NumPy is a replacement of Numeric Python that adds the features of numarray. To install: python setup.py install The setup.py script will take advantage of fast BLAS on your system if it can find it. You can help the process with a site.cfg file. If fast BLAS and LAPACK cannot be found, then a slower default version is used. The most current development version is always available from a subversion repostiory: http://svn.scipy.org/svn/numpy/trunk