1.主要学习这程序的编写思路

a.读取解释网站

b.找到相关页

c.找到图片链接的元素

d.保存图片到文件夹

.....

将每一个步骤都分解出来,然后用函数去实现,代码易读性高.

##代码尽快运行时会报错,还须修改

 

import urllib.requestimport osdef url_open(url):    #读取解释    req = urllib.request.Request(url) #   req.add_header(\'User-Agent\',\'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36\')    response = urllib.request.urlopen(req)    html = response.read()    return htmldef get_page(url):   #找到相关页    html = url_open(url)    a = html.find('current-comment-page')    b = html.find(a)    return html[a:b]def find_imgs(url):  #找到图片链接的元素    html = url_open(url)    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')    return img_addrsdef save_imgs(folder, img_addrs):   #保存图片到文件夹    for each in img_addrs:        filename = each.split('\'/\'')        with open(filename,'wb') as f:            img =url_open(each)            f.write(img)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(img_addrs)if __name__ == '__main__':    download_mm()