VTK/Examples/Python/DistanceBetweenPoints

import vtk
import math
 
p0 = (0,0,0)
p1 = (1,1,1)
 
distSquared = vtk.vtkMath.Distance2BetweenPoints(p0,p1)
 
dist = math.sqrt(distSquared)
 
print "p0 = ", p0
print "p1 = ", p1
print "distance squared = ", distSquared
print "distance = ", dist