code: def test_sub(self):
      self.assertRaises(TypeError, lambda: self.psser - "x")
      self.assertRaises(TypeError, lambda: self.psser - 1)
  
      self.assert_eq(
          self.pser - self.some_timedelta,
          self.psser - self.some_timedelta,
      )
  
      pdf, psdf = self.pdf, self.psdf
      for col in self.df_cols:
          if col == "timedelta":
              self.assert_eq(
                  pdf["timedelta"] - pdf[col],
                  psdf["timedelta"] - psdf[col],
              )
          else:
              self.assertRaises(
                  TypeError, lambda: psdf["timedelta"] - psdf[col]
              )
  
      pdf, psdf = self.timedelta_pdf, self.timedelta_psdf
      self.assert_eq(
          pdf["that"] - pdf["this"], psdf["that"] - psdf["this"]
      )
  
imports: from datetime import timedelta
  import pandas
  from pandas.api.types import CategoricalDtype
  import pyspark.pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.pandas.tests.data_type_ops.testing_utils import OpsTestBase
label_desc: Use image node_id 7 for calling the TimedeltaOpsTestsMixin obj's underlying member method code with example usage: obj.test_sub() without return types