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_date).apply(lambda x: x.days),
          self.psser - self.some_date,
      )
      pdf, psdf = self.pdf, self.psdf
      for col in self.df_cols:
          if col == "date":
              self.assert_eq(
                  (pdf["date"] - pdf[col]).apply(lambda x: x.days),
                  psdf["date"] - psdf[col],
              )
          else:
              self.assertRaises(
                  TypeError, lambda: psdf["date"] - psdf[col]
              )
      pdf, psdf = self.date_pdf, self.date_psdf
      self.assert_eq(
          (pdf["this"] - pdf["that"]).apply(lambda x: x.days),
          psdf["this"] - psdf["that"],
      )
  
imports: import datetime
  import pandas
  from pandas.api.types import CategoricalDtype
  from pyspark import 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 DateOpsTestsMixin obj's underlying member method code with example usage: obj.test_sub() without return types