Use output of filter for input of other filters

ParaView Support
3

Hello mathieu,
but from servermanager.fetch I get a vtk object that from this sometimes there are some properties sometimes not… for example here it is used this after the servermanager.fetch
calc_vtk.GetPointData() link where calc_vtk is the result of servermanager.fetch(filter) but for example if I do the following I get an empty result:

import paraview.servermanager as sm
s=Sphere(Radius=10)
boundingRuler1 = BoundingRuler(registrationName='boundingRuler1', Input=s, Axis = 'X Axis')
ruler = sm.Fetch(boundingRuler1)
ruler.GetPointData().GetArray('Points')

what I am missing? the boundingRuler has point data and also has the array Points