使用漂亮的汤或python中的任何其他方法解析Autosar arxml答案

【问题标题】：Parsing Autosar arxml using beautiful soup or any other method in python使用漂亮的汤或python中的任何其他方法解析Autosar arxml
【发布时间】：2020-05-01 18:52:45
【问题描述】：

我正在处理 autosar 文件，在 Autosar 我们使用 .arxml 文件，在下面的 arxml 文件中，我想要解析一些数据（DTC 值 ex:112068）

.arxml：

  <ECUC-CONTAINER-VALUE>
   <SHORT-NAME>DTC_AD</SHORT-NAME>
   <DEFINITION-REF DEST="ECUC-PARAM-CONF-CONTAINER-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass</DEFINITION-REF>
   <PARAMETER-VALUES>
    <ECUC-NUMERICAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-INTEGER-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTC</DEFINITION-REF>
     <VALUE>112068</VALUE>
    </ECUC-NUMERICAL-PARAM-VALUE>
    <ECUC-TEXTUAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-STRING-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTCDescription</DEFINITION-REF>
     <VALUE>AD temp</VALUE>
    </ECUC-TEXTUAL-PARAM-VALUE>
    <ECUC-NUMERICAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-INTEGER-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTCFunctionalUnit</DEFINITION-REF>
     <VALUE>1</VALUE>
    </ECUC-NUMERICAL-PARAM-VALUE>
   </PARAMETER-VALUES>
  </ECUC-CONTAINER-VALUE>
  <ECUC-CONTAINER-VALUE>
   <SHORT-NAME>DTC_Lost</SHORT-NAME>
   <DEFINITION-REF DEST="ECUC-PARAM-CONF-CONTAINER-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass</DEFINITION-REF>
   <PARAMETER-VALUES>
    <ECUC-NUMERICAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-INTEGER-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTC</DEFINITION-REF>
     <VALUE>126630</VALUE>
    </ECUC-NUMERICAL-PARAM-VALUE>
    <ECUC-TEXTUAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-STRING-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTCDescription</DEFINITION-REF>
     <VALUE>LostCOMM</VALUE>
    </ECUC-TEXTUAL-PARAM-VALUE>
    <ECUC-NUMERICAL-PARAM-VALUE>
     <DEFINITION-REF DEST="ECUC-INTEGER-PARAM-DEF">/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTCFunctionalUnit</DEFINITION-REF>
     <VALUE>1</VALUE>
    </ECUC-NUMERICAL-PARAM-VALUE>
   </PARAMETER-VALUES>
  </ECUC-CONTAINER-VALUE>

我也试过下面的代码，但没有得到想要的输出：

from bs4 import BeautifulSoup as Soup

def diff_method():
    handler = open('Dem_PRJ_8CH_EcucValues.arxml').read()
    soup = Soup(handler,"html.parser")  
    for ecuc_container in soup.find_all('ecuc-container-value'):
        for def_ref in ecuc_container.find_all('definition-ref'):
            #print(def_ref.get_text())
            if (def_ref.get_text() == '/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTC'):
                print(ecuc_container.get_text())

if __name__ == "__main__":

    diff_method()

预期输出：

112068
126630

【问题讨论】：

标签： python beautifulsoup xml-parsing html-parsing

【解决方案1】：

如果handler 变量是问题中的XML 文本，您可以使用此示例从<value> 标签中获取值：

from bs4 import BeautifulSoup

soup = BeautifulSoup(handler, 'html.parser')

for definition in soup.select('definition-ref:has(~ value)'):
    if definition.get_text(strip=True) == '/AUTOSAR_Dem/EcucModuleDefs/Dem/DemConfigSet/DemDTCClass/DemDTC':
        print(definition.find_next('value').text)

打印：

112068
126630

【讨论】：

它不工作......我已经测试了下面的错误：for definition in soup.select('definition-ref:has(~ value)'): '只实现了以下伪类：nth -of-type.') NotImplementedError：仅实现以下伪类：nth-of-type.
@Techblog 看来您使用的是旧版本的bs4。更新它，它会工作。