如何从入口小部件tkinter中删除单个字符？

import tkinter as tk

def delete_character():
    text = entry.get()  # 获取文本框中的当前文本内容
    text = text[:-1]  # 删除最后一个字符
    entry.delete(0, tk.END)  # 清空文本框
    entry.insert(0, text)  # 更新文本框的内容

root = tk.Tk()
entry = tk.Entry(root)
entry.pack()

button = tk.Button(root, text="删除字符", command=delete_character)
button.pack()

root.mainloop()