code: def create_metrics_calcer(self, metrics, thread_count, eval_step=1):
      if not os.path.exists(self._model_path):
          raise CatBoostError(
              "Model was deleted. Can't create calcer now"
          )
      model = CatBoost()
      model.load_model(self._model_path)
      return model.create_metric_calcer(
          metrics, thread_count=thread_count, eval_period=eval_step
      )
  
file_path: catboost/catboost/python-package/catboost/eval/_fold_model.py
imports: import os
  from ..None import CatBoostError, CatBoost
label_desc: Use image node_id 3 for calling the FoldModel obj's underlying member method code with example usage: obj.create_metrics_calcer(metrics, thread_count, eval_step) and returns: model