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annotate planemo/lib/python3.7/site-packages/networkx/classes/ordered.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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2 Consistently ordered variants of the default base classes.
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3 Note that if you are using Python 3.6+, you shouldn't need these classes
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4 because the dicts in Python 3.6+ are ordered.
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5 Note also that there are many differing expectations for the word "ordered"
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6 and that these classes may not provide the order you expect.
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7 The intent here is to give a consistent order not a particular order.
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8
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9 The Ordered (Di/Multi/MultiDi) Graphs give a consistent order for reporting of
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10 nodes and edges. The order of node reporting agrees with node adding, but for
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11 edges, the order is not necessarily the order that the edges were added.
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12
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13 In general, you should use the default (i.e., unordered) graph classes.
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14 However, there are times (e.g., when testing) when you may need the
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15 order preserved.
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16
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17 Special care is required when using subgraphs of the Ordered classes.
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18 The order of nodes in the subclass is not necessarily the same order
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19 as the original class. In general it is probably better to avoid using
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20 subgraphs and replace with code similar to:
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21
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22 .. code-block:: python
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23
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24 # instead of SG = G.subgraph(ordered_nodes)
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25 SG=nx.OrderedGraph()
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26 SG.add_nodes_from(ordered_nodes)
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27 SG.add_edges_from((u, v) for (u, v) in G.edges() if u in SG if v in SG)
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28
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29 """
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30 from collections import OrderedDict
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31
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32 from .graph import Graph
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33 from .multigraph import MultiGraph
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34 from .digraph import DiGraph
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35 from .multidigraph import MultiDiGraph
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36
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37 __all__ = []
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38
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39 __all__.extend([
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40 'OrderedGraph',
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41 'OrderedDiGraph',
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42 'OrderedMultiGraph',
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43 'OrderedMultiDiGraph',
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44 ])
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45
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46
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47 class OrderedGraph(Graph):
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48 """Consistently ordered variant of :class:`~networkx.Graph`."""
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49 node_dict_factory = OrderedDict
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50 adjlist_outer_dict_factory = OrderedDict
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51 adjlist_inner_dict_factory = OrderedDict
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52 edge_attr_dict_factory = OrderedDict
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53
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54
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55 class OrderedDiGraph(DiGraph):
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56 """Consistently ordered variant of :class:`~networkx.DiGraph`."""
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57 node_dict_factory = OrderedDict
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58 adjlist_outer_dict_factory = OrderedDict
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59 adjlist_inner_dict_factory = OrderedDict
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60 edge_attr_dict_factory = OrderedDict
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61
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62
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63 class OrderedMultiGraph(MultiGraph):
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64 """Consistently ordered variant of :class:`~networkx.MultiGraph`."""
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65 node_dict_factory = OrderedDict
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66 adjlist_outer_dict_factory = OrderedDict
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67 adjlist_inner_dict_factory = OrderedDict
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68 edge_key_dict_factory = OrderedDict
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69 edge_attr_dict_factory = OrderedDict
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70
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71
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72 class OrderedMultiDiGraph(MultiDiGraph):
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73 """Consistently ordered variant of :class:`~networkx.MultiDiGraph`."""
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74 node_dict_factory = OrderedDict
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75 adjlist_outer_dict_factory = OrderedDict
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76 adjlist_inner_dict_factory = OrderedDict
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77 edge_key_dict_factory = OrderedDict
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78 edge_attr_dict_factory = OrderedDict