docs: def dump_feature_base(dbpath, set_object, points_amt, feature_name, feature, force_extraction=True):
      """
      Generic function which dumps a list of lists or ndarray of features into database (allows to
      copy features from a pre-existing .txt/.csv/.whatever file, for example)
  
      Parameters
      ----------
      dbpath : string, path to SQLite database file
      set_object : object (either TestSet or TrainSet) which is stored in the database
      points_amt : int, number of data points in the database
      feature : list of lists or ndarray, contains the data to be written to the database
      force_extraction : boolean, if True - will overwrite any existing feature with this name
      default value: False
  
      Returns
      -------
      None
      """
      engine = create_engine('sqlite:////' + dbpath)
      session_cl = sessionmaker(bind=engine)
      session = session_cl()
      a = 0
  
      tmp_object = session.query(set_object).get(1)
      if type(feature) is np.ndarray:
          if feature.shape[0] != points_amt:
              raise errors.WrongSize(feature_name)
          else:
              if tmp_object.features is None:
                  for i in session.query(set_object).order_by(set_object.id):
                      i.features = {feature_name: feature_name[a, :]}
                      a += 1
              elif (feature_name not in tmp_object.features) or force_extraction is True:
                  for i in session.query(set_object).order_by(set_object.id):
                      i.features[feature_name] = feature_name[a, :]
                      a += 1
      else:
          if len(feature) != points_amt:
              raise errors.WrongSize(feature_name)
          else:
              if tmp_object.features is None:
                  for i in session.query(set_object).order_by(set_object.id):
                      i.features = {feature_name: feature_name[a]}
                      a += 1
              elif (feature_name not in tmp_object.features) or force_extraction is True:
                  for i in session.query(set_object).order_by(set_object.id):
                      i.features[feature_name] = feature_name[a]
                      a += 1
      session.commit()
      session.close()
      return None