11:58 -0600
  Re: None in string => TypeError? Chris Angelico <rosuav@gmail.com> - 2014-06-10 04:02 +1000

csiph-web