input: Write a python function to check if a website is accessible and returns the HTML content.
  assert check_website_accessible('https://www.example.com').status_code == 200
  assert isinstance(check_website_accessible('https://www.example.com').content, bytes)
  assert check_website_accessible('https://www.invalidurl.com').status_code != 200
output: import requests
  
  def check_website_accessible(url):
      try:
          response = requests.get(url)
          return response
      except requests.exceptions.RequestException as e:
          return e.response if e.response else requests.Response()