gistfile1.py

import string
from random import sample

rand_strings = set()
string_count = 100
string_len = 8
string_prefix = ""

char_choices = string.uppercase + string.digits

while len(rand_strings) < string_count:
  s = string_prefix + "".join(sample(char_choices, 8))
  rand_strings.add(s)
  print s

# do wahtever with rand_srings