code: def test_sphere_dtypes():
      for sphere_name, sphere_path in SPHERE_FILES.items():
          sphere_data = np.load(sphere_path)
          npt.assert_equal(
              sphere_data["vertices"].dtype, np.dtype("<f8")
          )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_sphere_dtypes() without return types