On Mar 26, 11:10 am, Marco Mariani <ma... at sferacarta.com> wrote: > Marco Mariani wrote: > >> while True: > >> a = filea.readline() > >> b = fileb.readline() > >> if not (a or b): > >> break > > BTW, watch out for this break. It might not be what you want :-/ HA! Just found it :P Thanks, t.