Modified-elo-algorithm/Modified_elo_algorithm_implementaion_in_py.py at master · DeepAgrawal/Modified-elo-algorithm · GitHub

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#! /usr/bin/env python
# -*- coding: utf-8 -*-

import math
import random

# Function to calculate the Probability
def Probability(rating1, rating2):
  return 1.0 * 1.0 / (1 + 1.0 * math.pow(10, 1.0 * (rating1 - rating2) / 400))

#Function to claculate the new player's rating
def EloRating(Ra, Rb, K, Sa, Sb, name1, name2):

    # To calculate the Winning Probability of Player B
    Pb = Probability(Ra, Rb)

    # To calculate the Winning Probability of Player A
    Pa = Probability(Rb, Ra)

    # To calculate the Performance Multiplier
    P1 = Sa / ( Sa + Sb )
    P2 = Sb / ( Sa + Sb )

    oRa = Ra
    oRb = Rb

    # Case -1 When Player A wins
    # Updating the Player's Ratings
    if (Sa>Sb) :
        Ra = Ra + K * P1*(1 - Pa)
        Rb = Rb + K * P2*(0 - Pb)


    # Case -2 When Player B wins
    # Updating the Elo Ratings
    else :
        Ra = Ra + K * P1*(0 - Pa)
        Rb = Rb + K * P2*(1 - Pb)

    # Assigning Leagues to the players
    # To player A
    if Ra<1200:
      league_a = 'Unranked'
    elif 1200<Ra<2400:
      league_a = 'Gold'
    elif 2400<Ra<3500:
      league_a = 'Diamond'
    elif Ra>3500:
      league_a = 'Master'

    #To Player B
    if Rb<1200:
      league_b = 'Unranked'
    elif 1200<Rb<2400:
      league_b = 'Gold'
    elif 2400<Rb<3500:
      league_b = 'Diamond'
    elif Rb>3500:
      league_b = 'Master'

    Ra = str(round(Ra, 2))
    Rb = str(round(Rb, 2))
    oRa = str(round(oRa, 2))
    oRb = str(round(oRb, 2))
    Sa = str(Sa)
    Sb = str(Sb)
    print("Player\tScore\tOld Rating\tNew Rating\tNew League")
    print(name1+"\t"+Sa+"\t"+oRa+"         "+Ra+"         "+league_a)
    print(name2+"\t"+Sb+"\t"+oRb+"         "+Rb+"         "+league_b)
    if Sa>Sb:
      print("Winner: "+name1)
    elif Sb>Sa:
      print("Winner: "+name2)
    elif Sa==Sb:
      print("Draw")

array=[] #Data-set storage

for x in range(100): #Makes a data-set
	array.append(['p'+str(x+1), random.uniform(800, 5000)])

for x in range(len(array)): # Giving players their leagues
	if array[x][1]>3500:
		array[x].append('Master')
	elif 2400<array[x][1]<3500:
		array[x].append('Diamond')
	elif 1200<array[x][1]<2400:
		array[x].append('Gold')
	elif 800<array[x][1]<1200:
		array[x].append('unranked')

n = int(input("Number of online players: "))
online = [x for x in input('Give space seprated names of players: ').split()]
Master = []
Diamond = []
Gold = []
unranked = []
dict_ = {x[0]:[x[1], x[2]] for x in array}

for x in online:
    if dict_.get(x)[1]=='Master':
        Master.append([x, *dict_.get(x)])
    elif dict_.get(x)[1]=='Gold':
        Gold.append([x, *dict_.get(x)])
    elif dict_.get(x)[1]=='Diamond':
        Diamond.append([x, *dict_.get(x)])
    elif dict_.get(x)[1]=='unranked':
        unranked.append([x, *dict_.get(x)])

leagues = [Master, Diamond, Gold, unranked]

for x in leagues:
    if len(x)==1:
        print("Waiting: "+str(x[0][0]))
    elif len(x)==0:
        pass
    else:
        if len(x)&1:
            print("Waiting: "+str(x[len(x)-1][0]))
            x.pop(len(x)-1)
        for y in range(0, len(x), 2):
            score_a = int(input("Give score of Player "+str(x[y][0])+" for this Match: "))
            score_b = int(input("Give score of Player "+str(x[y+1][0])+" for this Match: "))
            EloRating(x[y][1], x[y+1][1], 30, score_a, score_b,x[y][0], x[y+1][0])


input("Hit any key to exit.")