环境是win10 python3.5
安装beautifulsoup后，运行测试报错
from bs4 import BeautifulSoup soup = BeautifulSoup(‘<p>Hello</p>‘, ‘lxml‘) print(soup.p.string)
Traceback (most recent call last): File "C:\Users\Lenovo\Desktop\Spider_1.py", line 6, in <module> soup = BeautifulSoup(req.content,"lxml") File "C:\Users\Lenovo\AppData\Local\Programs\Python\Python35\lib\site-packages\bs4\__init__.py", line 165, 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?
经过测试发现是lxml的问题，使用 pip install lxml时，自动安装的 4.1.1版本，
下载lxml 3.7.3 安装后，问题解决
