【转】老卫聊架构：做技术，应该先有深度再谈广度
http://mp.weixin.qq.com/s?__biz=MzA5Nzc4OTA1Mw==&mid=408703236&idx=1&sn=3f78abcca906d5edee06ff85b2d22416&scene=2&srcid=0205RjbpOeqNzy0PeOqQZ4Rc&from=timeline&isappinstalled=0#wechat_redirect
利用python yielding创建协程将异步编程同步化
http://www.jackyshen.com/2015/05/21/async-operations-in-form-of-sync-programming-with-python-yielding/