For arrays/matrices I'm falling back to Fortran. It has builtin support to matrix/vector multiplication (and other operations of course). There's no need to ins

For arrays/matrices I'm falling back to Fortran. It has builtin support to matrix/vector multiplication (and other operations of course). There's no need to install other libraries, or to deal with virtualenvs, or package managers. Fortran is not that sold creepy thing from the 70s anymore, Fortran90 (and later) is pretty elegant IMO.