input: Write a python function to send a POST request to a given URL and return the status code of the response.
  assert post_request_status('http://example.com/') == 200
  assert post_request_status('http://httpbin.org/post') == 200
output: import requests
  
  def post_request_status(url):
      response = requests.post(url)
      return response.status_code