• Numpy numerical library

  Numpy Reference
  Numpy mathematical functions




• Matplotlib graphics library

  http://matplotlib.org/




• Continuum Analytics Anaconda Python downloads

  https://www.continuum.io/downloads




• Learn Python the Hard Way: a primer with attitude!

  http://learnpythonthehardway.org/book/

Please let me know about other references you find to be useful. I will add them to the list.