"Library "GLU" not found" while using openaAI gym

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Amit Jena

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Aug 31, 2021, 7:33:38 PM8/31/21

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Hello,

I am using Ubuntu 18.04 to evaluate this simple block of code on python.

############################

import gym

env = gym.make('CartPole-v0')
env.reset()
for _ in range(1000):
env.render()
env.step(env.action_space.sample()) # take a random action
env.close()

##############################

I am getting this error

Traceback (most recent call last):

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/gym/envs/classic_control/rendering.py", line 27, in <module>

from pyglet.gl import *

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/pyglet/gl/__init__.py", line 95, in <module>

from pyglet.gl.lib import GLException

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/pyglet/gl/lib.py", line 149, in <module>

from pyglet.gl.lib_glx import link_GL, link_GLU, link_GLX

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/pyglet/gl/lib_glx.py", line 46, in <module>

glu_lib = pyglet.lib.load_library('GLU')

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/pyglet/lib.py", line 164, in load_library

raise ImportError('Library "%s" not found.' % names[0])

ImportError: Library "GLU" not found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/mujoco_expts/main.py", line 30, in <module>

env.render()

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/gym/core.py", line 254, in render

return self.env.render(mode, **kwargs)

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/gym/envs/classic_control/cartpole.py", line 179, in render

from gym.envs.classic_control import rendering

File "/home/grads/a/Desktop/python/codes/mujoco_experiments/4mujoco/lib/python3.8/site-packages/gym/envs/classic_control/rendering.py", line 29, in <module>

raise ImportError(

ImportError:

Error occurred while running `from pyglet.gl import *`

HINT: make sure you have OpenGL installed. On Ubuntu, you can run 'apt-get install python-opengl'.

If you're running on a server, you may need a virtual frame buffer; something like this should work:

'xvfb-run -s "-screen 0 1400x900x24" python <your_script.py>'

I tried installing "freeglut3-dev" ( as advised by https://stackoverflow.com/questions/50446867/importerror-library-glu-not-found/52886029) and python-opengl, but the the error still persists.