fixed reference error

def test_network(url):

   try:

      with login.get(url, timeout=10, allow_redirects=False) as test:

          if test.status_code == 200:

             status = CONNECTED

          if 300 > test.status_code >= 200:

             return CONNECTED, None

          elif test.status_code == 302:

             content = login.get(test.headers['Location'], timeout=10).content

             soup_login = BeautifulSoup(content, 'html5lib')

             if 'CAS' not in soup_login.title.string:

                logging.warning('Not connected to a SUSTC network')

                status = CONNECTED

                return CONNECTED, None

             else:

                status = NEED_LOGIN

                return NEED_LOGIN, re.search(r'window\.location = \'(.*)\';', soup_login.text).group(1)

          else:

             logging.warning('Recieved status code {code}, consider updating \'captive_portal_server\''.format(code=test.status_code))

             status = CONNECTION_TIMEOUT

             return CONNECTION_TIMEOUT, None

   except requests.RequestException:

       status = CONNECTION_TIMEOUT

   return status

       return CONNECTION_TIMEOUT, None

def main():

   while True:

      logging.info('Checking network status...')

      status = test_network(test_url)

      status, rem_link = test_network(test_url)

      if status == CONNECTION_TIMEOUT:

         logging.info('Connection FAILED. Try again in ' + str(config['interval_retry_connection']) + ' sec.')

         times_retry_login -= 1

         logging.info('You are offline. Starting login...')

         hostname = 'http://enet.10000.gd.cn:10001/sz/sz112/'

         rem_link = re.search(r'window\.location = \'(.*)\';', soup_login.text).group(1)

         url = hostname + rem_link

         success, err = do_login(url, config['username'], config['password'])