如何从持续运行的函数中动态更新Kivy标签？

from kivy.app import App
from kivy.uix.label import Label

class MyApp(App):
    def build(self):
        self.label = Label(text="初始文本")
        return self.label

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

from kivy.app import App
from kivy.uix.label import Label
from kivy.clock import Clock

class MyApp(App):
    def build(self):
        self.label = Label(text="初始文本")
        Clock.schedule_interval(self.update_label, 1)  # 每秒钟调用一次update_label函数
        return self.label

    def update_label(self, dt):
        # 在这里编写更新标签文本的逻辑
        self.label.text = "动态更新的文本"

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