Sankey generation API. VESankey contains functionality to define a network of nodes and their connections, and generate a Sankey diagram based on the input data.
Usage:
sankey = iesve.VESankey('depth')
sankey.add_column_names(col_titles)
sankey.set_title(‘Sankey Diagram’)
sankey.add_node_columns(nodes_cols)
sankey.add_connections(connections)
sankey.generate_sankey()
sankey.save_svg(svg_file)