In ubuntu 16.04 with pyside 1.2.2 the following line (298) creates a seg fault:
self.view.selectionModel().selectionChanged.connect(self.updateActions)
https://github.com/PySide/Examples/blob/master/examples/itemviews/editabletreemodel/editabletreemodel.py#L298
Commenting such line lets the example app run. I am still not sure what that line is for.
Thanks for the useful examples!