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)
			})