code: def bytes(self):
          
          byteout = bytearray()
          for i in range(1, 15):
              key = 'd' + str(i)
              if self._userdata[key] is not None:
                  byteout.append(self._userdata[key])
              else:
                  byteout.append(0x00)
          return byteout
docs: Emit the address in bytes format.