在Python中使用elementTree搜索和删除element [英] Search and remove element with elementTree in Python

问题描述

我有一个XML文档，我想在其中搜索某些元素，如果它们符合某些条件
，我想删除它们

I have an XML document in which I want to search for some elements and if they match some criteria I would like to delete them

但是，我似乎无法访问该元素的父级，以便可以将其删除

However, I cannot seem to be able to access the parent of the element so that I can delete it

file = open('test.xml', "r")
elem = ElementTree.parse(file)

namespace = "{http://somens}"

props = elem.findall('.//{0}prop'.format(namespace))
for prop in props:
    type = prop.attrib.get('type', None)
    if type == 'json':
        value = json.loads(prop.attrib['value'])
        if value['name'] == 'Page1.Button1':
            #here I need to access the parent of prop
            # in order to delete the prop

谢谢

推荐答案

使用删除方法删除子元素。要删除元素，您必须调用其父元素的删除方法。不幸的是， Element 没有提供对其父母的引用，因此，由您来跟踪父子关系（这不利于您使用 elem.findall（））

You can remove child elements with the according remove method. To remove an element you have to call its parents remove method. Unfortunately Element does not provide a reference to its parents, so it is up to you to keep track of parent/child relations (which speaks against your use of elem.findall())

建议的解决方案如下：

root = elem.getroot()
for child in root:
    if child.name != "prop":
        continue
    if True:# TODO: do your check here!
        root.remove(child)

PS：请勿使用 prop.attrib.get（），使用 prop.get（），如此处。

PS: don't use prop.attrib.get(), use prop.get(), as explained here.

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