Python2.7+PyOpenGL运行报错：NameError: global name 'BaseFunction' is not defined

Hey there! Let's break down this frustrating error you're hitting while following thenewboston's Pygame tutorial. That NameError referencing BaseFunction is nearly always a sign of a broken or incompatible PyOpenGL installation in your Anaconda-Spyder 3.3.4 (Python 2.7) environment.

First, let's recap the error trace you shared to align on the issue:

Traceback (most recent call last):
File "<ipython-input-8-72d57f8b0dbe>", line 1, in <module>
glEnd()
File "/home/cadu/anaconda2/lib/python2.7/site-packages/OpenGL /latebind.py", line 61, in __call__
return self.wrapperFunction( self.baseFunction, *args, **named )
File "/home/cadu/anaconda2/lib/python2.7/site-packages/OpenGL/GL/exceptional.py", line 45, in glEnd
return BaseFunction( )
NameError: global name 'BaseFunction' is not defined

What's causing this? #

The exceptional.py module in PyOpenGL tries to use BaseFunction but hasn't imported it properly. This usually happens for one of these reasons:

• The PyOpenGL package was corrupted during installation
• You installed a PyOpenGL version that drops support for Python 2.7 (since Python 2.7 is end-of-life, newer versions don't support it)
• There's a dependency conflict in your Anaconda environment

Step-by-step fix: #

1. Uninstall the broken PyOpenGL installation
   Open your Anaconda prompt and run:

   conda uninstall -y pyopengl pyopengl-accelerate
   # If conda doesn't locate the packages, use pip instead:
   pip uninstall -y pyopengl pyopengl-accelerate
   

2. Reinstall a Python 2.7-compatible version
   The last PyOpenGL versions that support Python 2.7 are 3.1.5. Install them with:

   pip install pyopengl==3.1.5 pyopengl-accelerate==3.1.5
   

   We use pip here because conda's repository might not have these older, Python 2.7-friendly versions readily available.

3. Verify the fix
   In Spyder, run this minimal test code to confirm glEnd() works without errors:

   from OpenGL.GL import glBegin, glEnd, GL_LINES
   glBegin(GL_LINES)
   glEnd()
   

Quick tweak for your cube code: #

I noticed your glRotatef(20, 0, 0, 0) line—setting all axis parameters to 0 means the cube won't rotate at all. Try changing it to glRotatef(20, 1, 1, 0) to get a smooth spinning effect once the error is fixed!

内容的提问来源于stack exchange，提问作者Carlos_kuro