iterable_iterator_generator.dot

digraph iterable_iterator {
    subgraph cluster1 {
        label = "iterables";
        "may create iterators with iter(x)" [style=filled,color=white];
        "may create iterators with iter(x)" -> "track a 'position' and have .next()" [style=invis];
        subgraph cluster2 {
            label = "iterators";
            "track a 'position' and have .next()" [style=filled,color=white];
            "track a 'position' and have .next()" -> "created with a generator function or expression" [style=invis];
            subgraph cluster3 {
                label = "generators";
                "created with a generator function or expression" [style=filled,color=white];
            }

        }
    }
}