intstr 0.12

int encode to string & string decode to int , can use in url shorten with a auto incr id

for example:

import string

ALPHABET = string.ascii_uppercase + string.ascii_lowercase +                string.digits + '-_'


intstr = IntStr(ALPHABET)

s = intstr.encode(1234567)
print s
print intstr.decode(s)


intstr = IntStr(ALPHABET,"$")

s = intstr.encode(-1234567)
print s
print intstr.decode(s)