Taken from: [https://groups.google.com/forum/#!topic/devpi-dev/S-3ioWILTiY]).
We wanted to do some python developpement but we had a problem : our working network is completely isolated from any internet access, only having servers providing services like distribution packages repository mirror and web servers. The question then was how to make a full pypi mirror for usig pip install and pip search.
This is possible to be done using devpi, a web server, bandersnatch and an external hard drive. The idea is to dump all pypi packages with bandersnatch, transfer them to the server with the hard drive,