Check today's free ebook from Packpub

packtpub.py

import datetime
import os
import re
import socket
import Tkinter as Tk
import urllib2
import webbrowser


FREE_EBOOK_URL = 'https://www.packtpub.com/packt/offers/free-learning'


def open_url():
    webbrowser.open_new(FREE_EBOOK_URL)

timeout = 2
socket.setdefaulttimeout(timeout)
today = datetime.datetime.today()
formatted_today = today.strftime('%d-%m-%Y')

last_date = ''
if os.path.exists('/home/rocha/last_ebook'):
    with open('/home/rocha/last_ebook', 'r') as last_file:
        last_ebook = last_file.read()
        last_date, last_title = last_ebook.split('|')

if formatted_today != last_date:
    try:
        request = urllib2.Request(FREE_EBOOK_URL)
        response = urllib2.urlopen(request)
    except:
        pass
    else:
        html = response.read()
        html = html.replace('\n', '')
        html = html.replace('\t', '')
    
        book_title_regex = '<div class="dotd-title"><h2>(.+?)</h2></div>'
        pattern = re.compile(book_title_regex)
    
        title = re.findall(pattern, html)
    
        if title:
            today_title = title.pop(0)
            message = 'Free e-book for {0}: {1}'.format(formatted_today, today_title)
            with open('/home/rocha/last_ebook', 'w') as last_file:
                last_file.write('|'.join([formatted_today, today_title]))
        else:
            message = 'Unable to identify {0} free e-book'.format(formatted_today)
    
        root = Tk.Tk()
        root.after(5000, lambda: root.destroy())
    
        label = Tk.Label(root, text=message, font=('Helvetica', 20))
        label.pack()
    
        button = Tk.Button(root, text="ABRIR", command=open_url)
        button.pack()
    
        root.mainloop()