如何在python中使用节点和边在图形中绘制形状？

pip install matplotlib

import matplotlib.pyplot as plt
import networkx as nx

G = nx.Graph()  # 创建一个无向图形对象

# 添加节点
G.add_node("A")
G.add_node("B")
G.add_node("C")

# 添加边
G.add_edge("A", "B")
G.add_edge("B", "C")
G.add_edge("C", "A")

# 绘制图形
pos = nx.spring_layout(G)  # 定义节点的布局
nx.draw_networkx_nodes(G, pos)  # 绘制节点
nx.draw_networkx_edges(G, pos)  # 绘制边

# 添加标签
labels = {"A": "Node A", "B": "Node B", "C": "Node C"}
nx.draw_networkx_labels(G, pos, labels)

# 显示图形
plt.axis("off")  # 关闭坐标轴
plt.show()