buzz requires Python 3.6 or higher. You can install it easily with pip (ideally, from inside a virtual environment):

pip install buzz

To also include the frontend, buzzword, you can use:

pip install buzz[word]

pip install git+https://github.com/interrogator/buzz

Once installed, you'll either want to work within a Python session, or, if you installed buzzword, set up and run the graphical interface.