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我有一个如下的 XML 输出：

<?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><ns1:getValuesResponse soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://soap.core.green.controlj.com"><getValuesReturn soapenc:arrayType="xsd:string[3]" xsi:type="soapenc:Array" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"><getValuesReturn xsi:type="xsd:string">337.81998</getValuesReturn><getValuesReturn xsi:type="xsd:string">129.1</getValuesReturn><getValuesReturn xsi:type="xsd:string">1152.9691</getValuesReturn></getValuesReturn></ns1:getValuesResponse></soapenv:Body></soapenv:Envelope>

我想获取有关“getValuesReturn”属性的所有值作为 Python 列表。为此，我使用了如下代码：

import libxml2

DOC="""<?xml version="1.0" encoding="utf-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><ns1:getValuesResponse soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://soap.core.green.controlj.com"><getValuesReturn soapenc:arrayType="xsd:string[3]" xsi:type="soapenc:Array" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"><getValuesReturn xsi:type="xsd:string">337.81998</getValuesReturn><getValuesReturn xsi:type="xsd:string">129.1</getValuesReturn><getValuesReturn xsi:type="xsd:string">1152.9691</getValuesReturn></getValuesReturn></ns1:getValuesResponse></soapenv:Body></soapenv:Envelope>"""

def getValues(cat):
    return [attr.content for attr in doc.xpathEval("/elements/parent[@name='%s']/child/@value" % (cat))]

# gelen xml dosyasini yazdir
doc = libxml2.parseDoc(DOC)

#getValuesReturn etiketinin degerlerini yazdir
print getValues("getValuesReturn")

它只是给我一个空列表。但我应该得到一个列表，例如 ["337.81998","129.1","1152.9691"]。你能帮我解决这个问题吗？

提前致谢。

4

1 回答 1

1

xpath 表达式从何而来？它不匹配任何东西。（没有elements,parent标签元素）

尝试以下操作：

DOC = ...
doc = libxml2.parseDoc(DOC)
print [attr.content for attr in doc.xpathEval(".//getValuesReturn")]

印刷

['337.81998129.11152.9691', '337.81998', '129.1', '1152.9691']

doc = libxml2.parseDoc(DOC)
print [attr.content for attr in doc.xpathEval('.//getValuesReturn/text()')]

印刷

['337.81998', '129.1', '1152.9691']
于 2013-09-06T08:30:28.707 回答