docs: def delete_feature_base(dbpath, set_object, name):
      """
      Generic function which deletes a feature from a database
  
      Parameters
      ----------
      dbpath : string, path to SQLite database file
      set_object : object (either TestSet or TrainSet) which is stored in the database
      name : string, name of the feature to be deleted
  
      Returns
      -------
      None
      """
      engine = create_engine('sqlite:////' + dbpath)
      session_cl = sessionmaker(bind=engine)
      session = session_cl()
      tmp_object = session.query(set_object).get(1)
      if tmp_object.features is not None and name in tmp_object.features:
          for i in session.query(set_object).order_by(set_object.id):
              del i.features[name]
      session.commit()
      session.close()
      return None