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annotate env/lib/python3.9/site-packages/networkx/algorithms/bipartite/tests/test_redundancy.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Unit tests for the :mod:`networkx.algorithms.bipartite.redundancy` module. |
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2 |
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3 """ |
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4 |
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5 import pytest |
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6 |
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7 from networkx import cycle_graph |
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8 from networkx import NetworkXError |
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9 from networkx.algorithms.bipartite import complete_bipartite_graph |
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10 from networkx.algorithms.bipartite import node_redundancy |
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11 |
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12 |
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13 def test_no_redundant_nodes(): |
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14 G = complete_bipartite_graph(2, 2) |
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15 rc = node_redundancy(G) |
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16 assert all(redundancy == 1 for redundancy in rc.values()) |
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17 |
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18 |
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19 def test_redundant_nodes(): |
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20 G = cycle_graph(6) |
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21 edge = {0, 3} |
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22 G.add_edge(*edge) |
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23 redundancy = node_redundancy(G) |
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24 for v in edge: |
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25 assert redundancy[v] == 2 / 3 |
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26 for v in set(G) - edge: |
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27 assert redundancy[v] == 1 |
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28 |
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29 |
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30 def test_not_enough_neighbors(): |
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31 with pytest.raises(NetworkXError): |
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32 G = complete_bipartite_graph(1, 2) |
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33 node_redundancy(G) |