function pip_upgrade --description "Upgrade python packages"
    set --local py_pkgs_outdated (python3 -m pip list --outdated | awk 'NR > 2 {print $1}')

    if test (count $py_pkgs_outdated) -eq 0
        echo "All packages up-to-date."
    else
        echo "Outdated packages: $py_pkgs_outdated"
        if confirm
            for py_pkg in $py_pkgs_outdated
                python3 -m pip install -U $py_pkg
            end
        end
    end
end