/usr/share/doc/python-pygraphviz-doc/examples/subgraph.py is in python-pygraphviz-doc 1.4~rc1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #!/usr/bin/env python
from __future__ import absolute_import
from __future__ import unicode_literals
from __future__ import print_function
from __future__ import division
import pygraphviz as pgv
A=pgv.AGraph()
# add some edges
A.add_edge(1,2)
A.add_edge(2,3)
A.add_edge(1,3)
A.add_edge(3,4)
A.add_edge(3,5)
A.add_edge(3,6)
A.add_edge(4,6)
# make a subgraph with rank='same'
B=A.add_subgraph([4,5,6],name='s1',rank='same')
B.graph_attr['rank']='same'
print(A.string()) # print dot file to standard output
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