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Editorial Team
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Asked: 2026-05-23T05:28:08+00:00

The following small python program uses the KDE APIs to retrieve the contents of

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The following small python program uses the KDE APIs to retrieve the contents of an URL. Unfortunately, it segfaults. Am I doing anything wrong, or is this a bug in KDE?

kio.py:

#!/usr/bin/env python2
# coding: utf-8

from PyKDE4 import kdecore,kio
url = kdecore.KUrl("http://www.google.com")
print url
kio.KIO.get(url)
print "ok!"

Running it:

[joel@mouton tmp]$ ./kio.py 
PyQt4.QtCore.QUrl(u'http://www.google.com')
Segmentation fault (core dumped)

The backtrace:

(gdb) bt
#0  0xb6a352a4 in QObject::thread() const () from /usr/lib/libQtCore.so.4
#1  0xb46f0b43 in ?? () from /usr/lib/libkio.so.5
#2  0xb46f0eaa in KIO::Scheduler::doJob(KIO::SimpleJob*) () from /usr/lib/libkio.so.5
#3  0xb464bb8c in ?? () from /usr/lib/libkio.so.5
#4  0xb464d81a in KIO::TransferJob::TransferJob(KIO::TransferJobPrivate&) () from /usr/lib/libkio.so.5
#5  0xb4652c69 in KIO::get(KUrl const&, KIO::LoadType, QFlags<KIO::JobFlag>) () from /usr/lib/libkio.so.5
#6  0xb4b0649b in ?? () from /usr/lib/python2.7/site-packages/PyKDE4/kio.so
#7  0xb762425a in PyCFunction_Call () from /usr/lib/libpython2.7.so.1.0
#8  0xb7682182 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#9  0xb7683f70 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#10 0xb76840c3 in PyEval_EvalCode () from /usr/lib/libpython2.7.so.1.0
#11 0xb769dc0b in run_mod () from /usr/lib/libpython2.7.so.1.0
#12 0xb769eaf2 in PyRun_FileExFlags () from /usr/lib/libpython2.7.so.1.0
#13 0xb769f7cc in PyRun_SimpleFileExFlags () from /usr/lib/libpython2.7.so.1.0
#14 0xb76a0372 in PyRun_AnyFileExFlags () from /usr/lib/libpython2.7.so.1.0
#15 0xb76b18fc in Py_Main () from /usr/lib/libpython2.7.so.1.0
#16 0x08048557 in main ()

I’m using the latest python 2.7 on Arch Linux, if that matters.

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1 Answer

  1. Editorial Team

    You need to have an event loop running in order fo this to work, which means a Q or KApplication depending on what you’re using. I usually use a KApplication.

    Some more information on KIO usage with PyKDE4 is available in the KDE Examples module:

    https://projects.kde.org/projects/kde/kdeexamples/repository/revisions/master/show/bindings/python/kio

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