Installing lxml and getting this warning

[snippsat]

For Beautifulsoup you have only the dummy package
lxml is ok.
You most remember to always active environment base-dup.
To test use first code in Web-Scraping part-1 this code will test if these 3 libraries work.

import requests
from bs4 import BeautifulSoup

url = 'http://CNN.com'
response = requests.get(url)
soup = BeautifulSoup(response.content, 'lxml')
print(soup.find('title').text)

Output:
CNN International - Breaking News, US News, World News and Video

A quick run i activate environment install and run code using miniconda3.
I use cmder but command are the same in cmd.

# Activate base
G:\miniconda3\Scripts
λ activate.bat

# Cd down
(base) G:\miniconda3\Scripts
λ cd ..

# Activate my_env for you base_dup
(base) G:\miniconda3
λ conda activate my_env

# See that (my_env) look like this
# Test pip see that it point to my_env folder 
(my_env) G:\miniconda3
λ pip -V
pip 21.1.2 from G:\miniconda3\envs\my_env\lib\site-packages\pip (python 3.9)

# Install
(my_env) G:\miniconda3
λ pip install beautifulsoup4 requests lxml
Collecting beautifulsoup4
  Using cached beautifulsoup4-4.9.3-py3-none-any.whl (115 kB)
Requirement already satisfied: requests in g:\miniconda3\envs\my_env\lib\site-packages (2.25.1)
Collecting lxml
  Using cached lxml-4.6.3-cp39-cp39-win_amd64.whl (3.5 MB)
Collecting soupsieve>1.2
  Using cached soupsieve-2.2.1-py3-none-any.whl (33 kB)
Requirement already satisfied: urllib3<1.27,>=1.21.1 in g:\miniconda3\envs\my_env\lib\site-packages (from requests) (1.26.5)
Requirement already satisfied: certifi>=2017.4.17 in g:\miniconda3\envs\my_env\lib\site-packages (from requests) (2021.5.30)
Requirement already satisfied: chardet<5,>=3.0.2 in g:\miniconda3\envs\my_env\lib\site-packages (from requests) (4.0.0)
Requirement already satisfied: idna<3,>=2.5 in g:\miniconda3\envs\my_env\lib\site-packages (from requests) (2.10)
Installing collected packages: soupsieve, lxml, beautifulsoup4
Successfully installed beautifulsoup4-4.9.3 lxml-4.6.3 soupsieve-2.2.1

# See code that i run now 
(my_env) G:\miniconda3
λ type test_parse.py
import requests
from bs4 import BeautifulSoup

url = 'http://CNN.com'
response = requests.get(url)
soup = BeautifulSoup(response.content, 'lxml')
print(soup.find('title').text)

# Run code 
(my_env) G:\miniconda3
λ python test_parse.py
CNN International - Breaking News, US News, World News and Video