mastermind.py

# -*- coding: utf-8 -*-
"""
Created on Sat Mar 12 12:32:53 2016

@author: bioid
"""
from random import choice

colors = ['R', 'Y', 'G', 'B']

slots = [choice(colors) for x in range(4)]

def hits(guess, solution):
    hits = 0
    pseudo = 0
    for i in range(4):
        if guess[i] == solution[i]:
            hits += 1
        elif guess[i] in solution:
            pseudo += 1  
    return hits, pseudo

def parseInput(string):
    return [x for x in string.upper()]

while True:    
    print('Enter a guess:')
    
    num_hits, pseudohits = hits(parseInput(input()), slots)
    if num_hits == 4:
        print('You win! The answer was: %s' %''.join(x for x in slots))
        break
    else:
        print('hits: %s, pseudohits: %s' %(num_hits, pseudohits))