Preferencial voting system simulator based on the australian voting system.

Preferencial Voting System Sim.py

from copy import deepcopy
from random import shuffle

PARTIES = [
    "LNP", "ALP", "GRN", "ASP", "BKAP", 
    "ON",  "WLP", "PAP", "FF",  "CD"
]

# functions

def gen_preferences():
    prefences = deepcopy(PARTIES); shuffle(prefences)
    return prefences

def reset(_dict):
    for key in _dict:
        _dict[key] = 0

def inc_key(_dict, key):
    _dict[key] = _dict[key] + 1
    return _dict

def most(_dict, comparison):
    most, by = deepcopy(_dict).popitem()
    for key in _dict:
        if comparison(_dict[key], by):
            most = key
            by = _dict[key]
    return most
 
def losing(_dict):
    return most(_dict, lambda a, b: a < b)

def winning(_dict):
    return most(_dict, lambda a, b: a > b)

def count_votes(preference_s, votes_for_parties):
    reset(votes_for_parties)
    for preference in preference_s:
        inc_key(votes_for_parties, preference[0])

# simulation

SHOW_PROCESS = True

LOOK_UP = {
     "LNP": "Liberial Nation Party",
     "ALP": "Australian Labor Party",
     "GRN": "Greens",
     "ASP": "Australian Sex Party",
    "BKAP": "Bob Katters Australia Party",
      "ON": "One Nation",
     "WLP": "Wikileaks Party",
     "PAP": "Palmers Austrlia Party",
      "FF": "Family First",
      "CD": "Christian Democrats"
}

party_votes = {
    "LNP": 0, "ALP": 0, "GRN": 0, "ASP": 0, "BKAP": 0, 
    "ON": 0,  "WLP": 0, "PAP": 0, "FF": 0,  "CD": 0
}

preferences = []
voting_round = 0


for i in range(0, 10):
    preferences.append(gen_preferences())

while len(party_votes) > 1:    
    count_votes(preferences, party_votes)
    loser = losing(party_votes)
    party_votes.pop(loser)

    if SHOW_PROCESS: 
        voting_round += 1
        print("\nROUND", voting_round, "\n")
        print("Least Votes:", LOOK_UP[loser])
        print("Most Votes: ", LOOK_UP[winning(party_votes)], "\n")

    for preference in preferences: 
        if SHOW_PROCESS: print(preference)
        preference.remove(loser)
     
# result

print("\nThe " + LOOK_UP[winning(party_votes)] + " has won the election")