Data Science Asked by Hermes Morales on April 6, 2021
I am a neophyte trying to learn and nowadays I am studying Raschka’s 3rd edition Python Machine Learning.
I am currently using Google Collaboratory and I am having an error when executing the gridworld_env.py file
Here is my code.
I have successfully found the method to execute it. I loaded it to the notebook environment:
and execute it with:
!python gridworld_env.py
but I am getting the following error:
Traceback (most recent call last):
File "gridworld_env.py", line 25, in <module>
from gym.envs.classic_control import rendering
File "/usr/local/lib/python3.6/dist-packages/gym/envs/classic_control/rendering.py", line 25, in
<module>
from pyglet.gl import *
File "/usr/local/lib/python3.6/dist-packages/pyglet/gl/__init__.py", line 244, in <module>
import pyglet.window
File "/usr/local/lib/python3.6/dist-packages/pyglet/window/__init__.py", line 1880, in <module>
gl._create_shadow_window()
File "/usr/local/lib/python3.6/dist-packages/pyglet/gl/__init__.py", line 220, in
_create_shadow_window
_shadow_window = Window(width=1, height=1, visible=False)
File "/usr/local/lib/python3.6/dist-packages/pyglet/window/xlib/__init__.py", line 165, in
__init__
super(XlibWindow, self).__init__(*args, **kwargs)
File "/usr/local/lib/python3.6/dist-packages/pyglet/window/__init__.py", line 570, in __init__
display = pyglet.canvas.get_display()
File "/usr/local/lib/python3.6/dist-packages/pyglet/canvas/__init__.py", line 94, in get_display
return Display()
File "/usr/local/lib/python3.6/dist-packages/pyglet/canvas/xlib.py", line 123, in __init__
raise NoSuchDisplayException('Cannot connect to "%s"' % name)
pyglet.canvas.xlib.NoSuchDisplayException: Cannot connect to "None"
I have searched in the web but until now I have not been able to find how to fix it. Thanks if anybody can send me a tip for solving it.
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