code: def test_xs_with_duplicates(
      self, key, level, multiindex_dataframe_random_data
  ):
      # see GH#13719
      frame = multiindex_dataframe_random_data
      df = concat([frame] * 2)
      assert df.index.is_unique is False
      expected = concat([frame.xs("one", level="second")] * 2)
  
      if isinstance(key, list):
          result = df.xs(tuple(key), level=level)
      else:
          result = df.xs(key, level=level)
      tm.assert_frame_equal(result, expected)
  
imports: import re
  import numpy
  import pytest
  from pandas.errors import SettingWithCopyError
  from pandas import DataFrame, Index, IndexSlice, MultiIndex, Series, concat
  import pandas._testing
  from pandas.tseries.offsets import BDay
label_desc: Use image node_id 7 for calling the TestXSWithMultiIndex obj's underlying member method code with example usage: obj.test_xs_with_duplicates(key, level, multiindex_dataframe_random_data) without return types