官网上没3.5，但是pip可以直接安装！
用的时候出错！
出现ImportError:cannot import name ‘_win32stdio’

Twisted Core 15.5.0 (2015-11-28)

This is the last Twisted release where Python 2.6 is supported, on any
platform. Python 3.5 (on POSIX) support has been added.

https://github.com/twisted/twisted/blob/trunk/NEWS

http://outofmemory.cn/code-snippet/4624/python-twisted-example