python - OpenAI "gym"库在 env.render() 上引发 NoneType 错误

Question

这是我第一次使用机器学习库，我以前都是自己做的，当我做的时候它起作用了，但我想当每个人都告诉你不要自己做这项工作并让库来做的时候你，你最终尝试了，我在Python上尝试了OpenAI的“gym”，我的代码非常简单(我在一个youtube视频上找到了它，它解释了如何使用这个库，因为我不知道我要做什么)

    import gym

env = gym.make("MountainCar-v0")
env.reset()

done = False

while not done:
    action = 2
    newState, reward, done, _ = env.step(action)
    env.render()

env.close()

这段代码返回给我这个错误:

Traceback (most recent call last): File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet__init__.py", line 378, in getattr return getattr(self._module, name) AttributeError: 'NoneType' object has no attribute 'get_default'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "C:/Users/user/PycharmProjects/TestOnGymLibrary/me/RoeeHerzovich/TestOnGymLibrary

/Core.py", line 11, in env.render() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\gym\core.py", line 235, in render return self.env.render(mode, **kwargs) File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\gym\envs\classic_control\mountain_car.py", line 78, in render from gym.envs.classic_control import rendering File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\gym\envs\classic_control\rendering.py", line 27, in from pyglet.gl import * File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\gl__init__.py", line 239, in import pyglet.window File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\window__init__.py", line 1896, in gl._create_shadow_window() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\gl__init__.py", line 208, in _create_shadow_window _shadow_window = Window(width=1, height=1, visible=False) File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\window\win32__init__.py", line 134, in init super(Win32Window, self).init(*args, **kwargs) File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\window__init__.py", line 501, in init display = get_platform().get_default_display() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\window__init__.py", line 1845, in get_default_display return pyglet.canvas.get_display() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\canvas__init__.py", line 77, in get_display from pyglet.app import displays File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\app__init__.py", line 175, in event_loop = EventLoop() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\app\base.py", line 119, in init self.clock = clock.get_default() File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet__init__.py", line 384, in getattr import(import_name) File "C:\Users\user\PycharmProjects\TestOnGymLibrary\venv\lib\site-packages\pyglet\clock.py", line 166, in _default_time_function = time.clock AttributeError: module 'time' has no attribute 'clock'

我尝试在一些地方寻找这个，但我还没有看到......我安装了gym、matplotlib和pyglet，我检查了它们，甚至尝试--升级它们，它说它已经升级了，所以我不知道发生了什么。有人可以帮我吗？

感谢您的所有评论:)

Answer 1

真正的错误来自您发布的跟踪的底部:

_default_time_function = time.clock AttributeError:模块“时间”没有属性“时钟”

此错误已得到解决 here .

选项:

找到 time.clock() 被调用的地方，并将其更改为 time.perf_counter()

降级至3.7