Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/classes/ordered.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 """ |
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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", "OrderedDiGraph", "OrderedMultiGraph", "OrderedMultiDiGraph"] |
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41 ) |
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42 |
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43 |
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44 class OrderedGraph(Graph): |
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45 """Consistently ordered variant of :class:`~networkx.Graph`.""" |
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46 |
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47 node_dict_factory = OrderedDict |
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48 adjlist_outer_dict_factory = OrderedDict |
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49 adjlist_inner_dict_factory = OrderedDict |
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50 edge_attr_dict_factory = OrderedDict |
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51 |
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52 |
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53 class OrderedDiGraph(DiGraph): |
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54 """Consistently ordered variant of :class:`~networkx.DiGraph`.""" |
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55 |
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56 node_dict_factory = OrderedDict |
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57 adjlist_outer_dict_factory = OrderedDict |
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58 adjlist_inner_dict_factory = OrderedDict |
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59 edge_attr_dict_factory = OrderedDict |
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60 |
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61 |
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62 class OrderedMultiGraph(MultiGraph): |
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63 """Consistently ordered variant of :class:`~networkx.MultiGraph`.""" |
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64 |
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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 |
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75 node_dict_factory = OrderedDict |
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76 adjlist_outer_dict_factory = OrderedDict |
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77 adjlist_inner_dict_factory = OrderedDict |
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78 edge_key_dict_factory = OrderedDict |
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79 edge_attr_dict_factory = OrderedDict |