DrawGViz(Graph, Layout, PltFNm, Desc, NodeLabelH)

Draws a given Graph using a selected GraphViz Layout engine with nodes labeled. Creates a file with name PltFNm.


  • Graph: graph (input)

    A Snap.py graph or a network.

  • Layout: TGVizLayout (input)

    One of gvlDot, gvlNeato, gvlTwopi, gvlCirco, gvlSfdp. The type of layout for the graph.

  • PltFNm: string (input)

    Output filename (extension .ps, .png, .gif) determines the output format.

  • Desc: string (input)

    A string describing the visualization.

  • NodeLabelH: TIntStrH, a hash table of int keys and string values (input)

    Maps node ids to node labels.

Return value:

  • None

The following example shows how to draw the graph for TNGraph, TUNGraph, and TNEANet:

import snap

Graph = snap.GenRndGnm(snap.PNGraph, 10, 50)
labels = snap.TIntStrH()
for NI in Graph.Nodes():
        labels[NI.GetId()] = str(NI.GetId())
snap.DrawGViz(Graph, snap.gvlDot, "output.png", " ", labels)

UGraph = snap.GenRndGnm(snap.PUNGraph, 10, 50)
labels = snap.TIntStrH()
for NI in UGraph.Nodes():
    labels[NI.GetId()] = str(NI.GetId())
snap.DrawGViz(UGraph, snap.gvlDot, "output.png", " ", labels)

Network = snap.GenRndGnm(snap.PNEANet, 10, 50)
labels = snap.TIntStrH()
for NI in Network.Nodes():
    labels[NI.GetId()] = str(NI.GetId())
snap.DrawGViz(Network, snap.gvlDot, "output.png", " ", labels)

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