用python编辑XML

Question

我正在尝试解析一个xml文件，在这里我希望获取objlocation的字符串并更改该字符串的内容。

以下是我所拥有的xml文件的内容：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<publish show="STATE">

    <pubgroup objtype="ELE" location="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.xml">

        <member objidx="15283942" objlabel="anm" objlocation="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.anm"/>

        <member objidx="15283952" objlabel="fbx" objlocation="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001_M_WALK_None.fbx"/>

        <member objidx="15283962" objlabel="mov" objlocation="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.mov"/>

        <member objidx="15283972" objlabel="libraryinfo" objlocation="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.json"/>

        <member objidx="15283982" objlabel="thumbnail" objlocation="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.mng"/>

    </pubgroup>
</publish>

我尝试了.firstChild或.childNodes[]，它将输出的内容作为我的xml文件。这是我试图解析的xml文件列表，它的格式大致相同。

我正试着做这件事，这是节奏曲。

Answer 1

您可以使用xml轻松地修改ElementTree API文件。

from xml.etree.ElementTree import parse
doc = parse('data.xml')
root = doc.getroot()
for t in root.iterfind('pubgroup/member'):
    t.attrib['objlocation'] = "spam"

doc.write('output.xml', xml_declaration=True)

iterfind方法返回一个generator函数，而不是list，如果您的xml文件很大，则非常方便。

输出

<?xml version='1.0' encoding='us-ascii'?>
<publish show="STATE">

    <pubgroup location="/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.xml" objtype="ELE">

        <member objidx="15283942" objlabel="anm" objlocation="spam" />

        <member objidx="15283952" objlabel="fbx" objlocation="spam" />

        <member objidx="15283962" objlabel="mov" objlocation="spam" />

        <member objidx="15283972" objlabel="libraryinfo" objlocation="spam" />

    <member objidx="15283982" objlabel="thumbnail" objlocation="spam" />

</pubgroup>

​

这里，spam是objlocation的新值。

Answer 2

我能建议的最短代码：

from xml.etree.ElementTree import ElementTree
tree = ElementTree()
root = tree.parse('test.txt') # root represents <publish> tag

for member in root.findall('pubgroup/member'):
    print member.attrib['objlocation']

输出：

/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.anm
/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001_M_WALK_None.fbx
/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.mov
/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.json
/user_data/STATE/ITEM/character/ANM/ANM_rig_WALK_sg_v001/ANM_rig_WALK_sg_v001.mng

改变：

for member in root.findall('pubgroup/member'):
    member.attrib['objlocation'] = 'changed'
tree.write('output.txt')