ContentList = Content['stories']

headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) ''Chrome/51.0.2704.63 Safari/537.36'}
SourceURL = "http://news-at.zhihu.com/api/4/news/latest"

    Content = requests.get(SourceURL, headers=headers)
    Content = eval(Content.text)

ContentList = Content['stories']
现在ContentList里是什么

这要看你返回的是什么？你爬取的内容是个json字符串吗？你在哪学的爬虫爬取得json内容用这个eval处理？慎用eval。把json转换成字典就行，json.loads(content.text)