Hi @sameeranade,
You can look at “load_house_data()” in the lab_utils_multi.py file, which you can find by choosing File/Open to look at the files used by the notebook.
If you want to download all the files for creating and running your own copy of the notebook, you can follow the instructions for Method 2 for downloading your notebook in this post: Downloading your Notebook and Refreshing your Workspace
One side comment - in the future, it’s better to start a new post with your question, rather than adding on to an old post. A new post will be easier for mentors to spot which will help you get a faster response.