def get_machine_group(self, project_name, group_name):
        """ get machine group in a project
        Unsuccessful opertaion will cause an LogException.

        :type project_name: string
        :param project_name: the Project name 

        :type group_name: string
        :param group_name: the group name to get

        :return: GetMachineGroupResponse
        
        :raise: LogException
        """

        headers = {}
        params = {}
        resource = "/machinegroups/" + group_name
        (resp, headers) = self._send("GET", project_name, None, resource, params, headers)
        return GetMachineGroupResponse(resp, headers)