Python virtualenvwrapper

postactivate

#!/bin/bash
# This hook is run after every virtualenv is activated.

#create project directory and cd into it
env_name="`basename \"$VIRTUAL_ENV\"`"
env_name="${env_name/-py3/}"
pwd_root="$HOME/Sites/$env_name"
if [ ! -d "$pwd_root" ] ; then
    echo "Creating directory $pwd_root"
    mkdir "$pwd_root"
fi
cd "$pwd_root"

#colorful env name
PS1="\[\033[33m\](`basename \"$VIRTUAL_ENV\"`)$_OLD_VIRTUAL_PS1"

This hook will create a folder with the same name as the virtual environment in ~/Sites/. If the name contains -py3, that's stripped from the name. This allows you to share a folder for between Python 2 and 3 virtual environments.

The last command uses some lively colors for the name of the virtual environment in your prompt.