new_contents: from twython import Twython, TwythonStreamer, TwythonError
  
  APP_KEY = ''
  APP_SECRET = ''
  OAUTH_TOKEN = ''
  OAUTH_TOKEN_SECRET = ''
  
  class MyStreamer(TwythonStreamer):
      def on_success(self, data):
      	if 'event' in data and 'target' in data and 'source' in data:
      		if data['event'] == 'follow' and data['target']['screen_name'] == 'FutureDiaryBot':
      			twitter = Twython(APP_KEY, APP_SECRET, OAUTH_TOKEN, OAUTH_TOKEN_SECRET)
      			try:
      				twitter.create_friendship(user_id = data['source']['id'])
      				print 'auto followed @' + data['source']['screen_name']
      			except TwythonError as error:
      				print error
  
      def on_error(self, status_code, data):
          print status_code, data
  
  def main():
  	stream = MyStreamer(APP_KEY, APP_SECRET, OAUTH_TOKEN, OAUTH_TOKEN_SECRET)
  	stream.user()
  
  main()
  
subject: Create followback.py