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from vtk import *
reader1 = vtkXMLTreeReader()
reader1.SetFileName("treetest.xml")
reader1.Update()
view = vtkTreeMapView()
view.SetAreaSizeArrayName("size")
view.SetAreaColorArrayName("level")
view.SetAreaLabelArrayName("name")
view.SetAreaLabelVisibility(True)
view.SetAreaHoverArrayName("name")
view.SetLayoutStrategyToSquarify()
view.SetRepresentationFromInput(reader1.GetOutput())
# Apply a theme to the views
theme = vtkViewTheme.CreateMellowTheme()
view.ApplyViewTheme(theme)
theme.FastDelete()
view.ResetCamera()
view.Render()
view.GetInteractor().Start()
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