#python3.4爬网页图片### 代码批量自动下载豆瓣网首页图片：``` pythonimport urllib.requestimport retargetDir = 'D:/Photo ' #文件保存路径if __name__== '__main__':  #程序运行入口    weburl = 'http://www.**.com'    webheaders = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}     req = urllib.request.Request(url=weburl, headers=webheaders)  #构造请求报头    webpage = urllib.request.urlopen(req)  #发送请求报头    contentBytes = webpage.read().decode('utf-8')    imglist=re.findall(r'<img src="([^"]+)"', str(contentBytes))    for each in imglist:        filename =targetDir+ each.split('/')[-1]        urllib.request.urlretrieve(each, filename,None)```