_opengl mystery

[aya]

Hi Pythonamians,
About 1 hour ago I took a look at Python for the first time.  I installed
all the binaries and modules, and, as expected, none of the demos ran.  But
at least they all barf on the same error:

<<<<<
Traceback (innermost last):
  File "./jw.py", line 7, in ?
    from OpenGL.Tk import *
  File "/usr/lib/python1.5/site-packages/OpenGL/Tk/__init__.py", line 9, in
?
    from OpenGL.GL import *
  File "/usr/lib/python1.5/site-packages/OpenGL/GL/__init__.py", line 7, in
?
    from _opengl import *
ImportError: No module named _opengl
>>>>>

and in the file /usr/lib/python1.5/site-packages/OpenGL/GL/__init__.py.....

<<<<<
import OpenGL.shared
import OpenGL
if OpenGL._numeric:
    from _opengl_num import *
    from openglutil_num import *
else:
    from _opengl import *
    from openglutil import *
>>>>>

So. my question is:

1) Why would this module import another module that doesn't exist?

2) Where can I get these modules (either the numeric or the _opengl).  I
have installed
        python-doc-html-1.5.2-1.noarch.rpm
        python-opengl-1.5.5-2.i386.rpm
        python-imaging-1.0b1-3.i386.rpm
        python-tkinter-1.5.2-2.i386.rpm
        python-imaging-_tkinter-1.0b1-3.i386.rpm
and all the supporting libs, but none of these have _opengl in them

3)  Am I correct in assuming that the file in question is called
"_opengl.py"?

When I do a 'locate _opengl' all I get is

/usr/lib/python1.5/site-packages/OpenGL/shared/linux2/_opengl_nummodule.so
/usr/lib/python1.5/site-packages/OpenGL/shared/linux2/_openglmodule.so

4) is that _opengl_nummodule.so the numeric module for python?  If so, why
does "if OpenGL._numeric:" fail in the file
"/usr/lib/python1.5/site-packages/OpenGL/GL/__init__.py"?

Thank in advance for putting up these newbie questions

-aya