Install Numpy on Mac OS X Lion 10.7

Question

I need to install Numpy on my Mac OS X Lion 10.7. I googled a little bit, it seems like there are a lot of stuff needs to be installed. And some says I need install Xcode be

Answer 1

For anyone that hits this from google, here is where I figured out how to build numpy on Mac OS.

http://www.scipy.org/Installing_SciPy/Mac_OS_X

On lion, it amounts to setting some environment variables (after Xcode is installed):

export CC=gcc-4.2
export CXX=g++-4.2
export FFLAGS=-ff2c

Then pip install numpy works just fine.