On 1/19/2009 4:36 PM, Christoph Burgmer wrote:
Am Monday, 19. January 2009 schrieb Giovanni Bajo:
> On 1/19/2009 3:13 PM, eliben wrote:
> > I've seen various references to this issue before, but nothing to fully
> > address it as I'd expect.
> >
> > Can you comment on the pros and cons of using QThread vs Python's
threads
> > with PyQt?
> >
> > I'll begin: on the surface, Python's threads make more sense because
> > they're Qt independent and can be ported between apps that don't
> > necessarily depend on Qt (for example a web version of a GUI app). The
> > Python thread API is powerful enough for all uses, it seems.
> >
> > However, there are concerns. Perhaps QThreads are more efficient? Or
> > maybe more tightly integrated with the other parts of PyQt, so it's
> > easier to use them?
>
> It's mostly the same. The main difference is that QThreads are better
> integrated with Qt (asynchrnous signals/slots, event loop, etc.). Also,
> you can't use Qt from a Python thread (you can't for instance post event
> to the main thread through QApplication.postEvent): you need a QThread
> for that to work.
I am doing a
QCoreApplication.postEvent()
out of "run()" from a "threading.Thread" class without any problems.
That's only because you are lucky. It's not something that's officially
supported and I have spent days debugging random crashes that turned out
being Qt accesses from threads allocated by Python.
I suggest you to fix your code.
--
Giovanni Bajo
Develer S.r.l.
http://www.develer.com
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