[Paraview] Accessing a specific variable in Python Programmable Filter

[Su, Simon M CTR USARMY ARL (US)]

Hello,

After staring at http://www.paraview.org/Wiki/Python_Programmable_Filter for a while, the way to access the data for a specific variable name still eludes me. This is the python code from the wiki on Add the Colors variable to a PolyData

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input = self.GetPolyDataInput();
output =  self.GetPolyDataOutput();

colors = vtk.vtkUnsignedCharArray();
colors.SetNumberOfComponents(3);
colors.SetName("Colors");

numPoints = input.GetNumberOfPoints()
for i in range(0, numPoints):
    colors.InsertNextTuple3(255,0,0);

output=input
output.GetPointData().AddArray(colors)

===============================

How do I from the next filter, access the variable name "Colors" that I created?

Any help is much appreciated.

thanks
-simon
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