Install new Python versions
pyenv install 2.7.13
Anytime we install a new Python version, we immediately install virtualenvwrapper
# switch versions
pyenv shell 2.7.13
# install virtualenvwrapper_lazy
pyenv virtualenvwrapper_lazy
Then to actually use the virtualenv
# create a new virtualenv
mkvirtualenv my_environment
# disable virtualenv
deactivate
# list all environments
workon
# reactivate virtualenv
workon my_environment