$ sudo easy_install pip
$ sudo pip install virtualenv
$ sudo pip install virtualenvwrapper
$ echo "WORKON_HOME=~/.envs" >> ~/.bashrc
$ echo "PROJECT_HOME=~/Projects" >> ~/.bashrc
$ echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
$ source ~/.bashrc
mkvirtualenv -a ~/Projects/<project name> --no-site-packages <project name>
OR specify python version
mkvirtualenv -p /usr/bin/python3 -a ~/Projects/<project name> --no-site-packages <project name>