code: def test_url_is_not_accessible(url):
      """
      As the name implies, this test is the 'inverse' of ``test_url_is_accessible``. Since the download servers are
      beyond our control, some files might not be accessible for longer stretches of time. Still, we want to know if they
      come back up, or if we need to remove the download functionality of the dataset for good.
  
      If you see this test failing, find the offending dataset in the parametrization and move it to
      ``test_url_is_accessible``.
      """
      assert_url_is_accessible(url)
  
imports: import contextlib
  import itertools
  import tempfile
  import time
  import traceback
  import unittest.mock
  import warnings
  from datetime import datetime
  from distutils import dir_util
  from os import path
  from urllib.error import HTTPError, URLError
  from urllib.parse import urlparse
  from urllib.request import Request, urlopen
  import pytest
  from torchvision import datasets
  from torchvision.datasets.utils import _get_redirect_url, USER_AGENT
label_desc: Use image node_id 36 for calling a global function with example usage: test_url_is_not_accessible(url) without return types