f287a04243fb8cbe966161c106dce14fac274a6c,ch12/libbots/utils.py,,calc_bleu,#Any#Any#Any#,15

Before Change

    :param ref_seq:
    :return:
    
    score = 0.0

    for n in range(1, max_n_grams+1):
        cand_ngrams = list(iterate_n_grams(cand_seq, n=n))
        cand_counts = collections.Counter(cand_ngrams)
        ref_counts = collections.Counter(iterate_n_grams(ref_seq, n=n))
        for item, count in cand_counts.items():
            if item in ref_counts:
                score += min(count, ref_counts[item]) / len(cand_ngrams)
    score /= max_n_grams
    return score

After Change

    // score /= min(max_n_grams, len(ref_seq))
    // return score
    return bleu_score.sentence_bleu(
        [tuple(ref_seq)], cand_seq, [1/max_n_grams for _ in range(max_n_grams)])

Instances