PyOpenGL TypeError: 'NoneType' object is not callable

Question

I am trying to learn the basics of game programming and I have installed pygame and pyopengl for that.

MyCode:

import sys
import OpenGL

from OpenGL.GL import *     
from OpenGL.GLU import *    
from OpenGL.GLUT import *

def draw():
      glClear(GL_COLOR_BUFFER_BIT)
      glutWireTeapot(0.5)
      glFlush()

glutInit(sys.argv)
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB)
glutInitWindowSize(250, 250)
glutInitWindowPosition(100, 100)
glutCreateWindow("Python OGL Program")
glutDisplayFunc(draw)
glutMainLoop()

draw()

When I run the above code in my command prompt using

python test.py

I get the following error.

Traceback (most recent call last):
  File "test.py", line 13, in <module>
    glutInit(sys.argv)
  File "C:\Python27\lib\site-packages\pyopengl-3.0.2a5-py2.7.egg\OpenGL\GLUT\special.py", line 324, in glutInit
    _base_glutInit( ctypes.byref(count), holder )
TypeError: 'NoneType' object is not callable

I don't understand why I am getting this error. Am I calling glutinit in a wrong way?

I am using Python 2.7.2.

Answer 1

I was using Python 2.7.3 on Windows 7 64-bit and had a problem causing the same symptoms as Noob.

But the above PyOpenGL reinstallation solution did not help me.

I try a longshot - installation of freeglut - and it helped!

I used Windows MSVC 2.8.0 binary package from here and dropped both 32-bit and 64-bit DLLs to my 32-bit (c:\Windows\SysWOW64) and 64-bit (C:\Windows\System32) dirs accordingly.