def user_talk_vandal_vocab_ratio(editinfo):
    username = editinfo['user']
    revision_count = user_talk_revision_count(username)
    if revision_count == 0:
        return 0
    vandal_vocab_count = user_talk_vandal_vocab_count(username)
    return float(vandal_vocab_count) / revision_count
def user_talk_vandal_vocab_ratio(username):
    revision_count = user_talk_revision_count(username)
    if revision_count == 0:
        return 0
    vandal_vocab_count = user_talk_vandal_vocab_count(username)
    return float(vandal_vocab_count) / revision_count