如何将名称空间从lxml树中剥离? [英] How can I strip namespaces out of an lxml tree?

问题描述

接着使用python删除XML中的子元素. ..

感谢@Tichodroma，我有以下代码:

Thanks to @Tichodroma, I have this code:

如果您可以使用 lxml ，请尝试以下操作:

If you can use lxml, try this:

 import lxml.etree

 tree = lxml.etree.parse("leg.xml")
 for dog in tree.xpath("//Leg1:Dog",
                       namespaces={"Leg1": "http://what.not"}):
     parent = dog.xpath("..")[0]
     parent.remove(dog)
     parent.text = None
 tree.write("leg.out.xml")

现在leg.out.xml看起来像这样:

 <?xml version="1.0"?>
 <Leg1:MOR xmlns:Leg1="http://what.not" oCount="7">
   <Leg1:Order>
     <Leg1:CTemp id="FO">
       <Leg1:Group bNum="001" cCount="4"/>
       <Leg1:Group bNum="002" cCount="4"/>
     </Leg1:CTemp>
     <Leg1:CTemp id="GO">
       <Leg1:Group bNum="001" cCount="4"/>
       <Leg1:Group bNum="002" cCount="4"/>
     </Leg1:CTemp>
   </Leg1:Order>
 </Leg1:MOR>

如何修改代码以从所有元素的标记名称中删除Leg1:名称空间前缀?

How do I modify my code to remove the Leg1: namespace prefix from all of the elements' tag names?

推荐答案

从每个元素中删除名称空间前缀的一种可能方法:

One possible way to remove namespace prefix from each element :

def strip_ns_prefix(tree):
    #iterate through only element nodes (skip comment node, text node, etc) :
    for element in tree.xpath('descendant-or-self::*'):
        #if element has prefix...
        if element.prefix:
            #replace element name with its local name
            element.tag = etree.QName(element).localname
    return tree

另一个版本，它在xpath中有名称空间检查，而不是使用if语句:

Another version which has namespace checking in the xpath instead of using if statement :

def strip_ns_prefix(tree):
    #xpath query for selecting all element nodes in namespace
    query = "descendant-or-self::*[namespace-uri()!='']"
    #for each element returned by the above xpath query...
    for element in tree.xpath(query):
        #replace element name with its local name
        element.tag = etree.QName(element).localname
    return tree

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