如何在tkinter画布上创建文本并更改画布中的文本？

import tkinter as tk

def change_text():
    canvas.itemconfig(text_item, text="New Text")

root = tk.Tk()

canvas = tk.Canvas(root, width=200, height=200)
canvas.pack()

text_item = canvas.create_text(100, 100, text="Hello World", font=("Arial", 12))

button = tk.Button(root, text="Change Text", command=change_text)
button.pack()

root.mainloop()