code: def test_loc_no_second_level_index(self):
      # GH#43599
      df = DataFrame(
          index=MultiIndex.from_product(
              [list("ab"), list("cd"), list("e")]
          ),
          columns=["Val"],
      )
      res = df.loc[np.s_[:, "c", :]]
      expected = DataFrame(
          index=MultiIndex.from_product([list("ab"), list("e")]),
          columns=["Val"],
      )
      tm.assert_frame_equal(res, expected)
  
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 21 for calling the TestMultiIndexLoc obj's underlying member method code with example usage: obj.test_loc_no_second_level_index() without return types