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ImportError: Library "GL" not found

See original GitHub issue

Hi, I get the following error when trying to run DQN baseline. I have opengl already installed. and glxgears, glxinfo already work fine. I am using python 3.5. can someone please let me know how to fix this?

“python -m baselines.deepq.experiments.enjoy_cartpole” gym.utils.reraise.ReraisedException: Error occured while running from pyglet.gl import * The original exception was:

ImportError: Library “GL” not found.

Issue Analytics

State:
Created 6 years ago
Reactions:4
Comments:5 (1 by maintainers)

Top GitHub Comments

2reactions

ziyanglicommented, Mar 19, 2019

I have the same problem. I tried this and no error occurs.

Python 3.6.3 (default, Oct  6 2017, 00:00:00) 
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyglet.gl import *
>>> gl_lib = pyglet.lib.load_library('GL')
>>> 
>>>

But if I run

python -m baselines.run --alg=deepq --env=CartPole-v0 --load_path=./cartpole_model.pkl --num_timesteps=0 --play

then there is a problem

Instructions for updating:
Use tf.cast instead.
Loaded model from ./cartpole_model.pkl
Running trained model
Traceback (most recent call last):
  File "/home/lzy/git/gym/gym/envs/classic_control/rendering.py", line 27, in <module>
    from pyglet.gl import *
  File "/home/lzy/py3_ws/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 100, in <module>
    from pyglet.gl.lib import GLException
  File "/home/lzy/py3_ws/lib/python3.6/site-packages/pyglet/gl/lib.py", line 143, in <module>
    from pyglet.gl.lib_glx import link_GL, link_GLU, link_GLX
  File "/home/lzy/py3_ws/lib/python3.6/site-packages/pyglet/gl/lib_glx.py", line 50, in <module>
    gl_lib = pyglet.lib.load_library('GL')
  File "/home/lzy/py3_ws/lib/python3.6/site-packages/pyglet/lib.py", line 158, in load_library
    raise ImportError('Library "%s" not found.' % names[0])
ImportError: Library "GL" not found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/lzy/git/baselines/baselines/run.py", line 252, in <module>
    main(sys.argv)
  File "/home/lzy/git/baselines/baselines/run.py", line 239, in main
    env.render()
  File "/home/lzy/git/baselines/baselines/common/vec_env/dummy_vec_env.py", line 79, in render
    return self.envs[0].render(mode=mode)
  File "/home/lzy/git/gym/gym/core.py", line 244, in render
    return self.env.render(mode, **kwargs)
  File "/home/lzy/git/gym/gym/core.py", line 244, in render
    return self.env.render(mode, **kwargs)
  File "/home/lzy/git/gym/gym/envs/classic_control/cartpole.py", line 150, in render
    from gym.envs.classic_control import rendering
  File "/home/lzy/git/gym/gym/envs/classic_control/rendering.py", line 34, in <module>
    ''')
ImportError: 
    Error occured while running `from pyglet.gl import *`
    HINT: make sure you have OpenGL install. 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>'

1reaction

ariel415elcommented, Jun 3, 2020

Thanks @Deastan ! adding from pyglet.gl import * in the main scriipt did the trick for me