code: def test_dunder_dlpack_refcount(self):
      x = np.arange(5)
      y = x.__dlpack__()
      assert sys.getrefcount(x) == 3
      del y
      assert sys.getrefcount(x) == 2
  
imports: import functools
  import sys
  from unittest import skipIf
  import numpy
  import pytest
  import torch
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 1 for calling the TestDLPack obj's underlying member method code with example usage: obj.test_dunder_dlpack_refcount() without return types