字体更改菜单按钮不会在tkinter文本编辑器中切换字体

import tkinter as tk
from tkinter import ttk

def change_font():
    selected_font = font_combo.get()
    text.configure(font=selected_font)

root = tk.Tk()
root.title("文本编辑器")

# 创建字体更改菜单按钮
font_label = ttk.Label(root, text="字体：")
font_label.pack(side=tk.LEFT)

font_combo = ttk.Combobox(root, values=("Arial", "Times New Roman", "Courier New"))
font_combo.pack(side=tk.LEFT)
font_combo.current(0)

change_button = ttk.Button(root, text="更改字体", command=change_font)
change_button.pack(side=tk.LEFT)

# 创建文本编辑器
text = tk.Text(root)
text.pack()

root.mainloop()