scale_factor = 5

indata = GetActiveSource()

bounds = indata.GetDataInformation().GetBounds()
center = ((bounds[0] + bounds[1])/2,
          (bounds[2] + bounds[3])/2,
          (bounds[4] + bounds[5])/2)
Hide()

transform_to_center = Transform()
transform_to_center.Transform.Translate = [-center[0], -center[1], -center[2]]
Hide()

scale = Transform()
scale.Transform.Scale = [scale_factor, scale_factor, scale_factor]
Hide()

transform_from_center = Transform()
transform_from_center.Transform.Translate = [center[0], center[1], center[2]]
Show()

Render()