rfc1902.py 文件源码

def withNamedValues(cls, **values):
        """Creates a subclass with discreet named values constraint.
        """
        class X(cls):
            namedValues = cls.namedValues + namedval.NamedValues(*values.items())
            subtypeSpec = cls.subtypeSpec + constraint.SingleValueConstraint(*values.values())
        X.__name__ = cls.__name__
        return X