[Python-Dev] Extended Buffer Protocol - simple use examples (original) (raw)

Travis Oliphant oliphant.travis at ieee.org
Mon Apr 9 22:26:16 CEST 2007

Paul Moore wrote:

Hi, I'll admit right off that I haven't followed all of the extended buffer protocol discussions - I have no real need for anything much beyond the existing "here's a blob of memory" level of functionality.

I have skimmed (briefly, I'll admit!) the pre-PEP, but I've found it extremely difficult to find a simple example of the basic (in my view) use case of an undifferentiated block of bytes.

This is a great suggestion and it was on my to-do list. I've included some examples of this use-case in the new PEP.

1. (Producer) I have a block of memory in my C extension and I want to expose it as a simple contiguous block of bytes to Python.

This is now Ex. 2 in the PEP.

2. (Consumer) I want to get at a block of memory exposed as a buffer. I am only interested in, and only support, viewing a buffer as a block of contiguous bytes. I expect most if not all extensions to be able to provide such a view.

This is now Ex. 3

Thanks for the suggestions.

-Travis

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