code: def test_1():
      root_dir = os.path.join(EXAMPLES_ROOT, "imagenet")
      image_root_dir = os.path.join(root_dir, ".testdata/images")
      list_file = os.path.join(root_dir, ".testdata/data.txt")
  
      with test_utils.ExampleRunner(root_dir) as r:
          r.run(
              "compute_mean.py",
              [
                  "-R",
                  image_root_dir,
                  list_file,
              ],
          )
  
          r.run(
              "train_imagenet.py",
              [
                  "-a",
                  "nin",
                  "-R",
                  image_root_dir,
                  "-B",
                  "1",
                  "-b",
                  "1",
                  "-E",
                  "1",
                  list_file,
                  list_file,
              ],
          )
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_1() without return types