使用SAX讀取XML文件

如何使用：test.py
主程式：test.py
說明：test.py讀取books.xml後，將結果輸出至螢幕上

books.xml

  
    
    Eric S. Raymond
  
  
    
    Norman Walsh
  
  

bookhandler.py程式碼

import xml.sax.handler

class BookHandler(xml.sax.handler.ContentHandler):
  def __init__(self):
    self.inTitle = 0
    self.mapping = {}

  def startElement(self, name, attributes):
    if name == "book":
      self.buffer = ""
      self.isbn = attributes["isbn"]
    elif name == "title":
      self.inTitle = 1

  def characters(self, data):
    if self.inTitle:
      self.buffer += data

  def endElement(self, name):
    if name == "title":
      self.inTitle = 0
      self.mapping[self.isbn] = self.buffer

test.py程式碼

import xml.sax
import bookhandler
import pprint

parser = xml.sax.make_parser()
handler = bookhandler.BookHandler()
parser.setContentHandler(handler)
parser.parse("books.xml")
pprint.pprint(handler.mapping)

輸出
{u'1-56592-051-1': u'Making TeX Work',
u'1-56592-724-9': u'The Cathedral & the Bazaar'}