File "C:/Users/wenfu/PycharmProjects/lian/baike_spider/spider_main.py", line 33, in <module>

    obj_spider.craw(root_url)

  File "C:/Users/wenfu/PycharmProjects/lian/baike_spider/spider_main.py", line 13, in craw

    self.urls.add_new_url(root_url)

AttributeError: 'SpiderMain' object has no attribute 'urls

为什么报错了啊

def __int__(self):
   self.urls = url_manager.UrlManager()
   self.downloader = html_downloader.HtmlDownloader()
   self.parser = html_parser.HtmlParser()
   self.outputer = html_outputer.HtmlOutputer()

我的不是有urls属性吗