code: def load3DS(filename):
      
      renderer = vtk.vtkRenderer()
      renWin = vtk.vtkRenderWindow()
      renWin.AddRenderer(renderer)
  
      importer = vtk.vtk3DSImporter()
      importer.SetFileName(filename)
      importer.ComputeNormalsOn()
      importer.SetRenderWindow(renWin)
      importer.Update()
  
      actors = renderer.GetActors()  # vtkActorCollection
      acts = []
      for i in range(actors.GetNumberOfItems()):
          a = actors.GetItemAsObject(i)
          acts.append(a)
      del renWin
      return Assembly(acts)
docs: Load ``3DS`` file format from file. Return an ``Assembly(vtkAssembly)`` object.