Connecting to internet under proxy

[Chema]

Hi all.

   I have a little script to connect to the internet and download some
files. I developed it in my house (direct connection) and it wordked
properly. But the problem is that in the office (under a proxy) it
doesn't run. My script is like:

import urllib
f=urllib.urlopen(SOME_WEB)
print f.read

I have tried to set the environmet variable
http_proxy="192.168.1.100:2929" and also:

import urllib
proxy={'http','http://192.168.1.100:2929'} and using
f=urllib.urlopen(SOME_WEB, proxy)
print f.read

the error was always the same:

(11001, 'getaddrinfo failed')


Any idea?? The proxy that we use is normally, in some programs I use a
tipical http proxy without authentification without problem.

Thanks in advanced.

Bye