Build a Python environment on Mac (Mountain Lion)

#Install 2 series python
% brew install python

#Install 3 series python
% brew install python3

% pip install virtualenv virtualenvwrapper

#Specify python used by virtualenvwrapper
export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
#Even if you installed pip globally,Install the package in the virtualenv environment.
export PIP_RESPECT_VIRTUALENV=true
source "/usr/local/bin/virtualenvwrapper.sh"

#Create an environment called py2 that uses python2 series
% mkvirtualenv py2 --python /usr/local/bin/python2

#Create an environment called py3 that uses python3 series
% mkvirtualenv py3 --python /usr/local/bin/python3

#Check the created virtual environment
% lsvirtualenv
py2
===


py3
===


(py3)

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