[Python-Dev] Consolidate stateful runtime globals

[Glenn Linderman]

On 9/6/2017 1:18 PM, Gregory P. Smith wrote:
> I'm not concerned about moving things into a state structure rather 
> than wildly scattered globals declared all over the place.  It is good 
> code hygiene. It ultimately moves us closer (much more work to be 
> done) to being able to actually have multiple independent interpreters 
> within the same process (including potentially even of different 
> Python versions).
>
> For commonly typed things that get annoying,
>
> #define _Py_grail   _PyRuntme.ceval.holy.grail
>
> within the .c source file that does a lot of grail flinging seems fine 
> to me.
>
> -gps

You just need a PEP 550 (or 555) to use instead of C globals.

But why would you ever want multiple Python versions in one process? 
Sounds like a debug headache in the making. Name collisions would abound 
for libraries and functions even if globals were cured!
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