这个是一个雅虎搜索的爬虫，首先你在雅虎搜索上输入你要搜素的东西，然后程序可以自动爬取下来。默认爬取20页，你也可以修改-This is a Yahoo! search of reptiles, first you enter the search elements you want to search something on Yahoo, then the program can automatically crawl down. The default crawling 20, you ca