Thank you Travis for Numpy, Scipy..... While doing my Master thesis, I was stuck with compiled Fortran density function theory (DFT)  code using shell script. I didnt know how to extend, modify and add extra calculation I needed. Then I came across a python DFT library (gpaw) and within few month with help of Numpy, Scipy I was able to finished it. I started programming in python without learning it at all !! I fell in love with python since then.,(reply>), Tell Thomas I referred you to him.....