code: def __init__(
      self,
      prefix: str = "",
      name: str = C.PERPLEXITY,
      short_name: str = C.PERPLEXITY_SHORT_NAME,
  ) -> None:
      super().__init__(prefix=prefix, name=name, short_name=short_name)
  
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 PerplexityMetric object from inherited base classes: LossMetric with example: obj = PerplexityMetric(prefix, name, short_name)