SimpleRec
Simple Recommendation Engine in Python
Based on the Correlated Cross Occurrence originally put forth by Ted Dunning
And the Mahout version:
https://github.com/apache/mahout/blob/08e02602e947ff945b9bd73ab5f0b45863df3e53/spark/src/test/scala/org/apache/mahout/cf/SimilarityAnalysisSuite.scala#L49 https://github.com/apache/mahout/blob/08e02602e947ff945b9bd73ab5f0b45863df3e53/math/src/test/java/org/apache/mahout/math/stats/LogLikelihoodTest.java#L50 https://github.com/apache/mahout/blob/4f2108c576daaa3198671568eaa619266e787b1a/math/src/main/java/org/apache/mahout/math/stats/LogLikelihood.java#L1