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python安装MySQLdb模块及排错

前言本文使用的源码安装及其排错，下列为其他几种安装方式。yum安装：yuminstallMySQL-python-ypip安装：pipinstallpython-mysqlPython安装MySQLdb模块【1】官网下载合适的版本https://pypi.org/project/MySQL-python/或wgethttps://files.pythonhosted.org/packages/a5/e9/51b544da85a36a68debe7a7091

系统 2019-09-27 17:53:28 3127

Python

蒙特卡洛方法以及python实现

蒙特卡洛方法以及python实现1.什么是蒙特卡洛方法(MonteCarlomethod)2.蒙特卡洛方法的基本思想3.应用：蒙特卡洛求定积分常见方法3.1投点法：3.2期望法：3.3蒙特卡洛求定积分4.蒙特卡洛方法python实例1.什么是蒙特卡洛方法(MonteCarlomethod)蒙特卡罗方法也称统计模拟方法，是1940年代中期由于科学技术的发展和电子计算机的发明，而提出的一种以概率统计理论为指导的数值计算方法。是指使用随机数（或更常见的伪随机数）

系统 2019-09-27 17:53:14 3127

编程技术

登录界面开发（2）—仿QQ登录界面

在所有原材料（java中提供的类）都准备好的基础上，这就要求我们能够利用这些材料来开发仿QQ登录界面。为此，我们有以下步骤：一、先要有一个QQ界面，也即是创建一个容器。JFramejf=newJFrame(QQ2011);对窗体进行设置，如设置窗体的大小、窗体不可最大化、窗体居中显示、给设置窗体的背景颜色等。如：设置窗体的大小，jf.setSize(340,250);窗体不可最大化，jf.setResizable(false);窗体居中显示，jf.setL

系统 2019-08-29 23:14:26 3127

编程技术

(第Ⅲ部分结构型模式篇) 第9章装饰模式（Deco

——.NET设计模式系列之十Terrylee，2006年3月概述在软件系统中，有时候我们会使用继承来扩展对象的功能，但是由于继承为类型引入的静态特质，使得这种扩展方式缺乏灵活性；并且随着子类的增多（扩展功能的增多），各种子类的组合（扩展功能的组合）会导致更多子类的膨胀。如何使“对象功能的扩展”能够根据需要来动态地实现？同时避免“扩展功能的增多”带来的子类膨胀问题？从而使得任何“功能扩展变化”所导致的影响将为最低？这就是本文要讲的Decorator模式。意图

系统 2019-08-29 23:09:31 3127

编程技术

Google 10 周年庆专题页面讲述辉煌历史

Google搜索引擎早在本世纪初开始发展，2001年上线，至今已有10年时间，这个搜索引擎项目的启动和发展彻底改变了国际互联网的面貌，让人们可以在网络中更快速地定位到自己想要的信息。Google今天上线了一个10周年页面，详细讲述了他们的发展史，这黄金的10年Google都为我们做了些什么？Google10周年庆转自：http://www.oschina.net/news/15345/google-10-years本文是使用B3logSolo从简约设计の艺

系统 2019-08-29 23:08:17 3127

编程技术

以一种"廉价"的方式获取页面的标题(downmoon)

有朋友问到：“我需要得到一个webpage的title，因为这个title一般都比较靠前，只要取得html的前面少量内容就可以了。因为要取得很多个页面的title,如果下载整个htmlcode，肯定比较浪费时间。.net好像没有现成的类可以干这件事情(取得部分html)，我应该如何去实现？”一种比较"廉价"(即较小成本条件下)的解决思路：第一步：取出含有页面title部分的最小集合。这是“廉价”的关键！第二步：用正则表达式取出和</title</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:21:16</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3127</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/13744" title="自定义图文并茂的Button" target="_blank" onclick="return recordId('',)">自定义图文并茂的Button </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/13744" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/4.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/13744';}else{window.open('/article/13744');}" style="cursor: pointer;">anroid内置了Button和ImageButton，但是没有提供既能显示图片又能显示文字的button。这里我自定义了一个ImageTextButton其中了XML文件中使用了自定义属性custom:icon="@drawable/icon"下面是ImageTextButton源码：importandroid.content.Context;importandroid.graphics.Bitmap;importandroid.graphics.Bit</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:07:33</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3127</span></span>  </p> </article><article class="excerpt"> <header> <a title="各行各业" class="label label-important zj-del-target" href="/category/38">各行各业<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/1743" title="数据库压力测试思路" target="_blank" onclick="return recordId('',)">数据库压力测试思路 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/1743" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/16.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/1743';}else{window.open('/article/1743');}" style="cursor: pointer;">原文是E文，做一下翻译并且提取一些重要的思路。1.定义业务规格Whatareyourmostcriticalbusinessprocessesandhowoftenaretheyprocessed(e.g.numberofsalesactivitiesperday,numberofclientrequestsperday,etc.)最重要的业务流程是什么，使用频率如何Whatisregarded(required)asacceptableresponset</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:32:39</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3127</span></span>  </p> </article><article class="excerpt"> <header> <a title="各行各业" class="label label-important zj-del-target" href="/category/38">各行各业<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/288" title="Mono介绍" target="_blank" onclick="return recordId('',)">Mono介绍 </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/288" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/14.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/288';}else{window.open('/article/288');}" style="cursor: pointer;">转载自：最近可能要用到Mono了，找了点资料，分享下Mono是一个由Novell公司（先前是Ximian）主持的项目。该项目的目标是创建一系列符合ECMA标准（Ecma-334和Ecma-335）的.NET工具，包括C#编译器和共通語言執行平臺。与微软的.NETFramework不同，Mono项目不仅可以运行于Windows系统上，还可以运行于Linux，FreeBSD，Unix，MacOSX和Solaris。Mono现由Novell持有双重许可，这和Qt</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-12 01:31:57</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3127</span></span>  </p> </article><article class="excerpt"> <header> <a title="编程技术" class="label label-important zj-del-target" href="/category/30">编程技术<i class="label-arrow"></i></a> <h2> <a class="zj-titles zj-del-target" href="/article/16142" title="DataRabbit 轻量的数据访问框架（08）－－ Dat" target="_blank" onclick="return recordId('',)">DataRabbit 轻量的数据访问框架（08）－－ Dat </a> </h2> </header> <div class="focus"> <a class="zj-del-target" href="/article/16142" target="_blank"><img style="width: 200px; height: 123px;" class="thumb" src="/Public/static/images/article/7.jpg" alt="" title=""></a> </div> <span class="note" onclick="if (jq.browser.versions.mobile) {window.location.href='/article/16142';}else{window.open('/article/16142');}" style="cursor: pointer;">（完全限定类名：DataRabbit.Application.TransactionScopeFactory，DataRabbit.Application.TransactionScope）关于TransactionScopeFactory首先要提醒以下几点：（1）TransactionScopeFactory是DataRabbit框架的入口点，所有的访问器、分页管理器、大纲操作者都可以从TransactionScopeFactory生成的Transact</span> <p class="auth-span"> <span class="muted"><i class="fa fa-user"></i><span class="zj-icon-text">系统</span></span> <span class="muted"><i class="fa fa-clock-o"></i><span class="zj-icon-text">2019-08-29 22:37:26</span></span> <span class="muted"><i class="fa fa-eye"></i><span class="zj-icon-text">3126</span></span>  </p> </article><div class="pagination" style="display:;"> <ul><li><a href="/search/mysql/1/p/1">首页</a></li> <li class="prev-page"><a href="/search/mysql/1/p/410">上一页</a></li> <li><a href="/search/mysql/1/p/409">409</a></li><li><a href="/search/mysql/1/p/410">410</a></li><li class="active"><span>411</span></li><li><a 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