def main(self):
n = 0 #初始化，第一次运行函数
dw = Downloader(self.url)
dw.GetHtml()
parser = Parser(dw.GetHtml())
self.list = parser.ReturnUrl()
urlMa = UrlManager(parser.ReturnUrl())
while n < 100: #此处开始循环
crawingurl = urlMa.print_2()[0]
print(crawingurl)
dw = Downloader(crawingurl)
dw.GetHtml()
parser = Parser(dw.GetHtml())
print(parser.ReturnTitle())
urlMa = UrlManager(parser.ReturnUrl())
n = n + 1
