Kivy-根本无法找到任何有价值的窗户提供商

Question

我从kivy开始。这是我正在运行的示例代码。

import kivy
from kivy.app import App
from kivy.uix.button import Label
kivy.require('1.9.0')

class HelloApp(App):
    def build(self):
        return Label(text='Hello World!')
if __name__ == "__main__":
    HelloApp().run()

这是我得到的追溯：

[INFO              ] [Logger      ] Record log in C:Usersmonac.kivylogskivy_16-11-23_9.txt
[INFO              ] [Kivy        ] v1.9.1
[INFO              ] [Python      ] v3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 20:20:57) [MSC v.1600 64 bit (AMD64)]
[INFO              ] [Factory     ] 179 symbols loaded
[INFO              ] [Image       ] Providers: img_tex, img_dds, img_gif, img_sdl2 (img_pil, img_ffpyplayer ignored)
[INFO              ] [Text        ] Provider: sdl2
[INFO              ] [OSC         ] using <thread> for socket
[INFO              ] [Window      ] Provider: sdl2
[INFO              ] [GL          ] GLEW initialization succeeded
[INFO              ] [GL          ] OpenGL version <b'4.5.0 NVIDIA 373.06'>
[INFO              ] [GL          ] OpenGL vendor <b'NVIDIA Corporation'>
[INFO              ] [GL          ] OpenGL renderer <b'GeForce GTX 960M/PCIe/SSE2'>
[INFO              ] [GL          ] OpenGL parsed version: 4, 5
[INFO              ] [GL          ] Shading version <b'4.50 NVIDIA'>
[INFO              ] [GL          ] Texture max size <16384>
[INFO              ] [GL          ] Texture max units <32>
[WARNING           ] [Image       ] Unable to load image <C:Python34libsite-packageskivydataglsldefault.png>
[CRITICAL          ] [Window      ] Unable to find any valuable Window provider at all!
sdl2 - Exception: SDL2: Unable to load image
  File "C:Python34libsite-packageskivycore__init__.py", line 67, in core_select_lib
    cls = cls()
  File "C:Python34libsite-packageskivycorewindowwindow_sdl2.py", line 138, in __init__
    super(WindowSDL, self).__init__()
  File "C:Python34libsite-packageskivycorewindow__init__.py", line 722, in __init__
    self.create_window()
  File "C:Python34libsite-packageskivycorewindowwindow_sdl2.py", line 255, in create_window
    super(WindowSDL, self).create_window()
  File "C:Python34libsite-packageskivycorewindow__init__.py", line 897, in create_window
    self.render_context = RenderContext()
  File "kivygraphicsinstructions.pyx", line 756, in kivy.graphics.instructions.RenderContext.__init__ (kivygraphicsinstructions.c:10729)
  File "C:Python34libsite-packageskivycoreimage__init__.py", line 512, in __init__
    self.filename = arg
  File "C:Python34libsite-packageskivycoreimage__init__.py", line 700, in _set_filename
    mipmap=self._mipmap, nocache=self._nocache)
  File "C:Python34libsite-packageskivycoreimage__init__.py", line 430, in load
    im = loader(filename, **kwargs)
  File "C:Python34libsite-packageskivycoreimage__init__.py", line 198, in __init__
    self._data = self.load(filename)
  File "C:Python34libsite-packageskivycoreimageimg_sdl2.py", line 42, in load
    raise Exception('SDL2: Unable to load image')
[CRITICAL          ] [App         ] Unable to get a Window, abort.
 Exception ignored in: 'kivy.properties.dpi2px'
 Traceback (most recent call last):
   File "C:Python34libsite-packageskivyutils.py", line 513, in __get__
     retval = self.func(inst)
   File "C:Python34libsite-packageskivymetrics.py", line 175, in dpi
     EventLoop.ensure_window()
   File "C:Python34libsite-packageskivybase.py", line 126, in ensure_window
     sys.exit(1)
 SystemExit: 1
[CRITICAL          ] [App         ] Unable to get a Window, abort.

我在Windows 10 64bits上运行。我已经安装了除gstreamer以外的所有依赖项，目前我不需要。

我也不确定为什么会遇到此错误：

[WARNING           ] [Image       ] Unable to load image <C:Python34libsite-packageskivydataglsldefault.png>

文件存在，我正在运行代码作为管理员，以避免访问权限问题。

谢谢。

Answer 1

您必须安装Kivy的依赖项。

按照此处的说明

python -m pip install docutils pygments pypiwin32 kivy.deps.sdl2 kivy.deps.glew

将做您需要的事情。

Answer 2

我在使用--system-site-packages创建我的VirtualEnv之前，安装Kivy及其依赖项后，遇到了相同的错误。为了解决它，我必须离开我的虚拟，卸载所有包装kivy，输入我的Virtualenv，然后重新安装。

Answer 3

您必须安装所有依赖项详细检查此URLhttps://kivy.org/docs/installation/installation-windows.html#kivy-dependencies我逐步遵循不要忘记安装kivy.deps.angle，kivy.deps.glew，kivy.deps.gstreamer，kivy.deps.sdl2

Answer 4

在虚拟软件的显示设置（aka vmbox，vmware）中禁用3D加速度和2D视频加速度。我认为这对您有用，经过很多尝试，它对我有用。

Answer 5

使用pyinstaller生成的区域时，有些人可能遇到相同的问题。

Kivy Doc提醒开发人员添加这些依赖项。https://kivy.org/doc/stable/guide/packaging-windows.html#pyinstaller-default-hook

但是我不得不添加 Angle 使其在我的上下文中起作用。

from kivy_deps import sdl2, glew, angle
coll = COLLECT(exe, Tree('examples-path\demo\touchtracer\'),
               a.binaries,
               a.zipfiles,
               a.datas,
               *[Tree(p) for p in (sdl2.dep_bins + glew.dep_bins+ angle.dep_bins)],
               strip=False,
               upx=True,
               name='touchtracer')