这是我在sudo apt-get install --reinstall python之后得到的
$ sudo apt-get install --reinstall python
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
python : PreDepends: python-minimal (= 2.7.15~rc1-1) but it is not going to be installed
Depends: python2.7 (>= 2.7.15~rc1-1~) but it is not going to be installed
Depends: libpython-stdlib (= 2.7.15~rc1-1) but it is not going to be installed
python3-gi-cairo : Depends: python3-gi (= 3.26.1-2ubuntu1) but 3.26.1-2 is to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).