from paraview.simple import *

view=CreateRenderView()
view.ViewSize = [400, 400]
view.ResetCamera()
view.Background=[0.7,0.7,0.7]
view.CameraViewUp = [0,1,0]

Sphere(PhiResolution = 1024, ThetaResolution = 1024);
Elevation(LowPoint=[-0.5, -0.5, -0.5],HighPoint=[0.5, 0.5, 0.5])
PythonCalculator(Expression='Elevation*Elevation')
rep = Show()

lut = MakeBlueToRedLT(0,1)
lut.NumberOfTableValues=100
rep.LookupTable=lut
rep.ColorAttributeType='POINT_DATA'
rep.ColorArrayName='Elevation'

bar=CreateScalarBar(LookupTable=lut,Title='Elevation')
bar.TitleColor=[0,0,0]
bar.LabelColor=[0,0,0]
bar.NumberOfLabels=3

view.Representations.append(bar)

view.StillRender()
WriteImage("elevationsphere.png",view=view,Writer="vtkPNGWriter")