def addLadder(settings):
    """define a new Ladder setting and save to disk file"""
    ladder = Ladder(settings)
    ladder.save()
    getKnownLadders()[ladder.name] = ladder
    return ladder
def addLadder ( settings ) : ladder = Ladder ( settings ) ladder . save ( ) getKnownLadders ( ) [ ladder . name ] = ladder return ladder
define a new Ladder setting and save to disk file