code: def test_list_items(imagenet):
      assert len(imagenet.items()) == 1000
  
file_path: flashtorch/tests/test_imagenet.py
imports: import pytest
  from collections.abc import Iterable
  from flashtorch.utils import ImageNetIndex
label_desc: Use image node_id 5 for calling a global function with example usage: test_list_items(imagenet) without return types