如何在xml标记中去除所有子标记,但是在python中使用lxml将文本合并到parens中？

pip install lxml

from lxml import etree

# 示例XML文档
xml_string = '''
<root>
  <parens>
   <child1>text1</child1>
   <child2>text2</child2>
   <child3>text3</child3>
  </parens>
</root>
'''

# 解析XML文档
root = etree.fromstring(xml_string)

# 查找<parens>标记
parens = root.find('.//parens')

# 去除所有子标记
for child in parens:
    parens.remove(child)

# 将文本合并到<parens>标记中
parens.text = ' '.join(parens.itertext())

# 将修改后的XML文档转换为字符串
new_xml_string = etree.tostring(root, pretty_print=True)

print(new_xml_string.decode())

<root>
  <parens>text1 text2 text3</parens>
</root>