NumPy

*NumPy is the fundamental package for Scientific Computing with Python. It contains among other things:

• a powerful N-dimensional array object
• sophisticated (broadcasting) functions
• tools for integrating C/C++ and Fortran code
• useful Linear Algebra, Fourier Transform, and Random Number capabilities*

http://www.numpy.org/

http://en.wikipedia.org/wiki/NumPy

SciPy builds on it.

100 exercises http://www.loria.fr/~rougier/teaching/numpy.100/