def __new__(cls, n): assert n >= 1 return Standard_Cartan.__new__(cls, "A", n)
def __new__(cls, n): if n < 1: raise ValueError("n can not be less than 1") return Standard_Cartan.__new__(cls, "A", n)
def __new__(cls, n): assert n >= 1 return Standard_Cartan.__new__(cls, "A", n)