Re: [Python-ideas] bytes indexing behavior

On Tue, Jun 7, 2016 at 1:06 AM, Serhiy Storchaka wrote:

On 07.06.16 07:48, Guido van Rossum wrote:

...

On Monday, June 6, 2016, Serhiy Storchaka mailto:storchaka@gmail.com> wrote:

On 06.06.16 23:28, Guido van Rossum wrote:

I think the approach using a new method for the old behavior is workable. Maybe we should add another (temporary) new method for the new behavior.

The magic object approach is too magical.

We should do the same for bytearray and memoryview.

I often use bytearray and memoryview as arrays of ints.

Really short ints. :-). But you should really use the array module instead.

Yes, ints of known width (even 1-bit ints in sre_compile.py). Using the array module requires additional copying. Aren't bytearray and memoryview here for avoiding unnecessary copying?

Actually, array.array implements the buffer protocol, and memoryview can operate on any object that implements the buffer protocol. Thus, you should be able to create a memoryview of an array.array instance and operate on that (and in fact, you can, as I just tested it in an interactive session).