python - 属性错误 : 'NoneType' object has no attribute 'nodeValue'

Question

我正在使用 ksoap 在 android 应用程序和包含以下已发布文件的 python 服务器之间进行通信。我正在尝试检索发布的 XML 文件中的所有值。但我不断收到，AttributeError: 'NoneType' object has no attribute 'nodeValue'。谁能告诉我代码有什么问题，因为我尝试调试错误但仍然失败。

部分XML文件(只有MacFilterList和Map节点可以为空):

<ProfileList>
<Profile>
    <ProfileName>Lab1</ProfileName>
    <Owner>admin</Owner>
    <Map>Lab</Map>
    <Visible>True</Visible>
    <MacFilterList>
        <string>00:14:BF:9F:5D:3A</string>
        <string>00:14:BF:9F:5D:52</string>
        <string>00:14:BF:9F:5D:37</string>
        <string>00:14:BF:9F:5D:43</string>
    </MacFilterList>
</Profile>
    .
    .
</ProfileList>

soapAPI.py(PROFILE_XML 指的是 xml 文件的文件名。):

def __init__(self):  
    self.profileFile = Config.PROFILE_XML
    self.profile = XML_ProfileDataStore()
    self.profile.LoadXMLFile(self.profileFile) 
               .
               .
def GetAllProfileData(self):
    self.profileFile = Config.PROFILE_XML
    self.profile.LoadXMLFile(self.profileFile) 
    result = self.profile.GetAllProfileData()
    return result 

profileData.py(类 XML_ProfileDataStore 所在的位置):

def GetAllProfileData(self):

    #Get a node list containing nodes with name Location
    ProfileList = self.XMLdoc.getElementsByTagName('Profile')
    NumArgCheck = 0
    profiles=""

    #For each location node in list
    for profileNode in ProfileList:
        #For each child nodes in Location node, compare the XY coordinates
        for ChildNode in profileNode.childNodes:
            #If child node has profile name profile_name
            if (cmp(ChildNode.nodeName, 'ProfileName') == 0):
                NumArgCheck += 1
                profiles = profiles + ChildNode.firstChild.data + ","
                ChildNode = ChildNode.nextSibling
                profiles = profiles + ChildNode.firstChild.nodeValue + ","
                ChildNode = ChildNode.nextSibling
                profiles = profiles + ChildNode.firstChild.nodeValue + ","
                ChildNode = ChildNode.nextSibling
                profiles = profiles + ChildNode.firstChild.nodeValue
                ChildNode = ChildNode.nextSibling

                for child in ChildNode.childNodes:
                   profiles = profiles + "," + child.firstChild.nodeValue
                profiles = profiles+";"

    return profiles

Answer 1

这意味着某些方法/属性返回了None，而您试图访问它的nodeValue 属性。您的算法有误，或者您需要在访问属性之前测试 None。抱歉，我帮不了你更多，我从来没有用过这个库。