Command to activate / create Python virtual environmment

venv.zsh

# venv
# usage:
#   $ venv .recsys
function venv {
    default_envdir=".env"
    envdir=${1:-$default_envdir}

    if [ ! -d $envdir ]; then
        python3.7 -m virtualenv -p python3.7 $envdir
        echo -e "\x1b[38;5;2m✔ Created virtualenv $envdir\x1b[0m"
        source $envdir/bin/activate
        echo -e "\x1b[38;5;2m✔ Activated virtualenv $envdir\x1b[0m"
        pip install ipython ipykernel jupyter jupyterlab black flake8
        echo -e "\x1b[38;5;2m✔ Installed packages \x1b[0m"
        python -m ipykernel install --user --name=$envdir --display-name="Python 3.7 ($envdir)"
        echo -e "\x1b[38;5;2m✔ Created kernel 'Python3.7 ($envdir)'\x1b[0m"
        export PYTHONPATH=$(pwd)
    fi
    
    if [ -d $envdir ]; then
        source $envdir/bin/activate
        echo -e "\x1b[38;5;2m✔ Activated virtualenv $envdir\x1b[0m"
        export PYTHONPATH=$(pwd)
    fi

    python --version
}