set up python3 environment

sudo apt-get update
sudo apt-get install python3-pip python3-dev
sudo apt-get install build-essential libssl-dev libffi-dev python-dev

set up virtualenv

sudo pip3 install virtualenv virtualenvwrapper
echo "export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3" >> ~/.bashrc
echo "export WORKON_HOME=~/Env" >> ~/.bashrc
echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
source ~/.bashrc