import requests as r
import time
import winsound

USER = YOUR_USERNAME_HERE
PASS = YOUR_PASSWORD_HERE

s = r.Session()

last_th = -1

while True:
    res = s.post('https://grades.cs.technion.ac.il',
                 {'ID': USER, 'Password':PASS, 'submit': 'proceed', 'Page': 'grades.html', 'Login': 1})
    if '=xxx' in res.headers.get('Set-Cookie', ''):
        raise Exception('Failed to login')
    res = s.post('https://grades.cs.technion.ac.il',
                 {'COOKIE': res.cookies['LastGradesCookie'], 'RecreatePath': 1, 'SEM': '201902'})

    res_str = res.text.lower()

    if 'finala' not in res_str:
        raise Exception('Not in grades page')

    if last_th == -1:
        last_th = res_str.count("<th>")
        continue
    elif res_str.count('<th>') != last_th or 'proj' in res_str:
        print('Hurray, you have new grades!!!')
        duration = 300  # milliseconds
        freq = 2000  # Hz
        for i in range(100):
            winsound.Beep(freq, duration)
            time.sleep(duration/3000)
        break
    else:
        print('No grades yet. Sorry :-(')

    time.sleep(600)