code: def test_get_loc_duplicates(self):
      index = Index([2, 2, 2, 2])
      result = index.get_loc(2)
      expected = slice(0, 4)
      assert result == expected
  
      index = Index(["c", "a", "a", "b", "b"])
      rs = index.get_loc("c")
      xp = 0
      assert rs == xp
  
      with pytest.raises(KeyError, match="2"):
          index.get_loc(2)
  
imports: from datetime import timedelta
  import re
  import numpy
  import pytest
  from pandas._libs import index
  from pandas.errors import InvalidIndexError, PerformanceWarning
  import pandas
  from pandas import Categorical, DataFrame, Index, MultiIndex, date_range
  import pandas._testing
label_desc: Use image node_id 2 for calling the TestGetLoc obj's underlying member method code with example usage: obj.test_get_loc_duplicates() without return types