Python oslo_config.cfg 模块，DictOpt() 实例源码

def __metric_opts(self):
        """List of options to be used in metric defined sections"""
        return [
            cfg.StrOpt("metric_name",
                       help="Metric Name used to log monitoring information"
                            " in Monasca",
                       required=True),
            cfg.DictOpt("dimensions",
                        default={},
                        help="Dict that contains dimensions information. "
                             "component:nova-compute,service:compute",
                        ),
            cfg.StrOpt("aggregate",
                       choices=["any", "all"],
                       help="How to consider the compute node is down. If you "
                            "metric reports many states, like checking "
                            "different services on the compute host, should we"
                            " consider if one component down all are down or"
                            " only if all components are down. Default is all."
                            " This means if all components fail, freezer-dr"
                            " will consider the host failed",
                       default='all'
                       ),
            cfg.StrOpt("undetermined",
                       choices=['OK', 'ALARM'],
                       default='ALARM',
                       help="How to handle UNDETERMINED states. It can be "
                            "ignored, will be considered OK state or can be "
                            "considered ALARM. Default is ALARM")

        ]