That does add a lot of redundant noise on each line, though. I would write this particular case as normal tuples which I would then turn into Keys in a separate

That does add a lot of redundant noise on each line, though. I would write this particular case as normal tuples which I would then turn into Keys in a separate step: keys = [Key(*tuple) for tuple in keys] Another possibility is to keep the Key constructor on each line, but to get rid of the keyword arguments, which are not mandatory: >>> Key('a', 'b', 'c', 'd') Key(modifier='a', key='b', function='c', argument='d')