code: def _init_metrcis(self, preds):
      self.metrics = dict()
      mod = importlib.import_module(__name__)
      for key in preds:
          self.metrics[key] = getattr(mod, self.base_metric_name)(
              main_indicator=self.main_indicator, **self.kwargs
          )
          self.metrics[key].reset()
  
file_path: PaddleOCR/ppocr/metrics/distillation_metric.py
imports: import importlib
  import copy
  from .rec_metric import RecMetric
  from .det_metric import DetMetric
  from .e2e_metric import E2EMetric
  from .cls_metric import ClsMetric
  from .vqa_token_ser_metric import VQASerTokenMetric
  from .vqa_token_re_metric import VQAReTokenMetric
label_desc: Use image node_id 2 for calling the DistillationMetric obj's underlying member method code with example usage: obj._init_metrcis(preds) without return types