Python参数，必需1参数

Question

我正在开发一个zip文件密码破解程序，我需要一个暴力破解选项。我已经写出了它的基本代码，但我不确定如何使用参数使其工作。我如何写一个论证来使这项工作？

import optparse
import zipfile
import argparse
from threading import Thread

parser = argparse.ArgumentParser()
parser.add_argument("-b", "--brute")

def extract_zip(zFile, password):
    try:
        password_encoded = bytes(password.encode('utf-8'))
        zFile.setpassword(password_encoded)
        zFile.testzip()
        print ("[+] Password Found: " + password + '\n')
    except:
        pass

def Main():
        parser = optparse.OptionParser("useage &prog "+\
                        "-f <zipfile> -d <dictionary> / -b <brute force>")

        parser.add_option('-f', dest='zname', type='string',\
                        help='specify zip file')
        parser.add_option('-d', dest='dname', type='string',\
                        help='specify dictionary file')
        parser.add_option('-b', dest='bname', type='string',\
                        help='specify brute force')
        (options, arg) = parser.parse_args()
        if (options.zname == None) | (options.dname == None) | (options.bname == None):
                print (parser.usage)
                exit(0)
        else:
                zname = options.zname
                dname = options.dname
                bname = options.bname

        zFile = zipfile.ZipFile(zname)
        passFile = open(dname)
        brute = open(bname)

        for line in passFile.readlines():
            password = line.strip('\n')
            t = Thread(target=extract_zip, args=(zFile, password))
            t.start()

        if args.brute:
            characters = '1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM'
            for length in range(1, int(args.brute)):
                to_attempt = product(characters, repeat=length)
                t = Thread(target=extract_zip, args=(zFile, password))
                t.start()

if __name__ == '__main__':
    Main()