def map_ends_to_edge(self):
''' Creates a dictionary that maps a tuple containing the end points of an edge to the corresponding edge. '''
self.nodes_edges = {}
for edge in self.edge_list:
ends = edge.start, edge.end
self.nodes_edges[ends] = edge
reverse_ends = edge.end, edge.start
reverse_edge = Edge()
reverse_edge.start = edge.end
reverse_edge.end = edge.start
reverse_edge.add_multiple_nodes(edge.node_list[::-1])
reverse_edge.update_distance()
self.nodes_edges[reverse_ends] = reverse_edge
def vertices_of(self, e: Edge) -> Tuple[Node, Node]:
""
return (e.start(), e.end())
