code: def listen_ttf(self, target, timeout):
          
          return super(Device, self).listen_ttf(target, timeout)
docs: Listen *timeout* seconds for a Type F card activation. The target
          ``brty`` must be set to either 212F or 424F and ``sensf_res``
          provide 19 byte response data (response code + 8 byte IDm + 8
          byte PMm + 2 byte system code). Note that the maximum command
          an response frame length is 64 bytes only (including the frame
          length byte), because the driver must directly program the
          contactless interface unit within the PN533.