code: import numpy as np
  
  from pandas import DataFrame, Series
  import pandas._testing as tm
  from pandas.tests.io.pytables.common import ensure_clean_path
  
  from pandas.io.pytables import HDFStore, read_hdf
  
  
  class TestHDFStoreSubclass:
      # GH 33748
      def test_supported_for_subclass_dataframe(self):
          data = {"a": [1, 2], "b": [3, 4]}
          sdf = tm.SubclassedDataFrame(data, dtype=np.intp)
  
          expected = DataFrame(data, dtype=np.intp)
  
          with ensure_clean_path("temp.h5") as path:
              sdf.to_hdf(path, "df")
              result = read_hdf(path, "df")
              tm.assert_frame_equal(result, expected)
  
          with ensure_clean_path("temp.h5") as path:
              with HDFStore(path) as store:
                  store.put("df", sdf)
              result = read_hdf(path, "df")
              tm.assert_frame_equal(result, expected)
  
      def test_supported_for_subclass_series(self):
          data = [1, 2, 3]
          sser = tm.SubclassedSeries(data, dtype=np.intp)
  
          expected = Series(data, dtype=np.intp)
  
          with ensure_clean_path("temp.h5") as path:
              sser.to_hdf(path, "ser")
              result = read_hdf(path, "ser")
              tm.assert_series_equal(result, expected)
  
          with ensure_clean_path("temp.h5") as path:
              with HDFStore(path) as store:
                  store.put("ser", sser)
              result = read_hdf(path, "ser")
              tm.assert_series_equal(result, expected)
  