code: def __getitem__(self, key):
      content = super().__getitem__(key)
      cls, kwargs = (
          content if isinstance(content, tuple) else (content, {})
      )
      return cls(**kwargs)
  
imports: import math
  import warnings
  from collections import OrderedDict
  import torch
  from packaging import version
  from torch import Tensor, nn
  from .utils import logging
label_desc: Use image node_id 1 for calling the ClassInstantier obj's underlying member method code with example usage: obj.__getitem__(key) and returns: cls