pygtk如何替换开关上选项卡的内容-页面

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

def on_switch_page(notebook, widget, page_num):
    # 当选项卡切换时的回调函数
    print("Switched to page", page_num)

def replace_page(notebook, old_page, new_page, index):
    # 替换选项卡的内容-页面
    notebook.remove_page(index)
    notebook.insert_page(new_page, Gtk.Label("New Page"), index)

def main():
    window = Gtk.Window()
    window.connect("destroy", Gtk.main_quit)

    notebook = Gtk.Notebook()
    notebook.connect("switch-page", on_switch_page)

    # 创建初始的内容-页面
    page1 = Gtk.Label("Page 1")
    page2 = Gtk.Label("Page 2")

    # 添加初始的选项卡
    notebook.append_page(page1, Gtk.Label("Page 1"))
    notebook.append_page(page2, Gtk.Label("Page 2"))

    # 替换选项卡的内容-页面
    new_page = Gtk.Label("New Page")
    replace_page(notebook, page2, new_page, 1)

    window.add(notebook)
    window.show_all()

    Gtk.main()

if __name__ == "__main__":
    main()