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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
theme = vtkViewTheme.CreateMellowTheme()
theme.SetCellColor(.2,.2,.6)
theme.SetLineWidth(2)
theme.SetPointSize(10)
view.ApplyViewTheme(theme)
theme.FastDelete()
view.GetRenderWindow().SetSize(600, 600)
view.ResetCamera()
view.Render()
view.GetInteractor().Start()
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