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[Python-Dev] Deprecating "instance method" class

Guido van Rossum guido at python.org
Fri Apr 5 11:46:00 EDT 2019 
Let's stop here. This API is doing no harm, it's not a maintenance burden,
clearly *some* folks have a use for it. Let's just keep it, okay? There are
bigger fish to fry.

On Fri, Apr 5, 2019 at 5:36 AM Jeroen Demeyer <J.Demeyer at ugent.be> wrote:

> On 2019-04-05 15:13, Serhiy Storchaka wrote:
> > It is easy to implement a function in C.
>
> Why does it need to be a PyCFunction? You could put an actual method
> descriptor in the class. In other words, use PyDescr_NewMethod() instead
> of PyCFunction_New() + PyInstanceMethod_New(). It's probably going to be
> faster too since the instancemethod adds an unoptimized extra level of
> indirection.
>
> > Yes, this is what I want to do. I did not do this only because
> > implementing method-like functions which which do not belong to concrete
> > class implemented in C is not convention.
>
> Sure, you could implement separate methods like __gt__ in C, but that's
> still less efficient than just implementing a specific tp_richcompare
> for total_ordering and then having the usual wrapper descriptors for
> __gt__.
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-- 
--Guido van Rossum (python.org/~guido)
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