Hello,
The more recent releases of PyQt4 seem to break pylint ... pylint will
emit the following errors
(i) unable to find submodules of PyQt4
main.py:3: [E0611] No name 'QtCore' in module 'PyQt4'
main.py:4: [E0611] No name 'QtGui' in module 'PyQt4'
(ii) as a result, all use of classes from eg QtGui, or inheritors from
them, spark lots of errors
main.py:11: [E1101, MyValidator] Module 'PyQt4.QtGui2' has no
'QValidator' member
main.py:33: [E1101, DaycountWidget.__init__] Instance of
'DaycountWidget' has no 'setEditable' member
I've tracked down the problem I believe ...
* PyQt4.QtCore's namespace has instances of a c-module defined type
called pyqtSignal
* pylint believes these are methoddescriptors
[inspect.ismethoddescriptor(.) -> returns true ]
* However, they do not have __name__ or __doc__ defined, which logilab/
astng/raw_building.py:object_build_methoddescriptor expects
As a result pylint basically refuses to load the Qt modules and this
causes all subsequent errors.
How to fix? The following patch will avoid the error
--- logilab/astng/builder.py.orig 2009-07-27 18:43:54.000000000 +1200
+++ logilab/astng/builder.py 2009-07-27 18:44:57.000000000 +1200
@@ -194,8 +194,12 @@
# recursion
self.object_build(class_node, member)
elif ismethoddescriptor(member):
- assert isinstance(member, object)
- object_build_methoddescriptor(node, member)
+ # avoid objects without __name__, they're not what
they seem ...
+ # (eg PyQt4.QtCore.pyqtSignal instances)
+ if hasattr(member, "__name__") and hasattr(member,
"__doc__"):
+ assert isinstance(member, object)
+ object_build_methoddescriptor(node, member)
+ else: attach_dummy_node(node, name, member)
elif isdatadescriptor(member):
assert isinstance(member, object)
object_build_datadescriptor(node, member, name)
After this patch pylint seems to work as expected. However users must
ensure their code imports PyQt4.QtGui before PyQt4.QtCore or a bus
error will occur when running pylint. (I have no idea why ... within a
python program itself it doesn't mind the order in which they are
imported).
Hope this is useful, I know that there are a few posts to newsgroups
wondering how to fix this problem
Derek.
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