в моем коде пишет такую ошибку: File "C:/Users/admin/Desktop/dima1.py", line 64,

В моем коде пишет такую ошибку:
File "C:/Users/admin/Desktop/dima1.py", line 64, in poisk
soup=BeautifulSoup(f,'lxml')
File "C:\Users\admin\PycharmProjects\untitled\venv\lib\site-packages\bs4\__init__.py", line 165, in __init__
.format ( ",".join ( features ) ) )
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?
строчка 64: soup=BeautifulSoup(f,'lxml')
строчка 163-165:"Couldn't find a tree builder with the features you "
"requested: . Do you need to install a parser library?"
.format ( ",".join ( features ) ) )
Помогите безотлагательно