Append processed data to existing geometry

I fetch data from an existing field and used pvpython method to process the data.
The main python program is here:

rawData = servermanager.Fetch(slice1)   
data = dsa.WrapDataObject(rawData)
var1 = data.PointData['T']

the variable ‘T’ means temperature in flow, then carry on complex numerical process with Numpy.
So, how can I display the processed temperature ‘T’ in the original geometry(or mesh)?
Thank you!