[Python-Dev] Consolidate stateful runtime globals

Antoine Pitrou solipsis at pitrou.net
Wed Sep 6 13:08:01 EDT 2017

On Wed, 06 Sep 2017 09:42:29 -0700
Benjamin Peterson <benjamin at python.org> wrote:
> On Wed, Sep 6, 2017, at 03:14, Antoine Pitrou wrote:
> > 
> > Hello,
> > 
> > I'm a bit concerned about
> > https://github.com/python/cpython/commit/76d5abc8684bac4f2fc7cccfe2cd940923357351
> > 
> > My main gripe is that makes writing C code more tedious.  Simple C
> > global variables such as "_once_registry" are now spelled
> > "_PyRuntime.warnings.once_registry".  The most egregious example seems
> > to be "_PyRuntime.ceval.gil.locked" (used to be simply "gil_locked").
> > 
> > Granted, C is more verbose than Python, but it doesn't have to become
> > that verbose.  I don't know about you, but when code becomes annoying
> > to type, I tend to try and take shortcuts.  
> How often are you actually typing the names of runtime globals, though?

Not very often, but if I want to experiment with some low-level
implementation details, it is nice to avoid the hassle.

There's also a readability argument: with very long names, expressions
can become less easy to parse.

> If you are using a globals, perhaps the typing time will allow you to
> fully consider the gravity of the situation.

Right, I needed to be reminded of how perilous the use of C globals is.
Perhaps I should contact the PSRT the next time I contemplate using a C



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