Couldn‘t find a tree builder with the features you requested: lxml.解决方案

Traceback (most recent call last):
  File "/Users/dhcc/Desktop/testPy/shuihuzhuan.py", line 18, in 
    soup = BeautifulSoup(response.text,'lxml')
  File "/Users/dhcc/Library/Python/3.8/lib/python/site-packages/bs4/__init__.py", line 248, in __init__
    raise FeatureNotFound(
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

扒取网页内容时候，报错，找不到lxml，安装 pip install lxml即可