1 def parse(source, handler, errorHandler=ErrorHandler()):
2     parser = make_parser()
3     parser.setContentHandler(handler)
4     parser.setErrorHandler(errorHandler)
5     parser.parse(source)
# 可以看出来，执行xml解析至少需要两个参数：source：源文件路径和实例化的handler对象

<bookstore><book category="CHILDREN"><title>Harry Potter</title><author>J K. Rowling</author><year>2005</year><price>29.99</price></book><book category="WEB"><title>Learning XML</title><author>Erik T. Ray</author><year>2003</year><price>39.95</price></book>
</bookstore>

#!usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/5/30 22:43
# @Author  : Adong_Chenfrom xml import saxclass TestHandler(sax.ContentHandler):                # 定义自己的handler类，继承sax.ContentHandlerdef __init__(self):sax.ContentHandler.__init__(self)     # 弗父类和子类都需要初始化（做一些变量的赋值操作等）self._content = ""self._tag = ""def startElement(self, name, attrs):           # 遇到<tag>标签时候会执行的方法，这里的name，attrs不用自己传值的（这里其实是重写）self._tag = nameif name == "bookstore":print "=========BOOKSTORE========="if self._tag == "book":print "BOOK: " + attrs["category"]print "--------------------------"def endElement(self, name):　　　　　　　　　　　　　　# 遇到</tag>执行的方法，name不用自己传值（重写）# print "endElement"if name == "bookstore":print "=========BOOKSTORE========="elif name == "title":print "Title: " + self._contentelif name == "author":print "Author: " + self._contentelif name == "year":print "Year: " + self._contentelif name == "price":print "Price: " + self._contentelse:passdef characters(self, content):                      # 获取标签内容self._content = contentif __name__ == "__main__":handler = TestHandler()         # 自定义类实例化成对象sax.parse("Test2.xml", handler)  # 解析xml文件

=========BOOKSTORE=========
BOOK: CHILDREN
--------------------------
Title: Harry Potter
Author: J K. Rowling
Year: 2005
Price: 29.99
BOOK: WEB
--------------------------
Title: Learning XML
Author: Erik T. Ray
Year: 2003
Price: 39.95
=========BOOKSTORE=========