通过python解析嵌套的xml，给出空列表而不是标记值

6ju8rftf 于 2021-07-13 发布在 Java

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我想从以下xml（soap api）获取所有id标记值：

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <infasoapns:Body xmlns:eAPI="http://api.ppdi.com/1.1/Site" xmlns:infasoapns="http://schemas.xmlsoap.org/soap/envelope/" xmlns:infawsdlns="http://schemas.xmlsoap.org/wsdl/">
      <eAPI:getSiteResponse>
         <eAPI:SITE>
            <eAPI:Id>CTMSR_1-1036KJ</eAPI:Id>
            <eAPI:Sponsor>Ell Inc</eAPI:Sponsor>
            <eAPI:CRO>PDP</eAPI:CRO>
            <eAPI:Protocol_Number>EL184-308</eAPI:Protocol_Number>
            <eAPI:Protocol_Id>CTMSR_1-LCXB0</eAPI:Protocol_Id>
        </eAPI:SITE>
        <eAPI:SITE>
            <eAPI:Id>CTMSR_1-1036SM</eAPI:Id>
            <eAPI:Sponsor>Ell Inc</eAPI:Sponsor>
            <eAPI:CRO>PDP</eAPI:CRO>
            <eAPI:Protocol_Number>EL184-308</eAPI:Protocol_Number>
            <eAPI:Protocol_Id>CTMSR_1-LCXB0</eAPI:Protocol_Id>
        </eAPI:SITE>
        <eAPI:SITE>
            <eAPI:Id>CTMSR_1-1036SM</eAPI:Id>
            <eAPI:Sponsor>Ell Inc</eAPI:Sponsor>
            <eAPI:CRO>PDP</eAPI:CRO>
            <eAPI:Protocol_Number>EL184-308</eAPI:Protocol_Number>
            <eAPI:Protocol_Id>CTMSR_1-LCXB0</eAPI:Protocol_Id>
        </eAPI:SITE>
      </eAPI:getSiteResponse>
   </infasoapns:Body>
</soapenv:Envelope>

下面是我编写的代码，它在输出中给出了空列表
当我运行tree.findall（'.//id'）时，它给出了输出：[]
当我运行print（tree.find（'id'））时，它给出了输出：none
当我运行tree.find（'id'）.text时，它给出了输出：
---->1 tree.find（'id'）.text中的attributeerror回溯（最近一次调用last）
attributeerror:“nonetype”对象没有属性“text”
代码：

>>> import xml.etree.cElementTree as ElementTree
>>> file_path = 'C:\\Users\\dshukla\\Desktop\\docs\\PPD project\\Response\\WS_SITES_1.1_RES'
>>> tree = ElementTree.parse(file_path)
>>> root = tree.getroot()
>>> print(root)
<Element '{http://schemas.xmlsoap.org/soap/envelope/}Envelope' at 0x00000238F6BFCD10>
>>> tree.findall('.//Id')
[]
>>> tree.find('Id')
>>> print(tree.find('Id'))
None
>>> tree.find('Id').text
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'text'
>>>

为什么我得到空列表/无类型错误？如何从这个xml文件中获取id标记的值

python xml xml-parsing soap elementtree

来源：https://stackoverflow.com/questions/67288239/parsing-nested-xml-via-python-giving-empty-list-instead-of-tag-values

1条答案

按热度按时间

uxh89sit1#

您需要将名称空间传递给 findall() . 文件中有四个命名空间。

import xml.etree.cElementTree as ElementTree
file_path = 'yourfile.xml'  # change to your file path

tree = ElementTree.parse(file_path)

root = tree.getroot()

namespaces = {"soapenv": "http://schemas.xmlsoap.org/soap/envelope/",
              "eAPI": "http://api.ppdi.com/1.1/Site",
              "infasoapns": "http://schemas.xmlsoap.org/soap/envelope/",
              "infawsdlns": "http://schemas.xmlsoap.org/wsdl/"}

names = root.findall('*/eAPI:getSiteResponse/eAPI:SITE/eAPI:Id', namespaces)  # pass namespaces like this

for name in names:
    print(name.text)

结果是：

CTMSR_1-1036KJ
CTMSR_1-1036SM
CTMSR_1-1036SM

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通过python解析嵌套的xml，给出空列表而不是标记值

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