Python3.4编程实现简单抓取爬虫功能示例

import urllib.requestimport urllib.parseimport reimport urllib.request,urllib.parse,http.cookiejarimport timedef getHtml(url):  cj=http.cookiejar.CookieJar()  opener=urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))  opener.addheaders=[('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36'),('Cookie','4564564564564564565646540')]  urllib.request.install_opener(opener)  page = urllib.request.urlopen(url)  html = page.read()  return html#print ( html)#html = getHtml("http://weibo.com/")def getimg(html):  html = html.decode('utf-8')  reg='"screen_name":"(.*?)"'  imgre = re.compile(reg)  src=re.findall(imgre,html)  return src#print ("",getimg(html))uid=['2808675432','3888405676','2628551531','2808587400']for a in list(uid):  print (getimg(getHtml("http://weibo.com/"+a)))  time.sleep(1)