weight

type: int | double, default: 1, minimum: 0(dot,twopi), 1(neato,fdp)

Weight of edge.

In dot, the heavier the weight, the shorter, straighter and more vertical the edge is.

For twopi, weight=0 indicates the edge should not be used in constructing a spanning tree from the root.

For other layouts, a larger weight encourages the layout to make the edge length closer to that specified by the len attribute.

Weights in dot must be integers.

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