小弟我用minidom解析一个很简单的xml不成功啊

我用minidom解析一个很简单的xml不成功啊?
我用python2.6.4，写了这么一个python程序

Python code


from xml.dom import minidom
try:
    xmlfile = open("d:\\File1.xml", "a+")
    xmldoc = minidom.parse(xmlfile)
except :
    sys.exit(0)
Info = xmldoc.getElementsByTagName('Request_Info')[0]
Attr = Info.attributes['Request_Type'];
Type = Attr.value;
print(Type)

运行报错:
>>>
Traceback (most recent call last):
File "D:\my.py", line 8, in <module>
Attr = Info.attributes['Request_Type'];
File "C:\Python26\lib\xml\dom\minidom.py", line 530, in __getitem__
return self._attrs[attname_or_tuple]
KeyError: 'Request_Type'

我要解析的文件如下:

XML code


<?xml version="1.0" encoding="utf-8" ?>
<TT_Msg>
  <Request_Info>
    <Request_Type>XML</Request_Type>
    <Result>
      <NewDataSet>
        <RecordsTable>
          <COMPONENT>MyComponent</COMPONENT>
          <DEVELOPER>MyName</DEVELOPER>
          <TITLE>When server starts, service crashes</TITLE>
          <ISSUEID>123456</ISSUEID>
          <ID>123456</ID>
        </RecordsTable>
        <MoreInfoTable>
          <MoreRecords>False</MoreRecords>
          <ID>456</ID>
        </MoreInfoTable>
      </NewDataSet>
    </Result>
    <Msg></Msg>
  </Request_Info>
</TT_Msg>

错在哪里，怎么改?

------解决方案--------------------
<Request_Type>XML</Request_Type>是Request_Info的一个子节点，不是它的attribute.

不清楚你想要的结果，不知道要怎么改。

小弟我用minidom解析一个很简单的xml不成功啊

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