code: def test_preserve_getitem(self):
      df = pd.DataFrame({"A": [1, 2]}).set_flags(
          allows_duplicate_labels=False
      )
      assert df[["A"]].flags.allows_duplicate_labels is False
      assert df["A"].flags.allows_duplicate_labels is False
      assert df.loc[0].flags.allows_duplicate_labels is False
      assert df.loc[[0]].flags.allows_duplicate_labels is False
      assert df.loc[0, ["A"]].flags.allows_duplicate_labels is False
  
imports: import operator
  import numpy
  import pytest
  import pandas
  import pandas._testing
label_desc: Use image node_id 7 for calling the TestPreserves obj's underlying member method code with example usage: obj.test_preserve_getitem() without return types