GitHub - python-greenlet/greenlet: Lightweight in-process concurrent programming

Greenlets are lightweight coroutines for in-process concurrent programming. The "greenlet" package is a spin-off of Stackless, a version of CPython that supports micro-threads called "tasklets". Tasklets run pseudo-concurrently (typically in a single or a few OS-level threads) and are synchronized with data exchanges on "channels". A "greenlet", on the other hand, is a still more primitive notion