python3-greenlet - 2.0.2-1 main

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".
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greenlet is the standalone package derived from the py lib, and is used by
several non-blocking IO packages as a more flexible alternative to Python's
built in coroutines.