[PyQt] moveToThread() does not cope with functools.partial

Phil Thompson phil at riverbankcomputing.com
Tue Apr 23 16:52:27 BST 2013

On Tue, 23 Apr 2013 15:27:17 +0200, Giuseppe Corbelli
<giuseppe.corbelli at copanitalia.com> wrote:
> On 23/04/2013 14:57, Phil Thompson wrote:
>>> Please see the minimal test code below. In short connecting a signal
>> a
>>> functools.partial slot breaks the expected moveToThread behaviour.
>>> Reasonable, I'd say, once you think about it. I'm just asking some
>>> suggestion
>>> about how this issue can be addressed. I thought about reimplementing
>> some
>>> signal class with a connect_partial method that stores bound args.
>>> Python 2.7.3, Qt 4.8.2, PyQt 4.10 on Linux.
>> Should be fixed in tonight's PyQt4 snapshot.
> I'm curious to understand how you fixed it. Can I ask for a diff or some
> other 
> pointer to look at?

Look at get_receiver() in qpy/QtCore/qpycore_pyqtboundsignal.cpp. It just
strips off the functools.partial wrappers until it gets to the QObject. The
proxy that is created is then moved to the same thread as the QObject.


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