問題如下：
craw?1?:?https://baike.baidu.com/item/%E5%90%B4%E4%BA%A6%E5%87%A1/8325774?fr=aladdin
Traceback?(most?recent?call?last):
??File?"D:\Documents\Downloads\eclipse\eclipse練習(xí)\1\kris\spider_main.py",?line?48,?in?<module>
????obj_spider.craw(root_url)
??File?"D:\Documents\Downloads\eclipse\eclipse練習(xí)\1\kris\spider_main.py",?line?26,?in?craw
????new_urls,?new_data?=?self.parser.parse(new_url,?html_cont)
TypeError:?'NoneType'?object?is?not?iterable
拜托各位大神幫忙分析一下
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