title: List of list of words by Python:
body: <p>Having a long list  of comments (50 by saying) such as this one:   </p>
  
  <blockquote>
    <p>"this was the biggest disappointment of our trip. the restaurant had
    received some very good reviews, so our expectations were high. the
    service was slow even though the restaurant was not very full. I had
    the house salad which could have come out of any sizzler in the us.
    the keshi yena, although tasty reminded me of barbequed pulled
    chicken. this restaurant is very overrated".</p>
  </blockquote>
  
  <p>I want to create a list of list of words retaining sentence tokenization using python.  </p>
  
  <p>After removing stopwords I want a result for all 50 comments in which sentence tokens are retained and word tokens are retained into each tokenized sentence. At the end I hope result being similar to:  </p>
  
  <pre><code>list(c("disappointment", "trip"), 
       c("restaurant", "received", "good", "reviews", "expectations", "high"), 
       c("service", "slow", "even", "though", "restaurant", "full"),
       c("house", "salad", "come", "us"), 
       c("although", "tasty", "reminded", "pulled"), 
       "restaurant")  
  </code></pre>
  
  <p>How could I do that in python? Is R a good option in this case? I really will appreciate your help.</p>