This repo contains a small but sufficient data chunk of ГАР БД ФИАС for this tutorial. Please note: file sizes are going to inflate ~10 times after extraction. Please make sure you have enough space on your disk.
If you want to work with up-to-date and full GAR database, you can find it here. It is not guaranteed that the code will work for every region and update.
Just follow the link to open Colab Notebook. An explanation could be found in the article.