Python cron script for e-mail notifications about Rappidgator Premium accounts on Reddit...

links.txt

<a class="title may-blank " href="http://premiumaccs.cu.cc/2015/10/09/rapidgator-premium-account-october-9th/" rel="nofollow" tabindex="1">Rapidgator Premium Account October 9th</a>

RapidgatorPremiumNotifier.py

#!/usr/bin/env python

__author__ = 'amerzec'

"""
    This script checks Reddit updates of Premium Rapidgator accounts
    and sends e-mail notification with new link where you can get those accounts.
    It is based on:
     1. Parsing URL: https://www.reddit.com/r/rapidgator/
     2. Sending e-mail with SendGrid account
"""

from urllib.request import urlopen
from urllib.error import HTTPError
from bs4 import BeautifulSoup
import sendgrid


#Constants
EMAIL_FROM = "[email protected]"
EMAIL_TO = "[email protected]"
SENDGRID_API_KEY = "REPLACE_WITH_YOUR_OWN_API_KEY"

REDDIT_RAPIDGATOR_URL = "https://www.reddit.com/r/rapidgator/"
UPDATE_FILE = "links.txt"


def getRapidGators(url):
    try:
        html = urlopen(url)
    except HTTPError as e:
        print(e.strerror)
        return None
    try:
        bsObj = BeautifulSoup(html.read(), "html.parser")
        mydivs = bsObj.findAll("a", { "tabindex" : "1" })
    except AttributeError as e:
        return None
    return mydivs

def sendEmail(link):
    sg = sendgrid.SendGridClient(SENDGRID_API_KEY)
    message = sendgrid.Mail()

    message.add_to(EMAIL_TO)
    message.set_from(EMAIL_FROM)
    message.set_subject("New Rapidgator Premiums...")
    message.set_html(link)
    sg.send(message)

def checkIfAlreadyExists(fileName, link):
    # Open a file
    f = open(fileName, 'r+')
    lines = f.readlines()

    exists = True
    if len(lines) == 0:
        exists = False

    for line in lines:
        if line == link:
            exists = True

    if not exists:
        f.write(link)
        f.truncate()
        f.close()

    return exists


#Main
myRapids = getRapidGators(REDDIT_RAPIDGATOR_URL)
if myRapids == None:
    print("Rapidgators could not be found...")
else:
    print(myRapids[1])
    rapids = []
    for x in myRapids:
        rapids.append(str(x))

    if checkIfAlreadyExists(UPDATE_FILE, rapids[1]):
        pass
    else:
        sendEmail(rapids[1])