如何使用tkinter创建像Ctrl+s这样的热键？

from tkinter import *
from tkinter import ttk
from tkinter import messagebox
from tkinter import filedialog
from pynput import keyboard

root = Tk()
root.title("热键示例")

def on_hotkey():
    # 在这里编写热键触发后的操作
    print("热键 Ctrl+S 被触发")

def on_press(key):
    if key == keyboard.Key.ctrl_l or key == keyboard.Key.ctrl_r:
        # 监听Ctrl键的按下事件
        is_ctrl_pressed = True
    elif key == keyboard.KeyCode.from_char('s') and is_ctrl_pressed:
        # 监听Ctrl+S组合键的按下事件
        on_hotkey()

def on_release(key):
    if key == keyboard.Key.ctrl_l or key == keyboard.Key.ctrl_r:
        # 监听Ctrl键的释放事件
        is_ctrl_pressed = False

# 创建键盘监听器
listener = keyboard.Listener(on_press=on_press, on_release=on_release)
listener.start()

root.mainloop()

from tkinter import *
from tkinter import ttk
from tkinter import messagebox
from tkinter import filedialog
from pynput import keyboard

root = Tk()
root.title("热键示例")

def on_hotkey():
    # 在这里编写热键触发后的操作
    print("热键 Ctrl+S 被触发")

def on_press(key):
    if key == keyboard.Key.ctrl_l or key == keyboard.Key.ctrl_r:
        # 监听Ctrl键的按下事件
        is_ctrl_pressed = True
    elif key == keyboard.KeyCode.from_char('s') and is_ctrl_pressed:
        # 监听Ctrl+S组合键的按下事件
        on_hotkey()

def on_release(key):
    if key == keyboard.Key.ctrl_l or key == keyboard.Key.ctrl_r:
        # 监听Ctrl键的释放事件
        is_ctrl_pressed = False

# 创建键盘监听器
listener = keyboard.Listener(on_press=on_press, on_release=on_release)
listener.start()

root.mainloop()