Speeding up Brute force password guesser

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Hi, I'm new to python and was wondering how I could speed up my brute force password guesser. I just started python this summer so sorry if it isn't very python-ish

Here's my code:

#imports (im not insulting your inteligence, im just new. :) )

import string, time

#sets printables

var = 3
if var == 1:
   printable = list(string.printable)
   for i in range(5):
       del printable[-1]
elif var == 2:
   printable = list(str(string.ascii_uppercase + string.ascii_lowercase))
elif var == 3:
   printable = list(string.ascii_lowercase)

#variable assignment

password = raw_input("What is the password? -> ")
guess = [printable[0]]
place = 0
limit = 8
correct = False

#sees if the current guess is correct, returns true if so

def ispass():
   if "".join(guess) == password:
       return True
   else:
       return False

#reverts all elements of guess list to first element of printables

def zitup():
   for i in range(len(guess)):
       guess[i] = printable[0]
   guess.append(printable[0])

#moves inncorrect guess to the next string

def next():
   if guess[place] == printable[-1]:
       guess[place] = printable[0]
   else:
       try:
           guess[place] = printable[printable.index(guess[place])+1]
       except ValueError:
           print(guess, place)
#if ispass() returns false detects if all elements of guess are the last element of printable, if so exicutes zitup(), else sets the next non last element of printables to the next possible element

while len(guess) < limit:
   correct = ispass()
   if correct:
       break
   else:
       place = len(guess)-1
       while guess[place] == printable[-1] and place > -1:
           guess[place] = printable[0]
           place += -1
       if place < 0:
           zitup()
           print("Char added")
       else:
           next()

#prints correct guess, or incorrect if len(guess) exceded limit

print("The password is: " + "".join(guess))