code: def test_regression_1(self):
      # ticket #1196
      a = np.arange(2)
      assert_equal(a[:-1], a[s_[:-1]])
      assert_equal(a[:-1], a[index_exp[:-1]])
  
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 1 for calling the TestIndexExpression obj's underlying member method code with example usage: obj.test_regression_1() without return types