enable_render

[jekahamster]

I see you provide the option to disable rendering, which is useful when working with Jupyter notebooks. However, if you try to do that, you will find that there is a serious bug in the code that prevents this feature:

import gym_maze
gym.envs.registration.register(
    id="maze-sample-5x5-v0-no-render",
    entry_point="gym_maze.envs:MazeEnvSample5x5",
    max_episode_steps=2000,
    kwargs={
        "enable_render": False
    }
)
env = gym.make("maze-sample-5x5-v0-no-render")
obs, info = env.reset()
img = env.render(mode="rgb_array")     # AttributeError: 'MazeView2D' object has no attribute 'screen'

The issue is that you create the 'screen' field only when 'enable_render' is set to 'True,' but the '__view_update(self, mode)' method is called at all times, and it uses the 'screen' field internally.

Path: gym_maze > envs > MazeView2D > init

Path: gym_maze > envs > MazeView2D > __view_update

Path: gym_maze > envs > MazeView2D > update

[JupiLogy]

Hey, I've made a pull request but since this repo is basically inactive it is unlikely to get accepted. However, the code with the fix is available on my profile. Good luck!