Python エラー対応

code:memo

Traceback (most recent call last):

File "scrape.py", line 236, in <module>

main()

File "scrape.py", line 30, in main

s = BeautifulSoup(r.text, 'lxml')

File "/Users/username/.pyenv/versions/3.8.3/lib/python3.8/site-packages/bs4/__init__.py", line 245, 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?