code: def get(self) -> float:
      return (
          self._sum / self._num_inst if self._num_inst else float("nan")
      )
  
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 7 for calling the LossMetric obj's underlying member method code with example usage: obj.get() and returns: unknown