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我正在使用 lxml 解析和对象化路径中的 xml 文件，我有很多模型和 xsd，每个对象模型都映射到某些定义的类，例如，如果 xml 以模型标记开头，那么它是一个 dataModel，如果它开始带有页面标签的它是一个视图模型。

我的问题是如何以有效的方式检测 xml 文件以哪个标签开头，然后用适当的 xsd 文件对其进行解析，然后将其对象化

files = glob(os.path.join('resources/xml', '*.xml'))
for f in files:
    xmlinput = open(f)
    xmlContent = xmlinput.read()

    if xsdPath:
        xsdFile = open(xsdPath)
        # xsdFile should retrieve according to xml content
        schema = etree.XMLSchema(file=xsdFile)

        xmlinput.seek(0)
        myxml = etree.parse(xmlinput)

        try:
            schema.assertValid(myxml)

        except etree.DocumentInvalid as x:
            print "In file %s error %s has occurred." % (xmlPath, x.message)
        finally:
            xsdFile.close()

    xmlinput.close()
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1 回答 1

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我放下自愿的文件阅读和治疗，专注于你的问题：

>>> from lxml.etree import fromstring
>>> # We have XMLs with different root tag
>>> tree1 = fromstring("<model><foo/><bar/></model>")
>>> tree2 = fromstring("<page><baz/><blah/></page>")
>>>
>>> # We have different treatments
>>> def modelTreatement(etree):
...     return etree.xpath('//bar')
...
>>> def pageTreatment(etree):
...     return etree.xpath('//blah')
...
>>> # Here is a recipe to read the root tag
>>> tree1.getroottree().getroot().tag
'model'
>>> tree2.getroottree().getroot().tag
'page'
>>>
>>> # So, by building an appropriated dict :
>>> tag_to_treatment_map = {'model': modelTreatement, 'page': pageTreatment}
>>> # You can run the right method on the right tree
>>> for tree in [tree1, tree2]:
...     tag_to_treatment_map[tree.getroottree().getroot().tag](tree)
...
[<Element bar at 0x24979b0>]
[<Element blah at 0x2497a00>]

希望这对某人有用，即使我之前没有看到过。

于 2012-08-06T16:47:05.303 回答