There's lots of python libraries for graph visualization, it's probably force-directed layout or something else similar.
The name is indeed a reference to data warehouse design, where you normally have heavily normalized data in a snowflake schema. The Kimball book is the canonical one on data warehouse design.
The name is indeed a reference to data warehouse design, where you normally have heavily normalized data in a snowflake schema. The Kimball book is the canonical one on data warehouse design.