Shows the results of poll.

def tally_poll(args):
    """Shows the results of poll."""
    if not args.msg:
        return "Syntax: !vote tally <pollnum>"
    if not args.msg.isdigit():
        return "Not A Valid Positive Integer."
    pid = int(args.msg)
    poll = get_open_poll(args.session, pid)
    if poll is None:
        return "That poll doesn't exist or was deleted. Use !poll list to see valid polls"
    state = "Active" if poll.active == 1 else "Closed"
    votes = args.session.query(Poll_responses).filter(Poll_responses.pid == pid).all()
    args.send("%s poll: %s, %d total votes" % (state, poll.question, len(votes)))
    votemap = collections.defaultdict(list)
    for v in votes:
        votemap[v.response].append(v.voter)
    for x in sorted(votemap.keys()):
        args.send("%s: %d -- %s" % (x, len(votemap[x]), ", ".join(votemap[x])), target=args.nick)
    if not votemap:
        return ""
    ranking = collections.defaultdict(list)
    for x in votemap.keys():
        num = len(votemap[x])
        ranking[num].append(x)
    high = max(ranking)
    winners = (ranking[high], high)
    if len(winners[0]) == 1:
        winners = (winners[0][0], high)
        return "The winner is %s with %d votes." % winners
    else:
        winners = (", ".join(winners[0]), high)
        return "Tie between %s with %d votes." % winners