<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def clone(self, **keywd):
 """constructs new argument_t instance return argument_t( name=keywd.get('name', self.name), decl_type=keywd.get('decl_type', self.decl_type), default_value=keywd.get('default_value', self.default_value), attributes=keywd.get('attributes', self.attributes )) """

        return argument_t(
            name=keywd.get('name', self.name),
            decl_type=keywd.get('decl_type', self.decl_type),
            default_value=keywd.get('default_value', self.default_value),
            attributes=keywd.get('attributes', self.attributes))