Am Sonntag, 1. Dezember 2019, 21:09:50 CET schrieb Michał Górny:
> # Michał Górny <mgorny@gentoo.org> (2019-12-01)
> # Unmaintained.  Last release in 2012.  Buggy ebuild.
> # Removal in 30 days.  Bug #658302.
> app-text/pdfshuffler

This is also Python 2 only and GTK 2 (with very experimental GTK 3 support).
However, there seems to be a modern (active) fork with Python 3 and
GTK 3:
https://github.com/jeromerobert/pdfarranger

Gerion