data: a dict received from nni_manager, which contains:
              - 'parameter_id': id of the trial
              - 'value': metric value reported by nni.report_final_result()
              - 'type': report type, support {'FINAL', 'PERIODICAL'}

def handle_report_metric_data(self, data):
        """
        data: a dict received from nni_manager, which contains:
              - 'parameter_id': id of the trial
              - 'value': metric value reported by nni.report_final_result()
              - 'type': report type, support {'FINAL', 'PERIODICAL'}
        """
        if data['type'] == 'FINAL':
            self._handle_final_metric_data(data)
        elif data['type'] == 'PERIODICAL':
            if self.assessor is not None:
                self._handle_intermediate_metric_data(data)
            else:
                pass
        else:
            raise ValueError('Data type not supported: {}'.format(data['type']))