[Python-Dev] Bad interaction of index and sequence repeat (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Tue Aug 1 13:00:33 CEST 2006

Travis Oliphant wrote:

Probably the most interesting thing now would be for Travis to review it, and see whether it makes things easier to handle for the Numeric scalar types (given the amount of code the patch deleted from the builtin and standard library data types, hopefully the benefits to Numeric will be comparable).

I noticed most of the checks for PyInt where removed in the patch. If I remember correctly, I left these in for "optimization." Other than that, I think the patch is great.

You're right - there was a fast path based on PyInt_Check in _PyEval_SliceIndex that got lost, which I'll add back in. I'll also add fast paths for PyInt_Check to the functions in abstract.c, too.

The other PyInt_Check's (in slot_nb_index and instance_index) were there to check that index returned the right thing. The check was still there in slot_nb_index, but I'd incorrectly removed it from instance_index. I'll add that one back in, too.

Once that's done, I'll update the tracker item and reassign to Tim for a review.

Cheers, Nick.

As far as helping with NumPy, I think it will help to be able to remove special-checks for all the different integer-types. But, this has not yet been done in the NumPy code.

-Travis

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia

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