code: def test_intersection_base(self, sort):
      # (same results for py2 and py3 but sortedness not tested elsewhere)
      index = Index([0, "a", 1, "b", 2, "c"])
      first = index[:5]
      second = index[:3]
  
      expected = (
          Index([0, 1, "a"]) if sort is None else Index([0, "a", 1])
      )
      result = first.intersection(second, sort=sort)
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime
  import numpy
  import pytest
  import pandas
  from pandas import Index, Series
  import pandas._testing
  from pandas.core.algorithms import safe_sort
label_desc: Use image node_id 8 for calling the TestIndexSetOps obj's underlying member method code with example usage: obj.test_intersection_base(sort) without return types