PyOpenGL: Fix Attempt to call an undefined function glutInit .

This tutorial is about how to fix this error using Python version 3.6.4 :

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

First I start with a common pip3.6 install.

Scripts>pip3.6.exe install PyOpenGL
Collecting PyOpenGL
  Downloading https://files.pythonhosted.org/packages/9c/1d/4544708aaa89f26c97cc
09450bb333a23724a320923e74d73e028b3560f9/PyOpenGL-3.1.0.tar.gz (1.2MB)
    100% |████████████████████████████████| 1.2MB 1.2MB/s
Building wheels for collected packages: PyOpenGL
  Running setup.py bdist_wheel for PyOpenGL ... done
  Stored in directory: C:\Users\catafest\AppData\Local\pip\Cache\wheels\6c\00\7f
\1dd736f380848720ad79a1a1de5272e0d3f79c15a42968fb58
Successfully built PyOpenGL
Installing collected packages: PyOpenGL
Successfully installed PyOpenGL-3.1.0

When I run my python script code I got this error:

c:\Python364\Scripts>cd ..
c:\Python364>python.exe opengl_001.py
Traceback (most recent call last):
  File "opengl_001.py", line 182, in 
    StereoDepth().main()
  File "opengl_001.py", line 173, in main
    glutInit()
  File "c:\Python364\lib\site-packages\OpenGL\GLUT\special.py", line 333, in glu
tInit
    _base_glutInit( ctypes.byref(count), holder )
  File "c:\Python364\lib\site-packages\OpenGL\platform\baseplatform.py", line 40
7, in __call__
    self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit,
check for bool(glutInit) before calling

I use the whl files from here.

c:\Python364>cd Scripts

c:\Python364\Scripts>pip3.6.exe install PyOpenGL-3.1.2-cp36-cp36m-win_amd64.whl
Processing c:\python364\scripts\pyopengl-3.1.2-cp36-cp36m-win_amd64.whl
Installing collected packages: PyOpenGL
  Found existing installation: PyOpenGL 3.1.0
    Uninstalling PyOpenGL-3.1.0:
      Successfully uninstalled PyOpenGL-3.1.0
Successfully installed PyOpenGL-3.1.2

c:\Python364\Scripts>pip3.6.exe install PyOpenGL_accelerate-3.1.2-cp36-cp36m-win
_amd64.whl
Processing c:\python364\scripts\pyopengl_accelerate-3.1.2-cp36-cp36m-win_amd64.w
hl
Installing collected packages: PyOpenGL-accelerate
Successfully installed PyOpenGL-accelerate-3.1.2

This allow me to run well the python script with PyOpenGL python module.
This is result of shader stereo depth image: