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

Émanuel Barry vgr255 at live.ca
Thu Apr 7 11:05:45 EDT 2016 
> From: Ethan Furman
> Sent: Thursday, April 07, 2016 11:01 AM
> To: python-ideas at python.org
> Subject: Re: [Python-ideas] Dunder method to make object str-like
> 
> On 04/07/2016 06:46 AM, Émanuel Barry wrote:
> 
> > __index__ is meant to return the same thing as __int__, and I think the
> same
> > restrictions should apply here
> 
> Do you mean "the same thing" as in both return 'int', or "the same
> thing" is in __int__(3.4) == __index__(3.4) ?  Because that last one is
> False.

I badly phrased that, let me try again. In the cases that __index__ is
defined (and does not raise), it should return the same thing as __int__.

> 
> Hmmm -- so maybe you are saying that if the results of __str__ and
> __tostring__ are the same we're fine, just like if the results of
> __int__ and __index__ are the same we're fine?  Otherwise an error is
> raised.
> 

Pretty much; as above, if __tostring__ (in absence of a better name) is
defined and does not raise, it should return the same as __str__.

-Emanuel
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