python: fetch tweets by tweepy's Cursor but this stops before it reaches the end..

gistfile1.py

# -*- coding: utf-8 -*-
import tweepy

consumer_token = ''
consumer_secret = ''
access_token = ''
access_secret = ''


def get_tweets(api, screen_name):
    for tweet in tweepy.Cursor(api.user_timeline, screen_name = screen_name).items():
        yield tweet


def main():
    screen_name = sys.argv[1]

    auth = tweepy.OAuthHandler(consumer_token, consumer_secret)
    auth.set_access_token(access_token, access_secret)
    api = tweepy.API(auth_handler=auth)

    for tweet in get_tweets(api, screen_name):
        print (tweet.id_str + u"\t" + tweet.text + u"\t" + str(tweet.created_at)).encode('utf-8') # print as utf-8 for redirection.

if __name__ == "__main__":
    main()