code: def __init__(self, metric: Callable):
      self.metric = metric
  
file_path: BigDL/python/nano/src/bigdl/nano/utils/pytorch/metric.py
imports: from typing import Callable
  import torch
  from torch import nn
  from torch.utils.data import DataLoader
  import numpy
label_desc: Use image node_id 1 to create a new NanoMetric object from inherited base classes: object with example: obj = NanoMetric(metric)