源码安装：

点击这里下载源码

解压前线装一下必要的包

    yum install python-devel mysql-devel zlib-devel openssl-devel

解压

    tar xf MySQL-python-1.2.3.tar.gz
    cd MySQL-python-1.2.3

修改mysite.cfg，指定mysql-config的路径

使用whereis mysql-config找路径

    vi mysite.cfg
    #找到mysql_config = XXX
    改为你的路径

继续安装

    python setup.py build
    python setup.py install

工具安装：

sudo easy_install mysql-python

sudo pip install mysql-python

出现错误的解决办法
---

```bash
vi ~/.bash_profile
# add
export DYLD_LIBRARY_PATH='/usr/local/mysql/lib';
PATH="$PATH:/usr/local/mysql/bin"

enjoy~

Win下请直接下载编译好的安装包：

请输入链接描述

方法一：

$a = $a^$b;
$b = $b^$a;
$a = $a^$b;

这就是位运算带给我们的奇妙之处！（这种方法只适合于int型和string型，而且位数不能超过8位）

方法二：

list($var1, $var2) = array($var2, $var1);

有时候centos使用yum命令的时候软件下载速度会很慢，还好国内有很多镜像站供大家选择，在此博主为大家总结了一些centos国内镜像站，如果你需要下载centos的iso文件或者相关软件，可以到以下网站下载，速度相当快！

当然，如果你想直接替换掉centos系统内置的yum源地址，可以参考这篇文章Centos源设置，将你的源设为比较快的地址！

软件版本总结

版本号

V（Version）：即版本，通常用数字表示版本号。(如:EVEREST Ultimate v4.20.1188 Beta ) Build：用数字或日期标示版本号的一种方式。(如:VeryCD eMule v0.48a Build 071112) SP：Service Pack，升级包。(如:Windows XP SP 2/Vista SP 1)

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vim常用命令

VIM虽说不长用，然是还是很需要掌握的，VIM功能强大的没话说，就是命令太多不好记！

老高就来慢慢总结一下VIM的常用命令和技巧吧！

命令

选择，删除，复制，粘贴

技巧

快速清空文件

gg
dG

#安装Scarpy踩过的坑

Scrapy是python下一个著名的爬虫，目前最新版为0.24。

这是他的帮助文档->Scrapy 0.24 文档

其中**选择器篇**需要好好研究！

帮助文档里的安装指南写得很宽泛，所以安装出错是在正常不过的事了。(再者说，安装出错确实不是Scrapy的错嘛)

So here is the doc to help you with installing Scrapy.

First of all, before installing, please make sure U have already installed these libs or apps below:

• python version >= 2.7
• python-devel package
• libs:
  1. xml2-dev
  2. xslt-dev
  3. ffi-dev
  4. openssl-dev

If not, commands below may help:

on Redhat/Centos:

yum install python-devel libxml2-devel libxslt-devel libffi-devel openssl-devel bzip2-devel 

on Debian/Ubuntu:

apt-get install python-dev libxml2-dev libxslt1-dev libffi-dev libssl-dev libbz2-dev

If your python version is less than 2.7, this article -> upgrade python may help U in upgrading python.

I have summarized some errors when installing scrapy and hope they can be used as a reference for you.

CompressionError: bz2 module is not available

This usually happens when you have compiled python and use pip install Scrapy command.

The reason is you don't have bzip2 lib installed:

on Redhat/Centos:

yum install bzip2-devel 

on Debian/Ubuntu:

apt-get install libbz2-dev

After you have installed the bzip2 package,you have to compile python again to make bzip module work.

Finally,use pip install --upgrade scrapy to finish the installation.

Setup script exited with error: command 'gcc' failed with exit status 1

The cause is u didn't install python-dev

on Redhat/Centos:

yum install python-devel

on Debian/Ubuntu:

apt-get install python-dev

Finally,use pip install scrapy or easy_install scrapy to finish the installation.

error: Not a recognized archive type: /tmp/easy_install-dayrGH/Twisted-14.0.0.tar.bz2

Haha,that's because you already have installed the package!

UserWarning: You do not have the service_identity module installed.

sudo pip install service_identity

That's all for now.Thank u for viewing.

升级python和安装pip,easy_install和setuptool

新机子装环境什么的最麻烦了，在此记录一下python的升级和包(模块)管理软件

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