Exception: ROM is missing for breakout

        python强化学习时可能会遇到环境模拟的异常

        env = gym.envs.make("Breakout-v0")

Exception                                 Traceback (most recent call last)
 in 
----> 1 env = gym.envs.make("Breakout-v0")

~/miniconda3/envs/lwhao-rl/lib/python3.9/site-packages/gym/envs/registration.py in make(id, **kwargs)
    143 
    144 def make(id, **kwargs):
--> 145     return registry.make(id, **kwargs)
    146 
    147 def spec(id):

~/miniconda3/envs/lwhao-rl/lib/python3.9/site-packages/gym/envs/registration.py in make(self, path, **kwargs)
     88             logger.info('Making new env: %s', path)
     89         spec = self.spec(path)
---> 90         env = spec.make(**kwargs)
     91         # We used to have people override _reset/_step rather than
     92         # reset/step. Set _gym_disable_underscore_compat = True on

~/miniconda3/envs/lwhao-rl/lib/python3.9/site-packages/gym/envs/registration.py in make(self, **kwargs)
     58         else:
     59             cls = load(self.entry_point)
---> 60             env = cls(**_kwargs)
     61 
     62         # Make the environment aware of which spec it came from.

~/miniconda3/envs/lwhao-rl/lib/python3.9/site-packages/gym/envs/atari/atari_env.py in __init__(self, game, mode, difficulty, obs_type, frameskip, repeat_action_probability, full_action_space)
     47 
     48         self.game = game
---> 49         self.game_path = atari_py.get_game_path(game)
     50         self.game_mode = mode
     51         self.game_difficulty = difficulty

~/miniconda3/envs/lwhao-rl/lib/python3.9/site-packages/atari_py/games.py in get_game_path(game_name)
     18     path = os.path.join(_games_dir, game_name) + ".bin"
     19     if not os.path.exists(path):
---> 20         raise Exception('ROM is missing for %s, see https://github.com/openai/atari-py#roms for instructions' % (game_name,))
     21     return path
     22 

        通过以下地址，下载Roms.rar

        http://www.atarimania.com/rom_collection_archive_atari_2600_roms.html

        将Roms.rar解压缩以后，运行命令，即可解决。

python -m atari_py.import_roms