python->解析xml文件

'''
"D:\three_test\gpn_InternetGatewayDevice_v2.xml"

<SOAP-ENV:Envelope>
   <SOAP-ENV:Header>
      <cwmp:ID SOAP-ENV:mustUnderstand="1">1</cwmp:ID>
   </SOAP-ENV:Header>
   <SOAP-ENV:Body>
      <cwmp:GetParameterNamesResponse>
         <ParameterList xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="cwmp:ParameterInfoStruct[6570]">
            <ParameterInfoStruct>
               <Name>InternetGatewayDevice.WANDeviceNumberOfEntries</Name>
               <Writable>0</Writable>
            </ParameterInfoStruct>
            <ParameterInfoStruct>
               <Name>InternetGatewayDevice.WANDevice.</Name>
               <Writable>0</Writable>
               </ParameterInfoStruct>
            <ParameterInfoStruct>
      </cwmp:GetParameterNamesResponse>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>
'''
import xmltodict

#将xml中的数据读入内存并整个转换成一个字典，放入doc
with open(r"D:\three_test\gpn_InternetGatewayDevice_v2.xml")  as fd:
    doc = xmltodict.parse(fd.read())

#取字典中的数据也很简单，按照xml文件中的格式依次往下即可
#e.g:取结点属性
print(doc["SOAP-ENV:Envelope"]["SOAP-ENV:Header"]["cwmp:ID"]['@SOAP-ENV:mustUnderstand'])   #1
print(doc['SOAP-ENV:Envelope']['SOAP-ENV:Body']['cwmp:GetParameterNamesResponse']['ParameterList']['@xsi:type']) #SOAP-ENC:Array
#e.g.取结点值
print(doc["SOAP-ENV:Envelope"]["SOAP-ENV:Header"]["cwmp:ID"]['#text']) #1
print(doc['SOAP-ENV:Envelope']['SOAP-ENV:Body']['cwmp:GetParameterNamesResponse']['ParameterList']['ParameterInfoStruct'][0]['Name'])  #InternetGatewayDevice.WANDeviceNumberOfEntries

#e.g.如果是multiobject,将返回一个列表，列表中每一个元素都是一个对象OrderedDict([('Name', 'XXX'), ('Writable', 'X')])
list = doc["SOAP-ENV:Envelope"]["SOAP-ENV:Body"]["cwmp:GetParameterNamesResponse"]["ParameterList"]["ParameterInfoStruct"]
#遍历列表中的每一个子字典，i为列表下标
for i,obj in enumerate(list):
    print(obj['Name'])
    print(obj['Writable'])
    break;

#加入下面这两条指令，代码运行到此处就相当于打了一个断点，这中方式确定下路径是否正确效率更高。
import pdb
pdb.set_trace()