xpath - 使用名称空间字典选择子项具有特定attrib值的父项

Question

我需要节点AX_Namensnummer，其中子节点istBestandteilVon具有属性值urn:adv:oid:DEBBAL0600001XOX。

我想使用命名空间字典。

我在迪纳摩工作，与Python 2.7和ElementTree。所以我不能使用lxml！

XML：

<?xml version="1.0" encoding="UTF-8"?> 
<AX_Bestandsdatenauszug 
    xmlns="http://www.adv-online.de/namespaces/adv/gid/6.0" 
    xmlns:adv="http://www.adv-online.de/namespaces/adv/gid/6.0" 
    xmlns:gco="http://www.isotc211.org/2005/gco" 
    xmlns:gmd="http://www.isotc211.org/2005/gmd" 
    xmlns:gml="http://www.opengis.net/gml/3.2" 
    xmlns:ows="http://www.opengis.net/ows" 
    xmlns:wfs="http://www.adv-online.de/namespaces/adv/gid/wfs" 
    xmlns:wfsext="http://www.adv-online.de/namespaces/adv/gid/wfsext" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:xlink="http://www.w3.org/1999/xlink" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:ogc="http://www.adv-online.de/namespaces/adv/gid/ogc" 
    xsi:schemaLocation="http://www.adv-online.de/namespaces/adv/gid/6.0 NAS-Operationen.xsd"> 

    <enthaelt> 
    <gml:featureMember> 
       <AX_Namensnummer gml:id="DEBBAL0600000XUm"> 
        <gml:identifier codeSpace="http://www.adv-online.de/">urn:adv:oid:DEBBAL0600000XUm</gml:identifier> 
        <istBestandteilVon xlink:href="urn:adv:oid:DEBBAL0600000XOX"/> 
        <benennt xlink:href="urn:adv:oid:DEBBAL0600000Y09"/> 
       </AX_Namensnummer> 
       <AX_Namensnummer gml:id="DEBBAL0600001XUm"> 
        <gml:identifier codeSpace="http://www.adv-online.de/">urn:adv:oid:DEBBAL0600001XUm</gml:identifier> 
        <istBestandteilVon xlink:href="urn:adv:oid:DEBBAL0600001XOX"/> 
        <benennt xlink:href="urn:adv:oid:DEBBAL0600000Y08"/> 
       </AX_Namensnummer> 
      </gml:featureMember> 
    </enthaelt> 
</AX_Bestandsdatenauszug> 

代码：

import clr 
import sys 
clr.AddReference('ProtoGeometry') 
from Autodesk.DesignScript.Geometry import * 
sys.path.append("C:\Program Files (x86)\IronPython 2.7\Lib") 
#The inputs to this node will be stored as a list in the IN variables. 

path="file.xml" 
uniStr = unicode(open(path, 'r').read()) 
fixed = uniStr.encode('ascii', 'replace') 
fixed.decode('utf-8', 'replace') 
tree = ET.ElementTree(ET.fromstring(fixed)) 
root = tree.getroot() 

xpath=".//adv:AX_Namensnummer[adv:istBestandteilVon/@xlink:href='urn:adv:oid:DEBBAL0600001XOX']" 

ns = {"":"http://www.adv-online.de/namespaces/adv/gid/6.0", "adv":"http://www.adv-online.de/namespaces/adv/gid/6.0","gco":"http://www.isotc211.org/2005/gco", 
"gmd":"http://www.isotc211.org/2005/gmd","gml":"http://www.opengis.net/gml/3.2","ows":"http://www.opengis.net/ows", 
"wfs":"http://www.adv-online.de/namespaces/adv/gid/wfs","wfsext":"http://www.adv-online.de/namespaces/adv/gid/wfsext","xsd":"http://www.w3.org/2001/XMLSchema", 
"xlink":"http://www.w3.org/1999/xlink","xsi":"http://www.w3.org/2001/XMLSchema-instance","ogc":"http://www.adv-online.de/namespaces/adv/gid/ogc"} 

elem = root.find(xpath,ns) 

print elem 

的xpath：

.//adv:AX_Namensnummer[adv:istBestandteilVon/@xlink:href='urn:adv ：oid：DEBBAL0600001XOX']

错误：

SyntaxError: invalid predicate 

任何想法什么是错的？ Python 2.7和ElementTree可以处理这种xpath吗？

Answer 1

您的XPath，包括谓词，看起来不错。它必须是limitation of ElementTree。

也许尝试一个基本的谓词针对adv:istBestandteilVon，然后让其父（..是parent::*的abbreviated syntax）...

xpath=".//adv:istBestandteilVon[@xlink:href='urn:adv:oid:DEBBAL0600001XOX']/.." 

编辑

只返回adv:AX_Namensnummer ...

xpath=".//adv:AX_Namensnummer/adv:istBestandteilVon[@xlink:href='urn:adv:oid:DEBBAL0600001XOX']/.."