我在安装时遇到问题python-dev。当我尝试安装另一个 Python 包并出现错误时，这一切都开始了：
SystemError: Cannot compile 'Python.h'. Perhaps you need to install python-dev.
我试过了，sudo apt-get install python-dev但得到了错误：
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.
然后我尝试sudo apt-get install python2.7-dev并得到了错误：
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 …我正在尝试在 Windows 主机上运行的 Ubuntu 16.04 LTS（64 位）来宾上安装 python-dev。我尝试使用 apt-get 然后通过 aptitude 进行安装，但我似乎遇到了错误。
~$sudo aptitude install python-dev
给，
The following NEW packages will be installed:
libexpat1-dev{ab} libpython-dev{a} libpython2.7-dev{ab} python-dev python2.7-dev{ab}
0 packages upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 28.2 MB of archives. After unpacking 42.1 MB will be used.
The following packages have unmet dependencies:
python2.7-dev : Depends: python2.7 (= 2.7.11-7ubuntu1) but 2.7.12-1~16.04 is installed.
Depends: libpython2.7 (= 2.7.11-7ubuntu1) but 2.7.12-1~16.04 is installed. …