ros已经卸载了，但是其中的python-rosinstall python-rosdep python-wstool python3-wstool还存留在 /var/lib/dpkg/status中，使dpkg无法正常工作，输出如下异常：
he following error that will prevent you from installing other packages –
‘The package <package name> needs to be reinstalled, but I can’t find an archive for it’
此时需要将 /var/lib/dpkg/status 中有关python-rosinstall python-rosdep python-wstool python3-wstool删除，例如有关python-rosinstall的项：Package: python-rosinstall
Status: deinstall reinstreq half-configured
Priority: optional
Section: python
Installed-Size: 159
Maintainer: Tully Foote <[email protected]>
Architecture: all
Version: 0.7.8-1
Config-Version: 0.7.8-1
Depends: python (>= 2.7), python (<< 2.8), python:any (>= 2.7.1-0ubuntu2), python-vcstools (>= 0.1.38), python-yaml, python-rosdistro (>= 0.3.0), python-catkin-pkg, python-wstool (>= 0.1.12), subversion, mercurial, git-core, bzr
Conflicts: python3-rosinstall
Description: The installer for ROS
The installer for ROS
具体操作如下：
1. sudo cp /var/lib/dpkg/status status.bkp
2. sudo gedit /var/lib/dpkg/status (打开文件status文件)
3. 在文件中删除有关python-rosinstall python-rosdep python-wstool python3-wstool的项，保存即可。
参考：
http://www.ihaveapc.com/2011/10/fix-annoying-the-package-needs-to-be-reinstalled-but-i-cant-find-an-archive-for-it-error-in-linux-mint-ubuntu/