At 07:12 PM 11/6/2005 -0500, Phillip J. Eby wrote: >At 01:29 PM 11/6/2005 -0800, Guido van Rossum wrote: > >On 11/6/05, Phillip J. Eby <[EMAIL PROTECTED]> wrote: > > > At 12:58 PM 11/6/2005 -0800, Guido van Rossum wrote: > > > >The main way this breaks down is when comparing objects of different > > > >types. While most comparisons typically are defined in terms of > > > >comparisons on simpler or contained objects, two objects of different > > > >types that happen to have the same "key" shouldn't necessarily be > > > >considered equal. > > > > > > When I use this pattern, I often just include the object's type in the > > > key. (I call it the 'hashcmp' value, but otherwise it's the same > pattern.) > > > >But how do you make that work with subclassing? (I'm guessing your > >answer is that you don't. :-) > >By either changing the subclass __init__ to initialize it with a different >hashcmp value, or by redefining the method that computes it.
Scratch that. I realized 2 seconds after hitting "Send" that you meant the case where you want to compare instances with a common parent type. And the answer is, I can't recall having needed to. (Which is probably why it took me so long to realize what you meant.) _______________________________________________ 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
