Python3.7爬虫报错处理bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: ht

bs4.FeatureNotFound: Couldn’t find a tree builder with the features you requested: html_parser. Do you need to install a parser library? 使用BeautifulSoup时，把解析器换成lxml就出错 原因： 缺少lxml库。在cmd命令下输入”pip instal

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