code: def test_loc_getitem_scalar_non_category(self, df):
      with pytest.raises(KeyError, match="^1$"):
          df.loc[1]
  
imports: import re
  import numpy
  import pytest
  import pandas.util._test_decorators
  import pandas
  from pandas import Categorical, CategoricalDtype, CategoricalIndex, DataFrame, Index, Interval, Series, Timedelta, Timestamp, option_context
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestCategoricalIndex obj's underlying member method code with example usage: obj.test_loc_getitem_scalar_non_category(df) without return types