Brew python virtualenv

1. install brew
  ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
2. 
  export PATH=/usr/local/bin:/usr/local/sbin:$PATH
3. install python
  brew install python
4. 
  export PATH=/usr/local/share/python:$PATH
5. virtualenv virtualenvwrapper
  pip install virtualenv virtualenvwrapper
6. Configure ~./bashrc, add
  export WORKON_HOME=$HOME/.virtualenvs
  export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python2.7
  source /usr/local/bin/virtualenvwrapper.sh
7. Reload bash
  source ~/.bashrc