Python:使用lxml添加xml架构属性 [英] Python: adding xml schema attributes with lxml
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问题描述
我编写了一个脚本,该脚本以xml格式打印出当前目录中的所有.xml文件,但是我不知道如何将xmlns属性添加到顶级标签. 我想得到的输出是:
I've written a script that prints out all the .xml files in the current directory in xml format, but I can't figure out how to add the xmlns attributes to the top-level tag. The output I want to get is:
<?xml version='1.0' encoding='utf-8'?>
<databaseChangeLog
xmlns="http://www.host.org/xml/ns/dbchangelog"
xmlns:xsi="http://www.host.org/2001/XMLSchema-instance"
xsi:schemaLocation="www.host.org/xml/ns/dbchangelog">
<include file="cats.xml"/>
<include file="dogs.xml"/>
<include file="fish.xml"/>
<include file="meerkats.xml"/>
</databaseChangLog>
但是,这是我得到的输出:
However, here is the output I am getting:
<?xml version='1.0' encoding='utf-8'?>
<databaseChangeLog>
<include file="cats.xml"/>
<include file="dogs.xml"/>
<include file="fish.xml"/>
<include file="meerkats.xml"/>
</databaseChangLog>
这是我的剧本:
import lxml.etree
import lxml.builder
import glob
E = lxml.builder.ElementMaker()
ROOT = E.databaseChangeLog
DOC = E.include
# grab all the xml files
files = [DOC(file=f) for f in glob.glob("*.xml")]
the_doc = ROOT(*files)
str = lxml.etree.tostring(the_doc, pretty_print=True, xml_declaration=True, encoding='utf-8')
print str
我在网上找到了一些明确设置名称空间属性的示例,此处和此处,但要老实说,当我刚开始时,他们对我有些不满.还有另一种方法可以将这些xmlns属性添加到databaseChangeLog标记中吗?
I've found some examples online of explicitly setting namespace attributes, here and here, but to be honest they went a little over my head as I am just starting out. Is there another way to add these xmlns attributes to the databaseChangeLog tag?
推荐答案
import lxml.etree as ET
import lxml.builder
import glob
dbchangelog = 'http://www.host.org/xml/ns/dbchangelog'
xsi = 'http://www.host.org/2001/XMLSchema-instance'
E = lxml.builder.ElementMaker(
nsmap={
None: dbchangelog,
'xsi': xsi})
ROOT = E.databaseChangeLog
DOC = E.include
# grab all the xml files
files = [DOC(file=f) for f in glob.glob("*.xml")]
the_doc = ROOT(*files)
the_doc.attrib['{{{pre}}}schemaLocation'.format(pre=xsi)] = 'www.host.org/xml/ns/dbchangelog'
print(ET.tostring(the_doc,
pretty_print=True, xml_declaration=True, encoding='utf-8'))
收益
<?xml version='1.0' encoding='utf-8'?>
<databaseChangeLog xmlns:xsi="http://www.host.org/2001/XMLSchema-instance" xmlns="http://www.host.org/xml/ns/dbchangelog" xsi:schemaLocation="www.host.org/xml/ns/dbchangelog">
<include file="test.xml"/>
</databaseChangeLog>
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