def _internal_is_attached()

in ignite/metrics/metrics_lambda.py [0:0]

• 14 lines of code
• 10 McCabe index (conditional complexity)

    def _internal_is_attached(self, engine: Engine, usage: MetricUsage) -> bool:
        # if no engine, metrics is not attached
        if engine is None:
            return False
        # check recursively if metrics are attached
        is_detached = False
        for metric in itertools.chain(self.args, self.kwargs.values()):
            if isinstance(metric, MetricsLambda):
                if not metric._internal_is_attached(engine, usage):
                    is_detached = True
            elif isinstance(metric, Metric):
                if not engine.has_event_handler(metric.started, usage.STARTED):
                    is_detached = True
                if not engine.has_event_handler(metric.iteration_completed, usage.ITERATION_COMPLETED):
                    is_detached = True
        return not is_detached