Message 189918 - Python tracker

This is fixed in 3.4. I dont think backporting is a good idea just to support assignment to .full_url. Thinking of this further, the idea of reusing request by assigning to .full_url may not be a good idea, because if you set .full_url to a completely different URL from different host, the request becomes meaningless.  

Closing this issue as the enhancement is done.