input: Write a python function to check the status code of a GET request to a given URL.
  assert check_get_status('https://jsonplaceholder.typicode.com/posts/1') == 200
  assert check_get_status('https://jsonplaceholder.typicode.com/invalidurl') == 404
output: import requests
  
  def check_get_status(url):
      response = requests.get(url)
      return response.status_code