python - 如何检测 pynput 中的按键/释放

Question

我正在使用pynput来检测keypress释放，但我想在释放特定键时执行一些不同的代码。

这是我的代码:

1   from pynput import keyboard
2
3   def on_press(key):
4        try:
5           print('Key {0} pressed'.format(key.char))
6           #Add your code to drive motor
7       except AttributeError:
8           print('Key {0} pressed'.format(key))
9           #Add Code
10  def on_release(key):
11      print('{0} released'.format(key))
12      #Add your code to stop motor
13      if key == keyboard.Key.esc:
14          # Stop listener
15          # Stop the Robot Code
16          return False
17      if key == keyboard.Key.Qkey:
18          print ("fviokbhvxfb")
19
20  # Collect events until released
21  with keyboard.Listener(
22          on_press=on_press,
23          on_release=on_release) as listener:
24      listener.join()

他们指出哪个不起作用:

if key == keyboard.Key.Qkey:
    print ("fviokbhvxfb")`

可能我的问题是Qkey。

我已经写在第17行我应该用什么替换它？我试图检测 q 是否被释放并按下，并且仅当按下它而不是其他东西时才执行一些代码。

Answer 1

你可以这样做:

def on_release(key):
    print('{0} released'.format(key))
    #Add your code to stop motor
    if key == keyboard.Key.esc:
        # Stop listener
        # Stop the Robot Code
        return False
    if 'char' in dir(key):     #check if char method exists,
        if key.char == 'q':    #check if it is 'q' key
            print("fviokbhvxfb")