code: def test_getitem_dupe_cols(self):
      df = DataFrame([[1, 2, 3], [4, 5, 6]], columns=["a", "a", "b"])
      msg = "\"None of [Index(['baf'], dtype="
      with pytest.raises(KeyError, match=re.escape(msg)):
          df[["baf"]]
  
imports: import re
  import numpy
  import pytest
  from pandas import Categorical, CategoricalDtype, CategoricalIndex, DataFrame, DateOffset, DatetimeIndex, Index, MultiIndex, Series, Timestamp, concat, date_range, get_dummies, period_range
  import pandas._testing
  from pandas.core.arrays import SparseArray
label_desc: Use image node_id 3 for calling the TestGetitemListLike obj's underlying member method code with example usage: obj.test_getitem_dupe_cols() without return types