pre rm ppa

# pre rm ppa
The Python Packaging Authority (PyPA) is a working group that maintains many of the relevant projects in Python packaging.

To install Pipenv, using this PPA (for Ubuntu 17.10):

$ sudo apt install software-properties-common python-software-properties
$ sudo add-apt-repository ppa:pypa/ppa
$ sudo apt update
$ sudo apt install pipenv
 More info: https://launchpad.net/~pypa/+archive/ubuntu/ppa