title: While lemmatizing the corpus and splitting and joining it , it shows Word List Corpus Reader not callable error
body: <p>My code where I get error goes as follows :</p>
  <pre><code>import re
  corpus = []
  for i in range(len(sentences)):
     review = re.sub('[^a-zA-z]', ' ',sentences[i])
     review = review.lower()
     review = review.split()
     review = [lemmatize.lemmatize(word) for word in review if not word in     # getting error 
                                                                             # in this statement  
     set(stopwords('english'))]                                                  
     review = ' '.join(review)  
     corpus.append(review) 
  </code></pre>
  <p>I am unable to find what Word List Corpus Reader is and not knowing how to use it, just saw this using tutorials. What is the correct syntax and how do I resolve this error?</p>