kivy with error 'unable to get a window'

问题

Anyone know how to use kivy? I installed it on my window7, python2.7. When I run following code:

import kivy

from kivy.app import App
from kivy.uix.label import Label


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

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

it gives following error:

Unable to get a Window, abort.

I tried on python3.4, same error. Anyone know how to solve this problem? Please.

回答1:

There is an option that sdl2 can't find dlls needed to load *.png

• Try to find libpng16-16.dll

on my PC is here: C:\Python27\share\gstreamer\bin

• Add it to PATH

  set PATH=C:\Python27\share\gstreamer\bin;%PATH%

This is temporary solution but it works for me

来源：https://stackoverflow.com/questions/34640466/kivy-with-error-unable-to-get-a-window