[Python-Dev] getting rid of default object.__hash__ (SF 660098)

[Guido van Rossum]

> Would this mean that instances of the following class:
> 
> class Dummy(object):
>      pass
> 
> would no longer be usable as dictionary keys?  I guess the parts I'm
> not clear on are 1) whether dictionaries call the equivalent of
> 'hash(key)' or 'key.__hash__()', and 2) whether 'hash(Dummy())' will
> do something meaningful.

That class would still be usable.  hash(Dummy()) sees that there's no
__eq__ or __cmp__ override and then uses the default hash.

--Guido van Rossum (home page: http://www.python.org/~guido/)