Xfinitywifi autologin python script

#!/usr/bin/python
# myscript
import time
import random
from splinter import Browser
import sys

class DevNull:
    def write(self,msg):
       pass

sys.stderr = DevNull()

email = str(random.randrange(10000000,99999999))+'@yahoo.com'
zip_code = random.randrange(10000,99999)
url = 'http://captive.apple.com'
browser = Browser('firefox')

browser.visit(url)
time.sleep(1)
browser.find_by_text('I am not an XFINITY customer').first.click()
time.sleep(1)
browser.click_link_by_partial_href('https://xfinity.nnu.com/xfinitywifi/')
time.sleep(1)
browser.select("rateplanid","spn")
browser.fill('spn_postal',zip_code)
browser.fill('spn_email',email)

sys.stderr = DevNull()

email = str(random.randrange(10000000,99999999))+'@yahoo.com'
zip_code = random.randrange(10000,99999)
url = 'http://captive.apple.com'
browser = Browser('firefox')

browser.visit(url)
time.sleep(1)
browser.find_by_text('I am not an XFINITY customer').first.click()
time.sleep(1)
browser.click_link_by_partial_href('https://xfinity.nnu.com/xfinitywifi/')
time.sleep(1)
browser.select("rateplanid","spn")
browser.fill('spn_postal',zip_code)
browser.fill('spn_email',email)
browser.check('spn_terms')
time.sleep(1)
browser.find_by_value('submit').first.click()
time.sleep(10)