I have installed it, but how to use it?

$ python3 -m pip install --user blurb
Collecting blurb
  Using cached blurb-1.0-py3-none-any.whl
Installing collected packages: blurb
Successfully installed blurb-1.0
$ python3 -m blurb
/usr/bin/python3: No module named blurb

It's on your path.  Just run

% blurb

from inside a CPython repo.

I'm amazed that your first thought was "python -m blurb".

/arry