CPython's cyclic garbage collector (was [Python-ideas] Automatic context managers)

[Dave Angel]

On 04/26/2013 06:43 PM, Ian Kelly wrote:


    <SNIP>
>
> Whenever the GC finds a cycle that is unreferenced but uncollectable,
> it stores those objects in the list gc.garbage.  At that point, if the
> user wishes to clean up those cycles, it is up to them to delve into
> gc.garbage, untangle the objects contained within, break the cycles,
> and remove them from the list so that they can be freed by the ref
> counter.  This user-supplied step is what Chris is referring to as
> "some other" periodic check.  If the user does not do this, then those
> objects simply remain in the gc.garbage list until the program
> terminates.
>

I didn't know there was a callback that a user could hook into.  That's 
very interesting.

-- 
DaveA