danwerner/multimethodic — pull request #6 by weissjeffm (2014-02-25 23:39:33+00:00)
Title: Add prefer, add isa? behavior to match ancestor types

I tried a half dozen multimethod libs for python, and all of them were hopelessly broken. This was the closest one, all it was missing was being able to match ancestor types (like `object` with `str`). Also added the prefer method, was just a straight port of clojure's implementation. Tried to get it as close to clojure's behavior as possible, all that's left is thread safety and caching.