Programmatic retweeting with Python's twitter library

I'm trying to programmatically retweet various tweets with Python's python-twitter library. The code executes without error, but the RT never happens. Here's the code:

from twitter import Twitter, OAuth

# my actual keys are here
OAUTH_TOKEN = ""
OAUTH_SECRET = ""
CONSUMER_KEY = ""
CONSUMER_SECRET = ""

t = Twitter(auth=OAuth(OAUTH_TOKEN, OAUTH_SECRET,
        CONSUMER_KEY, CONSUMER_SECRET))

result = t.statuses.retweets._id(_id=444320020122722304)

print(result)

The only output is an empty list. How can I get it to actually RT the tweet?

Solution

All of the answers posted here were instrumental in finding the final code that works. Thank you all! The code that works with the python-twitter library is below.

from twitter import Twitter, OAuth

# my actual keys are here
OAUTH_TOKEN = ""
OAUTH_SECRET = ""
CONSUMER_KEY = ""
CONSUMER_SECRET = ""

t = Twitter(auth=OAuth(OAUTH_TOKEN, OAUTH_SECRET,
        CONSUMER_KEY, CONSUMER_SECRET))

result = t.statuses.retweet(id=444320020122722304)

print(result)