问题 This is my first time of doing visualization from hierarchical data in dictionary format with Python. Last part of the data looks like this: d = {^2820: [^391, ^1024], ^2821: [^759, 'w', ^118, ^51], ^2822: [^291, 'o'], ^2823: [^25, ^64], ^2824: [^177, ^2459], ^2825: [^338, ^1946], ^2826: [^186, ^1511], ^2827: [^162, 'i']} So I have indices on lists referring back to the keys (index) of the dictionary. I suppose this could be used as a base structure for the visualization, please correct me if