On 4/28/2011 12:55 PM, Guido van Rossum wrote:
*If* my proposal gets accepted, there will be a blanket rule that no matter how exotic an type's __eq__ is defined, self.__eq__(self) (i.e., __eq__ called with the same *object* argument) must return True if the type's __eq__ is to be considered well-behaved;
This, to me, is a statement of the obvious ;-), but it should be stated in the docs.
Do you also propose to make NaNs at least this well-behaved or leave them ill-behaved?
> and Python
containers may assume (for the purpose of optimizing their own comparison operations) that their elements have a well-behaved __eq__.
This almost states the status quo of the implementation, and the doc needs to be updated correspondingly. I do not think we should let object ill-behavior infect containers, so that they also become ill-behaved (not equal to themselves).
-- Terry Jan Reedy _______________________________________________ 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
