A new panel named "Network" allowing to define proxy setting should be added.

(Alternatively, the "Extensions" panel could be extended.)

Settings like "hostname" and "port" should be available.

Qt support

As reported in [1], underlying call should be:

<pre> QNetworkProxy::setApplicationProxy(QNetworkProxy(QNetworkProxy::HttpProxy, "hostname.of.my.proxy", 8080));</pre>

Python support

Generally speaking the env variable "http_proxy" should be set.
See https://docs.python.org/2/library/urllib.html#high-level-interface

Otherwise, there is also solution like this one for urllib2:

import urllib2

<pre>
proxy_support = urllib2.ProxyHandler({"http":"http://61.233.25.166:80&quot;})
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)
</pre>
Source: http://stackoverflow.com/questions/5620263/using-an-http-proxy-python