[PyQt] Problem using promoted widgets with PyQt 4.4.2
jan.ekholm at smultron.net
Wed Jul 30 11:47:55 BST 2008
Yesterday I upgraded to PyQt 4.4.2 as such a package was available as a part
of the Kubuntu packages for KDE 4.1. Didn't think too much about it, but now
that I try to run my photo management app I get some problems that I can't
seem to solve. The application heavily relies on promoted widgets and that
has worked fine since I moved the app to PyQt4 some years ago. Now with 4.4.2
I get this when I try to run a minimal cut down part of the app:
% python tags.py
Traceback (most recent call last):
File "tags.py", line 64, in <module>
File "tags.py", line 19, in __init__
File "/usr/lib/python2.5/site-packages/PyQt4/uic/__init__.py", line 106, in
return loader.DynamicUILoader().loadUi(uifile, baseinstance)
File "/usr/lib/python2.5/site-packages/PyQt4/uic/Loader/loader.py", line 22,
File "/usr/lib/python2.5/site-packages/PyQt4/uic/uiparser.py", line 572, in
<snip some levels>
File "/usr/lib/python2.5/site-packages/PyQt4/uic/uiparser.py", line 155, in
self.stack.push(self.setupObject(widgetClass(elem), parent, elem))
File "/usr/lib/python2.5/site-packages/PyQt4/uic/uiparser.py", line 130, in
obj = self.factory.createQObject(clsname, name, args, is_attribute)
File "/usr/lib/python2.5/site-packages/PyQt4/uic/objcreator.py", line 59, in
classType = self.findQObjectType(classname)
File "/usr/lib/python2.5/site-packages/PyQt4/uic/objcreator.py", line 67, in
w = module.search(classname)
line 48, in search
return getattr(self._modules[module], cls)
AttributeError: 'module' object has no attribute 'KeywordTree'
The class KeywordTree is a promoted widget that inherits QTreeWidget and this
worked fine with older versions of PyQt4 (the version shipped with Kubuntu
Hardy). The .ui file is loaded dynamically with loadUi() and the actual .ui
file is attached.
Relevant sections from the .ui seem to be the usage of the KeywordTree widget:
<widget class="KeywordTree" name="keyword_tree" >
<property name="text" >
And the promoted data:
The real KeywordTree class is in a file keyword_tree.py and simply defines a
QtGui.QTreeWidget subclass. This has worked for years. Also, some other apps
that also use promoted widgets work just normally, so the whole
promotion/loading mechanism is not broken, only in this case have I stumbled
across any problems.
I consider nuking KDE 4.1 if I can't solve this, as this application is *very*
important for us. But perhaps there's something that a n00b like me hasn't
spotted? Something that used to work despite it being wrong?
- "What're quantum mechanics?"
- "I don't know. People who repair quantums, I suppose."
-- Terry Pratchett, in Eric
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