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Stackless Python
简介
Stackless Python 是 Python 编程语言的一个增强版本。它能让程序员在获得基于线程编程的好处的同时，还不用考虑传统线程带来的性能和灵活性的问题。由 Stackless 添加到 Python 中的微线程是一个便宜且轻量的便利工具，如果用得恰当的话，它能提供以下好处：
- 改良程序结构
- 增强代码可读性
- 提高程序员生产力
Stackless Python is an enhanced version of the Python programming language. It allows programmers to reap the benefits of thread-based programming without the performance and complexity problems associated with conventional threads. The microthreads that Stackless adds to Python are a cheap and lightweight convenience which can if used properly, give the following benefits:
- Improved program structure.
- More readable code.
- Increased programmer productivity.
特性
对于所有通过使用 Stackless 所能获得的便利来说，通过 stackless 模块暴露出来的功能其实只有其中很少的一部分。通过阅读以下页面提供的信息，你将会对这些概念熟悉起来的：
[http://www.stackless.com/wiki/Tasklets Microthreads]. Tasklets 对函数进行包装，然后便可以作为微线程而启动。
[http://www.stackless.com/wiki/Channels Channels]. Channels 可以用来在 tasklets 之间进行双向的通讯。
[http://www.stackless.com/wiki/Scheduling Scheduling]. 内置了一个 round robin 调度器。它可以以合作或抢占式两种方式对 tasklets 进行调度。
[http://www.stackless.com/wiki/Pickling Serialisation]. Tasklets 可以通过 pickling 序列化到磁盘上，稍后再继续执行。
For all the convenience gained through using Stackless, there is really only a minimal amount of functionality exposed through the stackless module. You can get more familiar with these aspects by reading the information provided in the following pages:
[http://www.stackless.com/wiki/Tasklets Microthreads]. Tasklets wrap functions allowing them to be launched as microthreads.
[http://www.stackless.com/wiki/Channels Channels]. Channels can be used for bidirectional communication between tasklets.
[http://www.stackless.com/wiki/Scheduling Scheduling]. A round robin scheduler is built in. It can be used to schedule tasklets either cooperatively or preemptively.
[http://www.stackless.com/wiki/Pickling Serialisation]. Tasklets can be serialised to disk through pickling for later resumption of execution.
相关链接
[http://www.stackless.com/ 官方首页]
[http://members.verizon.net/olsongt/stackless/ Introduction to Concurrent Programming with Stackless Python]
[http://www.python.org/workshops/2000-01/proceedings/papers/tismers/spcpaper.htm Continuations and Stackless Python Or "How to change a Paradigm of an existing Program"]
[http://www.python.org/dev/peps/pep-0219/ pep-0219 Stackless Python]
[http://codespeak.net/svn/pypy/dist/pypy/doc/discussion/howtoimplementpickling.txt Designing thread pickling or "the Essence of Stackless Python"]
[http://harkal.sylphis3d.com/2005/08/10/multithreaded-game-scripting-with-stackless-python/ Multithreaded Game Scripting with Stackless Python]
[http://www.imperialviolet.org/stackless/ Stackless]
[http://willware.net:8080/uthread.html Python Microthreads]
示例