Python之——解决Kali安装python-dev时依赖出错的问题

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一、问题现象

在Kali下写python代码的时候，有时会需要安装一些第三方的库，安装的时候提示：

SystemError: Cannot compile 'Python.h'. Perhaps you need to install python-dev.  

然后按照提示sudo apt-get install Python-dev又出错，提示：

The following packages have unmet dependencies:  
 python-dev : Depends: python2.7-dev (>= 2.7.3) but it is not going to be installed  
E: Unable to correct problems, you have held broken packages.

于是我又sudo apt-get install python2.7-dev，显示依赖错误：

The following packages have unmet dependencies：  
 python2.7-dev : Depends: python2.7 (= 2.7.3-0ubuntu3) but 2.7.3-0ubuntu3.1 is to be installed  
                 Depends: libpython2.7 (= 2.7.3-0ubuntu3) but 2.7.3-0ubuntu3.1 is to be installed  

二、问题原因

出现这个问题的原因主要是默认情况下，Kali为python2.7-dev提供的软件源与python-2.7 2.7.3-0Kali3.1的源不一致，需要更新软件源。

三、问题解决

可以使用命令apt-cache show python2.7查看到你安装python-2.7 2.7.3-0Kali3.1是从源precise-updates/main安装的，而python2.7-dev默认是从源precise/main安装的，因此安装python2.7-dev之前需要更新软件源。
使用如下的代码可以安装成功

1、更新镜像源

vim /etc/apt/sources.list
deb http://mirrors.ustc.edu.cn/kali kali main non-free contrib
deb-src http://mirrors.ustc.edu.cn/kali kali main non-free contrib
deb http://mirrors.ustc.edu.cn/kali-security kali/updates main contrib non-free
apt-get update

2、安装Python依赖

sudo apt-get update  
sudo apt-get install python2.7-dev
sudo apt-get install python-dev