def sentence_bleu(hypothesis, reference):
bleu = _corpus_bleu(hypothesis, reference)
for i in range(1, 4):
bleu.counts[i] += 1
bleu.totals[i] += 1
bleu = compute_bleu(
bleu.counts, bleu.totals,
bleu.sys_len, bleu.ref_len, smooth_method='exp'
)
return bleu.score
def corpus_bleu(sys_stream, ref_streams):
bleu = _corpus_bleu(sys_stream, ref_streams, tokenize="none")
return bleu.score