Kivy两个按钮..。如何让其中一个按钮在按下时移除另一个按钮？

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

class MyLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MyLayout, self).__init__(**kwargs)
        self.orientation = 'vertical'
        
        # 创建第一个按钮
        self.button1 = Button(text='Button 1')
        self.add_widget(self.button1)
        
        # 创建第二个按钮
        self.button2 = Button(text='Button 2')
        self.button2.bind(on_press=self.remove_button1)
        self.add_widget(self.button2)
    
    def remove_button1(self, instance):
        # 移除第一个按钮
        self.remove_widget(self.button1)

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

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