code: def pdf2(self):
      return pd.DataFrame(
          {
              "a": [9, 8, 7, 6, 5, 4, 3, 2, 1],
              "b": [0, 0, 0, 4, 5, 6, 1, 2, 3],
          },
          index=list(range(9)),
      )
  
imports: import pandas
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
  from pyspark.pandas.typedef.typehints import extension_float_dtypes_available
label_desc: Use image node_id 4 for calling the ArithmeticChainMixin obj's underlying member method code with example usage: obj.pdf2() and returns: pd