code: def test_missing_key_raises_keyerror2(self):
      # GH#21168 KeyError, not "IndexingError: Too many indexers"
      ser = Series(-1, index=MultiIndex.from_product([[0, 1]] * 2))
  
      with pytest.raises(KeyError, match=r"\(0, 3\)"):
          ser.loc[0, 3]
  
imports: import numpy
  import pytest
  from pandas.errors import IndexingError, PerformanceWarning
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series
  import pandas._testing
label_desc: Use image node_id 2 for calling the TestKeyErrorsWithMultiIndex obj's underlying member method code with example usage: obj.test_missing_key_raises_keyerror2() without return types