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alex
Asked:2022-08-21 14:21:21 +0000 UTC2022-08-21 14:21:21 +0000 UTC

在 XML (etree find) 中找不到节点。描述调用查找的正确方法是什么？

  • 772

有一个xml文件

<ns:Documents
  xmlns:ns="http://fsrar.ru/WEGAIS/WB_DOC_SINGLE_01"
  xmlns:wb="http://fsrar.ru/WEGAIS/TTNSingle_v4">
  <ns:Document>
    <ns:WayBill_v4>
      <wb:Header>
        <wb:Shipper>
        </wb:Shipper>
        <wb:Consignee>
        </wb:Consignee>
      </wb:Header>
    </ns:WayBill_v4>
  </ns:Document>
</ns:Documents>

我需要找一个收货人节点，或者Consignee

写了这段代码

import xml.etree.cElementTree as et
tree = et.parse( "WayBill.xml" )
root = tree.getroot()
wb_Consignee = root.find( 'wb:Consignee' )
print( wb_Consignee )                          # None
Consignee = root.find( 'Consignee' )
print( Consignee )                             # None

告诉我出了什么事？

python xml

2 个回答

  1. @splash58 建议在哪里挖掘。感谢他。2-3小时的训练，一切都变好了

    这是结果

    from lxml import etree
tree = etree.parse( "WayBill.xml" )
root = tree.getroot() # Documents
ns = root.nsmap
doc = root.find( "ns:Document", ns ) 
wb = doc.find( "ns:WayBill_v4", ns ) 
head = wb.find( "wb:Header", ns ) 
consignee = head.find( "wb:Consignee", ns ) 

print( consignee )
    • 1
  2. Best Answer

    更短的版本，使用 XPath

    from lxml import etree
tree = etree.parse( "WayBill.xml" )
root = tree.getroot() # Documents
ns = root.nsmap
consignee = root.find( './/wb:Consignee', ns )

#  .// означает поиск по всему документу, а не только по детям 

print( consignee )
    • 0

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