Question

我安装了kivy：

sudo apt-get install python3-kivy

当我从终端运行一个简单的hello world button程序时，它不显示窗口，但也不显示错误消息。我该怎么办？我的代码：

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

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


Sample().run()

P.S。 Python 3.6.5，kivy 1.9.1

编辑：按照@khaled khalil的建议，我尝试了解决方法。终端输出：

[INFO   ] [Logger      ] Record log in /home/shamildacoder/.kivy/logs/kivy_18-07-18_1.txt
[INFO   ] [Kivy        ] v1.9.1
[INFO   ] [Python      ] v3.6.5 (default, Apr  1 2018, 05:46:30) 
[GCC 7.3.0]
[INFO   ] [Factory     ] 179 symbols loaded
[DEBUG  ] [Cache       ] register <kv.lang> with limit=None, timeout=None
[DEBUG  ] [Cache       ] register <kv.image> with limit=None, timeout=60
[DEBUG  ] [Cache       ] register <kv.atlas> with limit=None, timeout=None
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_gif, img_sdl2, img_pil (img_ffpyplayer ignored)
[DEBUG  ] [Cache       ] register <kv.texture> with limit=1000, timeout=60
[DEBUG  ] [Cache       ] register <kv.shader> with limit=1000, timeout=3600
[INFO   ] [Text        ] Provider: sdl2
[DEBUG  ] [App         ] Loading kv <./hi.kv>
[DEBUG  ] [App         ] kv <./hi.kv> not found
[DEBUG  ] [Window      ] Ignored <egl_rpi> (import error)
[INFO   ] [OSC         ] using <multiprocessing> for socket
[INFO   ] [Window      ] Provider: sdl2(['window_egl_rpi'] ignored)
[DEBUG  ] [Window      ] Ignored <x11> (import error)
[CRITICAL] [Window      ] Unable to find any valuable Window provider at all!
egl_rpi - ImportError: cannot import name 'bcm'
  File "/usr/lib/python3/dist-packages/kivy/core/__init__.py", line 59, in core_select_lib
    fromlist=[modulename], level=0)
  File "/usr/lib/python3/dist-packages/kivy/core/window/window_egl_rpi.py", line 12, in <module>
    from kivy.lib.vidcore_lite import bcm, egl

sdl2 - TypeError: expected bytes, str found
  File "/usr/lib/python3/dist-packages/kivy/core/__init__.py", line 67, in core_select_lib
    cls = cls()
  File "/usr/lib/python3/dist-packages/kivy/core/window/window_sdl2.py", line 138, in __init__
    super(WindowSDL, self).__init__()
  File "/usr/lib/python3/dist-packages/kivy/core/window/__init__.py", line 722, in __init__
    self.create_window()
  File "/usr/lib/python3/dist-packages/kivy/core/window/window_sdl2.py", line 237, in create_window
    self.fullscreen, resizable, state)
  File "kivy/core/window/_window_sdl2.pyx", line 94, in kivy.core.window._window_sdl2._WindowSDL2Storage.setup_window (kivy/core/window/_window_sdl2.c:2204)

x11 - ModuleNotFoundError: No module named 'kivy.core.window.window_x11'
  File "/usr/lib/python3/dist-packages/kivy/core/__init__.py", line 59, in core_select_lib
    fromlist=[modulename], level=0)

[CRITICAL] [App         ] Unable to get a Window, abort.
 Exception ignored in: 'kivy.properties.dpi2px'
 Traceback (most recent call last):
   File "/usr/lib/python3/dist-packages/kivy/utils.py", line 513, in __get__
     retval = self.func(inst)
   File "/usr/lib/python3/dist-packages/kivy/metrics.py", line 175, in dpi
     EventLoop.ensure_window()
   File "/usr/lib/python3/dist-packages/kivy/base.py", line 126, in ensure_window
     sys.exit(1)
 SystemExit: 1
[CRITICAL] [App         ] Unable to get a Window, abort.

kivy在linux ubuntu上不显示窗口

0 个答案: