name 'glPushMatrix' is not defined ·

02 Dec 2023, 00:00

Try to run a test code for stable baselines gym

import gym from stable_baselines3 import A2C env = gym.make("CartPole-v1") model = A2C("MlpPolicy", env, verbose=1) model.learn(total_timesteps=10_000) obs = env.reset() for i in range(100): action, _state = model.predict(obs, deterministic=True) obs, reward, done, info = env.step(action) env.render() if done: obs = env.reset() 

found the error "NameError: name 'glPushMatrix' is not defined"

Traceback (most recent call last): File "test_cart_pole.py", line 14, in <module> env.render() File "/Users/xxx/opt/anaconda3/lib/python3.8/site-packages/gym/core.py", line 295, in render return self.env.render(mode, **kwargs) File "/Users/xxx/opt/anaconda3/lib/python3.8/site-packages/gym/envs/classic_control/cartpole.py", line 229, in render return self.viewer.render(return_rgb_array=mode == "rgb_array") File "/Users/xxx/opt/anaconda3/lib/python3.8/site-packages/gym/envs/classic_control/rendering.py", line 126, in render self.transform.enable() File "/Users/xxx/opt/anaconda3/lib/python3.8/site-packages/gym/envs/classic_control/rendering.py", line 232, in enable glPushMatrix() NameError: name 'glPushMatrix' is not defined 

I tried "pip install PyOpenGL PyOpenGL_accelerate", which didn't help also uninstall pyglet and install again , did't work too Any Idea???

1 Answer

Just had the same problem. Fixed it by installing an older version of pyglet:

$ pip install pyglet==1.5.27 

I don't know if this is the latest version that avoids the problem, but it works.

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