Bug#602393: ITP: python-greenlet -- a spin-off of Stackless, a version of CPython that supports micro-threads called tasklets

[XuZhiXiang <shell909090@gmail.com>]

Package: wnpp
Severity: wishlist
Owner: XuZhiXiang <shell909090@gmail.com>

* Package name    : python-greenlet
  Version         : 0.3.1
  Upstream Author : Kyle Ambroff <kyle@ambroff.com>
* URL             : http://bitbucket.org/ambroff/greenlet
* License         : MIT
  Programming Lang: Python, C
  Description     : a spin-off of Stackless, a version of CPython that supports micro-threads called tasklets

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 of micro-
thread with no implicit scheduling; coroutines, in other words. This is
useful when you want to control exactly when your code runs. You can build
custom scheduled micro-threads on top of greenlet; however, it seems that
greenlets are useful on their own as a way to make advanced control flow
structures. For example, we can recreate generators; the difference with
Python's own generators is that our generators can call nested functions and
the nested functions can yield values too. Additionally, you don't need a
"yield" keyword. See the example in tests/test_generator.py.

Greenlets are provided as a C extension module for the regular unmodified
interpreter.

Greenlets are lightweight coroutines in-process concurrent programming. This
package is the py.magic.greenlet module from the py lib.