在 windows 上的 python 中使用健身房 atari（版本 0.9.5）

Question

我试图在 0.9.5 版上安装gym atari package（我特别需要这个版本），但是当我运行代码时（如果正确下载了gym，它应该可以顺利运行），我收到以下错误：

AttributeError: 'AtariEnv' object has no attribute 'viewer'

当我尝试运行gym.make()时出现问题。

有谁知道如何解决这一问题？

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我在 python 3.9 上发生了同样的行为，但由于某种原因不在 python 3.8 上（那里有一个不同的错误）。 也许我错过了一些渲染库？

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完整的错误信息是：

[2021-05-22 02:17:05,405] Making new env: PongNoFrameskip-v4
C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\registration.py:17: PkgResourcesDeprecationWarning: Parameters to load are deprecated.  Call .resolve and .require separately.
  result = entry_point.load(False)
Traceback (most recent call last):
  File "C:/Users/1/PycharmProjects/University Homework/Reinforcement Learning/dqn/main.py", line 61, in <module>
    env = get_env(task, seed)
  File "C:\Users\1\PycharmProjects\University Homework\Reinforcement Learning\dqn\utils\gym.py", line 13, in get_env
    env = gym.make(env_id)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\registration.py", line 164, in make
    return registry.make(id)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\registration.py", line 122, in make
    env = spec.make()
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\registration.py", line 89, in make
    env = cls(**self._kwargs)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\atari\atari_env.py", line 32, in __init__
    self.game_path = atari_py.get_game_path(game)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\atari_py\games.py", line 20, in get_game_path
    raise Exception('ROM is missing for %s, see https://github.com/openai/atari-py#roms for instructions' % (game_name,))
Exception: ROM is missing for pong, see https://github.com/openai/atari-py#roms for instructions
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\utils\closer.py", line 67, in close
    closeable.close()
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\core.py", line 164, in close
    self.render(close=True)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\core.py", line 150, in render
    return self._render(mode=mode, close=close)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\atari\atari_env.py", line 109, in _render
    if self.viewer is not None:
AttributeError: 'AtariEnv' object has no attribute 'viewer'
Exception ignored in: <function Env.__del__ at 0x00000203EE2174C8>
Traceback (most recent call last):
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\core.py", line 203, in __del__
    self.close()
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\core.py", line 164, in close
    self.render(close=True)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\core.py", line 150, in render
    return self._render(mode=mode, close=close)
  File "C:\Users\1\PycharmProjects\University Homework\venv37\lib\site-packages\gym\envs\atari\atari_env.py", line 109, in _render
    if self.viewer is not None:
AttributeError: 'AtariEnv' object has no attribute 'viewer'

另外，相关代码：

if __name__ == '__main__':
    # Get Atari games.
    benchmark = gym.benchmark_spec('Atari40M')
    
    # Change the index to select a different game.
    task = benchmark.tasks[3]
    
    # Run training
    seed = 0 # Use a seed of zero (you may want to randomize the seed!)
    env = get_env(task, seed)

get_env是：

def get_env(task, seed):
    env_id = task.env_id

    env = gym.make(env_id)

    set_global_seeds(seed)
    env.seed(seed)

    expt_dir = 'tmp/gym-results'
    env = wrappers.Monitor(env, expt_dir, force=True)
    env = wrap_deepmind(env)

    return env

Answer 1

该错误看起来像是找不到用于 pong 的 Atari ROM。 这可能是因为由于许可问题，gym 不再自动安装 ROM。

但是现在有一个简单的解决方法：

pip install -U gym
pip install -U gym[atari,accept-rom-license]

accept-rom-license选项安装一个名为autorom的 package，它提供AutoROM命令，并使用--accept-rom-license选项自动运行它。

然后一切正常。

细节：

如果您在没有--accept-license选项的情况下运行AutoROM ，这就是您所得到的，因此请注意：

AutoROM will download the Atari 2600 ROMs.
They will be installed to:
    [...]/site-packages/AutoROM/roms

Existing ROMs will be overwritten.

I own a license to these Atari 2600 ROMs.
I agree to not distribute these ROMs and wish to proceed: [Y/n]:

运行AutoROM --help以获得更多选项。