OpenAI Gym ProcGen - Getting Action Meanings

题意：OpenAI Gym ProcGen - 获取动作含义

问题背景：

In the OpenAI ProcGen gym, I am not getting a way to get the meanings of the action values, I can see that there are 15 actions for the coinrun environment using env.action_space.n. I have tried both the Gym and the Gym3 versions.

在 OpenAI ProcGen gym 中，我无法找到获取动作值含义的方法。我可以看到使用 env.action_space.n 在 coinrun 环境中存在 15 个动作。我已经尝试过 Gym 和 Gym3 两个版本。

This is how I make the environment (gym version).

这是我如何创建环境（gym 版本）的。

env = gym.make('procgen:procgen-%s-v0'%('coinrun'))

Neither of these are working to seem to work.

这两个似乎都不起作用。

env.action_spec()
env.env.get_action_meanings()

I have tried to change env with env.env and env.env.env, nothing works. I get the message: AttributeError: 'ToGymEnv' object has no attribute 'get_action_meanings'.

我尝试用 env.env 和 env.env.env 来替换 env，但都没有成功。我收到了这样的错误消息：AttributeError: 'ToGymEnv' object has no attribute 'get_action_meanings'。

Please tell me how I can get the labelled action list.

请告诉我怎样获取带标签的动作列表

Object Types: env is a ToGymEnv object, env.env is , and env.env.env is ProcgenGym3Env.

对象类型：env 是一个 ToGymEnv 对象，env.env 的类型未明确给出，而 env.env.env 是一个 ProcgenGym3Env 对象。

问题解决：

The action meanings are hidden in the get_combos method in the procgen.env.

动作的含义隐藏在 procgen.env 中的 get_combos 方法里

def get_combos(self):
    return [
        ("LEFT", "DOWN"),
        ("LEFT",),
        ("LEFT", "UP"),
        ("DOWN",),
        (),
        ("UP",),
        ("RIGHT", "DOWN"),
        ("RIGHT",),
        ("RIGHT", "UP"),
        ("D",),
        ("A",),
        ("W",),
        ("S",),
        ("Q",),
        ("E",),
    ]

To access them from an environment created in gym (procgen==0.10.4) you can use:

在通过 gym 创建的环境（procgen 版本为 0.10.4）中访问它们，你可以使用：

env = gym.make('procgen:procgen-%s-v0'%('coinrun'))
print(env.unwrapped.env.env.combos)

Which will result in:        

这将导致：

[('LEFT', 'DOWN'), ('LEFT',), ('LEFT', 'UP'), ('DOWN',), (), ('UP',), ('RIGHT', 'DOWN'), ('RIGHT',), ('RIGHT', 'UP'), ('D',), ('A',), ('W',), ('S',), ('Q',), ('E',)]

In order to acces them from a ProcgenEnv use:

为了从 ProcgenEnv 访问它们，请使用：

env = procgen.ProcgenEnv(env_name='maze', num_envs=1)
print(env.env.combos)