Section: Visualization Toolkit Filtering Classes
vtkDirectedGraph is read-only. To create an undirected graph, use an instance of vtkMutableDirectedGraph, then you may set the structure to a vtkDirectedGraph using ShallowCopy().
To create an instance of class vtkDirectedGraph, simply invoke its constructor as follows
obj = vtkDirectedGraph
obj
is an instance of the vtkDirectedGraph class.
string = obj.GetClassName ()
int = obj.IsA (string name)
vtkDirectedGraph = obj.NewInstance ()
vtkDirectedGraph = obj.SafeDownCast (vtkObject o)
int = obj.GetDataObjectType ()