[Python] Simple website downtime monitor (+ Pushover)

monitor.py

import time
from datetime import datetime

import requests

URL = 'https://example.com'
CHECK_SECONDS = 60


def monitor():
    # Pushover API credentials
    data = {
        'token': '',
        'user': '',
    }

    down_at = None
    passes = 0

    while True:
        resp = requests.get(URL)
        if resp.status_code == 200:
            print('200 OK')
            if down_at is not None:
                print('Recovered')
                downtime = (datetime.now() - down_at).seconds / 60.0
                data.update(
                    title='SITE IS UP',
                    message='Website has recovered, total downtime %.2f minutes' % downtime
                )
                requests.post('https://api.pushover.net/1/messages.json', data=data)
            down_at = None
            passes = 0
        else:
            print('Down')
            if down_at is None:
                down_at = datetime.now()
            elif passes == 5:
                passes = 0
            else:
                # Avoid notification spam, do not send outage notification for 5 mins
                print('Pass', passes)
                passes += 1
                time.sleep(CHECK_SECONDS)
                continue

            print('Send down notification')
            data.update(
                title='SITE IS DOWN',
                message='Website is down since {}'.format(down_at.strftime('%H:%M'))
            )
            requests.post('https://api.pushover.net/1/messages.json', data=data)

        time.sleep(CHECK_SECONDS)


if __name__ == '__main__':
    monitor()