调用返回的文件对象的 .geturl() 方法.根据 urllib2 文档:

Call the .geturl() method of the file object returned. Per the urllib2 docs:

geturl() — 返回检索到的资源的 URL，通常用于确定是否遵循重定向

geturl() — return the URL of the resource retrieved, commonly used to determine if a redirect was followed

示例:

import urllib2
response = urllib2.urlopen('http://tinyurl.com/5b2su2')
response.geturl() # 'http://***.com/'