old_contents: from vtk import *
  
  
  reader = vtkXMLTreeReader()
  reader.SetFileName("vtkclasses.xml")
  reader.Update()
  print reader.GetOutput()
  
  view = vtkGraphLayoutView()
  view.AddRepresentationFromInputConnection(reader.GetOutputPort())
  view.SetVertexLabelArrayName("id")
  view.SetVertexLabelVisibility(True)
  view.SetVertexColorArrayName("vertex id")
  view.SetColorVertices(True)
  view.SetLayoutStrategyToCone()
  view.SetInteractionModeTo3D() # Left mouse button causes 3D rotate instead of zoom
  view.SetLabelPlacementModeToLabelPlacer()
  
  theme = vtkViewTheme.CreateMellowTheme()
  theme.SetCellColor(.2,.2,.6)
  theme.SetLineWidth(2)
  theme.SetPointSize(10)
  view.ApplyViewTheme(theme)
  theme.FastDelete()
  
  window = vtkRenderWindow()
  window.SetSize(600, 600)
  view.SetupRenderWindow(window)
  view.GetRenderer().ResetCamera()
  window.Render()
  window.GetInteractor().Start()
new_contents: from vtk import *
  
  
  reader = vtkXMLTreeReader()
  reader.SetFileName("vtkclasses.xml")
  
  view = vtkGraphLayoutView()
  view.AddRepresentationFromInputConnection(reader.GetOutputPort())
  view.SetVertexLabelArrayName("id")
  view.SetVertexLabelVisibility(True)
  view.SetVertexColorArrayName("vertex id")
  view.SetColorVertices(True)
  view.SetLayoutStrategyToCone()
  view.SetInteractionModeTo3D() # Left mouse button causes 3D rotate instead of zoom
  view.SetLabelPlacementModeToLabelPlacer()
  
  theme = vtkViewTheme.CreateMellowTheme()
  theme.SetCellColor(.2,.2,.6)
  theme.SetLineWidth(2)
  theme.SetPointSize(10)
  view.ApplyViewTheme(theme)
  theme.FastDelete()
  
  window = vtkRenderWindow()
  window.SetSize(600, 600)
  view.SetupRenderWindow(window)
  view.GetRenderer().ResetCamera()
  window.Render()
  window.GetInteractor().Start()
subject: Remove errant printout in python cone layout example.