这代码为什么报错，哪里的毛病？

源码如下：
import urllib.request, urllib.parse, urllib.error, urllib.request, urllib.error, urllib.parse, sys
host = 'http://www.wx-dwz.cn'
path = 'sina.php?url_long='
method = 'GET'
querys = 'url=http%3A%2F%2Fwww.baidu.com'
bodys = {}
url = host + path + '?' + querys
request = urllib.request.Request(url)
response = urllib.request.urlopen(request)
content = response.read()
if (content):
print(content)

........ get addressinfo faild

url = host + path + '?' + querys # 打印url，并直接用浏览器访问是否有此地址