code: def __init__(
      self,
      name: str,
      short_name: Optional[str] = None,
      prefix: str = "",
  ) -> None:
      self._name = prefix + name
      self._short_name = (
          prefix + short_name if short_name else self._name
      )
      self._sum = 0.0
      self._num_inst = 0.0
  
imports: import logging
  import math
  from abc import ABC, abstractmethod
  from typing import Any, Dict, Optional, Tuple
  import torch
  import numpy
  from .None import constants
  from .None import utils
label_desc: Use image node_id 1 to create a new LossMetric object from inherited base classes: ABC with example: obj = LossMetric(name, short_name, prefix)