如何让程序在kivy中重新启动？

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.popup import Popup
from kivy.uix.screenmanager import ScreenManager, Screen

class RestartScreen(Screen):
    pass

sm = ScreenManager()
sm.add_widget(RestartScreen(name='restart'))

class MyApp(App):
    def build(self):
        return sm

    def restart_app(self):
        # 重新启动应用的逻辑
        App.get_running_app().stop()
        MyApp().run()

<RestartScreen>:
    BoxLayout:
        orientation: 'vertical'
        Button:
            text: 'Restart'
            on_release: app.restart_app()