创建带缩进的XML

 from xml.etree import ElementTree as ET
 from xml.dom import minidom

 root = ET.Element('root',{'age':''})

 son=ET.SubElement(root,'root',{'age':''})
 ET.SubElement(son,'haha',{'bb':'fhfhf'})

 # tree = ET.ElementTree(root)
 # tree.write('aha.xml')

 def mywrite(root,file_path):
     rough_str = ET.tostring(root,'utf-8')
     reparsed = minidom.parseString(rough_str)
     new_str = reparsed.toprettyxml(indent='\t')
     f = open(file_path,'w',encoding='utf-8')
     f.write(new_str)
     f.close()

 mywrite(root,'nnnn.xml')

结果

<?xml version="1.0" ?>
<root age="18">
   <root age="18">
      <haha bb="fhfhf"/>
   </root>
</root>