Kivy如果按钮被按下了特定的时间，请执行此操作

from kivy.app import App
from kivy.uix.button import Button
from kivy.clock import Clock

class MyApp(App):
    def build(self):
        button = Button(text='Press and hold for 1 second')
        button.bind(on_press=self.on_button_press, on_release=self.on_button_release)
        return button

    def on_button_press(self, instance):
        Clock.schedule_once(self.execute_operation, 1)  # 延迟1秒后执行操作

    def on_button_release(self, instance):
        Clock.unschedule(self.execute_operation)  # 取消延迟执行操作

    def execute_operation(self, dt):
        print("Button was pressed for 1 second. Performing operation...")

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