Python两次追加XML SubElement

Question

我编写了以下代码以附加XML SubElement，但它两次附加了相同的代码：Python代码：from xml.etree import ElementTree as ETtree = ET.parse("sample.xml")root = tree.getroot()child = parent = ''NOTFOUND = 0pos = 0for user in root:    Id = user.get("id")    if Id == '012345':        for attr in user:            attr_name = attr.get('name')            pos = len(user)            if attr_name != "attrib3" and NOTFOUND != 1:                print "#1: ", user.get('id'), attr.get('name')                NOTFOUND = NOTFOUND + 1                parent = user                child = attr                continueif NOTFOUND == 1:    newattr = ET.SubElement(parent,'res',attrib={'name':'attrib3'})    newattr_first_seem = ET.SubElement(newattr, 'first_seem', attrib={'date':'2018-08-01', 'status':'GRANTED'})    print "#2: ", newattr.attrib    parent.append(newattr)tree.write('sample.xml')所需的输出：<stop>    <user id="012345">        <res name="attrib1">            <first_seem date="2018-07-31" status="REQUESTED" />            <last_seem date="2018-07-31" status="INPROCESS" />        </res>        <res name="attrib2">            <first_seem date="2018-07-31" status="REQUESTED" />            <last_seem date="2018-07-31" status="COMPLETED" />        </res>        **<res name="attrib3">            <first_seem date="2018-08-01" status="GRANTED" />        </res>**            </user>    <user id="123456">        <res name="attrib1">            <first_seem date="2018-07-31" status="REQUESTED" />            <last_seem date="2018-07-31" status="REQUESTED" />        </res>    </user></stop>有人可以帮我弄清楚为什么新的SubElement被记录两次吗？我将打印和数学控件放入if中，以确保它不会循环两次（并且也没有循环）。

Answer 1

用 ET.dump(newattr)

前任：

from xml.etree import ElementTree as ET

tree = ET.parse(filename)

root = tree.getroot()

parent = ''

NOTFOUND = False

for user in root:

    Id = user.get("id")

    if Id == '012345':

        if "attrib3" not in [attr.get('name') for attr in user]:  

            print user, "----"          

            NOTFOUND = True

            parent = user

if NOTFOUND:

    newattr = ET.SubElement(parent,'res',attrib={'name':'attrib3'})

    newattr_first_seem = ET.SubElement(newattr, 'first_seem', attrib={'date':'2018-08-01', 'status':'GRANTED'})

    print "#2: ", newattr.attrib

    ET.dump(newattr)    #Update!!!!

tree.write(filename)