A brief summary of Graphviz in python (explained only for mac)

brew install graphviz

pip install graphviz

from graphviz import Digraph

#Output as png
dg = Digraph(format='png')

dg.node('1') #Set the node labeled 1

dg.node('2') #Set the node labeled 2.

dg.render('./test/dgraph1') #Save to test folder as dgraph(Do not write the extension)

from graphviz import Digraph

dg = Digraph(format='png')

dg.node('1') #Set the node labeled 1
dg.node('2') #Set the node labeled 2.

dg.edge('1','2') #Draw an arrow from node 1 to node 2

dg.render('./test/dgraph2') #Save to test folder as dgraph

from graphviz import Digraph

dg = Digraph(format='png')

#Set the default to ○
dg.attr("node", shape="circle")

dg.node('1') #Set the node labeled 1(○)
dg.node('2') #Set the node labeled 1 (○)
dg.node('3',shape='box') #Change a specific node to □


dg.render('./test/dgraph') #Save to test folder as dgraph

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