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Thu Aug 24 11:00:04 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-August/148923.html

It shouldn't be called a namespace unless the dominant access is via
attributes.

On Thu, Aug 24, 2017 at 4:37 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:

> On 24 August 2017 at 08:47, Ethan Furman <ethan at stoneleaf.us> wrote:
> >
> > ContextVars is actually a different name for LogicalContext.  So it would
> > be:
> >
> >   ExecutionContext = [ContextVars()[, ContextVars()[ ...]]]
> >
> > and you get the (thread.local similar) ContextVars by
> >
> >   context_vars = sys.get_context_vars()   # or whatever
> >   context_vars.verbose = ...
>
> Migrating a (variant of a) naming subthread from python-ideas over to
> here, does the following sound plausible to anyone else?:
>
>     ContextLocal - read/write access API (via get()/set() methods)
>     ContextLocalNamespace - active mapping that CL.get()/set() manipulates
>     ExecutionContext - current stack of context local namespaces
>
> Building a threading.local() style helper API would then look something
> like:
>
>     class ContextLocals:
>         def __init__(self, key_prefix):
>             self._key_prefix = key_prefix
>
>         def __getattr__(self, attr):
>             debugging_name = "{}.{}".format(self._key_prefix, attr)
>             self.__dict__[attr] = new_local =
> sys.new_context_local(debugging_name)
>             return new_local
>
>         def __setattr__(self, attr, value):
>             getattr(self, attr).set(value)
>
>         def __delattr__(self, attr):
>             getattr(self, attr).set(None)
>
>     my_state = ContextLocals(__name__)
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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-- 
--Guido van Rossum (python.org/~guido)
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[Python-Dev] PEP 550 v3 naming