further attempts to fix python3 class reading
further attempts to fix python3 class reading

pyspeckit/pyspeckit,low-sky/pyspeckit,e-koch/pyspeckit,low-sky/pyspeckit,jpinedaf/pyspeckit,keflavich/pyspeckit,vlas-sokolov/pyspeckit,jpinedaf/pyspeckit,vlas-sokolov/pyspeckit,e-koch/pyspeckit,pyspeckit/pyspeckit,allisony/pyspeckit,allisony/pyspeckit,keflavich/pyspeckit