Simple Password Generator (Python recipe) by Isendrak Skatasmid

ActiveState Code (http://code.activestate.com/recipes/578125/)

#!/usr/bin/python
# -*- coding: utf-8 -*-
from os import urandom

charsets={
"a":"abcdefghijklmnopqrstuvwxyz",\
"A":"ABCDEFGHIJKLMNOPQRSTUVWXYZ",\
"0":"0123456789",\
"$":"^!\"$%&/()=?{[]}+*~#'-_.:,;<>|\\ "\
}

def GeneratePassword(length=5,charset="aA0"):
	password="";lc="";charset_string=""
	for c in charset:
		if c in charsets.keys():
			charset_string+=charsets[c]
	while len(password)<length:
		c=urandom(1)
		if c in charset_string and c!=lc:
			password+=c;lc=c
	return password

if __name__=="__main__":
	print GeneratePassword(15,"aA0")