gistfile1.py

def submit_to_scraperwiki(identity, title, latitude, longitude, url):
    result = {"id" : identity, "title" : title, "latitude" : latitude, "longitude" : longitude, "url" : url}
    scraperwiki.sqlite.save(UNIQUE_KEYS, result, 'kittens')

what does the UNIQUE_KEYS stand for? Please explain its use. In your tutorial I saw no reference to it, but you code contains a dict with the same name.