Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/centrality/tests/test_eigenvector_centrality.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 import math |
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2 import pytest |
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3 |
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4 np = pytest.importorskip("numpy") |
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5 scipy = pytest.importorskip("scipy") |
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6 |
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7 |
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8 import networkx as nx |
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9 from networkx.testing import almost_equal |
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10 |
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11 |
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12 class TestEigenvectorCentrality: |
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13 def test_K5(self): |
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14 """Eigenvector centrality: K5""" |
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15 G = nx.complete_graph(5) |
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16 b = nx.eigenvector_centrality(G) |
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17 v = math.sqrt(1 / 5.0) |
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18 b_answer = dict.fromkeys(G, v) |
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19 for n in sorted(G): |
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20 assert almost_equal(b[n], b_answer[n]) |
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21 nstart = {n: 1 for n in G} |
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22 b = nx.eigenvector_centrality(G, nstart=nstart) |
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23 for n in sorted(G): |
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24 assert almost_equal(b[n], b_answer[n]) |
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25 |
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26 b = nx.eigenvector_centrality_numpy(G) |
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27 for n in sorted(G): |
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28 assert almost_equal(b[n], b_answer[n], places=3) |
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29 |
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30 def test_P3(self): |
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31 """Eigenvector centrality: P3""" |
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32 G = nx.path_graph(3) |
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33 b_answer = {0: 0.5, 1: 0.7071, 2: 0.5} |
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34 b = nx.eigenvector_centrality_numpy(G) |
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35 for n in sorted(G): |
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36 assert almost_equal(b[n], b_answer[n], places=4) |
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37 b = nx.eigenvector_centrality(G) |
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38 for n in sorted(G): |
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39 assert almost_equal(b[n], b_answer[n], places=4) |
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40 |
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41 def test_P3_unweighted(self): |
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42 """Eigenvector centrality: P3""" |
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43 G = nx.path_graph(3) |
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44 b_answer = {0: 0.5, 1: 0.7071, 2: 0.5} |
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45 b = nx.eigenvector_centrality_numpy(G, weight=None) |
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46 for n in sorted(G): |
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47 assert almost_equal(b[n], b_answer[n], places=4) |
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48 |
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49 def test_maxiter(self): |
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50 with pytest.raises(nx.PowerIterationFailedConvergence): |
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51 G = nx.path_graph(3) |
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52 b = nx.eigenvector_centrality(G, max_iter=0) |
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53 |
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54 |
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55 class TestEigenvectorCentralityDirected: |
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56 @classmethod |
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57 def setup_class(cls): |
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58 G = nx.DiGraph() |
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59 |
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60 edges = [ |
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61 (1, 2), |
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62 (1, 3), |
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63 (2, 4), |
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64 (3, 2), |
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65 (3, 5), |
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66 (4, 2), |
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67 (4, 5), |
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68 (4, 6), |
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69 (5, 6), |
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70 (5, 7), |
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76 (8, 6), |
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78 ] |
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79 |
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80 G.add_edges_from(edges, weight=2.0) |
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81 cls.G = G.reverse() |
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82 cls.G.evc = [ |
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83 0.25368793, |
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84 0.19576478, |
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85 0.32817092, |
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86 0.40430835, |
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87 0.48199885, |
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88 0.15724483, |
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89 0.51346196, |
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90 0.32475403, |
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91 ] |
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92 |
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93 H = nx.DiGraph() |
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94 |
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95 edges = [ |
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96 (1, 2), |
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112 (8, 7), |
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113 ] |
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114 |
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115 G.add_edges_from(edges) |
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116 cls.H = G.reverse() |
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117 cls.H.evc = [ |
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118 0.25368793, |
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119 0.19576478, |
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120 0.32817092, |
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121 0.40430835, |
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122 0.48199885, |
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123 0.15724483, |
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124 0.51346196, |
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125 0.32475403, |
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126 ] |
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127 |
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128 def test_eigenvector_centrality_weighted(self): |
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129 G = self.G |
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130 p = nx.eigenvector_centrality(G) |
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131 for (a, b) in zip(list(p.values()), self.G.evc): |
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132 assert almost_equal(a, b, places=4) |
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133 |
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134 def test_eigenvector_centrality_weighted_numpy(self): |
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135 G = self.G |
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136 p = nx.eigenvector_centrality_numpy(G) |
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137 for (a, b) in zip(list(p.values()), self.G.evc): |
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138 assert almost_equal(a, b) |
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139 |
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140 def test_eigenvector_centrality_unweighted(self): |
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141 G = self.H |
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142 p = nx.eigenvector_centrality(G) |
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143 for (a, b) in zip(list(p.values()), self.G.evc): |
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144 assert almost_equal(a, b, places=4) |
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145 |
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146 def test_eigenvector_centrality_unweighted_numpy(self): |
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147 G = self.H |
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148 p = nx.eigenvector_centrality_numpy(G) |
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149 for (a, b) in zip(list(p.values()), self.G.evc): |
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150 assert almost_equal(a, b) |
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151 |
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152 |
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153 class TestEigenvectorCentralityExceptions: |
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154 def test_multigraph(self): |
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155 with pytest.raises(nx.NetworkXException): |
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156 e = nx.eigenvector_centrality(nx.MultiGraph()) |
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157 |
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158 def test_multigraph_numpy(self): |
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159 with pytest.raises(nx.NetworkXException): |
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160 e = nx.eigenvector_centrality_numpy(nx.MultiGraph()) |
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161 |
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162 def test_empty(self): |
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163 with pytest.raises(nx.NetworkXException): |
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164 e = nx.eigenvector_centrality(nx.Graph()) |
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165 |
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166 def test_empty_numpy(self): |
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167 with pytest.raises(nx.NetworkXException): |
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168 e = nx.eigenvector_centrality_numpy(nx.Graph()) |