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python - lxml - 具有多个命名空间的 XML 文档

转载 作者:太空宇宙 更新时间:2023-11-03 17:58:44 24 4
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是否可以使用 lxml 构造一个像这样的 XML?

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns0="http://xmlns.CLT.com/consume/ENTBUS" xmlns:ns1="http://xmlns.CLT.com/Core/ENTBUS" xmlns:ns2="http://xmlns.CLT.com/output/EBO">
<soapenv:Header/>
<soapenv:Body>
<ns0:ConsumptionRequestENTBUS>
<ns1:ENTBUSHeader>
<ns1:ENTBUSID>1</ns1:ENTBUSID>
</ns1:ENTBUSHeader>
<ns0:Zone>
<ns2:Consumption>
<ns2:BusCode>1</ns2:BusCode>
</ns2:Consumption>
</ns0:Zone>
</ns0:ConsumptionRequestENTBUS>
</soapenv:Body>
</soapenv:Envelope>

我尝试按如下方式构建根元素,但失败了。并且几乎每个元素都需要引用命名空间。

>>> from lxml import etree
>>> root = etree.Element("soapenv:Envelope")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "lxml.etree.pyx", line 2811, in lxml.etree.Element (src\lxml\lxml.etree.c:65389)
File "apihelpers.pxi", line 103, in lxml.etree._makeElement (src\lxml\lxml.etree.c:13898)
File "apihelpers.pxi", line 1575, in lxml.etree._tagValidOrRaise (src\lxml\lxml.etree.c:27955)
ValueError: Invalid tag name u'soapenv:Envelope'

谢谢

最佳答案

我能够通过以下方式解决这个问题。欢迎提出任何改进建议。

>>> from lxml import etree
>>> SOAPENV_NAMESPACE = "http://schemas.xmlsoap.org/soap/envelope"
>>> SOAPENV = "{%s}" % SOAPENV_NAMESPACE
>>> ns0_NAMESPACE = "http://xmlns.CLT.com/consume/ENTBUS"
>>> ns0 = "{%s}" % ns0_NAMESPACE
>>> ns1_NAMESPACE = "http://xmlns.CLT.com/Core/ENTBUS"
>>> ns1 = "{%s}" % ns1_NAMESPACE
>>> ns2_NAMESPACE = "http://xmlns.CLT.com/output/EBO"
>>> ns2 = "{%s}" % ns2_NAMESPACE
>>> NSMAP = {'SoapEnv' : SOAPENV_NAMESPACE,'ns0':ns0_NAMESPACE,'ns1':ns1_NAMESPACE,'ns2':ns2_NAMESPACE}
>>> envelope = etree.Element(SOAPENV + "Envelope", nsmap=NSMAP)
>>> ConsumptionRequestENTBUS=etree.SubElement(envelope, ns0 + "ConsumptionRequestENTBUS", nsmap=NSMAP)
>>> ENTBUS=etree.SubElement(ConsumptionRequestENTBUS, ns1 + "ENTBUS", nsmap=NSMAP)
>>> ENTBUSHeader=etree.SubElement(ENTBUS, ns1 + "ENTBUSHeader", nsmap=NSMAP)
>>> ENTBUSDetail=etree.SubElement(ENTBUSHeader, ns2 + "ENTBUSDetail", nsmap=NSMAP)
>>> print(etree.tostring(envelope, pretty_print=True))
<SoapEnv:Envelope xmlns:ns0="http://xmlns.CLT.com/consume/ENTBUS" xmlns:ns1="http://xmlns.CLT.com/Core/ENTBUS" xmlns:ns2="h
ttp://xmlns.CLT.com/output/EBO" xmlns:SoapEnv="http://schemas.xmlsoap.org/soap/envelope">
<ns0:ConsumptionRequestENTBUS>
<ns1:ENTBUS>
<ns1:ENTBUSHeader>
<ns2:ENTBUSDetail/>
</ns1:ENTBUSHeader>
</ns1:ENTBUS>
</ns0:ConsumptionRequestENTBUS>
</SoapEnv:Envelope>

关于python - lxml - 具有多个命名空间的 XML 文档,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28054444/

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