On 3/6/06, Raymond Hettinger <[EMAIL PROTECTED]> wrote: > [Neil Schemenauer] > >I occasionally need dictionaries or sets that use object identity > > rather than __hash__ to store items. Would it be appropriate to add > > these to the collections module? > > Why not decorate the objects with a class adding a method: > def __hash__(self): > return id(self) > > That would seem to be more Pythonic than creating custom variants of other > containers.
I hate to second-guess the OP, but you'd have to override __eq__ too, and probably __ne__ and __cmp__ just to be sure. And probably that wouldn't do -- since the default __hash__ and __eq__ have the desired behavior, the OP is apparently talking about objects that override these operations to do something meaningful; overriding them back presumably breaks other functionality. I wonder if this use case and the frequently requested case-insensitive dict don't have some kind of generalization in common -- perhaps a dict that takes a key function a la list.sort()? -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
