MarsSeed [1] filed a deletion request for python2-oger [2]: Discontinued after 2012, does not work, sources gone from the university site.[a] That GitHub user (no relation to original project or its developers) recommends a current tool for reservoir computing. [b] Safe to delete, nothing depends on it. [a] https://github.com/neuronalX/Oger [b] https://github.com/reservoirpy/reservoirpy [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python2-oger/