Convert nested list into tree picture

I have a JSON/Python nested list which represents a tree, each item being a node, if the node is a list, it is a subtree.

Any easy way to create some pleasing graphics out of that?

[[1, [[4, [[7], [8], [9]]], [5, [[7], [8], [9]]]开发者_高级运维, [6, [[7], [8], [9]]]]], [2, [[4, [[7], [8], [9]]], [5, [[7], [8], [9]]], [6, [[7], [8], [9]]]]], [3, [[4, [[7], [8], [9]]], [5, [[7], [8], [9]]], [6, [[7], [8], [9]]]]]]

This is a neater layout of the JSON itself, which does not help me too much.

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You could look into GraphViz for making basic graph images using its simple dot notation. Then in python you could make a really simple recursive function that generates the dot file and builds the graph.