title: Installing NLTK in Python 2.7 when it already exists in Python 3
body: <p>I am trying to install NLTK package in Python 2.7 - I already have it installed in Python 3. So every time I run :</p>
  
  <p><code>sudo pip install nltk</code> </p>
  
  <p>I get:</p>
  
  <blockquote>
    <p>Requirement already satisfied: nltk in
    /anaconda/lib/python3.6/site-packages</p>
    
    <p>Requirement already satisfied: six in
    /anaconda/lib/python3.6/site-packages (from nltk)</p>
  </blockquote>
  
  <p>How do i specifically install <code>nltk</code> in python 2.7 instead?</p>
  
  <p>Thanks a lot!</p>
  
  <p>Jay</p>