python 监控键盘事件

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from pynput import keyboard   # 按下后执行 def on_press(key):     try:         if key == keyboard.KeyCode.from_char('enter'):             pass         elif key == keyboard.Key.left:             print("1")         elif key == keyboard.Key.right:             print("2")         elif key == keyboard.Key.up:             print("3")         elif key == keyboard.Key.down:             print("3")         elif key == keyboard.KeyCode.from_char('q'):             exit(-1)       except AttributeError:         print('special key {0} pressed'.format(key))     # 弹起时执行 def on_release(key):     print('{0} released'.format(key))     if key == keyboard.Key.esc:         return False     if __name__ == '__main__':     with keyboard.Listener(             on_press=on_press,             on_release=on_release) as listener:         listener.join()