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查看此处的文档:https://docs.python.org/3.8/library/xml.etree.elementtree.html,我制定了以下脚本来解析 XML 字符串以获得特定的元素节点:

response = """
    <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <SOAP-ENV:Body>
          <UserLoginResponse xmlns="urn:WsAPIUserIntf-IWsAPIUser">
             <return xmlns="http://omniticket.network/ovw7">
                <ERROR>
                   <CODE>200</CODE>
                   <TYPE>Managed</TYPE>
                   <TEXT>Success</TEXT>
                </ERROR>
                <SESSIONID>TestSession</SESSIONID>
                <USERCODE>API001</USERCODE>
                <APPSERVERVERSION>7.4.9.11</APPSERVERVERSION>
                <LANGUAGEID>-1</LANGUAGEID>
                <PASSWORDEXPIRATION>2020-12-31</PASSWORDEXPIRATION>
                <USERAK>FHFHFHFHFHF</USERAK>
             </return>
          </UserLoginResponse>
       </SOAP-ENV:Body>
    </SOAP-ENV:Envelope>
"""

namespaces = {
    'UserLoginResponse': 'urn:WsAPIUserIntf-IWsAPIUser',
}

for UserLoginResponse in xml.etree.ElementTree.fromstring(response).findall('UserLoginResponse:return', namespaces):
    print(UserLoginResponse)

xml.etree.ElementTree.fromstring(response).findall然而,解压后的数组中没有任何内容。

我究竟做错了什么?

4

1 回答 1

2

<return>元素的命名空间是http://omniticket.network/ovw7.

namespaces = {
    'UserLoginResponse': 'urn:WsAPIUserIntf-IWsAPIUser',
    'ovw7': 'http://omniticket.network/ovw7',
}

tree.findall('.//ovw7:return', namespaces)

# -> [<Element '{http://omniticket.network/ovw7}return' at 0x02FB82A0>]

.//XPath 开头的 在这里是必需的。

所有包含的元素也在该命名空间中。您还必须为其中任何一个使用前缀:

tree.find('.//ovw7:return/ovw7:SESSIONID', namespaces)

# -> <Element '{http://omniticket.network/ovw7}SESSIONID' at 0x02FB8510>
于 2019-12-03T12:58:23.700 回答