如何在Python3中从类似文件的xml对象中查找节点？

import xml.etree.ElementTree as ET

xml_str = '''
<root>
    <node1>
        <subnode1>Value 1</subnode1>
    </node1>
    <node2>
        <subnode2>Value 2</subnode2>
    </node2>
</root>
'''

xml_obj = ET.fromstring(xml_str)

node1 = xml_obj.find('node1')

subnodes = xml_obj.findall('.//subnode2')

value = node1.find('subnode1').text

import xml.etree.ElementTree as ET

xml_str = '''
<root>
    <node1>
        <subnode1>Value 1</subnode1>
    </node1>
    <node2>
        <subnode2>Value 2</subnode2>
    </node2>
</root>
'''

xml_obj = ET.fromstring(xml_str)

node1 = xml_obj.find('node1')
subnodes = xml_obj.findall('.//subnode2')

value = node1.find('subnode1').text

print(value)  # 输出：Value 1