如何使用networkx删除子图的最后一条边

import networkx as nx

G = nx.Graph()  # 创建无向图
G = nx.DiGraph()  # 创建有向图

G.add_nodes_from([1, 2, 3, 4])  # 添加节点
G.add_edges_from([(1, 2), (2, 3), (3, 4)])  # 添加边

subgraph = G.subgraph(nodes)  # nodes为子图中的节点列表

last_edge = list(subgraph.edges())[-1]  # 获取子图的最后一条边
G.remove_edge(*last_edge)  # 删除最后一条边

import networkx as nx

G = nx.Graph()
G.add_nodes_from([1, 2, 3, 4])
G.add_edges_from([(1, 2), (2, 3), (3, 4)])

subgraph = G.subgraph([2, 3, 4])
last_edge = list(subgraph.edges())[-1]
G.remove_edge(*last_edge)