[Paraview] Get point array data in paraview from python shell

[Jay Romero]

I am trying to get point array data ( node and its values) of a variable in
paraview: so far I can use following (python shell):

from paraview.simple import *
out = GetActiveSource()

The point array data is a velocity vector on each node, and I can calculate
magnitude of a vector, next I want to treat these magnitude values as new
point array data in the pipeline browser.
How to do in python shell?

Best Regards

Jay
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