/usr/lib/python2.7/dist-packages/networkx/utils/tests/test_rcm.py is in python-networkx 1.8.1-0ubuntu3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 | from nose.tools import *
from networkx.utils import reverse_cuthill_mckee_ordering
import networkx as nx
def test_reverse_cuthill_mckee():
# example graph from
# http://www.boost.org/doc/libs/1_37_0/libs/graph/example/cuthill_mckee_ordering.cpp
G = nx.Graph([(0,3),(0,5),(1,2),(1,4),(1,6),(1,9),(2,3),
(2,4),(3,5),(3,8),(4,6),(5,6),(5,7),(6,7)])
rcm = list(reverse_cuthill_mckee_ordering(G,start=0))
assert_equal(rcm,[9, 1, 4, 6, 7, 2, 8, 5, 3, 0])
rcm = list(reverse_cuthill_mckee_ordering(G))
assert_equal(rcm,[0, 8, 5, 7, 3, 6, 4, 2, 1, 9])
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