Random Number Game | Python Fiddle

from random import randint

def check_answer(passcode, guess):
    """ Compare the guess to the generated passcode 
        Show which numbers were guessed correctly
    """
    
    compare = ['X','X','X']
    num_correct = 0
    
    for i in range(0,3):
        if passcode[i] == guess[i]:
            compare[i] = passcode[i]
            num_correct += 1
        else:
            pass
            
    print "You got %s numbers correct: %s" % (num_correct, ''.join(compare))
    
    if num_correct == 3:
        print "You win!"
        exit(1)
    else:
        pass
      
def keypad():
    """ Generate a random 3-digit passcode
        Provide 10 changes for the user to guess it
    """
    
    passcode = '%s%s%s' % (randint(1,9), randint(1,9), randint(1,9))
    num_guesses = 10
    
    while num_guesses > 0:
        guess = raw_input(">")
        
        if len(guess) != 3:
            print "That is not a 3 digit number, you just wasted a guess"
            num_guesses -= 1
            print "You have %d guesses left" % num_guesses
        else:
            check_answer(passcode, guess)
            num_guesses -= 1
            print "You have %d guesses left" % num_guesses
            pass
                
    print "You have used up all your guesses"
    print "The number was %s" % passcode
    exit(1)

print "I have randomly generated a three digit number. Try to guess it:"     
keypad()

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