如何在单击提交按钮后清除或刷新OptionMenu

import tkinter as tk

def clear_option_menu(option_menu):
    option_menu['menu'].delete(0, 'end')

def refresh_option_menu(option_menu, options):
    clear_option_menu(option_menu)
    for option in options:
        option_menu['menu'].add_command(label=option, command=tk._setit(option_menu, option))

def submit_button_clicked():
    refresh_option_menu(option_menu, [])

root = tk.Tk()

options = ['Option 1', 'Option 2', 'Option 3']
selected_option = tk.StringVar()
selected_option.set(options[0])

option_menu = tk.OptionMenu(root, selected_option, *options)
option_menu.pack()

submit_button = tk.Button(root, text='Submit', command=submit_button_clicked)
submit_button.pack()

root.mainloop()