python-3.x - 如何解决 OpenAI Gym 中的 "Env not found"错误？

Question

我正在使用安装在 Mac 上的健身房版本 - '0.9.7' 和 mujoco_py 版本 1.50.1.41、Python 3.6.1 |Anaconda 4.4.0。

尝试时:

import gym
env = gym.make('Humanoid-v1')

我收到以下错误:

Traceback (most recent call last):
  File "/Users/usr/gym/gym/envs/registration.py", line 139, in spec
    return self.env_specs[id]
KeyError: 'Humanoid-v1'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/usr/gym/gym/envs/registration.py", line 163, in make
    return registry.make(id)
  File "/Users/usr/gym/gym/envs/registration.py", line 118, in make
    spec = self.spec(id)
  File "/Users/usr/gym/gym/envs/registration.py", line 147, in spec
    raise error.DeprecatedEnv('Env {} not found (valid versions include {})'.format(id, matching_envs))
gym.error.DeprecatedEnv: Env Humanoid-v1 not found (valid versions include ['Humanoid-v2'])

我曾尝试在网上寻找解决方案，但没有成功。

Answer 1

更新日志 gym's front page提到以下内容:

2018-01-24: All continuous control environments now use mujoco_py >= 1.50. Versions have been updated accordingly to -v2, e.g. HalfCheetah-v2. Performance should be similar (see https://github.com/openai/gym/pull/834) but there are likely some differences due to changes in MuJoCo.

因此，如果您使用的是该日期或之后的健身房版本，则必须使用

env = gym.make('Humanoid-v2')

而不是 v1 .如果您真的特别想要版本 1(例如，用于在该版本上重现以前的实验)，那么您似乎必须安装旧版本的健身房和 mujoco。