A dirty hack which uses closure maps the accessing on an attribute to the __*item__ methods.

property-with-closure.py

setattr(DictLike, attrname,
    # it is a colsure
    (lambda x:
        property(
            lambda self: self.__getitem__(x),
            lambda self, v: self.__setitem__(x, v),
            lambda self: self.__delitem__(x)
        )
    )(attrname)
)