def create_reg_message(self):
        """ Creates a registration message to identify the worker to the interchange
        """
        msg = {'parsl_v': PARSL_VERSION,
               'python_v': "{}.{}.{}".format(sys.version_info.major,
                                             sys.version_info.minor,
                                             sys.version_info.micro),
               'os': platform.system(),
               'hname': platform.node(),
               'dir': os.getcwd(),
        }
        b_msg = json.dumps(msg).encode('utf-8')
        return b_msg
Creates a registration message to identify the worker to the interchange