图的遍历。若用有向网表示网页的链接网络，其中顶点表示某个网页，有向弧表示网页之间的链接关系。试设计一个网络蜘蛛系统，分别以广度优先和深度优先的策略抓取网页。-Graph traversal. If the web page to the network by indicating links network where vertices represent a page, there are links to the arcs represent the relationship between

在网页上抓取金融数据，获得当天股票数据，并且做数据清洗-get financial information a net page

抓取网页上的金融数据，获得股票开盘价收盘价等重要当天数据-get stock s information a page

讲诉了从中抓取某网页的特定内容，请参考代码，如有不懂请回复。-The immoral to grab a web page specific content, please refer to the code, such as have not understand please reply.