如何在Networkx中从边列表创建加权有向图

import networkx as nx

# 创建边列表
edges = [
    ('A', 'B', 5),
    ('B', 'C', 3),
    ('C', 'D', 2),
    ('D', 'A', 1)
]

# 创建加权有向图
G = nx.DiGraph()

# 添加边到图中
for edge in edges:
    source, target, weight = edge
    G.add_edge(source, target, weight=weight)

# 打印图的节点和边
print("节点：", G.nodes())
print("边：", G.edges())

# 打印边的权重
for edge in G.edges(data=True):
    source, target, data = edge
    print(f"边 ({source} -> {target}) 的权重为：{data['weight']}")