Password Guesser Project

[RedSkeleton007]

For now, I need an iterator that points to the chars in my AlphaNum string properly. We will start out with a password of just one char in length. Observe the code below:

#!/usr/bin/env python3
#PasswordGuesser.py

AlphaNum = "abc"
guess = ""
#bool guessMatches = false
password = "b"
guessLength = len(guess)
guessLength = 1 #start with a guess length of just one char

def iterateAlphaNum():
    i = 0
    while i < len(AlphaNum):
        guess[0] == AlphaNum[i]
        i += 1


#Master While Loop: while the last char of the guess string has not yet passed
#the last char in AlphaNum
while guess[len(guess)-1] !> AlphaNum[len(AlphaNum)-1]:
    guess[0] = iterateAlphaNum()
    if guess == password:
        guessMatches = true

Of course, I don't want the while loop to stop BEFORE it tries the last char (c from AlphaNum). That's why I've tried in vein use the invalid syntax of !> (not greater than, therefore hasn't already stopped after reaching the last char in AlphaNum).

Any suggestions?