code: def corpus_bleu(sys_stream, ref_streams):
      bleu = _corpus_bleu(sys_stream, ref_streams, tokenize="none")
      return bleu.score
  
file_path: fairseq/examples/translation_moe/score.py
imports: import argparse
  import random
  import sys
  from itertools import chain
  import numpy
  import sacrebleu
  from sacrebleu import corpus_bleu
label_desc: Use image node_id 6 for calling a global function with example usage: corpus_bleu(sys_stream, ref_streams) and returns: bleu