python解析xml

主要是查询标签：

import xml.dom.minidom

s='''xml字符串'''

'''
这里做一些解释：
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soapenv:Body>  #这种形式的，前面的soapenv表示命名空间url（namespaceURI），需要使用getElementsByTagNameNS来查找，若要使用getElementsByTagName()查找，就必须带上完整的namespaceURI:tagname(此处就是soapenv:Body)
        <ns1:vRBTOneKeyPress soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns1="http://impl.crbt.cmcc.com">
            <event href="#id0"/>
        </ns1:vRBTOneKeyPress>
        <multiRef id="id0" soapenc:root="0" soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xsi:type="ns2:VRBTOneKeyPressEvt" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ns2="http://schemas.crbt.cmcc.com">
            <DID xsi:type="xsd:string">xxxxxxxxxx</DID>
            <DIDPwd xsi:type="xsd:string">xxxxxxxxxx</DIDPwd>
            <SEQ xsi:type="xsd:string">xxxxxxxxxx</SEQ>
            <calledNumber xsi:type="xsd:string">xxxxxxxxxx</calledNumber>
            <callingNumber xsi:type="xsd:string">xxxxxxxxxx</callingNumber>
            <key xsi:type="xsd:string">xxxxxxxxxx</key>
            <timeStamp xsi:type="xsd:string">xxxxxxxxxx</timeStamp>    #这种前面不带namespaceURI的，就可以直接使用getElementsByTagName()查找
            <toneID xsi:type="xsd:string">xxxxxxxxxx</toneID>
            <playScene xsi:type="xsd:string">xxxxxxxxxx</playScene>
            <pressType xsi:type="xsd:string">xxxxxxxxxx</pressType>
            <callID xsi:type="xsd:string">xxxxxxxxxx</callID>
        </multiRef>
    </soapenv:Body>
</soapenv:Envelope>
'''


DOMTree = xml.dom.minidom.parseString(s)
collection = DOMTree.documentElement        #文档
namespaceUrl = collection.namespaceURI        #命名空间
body = collection.getElementsByTagName('timeStamp')    #查询该标签，返回的是一个列表
print(body[0].firstChild.data)        #获取标签的内容，按照示例文本，这里输出为xxxxxxxxxx