(self, node)
Get the parent of a given node or ROOT_PARENT if the node is the root.

        Parameters
        ----------
        node : object

        Returns
        -------
        object
Get the parent of a given node or ROOT_PARENT if the node is the root.
Get the parent of a given node or ROOT_PARENT if the node is the root .
def parent(self, node):
        """Get the parent of a given node or ROOT_PARENT if the node is the root.

        Parameters
        ----------
        node : object

        Returns
        -------
        object

        """
def parent ( self , node ) :