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What I Have Lived For by Bertrand Russell Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind. These passions, like great winds, hav…
What I have lived for- Bertrand Russell   Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind. These passions, like great winds, hav…
[it-ebooks]电子书列表   [2014]: Learning Objective-C by Developing iPhone Games || Leverage Xcode and Objective-C to develop iPhone games http://it-ebooks.info/book/3544/Learning Web App Development || Build Quickly with Proven JavaScript Techniques http:…
# 一.前言 *** 上一篇演示了如何使用requests模块向网站发送http请求,获取到网页的HTML数据.这篇来演示如何使用BeautifulSoup模块来从HTML文本中提取我们想要的数据. update on 2016-12-28:之前忘记给BeautifulSoup的官网了,今天补上,顺便再补点BeautifulSoup的用法. # 二.运行环境 *** 我的运行环境如下: - 系统版本 Windows10. - Python版本 Python3.5,推荐使用Anaconda 这个科…
SSL vs TLS vs STARTTLS There's often quite a bit of confusion around the different terms SSL, TLS and STARTTLS. SSL and TLS both provide a way to encrypt a communication channel between two computers (e.g. your computer and our server). TLS is the su…
BeautifulSoup的文档见 https://www.crummy.com/software/BeautifulSoup/bs4/doc.zh/ 其中.contents 会将换行也记录为一个子节点 from bs4 import BeautifulSoup html_doc = """ <html><head><title>The Dormouse's story</title></head> <body…
爬虫,个人理解就是:利用模拟“操作浏览器”的过程,自动获取我们想要的数据(或者说信息,比如图片啊) 为何要学爬虫:爬取数据,为我所用(相当于可以把一类数据整合起来) 一.简单静态网页爬虫架构: 1.Background Knowledge:URL(统一资源定位符,能帮助我们定位到网页在网络中的位置,URI 是统一资源标志符),HTTP协议 2.构架: 需要一个爬虫调度器管理下面的程序,涉及多线程管理等(比如说申请网页的阻塞时间可以用来建立新的申请,这些资源分配由操作系统完成) URL管理器,防止…
题目 Source http://acm.hdu.edu.cn/showproblem.php?pid=5977 Description When God made the first man, he put him on a beautiful garden, the Garden of Eden. Here Adam lived with all animals. God gave Adam eternal life. But Adam was lonely in the garden, s…
"I worked up a full implementation as well but I decided that it was too complicated to post in the blog. What I was really trying to get across was that immutable data structures were possible and not that hard; a full-on finger tree implementation…
Comet技术原理 来自维基百科:Comet是一种用于web的技术,能使服务器能实时地将更新的信息传送到客户端,而无须客户端发出请求,目前有两种实现方式,长轮询和iframe流. 简单的说是一种基于现有Http协议基础上的长轮询技术,之所有会产生这种技术的主要原因是Http协议是无状态的所以客户端和服务端之间没办法建立起一套长时间的连接.比如我们要做一个聊天室,在Web环境下我们通常不能从服务端推送消息到浏览器里,而只能通过每个客户端不断的轮询服务器,以获取最新的消息,这样一来效率非常低,而且不…