code: def test_device_get_pci_bus_id(self):
      d = cuda.Device()
      pci_bus_id = d.pci_bus_id
      assert re.match(
          "^[a-fA-F0-9]{4}:[a-fA-F0-9]{2}:[a-fA-F0-9]{2}.[a-fA-F0-9]",
          pci_bus_id,
      )
  
imports: import re
  import threading
  import unittest
  import pytest
  import cupy
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestDevicePCIBusId obj's underlying member method code with example usage: obj.test_device_get_pci_bus_id() without return types