python - 使用 ET 删除 Python 中的元素

Question

我的代码似乎出现值错误，但我不确定原因。

ValueError: list.remove(x): x not in list

当我使用打印语句时，我似乎正确找到了日志设置，因为它打印了我期望看到的位置和编号。我只是不确定为什么无法删除它。

XML
...
<security>
    <rules>
        <entry name="blah">
            <log-setting> log-forwarding-main

这是我尝试过的两个脚本

import xml.etree.ElementTree as ET
tree = ET.parse('filelocation')
rules = tree.findall('.//security/rules/entry')

for rem_rule in rules:
    log = rem_rule.findall('log-setting')
    rem_rule.remove(log)
tree.write('newfilelocation')

并在不同的帖子中尝试过此操作

import xml.etree.ElementTree as ET
tree = ET.parse('filelocation')
rules = tree.findall('.//security/rules/entry')

for rem_rule in rules[:]:
    for rem_rule in rules[:]:
        log = rem_rule.findall('log-setting')
        rem_rule.remove(log)
tree.write('newfilelocation')

Answer 1

根据文档xml.etree.ElementTree.Element有一个函数.remove(subelement)。但是，.findall() 将返回一个列表。因此，将 rem_rule.remove(log) 替换为:

for element in log:
    rem_rule.remove(element)

问题解决了。您的完整代码片段如下所示

import xml.etree.ElementTree as ET
tree = ET.parse('test.xml')
rules = tree.findall('.//security/rules/entry')

for rem_rule in rules:
    log = rem_rule.findall('log-setting')
    for element in log:
        rem_rule.remove(element)
tree.write('newtest.xml')