1.背景介绍
今天使用租的云服务器跑强化学习代码，遇到了问题ImportError: Library “GLU” not found。
Traceback (most recent call last): File "/root/miniconda3/lib/python3.8/site-packages/gym/envs/classic_control/rendering.py", line 27, in <module> from pyglet.gl import * File "/root/miniconda3/lib/python3.8/site-packages/pyglet/gl/__init__.py", line 95, in <module> from pyglet.gl.gl import * File "/root/miniconda3/lib/python3.8/site-packages/pyglet/gl/gl.py", line 45, in <module> from pyglet.gl.lib import link_GL as _link_function File "/root/miniconda3/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 "/root/miniconda3/lib/python3.8/site-packages/pyglet/gl/lib_glx.py", line 46, in <module> glu_lib = pyglet.lib.load_library('GLU') File "/root/miniconda3/lib/python3.8/site-packages/pyglet/lib.py", line 168, 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 "TrainMaze.py", line 2, in <module> from MazeEnv import Maze File "/home/my-mcpg/MazeEnv.py", line 5, in <module> from gym.envs.classic_control import rendering File "/root/miniconda3/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>'
2.解决方案
报错提示中有一个提示信息：
HINT: make sure you have OpenGL installed. On Ubuntu, you can run 'apt-get install python-opengl'.
意思就是说确保安装了OpenGL库，在Ubuntu中，可以通过apt-get install python-opengl命令来安装。所以，操作如下：
apt-get install python-opengl
但使用上述命令时又遇到了一个其他问题：
Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package python-opengl
解决方案：使用sudo权限，更新apt-get。
sudo apt-get update
重新安装python-opengl即可
apt-get install python-opengl
