pip-upgrade-all-user-packages.sh

#!/bin/bash -e

pkglst=$(pip list --user --outdated --format=freeze | cut -d= -f1)

if [ "$pkglst" = "" ]; then
    echo "All pip packages is up to date. Nothing to do."
    exit
fi

echo -ne "OUTDATED PIP PACKAGES:\n  "
echo $pkglst | sed 's/ /\n  /g'
echo -n "Upgrade these packages? [y/N] "
read -n1 answer
[ "$answer" = "" ] && exit  # \n
echo ""

if [ $answer = Y -o $answer = y ]; then
    echo $pkglst | xargs pip install --upgrade --user
fi