python每日一错——Some packages could not be installed. This may mean that you have........

今天有了测试任务，需要测试一个python库的运行效率，就按照老板的意思来了，结果在成功的前一步，也就是运行test时突然说缺了“python.h”文件，既然是python.h这个头文件，自然包含在libpython-dev咯，就想当然去apt-get了，结果竟然报了如题的错。。如下：

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libpython3.5-dev : Depends: libpython3.5-stdlib (= 3.5.1-10) but 3.5.2-2ubuntu0~16.04.1 is to be installed
                    Depends: libpython3.5 (= 3.5.1-10) but 3.5.2-2ubuntu0~16.04.1 is to be installed
E: Unable to correct problems, you have held broken packages.

嗨我这小脾气……我是在公司服务器上的docker里面玩的，这unmet错误是源里没有这个库，于是又想当然去换了源，结果换源也不行，主要是换了国内源，公司服务器用的是接到美帝的proxy，干脆在update的时候就不行了。。

解决方法：去 https://launchpad.net/ubuntu 搜索需要的deb包，然后到本地下载，然后dpkg -i xxx.deb就好了。。。。