Python Gensim-LdaMallet除法误差

我试图复制gensim中木槌包装器的教程

当我将模型与

model = models.LdaMallet(mallet_path, corpus, num_topics=10, id2word=corpus.dictionary)

我收到一条错误消息：

C:\Anaconda\lib\site-packages\gensim\models\ldamallet.py:234: RuntimeWarning: invalid value encountered in divide topic = topic / topic.sum() # normalize to probability dist

当我使用模型推断示例的主题分布时，分布是一致的：

doc = "Don't sell coffee, wheat nor sugar; trade gold, oil and gas instead."
bow = corpus.dictionary.doc2bow(utils.simple_preprocess(doc))
print model[bow]

我的输出：

[(0, 0.10000000000000002), (1, 0.10000000000000002), (2, 0.10000000000000002), (3, 0.10000000000000002), (4, 0.10000000000000002), (5, 0.10000000000000002), (6, 0.10000000000000002), (7, 0.10000000000000002), (8, 0.10000000000000002), (9, 0.10000000000000002)]

这是包装器的功能问题还是木槌的问题？我在这里复制了mallet教程：