[Python-Dev] PEP 554 v3 (new interpreters module)

Eric Snow ericsnowcurrently at gmail.com
Tue Oct 3 10:36:55 EDT 2017

On Tue, Oct 3, 2017 at 5:00 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:
> On Mon, 2 Oct 2017 22:15:01 -0400
> Eric Snow <ericsnowcurrently at gmail.com> wrote:
>> I'm still not convinced that sharing synchronization primitives is
>> important enough to be worth including it in the PEP.  It can be added
>> later, or via an extension module in the meantime.  To that end, I'll
>> add a mechanism to the PEP for third-party types to indicate that they
>> can be passed through channels.  Something like
>> "obj.__channel_support__ = True".
> How would that work?  If it's simply a matter of flipping a bit, why
> don't we do it for all objects?

The type would also have to be safe to share between interpreters. :)
Eventually I'd like to make that work for all immutable objects (and
immutable containers thereof), but until then each type must be
adapted individually.  The PEP starts off with just Bytes.


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