code: def test_setting_with_copy_bug_no_warning(self):
      # invalid warning as we are returning a new object
      # GH 8730
      df1 = DataFrame(
          {"x": Series(["a", "b", "c"]), "y": Series(["d", "e", "f"])}
      )
      df2 = df1[["x"]]
  
      # this should not raise
      df2["y"] = ["g", "h", "i"]
  
imports: from string import ascii_letters
  import numpy
  import pytest
  from pandas.errors import SettingWithCopyError, SettingWithCopyWarning
  import pandas
  from pandas import DataFrame, Index, Series, Timestamp, date_range, option_context
  import pandas._testing
label_desc: Use image node_id 18 for calling the TestChaining obj's underlying member method code with example usage: obj.test_setting_with_copy_bug_no_warning() without return types