code: def test_nonzero_onedim(self):
      x = np.array([1, 0, 2, -1, 0, 0, 8])
      assert_equal(np.nonzero(x), ([0, 2, 3, 6],))
      assert_equal(x.nonzero(), ([0, 2, 3, 6],))
  
imports: import itertools
  from unittest import expectedFailure, skipIf
  import numpy
  import pytest
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, skipIfTorchDynamo, subtest, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 2 for calling the TestNonzero obj's underlying member method code with example usage: obj.test_nonzero_onedim() without return types