:~/Downloads$ python --version
Python 3.5.2
:~/Downloads$ python get-pip.py
Requirement already up-to-date: pip in /home/XXX/.local/lib/python3.5/site-packages
:~/Downloads$ pip install -U pip
The program 'pip3' is currently not installed. You can install it by typing:
sudo apt install python3-pip
:~/Downloads$ pip install scipy
The program 'pip3' is currently not installed. You can install it by typing:
sudo apt install python3-pip