[PyQt] Bug: PyQt5.uic.loadUi() attempts to set non-existing property

[Mathias.Born at gmx.de]

Hi,

There appears to be an error in the loading of .ui files in PyQt5.
Please try the attached example.

Error message:

Traceback (most recent call last):
  File "D:\eclipse.workspace\py_tests\src\uic_bug.py", line 15, in <module>
    window = LogWindow()
  File "D:\eclipse.workspace\py_tests\src\uic_bug.py", line 8, in __init__
    PyQt5.uic.loadUi(os.path.join(os.path.dirname(__file__), 'log_window.ui'), self)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\__init__.py", line 224, in loadUi
    return DynamicUILoader(package).loadUi(uifile, baseinstance, resource_suffix)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\Loader\loader.py", line 72, in loadUi
    return self.parse(filename, resource_suffix, basedir)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\uiparser.py", line 931, in parse
    actor(elem)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\uiparser.py", line 756, in createUserInterface
    self.traverseWidgetTree(elem)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\uiparser.py", line 734, in traverseWidgetTree
    handler(self, child)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\uiparser.py", line 444, in createLayout
    self.stack.push(self.setupObject(classname, parent, elem))
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\uiparser.py", line 161, in setupObject
    self.wprops.setProperties(obj, branch)
  File "D:\_cpp_projects_\Python\Python-3.3.1\lib\site-packages\PyQt5\uic\properties.py", line 415, in setProperties
    getattr(widget, "set%s%s" % (ascii_upper(prop_name[0]), prop_name[1:]))(prop_value)
AttributeError: 'QHBoxLayout' object has no attribute 'setMargin'


The log_window.ui instantiates a QHBoxLayout, with all margins set to the same value. This makes
the uic module try to set a "margin" property, which doesn't exist.
Setting one of the margins (for example "leftMargin") to a different value works.

Best Regards,
Mathias Born
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