[chengdi]

I have a 3d model, Lx >> Ly,Lz, a long tube-like channel. And I want to do some weighted average in x-normal cross section like this:

I = \int(rho*u*u*u)dA/\int(rho*u*u)dA

I did slice and tried integrate variable and programmable filter, but there are two problems:

1. how to define an integral like the equation above
2. how to get dA in programmable filter? I can only get rho and u

Now, I get here:
1 # coding: utf-8
2 from paraview.simple import *
3 reader = OpenDataFile('./cavity.foam')
4 slice = Slice(reader)
5 slice.SliceOffsetValues.SetData(0.01)
6 calc = Calculator(slice)
7 calc.AttributeMode = 'Cell Data'
8 calc.ResultArrayName='pU'
9 calc.Function='p*U'
10 inte = IntegrateVariables(calc)
11 inte.UpdatePipeline()
12 print inte.CellData['pU']

But the result is:
Array: pU

Now the question is how to get the real value of this pU? I NEED it! I can see it in the tableview if I do the process in paraFoam. But how can I do it in pvpython?

It seems that there is some tools to convert it to numbers, but I did find it out yet.

[chengdi]

I just find out how to fetch the data:
for Integrate Variables, I can get the data by
print inte.CellData['pU'].GetRange()[0]
for other data, I think it should be like this:
servermanager.Fetch(inte).GetCellData().GetArray(' pU').GetValue(0)