Python中PyOpenGL导入报错：'NoneType'无eglGetCurrentContext属性

已通过pip正确安装OpenGL相关组件，但仅执行模块导入就触发报错，代码及错误信息如下：

代码片段 #

# ulWindow
import ulMath as ulm
import OpenGL.GL as gl
import OpenGL.GlE as gle
import glfw

def init() -> int|str:
     if (not glfw.init()):
          return "GLFW Failed to initialize"
     return 0

错误信息 #

Traceback (most recent call last):
  File "src/ulWindow.py", line 3, in <module>
    import OpenGL.GL as gl
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/GL/__init__.py", line 4, in <module>
    from OpenGL.GL.VERSION.GL_1_1 import *
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/GL/VERSION/GL_1_1.py", line 14, in <module>
    from OpenGL.raw.GL.VERSION.GL_1_1 import *
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/raw/GL/VERSION/GL_1_1.py", line 7, in <module>
    from OpenGL.raw.GL import _errors
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/raw/GL/_errors.py", line 4, in <module>
    _error_checker = _ErrorChecker( _p, _p.GL.glGetError )
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/error.py", line 183, in __init__
    self._isValid = platform.CurrentContextIsValid
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/platform/baseplatform.py", line 15, in __get__
    value = self.fget( obj )
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/platform/baseplatform.py", line 356, in CurrentContextIsValid
    return self.GetCurrentContext
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/platform/baseplatform.py", line 15, in __get__
    value = self.fget( obj )
  File "/home/jack3/.local/lib/python3.8/site-packages/OpenGL/platform/egl.py", line 106, in GetCurrentContext
    return self.EGL.eglGetCurrentContext
AttributeError: 'NoneType' object has no attribute 'eglGetCurrentContext'

解决方法 #

• 调整导入顺序：PyOpenGL在导入时会尝试检测当前OpenGL上下文，此时GLFW尚未初始化会导致EGL上下文获取失败。先初始化GLFW再导入PyOpenGL模块：

# ulWindow
import ulMath as ulm
import glfw

# 先初始化GLFW
if not glfw.init():
    raise RuntimeError("GLFW Failed to initialize")

# 再导入PyOpenGL组件
import OpenGL.GL as gl
import OpenGL.GlE as gle

def init() -> int|str:
    return 0

• 强制指定OpenGL平台：如果调整顺序无效，在导入PyOpenGL前设置环境变量指定使用GLFW平台：

import os
os.environ['PYOPENGL_PLATFORM'] = 'glfw'

import ulMath as ulm
import OpenGL.GL as gl
import OpenGL.GlE as gle
import glfw

def init() -> int|str:
     if (not glfw.init()):
          return "GLFW Failed to initialize"
     return 0

• 检查系统依赖库：确保系统已安装OpenGL相关系统库，比如在Debian/Ubuntu系统执行：

sudo apt-get install libgl1-mesa-glx libegl1-mesa

内容的提问来源于stack exchange，提问作者Jack4j2