무작위 문자열 생성
from itertools import product
chars = '0123456789QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm'
for length in range(1, 5):
to_attempt = product(chars, repeat=length)
for attempt in to_attempt:
brute = ''.join(attempt)
print brute