2. Python

2.1 abstract
from vtkpython import *

"prepare data"
"prepare actors"

 # prepare renderer
ren = vtkRenderer()
win = vtkRenderWindow() # on-screen
win.AddRenderer(ren)
 # interactor
iren = vtkRenderWindowInteractor ()
iren.SetRenderWindow (win)

 # actors
ren.AddActor (streamersActor)
ren.AddActor (sphereVActor)
ren.AddActor (contourActor)
ren.AddActor (sBarActor)
ren.AddActor (axesActor)

win.Render ()
win.SetFileName ('%s.ppm' % arg)
win.SaveImageAsPPM ()

iren.Initialize ()
iren.Start ()