docstr: Set the action space of the environment
  
  :return: None
code: def action_space(self, val: Union[List[ActionSpace], ActionSpace]):
      """
      Set the action space of the environment
  
      :return: None
      """
      self._action_space = val
  
imports: import operator
  import time
  from collections import OrderedDict
  from typing import Union, List, Tuple, Dict
  import numpy
  from rl_coach import logger
  from rl_coach.base_parameters import Parameters
  from rl_coach.base_parameters import VisualizationParameters
  from rl_coach.core_types import GoalType, ActionType, EnvResponse, RunPhase
  from rl_coach.environments.environment_interface import EnvironmentInterface
  from rl_coach.logger import screen
  from rl_coach.renderer import Renderer
  from rl_coach.spaces import ActionSpace, ObservationSpace, DiscreteActionSpace, RewardSpace, StateSpace
  from rl_coach.utils import squeeze_list, force_list
label_desc: Use image node_id 3 for calling the Environment obj's underlying member method code with example usage: obj.action_space(val) without return types