function pip_upgrade --description "Upgrade python packages"
    set --local py_pkgs_outdated (pip3 list --outdated | awk 'NR > 2 {print $1}')

    if test (count $py_pkgs_outdated) = 0
        echo "All packages up-to-date."
    else
        for py_pkg in $py_pkgs_outdated
            pip3 install $py_pkg -U
        end
    end
end