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向所有XML属性添加偏移量

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我有一个XML文件

<?xml version="1.0" encoding="ISO-8859-1" standalone="yes"?>
<PageDescription>
    <Page>
        <Row />
        <Row>
            <Cell cellRow="0" cellColumn="0" Pos="693" />           
            <Cell cellRow="0" cellColumn="1" Pos="2693" />
        </Row>
    </Page>
</PageDescription>

,包含不同的结构和属性 . 现在我想通过添加一个特定的偏移来改变例如属性Pos的值,在这种情况下为12.但是我得到了一个错误 .

for currfile in allfiles:

    filepathstr = xmldir + "/" + currfile;    
    tree = xee.ElementTree(file=filepathstr)

    for tag in tree.findall('Page'):
        for tag2 in tag.findall('Row'):
            for tag3 in tag2.findall('Cell'):                              

                selectTag = tag3.attrib['Pos']
                newVal = int(selectTag)+12
                tag3.set('Pos', newVal)

expfilename = expdir + "/" + currfile

tree.write(expfilename,encoding="ISO-8859-1")

我收到以下错误

<class 'xml.etree.ElementTree.ElementTree'>
    ---------------------------------------------------------------------------
    TypeError                                 
    Traceback (most recent call last)

C:\ProgramData\Anaconda3\lib\xml\etree\ElementTree.py in _escape_attrib(text)
   1079     try:
-> 1080         if "&" in text:
   1081             text = text.replace("&", "&amp;")

TypeError: argument of type 'int' is not iterable

During handling of the above exception, another exception occurred:

TypeError                                 Traceback (most recent call last)
<ipython-input-2-b1ffea99d1f3> in <module>()
 67     expfilename = expdir + "/" + currfile
 68 
---> 69     tree.write(expfilename,encoding="ISO-8859-1")

有人看到错误吗?或者使用XPath更容易完成此类任务?

1 回答

  • 0

    在ElementTree中,属性值必须是显式字符串,没有自动类型转换 .

    如果你想存储其他东西,比如 int ,你必须自己进行转换 . 毕竟,当你读取属性值时,你得到了一个字符串并自己转换为 int .

    使用XPath将消除对嵌套循环的需求 .

    for currfile in allfiles:
        tree = xee.ElementTree(os.path.join(xmldir, currfile))
    
        for cell in tree.findall('./Page/Row/Cell'):
            pos = int(cell.get('Pos'))
            cell.set('Pos', str(pos + 12))
    
        tree.write(os.path.join(expdir, currfile))
    

    此外,除非有充分的理由,否则不要将XML文件存储在ISO-8859-1等传统的enconding中 . 使用Unicode编码,如UTF-8 .

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