def __command_handler__(self, msg_command):
        # cli is a dict with the following structure:
        """
        msg_command = {
                "type"	:		"sys/customized",
                "operation"	:	"operation_name",
                "kwargs"	:	"suppose that the operation is a function,
                                    we need to pass some arguments",
                "token"		:	"the token is used to verify the authentication
                                    of the operation"
        }
        """
        print(msg_command)
        try:
            msg_command = pickle.loads(msg_command)
            if not isinstance(msg_command, dict):
                return
        except Exception as e:
            traceback.print_exc()
            print(e)
        if msg_command["type"] == "sys":
            if hasattr(self, msg_command["operation_name"]):
                func = getattr(self, msg_command["operation_name"])
                try:
                    print(msg_command["kwargs"])
                    result = func(**msg_command["kwargs"])
                except Exception as e:
                    traceback.print_exc()
                    self.logger.error(e)

        msg_command = {
                "type"	:		"sys/customized",
                "operation"	:	"operation_name",
                "kwargs"	:	"suppose that the operation is a function,
                                    we need to pass some arguments",
                "token"		:	"the token is used to verify the authentication
                                    of the operation"
        }
        
dHydra/core/Worker.py