Kivy-屏幕上出现Python3黑色闪烁，然后没有任何错误，没有错误发生

Question

[我使用以下python代码尝试了使用kivy（1.11.1版）的基本的hello world示例，但是我无法使其工作。

import kivy
from kivy.app import App
from kivy.uix.button import Button

class MyApp(App):
    def build(self):
        return Button(text='Hello World')

if __name__ == '__main__':
    MyApp().run()

[当我从终端运行它（在Linux，lubuntu 19.04上）时，它在屏幕上出现快速的黑色闪烁（仅几分之一秒），然后一切恢复到以前的状态而没有任何异常的窗口，终端显示以下日志但没有错误。即使使用sudo运行它，也可以避免权限错误（显然）没有任何区别。之后，我必须通过KeyboardInterrupt停止程序。

[INFO   ] [Logger      ] Record log in /home/test/.kivy/logs/kivy_20-03-10_48.txt
[INFO   ] [Kivy        ] v1.11.1
[INFO   ] [Kivy        ] Installed at "/home/test/.local/lib/python3.7/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.7.3 (default, Oct  7 2019, 12:56:13) 
[GCC 8.3.0]
[INFO   ] [Python      ] Interpreter at "/usr/bin/python3"
[INFO   ] [Factory     ] 184 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Window      ] Provider: sdl2(['window_egl_rpi'] ignored)
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] Backend used <sdl2>
[INFO   ] [GL          ] OpenGL version <b'3.0 Mesa 19.0.8'>
[INFO   ] [GL          ] OpenGL vendor <b'Intel Open Source Technology Center'>
[INFO   ] [GL          ] OpenGL renderer <b'Mesa DRI Intel(R) Sandybridge Mobile '>
[INFO   ] [GL          ] OpenGL parsed version: 3, 0
[INFO   ] [GL          ] Shading version <b'1.30'>
[INFO   ] [GL          ] Texture max size <8192>
[INFO   ] [GL          ] Texture max units <16>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event8
[INFO   ] [MTD         ] Read event from </dev/input/event8>
[INFO   ] [Base        ] Start application main loop
[WARNING] [MTD         ] Unable to open device "/dev/input/event8". Please ensure you have the appropriate permissions.
[INFO   ] [GL          ] NPOT texture support is available
^C[INFO   ] [Base        ] Leaving application in progress...

我试图重新安装kivy和其他依赖项，但没有结果，我该怎么办？

Answer 1

使用python 2.7暂时解决了这个问题，实际上文档没有使用python 3，但是可以使用实际的python版本吗？