gistfile1.txt

    def find_root(self, node):
        """
        find the node whose parent is the invisible root item

        Parameters
        ----------
        node : QtGui.QTreeWidgetItem
            The node whose top level parent you wish to find

        Returns
        -------
        path_to_node : list
            list of keys
        node : 
        """
        node =QtGui.QTreeWidgetItem()
        node.text(0)
        path_to_node = []
        while node.parent() != self.invisibleRootItem():
            path_to_node.insert(0, node.text(0))
            node = node.parent()

        # return the node once you find it
        return node