X-FeedAbuse: http://nntpfeed.proxad.net/abuse.pl feeded by 88.191.16.109
Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.dougwise.org!nntpfeed.proxad.net!nospam.fr.eu.org!usenet-fr.net!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <phil@riverbankcomputing.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; 'skip:p 40': 0.04; 'thread,': 0.04; 'properly.': 0.09; 'slot': 0.09; 'gui': 0.13; '"0"': 0.16; 'lambda': 0.16; 'received:openhosting.com': 0.16; 'received:user.openhosting.com': 0.16; 'timeout': 0.16; 'cc:addr :python-list': 0.16; 'wrote:': 0.16; 'subject:Help': 0.17; 'cc:no real name:2**0': 0.20; 'cc:2**0': 0.22; 'header:In-Reply-To:1': 0.22; '-0700': 0.23; 'aug': 0.24; 'code': 0.25; 'skip:p 30': 0.28; 'import': 0.28; 'cc:addr:python.org': 0.30; 'header:User-Agent:1': 0.34; 'external': 0.35; 'object': 0.35; 'fri,': 0.36; 'skip:" 10': 0.36; 'example,': 0.37; 'using': 0.37; 'signal': 0.38; 'subject:: ': 0.39; 'why': 0.39; 'your': 0.61; 'dear': 0.63; 'pro': 0.89
X-Virus-Scanned: Debian amavisd-new at rvrbank1.user.openhosting.com
MIME-Version: 1.0
Date: Fri, 19 Aug 2011 18:56:30 +0100
From: Phil Thompson <phil@riverbankcomputing.com>
To: Edgar Fuentes <fuentesej@gmail.com>
Subject: Re: Help on PyQt4 QProcess
Organization: Riverbank Computing Limited
In-Reply-To: <54614b21-2c80-444c-8ac5-89fc52b77121@fv14g2000vbb.googlegroups.com>
References: <54614b21-2c80-444c-8ac5-89fc52b77121@fv14g2000vbb.googlegroups.com>
X-Sender: phil@riverbankcomputing.com
User-Agent: RoundCube Webmail/0.3.1
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8
Cc: python-list@python.org
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.229.1313777088.27778.python-list@python.org>
Lines: 34
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1313777088 news.xs4all.nl 23856 [2001:888:2000:d::a6]:51266
X-Complaints-To: abuse@xs4all.nl
Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:11862

On Fri, 19 Aug 2011 10:15:20 -0700 (PDT), Edgar Fuentes
<fuentesej@gmail.com> wrote:
> Dear friends,
> 
> I need execute an external program from a gui using PyQt4, to avoid
> that hang the main thread, i must connect the signal "finished(int)"
> of a QProcess to work properly.
> 
> for example, why this program don't work?
> 
>    from PyQt4.QtCore import QProcess
>    pro = QProcess() # create QProcess object
>    pro.connect(pro, SIGNAL('started()'), lambda
> x="started":print(x))        # connect
>    pro.connect(pro, SIGNAL("finished(int)"), lambda
> x="finished":print(x))
>    pro.start('python',['hello.py'])        # star hello.py program
> (contain print("hello world!"))
>    timeout = -1
>    pro.waitForFinished(timeout)
>    print(pro.readAllStandardOutput().data())
> 
> output:
> 
>    started
>    0
>    b'hello world!\n'
> 
> see that not emit the signal finished(int)

Yes it is, and your lambda slot is printing "0" which is the return code
of the process.

Phil