title: 401 error while using tweepy
body: <p>I am running the below program.But am getting the below error Message.
  401 ****
  401 ****
  (keeps on repeating)</p>
  
  <p>The code(got from some forum) basically tries to connect to Twitter and fetch tweets.
  When its ran on ubuntu terminal the 401 error message appear.</p>
  
  <pre><code>import sys
  import json
  import pymongo
  import tweepy
  consumer_key="XX" ##all the keys and codes have to be strings
  consumer_secret="XX"
  access_token = "XX"
  access_token_secret = "XX"
  # This is the listener, resposible for receiving data
  
  class StdOutListener(tweepy.StreamListener):
  
      def on_data(self, data):
  
          # Twitter returns data in JSON format - we need to decode it first
  
          decoded = json.loads(data)
  
  
  
          # Also, we convert UTF-8 to ASCII ignoring all bad characters sent by users
  
          print '@%s: %s' % (decoded['user']['screen_name'], decoded['text'].encode('ascii', 'ignore'))
  
          print ''
  
          return True
  
  
  
      def on_error(self, status):
  
          print status
  
  
  
  if __name__ == '__main__':
  
      l = StdOutListener()
  
      auth = tweepy.OAuthHandler(consumer_key, consumer_secret)
  
      auth.set_access_token(access_token, access_token_secret)
  
  
  
      print "Showing all new tweets for #programming:"
  
  
  
      # There are different kinds of streams: public stream, user stream, multi-user streams
  
      # In this example follow #programming tag
  
      # For more details refer to https://dev.twitter.com/docs/streaming-apis
  
      stream = tweepy.Stream(auth, l)
  
      stream.filter(track=['programming'])
  </code></pre>