Provide a Paraview-Python script to calculate the uniformity index based on a given slice or clip with a given velocity field
# script should work with Paraview 4.01 or newer
# get familiar with the attached equation
# read-out the required values from an ensight data field
# calculate the interim values: local cell area, total area, local velocity, mean velocity, number of cells, ...
# calculate the uniformity-index up to the attached picture and save the output in a file
# script should also be able to handle multi-block geometries with several blocks
# an example geometry for the calculation can be provided by me