code: def create_half_unit_sphere():
      sphere = create_half_unit_sphere(7)
      v, e, f = sphere.vertices, sphere.edges, sphere.faces
      assert_array_almost_equal((v * v).sum(1), 1)
  
label_desc: Use image node_id 2 for calling a global function with example usage: create_half_unit_sphere() without return types