extend Python namedtuple with many @properties?

Question

How can namedtuples be extended or subclassed with many additional @properties ?
For a few, one can just write the text below; but there are many, so I\'m looking for a gene

Answer 1

How about this?

class Top( namedtuple( "Top_", "topid amount personid" )): 
    """ @property  
        .person -> persontable[personid] 
        .pname -> person.pname ... 
    """ 
    __slots__ = () 
    @property 
    def person(self): 
        return persontable[self.personid] 

    def __getattr__(self,attr):
        if attr in Person._fields:
            return getattr(self.person, attr)
        raise AttributeError("no such attribute '%s'" % attr)