"""Extract list of URLs in a web pageThis program is part of "Dive Into Python", a free Python book forexperienced programmers.  Visit http://diveintopython.org/ for thelatest version."""__author__ = "Mark Pilgrim (mark@diveintopython.org)"__version__ = "$Revision: 1.2 $"__date__ = "$Date: 2004/05/05 21:57:19 $"__copyright__ = "Copyright (c) 2001 Mark Pilgrim"__license__ = "Python"from sgmllib import SGMLParserclass 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)if __name__ == "__main__":	import urllib	usock = urllib.urlopen("http://diveintopython.org/")	parser = URLLister()	parser.feed(usock.read())	parser.close()	usock.close()	for url in parser.urls: print url