如何访问另一个tkinter frame子类中的属性？

import tkinter as tk

class Frame1(tk.Frame):
    def __init__(self, parent):
        tk.Frame.__init__(self, parent)
        
        self.parent = parent
        self.frame2_instance = Frame2(self.parent)
        
        button = tk.Button(self, text="获取frame2属性", command=self.get_frame2_property)
        button.pack()
        
    def get_frame2_property(self):
        property_value = self.frame2_instance.property_name
        print(property_value)

class Frame2(tk.Frame):
    def __init__(self, parent):
        tk.Frame.__init__(self, parent)
        
        self.property_name = "这是frame2的属性值"

root = tk.Tk()
frame1 = Frame1(root)
frame1.pack()

root.mainloop()