使用Elelment树包在python中解析XML

实际上，我有以下XML文件：

<?xml version="1.0" encoding="UTF-8"?> 
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"> 
        <soapenv:Body> 
                <c:RetriveByVehicleLineModelYearResponse xmlns:a="urn:ford/VehicleOrder/LegacyFeatureMapping/v2.0" xmlns:b="urn:ford/VehicleOrder/SingleOrderEdit/v1.0" xmlns:c="urn:ford/interface/VehicleOrder/LegacyFeatureMapping/v2"> 
                        <c:PortInstalledOptionFeature> 
                                <a:VehicleLineId>13001</a:VehicleLineId> 
                                <a:ModelYear>2014</a:ModelYear> 
                                <a:LegacyColumn>12</a:LegacyColumn> 
                                <a:LegacyValue>178       </a:LegacyValue> 
                                <a:SalesCode>W78</a:SalesCode> 
                                <a:MappingId>41859</a:MappingId> 
                                <a:MappingSeq>0</a:MappingSeq> 
                                <a:MappingDirection>B</a:MappingDirection> 
                                <a:TargetFeature> 
                                        <a:TargetCatgegory> 
                                                <a:Id>181</a:Id> 
                                                <a:Name>LIGHT TRUCK WHEELBASES        </a:Name> 
                                                <a:Type>P</a:Type> 
                                                <a:FamilyCode>AA5</a:FamilyCode> 
                                        </a:TargetCatgegory> 
                                        <a:OrderFeatureId>15615</a:OrderFeatureId> 
                                        <a:WersCode>AA5K8</a:WersCode> 
                                        <a:OrderFeatureName>178 /4521MM WHEELBASE         </a:OrderFeatureName> 
                                        <a:PIO>false</a:PIO> 
                                        <a:SummaryFeature>false</a:SummaryFeature> 
                                </a:TargetFeature> 
                                <a:TargetFeature> 
                                        <a:TargetCatgegory> 
                                                <a:Id>181</a:Id> 
                                                <a:Name>LIGHT TRUCK WHEELBASES        </a:Name> 
                                                <a:Type>P</a:Type> 
                                                <a:FamilyCode>AA5</a:FamilyCode> 
                                        </a:TargetCatgegory> 
                                        <a:OrderFeatureId>15615</a:OrderFeatureId> 
                                        <a:WersCode>AA5K8_second time</a:WersCode> 
                                        <a:OrderFeatureName>178 /4521MM WHEELBASE         </a:OrderFeatureName> 
                                        <a:PIO>false</a:PIO> 
                                        <a:SummaryFeature>false</a:SummaryFeature> 
                                </a:TargetFeature> 
                        </c:PortInstalledOptionFeature> 
                        <c:PortInstalledOptionFeature> 
                                <a:VehicleLineId>13001</a:VehicleLineId> 
                                <a:ModelYear>2014</a:ModelYear> 
                                <a:LegacyColumn>12</a:LegacyColumn> 
                                <a:LegacyValue>190       </a:LegacyValue> 
                                <a:SalesCode>W90</a:SalesCode> 
                                <a:MappingId>41860</a:MappingId> 
                                <a:MappingSeq>0</a:MappingSeq> 
                                <a:MappingDirection>B</a:MappingDirection> 
                                <a:TargetFeature> 
                                        <a:TargetCatgegory> 
                                                <a:Id>181</a:Id> 
                                                <a:Name>LIGHT TRUCK WHEELBASES        </a:Name> 
                                                <a:Type>P</a:Type> 
                                                <a:FamilyCode>AA5</a:FamilyCode> 
                                        </a:TargetCatgegory> 
                                        <a:OrderFeatureId>15616</a:OrderFeatureId> 
                                        <a:WersCode>AA5MA</a:WersCode> 
                                        <a:OrderFeatureName>190 /4826MM WHEELBASE         </a:OrderFeatureName> 
                                        <a:PIO>false</a:PIO> 
                                        <a:SummaryFeature>false</a:SummaryFeature> 
                                </a:TargetFeature> 
                        </c:PortInstalledOptionFeature> 
                </c:RetriveByVehicleLineModelYearResponse> 
        </soapenv:Body> 
</soapenv:Envelope> 

===============为此，我使用了以下代码：

import glob   
import xml.etree.ElementTree as ET 

Fatfile = open('#Var_SOE_VLIS_Response_Output\\Sales_to_Wers_Code2.txt', 'a') 
try: 
   tree = ET.parse('#Var_ENG_Response_Files\\SoapResponse1.xml')     
   Fatfile.write('1111') 
   WersCodeList = tree.findall('./{urn:ford/VehicleOrder/LegacyFeatureMapping/v2.0}PortInstalledOptionFeature') 
   Fatfile.write('\n2222') 
  # x = len(WersCodeList) 
  # Fatfile.write(x) 
   Fatfile.write('\n333') 
   for WersCode in WersCodeList : 
         Fatfile.write('\n444') 
         WersCode = WersCode.find('.//{urn:ford/VehicleOrder/LegacyFeatureMapping/v2.0}WersCode') 
         Fatfile.write('\n') 
         Fatfile.write(WersCode.text) 
except : 
    Fatfile.write(' \nsorry') 
Fatfile.write(' \nSuccess') 

====

但我无法使用Findall获取WersCode列表

---

在这方面请帮忙。。我挣扎了一周先生

尝试使用

lxml

。它比

ElementTree

更简单、更快。停止犹豫，读这篇文章到另一个问题。使用搜索词“元素树python findall namespace xml”查找它是很简单的，但是当您的嫌疑犯没有处理名称空间时，您很容易迷失方向

使用适当的名称空间处理，代码也变得非常简单和清晰：

import xml.etree.ElementTree as ET
namespaces = {
    "a" : "urn:ford/VehicleOrder/LegacyFeatureMapping/v2.0",
    "b" : "urn:ford/VehicleOrder/SingleOrderEdit/v1.0",
    "c" : "urn:ford/interface/VehicleOrder/LegacyFeatureMapping/v2"
}
tree = ET.parse('wers.xml')
#print("input file found")
piof_list = tree.findall('.//c:PortInstalledOptionFeature', namespaces)
#print("{0:d} PIOFs found".format(len(piof_list)))
for piof in piof_list:
    #print(piof)
    wers_code = piof.find('.//a:WersCode', namespaces)
    print(wers_code.text)

看看这个：

import xml.etree.ElementTree as ET
namespaces = {
    "a" : "urn:ford/VehicleOrder/LegacyFeatureMapping/v2.0",
    "b" : "urn:ford/VehicleOrder/SingleOrderEdit/v1.0",
    "c" : "urn:ford/interface/VehicleOrder/LegacyFeatureMapping/v2"
}
tree = ET.parse('wers.xml')
#print("input file found")
piof_list = tree.findall('.//c:PortInstalledOptionFeature', namespaces)
#print("{0:d} PIOFs found".format(len(piof_list)))
for piof in piof_list:
    #print(piof)
    wers_code = piof.find('.//a:WersCode', namespaces)
    print(wers_code.text)