 <p>A module in the Python natural language toolkit (nltk) does naïve Bayesian classification: <a href="http://nltk.googlecode.com/svn/trunk/doc/api/nltk.classify.naivebayes-module.html" rel="nofollow noreferrer"><code>nltk.classify.naivebayes</code></a>.</p> <p><em>Disclaimer:</em> I know crap all about Bayesian classification, naïve or worldly.</p>