numpy - npalko/npalko.github.com GitHub Wiki
http://stackoverflow.com/questions/4651683/numpy-grouping-using-itertools-groupby-performance
http://docs.scipy.org/doc/numpy/reference/arrays.interface.html
typestr
<: little-endian,
: big-endian, |: not-relevant
t Bit field b Boolean i Integer u Unsigned integer f Floating point c Complex floating point S String (fixed-length sequence of char) U Unicode
http://stackoverflow.com/questions/3410147/define-dtypes-in-numpy-using-a-list
TypeError: expected a readable buffer object
https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python easy install for pip
brew install umfpack pkg-config