python - この TFIDF コードがすべての単語に対して 0 の頻度を出力するのはなぜですか?

Question

私は yebrahim からこの tfidf を取得しましたが、どういうわけか私の出力ドキュメントは結果に対してすべて 0 を生成します。これに問題はありますか？出力の例は、hippo 0.0 hipper 0.0 hip 0.0 Hint 0.0hindsight 0.0 hill 0.0 hilarious 0.0 です。

助けてくれてありがとう

    # increment local count
    for word in doc_words:
        if word in terms_in_doc:
            terms_in_doc[word] += 1
        else:
            terms_in_doc[word]  = 1

    # increment global frequency
     for (word,freq) in terms_in_doc.items():
        if word in global_term_freq:
            global_term_freq[word] += 1
        else:
            global_term_freq[word]  = 1

     global_terms_in_doc[f] = terms_in_doc

print('working through documents.. ')
for f in all_files:

    writer = open(f + '_final', 'w')
    result = []
    # iterate over terms in f, calculate their tf-idf, put in new list
    max_freq = 0;
    for (term,freq) in global_terms_in_doc[f].items():
        if freq > max_freq:
            max_freq = freq
    for (term,freq) in global_terms_in_doc[f].items():
        idf = math.log(float(1 + num_docs) / float(1 + global_term_freq[term]))
        tfidf = float(freq) / float(max_freq) * float(idf)
        result.append([tfidf, term])

    # sort result on tfidf and write them in descending order
    result = sorted(result, reverse=True)
    for (tfidf, term) in result[:top_k]:
        if display_mode == 'both':
            writer.write(term + '\t' + str(tfidf) + '\n')
        else:
            writer.write(term + '\n')