After extended discussion over the last several months on import-sig,
the resulting proposal for multi-phase (PEP 451) extension module
initialization has finalized. The resulting PEP provides a clean,
straight-forward, and backward-compatible way to import extension
modules using ModuleSpecs.
With that in mind and given the improvement it provides, PEP 489 is
now accepted. I want to thank Petr, Nick, and Stefan for the time,
thought, and effort they put into the proposal (and implementation).
It was a disappointment to me when, at the time, we couldn't find a
good way to apply PEP 451 to builtins and extension modules. So
thanks for easing my anxiety!