GOIO leaderboard calculations season 1 (v3)

#!/usr/bin/env python3

import json
import sys
from collections import OrderedDict

PARTICIPATION_POINTS = 2
TOURNAMENT_MAX_POINTS = 11
RANK_1_MULTIPLIER = 1
RANK_2_MULTIPLIER = 2
RANK_3_MULTIPLIER = 3
NO_RANK_MULTIPLIER = 4


clanlist = {}
ranking = []
sumpoints = 0


class Clan():
    '''Clan object holding information about points and rank.'''

    def __init__(self, name):
        '''Initialize Clan object. Use get_clan instead.'''
        self.points = 0
        self.rank = 0
        self.name = name

def get_clan(name):
    '''Retrieves Clan object from global dictionary or creates new object
    with all necessary initializations.'''

    try:
        return clanlist[name]
    except KeyError:
        clan = Clan(name)
        clanlist[name] = clan
        ranking.append (clan)
        return clan


class Tournament():
    '''Tournament object. Invoke finish method after adding all participants
    to update ranking. '''

    count = 0

    def __init__(self, name, participants):
        self.name = name
        self.participants = participants
        Tournament.count += 1

    def add(self, clan, wins, place):
        global sumpoints

        #
        # Add points based on place
        #
        # addpoints = TOURNAMENT_MAX_POINTS - place
        # if addpoints > 0:
        #     clan.points += addpoints
        #     sumpoints += addpoints
        #     # clan.points += addpoints/self.participants
        #     # sumpoints += addpoints/self.participants

        #
        # Diminishing returns system
        #
        addpoints = 0
        if wins == 0:
            addpoints += PARTICIPATION_POINTS
        else:
            if clan.rank == 1:
                addpoints = wins*RANK_1_MULTIPLIER
            elif clan.rank == 2:
                addpoints += wins*RANK_2_MULTIPLIER
            elif clan.rank == 3:
                addpoints += wins*RANK_3_MULTIPLIER
            else:
                addpoints += wins*NO_RANK_MULTIPLIER
        clan.points += addpoints
        sumpoints += addpoints

    def finish(self):
        # print("\n", self.name, sep = "")
        # if Tournament.count == 100:
        #     update_ranks(True)
        #     self.reset()
        # else:
        update_ranks()

    def reset(self):
        # print("reset")
        Tournament.count = 0
        del ranking[:]
        clanlist.clear()


def update_ranks(show = False):
    ranking.sort(key = lambda x: x.points, reverse = True)

    rank = 0
    prevpoints = -1
    # print(ranking[0].name, "first")
    for clan in ranking:
        if prevpoints != clan.points:
            rank += 1
            prevpoints = clan.points
        # elif rank == 1:
        #     print("same:", clan.name)
        clan.rank = rank
        if show:
            print("%2d: %12s %4s)" % (clan.rank, clan.name, "(" + str(clan.points)))
    if show:
        print()


def load_data(file):
    with open (file) as f:
        # OrderedDict to keep key/values in order for ranking
        return json.load(f, object_pairs_hook = OrderedDict)


if __name__ == "__main__":
    try:
        filename = sys.argv[1]
    except IndexError:
        filename = "leaderboard.json"

    json = load_data(filename)
    for tournament in json["Leaderboard"]:
        eventobj = json["Leaderboard"][tournament]
        event = Tournament(tournament, eventobj["participants"])
        update = True
        skip = False

        if "options" in eventobj:
            opts = eventobj["options"]
            if "skip" in opts and opts["skip"]:
                skip = True
                continue
            if "update" in opts and not opts["update"]:
                update = False


        clans = eventobj["clans"]
        for clan in clans:
            event.add(get_clan(clan), clans[clan]["wins"], clans[clan]["place"])

        if not skip and update:
            event.finish()

    rank = 0
    prevpoints = -1
    for clan in ranking:
        if prevpoints != clan.points:
            rank += 1
            prevpoints = clan.points
        # normalized display
        # print("%2d: %12s %4s%%)" % (clan.rank, clan.name, "(" + str(round(clan.points*100/sumpoints, 2))))
        print("%2d: %12s %4s)" % (clan.rank, clan.name, "(" + str(clan.points)))