如何在kivy中引用另一个类方法

from kivy.app import App

class MainApp(App):
    def __init__(self, **kwargs):
        super(MainApp, self).__init__(**kwargs)
        
    def some_method(self):
        # 在这里引用另一个类的方法
        another_class = AnotherClass()
        another_class.another_method()

class AnotherClass:
    def __init__(self):
        pass
    
    def another_method(self):
        # 这里是你想要引用的方法的实现
        print("Hello from another method!")

from kivy.uix.label import Label

class MainApp(App):
    def __init__(self, **kwargs):
        super(MainApp, self).__init__(**kwargs)
        
    def some_method(self):
        another_class = AnotherClass()
        another_class.another_method()
        
    def build(self):
        self.some_method()
        return Label(text='Hello Kivy!')