我想用lxml
包创建以下XML:
<configuration xmlns:cond="http://www.aaa.com/orc/condition" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../schema/variation-config.xsd">
<strategy id="XXX">
<conditions>
<cond:scenario>A</cond:scenario>
</conditions>
</strategy>
</configuration>
到目前为止,我有以下代码,这根本不能令人满意:
XHTML_NAMESPACE = "http://www.aaa.com/orc/condition"
XHTML = "{%s}" % XHTML_NAMESPACE
NSMAP = {
'cond' : XHTML_NAMESPACE,
'xsi': 'http://www.w3.org/2001/XMLSchema-instance'
}
root = etree.Element(
"configuration",
nsmap=NSMAP,
)
strategy = etree.SubElement(root, "strategy", id="XXX")
conditions = etree.SubElement(strategy, "conditions")
cond1 = etree.SubElement(conditions, XHTML + "scenario", nsmap=NSMAP)
cond1.text = "A"
它给我的是:
<configuration xmlns:cond="http://www.aaa.com/orc/condition" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<strategy id="XXX">
<conditions>
<cond:scenario>A</cond:scenario>
</conditions>
</strategy>
</configuration>
问题:
我只是想念xsi:noNamespaceSchemaLocation="../schema/variation-config.xsd"
。您知道如何将其添加到XML吗?
用更好的解决方案更新问题后,我认为您缺少为现有元素设置属性的方法。使用set
方法:
root.set(XSI + "noNamespaceSchemaLocation", "../schema/variation-config.xsd")
[此外,当您向已经知道nsmap
中定义的名称空间的元素添加子元素时,就无需再次包含nsmap
。换句话说,代替
cond1 = etree.SubElement(conditions, XHTML + "scenario", nsmap=NSMAP)
您可以写
cond1 = etree.SubElement(conditions, XHTML + "scenario")
最后,XHTML
是一个不幸的变量名,因为XHTML是标准名称空间。
产生正确结果的解决方案
from lxml import etree
COND_NAMESPACE = "http://www.aaa.com/orc/condition"
XSI_NAMESPACE = "http://www.w3.org/2001/XMLSchema-instance"
COND = "{%s}" % COND_NAMESPACE
XSI = "{%s}" % XSI_NAMESPACE
nsmap = {"cond": "http://www.aaa.com/orc/condition", "xsi": "http://www.w3.org/2001/XMLSchema-instance"}
root = etree.Element("configuration", nsmap=nsmap)
root.set(XSI + "noNamespaceSchemaLocation", "../schema/variation-config.xsd")
strategy = etree.SubElement(root, "strategy", id="XXX")
conditions = etree.SubElement(strategy, "conditions")
scenario = etree.SubElement(conditions, COND + "scenario")
scenario.text = "A"
print(etree.tostring(root, pretty_print=True))
输出
<configuration xmlns:cond="http://www.aaa.com/orc/condition" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../schema/variation-config.xsd">
<strategy id="XXX">
<conditions>
<cond:scenario>A</cond:scenario>
</conditions>
</strategy>
</configuration>