错误
ImportError: DLL load failed: 找不到指定的模块
from kivy.core.window._window_sdl2 import _WindowSDL2Storage
解决
pip install --upgrade docutils pygments pypiwin32 kivy.deps.sdl2 kivy.deps.glew kivy.deps.gstreamer --extra-index-url https://kivy.org/downloads/packages/simple/