Graph plotting #130
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Graph plotting #130
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Adds basic support for graph plotting. When calling
.draw()on aGraphinstance that's already been executed at least once (i.e., by calling.run()), a graph diagram of all transformations is generated via pygraphviz. Here's what it looks like for theGraphconstructed in one of the tests:We probably want to tweak this some more; e.g., it would be nice to differentiate between explicit transformations and implicit conversions, treat all of the different ExtractorResult nodes as a single node, etc... But for now, I think this is already quite useful.