如何使用kivy从动态添加的小部件中传递信息？

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

class CustomWidget(Button):
    def __init__(self, text, **kwargs):
        super(CustomWidget, self).__init__(**kwargs)
        self.text = text
        self.bind(on_press=self.on_button_press)

    def on_button_press(self, instance):
        print("Button pressed:", self.text)

class MyApp(App):
    def build(self):
        layout = BoxLayout(orientation='vertical')
        
        # 动态添加两个自定义小部件
        widget1 = CustomWidget(text="Widget 1")
        widget2 = CustomWidget(text="Widget 2")
        layout.add_widget(widget1)
        layout.add_widget(widget2)
        
        return layout

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