This pie chart visualizes the distribution of Quidditch house points from a CSV dataset, aggregated by house and displayed with labeled slices and an HTML legend. It uses D3 v6’s `d3.pie` and `d3.arc` generators to compute angles and paths, while a `d3.scaleOrdinal` assigns house colors. The SVG renders slices and text labels, and a separate legend div shows total points and percentages.