pip_upgrade.sh

#!/usr/bin/env bash

# Defaults to pip2 unless otherwise specified
if [ "$1" = 3 ]; then
    PYTHON_VERSION=3
fi

function outdated() {
    # List out outdated python packages delimited by newline
    pip${PYTHON_VERSION} list --outdated \
        | sed \
            -e 's/(.*//g' \
            -e '/^Could/ d' \
            -e '/^Some/ d'
}

main() {
    echo "Unpacking outdated packages for Python ${PYTHON_VERSION:-2}"
    declare -a list=( $(outdated) )

    # Loop through each package and install upgrade
    for ((i=0; i<${#list[@]}; i++)); do
        printf "Installing Package: %-20s" "${list[i]}"

        # Checks for successful installation
        if [ "pip${PYTHON_VERSION} install --upgrade ${list[i]} >/dev/null" ]; then
            printf "$(tput setaf 2)%s$(tput sgr0)\n" "Success"
        else
            printf "$(tput setaf 1)%s$(tput sgr0)\n" "Fail"
        fi
    done
}

if [ "$0" = "${BASH_SOURCE}" ]; then
    main
fi