Script to tell me how much data I have left on my 3 SIM

three-data-checker.py

#!/usr/bin/env python

import os
import re
import requests

s = requests.Session()

class ThreeWebsite(object):
    username = os.environ['PHONE_NUMBER']
    password = os.environ['PASSWORD']
    data_allowance_url = 'https://www.three.co.uk/New_My3/Data_allowance?id=My3_CheckYourDataAllowance'

    def login(self, url):
        text = s.get(url).text  # Redirects to login page
        url = re.search('<iframe id="loginIframe" src="([^"]*)"', text).group(1)
        text = s.get(url).text  # Fetch the actual login form, in an iframe
        lt = re.search('name="lt" value="([^"]*)"', text).group(1)
        text = s.post(url, data={'username': self.username, 'password': self.password, 'lt': lt}).text
        url = re.findall("self.parent.location.href = '([^']*)'", text)[1]  # First is if-cookie-missing
        return s.get(url).text

    def get(self, url):
        text = s.get(url).text
        if 'Login successful' in text:  # Actually means we need to log in
            text = self.login(url)
        return text

    def show_usage(self):
        text = self.get(self.data_allowance_url)
        m = re.search('<th[^>]*>Valid until</th>\s*<th[^>]*>Remaining</th>\s*</tr>\s*'
                      '<tr>\s*<td[^>]*>\s*</td>\s*<td>\s*(.*?)\s*</td>\s*<td[^>]*>\s*(.*?)\s*</td>(?s)', text)
        expiry, left = m.groups()
        print 'You have %sMb left, expires %s' % (left, expiry)

ThreeWebsite().show_usage()