Finally, we'll want a way to test whether a file we've opened is closed. Sometimes we'll have a lot of file objects open, and if we're not careful, they won't all be closed. How can we test this? f = open("bg.txt") f.closed # False f.close() f.c…
In machine learning, is more data always better than better algorithms? No. There are times when more data helps, there are times when it doesn't. Probably one of the most famous quotes defending the power of data is that of Google's Research Directo…
http://blog.csdn.net/shandongdaya/article/details/7282547 一 有限状态机的实现方式 有限状态机(Finite State Machine或者Finite State Automata)是软件领域中一种重要的工具,很多东西的模型实际上就是有限状态机.FSM的实现方式:1) switch/case或者if/else这无意是最直观的方式,使用一堆条件判断,会编程的人都可以做到,对简单小巧的状态机来说最合适,但是毫无疑问,这样的方式比较原始,对庞…
你可以使用如下流程控制符: if and else for loops while and do-while loops break and continue switch and case assert 同时,你可以用try-catch 和throw去跳出流程控制逻辑,并在异常代码块中进行处理. If and else 下面是if和else配合使用的示例: if (isRaining()) { you.bringRainCoat(); } else if (isSnowing()) { you…
