利用scrapy框架写的python爬虫程序，使用爬取代理的案例来讲解的。(Scrapy framework is used to program crawler procedures in Python.)

一个简单健壮的多线程爬虫程序，可以添加代理IP池、url池。并且已经构造好请求头和异常处理(A simple and robust crawler program, which can add agent IP pool and URL pool. And have constructed the request header and exception handling)