second implem of k-anon
grouping transactions by similarity
s1=[1,8,3,9,4,9,3,8,1,2,3] s2=[1,8,1,3,9,4,9,3,8,1,2,3] sm=difflib.SequenceMatcher(None,s1,s2) sm.ratio()
https://stackoverflow.com/questions/6709693/calculating-the-similarity-of-two-lists