python 下载指定网页上得图片

# -*- coding: utf-8 -*-import osimport reimport urllibURL_REG = re.compile(r'(http://[^/\\]+)', re.I)IMG_REG = re.compile(r'<img[^>]*?src=([\'"])([^\1]*?)\1', re.I)def download(dir, url):    global URL_REG, IMG_REG    m = URL_REG.match(url)  #IMG_REG    if not m:        print '[Error]Invalid URL: ', url        return    host = m.group(1)    if not os.path.isdir(dir):        os.mkdir(dir)    #获取html，提取图片url    html = urllib.urlopen(url).read()    imgs = [ item[1].lower() for item in IMG_REG.findall(html) ]        f = lambda path: path if path.startswith('http://') else \        host + path if path.startswith('/') else url + '/' + path        imgs = list(set(map(f, imgs)))    print '[Info]Find %d images.' % len(imgs)    #下载图片    for idx, img in enumerate(imgs):        name = img.split('/')[-1]        path = os.path.join(dir, name)        try:            print '[Info]Download(%d): %s' % (idx+1, img)            urllib.urlretrieve(img, path)        except:            print "[Error]Can't download(%d): %s" % (idx+1, img)#运行从这里开始，第一个参数是保存路径，第二个参数是网址savePath = 'E://Imgs'questHTTP = "http://www.qiushibaike.com/"download(savePath, questHTTP)

其实是想下载淘宝网站上的图片，可惜淘宝不让下！