CFD Online Discussion Forums - [OpenFOAM] Integrate Variables using ParaView Python Shell

Hello everyone. I want to access the result of U after applying integrate variables filter. This is easy and can be done manually but I want to do this using Python Shell for my further calculations.

For this, I open Paraview and select my mesh regions and cell arrays and after that, I run Python Shell and run my script. However, I get error as

Code:

Traceback (most recent call last):

File "<string>", line 16, in <module>

AttributeError: 'NoneType' object has no attribute 'GetValue'

The following is my Python script:

Code:

import paraview.simple as pvs

data = pvs.Wavelet()

my_slice = pvs.Slice(Input=data)

my_slice.SliceType = 'Plane'

my_slice.SliceType.Origin = [0.0, 0.0, 0.0]

my_slice.SliceType.Normal = [0.0, 1.0, 0.0]

my_slice.SliceType.Offset = 0.0

my_slice.Crinkleslice = 0

my_slice.Triangulatetheslice = 0

my_slice.SliceOffsetValues = [0.0]

iv = IntegrateVariables(Input=my_slice)

iv.UpdatePipeline()

data = servermanager.Fetch(iv) 

numPoints=data.GetNumberOfCells()

print numPoints

U10=data.GetCellData().GetArray("U1").GetValue(1) # This is the line no. 16

print U10

I am doing something wrong. I checked the forum and Google but I couldn't find my mistake. Can you help me to correct this?