# To setup virtualenvwrapper
pip install virtualenvwrapper
...
export WORKON_HOME=~/Envs
mkdir -p $WORKON_HOME
source /usr/local/bin/virtualenvwrapper.sh
mkvirtualenv env1
# if virtualenv wrapper is setup, you can make an env using
mkvirtualenv env1
mkvirtualenv env2
# you can switch using
workon env2
# you can also confirm your environment
echo $VIRTUAL_ENV