bigchaindb/docs/server/source/appendices/install-latest-pip.md

How to Install the Latest pip and setuptools

You can check the version of pip you're using (in your current virtualenv) by doing:

pip -V

If it says that pip isn't installed, or it says pip is associated with a Python version less than 3.5, then you must install a pip version associated with Python 3.5+. In the following instructions, we call it pip3 but you may be able to use pip if that refers to the same thing. See the pip installation instructions.

On Ubuntu 16.04, we found that this works:

sudo apt-get install python3-pip

That should install a Python 3 version of pip named pip3. If that didn't work, then another way to get pip3 is to do sudo apt-get install python3-setuptools followed by sudo easy_install3 pip.

You can upgrade pip (pip3) and setuptools to the latest versions using:

pip3 install --upgrade pip setuptools