pyglet.canvas.xlib.NoSuchDisplayException：无法连接到“None”仅发生在 VSCode 终端中

Question

如果我在 VSCode 终端中运行此代码

import pyglet
window = pyglet.window.Window(500, 500)

我明白了

Traceback (most recent call last):
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/__init__.py", line 334, in __getattr__
    return getattr(self._module, name)
AttributeError: 'NoneType' object has no attribute 'Window'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/justin/Dropbox/jr/py/pyglet_games/pyglet_demo/displaytest.py", line 5, in <module>
    window = pyglet.window.Window(500, 500)
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/__init__.py", line 340, in __getattr__
    __import__(import_name)
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/window/__init__.py", line 1891, in <module>
    gl._create_shadow_window()
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/gl/__init__.py", line 220, in _create_shadow_window
    _shadow_window = Window(width=1, height=1, visible=False)
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/window/xlib/__init__.py", line 171, in __init__
    super(XlibWindow, self).__init__(*args, **kwargs)
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/window/__init__.py", line 573, in __init__
    display = pyglet.canvas.get_display()
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/canvas/__init__.py", line 94, in get_display
    return Display()
  File "/home/justin/.local/lib/python3.8/site-packages/pyglet/canvas/xlib.py", line 123, in __init__
    raise NoSuchDisplayException('Cannot connect to "%s"' % name)
pyglet.canvas.xlib.NoSuchDisplayException: Cannot connect to "None"

但是，如果我在命令行中运行它，则会按预期出现一个窗口。如果我在我用来教学的 Thonny 中运行它，它也会按预期工作。我已经验证在终端或 VSCode 中运行时 sys.version 和 sys.path 是相同的。

我已经寻找了这个问题的解决方案，但在存在的少数其他情况下，它在以一种方式运行而不是以另一种方式运行时不起作用。大多数解决方案涉及更改显卡设置或运行 X11 服务器。这似乎与这里无关，因为它似乎只与 VSCode 相关。

谢谢。

Answer 1

我也遇到了同样的问题，不仅是pyglet与任何试图打开窗户的东西有关。

看起来是 VS Code 内部终端的问题。设置console为替代方案launch.json为我解决了这个问题。

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Current File",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "externalTerminal"
        }
    ]
}

事实上，将以下内容添加到我的 python 脚本中可以解决问题（至少与切换到 Wayland 结合使用）：

import os
os.environ['DISPLAY'] = ':1'

有谁知道如何将其设为永久设置，以便我编写的每个需要输出到显示器的模块中不需要它？