[Python-Dev] tp_finalize vs tp_del sematics

[Valentine Sinitsyn]

Hi Armin,

On 04.09.2015 02:29, Armin Rigo wrote:
> Hi Valentine,
>
> On Thu, Sep 3, 2015 at 9:15 PM, Valentine Sinitsyn
> <valentine.sinitsyn at gmail.com> wrote:
>>> That does not make it ok to have del called several time, does it?
>>
>> That's a tricky question.
>
> If the Python documentation now says something like ``the __del__
> method is never called more than once on the same instance'' without
> acknowledging this corner case, then it could be regarded as
> documentation bug.  I didn't check, though.  But feel free to open an
> issue and mention everything I said above, if you want to.
I've checked the places I remembered, but didn't find any guarantees for 
__del__ to be called exactly once in general. Looks like it was only 
important to ensure safe finalization.

Looks a bit inconsistent though so it's probably appropriate to file the 
report.

Valentine