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Thu Nov 8 18:59:35 CET 2012 · https://mail.python.org/pipermail/python-dev/2012-November/122614.html

In Python, you can write

if C.__eq__ == object.__eq__:
    print('class C does not override __eq__')

Does that help?

On Thu, Nov 8, 2012 at 9:55 AM, Tres Seaver <tseaver at palladion.com> wrote:
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> On 11/08/2012 12:38 PM, Guido van Rossum wrote:
>> Well, the default behavior has changed to raise an exception when
>> using <, <=, >, >=; i.e., inequalities do not have a default
>> implementation at all. Perhaps that is enough for your purpose? ==
>> and != still compare by pointer, but you're primarily interested in
>> ordering her, right?
>
> The b-search algorithm needs ordering on keys, but also meaningful
> (non-identity) equality.
>
>
> Tres.
> - --
> ===================================================================
> Tres Seaver          +1 540-429-0999          tseaver at palladion.com
> Palladion Software   "Excellence by Design"    http://palladion.com
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-- 
--Guido van Rossum (python.org/~guido)

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[Python-Dev] Detecting tp_compare / tp_richcompare from Python