从父类下定义的函数更新多页GUI中的tkinter进度条

import tkinter as tk

root = tk.Tk()

class PageManager:
    def __init__(self, root):
        self.root = root
        self.pages = []
        
        # 创建进度条和变量
        self.progress_var = tk.DoubleVar()
        self.progress_bar = tk.Progressbar(root, variable=self.progress_var)
        self.progress_bar.pack()
        
    def update_progress(self, value):
        self.progress_var.set(value)

class Page(tk.Frame):
    def __init__(self, parent, page_manager):
        tk.Frame.__init__(self, parent)
        self.page_manager = page_manager
        
        # 创建按钮
        self.button = tk.Button(self, text="更新进度条", command=self.update_progress)
        self.button.pack()
        
    def update_progress(self):
        # 调用父类的函数更新进度条
        self.page_manager.update_progress(50)  # 这里的值可以根据实际需求进行修改

page_manager = PageManager(root)

page1 = Page(root, page_manager)
page2 = Page(root, page_manager)

page_manager.pages.append(page1)
page_manager.pages.append(page2)

def show_page(page):
    page.pack()
    
def hide_page(page):
    page.pack_forget()

button1 = tk.Button(root, text="页面1", command=lambda: show_page(page1))
button1.pack()

button2 = tk.Button(root, text="页面2", command=lambda: show_page(page2))
button2.pack()

root.mainloop()