Setup:
#install homebrew ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)”
#install pyenv brew install pyenv
#install python 2.7.6 pyenv install 2.7.6
#install virtualenv pyenv global 2.7.6 pip install virtualenv
cd …/projectfolder
virtualenv env
source env/bin/activate # On Windows use env\Scripts\activate
pip install -r requirements.txt