Pynput似乎无法处理大写锁定键

Question

在Windows 10和Python 3.7中使用pynput，返回的字符代码反映了程序启动时大写锁定键的状态。对该键的更改不会导致返回值的更改。

from pynput import keyboard
def on_release(key):
    print('{0} released'.format(key))
    if key == keyboard.Key.esc:
        # Stop listener
        return False

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

在使用大写锁定的情况下运行时，我得到：

'A' released
Key.caps_lock released
'A' released
Key.esc released
Aa
>>> 

因此，大写锁定已关闭。重新启动，我得到

=== RESTART: C:/Users/davec/Documents/Perkins/Browser/tests/pynput-kbd.py ===
'a' released
Key.caps_lock released
'a' released