SAX is used in Python to parse XML instances

SAX is an event-driven API. Parsing an XML document with SAX involves two parts: a parser and an event handler. The parser is responsible for reading the XML document and sending events, such as element start and element end events, to the event handler. The event handler is responsible for responding to the event and processing the XML data that is passed.

Example:

import  sys, string from  xml.sax import  handler, make_parser

 

 class  TestHandler(handler.ContentHandler):                        

         def  __init__(self):                                                                

                 pass

                 

         def  startDocument(self):            

                 print  "Document Start ..."

                

        def  endDocument(self):                 

                print  "Document End ..."

                

        def  startElement(self, name, attrs):

                print  'start tag:', name

                

        def  endElement(self, name):

                print  'end tag:', name     

                

        def  characters(self, chrs):                                                     

                print  chrs

                

     

def  test():     

        handler = TestHandler()     

        parser = make_parser()     

        parser.setContentHandler(handler)

        f = open(sys.argv[1], 'r')     

        parser.parse(f)     

        f.close()

     

if  __name__ == '__main__':

        test()

Another way to read and write files besides the DOM.