I dunno man, python has always seemed a little bit worse on this stuff to me. At least with R if you had a consistent version, everything off CRAN worked togeth

I dunno man, python has always seemed a little bit worse on this stuff to me. At least with R if you had a consistent version, everything off CRAN worked together. I think R 3.0 introduced namespaces which fixed a lot of the really crazy stuff. Also, I was writing Sweave in 2010 for my thesis, and I definitely wasn't alone.