Kivy -按id删除小部件

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button

class MyBoxLayout(BoxLayout):
    def remove_widget_by_id(self, widget_id):
        if widget_id in self.ids:
            widget = self.ids[widget_id]
            self.remove_widget(widget)

class MyApp(App):
    def build(self):
        layout = MyBoxLayout()
        button1 = Button(text='Button 1', id='button1')
        button2 = Button(text='Button 2', id='button2')
        layout.add_widget(button1)
        layout.add_widget(button2)
        return layout

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