[Python-Dev] PEP for adding an sq_index slot so that any object, a or b, can be used in X[a:b] notation (original) (raw)

Brett Cannon brett at python.org
Thu Feb 9 18:42:44 CET 2006

On 2/9/06, Travis Oliphant <oliphant.travis at ieee.org> wrote:

Guido seemed accepting to this idea about 9 months ago when I spoke to him. I finally got around to writing up the PEP. I'd really like to get this into Python 2.5 if possible. -Travis

PEP: ### Title: Allowing any object to be used for slicing

Overally I am fine with the idea. Being used as an index is different than coercion into an int so adding this extra method seems reasonable.

Implementation Plan

1) Add the slots 2) Change the ISINT macro in ceval.c to accomodate objects with the index slot defined.

Maybe the macro should also be renamed? Not exactly testing if something is an int anymore if it checks for index.

3) Change the PyEvalSliceIndex function to accomodate objects with the index slot defined.

-Brett

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