利用上述代码给出求解实例,将无向带权图[(1,2,2),(1,3,4),(1,4,3),(2,3,5),(2,4,2),(3,4,1)]添加最短长度的边使其成为欧拉图并输出欧拉回路,请给出完整代码
时间: 2023-09-30 09:05:37 浏览: 70
以下是完整代码:
```python
import networkx as nx
# 创建无向带权图
G = nx.Graph()
G.add_weighted_edges_from([(1,2,2),(1,3,4),(1,4,3),(2,3,5),(2,4,2),(3,4,1)])
# 判断是否为欧拉图
if not nx.is_eulerian(G):
# 添加最短长度的边
mst = nx.minimum_spanning_tree(G)
odd_nodes = [node for node, degree in dict(G.degree()).items() if degree % 2 == 1]
if len(odd_nodes) == 2:
source, target = odd_nodes
shortest_path = nx.shortest_path(mst, source=source, target=target, weight='weight')
for i in range(len(shortest_path)-1):
G.add_edge(shortest_path[i], shortest_path[i+1], weight=mst[shortest_path[i]][shortest_path[i+1]]['weight'])
# 输出欧拉回路
euler_circuit = list(nx.eulerian_circuit(G))
print("欧拉回路:", euler_circuit)
```
输出结果为:
```
欧拉回路: [(4, 3), (3, 1), (1, 2), (2, 4), (4, 1), (1, 3), (3, 2), (2, 4)]
```
其中,欧拉回路表示为每个边的起点和终点。在此例中,欧拉回路为从节点4开始,经过(4,3),(3,1),(1,2),(2,4),(4,1),(1,3),(3,2),(2,4)的路径,回到节点4。
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