Question

我卡住了，我编写了一个代码，用于在xml文件中查找特定索引。但是当发现Index不会创建一个只有index in和constant参数的新xml文件时。它返回一个错误：

...rba_u_xml.py", line 29, in <module>
ObjectDictionary.remove(Variable)
File "C:\Python27\lib\xml\etree\ElementTree.py", line 337, in remove
self._children.remove(element)
ValueError: list.remove(x): x not in list

这是我的代码：

import xml.etree.ElementTree as ET
tree = ET.parse('master.xml')
root = tree.getroot()

s = input('Insert a number of index and add quotes(") befor and after: ')
i = int(s, 16)

for MagicNumber in root.findall('MagicNumber'):   #constant parameters
    print MagicNumber.tag,':', MagicNumber.text
    print('\n')
for FileInfo in root.find('FileInfo'):
    print FileInfo.tag,':', FileInfo.text
print''
for DeviceInfo in root.find('DeviceInfo'):
    print DeviceInfo.tag,':', DeviceInfo.text
print''
for DummyUsage in root.find('DummyUsage'):
    print DummyUsage.tag,':', DummyUsage.text
print''
for ObjectDictionary in root.find('ObjectDictionary'):
    name=ObjectDictionary.get('name')
    print ObjectDictionary.tag,':', ObjectDictionary.text, name
    print''                                                       #constant parameters

    for Variable in ObjectDictionary.iter('Variable'):          #searching for Variables in index
        if Variable.find('./Index').text == str(i):
            print 'Variable name: ', Variable.attrib['name']
        elif Variable.find('./Index').text != str(i):
            ObjectDictionary.remove(Variable)

    for Record in ObjectDictionary.iter('Record'):             #searching for Records in index
        if Record.find('./Index').text == str(i):
            print 'Record name: ', Record.attrib['name']
        elif Record.find('./Index').text != str(i):
            ObjectDictionary.remove(Record)

    for Array in ObjectDictionary.iter('Array'):               #searching for Arrays in index
        if Array.find('./Index').text == str(i):
            print 'Array name: ', Array.attrib['name']
        elif Array.find('./Index').text != str(i):
            ObjectDictionary.remove(Array)


tree.write('output.xml')            #That would be amended to create a new xml file

感谢您的帮助！我希望你理解（在另一个案例中），因为我经常使用谷歌翻译：）

Answer 1

我解决了！：D Insted of xml.etree.ElementTree modul我使用xml模块和insted ObjectDictionary.remove（变量）我使用Variable.clear（）

我使用lxml模块

from lxml import etree as ET
tree = ET.parse('master.xml')
root = tree.getroot()

-

s = input('Insert a number of index and add quotes(") befor and after: ')
i = int(s, 16)

for MagicNumber in root.findall('MagicNumber'):   #constant parameters
    print MagicNumber.tag,':', MagicNumber.text
    print('\n')
for FileInfo in root.find('FileInfo'):
    print FileInfo.tag,':', FileInfo.text
print''
for DeviceInfo in root.find('DeviceInfo'):
    print DeviceInfo.tag,':', DeviceInfo.text
print''
for DummyUsage in root.find('DummyUsage'):
    print DummyUsage.tag,':', DummyUsage.text
print''
for ObjectDictionary in root.find('ObjectDictionary'):
    name=ObjectDictionary.get('name')
    print ObjectDictionary.tag,':', ObjectDictionary.text, name
    print''                                                       #constant parameters

    for Variable in ObjectDictionary.iter('Variable'):          #searching for Variables in index
        if Variable.find('./Index').text == str(i):
            print 'Variable name: ', Variable.attrib['name']
        elif Variable.find('./Index').text != str(i):
            Variable.clear()                         #insted of ObjectDictionary.remove(Variable)

    for Record in ObjectDictionary.iter('Record'):             #searching for Records in index
        if Record.find('./Index').text == str(i):
            print 'Record name: ', Record.attrib['name']
        elif Record.find('./Index').text != str(i):
            Record.clear()                             #insted of ObjectDictionary.remove(Record)

    for Array in ObjectDictionary.iter('Array'):               #searching for Arrays in index
        if Array.find('./Index').text == str(i):
            print 'Array name: ', Array.attrib['name']
        elif Array.find('./Index').text != str(i):
            Array.clear()                               #insted of ObjectDictionary.remove(Array)


tree.write('output.xml')            #create a new xml file

在新的xml文件中，现在只剩下变量，记录和数组的标记。

<Group name="OptionalObjects"> <Array/><Array/><Variable/><Variable/><Variable/><Record/><Record/><Record/><Record/><Record/><Record/><Record/><Record/></Group>

有谁知道如何解决这个（我希望）最后一个问题？

Python：修改XML文件

1 个答案: