code: def test_simple_1(self):
      a = np.random.rand(4, 5, 6)
  
      assert_equal(a[:, :3, [1, 2]], a[index_exp[:, :3, [1, 2]]])
      assert_equal(a[:, :3, [1, 2]], a[s_[:, :3, [1, 2]]])
  
imports: import functools
  from unittest import expectedFailure, skipIf
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 2 for calling the TestIndexExpression obj's underlying member method code with example usage: obj.test_simple_1() without return types