How to install numpy, scipy and scikit-learn on OS X 10.9 Mavericks

numpy_os_x_10_9.sh

# Pre-requsites:
# X-code 5.0.1 with command line tools
# Homebrew, homebrew python, homebrew pip

export CFLAGS="-arch i386 -arch x86_64"
export FFLAGS="-m32 -m64"
export LDFLAGS="-Wall -undefined dynamic_lookup -bundle -arch i386 -arch x86_64"
export CC=gcc-4.2
export CXX="g++ -arch i386 -arch x86_64"
brew install gfortran
brew install apple-gcc42
pip install cython

#use existing brews
brew tap samueljohn/python
brew tap homebrew/science
pip install nose

#installs numpy as a dependency
brew install scipy

pip install scikit-learn