Kivy，有没有办法只改变布局中的所有按钮属性？

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

class MyApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical')
        
        # 添加按钮到布局中
        for i in range(5):
            button = Button(text='Button {}'.format(i))
            layout.add_widget(button)
        
        # 修改按钮属性
        for button in layout.children:
            button.background_color = (1, 0, 0, 1)  # 修改按钮背景颜色为红色
        
        return layout

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