56讲中的问题

不想再努力球

      和视频中的代码是一样 但我做到find_img这步只会像图片这样显示

不想再努力球

import urllib.request
import os

def url_open(url):
    req = urllib.request.Request(url)
    req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.26 Safari/537.36 Core/1.63.5796.400 QQBrowser/10.2.2144.400')
    response = urllib.request.urlopen(url)
    html = response.read()

    return html


def get_page(url):
    html = url_open(url).decode('utf-8')
   
   
    a = html.find('current-comment-page') + 23
    b = html.find(']',a)

    return html[a:b]

   
def  find_imgs(url):
    html = url_open(url).decode('utf-8')
    img_addrs = []
   
    a = html.find('img src=')

    while a != -1:      
        b = html.find('.jpg',a,a+255)
        if b != -1:
            img_addrs.append(html[a+9:b+4])
        else:
            b= a+9

        a = html.find('img src=',b)

    for each in img_addrs:
        print(each)
        
   

def save_imgs(folder,img_addrs):
    pass


def download_mm(folder = 'ooxx',pages=10):
    os.mkdir(folder)
    os.chdir(folder)

    url = 'http://jandan.net/ooxx/'
    page_num = int(get_page(url))

    for i in range(pages):
        page_num -= i
        page_url = url + 'page-' + str(page_num) + '#comments'
        img_addrs = find_imgs(page_url)
        save_imgs(folder,img_addrs)



if __name__ == '__main__':
    download_mm()