[Python-Dev] PEP 550 v4

[Yury Selivanov]

On Mon, Aug 28, 2017 at 6:19 PM, Eric Snow <ericsnowcurrently at gmail.com> wrote:
> On Sat, Aug 26, 2017 at 10:31 AM, Yury Selivanov
> <yselivanov.ml at gmail.com> wrote:
>> On Sat, Aug 26, 2017 at 9:33 AM, Sven R. Kunze <srkunze at mail.de> wrote:
>> [..]
>>> Why not the same interface as thread-local storage? This has been the
>>> question which bothered me from the beginning of PEP550. I don't understand
>>> what inventing a new way of access buys us here.
>>
>> This was covered at length in these threads:
>>
>> https://mail.python.org/pipermail/python-ideas/2017-August/046888.html
>> https://mail.python.org/pipermail/python-ideas/2017-August/046889.html
>
> FWIW, it would still be nice to have a simple replacement for the
> following under PEP 550:
>
> class Context(threading.local):
>     ...
>
> Transitioning from there to PEP 550 is non-trivial.

And it should not be trivial, as the PEP 550 semantics is different
from TLS.  Using PEP 550 instead of TLS should be carefully evaluated.

Please also see this:
https://www.python.org/dev/peps/pep-0550/#replication-of-threading-local-interface

Yury