How to access the internet through a proxy configuration script?

I want to install some ruby gems and some python libraries ( preferably using easy_install ) on some computers. It's an easy enough job, but the开发者_开发百科 thing is, I need to use a proxy to do so. I know how to install using a proxy, but, for example, to surf the web, these computers are using a proxy configuration script, which points to .pac file.

Can I make the tools connect to the internet using this pac file?