What is the python script equivalent of the "Apply" button for the "slice" filter?

I have an image file .mha to which I applied the slice filter. I can change the normal direction of the slice from a python script.

pm = servermanager.ProxyManager() mha_slice = pm.GetProxy("sources","mha_slice") view1 = pm.GetProxy("views","RenderViewer1") widget =
pm.GetProxy("3d_widgets_prototypes","ImplicitPlaneWidgetRepresentation1") widget.Normal = [ 1 , 0 , 0] view1.StillRender()

The normal plane is updated, but I can't get the slice filter to cut the data and display the approriate slice plane. I'm guessing the "apply" button updates the Pipeline ? so i tried

UpdatePipeline() UpdatePipelineInformation() Update() UpdateRequired() UpdateSelfAndAllInputs() UpdateVTKObjects()

but I cannot get the same behavior as the "apply" button

thanks, df