title: Exclude retweets from twitter streaming api using tweepy
body: <p>When using the python <code>tweepy</code> library to pull tweets from twitter's streaming API is it possible to exclude retweets?</p>
  
  <p>For instance, if I want only the tweets posted by a particular user ex: <code>twitterStream.filter(follow = ["20264932"])</code> but this returns retweets and  I would like to exclude them. How can I do this? </p>
  
  <p>Thank you in advance.</p>