OpenGL.error.NullFunctionError: Attempt to call an undefined function （ubuntu14(32位) python opengl ）

安装opengl 

使用命令 sudo pip install pyopengl

然后执行实例代码

import sysimport mathimport numpyimport OpenGLfrom OpenGL.GL import *from OpenGL.GLUT import *import Imageimport linkage# ... a whole load of definitions etc ...glutInit(sys.argv)glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB)glutInitWindowSize(600, 600)glutCreateWindow('linkage')init()initWindow()glutIdleFunc(idle)glutMainLoop(

报错：OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

解决： 执行sudo apt-get install python-opengl