QTreeView with QAbstractItemModel

[Fletcher]

I am using layoutAboutToBeChanged().

Here's what I'm doing. It's PyQt. I have a tree made of TreeItem()s (my node class)

# in subclass of QAbstractItemModel
    def recreateTree(self):
        self.emit(QtCore.SIGNAL('layoutAboutToBeChanged()'))
        self.root = TreeItem(None)
        # omitted code to generate the other nodes and add them to root
        self.emit(QtCore.SIGNAL('layoutChanged()'))

# in subclass of QAbstractItemModel
    def recreateTree(self):
        self.emit(QtCore.SIGNAL('layoutAboutToBeChanged()'))
        self.root = TreeItem(None)
        # omitted code to generate the other nodes and add them to root
        self.emit(QtCore.SIGNAL('layoutChanged()'))

To copy to clipboard, switch view to plain text mode 

When I reassign self.root, Python automatically deletes the old tree (or should) since there's no other reference to it.