Python Virtual Environment Config

python.sh

# Python environment
export WORKON_HOME=$HOME/.virtualenvs
export PROJECT_HOME=$HOME/Projects

# Set up virtual wrapper env
source /usr/local/bin/virtualenvwrapper.sh

# for testing, set pytest to verbose by default
alias pytest='pytest -v'

# when switching to a new directory, this will set the python 
# virtual environment to the contents of a file called .venv 
# located in that directory.  That virtual environment will
# remain active until you switch to another directory with a
# .venv file.  You can still use deactivate or workon to
# to change/deactivate the virtual environment

export PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND$'\n'}python_venv_prompt"
function python_venv_prompt()
{
    if [ "$PWD" != "$MYOLDPWD" ]; then
        MYOLDPWD="$PWD"
        test -e .venv && workon `cat .venv`
    fi
}