Задача 2

#coding: utf-8
import zipfile

alphabet = [chr(i) for i in range(ord('a'), ord('z') + 1)]
for i in range(10):
    alphabet.append(str(i))

def brute_crack_zip(file):
    z = zipfile.ZipFile(file, 'r')
    def next_pwd(p = ''):
        for alpha in alphabet:
            new_p = p + alpha
            try:
                z.extractall(pwd=new_p)
                return p
            except Exception as e:
                pass
            if len(new_p) < 8:
                next_pwd(new_p)
    res = next_pwd()
    if type(res) == 'str':
        z.close()
        return res
    z.close()
    return 'not found'