code: def test_loc_multiindex_labels(self):
      df = DataFrame(
          np.random.default_rng(2).standard_normal((3, 3)),
          columns=[["i", "i", "j"], ["A", "A", "B"]],
          index=[["i", "i", "j"], ["X", "X", "Y"]],
      )
  
      # the first 2 rows
      expected = df.iloc[[0, 1]].droplevel(0)
      result = df.loc["i"]
      tm.assert_frame_equal(result, expected)
  
      # 2nd (last) column
      expected = df.iloc[:, [2]].droplevel(0, axis=1)
      result = df.loc[:, "j"]
      tm.assert_frame_equal(result, expected)
  
      # bottom right corner
      expected = df.iloc[[2], [2]].droplevel(0).droplevel(0, axis=1)
      result = df.loc["j"].loc[:, "j"]
      tm.assert_frame_equal(result, expected)
  
      # with a tuple
      expected = df.iloc[[0, 1]]
      result = df.loc[("i", "X")]
      tm.assert_frame_equal(result, 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 7 for calling the TestMultiIndexLoc obj's underlying member method code with example usage: obj.test_loc_multiindex_labels() without return types