[Python-Dev] Cycle collection enhancement idea

[eyal.lotem+pyutils@gmail.com]

On Jun 29, 7:52 am, "Guido van Rossum" <gu... at python.org> wrote:
> On Sat, Jun 28, 2008 at 5:39 PM, Greg Ewing <greg.ew... at canterbury.ac.nz> wrote:
> > Nick Coghlan wrote:
>
> >> It's a fact of Python development: __del__ methods cannot safely reference
> >> module globals, because those globals may be gone by the time that method is
> >> invoked.
>
> > Speaking of this, has there been any more thought given
> > to the idea of dropping the module clearing and just
> > relying on cyclic GC?
>
> No, but it is an intriguing thought nevertheless. The module clearing
> causes nothing but trouble...
This is exactly what my post tried to address.
I assumed it was clear that module clearing is the wrong solution, and
that it was also clear that due to the cycles I mentioned
(global.__class__.__dict__['any_method'].func_globals['global'] is
global), all globals that have a __del__ will not be collectible.
Therefore, I proposed a solution to cycles with a __del__ in them.
Only with this solution it is possible to replace module clearing with
normal garbage collection.

Eyal

>
> --
> --Guido van Rossum (home page:http://www.python.org/~guido/)
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