On Sep 29, 2017 18:21, "Guido van Rossum" <guido@python.org> wrote:

PS. PEP 550 is still unaccepted, awaiting a new revision from Yury and Elvis.

This is getting really off-topic, but I do have updates to add to PEP 555 if there is interest in that. IMO, 555 is better and most likely faster than 550, but on the other hand, the issues with PEP 550 are most likely not going to be a problem for me personally.

-- Koos