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16 lines
380 B
Python
16 lines
380 B
Python
from .graph import Graph
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def build_graph(sequence):
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graph = Graph()
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for item in sequence:
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if not graph.has_node(item):
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graph.add_node(item)
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return graph
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def remove_unreachable_nodes(graph):
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for node in graph.nodes():
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if sum(graph.edge_weight((node, other)) for other in graph.neighbors(node)) == 0:
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graph.del_node(node)
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