RE: subprocess question

Path	csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!news-out1.kabelfoon.nl!newsfeed.kabelfoon.nl!xindi.nntp.kabelfoon.nl!feed.xsnews.nl!border-2.ams.xsnews.nl!xlned.com!feeder7.xlned.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path	<jyoung79@kc.rr.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.055
X-Spam-Evidence	'H': 0.89; 'S': 0.00; ':-)': 0.06; 'shortcut': 0.09; 'subprocess': 0.09; 'err': 0.16; 'subject:subprocess': 0.16; 'subject:question': 0.17; 'help.': 0.19; 'slightly': 0.19; 'cheers,': 0.20; 'shell': 0.24; 'import': 0.27; 'received:10.127': 0.30; 'received:75.180': 0.30; 'received:75.180.132': 0.30; 'received:cdptpa-omtalb.mail.rr.com': 0.30; 'chris': 0.30; 'url:library': 0.31; 'does': 0.32; "can't": 0.32; 'to:addr:python- list': 0.34; 'received:mail.rr.com': 0.34; 'thank': 0.35; 'url:python': 0.36; 'question': 0.36; 'security.': 0.37; 'reasons': 0.37; 'received:75': 0.37; 'another': 0.37; 'using': 0.38; 'skip:o 20': 0.38; 'received:rr.com': 0.39; 'url:docs': 0.39; 'url:org': 0.39; 'why': 0.39; 'to:addr:python.org': 0.40; 'might': 0.40; 'your': 0.61; 'from:no real name:2**0': 0.63; 'home': 0.65; 'yourself': 0.69; 'url:os': 0.84
Authentication-Results	cdptpa-omtalb.mail.rr.com smtp.user=jyoung79@kc.rr.com; auth=pass (LOGIN)
X-Authority-Analysis	v=2.0 cv=KapQQHkD c=1 sm=0 a=IkcTkHD0fZMA:10 a=8AHkEIZyAAAA:8 a=qril8qUUEh1n3ePxloYA:9 a=sAIgZzkrgHfuPylsKk8A:7 a=QEXdDO2ut3YA:10 a=6Z_hFMlBv7QA:10 a=A4pbnY0UTNUA:10 a=vlExglOGJjceklXinUHbxg==:117
X-Cloudmark-Score	0
Date	Mon, 12 Dec 2011 14:49:06 +0000
From	<jyoung79@kc.rr.com>
To	python-list@python.org
Subject	RE: subprocess question
MIME-Version	1.0
Content-Type	text/plain; charset=utf-8
Content-Transfer-Encoding	7bit
X-Priority	3 (Normal)
Sensitivity	Normal
X-Originating-IP
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.12
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<http://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	<http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups	comp.lang.python
Message-ID	<mailman.3546.1323701349.27778.python-list@python.org> (permalink)
Lines	27
NNTP-Posting-Host	2001:888:2000:d::a6
X-Trace	1323701349 news.xs4all.nl 6897 [2001:888:2000:d::a6]:48879
X-Complaints-To	abuse@xs4all.nl
Xref	x330-a1.tempe.blueboxinc.net comp.lang.python:17044

Show key headers only | View raw

>>>>> import subprocess 
>>>>> p = subprocess.Popen(['du', '-sh'], cwd='/Users/jay/.Trash/', 
>> stdout=subprocess.PIPE) 
>>>>> out, err = p.communicate() 
>>>>> out 
>> ' 11M\t.\n' 
 
> You might prefer to use subprocess.check_output(); it slightly 
> simplifies your code: 
> http://docs.python.org/library/subprocess.html#subprocess.check_output 
 
>> And another question - why can't I use the tilde as a shortcut to the home 
>> directory? 
 
> Because ~ is interpolated by the shell and `subprocess` does not use 
> the shell by default for reasons that include efficiency and security. 
> You can expand ~ yourself using os.path.expanduser(): 
> http://docs.python.org/library/os.path.html#os.path.expanduser 
> Alternatively, you can opt to use the shell by passing shell=True as 
> an argument. 
 
> Cheers, 
> Chris 

Thank you very much, Chris and Andrew, for your help.  I appreciate it!  :-)

Jay

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

Thread

RE: subprocess question <jyoung79@kc.rr.com> - 2011-12-12 14:49 +0000

csiph-web