如何在从NetworkX写入GraphML时指定<key> id？

import networkx as nx

G = nx.Graph()  # 创建一个无向图对象

G.add_node(1)  # 添加节点1
G.add_node(2)  # 添加节点2
G.add_edge(1, 2)  # 添加节点1和节点2之间的边

nx.set_node_attributes(G, {1: {'id': 'node1'}, 2: {'id': 'node2'}})  # 为节点添加属性，其中'id'为<key> id
nx.set_edge_attributes(G, {(1, 2): {'id': 'edge1'}})  # 为边添加属性，其中'id'为<key> id

nx.write_graphml(G, 'graph.graphml', infer_numeric_types=True, prettyprint=True, encoding='utf-8', preamble='<?xml version="1.0" encoding="UTF-8"?>\n<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">\n  <key id="id" for="node" attr.name="id" attr.type="string" />\n  <key id="id" for="edge" attr.name="id" attr.type="string" />\n</graphml>')