On Wed, Dec 5, 2018 at 2:57 PM Simon King <simon.k...@uni-jena.de> wrote: > > > > Am Mittwoch, 5. Dezember 2018 13:38:03 UTC+1 schrieb Volker Braun: >> >> On Wednesday, December 5, 2018 at 6:52:55 AM UTC-5, Simon King wrote: >>> >>> - If there is a reference cycle involving one instance with a __del__ >>> method, then Python would not apply garbage collection to that cycle. >> >> >> Python will garbage collect the cycle by not calling __del__ on some of the >> cycle members. > > > Has that changed? I recall that in my early days in Sage (when I created the > first version of my group cohomology package) I had to remove some __del__ > method (or change it into a __dealloc__ method), since otherwise some > reference cycles haven't been collected at all.
There have been some changes in this area, but mostly focus on Python 3: https://www.python.org/dev/peps/pep-0442/ I think it's still true at least on Python 2 that if an object with a Python-level __del__ method is involved in a reference cycle, then the cycle still has to be broken manually. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
