Python_API_Structured Markup Processing Tools_sgmllib.SGMLParser.reset

API文档：

SGMLParser.reset()

     Reset the instance. Loses all unprocessed data. This is called implicitly at instantiation time.

翻译文档:

    reset有SGMLParser的__init__调用，在reset进行初始化的工作。

例子：

#! /usr/bin/env python
#coding=utf-8

from sgmllib import SGMLParser

class URLLister(SGMLParser):
    def reset(self):
        SGMLParser.reset(self)
        self.urls=[]
    
    def start_a(self,attrs):
        href = [v for k,v in attrs if k=='href']
        if href:
            self.urls.extend(href)
             

import urllib

usock = urllib.urlopen('http://www.baidu.com')
parser = URLLister()
parser.feed(usock.read())

usock.close()
parser.close()


for url in parser.urls:
    print url