input: Write a python function to get the HTML content of a webpage.
  assert get_html_page('https://www.example.com').startswith('<!doctype html>')
  assert 'Example Domain' in get_html_page('https://www.example.com')
  assert len(get_html_page('https://www.example.com')) > 0
output: def get_html_page(url):
      import requests
      response = requests.get(url)
      return response.text