code: def __getitem__(self, k):
      if isinstance(k, str):
          inner_dict = {k: v for (k, v) in self.items()}
          return inner_dict[k]
      else:
          return self.to_tuple()[k]
  
imports: from collections import OrderedDict
  from dataclasses import dataclass
  import tempfile
  import unittest
  import torch
  from torch import nn
  from fairscale.fair_dev.testing.testing import dist_init
  from fairscale.nn import FullyShardedDataParallel
  from fairscale.nn import auto_wrap, enable_wrap
label_desc: Use image node_id 3 for calling the ModelOutput obj's underlying member method code with example usage: obj.__getitem__(k) and returns: inner_dict, self