access_token = 'your_token'
access_secret = 'your_secret_token'
auth = tweepy.OAuthHandler(api_key, api_secret)
auth.set_access_token(access_token, access_secret)
api = tweepy.API(auth)
for status in api.user_timeline('someuser'):
    api.retweet(status.id)
Sending out twitter retweets with Python