NZB is an XML-based file format for retrieving posts from NNTP
(Usenet) servers.

Since NZB is XML-based, it's relatively easy to build one-off parsers
to parse NZB files. This project is an attempt to consolidate those
many one-off NZB parsers into one simple interface.

WWW: http://pypi.python.org/pypi/pynzb/