删除xml中的特定节点

<book>
   <title>My Book</title>
   <chapter>
      <title>Chapter 1</title>
      <section>
         <title>Section 1</title>
      </section>
   </chapter>
   <chapter>
      <title>Chapter 2</title>
      <section>
         <title>Section 2</title>
         <subsection>
            <title>Subsection 2.1</title>
         </subsection>
         <subsection>
            <title>Subsection 2.2</title>
         </subsection>
      </section>
   </chapter>
</book>

import xml.etree.ElementTree as ET

# parse XML document
tree = ET.parse('document.xml')

# find and remove the specific section node
for section in tree.findall('.//chapter/section'):
    subsection_nodes = section.findall('.//subsection')
    if subsection_nodes:
        section.remove(section.find('.//subsection'))

# save updated XML document
tree.write('document.xml')