如何在python中轻松干净地更新Kivy小部件中的图像？

from kivy.app import App
from kivy.uix.image import Image
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from kivy.core.image import Image as CoreImage

class MyWidget(BoxLayout):
    def __init__(self, **kwargs):
        super(MyWidget, self).__init__(**kwargs)
        
        # 创建一个Image对象，并将其添加到小部件中
        self.image = Image()
        self.add_widget(self.image)
        
        # 更新图像的回调函数
        Clock.schedule_once(self.update_image, 1)
    
    def update_image(self, dt):
        # 加载新图像
        new_image = CoreImage('new_image.png')
        
        # 更新小部件中的图像
        self.image.texture = new_image.texture

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

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