code: def test_list_nab():
      assert len(files) == 58
  
file_path: alibi-detect/alibi_detect/tests/test_datasets.py
imports: import numpy
  import pandas
  import pytest
  from requests import RequestException
  from urllib.error import URLError
  from alibi_detect.datasets import fetch_kdd, fetch_ecg, corruption_types_cifar10c, fetch_cifar10c, fetch_attack, fetch_nab, get_list_nab
  from alibi_detect.utils.data import Bunch
label_desc: Use image node_id 6 for calling a global function with example usage: test_list_nab() without return types