我发现此错误“ NoneType”对象不可迭代

Question

这是我的代码：

similarity_score = []
for sentence1 in text:
    for sentence2 in text:
        if sentence1!=sentence2:
            sim_score = []
            temp2 = []
            sim = [[wn.word_similarity(word1,word2,'jcn') for word1 in sentence1] for word2 in sentence2]
            # s_sim = sum([sum(i) for i in zip(*sim)])
            s_sim = sum(sum_similarity(sim))
            sim_score.append(s_sim)
            # C_sim = content_sim(sentence1,sentence2)
            # sim_score.append(C_sim)
            # t_sim = sum([e/max(sim_score) for e in sim_score])
            t_sim = sum(sim_score)/len(sim_score)
            temp2.append(sentence1)
            temp2.extend((sentence2,t_sim))
            similarity_score.append(temp2)
return similarity_score

我遇到以下错误：

  

文件“ C：\ Users \ Waqar   Ahmad \ projects \ website \ website \ pages \ Sentence_similarity.py“，第83行，   相似地       s_sim = sum（sum_likeity（sim））TypeError：'NoneType'对象不可迭代[12 / Sep / 2019 22:02:51]“ POST   / genericbased_similaritymatrix HTTP / 1.1“ 500 371830