如何使用pynput听字母键组合修改键？

from pynput import keyboard

def on_press(key):
    if isinstance(key, keyboard.KeyCode):
        # 检查是否同时按下了Ctrl和Shift键
        if key.char == 'a' and key.ctrl and key.shift:
            print("Ctrl+Shift+A 被按下")

def on_release(key):
    pass

with keyboard.Listener(on_press=on_press, on_release=on_release) as listener:
    listener.join()