AttributeError: 'NoneType' object has no attribute 'decode'

[hetianlong88]

After starting up a Python interpreter.
(animated_drawings) root@container:~/AnimatedDrawings# python
Python 3.8.13 (default, Oct 21 2022, 23:50:54)
[GCC 11.2.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.

from animated_drawings import render
render.start('./examples/config/mvc/export_mp4_example.yaml')
/root/miniconda3/envs/animated_drawings/lib/python3.8/site-packages/glfw/init.py:912: GLFWError: (65544) b'X11: The DISPLAY environment variable is missing'
warnings.warn(message, GLFWError)
/root/miniconda3/envs/animated_drawings/lib/python3.8/site-packages/glfw/init.py:912: GLFWError: (65537) b'The GLFW library is not initialized'
warnings.warn(message, GLFWError)
Traceback (most recent call last):
File "", line 1, in
File "/root/AnimatedDrawings/animated_drawings/render.py", line 17, in start
view = View.create_view(cfg.view)
File "/root/AnimatedDrawings/animated_drawings/view/view.py", line 47, in create_view
return WindowView(view_cfg)
File "/root/AnimatedDrawings/animated_drawings/view/window_view.py", line 34, in init
self._create_window(*cfg.window_dimensions) # pyright: ignore[reportGeneralTypeIssues]
File "/root/AnimatedDrawings/animated_drawings/view/window_view.py", line 126, in _create_window
logging.info(f'OpenGL Version: {GL.glGetString(GL.GL_VERSION).decode()}') # pyright: ignore[reportGeneralTypeIssues]
AttributeError: 'NoneType' object has no attribute 'decode'

What's going to happen to this problem?
Installing Ubuntu 18.04 operating system,GPU TITAN Xp(12GB).

[lbj96347]

If echo $DISPLAY returns nothing, then try export DISPLAY=:0.0 before running all sample.

[hetianlong88]

thanks，It's been resolved.

[tianruci]

export DISPLAY=:0.0

hey but how ..