如何使用BeautifulSoup创建包含子级的xml树

from bs4 import BeautifulSoup

# 创建XML树的根节点
xml = BeautifulSoup(features="xml")

# 创建子节点
parent = xml.new_tag("parent")
xml.append(parent)

child1 = xml.new_tag("child1")
parent.append(child1)

child2 = xml.new_tag("child2")
parent.append(child2)

# 添加子节点的内容
child1.string = "This is child1"
child2.string = "This is child2"

# 打印XML树
print(xml.prettify())

<?xml version="1.0" encoding="utf-8"?>
<parent>
 <child1>This is child1</child1>
 <child2>This is child2</child2>
</parent>