[Python-ideas] Dunder method to make object str-like

Nikolaus Rath Nikolaus at rath.org
Tue Apr 12 13:17:52 EDT 2016

On Apr 11 2016, Ethan Furman <ethan-gcWI5d7PMXnvaiG9KC9N7Q at public.gmane.org> wrote:
>> As far as I can see, implementing a protocol instead of adding a few
>> isinstance checks is more likely to make the life of a CPython developer
>> harder than easier.
> I disagree.  And the protocol idea was not mine, so apparently other
> core-devs also disagree (or think it's worth it, regardless).

I haven't found any email explaining why a protocol would make things
easier than the isinstance() approach (and I read most of the threads
both here and on -dev), so I was assuming that the core-devs in question
don't disagree but haven't considered the second approach.

But this will be my last mail advocating it. If there's still no
interest, then there probably is a reason for it :-).


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