Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/utils/tests/test_rcm.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 from networkx.utils import reverse_cuthill_mckee_ordering |
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2 import networkx as nx |
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3 |
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4 |
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5 def test_reverse_cuthill_mckee(): |
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6 # example graph from |
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7 # http://www.boost.org/doc/libs/1_37_0/libs/graph/example/cuthill_mckee_ordering.cpp |
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8 G = nx.Graph( |
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9 [ |
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10 (0, 3), |
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11 (0, 5), |
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12 (1, 2), |
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13 (1, 4), |
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14 (1, 6), |
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15 (1, 9), |
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16 (2, 3), |
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17 (2, 4), |
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18 (3, 5), |
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19 (3, 8), |
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20 (4, 6), |
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21 (5, 6), |
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22 (5, 7), |
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23 (6, 7), |
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24 ] |
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25 ) |
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26 rcm = list(reverse_cuthill_mckee_ordering(G)) |
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27 assert rcm in [[0, 8, 5, 7, 3, 6, 2, 4, 1, 9], [0, 8, 5, 7, 3, 6, 4, 2, 1, 9]] |
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28 |
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29 |
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30 def test_rcm_alternate_heuristic(): |
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31 # example from |
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32 G = nx.Graph( |
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33 [ |
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34 (0, 0), |
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35 (0, 4), |
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36 (1, 1), |
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37 (1, 2), |
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38 (1, 5), |
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39 (1, 7), |
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40 (2, 2), |
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41 (2, 4), |
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42 (3, 3), |
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43 (3, 6), |
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44 (4, 4), |
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45 (5, 5), |
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46 (5, 7), |
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47 (6, 6), |
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48 (7, 7), |
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49 ] |
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50 ) |
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51 |
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52 answers = [ |
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53 [6, 3, 5, 7, 1, 2, 4, 0], |
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54 [6, 3, 7, 5, 1, 2, 4, 0], |
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55 [7, 5, 1, 2, 4, 0, 6, 3], |
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56 ] |
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57 |
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58 def smallest_degree(G): |
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59 deg, node = min((d, n) for n, d in G.degree()) |
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60 return node |
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61 |
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62 rcm = list(reverse_cuthill_mckee_ordering(G, heuristic=smallest_degree)) |
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63 assert rcm in answers |