In GitLab by @jaraco on Feb 20, 2019, 15:00

bpo-34632 describes the addition of the importlib_metadata functionality to CPython.

In python 9327, an early port was attempted, but the underlying implementation has since changed dramatically, so another port is probably the best approach.

Here's what I suggest for a port: Either CPython or this package should be the canonical, authoritative implementation. Currently, this implementation is that one, but at some point in the future, perhaps I suspect the CPython one may be. Regardless, one repo or another should contain the changes the comprise the port, the commits that transform the code from the canonical code base to the other (such that one could merge a contribution made in the canonical codebase into the other).