code: def test_index(
      method,
      sub,
      start,
      end,
      index_or_series,
      any_string_dtype,
      expected,
  ):
      obj = index_or_series(
          ["ABCDEFG", "BCDEFEF", "DEFGHIJEF", "EFGHEF"],
          dtype=any_string_dtype,
      )
      expected_dtype = (
          np.int64
          if any_string_dtype in object_pyarrow_numpy
          else "Int64"
      )
      expected = index_or_series(expected, dtype=expected_dtype)
  
      result = getattr(obj.str, method)(sub, start, end)
  
      if index_or_series is Series:
          tm.assert_series_equal(result, expected)
      else:
          tm.assert_index_equal(result, expected)
  
      # compare with standard library
      expected = [
          getattr(item, method)(sub, start, end) for item in obj
      ]
      assert list(result) == expected
  
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas import DataFrame, Index, MultiIndex, Series
  import pandas._testing
  from pandas.core.strings.accessor import StringMethods
  from pandas.tests.strings import object_pyarrow_numpy
label_desc: Use image node_id 16 for calling a global function with example usage: test_index(method, sub, start, end, index_or_series, any_string_dtype, expected) without return types