The pyspf Python module has been released as version 2.0. pyspf 2.0 
was the first SPF implementation to fully conform to RFC 4408. This 
release has also added IPv6 support. pyspf is the library behind 
several of the open SPF project's SPF record testing tools.

Currently part of the pymilter project: http://pymilter.sourceforge.net

WWW: https://pypi.python.org/pypi/pyspf