Python how to grab url of scraped website code example

Example: BeautifulSoup - scraping the link of the website

import requests
from bs4 import BeautifulSoup

page = requests.get('http://www.example.com')
soup = BeautifulSoup(page.content, 'html.parser')

print(soup.select_one('p a').attrs['href'])  # get the link of the website