Re: why i have the output of [None, None, None]

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!xlned.com!feeder1.xlned.com!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path	<johannes.schneider@galileo-press.de>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.007
X-Spam-Evidence	'H': 0.99; 'S': 0.00; 'output': 0.05; 'amtsgericht': 0.07; 'hrb': 0.07; 'none,': 0.07; 'subject: [': 0.09; 'subject:None': 0.09; 'thats': 0.09; '[none,': 0.16; 'none.': 0.16; 'none]': 0.16; 'rainer': 0.16; 'ralf': 0.16; 'wrote:': 0.18; '>>>': 0.22; 'gmbh': 0.22; 'print': 0.22; 'header :User-Agent:1': 0.23; 'germany': 0.24; 'header:In-Reply-To:1': 0.27; 'subject:the': 0.34; 'there': 0.35; 'subject:]': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'length': 0.61; 'received:194': 0.64; 'skip:+ 10': 0.65; 'tel.:': 0.65; 'press': 0.70; 'power': 0.76; 'subject:have': 0.80; 'received:192.168.57': 0.84
Date	Thu, 10 Apr 2014 15:59:48 +0200
From	Johannes Schneider <johannes.schneider@galileo-press.de>
User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20131103 Icedove/17.0.10
MIME-Version	1.0
To	python-list@python.org
Subject	Re: why i have the output of [None, None, None]
References	<CAOmh462GH82jW3cfR-bW9nin9vf1uDB5_nMPiNch3t3H4mYWdg@mail.gmail.com>
In-Reply-To	<CAOmh462GH82jW3cfR-bW9nin9vf1uDB5_nMPiNch3t3H4mYWdg@mail.gmail.com>
Content-Type	text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding	8bit
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.9138.1397140019.18130.python-list@python.org> (permalink)
Lines	32
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1397140019 news.xs4all.nl 2879 [2001:888:2000:d::a6]:50839
X-Complaints-To	abuse@xs4all.nl
Xref	csiph.com comp.lang.python:70042

Show key headers only | View raw

because thats the return value of [...]
print retuns None.

On 10.04.2014 15:54, length power wrote:
>  >>> x=['','x1','x2','x3','   ']
>  >>> x
> ['', 'x1', 'x2', 'x3', '   ']
>  >>> [print("ok") for it in x if it.strip() !=""]
> ok
> ok
> ok
> [None, None, None]
>
> i understand there are three 'ok' in the output,but why i have the
> output of [None, None, None]
>
>


-- 
Johannes Schneider
Webentwicklung
johannes.schneider@galileo-press.de
Tel.: +49.228.42150.xxx

Galileo Press GmbH
Rheinwerkallee 4 - 53227 Bonn - Germany
Tel.: +49.228.42.150.0 (Zentrale) .77 (Fax)
http://www.galileo-press.de/

Geschäftsführer: Tomas Wehren, Ralf Kaulisch, Rainer Kaltenecker
HRB 8363 Amtsgericht Bonn

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

Thread

Re: why i have the output of [None, None, None] Johannes Schneider <johannes.schneider@galileo-press.de> - 2014-04-10 15:59 +0200

csiph-web