...
soup = BeautifulSoup(html, "lxml")
File "/Library/Python/2.7/site-packages/bs4/__init__.py", line 152, in __init__
% ",".join(features))
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
...
soup = BeautifulSoup(html, "lxml")
File "/L
阅读背景：
bs4。FeatureNotFound:找不到具有您所要求的特性的树构建器:lxml。需要安装解析器库吗?
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