python 读xml文件

def getText(self,nodelist):
rc=""
for node in nodelist:
if node.nodeType == node.TEXT_NODE or node.nodeType == node.CDATA_SECTION_NODE:
rc = rc + node.data
return rc
def parseXML(self,requesturl,xml):
dom = minidom.parse(requesturl)
for node in dom.getElementsByTagName('category'):
xml.append({
'categoryid': self.getText(node.getElementsByTagName("categoryid")[0].childNodes),
'categoryname': self.getText(node.getElementsByTagName("categoryname")[0].childNodes)
})
主函数：
  xml=[]
  self.parseXML(self.file_path,xml)