code: def __init__(
      self,
      spec_featurizer: MelSpectrogramFeaturizer,
      feature_name: str = "energy",
  ) -> None:
      self.feature_name = feature_name
      self.spec_featurizer = spec_featurizer
  
imports: import math
  from abc import ABC, abstractmethod
  from pathlib import Path
  from typing import Any, Dict, List, Optional, Tuple, Union
  import librosa
  import numpy
  import torch
  from torch import Tensor
  from nemo.collections.asr.modules import AudioToMelSpectrogramPreprocessor
  from nemo.collections.tts.parts.utils.tts_dataset_utils import get_audio_filepaths, normalize_volume, stack_tensors
  from nemo.utils.decorators import experimental
label_desc: Use image node_id 1 to create a new EnergyFeaturizer object from inherited base classes: Featurizer with example: obj = EnergyFeaturizer(spec_featurizer, feature_name)