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 pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_raises_regex
  from numpy.lib.index_tricks import mgrid, ogrid, ndenumerate, fill_diagonal, diag_indices, diag_indices_from, index_exp, ndindex, r_, s_, ix_
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