bpo-30439: Add a basic high-level interpreters module. by ericsnowcurrently · Pull Request #1803 · python/cpython

(based on #1802)

Note that, unlike the preceding 2 patches, this one adds a "public" module to the stdlib. As such it requires more careful attention to the API/abstractions, as well as stronger consensus from python-dev and the other major Python implementations. As such, this PR is equally a proof-of-concept and a proposal.