[Python-ideas] PEP 550 v2

[Guido van Rossum]

OK, I get it now. I really liked the analysis of existing uses in Django.
So no worries about this.

On Wed, Aug 23, 2017 at 5:36 PM, Yury Selivanov <yselivanov.ml at gmail.com>
wrote:

> There's another "major" problem with theading.local()-like API for PEP
> 550: C API.
>
> threading.local() in C right now is PyThreadState_GetDict(), which
> returns a dictionary for the current thread, that can be
> queried/modified with PyDict_* functions.  For PEP 550 this would not
> work.
>
> The advantage of the current ContextKey solution is that the Python
> API and C API are essentially the same: [1]
>
> Another advantage, is that ContextKey implements a better caching,
> because it can have only one value cached in it, see [2] for details.
>
> [1] https://www.python.org/dev/peps/pep-0550/#new-apis
> [2] https://www.python.org/dev/peps/pep-0550/#contextkey-get-cache
>
> Yury
>



-- 
--Guido van Rossum (python.org/~guido)
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