docs: def return_feature_list_base(dbpath, set_object):
      """
      Generic function which returns a list of the names of all available features
  
      Parameters
      ----------
      dbpath : string, path to SQLite database file
      set_object : object (either TestSet or TrainSet) which is stored in the database
  
      Returns
      -------
      return_list : list of strings corresponding to all available features
      """
      engine = create_engine('sqlite:////' + dbpath)
      session_cl = sessionmaker(bind=engine)
      session = session_cl()
      return_list = []
      tmp_object = session.query(set_object).get(1)
      for feature in tmp_object.features:
          return_list.append(feature)
      session.close()
      return return_list