title: ValueError: cannot compute LDA over an empty collection (no terms)
body: <p>Getting this error in python when trying to compute lda for a smaller size of corpus but works fine in other cases.</p>
  
  <p>The size of corpus is 15 and I tried setting the number of topic to 5 then reduced it to 2 but it still gives the same error : <strong>ValueError: cannot compute LDA over an empty collection (no terms)</strong></p>
  
  <p>getting error at this line :     <code>lda = models.LdaModel(corpus, num_topics=topic_number, id2word=dictionary, passes=passes)</code></p>
  
  <p>where corpus is <code>corpus = [dictionary.doc2bow(text) for a, id, text, s_date, e_date, qd, qd_perc in texts]</code></p>
  
  <p>Why is it giving no terms?</p>