Kivy: How to change window size?

There’re currently two ways:

• Before the window is created:

  import kivy
  kivy.require('1.9.0')
  
  from kivy.config import Config
  Config.set('graphics', 'width', '200')
  Config.set('graphics', 'height', '200')
  

• Dynamically after the Window was created:

  from kivy.core.window import Window
  Window.size = (300, 100)