code: def test_macro_bleu_nltk_smooth2(candidates, references):
      _test(
          candidates,
          references,
          "macro",
          "nltk_smooth2",
          SmoothingFunction().method2,
      )
  
imports: import os
  import warnings
  from collections import Counter
  import pytest
  import torch
  from nltk.translate.bleu_score import corpus_bleu, sentence_bleu, SmoothingFunction
  import ignite.distributed
  from ignite.exceptions import NotComputableError
  from ignite.metrics.nlp import Bleu
  from .None import CorpusForTest
label_desc: Use image node_id 7 for calling a global function with example usage: test_macro_bleu_nltk_smooth2(candidates, references) without return types