To get started:
nix-shell
jupyter-notebook FillInTheGaps.ipynb
If you are unfamiliar with the nix package manager, simply make sure that you have the dependencies listed in the shell.nix file.
Alternately, install nix with:
curl https://nixos.org/nix/install | sh
Even though this source is trust-worthy, remember that it is always good form to look at the code before running the above command!