input: Write a function to scrape data from a given website using the requests and BeautifulSoup libraries. The function should take a URL as input and return the scraped data.
  
  import requests
  from bs4 import BeautifulSoup
  
  def scrape_website(url):
      page = requests.get(url)
      soup = BeautifulSoup(page.text, 'html.parser')
      # Scraping code goes here....
      return soup
  
  assert str(scrape_website('https://example.com')).startswith('<!DOCTYPE html>')
  assert 'Example Domain' in str(scrape_website('https://example.com'))
  assert 'Not Found' in str(scrape_website('https://thiswebsitedoesnotexist1234567890.com'))
  assert 'Example Domain' not in str(scrape_website('https://example.com/nonexistentpage'))
output: def scrape_website(url):
      page = requests.get(url)
      soup = BeautifulSoup(page.text, 'html.parser')
      return soup