Python pigment and opengl

I am trying to get 3D capabilities through python and download pyglet. After going through the first example in this tutorial , I got a bunch of strange errors that I cannot distinguish between. The following is the script I am trying to run:

import pyglet

win = pyglet.window.Window()

@win.event
def on_draw():
    win.clear()

pyglet.app.run()

      

        
        
        
      

    

2 Below is the output I got from the python interpreter after I imported my script:

>>> import test as t
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "test.py", line 13, in <module>
    pyglet.app.run()
  File "/usr/lib/pymodules/python2.7/pyglet/app/__init__.py", line 264, in run
    EventLoop().run()
  File "/usr/lib/pymodules/python2.7/pyglet/app/xlib.py", line 93, in run
    sleep_time = self.idle()
  Fihttp://greendalecs.wordpress.com/2012/04/21/3d-programming-in-python-part-1/#commentsle "/usr/lib/pymodules/python2.7/pyglet/app/__init__.py", line 193, in idle        
    window.dispatch_event('on_draw')
  File "/usr/lib/pymodules/python2.7/pyglet/window/__init__.py", line 1219, in dispatch_event
    EventDispatcher.dispatch_event(self, *args)
  File "/usr/lib/pymodules/python2.7/pyglet/event.py", line 340, in dispatch_event
    if handler(*args):
  File "test.py", line 13, in on_draw
    pyglet.app.run()
NameError: global name 'GL_COlOR_BUFFER_BIT' is not defined

      

        
        
        
      

    

• How can I fix these errors? I am using Ubuntu 12.04 LTS and Emacs 24.3.
• I downloaded pyglet via apt-get install
  
  , but is there anything else I needed to do? Maybe I don't have any configured drivers or I need other software.

If you need more information, let me know!