我应该如何在python中解析此xml字符串？ [英] How should I parse this xml string in python?

问题描述

我的XML字符串是-

xmlData = """<SMSResponse xmlns="http://example.com" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
             <Cancelled>false</Cancelled>
             <MessageID>00000000-0000-0000-0000-000000000000</MessageID>  
             <Queued>false</Queued>
             <SMSError>NoError</SMSError>
             <SMSIncomingMessages i:nil="true"/>
             <Sent>false</Sent>
             <SentDateTime>0001-01-01T00:00:00</SentDateTime>
             </SMSResponse>"""

我试图解析并获取标签的值-Cancelled，MessageId，SMSError等。我正在使用python Elementtree 库。到目前为止，我已经尝试过-

I am trying to parse and get the values of tags - Cancelled, MessageId, SMSError, etc. I am using python's Elementtree library. So far, I have tried things like -

root = ET.fromstring(xmlData)
print root.find('Sent')  // gives None
for child in root:
    print chil.find('MessageId') // also gives None

虽然，我可以使用-

for child in root:
    print child.tag
    //child.tag for the tag Cancelled is - {http://example.com}Cancelled

及其相应的值-

for child in root:
    print child.text

我怎么得到类似的东西-

How do I get something like -

print child.Queued // will print false

就像PHP一样，我们可以用根访问它们-

Like in PHP we can access them with the root -

$xml = simplexml_load_string($data);
$status = $xml->SMSError;

推荐答案

您的文档上有一个名称空间，您需要在搜索时包括名称空间：

Your document has a namespace on it, you need to include the namespace when searching:

root = ET.fromstring(xmlData)
print root.find('{http://example.com}Sent',)
print root.find('{http://example.com}MessageID')

输出：

<Element '{http://example.com}Sent' at 0x1043e0690>
<Element '{http://example.com}MessageID' at 0x1043e0350>

find（）和 findall（）方法也带有名称空间映射；您可以搜索任意前缀，然后在该地图中查找该前缀，以节省输入内容：

The find() and findall() methods also take a namespace map; you can search for a arbitrary prefix, and the prefix will be looked up in that map, to save typing:

nsmap = {'n': 'http://example.com'}
print root.find('n:Sent', namespaces=nsmap)
print root.find('n:MessageID', namespaces=nsmap)

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