Mutator script

#!/usr/bin/python
#
# Usage:
#
# (0) Choose your games and check all
# three mutators
#
# (1) Enter the amount under "you save"
# (money, not percentage) into YOUSAVE1
#
# (2) Enter the cost of a single mutator
# into SINGLE_MUTATOR
#
# (3) Click CHECKOUT NOW
#
# (4) Enter the amount under "you save"
# into YOUSAVE2
#
# (5) Run script through Python interpreter
#
# Your amounts may differ due to local currency
# (mine are in Euro, sorry about that).

YOUSAVE1=13.20
SINGLE_MUTATOR=1.59
YOUSAVE2=33.10

PRECISION=1e-6

from collections import Counter
from sets import Set

def combo(val):
    (i,j,k)=val
    print("%.2f=%.2f+%.2f+%.2f"%(i+j+k,i,j,k))
    for i in range(3):
        print;
        print("Possible game #%d:"%(i+1))
        for j in a:
            if a[j]==val[i]:
                print("%s"%j)

def printkeys(n):
    for i in a:
        if a[i]==n:
            print(i,"\n")

a={'Megarace 1+2': 4.79,
   'Cannon Fodder 2': 4.79,
   'Banished': 15.89,
   'Sword of the Samurai': 4.79,
   'Rex Nebular': 4.79,
   'Capitalism 2': 7.99,
   'King of Dragon Pass': 4.79,
   'Wing Commander 1+2': 4.79,
   'Influx': 7.99,
   'Fist Puncher': 7.99,
   'Democracy 3': 19.89,
   'Divinity: Dragon Commander Imperial Edition': 35.69,
   'Blackwell Bundle': 11.89,
   'Legend of Grimrock': 11.89,
   'Eador: Genesis': 4.79,
   'Hotline Miami': 7.99,
   'Raven': 19.89,
   'Dark Eye: Chains of Satinav': 15.89,
   'Trine: Enchanted Edition': 11.89}
vals=a.values()
set=Set([])

mv=float(YOUSAVE2-YOUSAVE1+SINGLE_MUTATOR*3)
for i in vals:
    for j in vals:
        for k in vals:
            if (i<=j and j<=k and abs(mv-i-j-k)<PRECISION):
                set.add((i,j,k))
for val in set:
    combo(val)