tracker.py

import requests
import os
from time import sleep
url = input('Enter the url you want to track: ')
gap = int(input('Amount of time after which it should check for update(in seconds) : '))

print(
"""
To terminate the program press Cmd/Ctrl + C
"""
)


while True:
    time = 0
    content1 = requests.get(url)                    #Page source at time = 0
    while True:
        if (time) <= gap:
            print('Time passed: ' + str(time))
            sleep(10)
            time += 10
        else:
            break
    content2 = requests.get(url)                    #Page source after time = gap
    if content1.content != content2.content:        #Checks whether the page source has changed
        os.system("send-notif 'There has been some changes'")
        print('Changed')
    else:
        print('Not changed!')
        pass