How to use the gfootball.env.football_action_set.named_action_from_action_set function in gfootball

def flip_single_action(action, config):
  """Actions corresponding to the field rotated by 180 degrees."""
  action = football_action_set.named_action_from_action_set(
      football_action_set.get_action_set(config), action)
  if action == football_action_set.action_left:
    return football_action_set.action_right
  if action == football_action_set.action_top_left:
    return football_action_set.action_bottom_right
  if action == football_action_set.action_top:
    return football_action_set.action_bottom
  if action == football_action_set.action_top_right:
    return football_action_set.action_bottom_left
  if action == football_action_set.action_right:
    return football_action_set.action_left
  if action == football_action_set.action_bottom_right:
    return football_action_set.action_top_left
  if action == football_action_set.action_bottom:
    return football_action_set.action_top
  if action == football_action_set.action_bottom_left:

def step(self, action, extra_data={}):
    assert self._env.state != GameState.game_done, (
        'Cant call step() once episode finished (call reset() instead)')
    assert self._env.state == GameState.game_running, (
        'reset() must be called before step()')
    action = [
        football_action_set.named_action_from_action_set(self._action_set, a)
        for a in action
    ]
    self._step_count += 1
    # If agent 'holds' the game for too long, just start it.
    if self._env.waiting_for_game_count > 20:
      self._env.waiting_for_game_count = 0
      action = [football_action_set.action_short_pass] * (
          self._env.config.left_agents + self._env.config.right_agents)

    assert len(action) == (
        self._env.config.left_agents + self._env.config.right_agents)
    debug = {}
    debug['action'] = action
    action_index = 0
    for i in range(self._env.config.left_agents):
      player_action = action[action_index]

def step(self, action, extra_data={}):
    if self._env_state != 'game_started':
      raise RuntimeError('invalid game state: {}'.format(self._env_state))
    action = [
        football_action_set.named_action_from_action_set(self._action_set, a)
        for a in action
    ]
    self._step_count += 1
    observation, reward, done, debug = self._env.step(action)
    debug['time'] = timeit.default_timer()
    debug.update(extra_data)
    self._cumulative_reward += reward
    single_observation = copy.deepcopy(observation)
    trace = {
        'debug': debug,
        'observation': single_observation,
        'reward': reward,
        'cumulative_reward': self._cumulative_reward
    }
    self._trace.update(trace)
    if done: