当输入框大于tkinter中的窗口高度时，如何添加滚动条？

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
scrollbar = ttk.Scrollbar(root)

canvas = tk.Canvas(root, yscrollcommand=scrollbar.set)
scrollbar.config(command=canvas.yview)

frame = ttk.Frame(canvas)

canvas.create_window(0, 0, anchor='nw', window=frame)

input_box = ttk.Entry(frame)
input_box.pack()

scrollbar.pack(side='right', fill='y')
canvas.pack(side='left', fill='both', expand=True)

frame.bind('<Configure>', lambda event: canvas.configure(scrollregion=canvas.bbox('all')))

root.mainloop()