从python中的ElementTree中删除空白的lxml元素

from xml.etree import ElementTree as ET
from lxml import etree

tree = ET.parse('example.xml')
root = tree.getroot()

<root>
    <element1>Text 1</element1>
    <element2></element2>
    <element3>Text 3</element3>
    <element4>   </element4>
</root>

for element in root:
    if element.text and element.text.strip() == '':
        root.remove(element)

tree.write('modified.xml')

from xml.etree import ElementTree as ET
from lxml import etree

tree = ET.parse('example.xml')
root = tree.getroot()

for element in root:
    if element.text and element.text.strip() == '':
        root.remove(element)

tree.write('modified.xml')