廖雪峰教程--- http://www.liaoxuefeng.com/wiki/001374738125095c955c1e6d8bb493182103fac9270762a000/001386832360548a6491f20c62d427287739fcfa5d5be1f000
https://www.ibm.com/developerworks/cn/aix/library/au-threadingpython/
http://www.cnblogs.com/tqsummer/archive/2011/01/25/1944771.html
http://www.cnblogs.com/huxi/archive/2010/06/26/1765808.html
题外：
关于twisted---http://www.zhihu.com/question/23854296
other:
http://www.zhihu.com/question/26667807