code: def test_simple(self):
      class dt:
          dtype = np.dtype("f8")
  
      assert np.dtype(dt) == np.float64
      assert np.dtype(dt()) == np.float64
  
imports: import functools
  import operator
  import pickle
  import sys
  import types
  from itertools import permutations
  from typing import Any
  from unittest import skipIf
  import pytest
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, subtest, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
  import numpy
label_desc: Use image node_id 1 for calling the TestFromDTypeAttribute obj's underlying member method code with example usage: obj.test_simple() without return types