code: def test_autodetect_tpu_accelerator_type_fails_gracefully():
      with patch("requests.get") as mock_get:
          mock_get.side_effect = requests.exceptions.RequestException
          assert (
              TPUAcceleratorManager.get_current_node_accelerator_type()
              is None
          )
  
imports: import os
  import sys
  import mock
  import pytest
  import requests
  from unittest.mock import patch
  import ray
  from ray._private.accelerators import TPUAcceleratorManager
  from ray._private.accelerators import tpu
label_desc: Use image node_id 8 for calling a global function with example usage: test_autodetect_tpu_accelerator_type_fails_gracefully() without return types