系统信息：Ubuntu 18.04.4 LTS（GNU/Linux 4.15.0-88-generic x86_64）
尝试使用 apt 安装或卸载时出现错误：
trever@server:~$ sudo apt-get install ctorrent
[sudo] password for trever:
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-pkg-resources : Depends: python:any (< 2.8)
Depends: python:any (>= 2.7.5-5~)
python-virtualenv : Depends: python but it is not going to be installed
Recommends: virtualenv but it is not going to be installed
E: Unmet dependencies. …