code: def keyUp(key, pause=None, _pause=True):
      
      if len(key) > 1:
          key = key.lower()
  
      _failSafeCheck()
      platformModule._keyUp(key)
  
      _autoPause(pause, _pause)
docs: Performs a keyboard key release (without the press down beforehand).
  
      Args:
        key (str): The key to be released up. The valid names are listed in
        KEYBOARD_KEYS.
  
      Returns:
        None