code: def test_attrs(self):
      df = DataFrame({"A": [2, 3]})
      assert df.attrs == {}
      df.attrs["version"] = 1
  
      result = df.rename(columns=str)
      assert result.attrs == {"version": 1}
  
imports: from copy import deepcopy
  import inspect
  import pydoc
  import numpy
  import pytest
  from pandas._config import using_pyarrow_string_dtype
  from pandas._config.config import option_context
  import pandas
  from pandas import DataFrame, Series, date_range, timedelta_range
  import pandas._testing
label_desc: Use image node_id 21 for calling the TestDataFrameMisc obj's underlying member method code with example usage: obj.test_attrs() without return types