VERY OLD!!! Where are maintainers? https://github.com/pypa/pip/issues/1093#issuecomment-67775312
Pip is great for managing your entire python distribution. There is some need for caution; pip keeps packages in a different location than packages installed by apt, so you may sometimes run into unexpected behavior if you have multiple versions of packages. Also, you will need to run different versions of pip if you have both python2 and python3.