如何在python networkx中更改标签大小

import networkx as nx
import matplotlib.pyplot as plt

G = nx.Graph()

G.add_node(1)
G.add_node(2)
G.add_edge(1, 2)

node_labels = {1: 'Node 1', 2: 'Node 2'}
node_sizes = {1: 200, 2: 300}  # 定义节点标签的大小

pos = nx.spring_layout(G)  # 定义节点的布局
nx.draw_networkx_nodes(G, pos, node_size=list(node_sizes.values()))
nx.draw_networkx_edges(G, pos)
nx.draw_networkx_labels(G, pos, labels=node_labels, font_size=12)  # 设置节点标签的大小
plt.axis('off')
plt.show()