alphanumeric random code generator len(8)

"""
this algorithm is created by Alejandro Romero @alejo8591 MIT or BSD licensed
"""

from random import randint

class UserCode:

def __init__(self):
 return

def getUserIDNumber(self):
 return self.userIDNumber

def setUserIDNumber(self, userIDNumber):
 try:
 if (type(userIDNumber)==type('str')):self.userIDNumber = str(userIDNumber)
 except:
 raise TypeError, "UserCodes requires a String but was given %s" % type(userIDNumber)
 return self.userIDNumber

def generateCodes(self, userIDNumber):
 i=0, alphabet = ('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'),numeric =('1','2','3','4','5','5','7','8','9','0'),alphanumeric = (alphabet, numeric)
 codes,position = [], 0
 for i in range(20):
 j,code=0,''
 for j in range(8):
 option = randint(0,1)
 if option == 0:code += alphanumeric[option][randint(0,25)]
 else:code += alphanumeric[option][randint(0,9)]
 codes.append(code)
 return codes