httplib throw a proxy

[Glauco]

I'm using a library based on httplib.
Recently i've done a conversion for use of https with a key and 
certificate file. This goes perfectly :-) .

Now, the problem is passing throw an http_proxy.
It seems because httplib (based on socket.py) try to autenticate on the 
proxy.


I'm only with this problem ? it's impossible :-|

any ideas ?
thank's all
Glauco