Tkinter:更新位于不同类中的字段

import tkinter as tk

class MainWindow(tk.Tk):
    def __init__(self):
        super().__init__()
        
        self.label = tk.Label(self, text="字段值：")
        self.label.pack()
        
        self.other_class = OtherClass(self)
        
    def update_field(self, value):
        self.label.config(text="字段值：" + value)

class OtherClass:
    def __init__(self, main_window):
        self.main_window = main_window
        
        self.field_value = "初始值"
        
        self.update_field_value()
        
    def update_field_value(self):
        self.field_value = "更新后的值"
        self.main_window.update_field(self.field_value)

if __name__ == "__main__":
    window = MainWindow()
    window.mainloop()