You can use twython, which allows you to access the Twitter API and collect the list of retweeter IDs with the following code:
from twython import Twython
twitter = Twython(APP_KEY, APP_SECRET,OAUTH_TOKEN, OAUTH_TOKEN_SECRET)
search = twitter.get_retweeters_ids(id=327473909412814850)
for result in search["ids"]:
print result
The get_retweeters_ids()
function takes the same arguments as the Twitter API call, which is the id of the Tweet you want to track. The result is a JSON object that contains the retweeter IDs in the field "ids".
I hope this helps.