Bash snippet for easy access to venv

venv.bash

venv() {
    # use global venvs from $HOME if arg is provided
    if [[ -n $1 ]]; then
        . ~/venv/$1/bin/activate
        return
    fi

    # look for a venv in current directory
    for dir in "venv" ".venv" "env" ".env"; do
        if [[ -d $dir ]]; then
            . $dir/bin/activate
            return
        fi
    done

    # exit with error
    echo ERROR: Unable to find local environment >&2
    return 127
}

Project specific virtual environments

$ which python
/usr/bin/python
$ ls
.venv/ src/ setup.py server.py ...
$ venv
$ (.venv) which python
/home/you/project/.venv/bin/python3

System wide virtual environments

$ which python
/usr/bin/python
$ venv scipy-env
$ (scipy-env) which python
/home/you/venv/scipy-env/bin/python3