[pyar] Duda acerca de sets

[Terry Reedy]

On 1/29/2012 12:41 AM, Tordek wrote:

> Tenés que definir __hash__:
>
> def __hash__(self):
> return hash(self.id)
>
> De http://docs.python.org/library/sets.html:
>
> "[...] the requirements for set elements are the same as those for
> dictionary keys; namely, that the element defines both __eq__() and
> __hash__()."

Y sin definirlo, se usa object.__hash__(ob) == id(ob),
y id(o1) != id(o2).


-- 
Terry Jan Reedy