XML etree子级中find方法的Keyerror

我创建了一个简单的xml结构:

import xml.etree.cElementTree as ET
root = ET.Element("root")
doc = ET.SubElement(root, "doc", name="doc1")

ET.SubElement(doc, "rank").text = "Employee"
ET.SubElement(doc, "skill").text = "nothing"

现在我想返回值,但我得到一个错误:“KeyError:'Employee'”

for doc in root.findall('doc'):
    rank = doc.find('rank').text
    skill = doc.find('skill').text
    name = doc.get('name')
    Logging(name, rank, skill)