basic function to test time counting.

pushme.py

import time


def send_push(user_id):
    """
        demo function to send notification
    """
    print("Start: "+str(user_id))
    time.sleep(1) # sleep 1 second when sending notification.
    print("Complete: "+str(user_id))



def main():
    user_count = int(input("Enter total user: "))
    t1 = time.time()  # starting time

    # Start sending notification to eatch user 
    for i in range(user_count):
        send_push(i)

    # End time.    
    total_time = time.time() - t1 
    print("Total time: " + str(total_time))

if __name__=='__main__':
    main()