title: The function 'bigrams' in python nltk not working
body: <p>The function bigrams from nltk is returning the following message, </p>
  
  <p></p>
  
  <p>even though nltk is imported and other functions from it are working. Any ideas? Thanks. </p>
  
  <pre><code>&gt;&gt;&gt; import nltk
  &gt;&gt;&gt; nltk.download()
  showing info http://www.nltk.org/nltk_data/
  True
  &gt;&gt;&gt; from nltk import bigrams
  &gt;&gt;&gt; bigrams(['more', 'is', 'said', 'than', 'done'])
  &lt;generator object bigrams at 0x0000000002E64240&gt;
  </code></pre>