提示object has no attribute 'new_urls'，看了好多遍，和老師寫的一樣啊，也沒空格大小寫問題
Traceback (most recent call last):
? File "C:\eclipse\workspace\baiduspider\spider_main.py", line 50, in <module>
? ? obj_spider.craw(root_url)
? File "C:\eclipse\workspace\baiduspider\spider_main.py", line 19, in craw
? ? self.urls.add_new_url(root_url)
? File "C:\eclipse\workspace\baiduspider\url_manager.py", line 11, in add_new_url
? ? if url not in self.new_urls and url not in self.old_urls:
AttributeError: 'UrlManager' object has no attribute 'new_urls'
2017-12-24
看看UrlManager類構造器里有沒有定義new_urls