In this chapter I present classes to represent playing cards, decks of cards, and poker hands.If you don't play poker, you can read about it at http://en.wikipedia.org/wiki/Poker, but you don’t have to; I’ll tell you what you need to know for the exe…

<Web Scraping with Python> Chapter 1 & 2: Your First Web Scraper & Advanced HTML Parsing BeautifulSoup Key:     P5: urlib or urlib2?  If you’ve used the urllib2 library in Python 2.x, you might have noticed that things have changed somewhat…

十八. Python基础(18)常用模块 1 ● 常用模块及其用途 collections模块: 一些扩展的数据类型→Counter, deque, defaultdict, namedtuple, OrderedDict time模块: 三种时间表示方法的转换 案例: 计算时间差 random模块: ① random.random() ② random.randint(1,5) ③ random.choice([1,'23',[4,5]]) ④ random.sample([1,'23',[4…

<Linux内核设计与实现>Chapter 18 读书笔记 一.准备开始 一个bug 一个藏匿bug的内核版本 知道这个bug最早出现在哪个内核版本中. 相关内核代码的知识和运气 想要成功进行调试: 让这些错误重现 抽象出问题 从代码中搜索 二.内核中的bug 1.内核bug的表象: 错误代码 同步时发生的错误,例如共享变量锁定不当 错误的管理硬件 降低所有程序的运行性能 毁坏数据 使得系统处于死锁状态 …… 引用空指针会产生一个oops:垃圾数据会导致系统崩溃. 三.通过打印来调试 内核提供…

原文:零元学Expression Blend 4 - Chapter 18 用实例了解互动控制项「CheckBox」II 延续上一章的CheckBox教学,本章将以实作继续延伸更灵活的运用CheckBox. 看Blend如何把CheckBox变成飞碟! ? 延续上一章的CheckBox教学,本章将以实作继续延伸更灵活的运用CheckBox. 看Blend如何把CheckBox变成飞碟! ? ? ? 灵感取自经典动画!「怪兽大战外星人」!!!!!! ? ? ? 本章需要两张图片,一为幽浮.另一个是…

目录 python day 18 1. thinking in UML读书小感 2. FTP作业重写 2.1 软件目录结构 2.2 FTPClient端脚本 2.3 FTPServer端脚本 python day 18 2019/10/29 1. thinking in UML读书小感 这3天在看谭云杰的thinking in UML这本书,500多页的PDF扫描版,现在只看到279页,算是看完了一半,很多概念都是半懂不懂的,如在云山雾罩中一样.虽然看得不太明白,但是也有一些小感悟. 代码并不是…

17.1 Object-oriented featuresPython is an object-oriented programming language, which means that it provides features that support object-oriented programming.It is not easy to define object-oriented programming, but we have already seen some of its…

12.1 Tuples are immutable(元组是不可变的)A tuple is a sequence of values. The values can be any type, and they are indexed by integers, so in that respect tuples are a lot like lists. The important difference is that tuples are immutable.Syntactically, a tu…

Dictionaries A dictionary is like a list, but more general. In a list, the indices have to be integers; in a dictionary they can be (almost) any type.You can think of a dictionary as a mapping between a set of indices (which are called keys) and a se…

一年之前,我做梦也想不到会来这里写技术总结.误打误撞来到了上海西南某高校,成为了文科专业的工科男,现在每天除了膜ha,就是恶补CS.导师是做计算语言学的,所以当务之急就是先自学计算机自然语言处理,打好底子准备做科研(认真脸). 进入正题,从图书馆找了本“Natural Language Processing with Python” (影印版),书长这个样子,作者是Steven Bird, Ewan Klein和Edward Loper.粘贴个豆瓣链接供参考:https://book.douba…