Kivy: pause after on_press

pausetest.py

import kivy
kivy.require('1.9.0')

from kivy.app import App
from kivy.lang import Builder
import webbrowser

root = Builder.load_string('''
Button:
    text: 'Press Me!'
    on_press: app.doit()
    on_release: print 'BUTTON RELEASED'
''')


class TestApp(App):
    def build(self):
        return root

    def on_pause(self):
        print 'PAUSING APP NOW!!!!'
        return True

    def on_resume(self):
        print 'RESUMING APP NOW!!!!'

    def doit(self, *args):
        webbrowser.open('http://kivy.org')


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