How to send email from Python script using PHP script

Question

I am trying to execute a php mail script from my python code with two variables, but I don't know how to initiate that php script which is on a live server from my python code while entering two variables:

<?php
$sub= $_GET['sub'];
$mes= $_GET['mes'];
// send email
mail("test@gmail.com",$sub,$mes);
?> 

and I want to try to fill in two variables by just calling the url within python script something like:

domain.com/text.php?sub=subject&mes=message

   subject = My Subject is
   message = My Message is
   try:
      ping.verbose_ping('domain.com/text.php?sub=subject&mes=message, count=3)
   except subprocess.CalledProcessError:
      print ("Couldn't get a ping.")
         

I tried to ping but its not working.