如何使用 Python ElementTree 提取 xml 属性
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How to extract xml attribute using Python ElementTree
提问by Will Curran
For:
为了：
<foo>
<bar key="value">text</bar>
</foo>
How do I get "value"?
我如何获得“价值”？
xml.findtext("./bar[@key]")
Throws an error.
抛出错误。
采纳答案by unutbu
This will find the first instance of an element named barand return the value of the attribute key.
这将找到命名的元素的第一个实例bar并返回属性的值key。
In [52]: import xml.etree.ElementTree as ET
In [53]: xml=ET.fromstring(contents)
In [54]: xml.find('./bar').attrib['key']
Out[54]: 'value'
回答by unutbu
Your expression:
你的表情：
./bar[@key]
./bar[@key]
It means: barchildren having keyattribute
这意味着：bar孩子有key属性
If you want to select the attribute, use this relative expression:
如果要选择属性，请使用以下相对表达式：
bar/@key
It means: the keyattribute of barchildren
意思是：孩子的key属性bar
Of course, you need to consider to use a fully compliant XPath engine like lxml.
当然，您需要考虑使用完全兼容的 XPath 引擎，例如lxml。
回答by rashok
Getting child tag's attribute value in a XML using ElementTree
使用 ElementTree 在 XML 中获取子标签的属性值
Parse the XML file and get the roottag and then using [0]will give us first child tag. Similarly [1], [2]gives us subsequent child tags. After getting child tag use .attrib[attribute_name]to get value of that attribute.
解析 XML 文件并获取root标签，然后使用[0]将为我们提供第一个子标签。同样[1], [2]给我们后续的子标签。获取子标签后，.attrib[attribute_name]用于获取该属性的值。
>>> import xml.etree.ElementTree as ET
>>> xmlstr = '<foo><bar key="value">text</bar></foo>'
>>> root = ET.fromstring(xmlstr)
>>> root.tag
'foo'
>>> root[0].tag
'bar'
>>> root[0].attrib['key']
'value'
If the xml content is in file. You should do below task to get the root.
如果 xml 内容在文件中。您应该执行以下任务以获取root.
>>> tree = ET.parse('file.xml')
>>> root = tree.getroot()
回答by dipenparmar12
By following method you can get all attributes from xml (in Dictionary)
通过以下方法，您可以从 xml（在字典中）获取所有属性
import xml.etree.ElementTree as etree
xmlString= "<feed xml:lang='en'><title>World Wide Web</title><subtitle lang='en'>Programming challenges</subtitle><link rel='alternate' type='text/html' href='http://google.com/'/><updated>2019-12-25T12:00:00</updated></feed>"
xml= etree.fromstring(xmlString)
def get_attr(xml):
attributes = []
for child in (xml):
if len(child.attrib)!= 0:
attributes.append(child.attrib)
get_attr(child)
return attributes
attributes = get_attr(xml)
print(attributes)
