Databases
StackOverflow2013
Postsdbo
POHow to terminate a process without os.kill() - OSGeo4W Python 2.5
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to terminate a process without os.kill() - OSGeo4W Python 2.5
    text
    copied!<p>I'm using the distribution of Python2.5.2 included in the OSGeo4W installer. This is a 32-bit distribution running on Windows 7. Although PyQt is not installed by default by the OSGeo4W installer, we have installed it to the OSGeo4W Python installation and it has worked perfectly until now. PyQt4 is version 4.8.6, and was built against a 32-bit version of Python.</p> <p>As part of a PyQt4-based UI, I currently spawn a QtCore.QProcess() and start it like this:</p> <pre><code>self.modelProcess = QtCore.QProcess() command = './OSGeo4W/gdal_python_exec.bat' argslist = 'QtCore.QString(uri, json.dumps(inputDict)) self.modelProcess.start(command, argslist) </code></pre> <p>where <code>inputDict</code> is a Python dictionary mapping python strings to arbitrary values and <code>uri</code> is a string URI to the desired script to be run.</p> <p>While this process is running, the User is presented with a window containing several Qt widgets, including a 'cancel' button. I have the following signal/slot configuration for the 'cancel' button:</p> <pre><code>self.cancelButton = QtGui.QPushButton('Cancel') self.cancelButton.clicked.connect(self.closeWindow) </code></pre> <p>And then elsewhere:</p> <pre><code>def closeWindow(self): self.modelProcess.kill() </code></pre> <p>According to the <a href="http://doc.qt.nokia.com/stable/qprocess.html#kill" rel="nofollow noreferrer">Qt documentation</a>, this should kill the process (the <a href="http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qprocess.html#kill" rel="nofollow noreferrer">PyQt documentation</a> agrees on this point). Unfortunately, this does not kill the QProcess. If I have Windows Task Manager, I can see my CPU usage continue to escalate as the QProcess happily processes my program.</p> <p>I have read <a href="https://stackoverflow.com/questions/1064335/in-python-2-5-how-do-i-kill-a-subprocess">elsewhere on SO</a> that a subprocess can be killed in Python 2.5 by using <code>os.kill()</code>, but my distribution of Python does not include the <code>kill</code> function:</p> <pre><code>&gt;&gt;&gt; import os &gt;&gt;&gt; os.kill Traceback (most recent call last): File "(stdin)", line 1, in (module) AttributeError: 'module' object has no attribute 'kill' </code></pre> <p>Is there a different approach to killing a process in Python? Some third-party module, perhaps?</p> <p>Many thanks.</p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload