python 爬虫 代理

import randomimport urllib.requestippools=[    "39.104.50.71:8080",    "39.104.50.160:8080",    "39.104.14.202:8080",    "39.104.50.137:8080",    "39.104.50.29:8080"]def ip(ippools):    thisip=random.choice(ippools)    print(thisip)    proxy=urllib.request.ProxyHandler({"http": thisip})    opener=urllib.request.build_opener(proxy,urllib.request.HTTPHandler)    urllib.request.install_opener(opener)

for i in range(0,5):    try:        ip(ippools)        url="http://www.baidu.com"        data=urllib.request.urlopen(url).read()        print(len(data.decode()))    except  Exception  as err:        print(err)