How to use the psychtoolbox.hid.Keyboard function in psychtoolbox

def __init__(self, bufferSize, kb_id):
        self.bufferSize = bufferSize
        self._evts = deque()

        # create the PTB keyboard object and corresponding queue
        allInds, names, keyboards = hid.get_keyboard_indices()

        self._keys = []
        self._keysStillDown = []

        if kb_id == -1:
            self.dev = hid.Keyboard()  # a PTB keyboard object
        else:
            self.dev = hid.Keyboard(kb_id)  # a PTB keyboard object
        self.dev._create_queue(bufferSize)