discover redirected url

[Miko]

how does one determine a redirected url?

for example:

  http://tinyurl.com/3apbd

is redirected to:

  http://www.cbsnews.com/stories/2004/03/18/sunday/main607191.shtml

using httplib, i get a HTTPResponse object, but there is nothing in there
that shows the redirection, including the msg member.

is there a way to determine a redirected url using the standard Python
libraries?