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annotate planemo/lib/python3.7/site-packages/networkx/tests/test_relabel.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 #!/usr/bin/env python
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2 import pytest
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3 import networkx as nx
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4 from networkx.algorithms.operators import *
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5 from networkx.generators.classic import empty_graph
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6 from networkx.testing import assert_nodes_equal, assert_edges_equal
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7
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8
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9 class TestRelabel():
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10 def test_convert_node_labels_to_integers(self):
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11 # test that empty graph converts fine for all options
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12 G = empty_graph()
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13 H = nx.convert_node_labels_to_integers(G, 100)
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14 assert list(H.nodes()) == []
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15 assert list(H.edges()) == []
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16
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17 for opt in ["default", "sorted", "increasing degree", "decreasing degree"]:
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18 G = empty_graph()
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19 H = nx.convert_node_labels_to_integers(G, 100, ordering=opt)
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20 assert list(H.nodes()) == []
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21 assert list(H.edges()) == []
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22
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23 G = empty_graph()
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24 G.add_edges_from([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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25 H = nx.convert_node_labels_to_integers(G)
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26 degH = (d for n, d in H.degree())
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27 degG = (d for n, d in G.degree())
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28 assert sorted(degH) == sorted(degG)
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29
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30 H = nx.convert_node_labels_to_integers(G, 1000)
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31 degH = (d for n, d in H.degree())
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32 degG = (d for n, d in G.degree())
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33 assert sorted(degH) == sorted(degG)
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34 assert_nodes_equal(H.nodes(), [1000, 1001, 1002, 1003])
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35
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36 H = nx.convert_node_labels_to_integers(G, ordering="increasing degree")
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37 degH = (d for n, d in H.degree())
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38 degG = (d for n, d in G.degree())
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39 assert sorted(degH) == sorted(degG)
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40 assert H.degree(0) == 1
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41 assert H.degree(1) == 2
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42 assert H.degree(2) == 2
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43 assert H.degree(3) == 3
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44
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45 H = nx.convert_node_labels_to_integers(G, ordering="decreasing degree")
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46 degH = (d for n, d in H.degree())
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47 degG = (d for n, d in G.degree())
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48 assert sorted(degH) == sorted(degG)
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49 assert H.degree(0) == 3
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50 assert H.degree(1) == 2
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51 assert H.degree(2) == 2
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52 assert H.degree(3) == 1
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53
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54 H = nx.convert_node_labels_to_integers(G, ordering="increasing degree",
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55 label_attribute='label')
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56 degH = (d for n, d in H.degree())
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57 degG = (d for n, d in G.degree())
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58 assert sorted(degH) == sorted(degG)
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59 assert H.degree(0) == 1
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60 assert H.degree(1) == 2
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61 assert H.degree(2) == 2
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62 assert H.degree(3) == 3
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63
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64 # check mapping
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65 assert H.nodes[3]['label'] == 'C'
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66 assert H.nodes[0]['label'] == 'D'
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67 assert H.nodes[1]['label'] == 'A' or H.nodes[2]['label'] == 'A'
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68 assert H.nodes[1]['label'] == 'B' or H.nodes[2]['label'] == 'B'
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69
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70 def test_convert_to_integers2(self):
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71 G = empty_graph()
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72 G.add_edges_from([('C', 'D'), ('A', 'B'), ('A', 'C'), ('B', 'C')])
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73 H = nx.convert_node_labels_to_integers(G, ordering="sorted")
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74 degH = (d for n, d in H.degree())
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75 degG = (d for n, d in G.degree())
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76 assert sorted(degH) == sorted(degG)
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77
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78 H = nx.convert_node_labels_to_integers(G, ordering="sorted",
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79 label_attribute='label')
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80 assert H.nodes[0]['label'] == 'A'
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81 assert H.nodes[1]['label'] == 'B'
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82 assert H.nodes[2]['label'] == 'C'
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83 assert H.nodes[3]['label'] == 'D'
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84
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85 def test_convert_to_integers_raise(self):
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86 with pytest.raises(nx.NetworkXError):
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87 G = nx.Graph()
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88 H = nx.convert_node_labels_to_integers(G, ordering="increasing age")
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89
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90 def test_relabel_nodes_copy(self):
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91 G = nx.empty_graph()
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92 G.add_edges_from([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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93 mapping = {'A': 'aardvark', 'B': 'bear', 'C': 'cat', 'D': 'dog'}
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94 H = nx.relabel_nodes(G, mapping)
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95 assert_nodes_equal(H.nodes(), ['aardvark', 'bear', 'cat', 'dog'])
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96
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97 def test_relabel_nodes_function(self):
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98 G = nx.empty_graph()
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99 G.add_edges_from([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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100 # function mapping no longer encouraged but works
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101
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102 def mapping(n):
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103 return ord(n)
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104 H = nx.relabel_nodes(G, mapping)
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105 assert_nodes_equal(H.nodes(), [65, 66, 67, 68])
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106
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107 def test_relabel_nodes_graph(self):
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108 G = nx.Graph([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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109 mapping = {'A': 'aardvark', 'B': 'bear', 'C': 'cat', 'D': 'dog'}
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110 H = nx.relabel_nodes(G, mapping)
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111 assert_nodes_equal(H.nodes(), ['aardvark', 'bear', 'cat', 'dog'])
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112
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113 def test_relabel_nodes_orderedgraph(self):
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114 G = nx.OrderedGraph()
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115 G.add_nodes_from([1, 2, 3])
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116 G.add_edges_from([(1, 3), (2, 3)])
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117 mapping = {1: 'a', 2: 'b', 3: 'c'}
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118 H = nx.relabel_nodes(G, mapping)
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119 assert list(H.nodes) == ['a', 'b', 'c']
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120
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121 def test_relabel_nodes_digraph(self):
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122 G = nx.DiGraph([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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123 mapping = {'A': 'aardvark', 'B': 'bear', 'C': 'cat', 'D': 'dog'}
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124 H = nx.relabel_nodes(G, mapping, copy=False)
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125 assert_nodes_equal(H.nodes(), ['aardvark', 'bear', 'cat', 'dog'])
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126
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127 def test_relabel_nodes_multigraph(self):
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128 G = nx.MultiGraph([('a', 'b'), ('a', 'b')])
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129 mapping = {'a': 'aardvark', 'b': 'bear'}
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130 G = nx.relabel_nodes(G, mapping, copy=False)
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131 assert_nodes_equal(G.nodes(), ['aardvark', 'bear'])
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132 assert_edges_equal(G.edges(), [('aardvark', 'bear'), ('aardvark', 'bear')])
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133
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134 def test_relabel_nodes_multidigraph(self):
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135 G = nx.MultiDiGraph([('a', 'b'), ('a', 'b')])
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136 mapping = {'a': 'aardvark', 'b': 'bear'}
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137 G = nx.relabel_nodes(G, mapping, copy=False)
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138 assert_nodes_equal(G.nodes(), ['aardvark', 'bear'])
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139 assert_edges_equal(G.edges(), [('aardvark', 'bear'), ('aardvark', 'bear')])
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140
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141 def test_relabel_isolated_nodes_to_same(self):
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142 G = nx.Graph()
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143 G.add_nodes_from(range(4))
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144 mapping = {1: 1}
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145 H = nx.relabel_nodes(G, mapping, copy=False)
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146 assert_nodes_equal(H.nodes(), list(range(4)))
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147
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148 def test_relabel_nodes_missing(self):
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149 with pytest.raises(KeyError):
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150 G = nx.Graph([('A', 'B'), ('A', 'C'), ('B', 'C'), ('C', 'D')])
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151 mapping = {0: 'aardvark'}
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152 G = nx.relabel_nodes(G, mapping, copy=False)
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153
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154 def test_relabel_copy_name(self):
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155 G = nx.Graph()
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156 H = nx.relabel_nodes(G, {}, copy=True)
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157 assert H.graph == G.graph
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158 H = nx.relabel_nodes(G, {}, copy=False)
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159 assert H.graph == G.graph
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160 G.name = "first"
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161 H = nx.relabel_nodes(G, {}, copy=True)
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162 assert H.graph == G.graph
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163 H = nx.relabel_nodes(G, {}, copy=False)
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164 assert H.graph == G.graph
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165
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166 def test_relabel_toposort(self):
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167 K5 = nx.complete_graph(4)
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168 G = nx.complete_graph(4)
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169 G = nx.relabel_nodes(G, dict([(i, i + 1) for i in range(4)]), copy=False)
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170 nx.is_isomorphic(K5, G)
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171 G = nx.complete_graph(4)
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172 G = nx.relabel_nodes(G, dict([(i, i - 1) for i in range(4)]), copy=False)
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173 nx.is_isomorphic(K5, G)
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174
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175 def test_relabel_selfloop(self):
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176 G = nx.DiGraph([(1, 1), (1, 2), (2, 3)])
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177 G = nx.relabel_nodes(G, {1: 'One', 2: 'Two', 3: 'Three'}, copy=False)
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178 assert_nodes_equal(G.nodes(), ['One', 'Three', 'Two'])
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179 G = nx.MultiDiGraph([(1, 1), (1, 2), (2, 3)])
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180 G = nx.relabel_nodes(G, {1: 'One', 2: 'Two', 3: 'Three'}, copy=False)
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181 assert_nodes_equal(G.nodes(), ['One', 'Three', 'Two'])
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182 G = nx.MultiDiGraph([(1, 1)])
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183 G = nx.relabel_nodes(G, {1: 0}, copy=False)
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184 assert_nodes_equal(G.nodes(), [0])