VTK/Examples/Python/Arrays/GetValues

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Seems to work, but segfaults at the end?

GetValues.py

from __future__ import print_function
import vtk
from vtk import *

#setup sphere
sphereSource = vtk.vtkSphereSource()
sphereSource.Update()

polydata = vtk.vtkPolyData()
polydata.ShallowCopy(sphereSource.GetOutput())

normals = polydata.GetPointData().GetNormals();
normal0 = normals.GetTuple3(0);

print("Normal0: " + str(normal0[0]) + " " + str(normal0[1]) + " " + str(normal0[2]))