python解析xml文件操作实例

<?xml version="1.0" ?> 
 
 
  
 
  
  
 ma 
  
  
 xiaoju 
  
  
 
 Springs Widgets, Inc. 
 
 
  
  
  
 I think widgets are greate.You should buy lots of them forom 
  
 Spirngy Widgts, Inc 
  
  
  
 

from xml.dom import minidom, Node 
import re, textwrap 
 
class SampleScanner: 
 """""" 
 
 def __init__(self, doc): 
 """Constructor""" 
 assert(isinstance(doc, minidom.Document)) 
 for child in doc.childNodes: 
 if child.nodeType == Node.ELEMENT_NODE and 
 child.tagName == "book": 
 self.handle_book(child) 
 
 def handle_book(self, node): 
 
 for child in node.childNodes: 
 if child.nodeType != Node.ELEMENT_NODE: 
 continue 
 if child.tagName == "title": 
 print "Book titile is:", self.gettext(child.childNodes) 
 if child.tagName == "author": 
 self.handle_author(child) 
 if child.tagName == "chapter": 
 self.handle_chapter(child) 
 
 def handle_chapter(self, node): 
 number = node.getAttribute("number") 
 print "number:", number 
 title_node = node.getElementsByTagName("title") 
 print "title:", self.gettext(title_node) 
 
 for child in node.childNodes: 
 if child.nodeType != Node.ELEMENT_NODE: 
 continue 
 if child.tagName == "para": 
 self.handle_chapter_para(child) 
 
 def handle_chapter_para(self, node): 
 company = "" 
 company = self.gettext(node.getElementsByTagName("company")) 
 print "chapter:para:company", company 
 
 
 def handle_author(self, node): 
 for child in node.childNodes: 
 if child.nodeType != Node.ELEMENT_NODE: 
 continue 
 if child.tagName == "name": 
 self.handle_author_name(child) 
 if child.tagName == "affiliation": 
 print "affiliation:", self.gettext(child.childNodes) 
 
 def handle_author_name(self, node): 
 first = "" 
 last = "" 
 for child in node.childNodes: 
 if child.nodeType != Node.ELEMENT_NODE: 
 continue 
 if child.tagName == "first": 
 first = self.gettext(child.childNodes) 
 if child.tagName == 'last': 
 last = self.gettext(child.childNodes) 
 
 print "firstname:%s,lastname:%s" % (first, last) 
 
 
 def gettext(self, nodelist): 
 retlist = [] 
 for node in nodelist: 
 if node.nodeType == Node.TEXT_NODE: 
 retlist.append(node.wholeText) 
 elif node.hasChildNodes: 
 retlist.append(self.gettext(node.childNodes)) 
 
 return re.sub('s+', " ", ''.join(retlist)) 
 
 
if __name__=="__main__": 
 doc = minidom.parse("simple.xml") 
 sample = SampleScanner(doc)