[PyKDE] Run-time error (Must construct a QApplication before a QPaintdevice)

Hans-Peter Jansen hpj at urpla.net
Fri Apr 21 08:56:37 BST 2006

Am Freitag, 21. April 2006 01:52 schrieb Adam Tenderholt:
> > If these were self-written programs that might really be the case,
> > however this is with the examples and I can't see any sign for
> > improper QApplication initialization in bigtable.py or
> > smalltable.py. I also don't think Phil has different versions of
> > the examples for X11 and Mac so I'd say something in PyQt3 is going
> > wrong on that Mac.
> Right. I don't have any idea of where to begin looking for problems
> since I'm not all that familiar with how sip and PyQt work. I noticed
> that if you open up a python shell, import qt, create the
> QApplication(sys.argv ), and then a QButton(), it's fine. However, if
> you do the same thing except create a QTable() instead of a QButton,
> I get the  error message and the python shell exits, almost like it
> segfaults.
> I've also tested with sip-snapshot-20060418 and
> PyQt-snapshot-20060407, and I get the same result.

I would start with checking the _Qt_ examples. I derived the PyQt table 
examples directly from them... Next try generating back traces from the 
segfaults with gdb, where debug builds are most useful.

Good luck,

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