[Python-Dev] PEP 447: add type.__locallookup__

[Mark Shannon]

I'll look into it this evening.

On 09/09/13 17:03, Guido van Rossum wrote:
> OK, how much time do you need?
>
> --Guido van Rossum (sent from Android phone)
>
> On Sep 9, 2013 8:44 AM, "Mark Shannon" <mark at hotpy.org <mailto:mark at hotpy.org>> wrote:
>
>     I would like time to investigate this further, but at the moment I think it will either make attribute lookup poorly defined or slow.
>
>     Of the top of my head, the problem as a I see it is basically this:
>     Currently, type.__getattribute__() is a fixed point in the lookup of attributes.
>     The proposal means that a fixed point is not reached until the cls parameter of type.__getattribute__() is either object or type,
>     otherwise type.__getattribute__() and type.__locallookup__ must bounce back and forth.
>
>     This will slow down *every* attribute lookup for what is a fairly obscure use case.
>
>     Cheers,
>     Mark.
>
>     On 09/09/13 16:27, Guido van Rossum wrote:
>
>         Let's just accept this PEP. It looks like a nice addition to the metaclass machinery and I don't think we'll get much more useful feedback by waiting.
>
>
>         On Mon, Sep 9, 2013 at 7:30 AM, Ethan Furman <ethan at stoneleaf.us <mailto:ethan at stoneleaf.us> <mailto:ethan at stoneleaf.us <mailto:ethan at stoneleaf.us>>> wrote:
>
>              On 07/30/2013 11:17 PM, Ronald Oussoren wrote:
>
>
>                  And something I forgot to ask: is anyone willing to be the BDFL-Delegate for
>                  PEP 447?
>
>
>              *Bump*.
>
>              It would be nice if this could make into 3.4.
>
>              --
>              ~Ethan~
>
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>         --
>         --Guido van Rossum (python.org/~guido <http://python.org/~guido> <http://python.org/~guido>)
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