code: def test_SizedDict_iter():
      d = SizedDict(data={"a": 2, "b": 5, "c": 10})
      assert list(iter(d)) == ["a", "b", "c"]
  
file_path: espnet/test/espnet2/utils/test_sized_dict.py
imports: import multiprocessing
  import sys
  import numpy
  import pytest
  import torch.multiprocessing
  from espnet2.utils.sized_dict import SizedDict, get_size
label_desc: Use image node_id 6 for calling a global function with example usage: test_SizedDict_iter() without return types