计算一致性得分时出错– AttributeError:'dict'对象没有属性'id2token'

问题描述 投票:0回答:1

我是NLP的初学者,这是我第一次进行主题建模。我能够生成模型,但无法生成一致性度量。

将术语文档矩阵从df转换为新的gensim格式->稀疏矩阵-> gensim语料库

sparse_counts = scipy.sparse.csr_matrix(data_dtm)
corpus = matutils.Sparse2Corpus(sparse_counts)
corpus

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df_lemmatized.head()

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# Gensim also requires dictionary of the all terms and their respective location in the term-document matrix
tfidfv = pickle.load(open("tfidf.pkl", "rb"))
id2word = dict((v, k) for k, v in tfidfv.vocabulary_.items())
id2word

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这是我的模特:

lda = models.LdaModel(corpus=corpus, id2word=id2word, num_topics=15, passes=10, random_state=43)
lda.print_topics()

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最后,这是我尝试使用相干模型获得相干分数的地方:

# Compute Perplexity
print('\nPerplexity: ', lda.log_perplexity(corpus))  

# Compute Coherence Score
coherence_model_lda = CoherenceModel(model=lda, texts=df_lemmatized.long_title, dictionary=id2word, coherence='c_v')
coherence_lda = coherence_model_lda.get_coherence()
print('\nCoherence Score: ', coherence_lda)

这是错误:

---> 57,如果不是dictionary.id2token:#可能无法在标准gensim.corpora.Dictionary中初始化58 setattr(dictionary,'id2token',{v:k对于k,v在dictionary.token2id.items()}中)59AttributeError:“ dict”对象没有属性“ id2token”

python scipy nlp gensim topic-modeling
1个回答
0
投票

我没有您的数据,因此无法重现该错误。所以,我会猜一个!问题出在id2word内,应该是corpora.dictionary.Dictionary,而不仅仅是dict。因此,您需要执行以下操作:

>>> from gensim import corpora
>>>
>>> d = corpora.Dictionary()
>>> d.id2token = id2word
>>> #...
>>> # change `id2word` to `d`
>>> coherence_model_lda = CoherenceModel(model=lda, texts=df_lemmatized.long_title, dictionary=d, coherence='c_v')

而且我认为它现在应该可以正常工作!

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