(original) (raw)
Mon, Oct 2, 2017 at 2:52 PM, Koos Zevenhoven <k7hoven@gmail.com> wrote
I don't mind this (or Nathaniel ;-) being academic. The backwards incompatibility issue I've just described applies to any extension via composition, if the underlying type/protocol grows new members (like the CM protocol would have gained \_\_suspend\_\_ and \_\_resume\_\_ in PEP521).
Since you seem to have a good grasp on this issue, does PEP 550 suffer from the same problem? (Or PEP 555, for that matter? :-)